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[update] add missing littlefs by gitigore

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jzlv 2023-01-18 13:57:44 +08:00
parent e0ebebd4e9
commit 1602152550
48 changed files with 23370 additions and 0 deletions
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26
components/fs/littlefs/littlefs/.github/workflows/post-release.yml vendored Normal file
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name: post-release
on:
release:
branches: [master]
types: [released]
jobs:
post-release:
runs-on: ubuntu-20.04
steps:
# trigger post-release in dependency repo, this indirection allows the
# dependency repo to be updated often without affecting this repo. At
# the time of this comment, the dependency repo is responsible for
# creating PRs for other dependent repos post-release.
- name: trigger-post-release
continue-on-error: true
run: |
curl -sS -X POST -H "authorization: token ${{secrets.BOT_TOKEN}}" \
"$GITHUB_API_URL/repos/${{secrets.POST_RELEASE_REPO}}/dispatches" \
-d "$(jq -n '{
event_type: "post-release",
client_payload: {
repo: env.GITHUB_REPOSITORY,
version: "${{github.event.release.tag_name}}"}}' \
| tee /dev/stderr)"

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name: release
on:
workflow_run:
workflows: [test]
branches: [master]
types: [completed]
jobs:
release:
runs-on: ubuntu-20.04
# need to manually check for a couple things
# - tests passed?
# - we are the most recent commit on master?
if: ${{github.event.workflow_run.conclusion == 'success' &&
github.event.workflow_run.head_sha == github.sha}}
steps:
- uses: actions/checkout@v2
with:
ref: ${{github.event.workflow_run.head_sha}}
# need workflow access since we push branches
# containing workflows
token: ${{secrets.BOT_TOKEN}}
# need all tags
fetch-depth: 0
# try to get results from tests
- uses: dawidd6/action-download-artifact@v2
continue-on-error: true
with:
workflow: ${{github.event.workflow_run.name}}
run_id: ${{github.event.workflow_run.id}}
name: results
path: results
- name: find-version
run: |
# rip version from lfs.h
LFS_VERSION="$(grep -o '^#define LFS_VERSION .*$' lfs.h \
| awk '{print $3}')"
LFS_VERSION_MAJOR="$((0xffff & ($LFS_VERSION >> 16)))"
LFS_VERSION_MINOR="$((0xffff & ($LFS_VERSION >> 0)))"
# find a new patch version based on what we find in our tags
LFS_VERSION_PATCH="$( \
( git describe --tags --abbrev=0 \
--match="v$LFS_VERSION_MAJOR.$LFS_VERSION_MINOR.*" \
|| echo 'v0.0.-1' ) \
| awk -F '.' '{print $3+1}')"
# found new version
LFS_VERSION="v$LFS_VERSION_MAJOR`
`.$LFS_VERSION_MINOR`
`.$LFS_VERSION_PATCH"
echo "LFS_VERSION=$LFS_VERSION"
echo "LFS_VERSION=$LFS_VERSION" >> $GITHUB_ENV
echo "LFS_VERSION_MAJOR=$LFS_VERSION_MAJOR" >> $GITHUB_ENV
echo "LFS_VERSION_MINOR=$LFS_VERSION_MINOR" >> $GITHUB_ENV
echo "LFS_VERSION_PATCH=$LFS_VERSION_PATCH" >> $GITHUB_ENV
# try to find previous version?
- name: find-prev-version
continue-on-error: true
run: |
LFS_PREV_VERSION="$(git describe --tags --abbrev=0 --match 'v*')"
echo "LFS_PREV_VERSION=$LFS_PREV_VERSION"
echo "LFS_PREV_VERSION=$LFS_PREV_VERSION" >> $GITHUB_ENV
# try to find results from tests
- name: collect-results
run: |
# previous results to compare against?
[ -n "$LFS_PREV_VERSION" ] && curl -sS \
"$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/`
`status/$LFS_PREV_VERSION?per_page=100" \
| jq -re 'select(.sha != env.GITHUB_SHA) | .statuses[]' \
>> prev-results.json \
|| true
# build table for GitHub
echo "<table>" >> results.txt
echo "<thead>" >> results.txt
echo "<tr>" >> results.txt
echo "<th align=left>Configuration</th>" >> results.txt
for r in Code Stack Structs Coverage
do
echo "<th align=right>$r</th>" >> results.txt
done
echo "</tr>" >> results.txt
echo "</thead>" >> results.txt
echo "<tbody>" >> results.txt
for c in "" readonly threadsafe migrate error-asserts
do
echo "<tr>" >> results.txt
c_or_default=${c:-default}
echo "<td align=left>${c_or_default^}</td>" >> results.txt
for r in code stack structs
do
# per-config results
echo "<td align=right>" >> results.txt
[ -e results/thumb${c:+-$c}.csv ] && ( \
export PREV="$(jq -re '
select(.context == "'"results (thumb${c:+, $c}) / $r"'").description
| capture("(?<result>[0-9∞]+)").result' \
prev-results.json || echo 0)"
./scripts/summary.py results/thumb${c:+-$c}.csv -f $r -Y | awk '
NR==2 {printf "%s B",$2}
NR==2 && ENVIRON["PREV"]+0 != 0 {
printf " (%+.1f%%)",100*($2-ENVIRON["PREV"])/ENVIRON["PREV"]}
NR==2 {printf "\n"}' \
| sed -e 's/ /\&nbsp;/g' \
>> results.txt)
echo "</td>" >> results.txt
done
# coverage results
if [ -z $c ]
then
echo "<td rowspan=0 align=right>" >> results.txt
[ -e results/coverage.csv ] && ( \
export PREV="$(jq -re '
select(.context == "results / coverage").description
| capture("(?<result>[0-9\\.]+)").result' \
prev-results.json || echo 0)"
./scripts/coverage.py -u results/coverage.csv -Y | awk -F '[ /%]+' '
NR==2 {printf "%.1f%% of %d lines",$4,$3}
NR==2 && ENVIRON["PREV"]+0 != 0 {
printf " (%+.1f%%)",$4-ENVIRON["PREV"]}
NR==2 {printf "\n"}' \
| sed -e 's/ /\&nbsp;/g' \
>> results.txt)
echo "</td>" >> results.txt
fi
echo "</tr>" >> results.txt
done
echo "</tbody>" >> results.txt
echo "</table>" >> results.txt
cat results.txt
# find changes from history
- name: collect-changes
run: |
[ -n "$LFS_PREV_VERSION" ] || exit 0
# use explicit link to github commit so that release notes can
# be copied elsewhere
git log "$LFS_PREV_VERSION.." \
--grep='^Merge' --invert-grep \
--format="format:[\`%h\`](`
`https://github.com/$GITHUB_REPOSITORY/commit/%h) %s" \
> changes.txt
echo "CHANGES:"
cat changes.txt
# create and update major branches (vN and vN-prefix)
- name: create-major-branches
run: |
# create major branch
git branch "v$LFS_VERSION_MAJOR" HEAD
# create major prefix branch
git config user.name ${{secrets.BOT_USER}}
git config user.email ${{secrets.BOT_EMAIL}}
git fetch "https://github.com/$GITHUB_REPOSITORY.git" \
"v$LFS_VERSION_MAJOR-prefix" || true
./scripts/prefix.py "lfs$LFS_VERSION_MAJOR"
git branch "v$LFS_VERSION_MAJOR-prefix" $( \
git commit-tree $(git write-tree) \
$(git rev-parse --verify -q FETCH_HEAD | sed -e 's/^/-p /') \
-p HEAD \
-m "Generated v$LFS_VERSION_MAJOR prefixes")
git reset --hard
# push!
git push --atomic origin \
"v$LFS_VERSION_MAJOR" \
"v$LFS_VERSION_MAJOR-prefix"
# build release notes
- name: create-release
run: |
# create release and patch version tag (vN.N.N)
# only draft if not a patch release
[ -e results.txt ] && export RESULTS="$(cat results.txt)"
[ -e changes.txt ] && export CHANGES="$(cat changes.txt)"
curl -sS -X POST -H "authorization: token ${{secrets.BOT_TOKEN}}" \
"$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/releases" \
-d "$(jq -n '{
tag_name: env.LFS_VERSION,
name: env.LFS_VERSION | rtrimstr(".0"),
target_commitish: "${{github.event.workflow_run.head_sha}}",
draft: env.LFS_VERSION | endswith(".0"),
body: [env.RESULTS, env.CHANGES | select(.)] | join("\n\n")}' \
| tee /dev/stderr)"

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name: status
on:
workflow_run:
workflows: [test]
types: [completed]
jobs:
status:
runs-on: ubuntu-20.04
steps:
# custom statuses?
- uses: dawidd6/action-download-artifact@v2
continue-on-error: true
with:
workflow: ${{github.event.workflow_run.name}}
run_id: ${{github.event.workflow_run.id}}
name: status
path: status
- name: update-status
continue-on-error: true
run: |
ls status
for s in $(shopt -s nullglob ; echo status/*.json)
do
# parse requested status
export STATE="$(jq -er '.state' $s)"
export CONTEXT="$(jq -er '.context' $s)"
export DESCRIPTION="$(jq -er '.description' $s)"
# help lookup URL for job/steps because GitHub makes
# it VERY HARD to link to specific jobs
export TARGET_URL="$(
jq -er '.target_url // empty' $s || (
export TARGET_JOB="$(jq -er '.target_job' $s)"
export TARGET_STEP="$(jq -er '.target_step // ""' $s)"
curl -sS -H "authorization: token ${{secrets.BOT_TOKEN}}" \
"$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/actions/runs/`
`${{github.event.workflow_run.id}}/jobs" \
| jq -er '.jobs[]
| select(.name == env.TARGET_JOB)
| .html_url
+ "?check_suite_focus=true"
+ ((.steps[]
| select(.name == env.TARGET_STEP)
| "#step:\(.number):0") // "")'))"
# update status
curl -sS -X POST -H "authorization: token ${{secrets.BOT_TOKEN}}" \
"$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/statuses/`
`${{github.event.workflow_run.head_sha}}" \
-d "$(jq -n '{
state: env.STATE,
context: env.CONTEXT,
description: env.DESCRIPTION,
target_url: env.TARGET_URL}' \
| tee /dev/stderr)"
done

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name: test
on: [push, pull_request]
env:
CFLAGS: -Werror
MAKEFLAGS: -j
jobs:
# run tests
test:
runs-on: ubuntu-20.04
strategy:
fail-fast: false
matrix:
arch: [x86_64, thumb, mips, powerpc]
steps:
- uses: actions/checkout@v2
- name: install
run: |
# need a few additional tools
#
# note this includes gcc-10, which is required for -fcallgraph-info=su
sudo apt-get update -qq
sudo apt-get install -qq gcc-10 python3 python3-pip lcov
sudo pip3 install toml
echo "CC=gcc-10" >> $GITHUB_ENV
gcc-10 --version
lcov --version
python3 --version
# need newer lcov version for gcc-10
#sudo apt-get remove lcov
#wget https://launchpad.net/ubuntu/+archive/primary/+files/lcov_1.15-1_all.deb
#sudo apt install ./lcov_1.15-1_all.deb
#lcov --version
#which lcov
#ls -lha /usr/bin/lcov
wget https://github.com/linux-test-project/lcov/releases/download/v1.15/lcov-1.15.tar.gz
tar xf lcov-1.15.tar.gz
sudo make -C lcov-1.15 install
# setup a ram-backed disk to speed up reentrant tests
mkdir disks
sudo mount -t tmpfs -o size=100m tmpfs disks
TESTFLAGS="$TESTFLAGS --disk=disks/disk"
# collect coverage
mkdir -p coverage
TESTFLAGS="$TESTFLAGS --coverage=`
`coverage/${{github.job}}-${{matrix.arch}}.info"
echo "TESTFLAGS=$TESTFLAGS" >> $GITHUB_ENV
# cross-compile with ARM Thumb (32-bit, little-endian)
- name: install-thumb
if: ${{matrix.arch == 'thumb'}}
run: |
sudo apt-get install -qq \
gcc-10-arm-linux-gnueabi \
libc6-dev-armel-cross \
qemu-user
echo "CC=arm-linux-gnueabi-gcc-10 -mthumb --static" >> $GITHUB_ENV
echo "EXEC=qemu-arm" >> $GITHUB_ENV
arm-linux-gnueabi-gcc-10 --version
qemu-arm -version
# cross-compile with MIPS (32-bit, big-endian)
- name: install-mips
if: ${{matrix.arch == 'mips'}}
run: |
sudo apt-get install -qq \
gcc-10-mips-linux-gnu \
libc6-dev-mips-cross \
qemu-user
echo "CC=mips-linux-gnu-gcc-10 --static" >> $GITHUB_ENV
echo "EXEC=qemu-mips" >> $GITHUB_ENV
mips-linux-gnu-gcc-10 --version
qemu-mips -version
# cross-compile with PowerPC (32-bit, big-endian)
- name: install-powerpc
if: ${{matrix.arch == 'powerpc'}}
run: |
sudo apt-get install -qq \
gcc-10-powerpc-linux-gnu \
libc6-dev-powerpc-cross \
qemu-user
echo "CC=powerpc-linux-gnu-gcc-10 --static" >> $GITHUB_ENV
echo "EXEC=qemu-ppc" >> $GITHUB_ENV
powerpc-linux-gnu-gcc-10 --version
qemu-ppc -version
# make sure example can at least compile
- name: test-example
run: |
sed -n '/``` c/,/```/{/```/d; p}' README.md > test.c
make all CFLAGS+=" \
-Duser_provided_block_device_read=NULL \
-Duser_provided_block_device_prog=NULL \
-Duser_provided_block_device_erase=NULL \
-Duser_provided_block_device_sync=NULL \
-include stdio.h"
rm test.c
# test configurations
# normal+reentrant tests
- name: test-default
run: |
make clean
make test TESTFLAGS+="-nrk"
# NOR flash: read/prog = 1 block = 4KiB
- name: test-nor
run: |
make clean
make test TESTFLAGS+="-nrk \
-DLFS_READ_SIZE=1 -DLFS_BLOCK_SIZE=4096"
# SD/eMMC: read/prog = 512 block = 512
- name: test-emmc
run: |
make clean
make test TESTFLAGS+="-nrk \
-DLFS_READ_SIZE=512 -DLFS_BLOCK_SIZE=512"
# NAND flash: read/prog = 4KiB block = 32KiB
- name: test-nand
run: |
make clean
make test TESTFLAGS+="-nrk \
-DLFS_READ_SIZE=4096 -DLFS_BLOCK_SIZE=\(32*1024\)"
# other extreme geometries that are useful for various corner cases
- name: test-no-intrinsics
run: |
make clean
make test TESTFLAGS+="-nrk \
-DLFS_NO_INTRINSICS"
- name: test-byte-writes
# it just takes too long to test byte-level writes when in qemu,
# should be plenty covered by the other configurations
if: ${{matrix.arch == 'x86_64'}}
run: |
make clean
make test TESTFLAGS+="-nrk \
-DLFS_READ_SIZE=1 -DLFS_CACHE_SIZE=1"
- name: test-block-cycles
run: |
make clean
make test TESTFLAGS+="-nrk \
-DLFS_BLOCK_CYCLES=1"
- name: test-odd-block-count
run: |
make clean
make test TESTFLAGS+="-nrk \
-DLFS_BLOCK_COUNT=1023 -DLFS_LOOKAHEAD_SIZE=256"
- name: test-odd-block-size
run: |
make clean
make test TESTFLAGS+="-nrk \
-DLFS_READ_SIZE=11 -DLFS_BLOCK_SIZE=704"
# upload coverage for later coverage
- name: upload-coverage
uses: actions/upload-artifact@v2
with:
name: coverage
path: coverage
retention-days: 1
# update results
- name: results
run: |
mkdir -p results
make clean
make lfs.csv \
CFLAGS+=" \
-DLFS_NO_ASSERT \
-DLFS_NO_DEBUG \
-DLFS_NO_WARN \
-DLFS_NO_ERROR"
cp lfs.csv results/${{matrix.arch}}.csv
./scripts/summary.py results/${{matrix.arch}}.csv
- name: results-readonly
run: |
mkdir -p results
make clean
make lfs.csv \
CFLAGS+=" \
-DLFS_NO_ASSERT \
-DLFS_NO_DEBUG \
-DLFS_NO_WARN \
-DLFS_NO_ERROR \
-DLFS_READONLY"
cp lfs.csv results/${{matrix.arch}}-readonly.csv
./scripts/summary.py results/${{matrix.arch}}-readonly.csv
- name: results-threadsafe
run: |
mkdir -p results
make clean
make lfs.csv \
CFLAGS+=" \
-DLFS_NO_ASSERT \
-DLFS_NO_DEBUG \
-DLFS_NO_WARN \
-DLFS_NO_ERROR \
-DLFS_THREADSAFE"
cp lfs.csv results/${{matrix.arch}}-threadsafe.csv
./scripts/summary.py results/${{matrix.arch}}-threadsafe.csv
- name: results-migrate
run: |
mkdir -p results
make clean
make lfs.csv \
CFLAGS+=" \
-DLFS_NO_ASSERT \
-DLFS_NO_DEBUG \
-DLFS_NO_WARN \
-DLFS_NO_ERROR \
-DLFS_MIGRATE"
cp lfs.csv results/${{matrix.arch}}-migrate.csv
./scripts/summary.py results/${{matrix.arch}}-migrate.csv
- name: results-error-asserts
run: |
mkdir -p results
make clean
make lfs.csv \
CFLAGS+=" \
-DLFS_NO_DEBUG \
-DLFS_NO_WARN \
-DLFS_NO_ERROR \
-D'LFS_ASSERT(test)=do {if(!(test)) {return -1;}} while(0)'"
cp lfs.csv results/${{matrix.arch}}-error-asserts.csv
./scripts/summary.py results/${{matrix.arch}}-error-asserts.csv
- name: upload-results
uses: actions/upload-artifact@v2
with:
name: results
path: results
# create statuses with results
- name: collect-status
run: |
mkdir -p status
for f in $(shopt -s nullglob ; echo results/*.csv)
do
export STEP="results$(
echo $f | sed -n 's/[^-]*-\(.*\).csv/-\1/p')"
for r in code stack structs
do
export CONTEXT="results (${{matrix.arch}}$(
echo $f | sed -n 's/[^-]*-\(.*\).csv/, \1/p')) / $r"
export PREV="$(curl -sS \
"$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/status/master?per_page=100" \
| jq -re 'select(.sha != env.GITHUB_SHA) | .statuses[]
| select(.context == env.CONTEXT).description
| capture("(?<result>[0-9∞]+)").result' \
|| echo 0)"
export DESCRIPTION="$(./scripts/summary.py $f -f $r -Y | awk '
NR==2 {printf "%s B",$2}
NR==2 && ENVIRON["PREV"]+0 != 0 {
printf " (%+.1f%%)",100*($2-ENVIRON["PREV"])/ENVIRON["PREV"]}')"
jq -n '{
state: "success",
context: env.CONTEXT,
description: env.DESCRIPTION,
target_job: "${{github.job}} (${{matrix.arch}})",
target_step: env.STEP}' \
| tee status/$r-${{matrix.arch}}$(
echo $f | sed -n 's/[^-]*-\(.*\).csv/-\1/p').json
done
done
- name: upload-status
uses: actions/upload-artifact@v2
with:
name: status
path: status
retention-days: 1
# run under Valgrind to check for memory errors
valgrind:
runs-on: ubuntu-20.04
steps:
- uses: actions/checkout@v2
- name: install
run: |
# need toml, also pip3 isn't installed by default?
sudo apt-get update -qq
sudo apt-get install -qq python3 python3-pip
sudo pip3 install toml
- name: install-valgrind
run: |
sudo apt-get update -qq
sudo apt-get install -qq valgrind
valgrind --version
# normal tests, we don't need to test all geometries
- name: test-valgrind
run: make test TESTFLAGS+="-k --valgrind"
# test that compilation is warning free under clang
clang:
runs-on: ubuntu-20.04
steps:
- uses: actions/checkout@v2
- name: install
run: |
# need toml, also pip3 isn't installed by default?
sudo apt-get update -qq
sudo apt-get install -qq python3 python3-pip
sudo pip3 install toml
- name: install-clang
run: |
sudo apt-get update -qq
sudo apt-get install -qq clang
echo "CC=clang" >> $GITHUB_ENV
clang --version
# no reason to not test again
- name: test-clang
run: make test TESTFLAGS+="-k"
# self-host with littlefs-fuse for a fuzz-like test
fuse:
runs-on: ubuntu-20.04
if: ${{!endsWith(github.ref, '-prefix')}}
steps:
- uses: actions/checkout@v2
- name: install
run: |
# need toml, also pip3 isn't installed by default?
sudo apt-get update -qq
sudo apt-get install -qq python3 python3-pip libfuse-dev
sudo pip3 install toml
fusermount -V
gcc --version
- uses: actions/checkout@v2
with:
repository: littlefs-project/littlefs-fuse
ref: v2
path: littlefs-fuse
- name: setup
run: |
# copy our new version into littlefs-fuse
rm -rf littlefs-fuse/littlefs/*
cp -r $(git ls-tree --name-only HEAD) littlefs-fuse/littlefs
# setup disk for littlefs-fuse
mkdir mount
LOOP=$(sudo losetup -f)
sudo chmod a+rw $LOOP
dd if=/dev/zero bs=512 count=128K of=disk
losetup $LOOP disk
echo "LOOP=$LOOP" >> $GITHUB_ENV
- name: test
run: |
# self-host test
make -C littlefs-fuse
littlefs-fuse/lfs --format $LOOP
littlefs-fuse/lfs $LOOP mount
ls mount
mkdir mount/littlefs
cp -r $(git ls-tree --name-only HEAD) mount/littlefs
cd mount/littlefs
stat .
ls -flh
make -B test
# test migration using littlefs-fuse
migrate:
runs-on: ubuntu-20.04
if: ${{!endsWith(github.ref, '-prefix')}}
steps:
- uses: actions/checkout@v2
- name: install
run: |
# need toml, also pip3 isn't installed by default?
sudo apt-get update -qq
sudo apt-get install -qq python3 python3-pip libfuse-dev
sudo pip3 install toml
fusermount -V
gcc --version
- uses: actions/checkout@v2
with:
repository: littlefs-project/littlefs-fuse
ref: v2
path: v2
- uses: actions/checkout@v2
with:
repository: littlefs-project/littlefs-fuse
ref: v1
path: v1
- name: setup
run: |
# copy our new version into littlefs-fuse
rm -rf v2/littlefs/*
cp -r $(git ls-tree --name-only HEAD) v2/littlefs
# setup disk for littlefs-fuse
mkdir mount
LOOP=$(sudo losetup -f)
sudo chmod a+rw $LOOP
dd if=/dev/zero bs=512 count=128K of=disk
losetup $LOOP disk
echo "LOOP=$LOOP" >> $GITHUB_ENV
- name: test
run: |
# compile v1 and v2
make -C v1
make -C v2
# run self-host test with v1
v1/lfs --format $LOOP
v1/lfs $LOOP mount
ls mount
mkdir mount/littlefs
cp -r $(git ls-tree --name-only HEAD) mount/littlefs
cd mount/littlefs
stat .
ls -flh
make -B test
# attempt to migrate
cd ../..
fusermount -u mount
v2/lfs --migrate $LOOP
v2/lfs $LOOP mount
# run self-host test with v2 right where we left off
ls mount
cd mount/littlefs
stat .
ls -flh
make -B test
# collect coverage info
coverage:
runs-on: ubuntu-20.04
needs: [test]
steps:
- uses: actions/checkout@v2
- name: install
run: |
sudo apt-get update -qq
sudo apt-get install -qq python3 python3-pip lcov
sudo pip3 install toml
# yes we continue-on-error nearly every step, continue-on-error
# at job level apparently still marks a job as failed, which isn't
# what we want
- uses: actions/download-artifact@v2
continue-on-error: true
with:
name: coverage
path: coverage
- name: results-coverage
continue-on-error: true
run: |
mkdir -p results
lcov $(for f in coverage/*.info ; do echo "-a $f" ; done) \
-o results/coverage.info
./scripts/coverage.py results/coverage.info -o results/coverage.csv
- name: upload-results
uses: actions/upload-artifact@v2
with:
name: results
path: results
- name: collect-status
run: |
mkdir -p status
[ -e results/coverage.csv ] || exit 0
export STEP="results-coverage"
export CONTEXT="results / coverage"
export PREV="$(curl -sS \
"$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/status/master?per_page=100" \
| jq -re 'select(.sha != env.GITHUB_SHA) | .statuses[]
| select(.context == env.CONTEXT).description
| capture("(?<result>[0-9\\.]+)").result' \
|| echo 0)"
export DESCRIPTION="$(
./scripts/coverage.py -u results/coverage.csv -Y | awk -F '[ /%]+' '
NR==2 {printf "%.1f%% of %d lines",$4,$3}
NR==2 && ENVIRON["PREV"]+0 != 0 {
printf " (%+.1f%%)",$4-ENVIRON["PREV"]}')"
jq -n '{
state: "success",
context: env.CONTEXT,
description: env.DESCRIPTION,
target_job: "${{github.job}}",
target_step: env.STEP}' \
| tee status/coverage.json
- name: upload-status
uses: actions/upload-artifact@v2
with:
name: status
path: status
retention-days: 1

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# Compilation output
*.o
*.d
*.a
*.ci
*.csv
# Testing things
blocks/
lfs
test.c
tests/*.toml.*
scripts/__pycache__
.gdb_history

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25
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Copyright (c) 2022, The littlefs authors.
Copyright (c) 2017, Arm Limited. All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice, this
list of conditions and the following disclaimer in the documentation and/or
other materials provided with the distribution.
- Neither the name of ARM nor the names of its contributors may be used to
endorse or promote products derived from this software without specific prior
written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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ifdef BUILDDIR
# make sure BUILDDIR ends with a slash
override BUILDDIR := $(BUILDDIR)/
# bit of a hack, but we want to make sure BUILDDIR directory structure
# is correct before any commands
$(if $(findstring n,$(MAKEFLAGS)),, $(shell mkdir -p \
$(BUILDDIR) \
$(BUILDDIR)bd \
$(BUILDDIR)tests))
endif
# overridable target/src/tools/flags/etc
ifneq ($(wildcard test.c main.c),)
TARGET ?= $(BUILDDIR)lfs
else
TARGET ?= $(BUILDDIR)lfs.a
endif
CC ?= gcc
AR ?= ar
SIZE ?= size
CTAGS ?= ctags
NM ?= nm
OBJDUMP ?= objdump
LCOV ?= lcov
SRC ?= $(wildcard *.c)
OBJ := $(SRC:%.c=$(BUILDDIR)%.o)
DEP := $(SRC:%.c=$(BUILDDIR)%.d)
ASM := $(SRC:%.c=$(BUILDDIR)%.s)
CGI := $(SRC:%.c=$(BUILDDIR)%.ci)
ifdef DEBUG
override CFLAGS += -O0
else
override CFLAGS += -Os
endif
ifdef TRACE
override CFLAGS += -DLFS_YES_TRACE
endif
override CFLAGS += -g3
override CFLAGS += -I.
override CFLAGS += -std=c99 -Wall -Wextra -pedantic
ifdef VERBOSE
override TESTFLAGS += -v
override CALLSFLAGS += -v
override CODEFLAGS += -v
override DATAFLAGS += -v
override STACKFLAGS += -v
override STRUCTSFLAGS += -v
override COVERAGEFLAGS += -v
endif
ifdef EXEC
override TESTFLAGS += --exec="$(EXEC)"
endif
ifdef COVERAGE
override TESTFLAGS += --coverage
endif
ifdef BUILDDIR
override TESTFLAGS += --build-dir="$(BUILDDIR:/=)"
override CALLSFLAGS += --build-dir="$(BUILDDIR:/=)"
override CODEFLAGS += --build-dir="$(BUILDDIR:/=)"
override DATAFLAGS += --build-dir="$(BUILDDIR:/=)"
override STACKFLAGS += --build-dir="$(BUILDDIR:/=)"
override STRUCTSFLAGS += --build-dir="$(BUILDDIR:/=)"
override COVERAGEFLAGS += --build-dir="$(BUILDDIR:/=)"
endif
ifneq ($(NM),nm)
override CODEFLAGS += --nm-tool="$(NM)"
override DATAFLAGS += --nm-tool="$(NM)"
endif
ifneq ($(OBJDUMP),objdump)
override STRUCTSFLAGS += --objdump-tool="$(OBJDUMP)"
endif
# commands
.PHONY: all build
all build: $(TARGET)
.PHONY: asm
asm: $(ASM)
.PHONY: size
size: $(OBJ)
$(SIZE) -t $^
.PHONY: tags
tags:
$(CTAGS) --totals --c-types=+p $(shell find -H -name '*.h') $(SRC)
.PHONY: calls
calls: $(CGI)
./scripts/calls.py $^ $(CALLSFLAGS)
.PHONY: test
test:
./scripts/test.py $(TESTFLAGS)
.SECONDEXPANSION:
test%: tests/test$$(firstword $$(subst \#, ,%)).toml
./scripts/test.py $@ $(TESTFLAGS)
.PHONY: code
code: $(OBJ)
./scripts/code.py $^ -S $(CODEFLAGS)
.PHONY: data
data: $(OBJ)
./scripts/data.py $^ -S $(DATAFLAGS)
.PHONY: stack
stack: $(CGI)
./scripts/stack.py $^ -S $(STACKFLAGS)
.PHONY: structs
structs: $(OBJ)
./scripts/structs.py $^ -S $(STRUCTSFLAGS)
.PHONY: coverage
coverage:
./scripts/coverage.py $(BUILDDIR)tests/*.toml.info -s $(COVERAGEFLAGS)
.PHONY: summary
summary: $(BUILDDIR)lfs.csv
./scripts/summary.py -Y $^ $(SUMMARYFLAGS)
# rules
-include $(DEP)
.SUFFIXES:
$(BUILDDIR)lfs: $(OBJ)
$(CC) $(CFLAGS) $^ $(LFLAGS) -o $@
$(BUILDDIR)lfs.a: $(OBJ)
$(AR) rcs $@ $^
$(BUILDDIR)lfs.csv: $(OBJ) $(CGI)
./scripts/code.py $(OBJ) -q $(CODEFLAGS) -o $@
./scripts/data.py $(OBJ) -q -m $@ $(DATAFLAGS) -o $@
./scripts/stack.py $(CGI) -q -m $@ $(STACKFLAGS) -o $@
./scripts/structs.py $(OBJ) -q -m $@ $(STRUCTSFLAGS) -o $@
$(if $(COVERAGE),\
./scripts/coverage.py $(BUILDDIR)tests/*.toml.info \
-q -m $@ $(COVERAGEFLAGS) -o $@)
$(BUILDDIR)%.o: %.c
$(CC) -c -MMD $(CFLAGS) $< -o $@
$(BUILDDIR)%.s: %.c
$(CC) -S $(CFLAGS) $< -o $@
# gcc depends on the output file for intermediate file names, so
# we can't omit to .o output. We also need to serialize with the
# normal .o rule because otherwise we can end up with multiprocess
# problems with two instances of gcc modifying the same .o
$(BUILDDIR)%.ci: %.c | $(BUILDDIR)%.o
$(CC) -c -MMD -fcallgraph-info=su $(CFLAGS) $< -o $|
# clean everything
.PHONY: clean
clean:
rm -f $(BUILDDIR)lfs
rm -f $(BUILDDIR)lfs.a
rm -f $(BUILDDIR)lfs.csv
rm -f $(OBJ)
rm -f $(CGI)
rm -f $(DEP)
rm -f $(ASM)
rm -f $(BUILDDIR)tests/*.toml.*

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## littlefs
A little fail-safe filesystem designed for microcontrollers.
```
| | | .---._____
.-----. | |
--|o |---| littlefs |
--| |---| |
'-----' '----------'
| | |
```
**Power-loss resilience** - littlefs is designed to handle random power
failures. All file operations have strong copy-on-write guarantees and if
power is lost the filesystem will fall back to the last known good state.
**Dynamic wear leveling** - littlefs is designed with flash in mind, and
provides wear leveling over dynamic blocks. Additionally, littlefs can
detect bad blocks and work around them.
**Bounded RAM/ROM** - littlefs is designed to work with a small amount of
memory. RAM usage is strictly bounded, which means RAM consumption does not
change as the filesystem grows. The filesystem contains no unbounded
recursion and dynamic memory is limited to configurable buffers that can be
provided statically.
## Example
Here's a simple example that updates a file named `boot_count` every time
main runs. The program can be interrupted at any time without losing track
of how many times it has been booted and without corrupting the filesystem:
``` c
#include "lfs.h"
// variables used by the filesystem
lfs_t lfs;
lfs_file_t file;
// configuration of the filesystem is provided by this struct
const struct lfs_config cfg = {
// block device operations
.read = user_provided_block_device_read,
.prog = user_provided_block_device_prog,
.erase = user_provided_block_device_erase,
.sync = user_provided_block_device_sync,
// block device configuration
.read_size = 16,
.prog_size = 16,
.block_size = 4096,
.block_count = 128,
.cache_size = 16,
.lookahead_size = 16,
.block_cycles = 500,
};
// entry point
int main(void) {
// mount the filesystem
int err = lfs_mount(&lfs, &cfg);
// reformat if we can't mount the filesystem
// this should only happen on the first boot
if (err) {
lfs_format(&lfs, &cfg);
lfs_mount(&lfs, &cfg);
}
// read current count
uint32_t boot_count = 0;
lfs_file_open(&lfs, &file, "boot_count", LFS_O_RDWR | LFS_O_CREAT);
lfs_file_read(&lfs, &file, &boot_count, sizeof(boot_count));
// update boot count
boot_count += 1;
lfs_file_rewind(&lfs, &file);
lfs_file_write(&lfs, &file, &boot_count, sizeof(boot_count));
// remember the storage is not updated until the file is closed successfully
lfs_file_close(&lfs, &file);
// release any resources we were using
lfs_unmount(&lfs);
// print the boot count
printf("boot_count: %d\n", boot_count);
}
```
## Usage
Detailed documentation (or at least as much detail as is currently available)
can be found in the comments in [lfs.h](lfs.h).
littlefs takes in a configuration structure that defines how the filesystem
operates. The configuration struct provides the filesystem with the block
device operations and dimensions, tweakable parameters that tradeoff memory
usage for performance, and optional static buffers if the user wants to avoid
dynamic memory.
The state of the littlefs is stored in the `lfs_t` type which is left up
to the user to allocate, allowing multiple filesystems to be in use
simultaneously. With the `lfs_t` and configuration struct, a user can
format a block device or mount the filesystem.
Once mounted, the littlefs provides a full set of POSIX-like file and
directory functions, with the deviation that the allocation of filesystem
structures must be provided by the user.
All POSIX operations, such as remove and rename, are atomic, even in event
of power-loss. Additionally, file updates are not actually committed to
the filesystem until sync or close is called on the file.
## Other notes
Littlefs is written in C, and specifically should compile with any compiler
that conforms to the `C99` standard.
All littlefs calls have the potential to return a negative error code. The
errors can be either one of those found in the `enum lfs_error` in
[lfs.h](lfs.h), or an error returned by the user's block device operations.
In the configuration struct, the `prog` and `erase` function provided by the
user may return a `LFS_ERR_CORRUPT` error if the implementation already can
detect corrupt blocks. However, the wear leveling does not depend on the return
code of these functions, instead all data is read back and checked for
integrity.
If your storage caches writes, make sure that the provided `sync` function
flushes all the data to memory and ensures that the next read fetches the data
from memory, otherwise data integrity can not be guaranteed. If the `write`
function does not perform caching, and therefore each `read` or `write` call
hits the memory, the `sync` function can simply return 0.
## Design
At a high level, littlefs is a block based filesystem that uses small logs to
store metadata and larger copy-on-write (COW) structures to store file data.
In littlefs, these ingredients form a sort of two-layered cake, with the small
logs (called metadata pairs) providing fast updates to metadata anywhere on
storage, while the COW structures store file data compactly and without any
wear amplification cost.
Both of these data structures are built out of blocks, which are fed by a
common block allocator. By limiting the number of erases allowed on a block
per allocation, the allocator provides dynamic wear leveling over the entire
filesystem.
```
root
.--------.--------.
| A'| B'| |
| | |-> |
| | | |
'--------'--------'
.----' '--------------.
A v B v
.--------.--------. .--------.--------.
| C'| D'| | | E'|new| |
| | |-> | | | E'|-> |
| | | | | | | |
'--------'--------' '--------'--------'
.-' '--. | '------------------.
v v .-' v
.--------. .--------. v .--------.
| C | | D | .--------. write | new E |
| | | | | E | ==> | |
| | | | | | | |
'--------' '--------' | | '--------'
'--------' .-' |
.-' '-. .-------------|------'
v v v v
.--------. .--------. .--------.
| F | | G | | new F |
| | | | | |
| | | | | |
'--------' '--------' '--------'
```
More details on how littlefs works can be found in [DESIGN.md](DESIGN.md) and
[SPEC.md](SPEC.md).
- [DESIGN.md](DESIGN.md) - A fully detailed dive into how littlefs works.
I would suggest reading it as the tradeoffs at work are quite interesting.
- [SPEC.md](SPEC.md) - The on-disk specification of littlefs with all the
nitty-gritty details. May be useful for tooling development.
## Testing
The littlefs comes with a test suite designed to run on a PC using the
[emulated block device](bd/lfs_testbd.h) found in the `bd` directory.
The tests assume a Linux environment and can be started with make:
``` bash
make test
```
## License
The littlefs is provided under the [BSD-3-Clause] license. See
[LICENSE.md](LICENSE.md) for more information. Contributions to this project
are accepted under the same license.
Individual files contain the following tag instead of the full license text.
SPDX-License-Identifier: BSD-3-Clause
This enables machine processing of license information based on the SPDX
License Identifiers that are here available: http://spdx.org/licenses/
## Related projects
- [littlefs-fuse] - A [FUSE] wrapper for littlefs. The project allows you to
mount littlefs directly on a Linux machine. Can be useful for debugging
littlefs if you have an SD card handy.
- [littlefs-js] - A javascript wrapper for littlefs. I'm not sure why you would
want this, but it is handy for demos. You can see it in action
[here][littlefs-js-demo].
- [littlefs-python] - A Python wrapper for littlefs. The project allows you
to create images of the filesystem on your PC. Check if littlefs will fit
your needs, create images for a later download to the target memory or
inspect the content of a binary image of the target memory.
- [mklfs] - A command line tool built by the [Lua RTOS] guys for making
littlefs images from a host PC. Supports Windows, Mac OS, and Linux.
- [Mbed OS] - The easiest way to get started with littlefs is to jump into Mbed
which already has block device drivers for most forms of embedded storage.
littlefs is available in Mbed OS as the [LittleFileSystem] class.
- [SPIFFS] - Another excellent embedded filesystem for NOR flash. As a more
traditional logging filesystem with full static wear-leveling, SPIFFS will
likely outperform littlefs on small memories such as the internal flash on
microcontrollers.
- [Dhara] - An interesting NAND flash translation layer designed for small
MCUs. It offers static wear-leveling and power-resilience with only a fixed
_O(|address|)_ pointer structure stored on each block and in RAM.
[BSD-3-Clause]: https://spdx.org/licenses/BSD-3-Clause.html
[littlefs-fuse]: https://github.com/geky/littlefs-fuse
[FUSE]: https://github.com/libfuse/libfuse
[littlefs-js]: https://github.com/geky/littlefs-js
[littlefs-js-demo]:http://littlefs.geky.net/demo.html
[mklfs]: https://github.com/whitecatboard/Lua-RTOS-ESP32/tree/master/components/mklfs/src
[Lua RTOS]: https://github.com/whitecatboard/Lua-RTOS-ESP32
[Mbed OS]: https://github.com/armmbed/mbed-os
[LittleFileSystem]: https://os.mbed.com/docs/mbed-os/latest/apis/littlefilesystem.html
[SPIFFS]: https://github.com/pellepl/spiffs
[Dhara]: https://github.com/dlbeer/dhara
[littlefs-python]: https://pypi.org/project/littlefs-python/

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## littlefs technical specification
This is the technical specification of the little filesystem. This document
covers the technical details of how the littlefs is stored on disk for
introspection and tooling. This document assumes you are familiar with the
design of the littlefs, for more info on how littlefs works check
out [DESIGN.md](DESIGN.md).
```
| | | .---._____
.-----. | |
--|o |---| littlefs |
--| |---| |
'-----' '----------'
| | |
```
## Some quick notes
- littlefs is a block-based filesystem. The disk is divided into an array of
evenly sized blocks that are used as the logical unit of storage.
- Block pointers are stored in 32 bits, with the special value `0xffffffff`
representing a null block address.
- In addition to the logical block size (which usually matches the erase
block size), littlefs also uses a program block size and read block size.
These determine the alignment of block device operations, but don't need
to be consistent for portability.
- By default, all values in littlefs are stored in little-endian byte order.
## Directories / Metadata pairs
Metadata pairs form the backbone of littlefs and provide a system for
distributed atomic updates. Even the superblock is stored in a metadata pair.
As their name suggests, a metadata pair is stored in two blocks, with one block
providing a backup during erase cycles in case power is lost. These two blocks
are not necessarily sequential and may be anywhere on disk, so a "pointer" to a
metadata pair is stored as two block pointers.
On top of this, each metadata block behaves as an appendable log, containing a
variable number of commits. Commits can be appended to the metadata log in
order to update the metadata without requiring an erase cycles. Note that
successive commits may supersede the metadata in previous commits. Only the
most recent metadata should be considered valid.
The high-level layout of a metadata block is fairly simple:
```
.---------------------------------------.
.-| revision count | entries | \
| |-------------------+ | |
| | | |
| | | +-- 1st commit
| | | |
| | +-------------------| |
| | | CRC | /
| |-------------------+-------------------|
| | entries | \
| | | |
| | | +-- 2nd commit
| | +-------------------+--------------| |
| | | CRC | padding | /
| |----+-------------------+--------------|
| | entries | \
| | | |
| | | +-- 3rd commit
| | +-------------------+---------| |
| | | CRC | | /
| |---------+-------------------+ |
| | unwritten storage | more commits
| | | |
| | | v
| | |
| | |
| '---------------------------------------'
'---------------------------------------'
```
Each metadata block contains a 32-bit revision count followed by a number of
commits. Each commit contains a variable number of metadata entries followed
by a 32-bit CRC.
Note also that entries aren't necessarily word-aligned. This allows us to
store metadata more compactly, however we can only write to addresses that are
aligned to our program block size. This means each commit may have padding for
alignment.
Metadata block fields:
1. **Revision count (32-bits)** - Incremented every erase cycle. If both blocks
contain valid commits, only the block with the most recent revision count
should be used. Sequence comparison must be used to avoid issues with
integer overflow.
2. **CRC (32-bits)** - Detects corruption from power-loss or other write
issues. Uses a CRC-32 with a polynomial of `0x04c11db7` initialized
with `0xffffffff`.
Entries themselves are stored as a 32-bit tag followed by a variable length
blob of data. But exactly how these tags are stored is a little bit tricky.
Metadata blocks support both forward and backward iteration. In order to do
this without duplicating the space for each tag, neighboring entries have their
tags XORed together, starting with `0xffffffff`.
```
Forward iteration Backward iteration
.-------------------. 0xffffffff .-------------------.
| revision count | | | revision count |
|-------------------| v |-------------------|
| tag ~A |---> xor -> tag A | tag ~A |---> xor -> 0xffffffff
|-------------------| | |-------------------| ^
| data A | | | data A | |
| | | | | |
| | | | | |
|-------------------| v |-------------------| |
| tag AxB |---> xor -> tag B | tag AxB |---> xor -> tag A
|-------------------| | |-------------------| ^
| data B | | | data B | |
| | | | | |
| | | | | |
|-------------------| v |-------------------| |
| tag BxC |---> xor -> tag C | tag BxC |---> xor -> tag B
|-------------------| |-------------------| ^
| data C | | data C | |
| | | | tag C
| | | |
| | | |
'-------------------' '-------------------'
```
One last thing to note before we get into the details around tag encoding. Each
tag contains a valid bit used to indicate if the tag and containing commit is
valid. This valid bit is the first bit found in the tag and the commit and can
be used to tell if we've attempted to write to the remaining space in the
block.
Here's a more complete example of metadata block containing 4 entries:
```
.---------------------------------------.
.-| revision count | tag ~A | \
| |-------------------+-------------------| |
| | data A | |
| | | |
| |-------------------+-------------------| |
| | tag AxB | data B | <--. |
| |-------------------+ | | |
| | | | +-- 1st commit
| | +-------------------+---------| | |
| | | tag BxC | | <-.| |
| |---------+-------------------+ | || |
| | data C | || |
| | | || |
| |-------------------+-------------------| || |
| | tag CxCRC | CRC | || /
| |-------------------+-------------------| ||
| | tag CRCxA' | data A' | || \
| |-------------------+ | || |
| | | || |
| | +-------------------+----| || +-- 2nd commit
| | | tag CRCxA' | | || |
| |--------------+-------------------+----| || |
| | CRC | padding | || /
| |--------------+----+-------------------| ||
| | tag CRCxA'' | data A'' | <---. \
| |-------------------+ | ||| |
| | | ||| |
| | +-------------------+---------| ||| |
| | | tag A''xD | | < ||| |
| |---------+-------------------+ | |||| +-- 3rd commit
| | data D | |||| |
| | +---------| |||| |
| | | tag Dx| |||| |
| |---------+-------------------+---------| |||| |
| |CRC | CRC | | |||| /
| |---------+-------------------+ | ||||
| | unwritten storage | |||| more commits
| | | |||| |
| | | |||| v
| | | ||||
| | | ||||
| '---------------------------------------' ||||
'---------------------------------------' |||'- most recent A
||'-- most recent B
|'--- most recent C
'---- most recent D
```
## Metadata tags
So in littlefs, 32-bit tags describe every type of metadata. And this means
_every_ type of metadata, including file entries, directory fields, and
global state. Even the CRCs used to mark the end of commits get their own tag.
Because of this, the tag format contains some densely packed information. Note
that there are multiple levels of types which break down into more info:
```
[---- 32 ----]
[1|-- 11 --|-- 10 --|-- 10 --]
^. ^ . ^ ^- length
|. | . '------------ id
|. '-----.------------------ type (type3)
'.-----------.------------------ valid bit
[-3-|-- 8 --]
^ ^- chunk
'------- type (type1)
```
Before we go further, there's one important thing to note. These tags are
**not** stored in little-endian. Tags stored in commits are actually stored
in big-endian (and is the only thing in littlefs stored in big-endian). This
little bit of craziness comes from the fact that the valid bit must be the
first bit in a commit, and when converted to little-endian, the valid bit finds
itself in byte 4. We could restructure the tag to store the valid bit lower,
but, because none of the fields are byte-aligned, this would be more
complicated than just storing the tag in big-endian.
Another thing to note is that both the tags `0x00000000` and `0xffffffff` are
invalid and can be used for null values.
Metadata tag fields:
1. **Valid bit (1-bit)** - Indicates if the tag is valid.
2. **Type3 (11-bits)** - Type of the tag. This field is broken down further
into a 3-bit abstract type and an 8-bit chunk field. Note that the value
`0x000` is invalid and not assigned a type.
1. **Type1 (3-bits)** - Abstract type of the tag. Groups the tags into
8 categories that facilitate bitmasked lookups.
2. **Chunk (8-bits)** - Chunk field used for various purposes by the different
abstract types. type1+chunk+id form a unique identifier for each tag in the
metadata block.
3. **Id (10-bits)** - File id associated with the tag. Each file in a metadata
block gets a unique id which is used to associate tags with that file. The
special value `0x3ff` is used for any tags that are not associated with a
file, such as directory and global metadata.
4. **Length (10-bits)** - Length of the data in bytes. The special value
`0x3ff` indicates that this tag has been deleted.
## Metadata types
What follows is an exhaustive list of metadata in littlefs.
---
#### `0x401` LFS_TYPE_CREATE
Creates a new file with this id. Note that files in a metadata block
don't necessarily need a create tag. All a create does is move over any
files using this id. In this sense a create is similar to insertion into
an imaginary array of files.
The create and delete tags allow littlefs to keep files in a directory
ordered alphabetically by filename.
---
#### `0x4ff` LFS_TYPE_DELETE
Deletes the file with this id. An inverse to create, this tag moves over
any files neighboring this id similar to a deletion from an imaginary
array of files.
---
#### `0x0xx` LFS_TYPE_NAME
Associates the id with a file name and file type.
The data contains the file name stored as an ASCII string (may be expanded to
UTF8 in the future).
The chunk field in this tag indicates an 8-bit file type which can be one of
the following.
Currently, the name tag must precede any other tags associated with the id and
can not be reassigned without deleting the file.
Layout of the name tag:
```
tag data
[-- 32 --][--- variable length ---]
[1| 3| 8 | 10 | 10 ][--- (size * 8) ---]
^ ^ ^ ^ ^- size ^- file name
| | | '------ id
| | '----------- file type
| '-------------- type1 (0x0)
'----------------- valid bit
```
Name fields:
1. **file type (8-bits)** - Type of the file.
2. **file name** - File name stored as an ASCII string.
---
#### `0x001` LFS_TYPE_REG
Initializes the id + name as a regular file.
How each file is stored depends on its struct tag, which is described below.
---
#### `0x002` LFS_TYPE_DIR
Initializes the id + name as a directory.
Directories in littlefs are stored on disk as a linked-list of metadata pairs,
each pair containing any number of files in alphabetical order. A pointer to
the directory is stored in the struct tag, which is described below.
---
#### `0x0ff` LFS_TYPE_SUPERBLOCK
Initializes the id as a superblock entry.
The superblock entry is a special entry used to store format-time configuration
and identify the filesystem.
The name is a bit of a misnomer. While the superblock entry serves the same
purpose as a superblock found in other filesystems, in littlefs the superblock
does not get a dedicated block. Instead, the superblock entry is duplicated
across a linked-list of metadata pairs rooted on the blocks 0 and 1. The last
metadata pair doubles as the root directory of the filesystem.
```
.--------. .--------. .--------. .--------. .--------.
.| super |->| super |->| super |->| super |->| file B |
|| block | || block | || block | || block | || file C |
|| | || | || | || file A | || file D |
|'--------' |'--------' |'--------' |'--------' |'--------'
'--------' '--------' '--------' '--------' '--------'
\----------------+----------------/ \----------+----------/
superblock pairs root directory
```
The filesystem starts with only the root directory. The superblock metadata
pairs grow every time the root pair is compacted in order to prolong the
life of the device exponentially.
The contents of the superblock entry are stored in a name tag with the
superblock type and an inline-struct tag. The name tag contains the magic
string "littlefs", while the inline-struct tag contains version and
configuration information.
Layout of the superblock name tag and inline-struct tag:
```
tag data
[-- 32 --][-- 32 --|-- 32 --]
[1|- 11 -| 10 | 10 ][--- 64 ---]
^ ^ ^ ^- size (8) ^- magic string ("littlefs")
| | '------ id (0)
| '------------ type (0x0ff)
'----------------- valid bit
tag data
[-- 32 --][-- 32 --|-- 32 --|-- 32 --]
[1|- 11 -| 10 | 10 ][-- 32 --|-- 32 --|-- 32 --]
^ ^ ^ ^ ^- version ^- block size ^- block count
| | | | [-- 32 --|-- 32 --|-- 32 --]
| | | | [-- 32 --|-- 32 --|-- 32 --]
| | | | ^- name max ^- file max ^- attr max
| | | '- size (24)
| | '------ id (0)
| '------------ type (0x201)
'----------------- valid bit
```
Superblock fields:
1. **Magic string (8-bytes)** - Magic string indicating the presence of
littlefs on the device. Must be the string "littlefs".
2. **Version (32-bits)** - The version of littlefs at format time. The version
is encoded in a 32-bit value with the upper 16-bits containing the major
version, and the lower 16-bits containing the minor version.
This specification describes version 2.0 (`0x00020000`).
3. **Block size (32-bits)** - Size of the logical block size used by the
filesystem in bytes.
4. **Block count (32-bits)** - Number of blocks in the filesystem.
5. **Name max (32-bits)** - Maximum size of file names in bytes.
6. **File max (32-bits)** - Maximum size of files in bytes.
7. **Attr max (32-bits)** - Maximum size of file attributes in bytes.
The superblock must always be the first entry (id 0) in a metadata pair as well
as be the first entry written to the block. This means that the superblock
entry can be read from a device using offsets alone.
---
#### `0x2xx` LFS_TYPE_STRUCT
Associates the id with an on-disk data structure.
The exact layout of the data depends on the data structure type stored in the
chunk field and can be one of the following.
Any type of struct supersedes all other structs associated with the id. For
example, appending a ctz-struct replaces an inline-struct on the same file.
---
#### `0x200` LFS_TYPE_DIRSTRUCT
Gives the id a directory data structure.
Directories in littlefs are stored on disk as a linked-list of metadata pairs,
each pair containing any number of files in alphabetical order.
```
|
v
.--------. .--------. .--------. .--------. .--------. .--------.
.| file A |->| file D |->| file G |->| file I |->| file J |->| file M |
|| file B | || file E | || file H | || | || file K | || file N |
|| file C | || file F | || | || | || file L | || |
|'--------' |'--------' |'--------' |'--------' |'--------' |'--------'
'--------' '--------' '--------' '--------' '--------' '--------'
```
The dir-struct tag contains only the pointer to the first metadata-pair in the
directory. The directory size is not known without traversing the directory.
The pointer to the next metadata-pair in the directory is stored in a tail tag,
which is described below.
Layout of the dir-struct tag:
```
tag data
[-- 32 --][-- 32 --|-- 32 --]
[1|- 11 -| 10 | 10 ][--- 64 ---]
^ ^ ^ ^- size (8) ^- metadata pair
| | '------ id
| '------------ type (0x200)
'----------------- valid bit
```
Dir-struct fields:
1. **Metadata pair (8-bytes)** - Pointer to the first metadata-pair
in the directory.
---
#### `0x201` LFS_TYPE_INLINESTRUCT
Gives the id an inline data structure.
Inline structs store small files that can fit in the metadata pair. In this
case, the file data is stored directly in the tag's data area.
Layout of the inline-struct tag:
```
tag data
[-- 32 --][--- variable length ---]
[1|- 11 -| 10 | 10 ][--- (size * 8) ---]
^ ^ ^ ^- size ^- inline data
| | '------ id
| '------------ type (0x201)
'----------------- valid bit
```
Inline-struct fields:
1. **Inline data** - File data stored directly in the metadata-pair.
---
#### `0x202` LFS_TYPE_CTZSTRUCT
Gives the id a CTZ skip-list data structure.
CTZ skip-lists store files that can not fit in the metadata pair. These files
are stored in a skip-list in reverse, with a pointer to the head of the
skip-list. Note that the head of the skip-list and the file size is enough
information to read the file.
How exactly CTZ skip-lists work is a bit complicated. A full explanation can be
found in the [DESIGN.md](DESIGN.md#ctz-skip-lists).
A quick summary: For every _n_&zwj;th block where _n_ is divisible by
2&zwj;_&#739;_, that block contains a pointer to block _n_-2&zwj;_&#739;_.
These pointers are stored in increasing order of _x_ in each block of the file
before the actual data.
```
|
v
.--------. .--------. .--------. .--------. .--------. .--------.
| A |<-| D |<-| G |<-| J |<-| M |<-| P |
| B |<-| E |--| H |<-| K |--| N | | Q |
| C |<-| F |--| I |--| L |--| O | | |
'--------' '--------' '--------' '--------' '--------' '--------'
block 0 block 1 block 2 block 3 block 4 block 5
1 skip 2 skips 1 skip 3 skips 1 skip
```
Note that the maximum number of pointers in a block is bounded by the maximum
file size divided by the block size. With 32 bits for file size, this results
in a minimum block size of 104 bytes.
Layout of the CTZ-struct tag:
```
tag data
[-- 32 --][-- 32 --|-- 32 --]
[1|- 11 -| 10 | 10 ][-- 32 --|-- 32 --]
^ ^ ^ ^ ^ ^- file size
| | | | '-------------------- file head
| | | '- size (8)
| | '------ id
| '------------ type (0x202)
'----------------- valid bit
```
CTZ-struct fields:
1. **File head (32-bits)** - Pointer to the block that is the head of the
file's CTZ skip-list.
2. **File size (32-bits)** - Size of the file in bytes.
---
#### `0x3xx` LFS_TYPE_USERATTR
Attaches a user attribute to an id.
littlefs has a concept of "user attributes". These are small user-provided
attributes that can be used to store things like timestamps, hashes,
permissions, etc.
Each user attribute is uniquely identified by an 8-bit type which is stored in
the chunk field, and the user attribute itself can be found in the tag's data.
There are currently no standard user attributes and a portable littlefs
implementation should work with any user attributes missing.
Layout of the user-attr tag:
```
tag data
[-- 32 --][--- variable length ---]
[1| 3| 8 | 10 | 10 ][--- (size * 8) ---]
^ ^ ^ ^ ^- size ^- attr data
| | | '------ id
| | '----------- attr type
| '-------------- type1 (0x3)
'----------------- valid bit
```
User-attr fields:
1. **Attr type (8-bits)** - Type of the user attributes.
2. **Attr data** - The data associated with the user attribute.
---
#### `0x6xx` LFS_TYPE_TAIL
Provides the tail pointer for the metadata pair itself.
The metadata pair's tail pointer is used in littlefs for a linked-list
containing all metadata pairs. The chunk field contains the type of the tail,
which indicates if the following metadata pair is a part of the directory
(hard-tail) or only used to traverse the filesystem (soft-tail).
```
.--------.
.| dir A |-.
||softtail| |
.--------| |-'
| |'--------'
| '---|--|-'
| .-' '-------------.
| v v
| .--------. .--------. .--------.
'->| dir B |->| dir B |->| dir C |
||hardtail| ||softtail| || |
|| | || | || |
|'--------' |'--------' |'--------'
'--------' '--------' '--------'
```
Currently any type supersedes any other preceding tails in the metadata pair,
but this may change if additional metadata pair state is added.
A note about the metadata pair linked-list: Normally, this linked-list contains
every metadata pair in the filesystem. However, there are some operations that
can cause this linked-list to become out of sync if a power-loss were to occur.
When this happens, littlefs sets the "sync" flag in the global state. How
exactly this flag is stored is described below.
When the sync flag is set:
1. The linked-list may contain an orphaned directory that has been removed in
the filesystem.
2. The linked-list may contain a metadata pair with a bad block that has been
replaced in the filesystem.
If the sync flag is set, the threaded linked-list must be checked for these
errors before it can be used reliably. Note that the threaded linked-list can
be ignored if littlefs is mounted read-only.
Layout of the tail tag:
```
tag data
[-- 32 --][-- 32 --|-- 32 --]
[1| 3| 8 | 10 | 10 ][--- 64 ---]
^ ^ ^ ^ ^- size (8) ^- metadata pair
| | | '------ id
| | '---------- tail type
| '------------- type1 (0x6)
'---------------- valid bit
```
Tail fields:
1. **Tail type (8-bits)** - Type of the tail pointer.
2. **Metadata pair (8-bytes)** - Pointer to the next metadata-pair.
---
#### `0x600` LFS_TYPE_SOFTTAIL
Provides a tail pointer that points to the next metadata pair in the
filesystem.
In this case, the next metadata pair is not a part of our current directory
and should only be followed when traversing the entire filesystem.
---
#### `0x601` LFS_TYPE_HARDTAIL
Provides a tail pointer that points to the next metadata pair in the
directory.
In this case, the next metadata pair belongs to the current directory. Note
that because directories in littlefs are sorted alphabetically, the next
metadata pair should only contain filenames greater than any filename in the
current pair.
---
#### `0x7xx` LFS_TYPE_GSTATE
Provides delta bits for global state entries.
littlefs has a concept of "global state". This is a small set of state that
can be updated by a commit to _any_ metadata pair in the filesystem.
The way this works is that the global state is stored as a set of deltas
distributed across the filesystem such that the global state can be found by
the xor-sum of these deltas.
```
.--------. .--------. .--------. .--------. .--------.
.| |->| gdelta |->| |->| gdelta |->| gdelta |
|| | || 0x23 | || | || 0xff | || 0xce |
|| | || | || | || | || |
|'--------' |'--------' |'--------' |'--------' |'--------'
'--------' '----|---' '--------' '----|---' '----|---'
v v v
0x00 --> xor ------------------> xor ------> xor --> gstate = 0x12
```
Note that storing globals this way is very expensive in terms of storage usage,
so any global state should be kept very small.
The size and format of each piece of global state depends on the type, which
is stored in the chunk field. Currently, the only global state is move state,
which is outlined below.
---
#### `0x7ff` LFS_TYPE_MOVESTATE
Provides delta bits for the global move state.
The move state in littlefs is used to store info about operations that could
cause to filesystem to go out of sync if the power is lost. The operations
where this could occur is moves of files between metadata pairs and any
operation that changes metadata pairs on the threaded linked-list.
In the case of moves, the move state contains a tag + metadata pair describing
the source of the ongoing move. If this tag is non-zero, that means that power
was lost during a move, and the file exists in two different locations. If this
happens, the source of the move should be considered deleted, and the move
should be completed (the source should be deleted) before any other write
operations to the filesystem.
In the case of operations to the threaded linked-list, a single "sync" bit is
used to indicate that a modification is ongoing. If this sync flag is set, the
threaded linked-list will need to be checked for errors before it can be used
reliably. The exact cases to check for are described above in the tail tag.
Layout of the move state:
```
tag data
[-- 32 --][-- 32 --|-- 32 --|-- 32 --]
[1|- 11 -| 10 | 10 ][1|- 11 -| 10 | 10 |--- 64 ---]
^ ^ ^ ^ ^ ^ ^ ^- padding (0) ^- metadata pair
| | | | | | '------ move id
| | | | | '------------ move type
| | | | '----------------- sync bit
| | | |
| | | '- size (12)
| | '------ id (0x3ff)
| '------------ type (0x7ff)
'----------------- valid bit
```
Move state fields:
1. **Sync bit (1-bit)** - Indicates if the metadata pair threaded linked-list
is in-sync. If set, the threaded linked-list should be checked for errors.
2. **Move type (11-bits)** - Type of move being performed. Must be either
`0x000`, indicating no move, or `0x4ff` indicating the source file should
be deleted.
3. **Move id (10-bits)** - The file id being moved.
4. **Metadata pair (8-bytes)** - Pointer to the metadata-pair containing
the move.
---
#### `0x5xx` LFS_TYPE_CRC
Last but not least, the CRC tag marks the end of a commit and provides a
checksum for any commits to the metadata block.
The first 32-bits of the data contain a CRC-32 with a polynomial of
`0x04c11db7` initialized with `0xffffffff`. This CRC provides a checksum for
all metadata since the previous CRC tag, including the CRC tag itself. For
the first commit, this includes the revision count for the metadata block.
However, the size of the data is not limited to 32-bits. The data field may
larger to pad the commit to the next program-aligned boundary.
In addition, the CRC tag's chunk field contains a set of flags which can
change the behaviour of commits. Currently the only flag in use is the lowest
bit, which determines the expected state of the valid bit for any following
tags. This is used to guarantee that unwritten storage in a metadata block
will be detected as invalid.
Layout of the CRC tag:
```
tag data
[-- 32 --][-- 32 --|--- variable length ---]
[1| 3| 8 | 10 | 10 ][-- 32 --|--- (size * 8 - 32) ---]
^ ^ ^ ^ ^ ^- crc ^- padding
| | | | '- size
| | | '------ id (0x3ff)
| | '----------- valid state
| '-------------- type1 (0x5)
'----------------- valid bit
```
CRC fields:
1. **Valid state (1-bit)** - Indicates the expected value of the valid bit for
any tags in the next commit.
2. **CRC (32-bits)** - CRC-32 with a polynomial of `0x04c11db7` initialized
with `0xffffffff`.
3. **Padding** - Padding to the next program-aligned boundary. No guarantees
are made about the contents.
---

219
components/fs/littlefs/littlefs/bd/lfs_filebd.c Normal file
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@ -0,0 +1,219 @@
/*
* Block device emulated in a file
*
* Copyright (c) 2022, The littlefs authors.
* Copyright (c) 2017, Arm Limited. All rights reserved.
* SPDX-License-Identifier: BSD-3-Clause
*/
#include "bd/lfs_filebd.h"
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#ifdef _WIN32
#include <windows.h>
#endif
int lfs_filebd_createcfg(const struct lfs_config *cfg, const char *path,
const struct lfs_filebd_config *bdcfg) {
LFS_FILEBD_TRACE("lfs_filebd_createcfg(%p {.context=%p, "
".read=%p, .prog=%p, .erase=%p, .sync=%p, "
".read_size=%"PRIu32", .prog_size=%"PRIu32", "
".block_size=%"PRIu32", .block_count=%"PRIu32"}, "
"\"%s\", "
"%p {.erase_value=%"PRId32"})",
(void*)cfg, cfg->context,
(void*)(uintptr_t)cfg->read, (void*)(uintptr_t)cfg->prog,
(void*)(uintptr_t)cfg->erase, (void*)(uintptr_t)cfg->sync,
cfg->read_size, cfg->prog_size, cfg->block_size, cfg->block_count,
path, (void*)bdcfg, bdcfg->erase_value);
lfs_filebd_t *bd = cfg->context;
bd->cfg = bdcfg;
// open file
#ifdef _WIN32
bd->fd = open(path, O_RDWR | O_CREAT | O_BINARY, 0666);
#else
bd->fd = open(path, O_RDWR | O_CREAT, 0666);
#endif
if (bd->fd < 0) {
int err = -errno;
LFS_FILEBD_TRACE("lfs_filebd_createcfg -> %d", err);
return err;
}
LFS_FILEBD_TRACE("lfs_filebd_createcfg -> %d", 0);
return 0;
}
int lfs_filebd_create(const struct lfs_config *cfg, const char *path) {
LFS_FILEBD_TRACE("lfs_filebd_create(%p {.context=%p, "
".read=%p, .prog=%p, .erase=%p, .sync=%p, "
".read_size=%"PRIu32", .prog_size=%"PRIu32", "
".block_size=%"PRIu32", .block_count=%"PRIu32"}, "
"\"%s\")",
(void*)cfg, cfg->context,
(void*)(uintptr_t)cfg->read, (void*)(uintptr_t)cfg->prog,
(void*)(uintptr_t)cfg->erase, (void*)(uintptr_t)cfg->sync,
cfg->read_size, cfg->prog_size, cfg->block_size, cfg->block_count,
path);
static const struct lfs_filebd_config defaults = {.erase_value=-1};
int err = lfs_filebd_createcfg(cfg, path, &defaults);
LFS_FILEBD_TRACE("lfs_filebd_create -> %d", err);
return err;
}
int lfs_filebd_destroy(const struct lfs_config *cfg) {
LFS_FILEBD_TRACE("lfs_filebd_destroy(%p)", (void*)cfg);
lfs_filebd_t *bd = cfg->context;
int err = close(bd->fd);
if (err < 0) {
err = -errno;
LFS_FILEBD_TRACE("lfs_filebd_destroy -> %d", err);
return err;
}
LFS_FILEBD_TRACE("lfs_filebd_destroy -> %d", 0);
return 0;
}
int lfs_filebd_read(const struct lfs_config *cfg, lfs_block_t block,
lfs_off_t off, void *buffer, lfs_size_t size) {
LFS_FILEBD_TRACE("lfs_filebd_read(%p, "
"0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
(void*)cfg, block, off, buffer, size);
lfs_filebd_t *bd = cfg->context;
// check if read is valid
LFS_ASSERT(off % cfg->read_size == 0);
LFS_ASSERT(size % cfg->read_size == 0);
LFS_ASSERT(block < cfg->block_count);
// zero for reproducibility (in case file is truncated)
if (bd->cfg->erase_value != -1) {
memset(buffer, bd->cfg->erase_value, size);
}
// read
off_t res1 = lseek(bd->fd,
(off_t)block*cfg->block_size + (off_t)off, SEEK_SET);
if (res1 < 0) {
int err = -errno;
LFS_FILEBD_TRACE("lfs_filebd_read -> %d", err);
return err;
}
ssize_t res2 = read(bd->fd, buffer, size);
if (res2 < 0) {
int err = -errno;
LFS_FILEBD_TRACE("lfs_filebd_read -> %d", err);
return err;
}
LFS_FILEBD_TRACE("lfs_filebd_read -> %d", 0);
return 0;
}
int lfs_filebd_prog(const struct lfs_config *cfg, lfs_block_t block,
lfs_off_t off, const void *buffer, lfs_size_t size) {
LFS_FILEBD_TRACE("lfs_filebd_prog(%p, 0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
(void*)cfg, block, off, buffer, size);
lfs_filebd_t *bd = cfg->context;
// check if write is valid
LFS_ASSERT(off % cfg->prog_size == 0);
LFS_ASSERT(size % cfg->prog_size == 0);
LFS_ASSERT(block < cfg->block_count);
// check that data was erased? only needed for testing
if (bd->cfg->erase_value != -1) {
off_t res1 = lseek(bd->fd,
(off_t)block*cfg->block_size + (off_t)off, SEEK_SET);
if (res1 < 0) {
int err = -errno;
LFS_FILEBD_TRACE("lfs_filebd_prog -> %d", err);
return err;
}
for (lfs_off_t i = 0; i < size; i++) {
uint8_t c;
ssize_t res2 = read(bd->fd, &c, 1);
if (res2 < 0) {
int err = -errno;
LFS_FILEBD_TRACE("lfs_filebd_prog -> %d", err);
return err;
}
LFS_ASSERT(c == bd->cfg->erase_value);
}
}
// program data
off_t res1 = lseek(bd->fd,
(off_t)block*cfg->block_size + (off_t)off, SEEK_SET);
if (res1 < 0) {
int err = -errno;
LFS_FILEBD_TRACE("lfs_filebd_prog -> %d", err);
return err;
}
ssize_t res2 = write(bd->fd, buffer, size);
if (res2 < 0) {
int err = -errno;
LFS_FILEBD_TRACE("lfs_filebd_prog -> %d", err);
return err;
}
LFS_FILEBD_TRACE("lfs_filebd_prog -> %d", 0);
return 0;
}
int lfs_filebd_erase(const struct lfs_config *cfg, lfs_block_t block) {
LFS_FILEBD_TRACE("lfs_filebd_erase(%p, 0x%"PRIx32")", (void*)cfg, block);
lfs_filebd_t *bd = cfg->context;
// check if erase is valid
LFS_ASSERT(block < cfg->block_count);
// erase, only needed for testing
if (bd->cfg->erase_value != -1) {
off_t res1 = lseek(bd->fd, (off_t)block*cfg->block_size, SEEK_SET);
if (res1 < 0) {
int err = -errno;
LFS_FILEBD_TRACE("lfs_filebd_erase -> %d", err);
return err;
}
for (lfs_off_t i = 0; i < cfg->block_size; i++) {
ssize_t res2 = write(bd->fd, &(uint8_t){bd->cfg->erase_value}, 1);
if (res2 < 0) {
int err = -errno;
LFS_FILEBD_TRACE("lfs_filebd_erase -> %d", err);
return err;
}
}
}
LFS_FILEBD_TRACE("lfs_filebd_erase -> %d", 0);
return 0;
}
int lfs_filebd_sync(const struct lfs_config *cfg) {
LFS_FILEBD_TRACE("lfs_filebd_sync(%p)", (void*)cfg);
// file sync
lfs_filebd_t *bd = cfg->context;
#ifdef _WIN32
int err = FlushFileBuffers((HANDLE) _get_osfhandle(bd->fd)) ? 0 : -1;
#else
int err = fsync(bd->fd);
#endif
if (err) {
err = -errno;
LFS_FILEBD_TRACE("lfs_filebd_sync -> %d", 0);
return err;
}
LFS_FILEBD_TRACE("lfs_filebd_sync -> %d", 0);
return 0;
}

74
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/*
* Block device emulated in a file
*
* Copyright (c) 2022, The littlefs authors.
* Copyright (c) 2017, Arm Limited. All rights reserved.
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef LFS_FILEBD_H
#define LFS_FILEBD_H
#include "lfs.h"
#include "lfs_util.h"
#ifdef __cplusplus
extern "C"
{
#endif
// Block device specific tracing
#ifdef LFS_FILEBD_YES_TRACE
#define LFS_FILEBD_TRACE(...) LFS_TRACE(__VA_ARGS__)
#else
#define LFS_FILEBD_TRACE(...)
#endif
// filebd config (optional)
struct lfs_filebd_config {
// 8-bit erase value to use for simulating erases. -1 does not simulate
// erases, which can speed up testing by avoiding all the extra block-device
// operations to store the erase value.
int32_t erase_value;
};
// filebd state
typedef struct lfs_filebd {
int fd;
const struct lfs_filebd_config *cfg;
} lfs_filebd_t;
// Create a file block device using the geometry in lfs_config
int lfs_filebd_create(const struct lfs_config *cfg, const char *path);
int lfs_filebd_createcfg(const struct lfs_config *cfg, const char *path,
const struct lfs_filebd_config *bdcfg);
// Clean up memory associated with block device
int lfs_filebd_destroy(const struct lfs_config *cfg);
// Read a block
int lfs_filebd_read(const struct lfs_config *cfg, lfs_block_t block,
lfs_off_t off, void *buffer, lfs_size_t size);
// Program a block
//
// The block must have previously been erased.
int lfs_filebd_prog(const struct lfs_config *cfg, lfs_block_t block,
lfs_off_t off, const void *buffer, lfs_size_t size);
// Erase a block
//
// A block must be erased before being programmed. The
// state of an erased block is undefined.
int lfs_filebd_erase(const struct lfs_config *cfg, lfs_block_t block);
// Sync the block device
int lfs_filebd_sync(const struct lfs_config *cfg);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif

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/*
* Block device emulated in RAM
*
* Copyright (c) 2022, The littlefs authors.
* Copyright (c) 2017, Arm Limited. All rights reserved.
* SPDX-License-Identifier: BSD-3-Clause
*/
#include "bd/lfs_rambd.h"
int lfs_rambd_createcfg(const struct lfs_config *cfg,
const struct lfs_rambd_config *bdcfg) {
LFS_RAMBD_TRACE("lfs_rambd_createcfg(%p {.context=%p, "
".read=%p, .prog=%p, .erase=%p, .sync=%p, "
".read_size=%"PRIu32", .prog_size=%"PRIu32", "
".block_size=%"PRIu32", .block_count=%"PRIu32"}, "
"%p {.erase_value=%"PRId32", .buffer=%p})",
(void*)cfg, cfg->context,
(void*)(uintptr_t)cfg->read, (void*)(uintptr_t)cfg->prog,
(void*)(uintptr_t)cfg->erase, (void*)(uintptr_t)cfg->sync,
cfg->read_size, cfg->prog_size, cfg->block_size, cfg->block_count,
(void*)bdcfg, bdcfg->erase_value, bdcfg->buffer);
lfs_rambd_t *bd = cfg->context;
bd->cfg = bdcfg;
// allocate buffer?
if (bd->cfg->buffer) {
bd->buffer = bd->cfg->buffer;
} else {
bd->buffer = lfs_malloc(cfg->block_size * cfg->block_count);
if (!bd->buffer) {
LFS_RAMBD_TRACE("lfs_rambd_createcfg -> %d", LFS_ERR_NOMEM);
return LFS_ERR_NOMEM;
}
}
// zero for reproducibility?
if (bd->cfg->erase_value != -1) {
memset(bd->buffer, bd->cfg->erase_value,
cfg->block_size * cfg->block_count);
} else {
memset(bd->buffer, 0, cfg->block_size * cfg->block_count);
}
LFS_RAMBD_TRACE("lfs_rambd_createcfg -> %d", 0);
return 0;
}
int lfs_rambd_create(const struct lfs_config *cfg) {
LFS_RAMBD_TRACE("lfs_rambd_create(%p {.context=%p, "
".read=%p, .prog=%p, .erase=%p, .sync=%p, "
".read_size=%"PRIu32", .prog_size=%"PRIu32", "
".block_size=%"PRIu32", .block_count=%"PRIu32"})",
(void*)cfg, cfg->context,
(void*)(uintptr_t)cfg->read, (void*)(uintptr_t)cfg->prog,
(void*)(uintptr_t)cfg->erase, (void*)(uintptr_t)cfg->sync,
cfg->read_size, cfg->prog_size, cfg->block_size, cfg->block_count);
static const struct lfs_rambd_config defaults = {.erase_value=-1};
int err = lfs_rambd_createcfg(cfg, &defaults);
LFS_RAMBD_TRACE("lfs_rambd_create -> %d", err);
return err;
}
int lfs_rambd_destroy(const struct lfs_config *cfg) {
LFS_RAMBD_TRACE("lfs_rambd_destroy(%p)", (void*)cfg);
// clean up memory
lfs_rambd_t *bd = cfg->context;
if (!bd->cfg->buffer) {
lfs_free(bd->buffer);
}
LFS_RAMBD_TRACE("lfs_rambd_destroy -> %d", 0);
return 0;
}
int lfs_rambd_read(const struct lfs_config *cfg, lfs_block_t block,
lfs_off_t off, void *buffer, lfs_size_t size) {
LFS_RAMBD_TRACE("lfs_rambd_read(%p, "
"0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
(void*)cfg, block, off, buffer, size);
lfs_rambd_t *bd = cfg->context;
// check if read is valid
LFS_ASSERT(off % cfg->read_size == 0);
LFS_ASSERT(size % cfg->read_size == 0);
LFS_ASSERT(block < cfg->block_count);
// read data
memcpy(buffer, &bd->buffer[block*cfg->block_size + off], size);
LFS_RAMBD_TRACE("lfs_rambd_read -> %d", 0);
return 0;
}
int lfs_rambd_prog(const struct lfs_config *cfg, lfs_block_t block,
lfs_off_t off, const void *buffer, lfs_size_t size) {
LFS_RAMBD_TRACE("lfs_rambd_prog(%p, "
"0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
(void*)cfg, block, off, buffer, size);
lfs_rambd_t *bd = cfg->context;
// check if write is valid
LFS_ASSERT(off % cfg->prog_size == 0);
LFS_ASSERT(size % cfg->prog_size == 0);
LFS_ASSERT(block < cfg->block_count);
// check that data was erased? only needed for testing
if (bd->cfg->erase_value != -1) {
for (lfs_off_t i = 0; i < size; i++) {
LFS_ASSERT(bd->buffer[block*cfg->block_size + off + i] ==
bd->cfg->erase_value);
}
}
// program data
memcpy(&bd->buffer[block*cfg->block_size + off], buffer, size);
LFS_RAMBD_TRACE("lfs_rambd_prog -> %d", 0);
return 0;
}
int lfs_rambd_erase(const struct lfs_config *cfg, lfs_block_t block) {
LFS_RAMBD_TRACE("lfs_rambd_erase(%p, 0x%"PRIx32")", (void*)cfg, block);
lfs_rambd_t *bd = cfg->context;
// check if erase is valid
LFS_ASSERT(block < cfg->block_count);
// erase, only needed for testing
if (bd->cfg->erase_value != -1) {
memset(&bd->buffer[block*cfg->block_size],
bd->cfg->erase_value, cfg->block_size);
}
LFS_RAMBD_TRACE("lfs_rambd_erase -> %d", 0);
return 0;
}
int lfs_rambd_sync(const struct lfs_config *cfg) {
LFS_RAMBD_TRACE("lfs_rambd_sync(%p)", (void*)cfg);
// sync does nothing because we aren't backed by anything real
(void)cfg;
LFS_RAMBD_TRACE("lfs_rambd_sync -> %d", 0);
return 0;
}

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/*
* Block device emulated in RAM
*
* Copyright (c) 2022, The littlefs authors.
* Copyright (c) 2017, Arm Limited. All rights reserved.
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef LFS_RAMBD_H
#define LFS_RAMBD_H
#include "lfs.h"
#include "lfs_util.h"
#ifdef __cplusplus
extern "C"
{
#endif
// Block device specific tracing
#ifdef LFS_RAMBD_YES_TRACE
#define LFS_RAMBD_TRACE(...) LFS_TRACE(__VA_ARGS__)
#else
#define LFS_RAMBD_TRACE(...)
#endif
// rambd config (optional)
struct lfs_rambd_config {
// 8-bit erase value to simulate erasing with. -1 indicates no erase
// occurs, which is still a valid block device
int32_t erase_value;
// Optional statically allocated buffer for the block device.
void *buffer;
};
// rambd state
typedef struct lfs_rambd {
uint8_t *buffer;
const struct lfs_rambd_config *cfg;
} lfs_rambd_t;
// Create a RAM block device using the geometry in lfs_config
int lfs_rambd_create(const struct lfs_config *cfg);
int lfs_rambd_createcfg(const struct lfs_config *cfg,
const struct lfs_rambd_config *bdcfg);
// Clean up memory associated with block device
int lfs_rambd_destroy(const struct lfs_config *cfg);
// Read a block
int lfs_rambd_read(const struct lfs_config *cfg, lfs_block_t block,
lfs_off_t off, void *buffer, lfs_size_t size);
// Program a block
//
// The block must have previously been erased.
int lfs_rambd_prog(const struct lfs_config *cfg, lfs_block_t block,
lfs_off_t off, const void *buffer, lfs_size_t size);
// Erase a block
//
// A block must be erased before being programmed. The
// state of an erased block is undefined.
int lfs_rambd_erase(const struct lfs_config *cfg, lfs_block_t block);
// Sync the block device
int lfs_rambd_sync(const struct lfs_config *cfg);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif

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/*
* Testing block device, wraps filebd and rambd while providing a bunch
* of hooks for testing littlefs in various conditions.
*
* Copyright (c) 2022, The littlefs authors.
* Copyright (c) 2017, Arm Limited. All rights reserved.
* SPDX-License-Identifier: BSD-3-Clause
*/
#include "bd/lfs_testbd.h"
#include <stdlib.h>
int lfs_testbd_createcfg(const struct lfs_config *cfg, const char *path,
const struct lfs_testbd_config *bdcfg) {
LFS_TESTBD_TRACE("lfs_testbd_createcfg(%p {.context=%p, "
".read=%p, .prog=%p, .erase=%p, .sync=%p, "
".read_size=%"PRIu32", .prog_size=%"PRIu32", "
".block_size=%"PRIu32", .block_count=%"PRIu32"}, "
"\"%s\", "
"%p {.erase_value=%"PRId32", .erase_cycles=%"PRIu32", "
".badblock_behavior=%"PRIu8", .power_cycles=%"PRIu32", "
".buffer=%p, .wear_buffer=%p})",
(void*)cfg, cfg->context,
(void*)(uintptr_t)cfg->read, (void*)(uintptr_t)cfg->prog,
(void*)(uintptr_t)cfg->erase, (void*)(uintptr_t)cfg->sync,
cfg->read_size, cfg->prog_size, cfg->block_size, cfg->block_count,
path, (void*)bdcfg, bdcfg->erase_value, bdcfg->erase_cycles,
bdcfg->badblock_behavior, bdcfg->power_cycles,
bdcfg->buffer, bdcfg->wear_buffer);
lfs_testbd_t *bd = cfg->context;
bd->cfg = bdcfg;
// setup testing things
bd->persist = path;
bd->power_cycles = bd->cfg->power_cycles;
if (bd->cfg->erase_cycles) {
if (bd->cfg->wear_buffer) {
bd->wear = bd->cfg->wear_buffer;
} else {
bd->wear = lfs_malloc(sizeof(lfs_testbd_wear_t)*cfg->block_count);
if (!bd->wear) {
LFS_TESTBD_TRACE("lfs_testbd_createcfg -> %d", LFS_ERR_NOMEM);
return LFS_ERR_NOMEM;
}
}
memset(bd->wear, 0, sizeof(lfs_testbd_wear_t) * cfg->block_count);
}
// create underlying block device
if (bd->persist) {
bd->u.file.cfg = (struct lfs_filebd_config){
.erase_value = bd->cfg->erase_value,
};
int err = lfs_filebd_createcfg(cfg, path, &bd->u.file.cfg);
LFS_TESTBD_TRACE("lfs_testbd_createcfg -> %d", err);
return err;
} else {
bd->u.ram.cfg = (struct lfs_rambd_config){
.erase_value = bd->cfg->erase_value,
.buffer = bd->cfg->buffer,
};
int err = lfs_rambd_createcfg(cfg, &bd->u.ram.cfg);
LFS_TESTBD_TRACE("lfs_testbd_createcfg -> %d", err);
return err;
}
}
int lfs_testbd_create(const struct lfs_config *cfg, const char *path) {
LFS_TESTBD_TRACE("lfs_testbd_create(%p {.context=%p, "
".read=%p, .prog=%p, .erase=%p, .sync=%p, "
".read_size=%"PRIu32", .prog_size=%"PRIu32", "
".block_size=%"PRIu32", .block_count=%"PRIu32"}, "
"\"%s\")",
(void*)cfg, cfg->context,
(void*)(uintptr_t)cfg->read, (void*)(uintptr_t)cfg->prog,
(void*)(uintptr_t)cfg->erase, (void*)(uintptr_t)cfg->sync,
cfg->read_size, cfg->prog_size, cfg->block_size, cfg->block_count,
path);
static const struct lfs_testbd_config defaults = {.erase_value=-1};
int err = lfs_testbd_createcfg(cfg, path, &defaults);
LFS_TESTBD_TRACE("lfs_testbd_create -> %d", err);
return err;
}
int lfs_testbd_destroy(const struct lfs_config *cfg) {
LFS_TESTBD_TRACE("lfs_testbd_destroy(%p)", (void*)cfg);
lfs_testbd_t *bd = cfg->context;
if (bd->cfg->erase_cycles && !bd->cfg->wear_buffer) {
lfs_free(bd->wear);
}
if (bd->persist) {
int err = lfs_filebd_destroy(cfg);
LFS_TESTBD_TRACE("lfs_testbd_destroy -> %d", err);
return err;
} else {
int err = lfs_rambd_destroy(cfg);
LFS_TESTBD_TRACE("lfs_testbd_destroy -> %d", err);
return err;
}
}
/// Internal mapping to block devices ///
static int lfs_testbd_rawread(const struct lfs_config *cfg, lfs_block_t block,
lfs_off_t off, void *buffer, lfs_size_t size) {
lfs_testbd_t *bd = cfg->context;
if (bd->persist) {
return lfs_filebd_read(cfg, block, off, buffer, size);
} else {
return lfs_rambd_read(cfg, block, off, buffer, size);
}
}
static int lfs_testbd_rawprog(const struct lfs_config *cfg, lfs_block_t block,
lfs_off_t off, const void *buffer, lfs_size_t size) {
lfs_testbd_t *bd = cfg->context;
if (bd->persist) {
return lfs_filebd_prog(cfg, block, off, buffer, size);
} else {
return lfs_rambd_prog(cfg, block, off, buffer, size);
}
}
static int lfs_testbd_rawerase(const struct lfs_config *cfg,
lfs_block_t block) {
lfs_testbd_t *bd = cfg->context;
if (bd->persist) {
return lfs_filebd_erase(cfg, block);
} else {
return lfs_rambd_erase(cfg, block);
}
}
static int lfs_testbd_rawsync(const struct lfs_config *cfg) {
lfs_testbd_t *bd = cfg->context;
if (bd->persist) {
return lfs_filebd_sync(cfg);
} else {
return lfs_rambd_sync(cfg);
}
}
/// block device API ///
int lfs_testbd_read(const struct lfs_config *cfg, lfs_block_t block,
lfs_off_t off, void *buffer, lfs_size_t size) {
LFS_TESTBD_TRACE("lfs_testbd_read(%p, "
"0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
(void*)cfg, block, off, buffer, size);
lfs_testbd_t *bd = cfg->context;
// check if read is valid
LFS_ASSERT(off % cfg->read_size == 0);
LFS_ASSERT(size % cfg->read_size == 0);
LFS_ASSERT(block < cfg->block_count);
// block bad?
if (bd->cfg->erase_cycles && bd->wear[block] >= bd->cfg->erase_cycles &&
bd->cfg->badblock_behavior == LFS_TESTBD_BADBLOCK_READERROR) {
LFS_TESTBD_TRACE("lfs_testbd_read -> %d", LFS_ERR_CORRUPT);
return LFS_ERR_CORRUPT;
}
// read
int err = lfs_testbd_rawread(cfg, block, off, buffer, size);
LFS_TESTBD_TRACE("lfs_testbd_read -> %d", err);
return err;
}
int lfs_testbd_prog(const struct lfs_config *cfg, lfs_block_t block,
lfs_off_t off, const void *buffer, lfs_size_t size) {
LFS_TESTBD_TRACE("lfs_testbd_prog(%p, "
"0x%"PRIx32", %"PRIu32", %p, %"PRIu32")",
(void*)cfg, block, off, buffer, size);
lfs_testbd_t *bd = cfg->context;
// check if write is valid
LFS_ASSERT(off % cfg->prog_size == 0);
LFS_ASSERT(size % cfg->prog_size == 0);
LFS_ASSERT(block < cfg->block_count);
// block bad?
if (bd->cfg->erase_cycles && bd->wear[block] >= bd->cfg->erase_cycles) {
if (bd->cfg->badblock_behavior ==
LFS_TESTBD_BADBLOCK_PROGERROR) {
LFS_TESTBD_TRACE("lfs_testbd_prog -> %d", LFS_ERR_CORRUPT);
return LFS_ERR_CORRUPT;
} else if (bd->cfg->badblock_behavior ==
LFS_TESTBD_BADBLOCK_PROGNOOP ||
bd->cfg->badblock_behavior ==
LFS_TESTBD_BADBLOCK_ERASENOOP) {
LFS_TESTBD_TRACE("lfs_testbd_prog -> %d", 0);
return 0;
}
}
// prog
int err = lfs_testbd_rawprog(cfg, block, off, buffer, size);
if (err) {
LFS_TESTBD_TRACE("lfs_testbd_prog -> %d", err);
return err;
}
// lose power?
if (bd->power_cycles > 0) {
bd->power_cycles -= 1;
if (bd->power_cycles == 0) {
// sync to make sure we persist the last changes
LFS_ASSERT(lfs_testbd_rawsync(cfg) == 0);
// simulate power loss
exit(33);
}
}
LFS_TESTBD_TRACE("lfs_testbd_prog -> %d", 0);
return 0;
}
int lfs_testbd_erase(const struct lfs_config *cfg, lfs_block_t block) {
LFS_TESTBD_TRACE("lfs_testbd_erase(%p, 0x%"PRIx32")", (void*)cfg, block);
lfs_testbd_t *bd = cfg->context;
// check if erase is valid
LFS_ASSERT(block < cfg->block_count);
// block bad?
if (bd->cfg->erase_cycles) {
if (bd->wear[block] >= bd->cfg->erase_cycles) {
if (bd->cfg->badblock_behavior ==
LFS_TESTBD_BADBLOCK_ERASEERROR) {
LFS_TESTBD_TRACE("lfs_testbd_erase -> %d", LFS_ERR_CORRUPT);
return LFS_ERR_CORRUPT;
} else if (bd->cfg->badblock_behavior ==
LFS_TESTBD_BADBLOCK_ERASENOOP) {
LFS_TESTBD_TRACE("lfs_testbd_erase -> %d", 0);
return 0;
}
} else {
// mark wear
bd->wear[block] += 1;
}
}
// erase
int err = lfs_testbd_rawerase(cfg, block);
if (err) {
LFS_TESTBD_TRACE("lfs_testbd_erase -> %d", err);
return err;
}
// lose power?
if (bd->power_cycles > 0) {
bd->power_cycles -= 1;
if (bd->power_cycles == 0) {
// sync to make sure we persist the last changes
LFS_ASSERT(lfs_testbd_rawsync(cfg) == 0);
// simulate power loss
exit(33);
}
}
LFS_TESTBD_TRACE("lfs_testbd_prog -> %d", 0);
return 0;
}
int lfs_testbd_sync(const struct lfs_config *cfg) {
LFS_TESTBD_TRACE("lfs_testbd_sync(%p)", (void*)cfg);
int err = lfs_testbd_rawsync(cfg);
LFS_TESTBD_TRACE("lfs_testbd_sync -> %d", err);
return err;
}
/// simulated wear operations ///
lfs_testbd_swear_t lfs_testbd_getwear(const struct lfs_config *cfg,
lfs_block_t block) {
LFS_TESTBD_TRACE("lfs_testbd_getwear(%p, %"PRIu32")", (void*)cfg, block);
lfs_testbd_t *bd = cfg->context;
// check if block is valid
LFS_ASSERT(bd->cfg->erase_cycles);
LFS_ASSERT(block < cfg->block_count);
LFS_TESTBD_TRACE("lfs_testbd_getwear -> %"PRIu32, bd->wear[block]);
return bd->wear[block];
}
int lfs_testbd_setwear(const struct lfs_config *cfg,
lfs_block_t block, lfs_testbd_wear_t wear) {
LFS_TESTBD_TRACE("lfs_testbd_setwear(%p, %"PRIu32")", (void*)cfg, block);
lfs_testbd_t *bd = cfg->context;
// check if block is valid
LFS_ASSERT(bd->cfg->erase_cycles);
LFS_ASSERT(block < cfg->block_count);
bd->wear[block] = wear;
LFS_TESTBD_TRACE("lfs_testbd_setwear -> %d", 0);
return 0;
}

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/*
* Testing block device, wraps filebd and rambd while providing a bunch
* of hooks for testing littlefs in various conditions.
*
* Copyright (c) 2022, The littlefs authors.
* Copyright (c) 2017, Arm Limited. All rights reserved.
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef LFS_TESTBD_H
#define LFS_TESTBD_H
#include "lfs.h"
#include "lfs_util.h"
#include "bd/lfs_rambd.h"
#include "bd/lfs_filebd.h"
#ifdef __cplusplus
extern "C"
{
#endif
// Block device specific tracing
#ifdef LFS_TESTBD_YES_TRACE
#define LFS_TESTBD_TRACE(...) LFS_TRACE(__VA_ARGS__)
#else
#define LFS_TESTBD_TRACE(...)
#endif
// Mode determining how "bad blocks" behave during testing. This simulates
// some real-world circumstances such as progs not sticking (prog-noop),
// a readonly disk (erase-noop), and ECC failures (read-error).
//
// Not that read-noop is not allowed. Read _must_ return a consistent (but
// may be arbitrary) value on every read.
enum lfs_testbd_badblock_behavior {
LFS_TESTBD_BADBLOCK_PROGERROR,
LFS_TESTBD_BADBLOCK_ERASEERROR,
LFS_TESTBD_BADBLOCK_READERROR,
LFS_TESTBD_BADBLOCK_PROGNOOP,
LFS_TESTBD_BADBLOCK_ERASENOOP,
};
// Type for measuring wear
typedef uint32_t lfs_testbd_wear_t;
typedef int32_t lfs_testbd_swear_t;
// testbd config, this is required for testing
struct lfs_testbd_config {
// 8-bit erase value to use for simulating erases. -1 does not simulate
// erases, which can speed up testing by avoiding all the extra block-device
// operations to store the erase value.
int32_t erase_value;
// Number of erase cycles before a block becomes "bad". The exact behavior
// of bad blocks is controlled by the badblock_mode.
uint32_t erase_cycles;
// The mode determining how bad blocks fail
uint8_t badblock_behavior;
// Number of write operations (erase/prog) before forcefully killing
// the program with exit. Simulates power-loss. 0 disables.
uint32_t power_cycles;
// Optional buffer for RAM block device.
void *buffer;
// Optional buffer for wear
void *wear_buffer;
};
// testbd state
typedef struct lfs_testbd {
union {
struct {
lfs_filebd_t bd;
struct lfs_filebd_config cfg;
} file;
struct {
lfs_rambd_t bd;
struct lfs_rambd_config cfg;
} ram;
} u;
bool persist;
uint32_t power_cycles;
lfs_testbd_wear_t *wear;
const struct lfs_testbd_config *cfg;
} lfs_testbd_t;
/// Block device API ///
// Create a test block device using the geometry in lfs_config
//
// Note that filebd is used if a path is provided, if path is NULL
// testbd will use rambd which can be much faster.
int lfs_testbd_create(const struct lfs_config *cfg, const char *path);
int lfs_testbd_createcfg(const struct lfs_config *cfg, const char *path,
const struct lfs_testbd_config *bdcfg);
// Clean up memory associated with block device
int lfs_testbd_destroy(const struct lfs_config *cfg);
// Read a block
int lfs_testbd_read(const struct lfs_config *cfg, lfs_block_t block,
lfs_off_t off, void *buffer, lfs_size_t size);
// Program a block
//
// The block must have previously been erased.
int lfs_testbd_prog(const struct lfs_config *cfg, lfs_block_t block,
lfs_off_t off, const void *buffer, lfs_size_t size);
// Erase a block
//
// A block must be erased before being programmed. The
// state of an erased block is undefined.
int lfs_testbd_erase(const struct lfs_config *cfg, lfs_block_t block);
// Sync the block device
int lfs_testbd_sync(const struct lfs_config *cfg);
/// Additional extended API for driving test features ///
// Get simulated wear on a given block
lfs_testbd_swear_t lfs_testbd_getwear(const struct lfs_config *cfg,
lfs_block_t block);
// Manually set simulated wear on a given block
int lfs_testbd_setwear(const struct lfs_config *cfg,
lfs_block_t block, lfs_testbd_wear_t wear);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif

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/*
* The little filesystem
*
* Copyright (c) 2022, The littlefs authors.
* Copyright (c) 2017, Arm Limited. All rights reserved.
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef LFS_H
#define LFS_H
#include <stdint.h>
#include <stdbool.h>
#include "lfs_util.h"
#ifdef __cplusplus
extern "C"
{
#endif
/// Version info ///
// Software library version
// Major (top-nibble), incremented on backwards incompatible changes
// Minor (bottom-nibble), incremented on feature additions
#define LFS_VERSION 0x00020005
#define LFS_VERSION_MAJOR (0xffff & (LFS_VERSION >> 16))
#define LFS_VERSION_MINOR (0xffff & (LFS_VERSION >> 0))
// Version of On-disk data structures
// Major (top-nibble), incremented on backwards incompatible changes
// Minor (bottom-nibble), incremented on feature additions
#define LFS_DISK_VERSION 0x00020000
#define LFS_DISK_VERSION_MAJOR (0xffff & (LFS_DISK_VERSION >> 16))
#define LFS_DISK_VERSION_MINOR (0xffff & (LFS_DISK_VERSION >> 0))
/// Definitions ///
// Type definitions
typedef uint32_t lfs_size_t;
typedef uint32_t lfs_off_t;
typedef int32_t lfs_ssize_t;
typedef int32_t lfs_soff_t;
typedef uint32_t lfs_block_t;
// Maximum name size in bytes, may be redefined to reduce the size of the
// info struct. Limited to <= 1022. Stored in superblock and must be
// respected by other littlefs drivers.
#ifndef LFS_NAME_MAX
#define LFS_NAME_MAX 255
#endif
// Maximum size of a file in bytes, may be redefined to limit to support other
// drivers. Limited on disk to <= 4294967296. However, above 2147483647 the
// functions lfs_file_seek, lfs_file_size, and lfs_file_tell will return
// incorrect values due to using signed integers. Stored in superblock and
// must be respected by other littlefs drivers.
#ifndef LFS_FILE_MAX
#define LFS_FILE_MAX 2147483647
#endif
// Maximum size of custom attributes in bytes, may be redefined, but there is
// no real benefit to using a smaller LFS_ATTR_MAX. Limited to <= 1022.
#ifndef LFS_ATTR_MAX
#define LFS_ATTR_MAX 1022
#endif
// Possible error codes, these are negative to allow
// valid positive return values
enum lfs_error {
LFS_ERR_OK = 0, // No error
LFS_ERR_IO = -5, // Error during device operation
LFS_ERR_CORRUPT = -84, // Corrupted
LFS_ERR_NOENT = -2, // No directory entry
LFS_ERR_EXIST = -17, // Entry already exists
LFS_ERR_NOTDIR = -20, // Entry is not a dir
LFS_ERR_ISDIR = -21, // Entry is a dir
LFS_ERR_NOTEMPTY = -39, // Dir is not empty
LFS_ERR_BADF = -9, // Bad file number
LFS_ERR_FBIG = -27, // File too large
LFS_ERR_INVAL = -22, // Invalid parameter
LFS_ERR_NOSPC = -28, // No space left on device
LFS_ERR_NOMEM = -12, // No more memory available
LFS_ERR_NOATTR = -61, // No data/attr available
LFS_ERR_NAMETOOLONG = -36, // File name too long
};
// File types
enum lfs_type {
// file types
LFS_TYPE_REG = 0x001,
LFS_TYPE_DIR = 0x002,
// internally used types
LFS_TYPE_SPLICE = 0x400,
LFS_TYPE_NAME = 0x000,
LFS_TYPE_STRUCT = 0x200,
LFS_TYPE_USERATTR = 0x300,
LFS_TYPE_FROM = 0x100,
LFS_TYPE_TAIL = 0x600,
LFS_TYPE_GLOBALS = 0x700,
LFS_TYPE_CRC = 0x500,
// internally used type specializations
LFS_TYPE_CREATE = 0x401,
LFS_TYPE_DELETE = 0x4ff,
LFS_TYPE_SUPERBLOCK = 0x0ff,
LFS_TYPE_DIRSTRUCT = 0x200,
LFS_TYPE_CTZSTRUCT = 0x202,
LFS_TYPE_INLINESTRUCT = 0x201,
LFS_TYPE_SOFTTAIL = 0x600,
LFS_TYPE_HARDTAIL = 0x601,
LFS_TYPE_MOVESTATE = 0x7ff,
// internal chip sources
LFS_FROM_NOOP = 0x000,
LFS_FROM_MOVE = 0x101,
LFS_FROM_USERATTRS = 0x102,
};
// File open flags
enum lfs_open_flags {
// open flags
LFS_O_RDONLY = 1, // Open a file as read only
#ifndef LFS_READONLY
LFS_O_WRONLY = 2, // Open a file as write only
LFS_O_RDWR = 3, // Open a file as read and write
LFS_O_CREAT = 0x0100, // Create a file if it does not exist
LFS_O_EXCL = 0x0200, // Fail if a file already exists
LFS_O_TRUNC = 0x0400, // Truncate the existing file to zero size
LFS_O_APPEND = 0x0800, // Move to end of file on every write
#endif
// internally used flags
#ifndef LFS_READONLY
LFS_F_DIRTY = 0x010000, // File does not match storage
LFS_F_WRITING = 0x020000, // File has been written since last flush
#endif
LFS_F_READING = 0x040000, // File has been read since last flush
#ifndef LFS_READONLY
LFS_F_ERRED = 0x080000, // An error occurred during write
#endif
LFS_F_INLINE = 0x100000, // Currently inlined in directory entry
};
// File seek flags
enum lfs_whence_flags {
LFS_SEEK_SET = 0, // Seek relative to an absolute position
LFS_SEEK_CUR = 1, // Seek relative to the current file position
LFS_SEEK_END = 2, // Seek relative to the end of the file
};
// Configuration provided during initialization of the littlefs
struct lfs_config {
// Opaque user provided context that can be used to pass
// information to the block device operations
void *context;
// Read a region in a block. Negative error codes are propagated
// to the user.
int (*read)(const struct lfs_config *c, lfs_block_t block,
lfs_off_t off, void *buffer, lfs_size_t size);
// Program a region in a block. The block must have previously
// been erased. Negative error codes are propagated to the user.
// May return LFS_ERR_CORRUPT if the block should be considered bad.
int (*prog)(const struct lfs_config *c, lfs_block_t block,
lfs_off_t off, const void *buffer, lfs_size_t size);
// Erase a block. A block must be erased before being programmed.
// The state of an erased block is undefined. Negative error codes
// are propagated to the user.
// May return LFS_ERR_CORRUPT if the block should be considered bad.
int (*erase)(const struct lfs_config *c, lfs_block_t block);
// Sync the state of the underlying block device. Negative error codes
// are propagated to the user.
int (*sync)(const struct lfs_config *c);
#ifdef LFS_THREADSAFE
// Lock the underlying block device. Negative error codes
// are propagated to the user.
int (*lock)(const struct lfs_config *c);
// Unlock the underlying block device. Negative error codes
// are propagated to the user.
int (*unlock)(const struct lfs_config *c);
#endif
// Minimum size of a block read in bytes. All read operations will be a
// multiple of this value.
lfs_size_t read_size;
// Minimum size of a block program in bytes. All program operations will be
// a multiple of this value.
lfs_size_t prog_size;
// Size of an erasable block in bytes. This does not impact ram consumption
// and may be larger than the physical erase size. However, non-inlined
// files take up at minimum one block. Must be a multiple of the read and
// program sizes.
lfs_size_t block_size;
// Number of erasable blocks on the device.
lfs_size_t block_count;
// Number of erase cycles before littlefs evicts metadata logs and moves
// the metadata to another block. Suggested values are in the
// range 100-1000, with large values having better performance at the cost
// of less consistent wear distribution.
//
// Set to -1 to disable block-level wear-leveling.
int32_t block_cycles;
// Size of block caches in bytes. Each cache buffers a portion of a block in
// RAM. The littlefs needs a read cache, a program cache, and one additional
// cache per file. Larger caches can improve performance by storing more
// data and reducing the number of disk accesses. Must be a multiple of the
// read and program sizes, and a factor of the block size.
lfs_size_t cache_size;
// Size of the lookahead buffer in bytes. A larger lookahead buffer
// increases the number of blocks found during an allocation pass. The
// lookahead buffer is stored as a compact bitmap, so each byte of RAM
// can track 8 blocks. Must be a multiple of 8.
lfs_size_t lookahead_size;
// Optional statically allocated read buffer. Must be cache_size.
// By default lfs_malloc is used to allocate this buffer.
void *read_buffer;
// Optional statically allocated program buffer. Must be cache_size.
// By default lfs_malloc is used to allocate this buffer.
void *prog_buffer;
// Optional statically allocated lookahead buffer. Must be lookahead_size
// and aligned to a 32-bit boundary. By default lfs_malloc is used to
// allocate this buffer.
void *lookahead_buffer;
// Optional upper limit on length of file names in bytes. No downside for
// larger names except the size of the info struct which is controlled by
// the LFS_NAME_MAX define. Defaults to LFS_NAME_MAX when zero. Stored in
// superblock and must be respected by other littlefs drivers.
lfs_size_t name_max;
// Optional upper limit on files in bytes. No downside for larger files
// but must be <= LFS_FILE_MAX. Defaults to LFS_FILE_MAX when zero. Stored
// in superblock and must be respected by other littlefs drivers.
lfs_size_t file_max;
// Optional upper limit on custom attributes in bytes. No downside for
// larger attributes size but must be <= LFS_ATTR_MAX. Defaults to
// LFS_ATTR_MAX when zero.
lfs_size_t attr_max;
// Optional upper limit on total space given to metadata pairs in bytes. On
// devices with large blocks (e.g. 128kB) setting this to a low size (2-8kB)
// can help bound the metadata compaction time. Must be <= block_size.
// Defaults to block_size when zero.
lfs_size_t metadata_max;
};
// File info structure
struct lfs_info {
// Type of the file, either LFS_TYPE_REG or LFS_TYPE_DIR
uint8_t type;
// Size of the file, only valid for REG files. Limited to 32-bits.
lfs_size_t size;
// Name of the file stored as a null-terminated string. Limited to
// LFS_NAME_MAX+1, which can be changed by redefining LFS_NAME_MAX to
// reduce RAM. LFS_NAME_MAX is stored in superblock and must be
// respected by other littlefs drivers.
char name[LFS_NAME_MAX+1];
};
// Custom attribute structure, used to describe custom attributes
// committed atomically during file writes.
struct lfs_attr {
// 8-bit type of attribute, provided by user and used to
// identify the attribute
uint8_t type;
// Pointer to buffer containing the attribute
void *buffer;
// Size of attribute in bytes, limited to LFS_ATTR_MAX
lfs_size_t size;
};
// Optional configuration provided during lfs_file_opencfg
struct lfs_file_config {
// Optional statically allocated file buffer. Must be cache_size.
// By default lfs_malloc is used to allocate this buffer.
void *buffer;
// Optional list of custom attributes related to the file. If the file
// is opened with read access, these attributes will be read from disk
// during the open call. If the file is opened with write access, the
// attributes will be written to disk every file sync or close. This
// write occurs atomically with update to the file's contents.
//
// Custom attributes are uniquely identified by an 8-bit type and limited
// to LFS_ATTR_MAX bytes. When read, if the stored attribute is smaller
// than the buffer, it will be padded with zeros. If the stored attribute
// is larger, then it will be silently truncated. If the attribute is not
// found, it will be created implicitly.
struct lfs_attr *attrs;
// Number of custom attributes in the list
lfs_size_t attr_count;
};
/// internal littlefs data structures ///
typedef struct lfs_cache {
lfs_block_t block;
lfs_off_t off;
lfs_size_t size;
uint8_t *buffer;
} lfs_cache_t;
typedef struct lfs_mdir {
lfs_block_t pair[2];
uint32_t rev;
lfs_off_t off;
uint32_t etag;
uint16_t count;
bool erased;
bool split;
lfs_block_t tail[2];
} lfs_mdir_t;
// littlefs directory type
typedef struct lfs_dir {
struct lfs_dir *next;
uint16_t id;
uint8_t type;
lfs_mdir_t m;
lfs_off_t pos;
lfs_block_t head[2];
} lfs_dir_t;
// littlefs file type
typedef struct lfs_file {
struct lfs_file *next;
uint16_t id;
uint8_t type;
lfs_mdir_t m;
struct lfs_ctz {
lfs_block_t head;
lfs_size_t size;
} ctz;
uint32_t flags;
lfs_off_t pos;
lfs_block_t block;
lfs_off_t off;
lfs_cache_t cache;
const struct lfs_file_config *cfg;
} lfs_file_t;
typedef struct lfs_superblock {
uint32_t version;
lfs_size_t block_size;
lfs_size_t block_count;
lfs_size_t name_max;
lfs_size_t file_max;
lfs_size_t attr_max;
} lfs_superblock_t;
typedef struct lfs_gstate {
uint32_t tag;
lfs_block_t pair[2];
} lfs_gstate_t;
// The littlefs filesystem type
typedef struct lfs {
lfs_cache_t rcache;
lfs_cache_t pcache;
lfs_block_t root[2];
struct lfs_mlist {
struct lfs_mlist *next;
uint16_t id;
uint8_t type;
lfs_mdir_t m;
} *mlist;
uint32_t seed;
lfs_gstate_t gstate;
lfs_gstate_t gdisk;
lfs_gstate_t gdelta;
struct lfs_free {
lfs_block_t off;
lfs_block_t size;
lfs_block_t i;
lfs_block_t ack;
uint32_t *buffer;
} free;
const struct lfs_config *cfg;
lfs_size_t name_max;
lfs_size_t file_max;
lfs_size_t attr_max;
#ifdef LFS_MIGRATE
struct lfs1 *lfs1;
#endif
} lfs_t;
/// Filesystem functions ///
#ifndef LFS_READONLY
// Format a block device with the littlefs
//
// Requires a littlefs object and config struct. This clobbers the littlefs
// object, and does not leave the filesystem mounted. The config struct must
// be zeroed for defaults and backwards compatibility.
//
// Returns a negative error code on failure.
int lfs_format(lfs_t *lfs, const struct lfs_config *config);
#endif
// Mounts a littlefs
//
// Requires a littlefs object and config struct. Multiple filesystems
// may be mounted simultaneously with multiple littlefs objects. Both
// lfs and config must be allocated while mounted. The config struct must
// be zeroed for defaults and backwards compatibility.
//
// Returns a negative error code on failure.
int lfs_mount(lfs_t *lfs, const struct lfs_config *config);
// Unmounts a littlefs
//
// Does nothing besides releasing any allocated resources.
// Returns a negative error code on failure.
int lfs_unmount(lfs_t *lfs);
/// General operations ///
#ifndef LFS_READONLY
// Removes a file or directory
//
// If removing a directory, the directory must be empty.
// Returns a negative error code on failure.
int lfs_remove(lfs_t *lfs, const char *path);
#endif
#ifndef LFS_READONLY
// Rename or move a file or directory
//
// If the destination exists, it must match the source in type.
// If the destination is a directory, the directory must be empty.
//
// Returns a negative error code on failure.
int lfs_rename(lfs_t *lfs, const char *oldpath, const char *newpath);
#endif
// Find info about a file or directory
//
// Fills out the info structure, based on the specified file or directory.
// Returns a negative error code on failure.
int lfs_stat(lfs_t *lfs, const char *path, struct lfs_info *info);
// Get a custom attribute
//
// Custom attributes are uniquely identified by an 8-bit type and limited
// to LFS_ATTR_MAX bytes. When read, if the stored attribute is smaller than
// the buffer, it will be padded with zeros. If the stored attribute is larger,
// then it will be silently truncated. If no attribute is found, the error
// LFS_ERR_NOATTR is returned and the buffer is filled with zeros.
//
// Returns the size of the attribute, or a negative error code on failure.
// Note, the returned size is the size of the attribute on disk, irrespective
// of the size of the buffer. This can be used to dynamically allocate a buffer
// or check for existence.
lfs_ssize_t lfs_getattr(lfs_t *lfs, const char *path,
uint8_t type, void *buffer, lfs_size_t size);
#ifndef LFS_READONLY
// Set custom attributes
//
// Custom attributes are uniquely identified by an 8-bit type and limited
// to LFS_ATTR_MAX bytes. If an attribute is not found, it will be
// implicitly created.
//
// Returns a negative error code on failure.
int lfs_setattr(lfs_t *lfs, const char *path,
uint8_t type, const void *buffer, lfs_size_t size);
#endif
#ifndef LFS_READONLY
// Removes a custom attribute
//
// If an attribute is not found, nothing happens.
//
// Returns a negative error code on failure.
int lfs_removeattr(lfs_t *lfs, const char *path, uint8_t type);
#endif
/// File operations ///
#ifndef LFS_NO_MALLOC
// Open a file
//
// The mode that the file is opened in is determined by the flags, which
// are values from the enum lfs_open_flags that are bitwise-ored together.
//
// Returns a negative error code on failure.
int lfs_file_open(lfs_t *lfs, lfs_file_t *file,
const char *path, int flags);
// if LFS_NO_MALLOC is defined, lfs_file_open() will fail with LFS_ERR_NOMEM
// thus use lfs_file_opencfg() with config.buffer set.
#endif
// Open a file with extra configuration
//
// The mode that the file is opened in is determined by the flags, which
// are values from the enum lfs_open_flags that are bitwise-ored together.
//
// The config struct provides additional config options per file as described
// above. The config struct must remain allocated while the file is open, and
// the config struct must be zeroed for defaults and backwards compatibility.
//
// Returns a negative error code on failure.
int lfs_file_opencfg(lfs_t *lfs, lfs_file_t *file,
const char *path, int flags,
const struct lfs_file_config *config);
// Close a file
//
// Any pending writes are written out to storage as though
// sync had been called and releases any allocated resources.
//
// Returns a negative error code on failure.
int lfs_file_close(lfs_t *lfs, lfs_file_t *file);
// Synchronize a file on storage
//
// Any pending writes are written out to storage.
// Returns a negative error code on failure.
int lfs_file_sync(lfs_t *lfs, lfs_file_t *file);
// Read data from file
//
// Takes a buffer and size indicating where to store the read data.
// Returns the number of bytes read, or a negative error code on failure.
lfs_ssize_t lfs_file_read(lfs_t *lfs, lfs_file_t *file,
void *buffer, lfs_size_t size);
#ifndef LFS_READONLY
// Write data to file
//
// Takes a buffer and size indicating the data to write. The file will not
// actually be updated on the storage until either sync or close is called.
//
// Returns the number of bytes written, or a negative error code on failure.
lfs_ssize_t lfs_file_write(lfs_t *lfs, lfs_file_t *file,
const void *buffer, lfs_size_t size);
#endif
// Change the position of the file
//
// The change in position is determined by the offset and whence flag.
// Returns the new position of the file, or a negative error code on failure.
lfs_soff_t lfs_file_seek(lfs_t *lfs, lfs_file_t *file,
lfs_soff_t off, int whence);
#ifndef LFS_READONLY
// Truncates the size of the file to the specified size
//
// Returns a negative error code on failure.
int lfs_file_truncate(lfs_t *lfs, lfs_file_t *file, lfs_off_t size);
#endif
// Return the position of the file
//
// Equivalent to lfs_file_seek(lfs, file, 0, LFS_SEEK_CUR)
// Returns the position of the file, or a negative error code on failure.
lfs_soff_t lfs_file_tell(lfs_t *lfs, lfs_file_t *file);
// Change the position of the file to the beginning of the file
//
// Equivalent to lfs_file_seek(lfs, file, 0, LFS_SEEK_SET)
// Returns a negative error code on failure.
int lfs_file_rewind(lfs_t *lfs, lfs_file_t *file);
// Return the size of the file
//
// Similar to lfs_file_seek(lfs, file, 0, LFS_SEEK_END)
// Returns the size of the file, or a negative error code on failure.
lfs_soff_t lfs_file_size(lfs_t *lfs, lfs_file_t *file);
/// Directory operations ///
#ifndef LFS_READONLY
// Create a directory
//
// Returns a negative error code on failure.
int lfs_mkdir(lfs_t *lfs, const char *path);
#endif
// Open a directory
//
// Once open a directory can be used with read to iterate over files.
// Returns a negative error code on failure.
int lfs_dir_open(lfs_t *lfs, lfs_dir_t *dir, const char *path);
// Close a directory
//
// Releases any allocated resources.
// Returns a negative error code on failure.
int lfs_dir_close(lfs_t *lfs, lfs_dir_t *dir);
// Read an entry in the directory
//
// Fills out the info structure, based on the specified file or directory.
// Returns a positive value on success, 0 at the end of directory,
// or a negative error code on failure.
int lfs_dir_read(lfs_t *lfs, lfs_dir_t *dir, struct lfs_info *info);
// Change the position of the directory
//
// The new off must be a value previous returned from tell and specifies
// an absolute offset in the directory seek.
//
// Returns a negative error code on failure.
int lfs_dir_seek(lfs_t *lfs, lfs_dir_t *dir, lfs_off_t off);
// Return the position of the directory
//
// The returned offset is only meant to be consumed by seek and may not make
// sense, but does indicate the current position in the directory iteration.
//
// Returns the position of the directory, or a negative error code on failure.
lfs_soff_t lfs_dir_tell(lfs_t *lfs, lfs_dir_t *dir);
// Change the position of the directory to the beginning of the directory
//
// Returns a negative error code on failure.
int lfs_dir_rewind(lfs_t *lfs, lfs_dir_t *dir);
/// Filesystem-level filesystem operations
// Finds the current size of the filesystem
//
// Note: Result is best effort. If files share COW structures, the returned
// size may be larger than the filesystem actually is.
//
// Returns the number of allocated blocks, or a negative error code on failure.
lfs_ssize_t lfs_fs_size(lfs_t *lfs);
// Traverse through all blocks in use by the filesystem
//
// The provided callback will be called with each block address that is
// currently in use by the filesystem. This can be used to determine which
// blocks are in use or how much of the storage is available.
//
// Returns a negative error code on failure.
int lfs_fs_traverse(lfs_t *lfs, int (*cb)(void*, lfs_block_t), void *data);
#ifndef LFS_READONLY
#ifdef LFS_MIGRATE
// Attempts to migrate a previous version of littlefs
//
// Behaves similarly to the lfs_format function. Attempts to mount
// the previous version of littlefs and update the filesystem so it can be
// mounted with the current version of littlefs.
//
// Requires a littlefs object and config struct. This clobbers the littlefs
// object, and does not leave the filesystem mounted. The config struct must
// be zeroed for defaults and backwards compatibility.
//
// Returns a negative error code on failure.
int lfs_migrate(lfs_t *lfs, const struct lfs_config *cfg);
#endif
#endif
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif

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/*
* lfs util functions
*
* Copyright (c) 2022, The littlefs authors.
* Copyright (c) 2017, Arm Limited. All rights reserved.
* SPDX-License-Identifier: BSD-3-Clause
*/
#include "lfs_util.h"
// Only compile if user does not provide custom config
#ifndef LFS_CONFIG
// Software CRC implementation with small lookup table
uint32_t lfs_crc(uint32_t crc, const void *buffer, size_t size) {
static const uint32_t rtable[16] = {
0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac,
0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c,
0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c,
};
const uint8_t *data = buffer;
for (size_t i = 0; i < size; i++) {
crc = (crc >> 4) ^ rtable[(crc ^ (data[i] >> 0)) & 0xf];
crc = (crc >> 4) ^ rtable[(crc ^ (data[i] >> 4)) & 0xf];
}
return crc;
}
#endif

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/*
* lfs utility functions
*
* Copyright (c) 2022, The littlefs authors.
* Copyright (c) 2017, Arm Limited. All rights reserved.
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef LFS_UTIL_H
#define LFS_UTIL_H
// Users can override lfs_util.h with their own configuration by defining
// LFS_CONFIG as a header file to include (-DLFS_CONFIG=lfs_config.h).
//
// If LFS_CONFIG is used, none of the default utils will be emitted and must be
// provided by the config file. To start, I would suggest copying lfs_util.h
// and modifying as needed.
#ifdef LFS_CONFIG
#define LFS_STRINGIZE(x) LFS_STRINGIZE2(x)
#define LFS_STRINGIZE2(x) #x
#include LFS_STRINGIZE(LFS_CONFIG)
#else
// System includes
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <inttypes.h>
#ifndef LFS_NO_MALLOC
#include <stdlib.h>
#endif
#ifndef LFS_NO_ASSERT
#include <assert.h>
#endif
#if !defined(LFS_NO_DEBUG) || \
!defined(LFS_NO_WARN) || \
!defined(LFS_NO_ERROR) || \
defined(LFS_YES_TRACE)
#include <stdio.h>
#endif
#ifdef __cplusplus
extern "C"
{
#endif
// Macros, may be replaced by system specific wrappers. Arguments to these
// macros must not have side-effects as the macros can be removed for a smaller
// code footprint
// Logging functions
#ifndef LFS_TRACE
#ifdef LFS_YES_TRACE
#define LFS_TRACE_(fmt, ...) \
printf("%s:%d:trace: " fmt "%s\r\n", __FILE__, __LINE__, __VA_ARGS__)
#define LFS_TRACE(...) LFS_TRACE_(__VA_ARGS__, "")
#else
#define LFS_TRACE(...)
#endif
#endif
#ifndef LFS_DEBUG
#ifndef LFS_NO_DEBUG
#define LFS_DEBUG_(fmt, ...) \
printf("%s:%d:debug: " fmt "%s\r\n", __FILE__, __LINE__, __VA_ARGS__)
#define LFS_DEBUG(...) LFS_DEBUG_(__VA_ARGS__, "")
#else
#define LFS_DEBUG(...)
#endif
#endif
#ifndef LFS_WARN
#ifndef LFS_NO_WARN
#define LFS_WARN_(fmt, ...) \
printf("%s:%d:warn: " fmt "%s\r\n", __FILE__, __LINE__, __VA_ARGS__)
#define LFS_WARN(...) LFS_WARN_(__VA_ARGS__, "")
#else
#define LFS_WARN(...)
#endif
#endif
#ifndef LFS_ERROR
#ifndef LFS_NO_ERROR
#define LFS_ERROR_(fmt, ...) \
printf("%s:%d:error: " fmt "%s\r\n", __FILE__, __LINE__, __VA_ARGS__)
#define LFS_ERROR(...) LFS_ERROR_(__VA_ARGS__, "")
#else
#define LFS_ERROR(...)
#endif
#endif
// Runtime assertions
#ifndef LFS_ASSERT
#ifndef LFS_NO_ASSERT
#define LFS_ASSERT(test) assert(test)
#else
#define LFS_ASSERT(test)
#endif
#endif
// Builtin functions, these may be replaced by more efficient
// toolchain-specific implementations. LFS_NO_INTRINSICS falls back to a more
// expensive basic C implementation for debugging purposes
// Min/max functions for unsigned 32-bit numbers
static inline uint32_t lfs_max(uint32_t a, uint32_t b) {
return (a > b) ? a : b;
}
static inline uint32_t lfs_min(uint32_t a, uint32_t b) {
return (a < b) ? a : b;
}
// Align to nearest multiple of a size
static inline uint32_t lfs_aligndown(uint32_t a, uint32_t alignment) {
return a - (a % alignment);
}
static inline uint32_t lfs_alignup(uint32_t a, uint32_t alignment) {
return lfs_aligndown(a + alignment-1, alignment);
}
// Find the smallest power of 2 greater than or equal to a
static inline uint32_t lfs_npw2(uint32_t a) {
#if !defined(LFS_NO_INTRINSICS) && (defined(__GNUC__) || defined(__CC_ARM))
return 32 - __builtin_clz(a-1);
#else
uint32_t r = 0;
uint32_t s;
a -= 1;
s = (a > 0xffff) << 4; a >>= s; r |= s;
s = (a > 0xff ) << 3; a >>= s; r |= s;
s = (a > 0xf ) << 2; a >>= s; r |= s;
s = (a > 0x3 ) << 1; a >>= s; r |= s;
return (r | (a >> 1)) + 1;
#endif
}
// Count the number of trailing binary zeros in a
// lfs_ctz(0) may be undefined
static inline uint32_t lfs_ctz(uint32_t a) {
#if !defined(LFS_NO_INTRINSICS) && defined(__GNUC__)
return __builtin_ctz(a);
#else
return lfs_npw2((a & -a) + 1) - 1;
#endif
}
// Count the number of binary ones in a
static inline uint32_t lfs_popc(uint32_t a) {
#if !defined(LFS_NO_INTRINSICS) && (defined(__GNUC__) || defined(__CC_ARM))
return __builtin_popcount(a);
#else
a = a - ((a >> 1) & 0x55555555);
a = (a & 0x33333333) + ((a >> 2) & 0x33333333);
return (((a + (a >> 4)) & 0xf0f0f0f) * 0x1010101) >> 24;
#endif
}
// Find the sequence comparison of a and b, this is the distance
// between a and b ignoring overflow
static inline int lfs_scmp(uint32_t a, uint32_t b) {
return (int)(unsigned)(a - b);
}
// Convert between 32-bit little-endian and native order
static inline uint32_t lfs_fromle32(uint32_t a) {
#if (defined( BYTE_ORDER ) && defined( ORDER_LITTLE_ENDIAN ) && BYTE_ORDER == ORDER_LITTLE_ENDIAN ) || \
(defined(__BYTE_ORDER ) && defined(__ORDER_LITTLE_ENDIAN ) && __BYTE_ORDER == __ORDER_LITTLE_ENDIAN ) || \
(defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
return a;
#elif !defined(LFS_NO_INTRINSICS) && ( \
(defined( BYTE_ORDER ) && defined( ORDER_BIG_ENDIAN ) && BYTE_ORDER == ORDER_BIG_ENDIAN ) || \
(defined(__BYTE_ORDER ) && defined(__ORDER_BIG_ENDIAN ) && __BYTE_ORDER == __ORDER_BIG_ENDIAN ) || \
(defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__))
return __builtin_bswap32(a);
#else
return (((uint8_t*)&a)[0] << 0) |
(((uint8_t*)&a)[1] << 8) |
(((uint8_t*)&a)[2] << 16) |
(((uint8_t*)&a)[3] << 24);
#endif
}
static inline uint32_t lfs_tole32(uint32_t a) {
return lfs_fromle32(a);
}
// Convert between 32-bit big-endian and native order
static inline uint32_t lfs_frombe32(uint32_t a) {
#if !defined(LFS_NO_INTRINSICS) && ( \
(defined( BYTE_ORDER ) && defined( ORDER_LITTLE_ENDIAN ) && BYTE_ORDER == ORDER_LITTLE_ENDIAN ) || \
(defined(__BYTE_ORDER ) && defined(__ORDER_LITTLE_ENDIAN ) && __BYTE_ORDER == __ORDER_LITTLE_ENDIAN ) || \
(defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__))
return __builtin_bswap32(a);
#elif (defined( BYTE_ORDER ) && defined( ORDER_BIG_ENDIAN ) && BYTE_ORDER == ORDER_BIG_ENDIAN ) || \
(defined(__BYTE_ORDER ) && defined(__ORDER_BIG_ENDIAN ) && __BYTE_ORDER == __ORDER_BIG_ENDIAN ) || \
(defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
return a;
#else
return (((uint8_t*)&a)[0] << 24) |
(((uint8_t*)&a)[1] << 16) |
(((uint8_t*)&a)[2] << 8) |
(((uint8_t*)&a)[3] << 0);
#endif
}
static inline uint32_t lfs_tobe32(uint32_t a) {
return lfs_frombe32(a);
}
// Calculate CRC-32 with polynomial = 0x04c11db7
uint32_t lfs_crc(uint32_t crc, const void *buffer, size_t size);
// Allocate memory, only used if buffers are not provided to littlefs
// Note, memory must be 64-bit aligned
static inline void *lfs_malloc(size_t size) {
#ifndef LFS_NO_MALLOC
return malloc(size);
#else
(void)size;
return NULL;
#endif
}
// Deallocate memory, only used if buffers are not provided to littlefs
static inline void lfs_free(void *p) {
#ifndef LFS_NO_MALLOC
free(p);
#else
(void)p;
#endif
}
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif
#endif

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components/fs/littlefs/littlefs/scripts/code.py Executable file
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#!/usr/bin/env python3
#
# Script to find code size at the function level. Basically just a bit wrapper
# around nm with some extra conveniences for comparing builds. Heavily inspired
# by Linux's Bloat-O-Meter.
#
import os
import glob
import itertools as it
import subprocess as sp
import shlex
import re
import csv
import collections as co
OBJ_PATHS = ['*.o']
def collect(paths, **args):
results = co.defaultdict(lambda: 0)
pattern = re.compile(
'^(?P<size>[0-9a-fA-F]+)' +
' (?P<type>[%s])' % re.escape(args['type']) +
' (?P<func>.+?)$')
for path in paths:
# note nm-tool may contain extra args
cmd = args['nm_tool'] + ['--size-sort', path]
if args.get('verbose'):
print(' '.join(shlex.quote(c) for c in cmd))
proc = sp.Popen(cmd,
stdout=sp.PIPE,
stderr=sp.PIPE if not args.get('verbose') else None,
universal_newlines=True,
errors='replace')
for line in proc.stdout:
m = pattern.match(line)
if m:
results[(path, m.group('func'))] += int(m.group('size'), 16)
proc.wait()
if proc.returncode != 0:
if not args.get('verbose'):
for line in proc.stderr:
sys.stdout.write(line)
sys.exit(-1)
flat_results = []
for (file, func), size in results.items():
# map to source files
if args.get('build_dir'):
file = re.sub('%s/*' % re.escape(args['build_dir']), '', file)
# replace .o with .c, different scripts report .o/.c, we need to
# choose one if we want to deduplicate csv files
file = re.sub('\.o$', '.c', file)
# discard internal functions
if not args.get('everything'):
if func.startswith('__'):
continue
# discard .8449 suffixes created by optimizer
func = re.sub('\.[0-9]+', '', func)
flat_results.append((file, func, size))
return flat_results
def main(**args):
def openio(path, mode='r'):
if path == '-':
if 'r' in mode:
return os.fdopen(os.dup(sys.stdin.fileno()), 'r')
else:
return os.fdopen(os.dup(sys.stdout.fileno()), 'w')
else:
return open(path, mode)
# find sizes
if not args.get('use', None):
# find .o files
paths = []
for path in args['obj_paths']:
if os.path.isdir(path):
path = path + '/*.o'
for path in glob.glob(path):
paths.append(path)
if not paths:
print('no .obj files found in %r?' % args['obj_paths'])
sys.exit(-1)
results = collect(paths, **args)
else:
with openio(args['use']) as f:
r = csv.DictReader(f)
results = [
( result['file'],
result['name'],
int(result['code_size']))
for result in r
if result.get('code_size') not in {None, ''}]
total = 0
for _, _, size in results:
total += size
# find previous results?
if args.get('diff'):
try:
with openio(args['diff']) as f:
r = csv.DictReader(f)
prev_results = [
( result['file'],
result['name'],
int(result['code_size']))
for result in r
if result.get('code_size') not in {None, ''}]
except FileNotFoundError:
prev_results = []
prev_total = 0
for _, _, size in prev_results:
prev_total += size
# write results to CSV
if args.get('output'):
merged_results = co.defaultdict(lambda: {})
other_fields = []
# merge?
if args.get('merge'):
try:
with openio(args['merge']) as f:
r = csv.DictReader(f)
for result in r:
file = result.pop('file', '')
func = result.pop('name', '')
result.pop('code_size', None)
merged_results[(file, func)] = result
other_fields = result.keys()
except FileNotFoundError:
pass
for file, func, size in results:
merged_results[(file, func)]['code_size'] = size
with openio(args['output'], 'w') as f:
w = csv.DictWriter(f, ['file', 'name', *other_fields, 'code_size'])
w.writeheader()
for (file, func), result in sorted(merged_results.items()):
w.writerow({'file': file, 'name': func, **result})
# print results
def dedup_entries(results, by='name'):
entries = co.defaultdict(lambda: 0)
for file, func, size in results:
entry = (file if by == 'file' else func)
entries[entry] += size
return entries
def diff_entries(olds, news):
diff = co.defaultdict(lambda: (0, 0, 0, 0))
for name, new in news.items():
diff[name] = (0, new, new, 1.0)
for name, old in olds.items():
_, new, _, _ = diff[name]
diff[name] = (old, new, new-old, (new-old)/old if old else 1.0)
return diff
def sorted_entries(entries):
if args.get('size_sort'):
return sorted(entries, key=lambda x: (-x[1], x))
elif args.get('reverse_size_sort'):
return sorted(entries, key=lambda x: (+x[1], x))
else:
return sorted(entries)
def sorted_diff_entries(entries):
if args.get('size_sort'):
return sorted(entries, key=lambda x: (-x[1][1], x))
elif args.get('reverse_size_sort'):
return sorted(entries, key=lambda x: (+x[1][1], x))
else:
return sorted(entries, key=lambda x: (-x[1][3], x))
def print_header(by=''):
if not args.get('diff'):
print('%-36s %7s' % (by, 'size'))
else:
print('%-36s %7s %7s %7s' % (by, 'old', 'new', 'diff'))
def print_entry(name, size):
print("%-36s %7d" % (name, size))
def print_diff_entry(name, old, new, diff, ratio):
print("%-36s %7s %7s %+7d%s" % (name,
old or "-",
new or "-",
diff,
' (%+.1f%%)' % (100*ratio) if ratio else ''))
def print_entries(by='name'):
entries = dedup_entries(results, by=by)
if not args.get('diff'):
print_header(by=by)
for name, size in sorted_entries(entries.items()):
print_entry(name, size)
else:
prev_entries = dedup_entries(prev_results, by=by)
diff = diff_entries(prev_entries, entries)
print_header(by='%s (%d added, %d removed)' % (by,
sum(1 for old, _, _, _ in diff.values() if not old),
sum(1 for _, new, _, _ in diff.values() if not new)))
for name, (old, new, diff, ratio) in sorted_diff_entries(
diff.items()):
if ratio or args.get('all'):
print_diff_entry(name, old, new, diff, ratio)
def print_totals():
if not args.get('diff'):
print_entry('TOTAL', total)
else:
ratio = (0.0 if not prev_total and not total
else 1.0 if not prev_total
else (total-prev_total)/prev_total)
print_diff_entry('TOTAL',
prev_total, total,
total-prev_total,
ratio)
if args.get('quiet'):
pass
elif args.get('summary'):
print_header()
print_totals()
elif args.get('files'):
print_entries(by='file')
print_totals()
else:
print_entries(by='name')
print_totals()
if __name__ == "__main__":
import argparse
import sys
parser = argparse.ArgumentParser(
description="Find code size at the function level.")
parser.add_argument('obj_paths', nargs='*', default=OBJ_PATHS,
help="Description of where to find *.o files. May be a directory \
or a list of paths. Defaults to %r." % OBJ_PATHS)
parser.add_argument('-v', '--verbose', action='store_true',
help="Output commands that run behind the scenes.")
parser.add_argument('-q', '--quiet', action='store_true',
help="Don't show anything, useful with -o.")
parser.add_argument('-o', '--output',
help="Specify CSV file to store results.")
parser.add_argument('-u', '--use',
help="Don't compile and find code sizes, instead use this CSV file.")
parser.add_argument('-d', '--diff',
help="Specify CSV file to diff code size against.")
parser.add_argument('-m', '--merge',
help="Merge with an existing CSV file when writing to output.")
parser.add_argument('-a', '--all', action='store_true',
help="Show all functions, not just the ones that changed.")
parser.add_argument('-A', '--everything', action='store_true',
help="Include builtin and libc specific symbols.")
parser.add_argument('-s', '--size-sort', action='store_true',
help="Sort by size.")
parser.add_argument('-S', '--reverse-size-sort', action='store_true',
help="Sort by size, but backwards.")
parser.add_argument('-F', '--files', action='store_true',
help="Show file-level code sizes. Note this does not include padding! "
"So sizes may differ from other tools.")
parser.add_argument('-Y', '--summary', action='store_true',
help="Only show the total code size.")
parser.add_argument('--type', default='tTrRdD',
help="Type of symbols to report, this uses the same single-character "
"type-names emitted by nm. Defaults to %(default)r.")
parser.add_argument('--nm-tool', default=['nm'], type=lambda x: x.split(),
help="Path to the nm tool to use.")
parser.add_argument('--build-dir',
help="Specify the relative build directory. Used to map object files \
to the correct source files.")
sys.exit(main(**vars(parser.parse_args())))

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components/fs/littlefs/littlefs/scripts/coverage.py Executable file
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#!/usr/bin/env python3
#
# Parse and report coverage info from .info files generated by lcov
#
import os
import glob
import csv
import re
import collections as co
import bisect as b
INFO_PATHS = ['tests/*.toml.info']
def collect(paths, **args):
file = None
funcs = []
lines = co.defaultdict(lambda: 0)
pattern = re.compile(
'^(?P<file>SF:/?(?P<file_name>.*))$'
'|^(?P<func>FN:(?P<func_lineno>[0-9]*),(?P<func_name>.*))$'
'|^(?P<line>DA:(?P<line_lineno>[0-9]*),(?P<line_hits>[0-9]*))$')
for path in paths:
with open(path) as f:
for line in f:
m = pattern.match(line)
if m and m.group('file'):
file = m.group('file_name')
elif m and file and m.group('func'):
funcs.append((file, int(m.group('func_lineno')),
m.group('func_name')))
elif m and file and m.group('line'):
lines[(file, int(m.group('line_lineno')))] += (
int(m.group('line_hits')))
# map line numbers to functions
funcs.sort()
def func_from_lineno(file, lineno):
i = b.bisect(funcs, (file, lineno))
if i and funcs[i-1][0] == file:
return funcs[i-1][2]
else:
return None
# reduce to function info
reduced_funcs = co.defaultdict(lambda: (0, 0))
for (file, line_lineno), line_hits in lines.items():
func = func_from_lineno(file, line_lineno)
if not func:
continue
hits, count = reduced_funcs[(file, func)]
reduced_funcs[(file, func)] = (hits + (line_hits > 0), count + 1)
results = []
for (file, func), (hits, count) in reduced_funcs.items():
# discard internal/testing functions (test_* injected with
# internal testing)
if not args.get('everything'):
if func.startswith('__') or func.startswith('test_'):
continue
# discard .8449 suffixes created by optimizer
func = re.sub('\.[0-9]+', '', func)
results.append((file, func, hits, count))
return results
def main(**args):
def openio(path, mode='r'):
if path == '-':
if 'r' in mode:
return os.fdopen(os.dup(sys.stdin.fileno()), 'r')
else:
return os.fdopen(os.dup(sys.stdout.fileno()), 'w')
else:
return open(path, mode)
# find coverage
if not args.get('use'):
# find *.info files
paths = []
for path in args['info_paths']:
if os.path.isdir(path):
path = path + '/*.gcov'
for path in glob.glob(path):
paths.append(path)
if not paths:
print('no .info files found in %r?' % args['info_paths'])
sys.exit(-1)
results = collect(paths, **args)
else:
with openio(args['use']) as f:
r = csv.DictReader(f)
results = [
( result['file'],
result['name'],
int(result['coverage_hits']),
int(result['coverage_count']))
for result in r
if result.get('coverage_hits') not in {None, ''}
if result.get('coverage_count') not in {None, ''}]
total_hits, total_count = 0, 0
for _, _, hits, count in results:
total_hits += hits
total_count += count
# find previous results?
if args.get('diff'):
try:
with openio(args['diff']) as f:
r = csv.DictReader(f)
prev_results = [
( result['file'],
result['name'],
int(result['coverage_hits']),
int(result['coverage_count']))
for result in r
if result.get('coverage_hits') not in {None, ''}
if result.get('coverage_count') not in {None, ''}]
except FileNotFoundError:
prev_results = []
prev_total_hits, prev_total_count = 0, 0
for _, _, hits, count in prev_results:
prev_total_hits += hits
prev_total_count += count
# write results to CSV
if args.get('output'):
merged_results = co.defaultdict(lambda: {})
other_fields = []
# merge?
if args.get('merge'):
try:
with openio(args['merge']) as f:
r = csv.DictReader(f)
for result in r:
file = result.pop('file', '')
func = result.pop('name', '')
result.pop('coverage_hits', None)
result.pop('coverage_count', None)
merged_results[(file, func)] = result
other_fields = result.keys()
except FileNotFoundError:
pass
for file, func, hits, count in results:
merged_results[(file, func)]['coverage_hits'] = hits
merged_results[(file, func)]['coverage_count'] = count
with openio(args['output'], 'w') as f:
w = csv.DictWriter(f, ['file', 'name', *other_fields, 'coverage_hits', 'coverage_count'])
w.writeheader()
for (file, func), result in sorted(merged_results.items()):
w.writerow({'file': file, 'name': func, **result})
# print results
def dedup_entries(results, by='name'):
entries = co.defaultdict(lambda: (0, 0))
for file, func, hits, count in results:
entry = (file if by == 'file' else func)
entry_hits, entry_count = entries[entry]
entries[entry] = (entry_hits + hits, entry_count + count)
return entries
def diff_entries(olds, news):
diff = co.defaultdict(lambda: (0, 0, 0, 0, 0, 0, 0))
for name, (new_hits, new_count) in news.items():
diff[name] = (
0, 0,
new_hits, new_count,
new_hits, new_count,
(new_hits/new_count if new_count else 1.0) - 1.0)
for name, (old_hits, old_count) in olds.items():
_, _, new_hits, new_count, _, _, _ = diff[name]
diff[name] = (
old_hits, old_count,
new_hits, new_count,
new_hits-old_hits, new_count-old_count,
((new_hits/new_count if new_count else 1.0)
- (old_hits/old_count if old_count else 1.0)))
return diff
def sorted_entries(entries):
if args.get('coverage_sort'):
return sorted(entries, key=lambda x: (-(x[1][0]/x[1][1] if x[1][1] else -1), x))
elif args.get('reverse_coverage_sort'):
return sorted(entries, key=lambda x: (+(x[1][0]/x[1][1] if x[1][1] else -1), x))
else:
return sorted(entries)
def sorted_diff_entries(entries):
if args.get('coverage_sort'):
return sorted(entries, key=lambda x: (-(x[1][2]/x[1][3] if x[1][3] else -1), x))
elif args.get('reverse_coverage_sort'):
return sorted(entries, key=lambda x: (+(x[1][2]/x[1][3] if x[1][3] else -1), x))
else:
return sorted(entries, key=lambda x: (-x[1][6], x))
def print_header(by=''):
if not args.get('diff'):
print('%-36s %19s' % (by, 'hits/line'))
else:
print('%-36s %19s %19s %11s' % (by, 'old', 'new', 'diff'))
def print_entry(name, hits, count):
print("%-36s %11s %7s" % (name,
'%d/%d' % (hits, count)
if count else '-',
'%.1f%%' % (100*hits/count)
if count else '-'))
def print_diff_entry(name,
old_hits, old_count,
new_hits, new_count,
diff_hits, diff_count,
ratio):
print("%-36s %11s %7s %11s %7s %11s%s" % (name,
'%d/%d' % (old_hits, old_count)
if old_count else '-',
'%.1f%%' % (100*old_hits/old_count)
if old_count else '-',
'%d/%d' % (new_hits, new_count)
if new_count else '-',
'%.1f%%' % (100*new_hits/new_count)
if new_count else '-',
'%+d/%+d' % (diff_hits, diff_count),
' (%+.1f%%)' % (100*ratio) if ratio else ''))
def print_entries(by='name'):
entries = dedup_entries(results, by=by)
if not args.get('diff'):
print_header(by=by)
for name, (hits, count) in sorted_entries(entries.items()):
print_entry(name, hits, count)
else:
prev_entries = dedup_entries(prev_results, by=by)
diff = diff_entries(prev_entries, entries)
print_header(by='%s (%d added, %d removed)' % (by,
sum(1 for _, old, _, _, _, _, _ in diff.values() if not old),
sum(1 for _, _, _, new, _, _, _ in diff.values() if not new)))
for name, (
old_hits, old_count,
new_hits, new_count,
diff_hits, diff_count, ratio) in sorted_diff_entries(
diff.items()):
if ratio or args.get('all'):
print_diff_entry(name,
old_hits, old_count,
new_hits, new_count,
diff_hits, diff_count,
ratio)
def print_totals():
if not args.get('diff'):
print_entry('TOTAL', total_hits, total_count)
else:
ratio = ((total_hits/total_count
if total_count else 1.0)
- (prev_total_hits/prev_total_count
if prev_total_count else 1.0))
print_diff_entry('TOTAL',
prev_total_hits, prev_total_count,
total_hits, total_count,
total_hits-prev_total_hits, total_count-prev_total_count,
ratio)
if args.get('quiet'):
pass
elif args.get('summary'):
print_header()
print_totals()
elif args.get('files'):
print_entries(by='file')
print_totals()
else:
print_entries(by='name')
print_totals()
if __name__ == "__main__":
import argparse
import sys
parser = argparse.ArgumentParser(
description="Parse and report coverage info from .info files \
generated by lcov")
parser.add_argument('info_paths', nargs='*', default=INFO_PATHS,
help="Description of where to find *.info files. May be a directory \
or list of paths. *.info files will be merged to show the total \
coverage. Defaults to %r." % INFO_PATHS)
parser.add_argument('-v', '--verbose', action='store_true',
help="Output commands that run behind the scenes.")
parser.add_argument('-o', '--output',
help="Specify CSV file to store results.")
parser.add_argument('-u', '--use',
help="Don't do any work, instead use this CSV file.")
parser.add_argument('-d', '--diff',
help="Specify CSV file to diff code size against.")
parser.add_argument('-m', '--merge',
help="Merge with an existing CSV file when writing to output.")
parser.add_argument('-a', '--all', action='store_true',
help="Show all functions, not just the ones that changed.")
parser.add_argument('-A', '--everything', action='store_true',
help="Include builtin and libc specific symbols.")
parser.add_argument('-s', '--coverage-sort', action='store_true',
help="Sort by coverage.")
parser.add_argument('-S', '--reverse-coverage-sort', action='store_true',
help="Sort by coverage, but backwards.")
parser.add_argument('-F', '--files', action='store_true',
help="Show file-level coverage.")
parser.add_argument('-Y', '--summary', action='store_true',
help="Only show the total coverage.")
parser.add_argument('-q', '--quiet', action='store_true',
help="Don't show anything, useful with -o.")
parser.add_argument('--build-dir',
help="Specify the relative build directory. Used to map object files \
to the correct source files.")
sys.exit(main(**vars(parser.parse_args())))

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components/fs/littlefs/littlefs/scripts/data.py Executable file
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#!/usr/bin/env python3
#
# Script to find data size at the function level. Basically just a bit wrapper
# around nm with some extra conveniences for comparing builds. Heavily inspired
# by Linux's Bloat-O-Meter.
#
import os
import glob
import itertools as it
import subprocess as sp
import shlex
import re
import csv
import collections as co
OBJ_PATHS = ['*.o']
def collect(paths, **args):
results = co.defaultdict(lambda: 0)
pattern = re.compile(
'^(?P<size>[0-9a-fA-F]+)' +
' (?P<type>[%s])' % re.escape(args['type']) +
' (?P<func>.+?)$')
for path in paths:
# note nm-tool may contain extra args
cmd = args['nm_tool'] + ['--size-sort', path]
if args.get('verbose'):
print(' '.join(shlex.quote(c) for c in cmd))
proc = sp.Popen(cmd,
stdout=sp.PIPE,
stderr=sp.PIPE if not args.get('verbose') else None,
universal_newlines=True,
errors='replace')
for line in proc.stdout:
m = pattern.match(line)
if m:
results[(path, m.group('func'))] += int(m.group('size'), 16)
proc.wait()
if proc.returncode != 0:
if not args.get('verbose'):
for line in proc.stderr:
sys.stdout.write(line)
sys.exit(-1)
flat_results = []
for (file, func), size in results.items():
# map to source files
if args.get('build_dir'):
file = re.sub('%s/*' % re.escape(args['build_dir']), '', file)
# replace .o with .c, different scripts report .o/.c, we need to
# choose one if we want to deduplicate csv files
file = re.sub('\.o$', '.c', file)
# discard internal functions
if not args.get('everything'):
if func.startswith('__'):
continue
# discard .8449 suffixes created by optimizer
func = re.sub('\.[0-9]+', '', func)
flat_results.append((file, func, size))
return flat_results
def main(**args):
def openio(path, mode='r'):
if path == '-':
if 'r' in mode:
return os.fdopen(os.dup(sys.stdin.fileno()), 'r')
else:
return os.fdopen(os.dup(sys.stdout.fileno()), 'w')
else:
return open(path, mode)
# find sizes
if not args.get('use', None):
# find .o files
paths = []
for path in args['obj_paths']:
if os.path.isdir(path):
path = path + '/*.o'
for path in glob.glob(path):
paths.append(path)
if not paths:
print('no .obj files found in %r?' % args['obj_paths'])
sys.exit(-1)
results = collect(paths, **args)
else:
with openio(args['use']) as f:
r = csv.DictReader(f)
results = [
( result['file'],
result['name'],
int(result['data_size']))
for result in r
if result.get('data_size') not in {None, ''}]
total = 0
for _, _, size in results:
total += size
# find previous results?
if args.get('diff'):
try:
with openio(args['diff']) as f:
r = csv.DictReader(f)
prev_results = [
( result['file'],
result['name'],
int(result['data_size']))
for result in r
if result.get('data_size') not in {None, ''}]
except FileNotFoundError:
prev_results = []
prev_total = 0
for _, _, size in prev_results:
prev_total += size
# write results to CSV
if args.get('output'):
merged_results = co.defaultdict(lambda: {})
other_fields = []
# merge?
if args.get('merge'):
try:
with openio(args['merge']) as f:
r = csv.DictReader(f)
for result in r:
file = result.pop('file', '')
func = result.pop('name', '')
result.pop('data_size', None)
merged_results[(file, func)] = result
other_fields = result.keys()
except FileNotFoundError:
pass
for file, func, size in results:
merged_results[(file, func)]['data_size'] = size
with openio(args['output'], 'w') as f:
w = csv.DictWriter(f, ['file', 'name', *other_fields, 'data_size'])
w.writeheader()
for (file, func), result in sorted(merged_results.items()):
w.writerow({'file': file, 'name': func, **result})
# print results
def dedup_entries(results, by='name'):
entries = co.defaultdict(lambda: 0)
for file, func, size in results:
entry = (file if by == 'file' else func)
entries[entry] += size
return entries
def diff_entries(olds, news):
diff = co.defaultdict(lambda: (0, 0, 0, 0))
for name, new in news.items():
diff[name] = (0, new, new, 1.0)
for name, old in olds.items():
_, new, _, _ = diff[name]
diff[name] = (old, new, new-old, (new-old)/old if old else 1.0)
return diff
def sorted_entries(entries):
if args.get('size_sort'):
return sorted(entries, key=lambda x: (-x[1], x))
elif args.get('reverse_size_sort'):
return sorted(entries, key=lambda x: (+x[1], x))
else:
return sorted(entries)
def sorted_diff_entries(entries):
if args.get('size_sort'):
return sorted(entries, key=lambda x: (-x[1][1], x))
elif args.get('reverse_size_sort'):
return sorted(entries, key=lambda x: (+x[1][1], x))
else:
return sorted(entries, key=lambda x: (-x[1][3], x))
def print_header(by=''):
if not args.get('diff'):
print('%-36s %7s' % (by, 'size'))
else:
print('%-36s %7s %7s %7s' % (by, 'old', 'new', 'diff'))
def print_entry(name, size):
print("%-36s %7d" % (name, size))
def print_diff_entry(name, old, new, diff, ratio):
print("%-36s %7s %7s %+7d%s" % (name,
old or "-",
new or "-",
diff,
' (%+.1f%%)' % (100*ratio) if ratio else ''))
def print_entries(by='name'):
entries = dedup_entries(results, by=by)
if not args.get('diff'):
print_header(by=by)
for name, size in sorted_entries(entries.items()):
print_entry(name, size)
else:
prev_entries = dedup_entries(prev_results, by=by)
diff = diff_entries(prev_entries, entries)
print_header(by='%s (%d added, %d removed)' % (by,
sum(1 for old, _, _, _ in diff.values() if not old),
sum(1 for _, new, _, _ in diff.values() if not new)))
for name, (old, new, diff, ratio) in sorted_diff_entries(
diff.items()):
if ratio or args.get('all'):
print_diff_entry(name, old, new, diff, ratio)
def print_totals():
if not args.get('diff'):
print_entry('TOTAL', total)
else:
ratio = (0.0 if not prev_total and not total
else 1.0 if not prev_total
else (total-prev_total)/prev_total)
print_diff_entry('TOTAL',
prev_total, total,
total-prev_total,
ratio)
if args.get('quiet'):
pass
elif args.get('summary'):
print_header()
print_totals()
elif args.get('files'):
print_entries(by='file')
print_totals()
else:
print_entries(by='name')
print_totals()
if __name__ == "__main__":
import argparse
import sys
parser = argparse.ArgumentParser(
description="Find data size at the function level.")
parser.add_argument('obj_paths', nargs='*', default=OBJ_PATHS,
help="Description of where to find *.o files. May be a directory \
or a list of paths. Defaults to %r." % OBJ_PATHS)
parser.add_argument('-v', '--verbose', action='store_true',
help="Output commands that run behind the scenes.")
parser.add_argument('-q', '--quiet', action='store_true',
help="Don't show anything, useful with -o.")
parser.add_argument('-o', '--output',
help="Specify CSV file to store results.")
parser.add_argument('-u', '--use',
help="Don't compile and find data sizes, instead use this CSV file.")
parser.add_argument('-d', '--diff',
help="Specify CSV file to diff data size against.")
parser.add_argument('-m', '--merge',
help="Merge with an existing CSV file when writing to output.")
parser.add_argument('-a', '--all', action='store_true',
help="Show all functions, not just the ones that changed.")
parser.add_argument('-A', '--everything', action='store_true',
help="Include builtin and libc specific symbols.")
parser.add_argument('-s', '--size-sort', action='store_true',
help="Sort by size.")
parser.add_argument('-S', '--reverse-size-sort', action='store_true',
help="Sort by size, but backwards.")
parser.add_argument('-F', '--files', action='store_true',
help="Show file-level data sizes. Note this does not include padding! "
"So sizes may differ from other tools.")
parser.add_argument('-Y', '--summary', action='store_true',
help="Only show the total data size.")
parser.add_argument('--type', default='dDbB',
help="Type of symbols to report, this uses the same single-character "
"type-names emitted by nm. Defaults to %(default)r.")
parser.add_argument('--nm-tool', default=['nm'], type=lambda x: x.split(),
help="Path to the nm tool to use.")
parser.add_argument('--build-dir',
help="Specify the relative build directory. Used to map object files \
to the correct source files.")
sys.exit(main(**vars(parser.parse_args())))

383
components/fs/littlefs/littlefs/scripts/explode_asserts.py Executable file
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#!/usr/bin/env python3
import re
import sys
PATTERN = ['LFS_ASSERT', 'assert']
PREFIX = 'LFS'
MAXWIDTH = 16
ASSERT = "__{PREFIX}_ASSERT_{TYPE}_{COMP}"
FAIL = """
__attribute__((unused))
static void __{prefix}_assert_fail_{type}(
const char *file, int line, const char *comp,
{ctype} lh, size_t lsize,
{ctype} rh, size_t rsize) {{
printf("%s:%d:assert: assert failed with ", file, line);
__{prefix}_assert_print_{type}(lh, lsize);
printf(", expected %s ", comp);
__{prefix}_assert_print_{type}(rh, rsize);
printf("\\n");
fflush(NULL);
raise(SIGABRT);
}}
"""
COMP = {
'==': 'eq',
'!=': 'ne',
'<=': 'le',
'>=': 'ge',
'<': 'lt',
'>': 'gt',
}
TYPE = {
'int': {
'ctype': 'intmax_t',
'fail': FAIL,
'print': """
__attribute__((unused))
static void __{prefix}_assert_print_{type}({ctype} v, size_t size) {{
(void)size;
printf("%"PRIiMAX, v);
}}
""",
'assert': """
#define __{PREFIX}_ASSERT_{TYPE}_{COMP}(file, line, lh, rh)
do {{
__typeof__(lh) _lh = lh;
__typeof__(lh) _rh = (__typeof__(lh))rh;
if (!(_lh {op} _rh)) {{
__{prefix}_assert_fail_{type}(file, line, "{comp}",
(intmax_t)_lh, 0, (intmax_t)_rh, 0);
}}
}} while (0)
"""
},
'bool': {
'ctype': 'bool',
'fail': FAIL,
'print': """
__attribute__((unused))
static void __{prefix}_assert_print_{type}({ctype} v, size_t size) {{
(void)size;
printf("%s", v ? "true" : "false");
}}
""",
'assert': """
#define __{PREFIX}_ASSERT_{TYPE}_{COMP}(file, line, lh, rh)
do {{
bool _lh = !!(lh);
bool _rh = !!(rh);
if (!(_lh {op} _rh)) {{
__{prefix}_assert_fail_{type}(file, line, "{comp}",
_lh, 0, _rh, 0);
}}
}} while (0)
"""
},
'mem': {
'ctype': 'const void *',
'fail': FAIL,
'print': """
__attribute__((unused))
static void __{prefix}_assert_print_{type}({ctype} v, size_t size) {{
const uint8_t *s = v;
printf("\\\"");
for (size_t i = 0; i < size && i < {maxwidth}; i++) {{
if (s[i] >= ' ' && s[i] <= '~') {{
printf("%c", s[i]);
}} else {{
printf("\\\\x%02x", s[i]);
}}
}}
if (size > {maxwidth}) {{
printf("...");
}}
printf("\\\"");
}}
""",
'assert': """
#define __{PREFIX}_ASSERT_{TYPE}_{COMP}(file, line, lh, rh, size)
do {{
const void *_lh = lh;
const void *_rh = rh;
if (!(memcmp(_lh, _rh, size) {op} 0)) {{
__{prefix}_assert_fail_{type}(file, line, "{comp}",
_lh, size, _rh, size);
}}
}} while (0)
"""
},
'str': {
'ctype': 'const char *',
'fail': FAIL,
'print': """
__attribute__((unused))
static void __{prefix}_assert_print_{type}({ctype} v, size_t size) {{
__{prefix}_assert_print_mem(v, size);
}}
""",
'assert': """
#define __{PREFIX}_ASSERT_{TYPE}_{COMP}(file, line, lh, rh)
do {{
const char *_lh = lh;
const char *_rh = rh;
if (!(strcmp(_lh, _rh) {op} 0)) {{
__{prefix}_assert_fail_{type}(file, line, "{comp}",
_lh, strlen(_lh), _rh, strlen(_rh));
}}
}} while (0)
"""
}
}
def mkdecls(outf, maxwidth=16):
outf.write("#include <stdio.h>\n")
outf.write("#include <stdbool.h>\n")
outf.write("#include <stdint.h>\n")
outf.write("#include <inttypes.h>\n")
outf.write("#include <signal.h>\n")
for type, desc in sorted(TYPE.items()):
format = {
'type': type.lower(), 'TYPE': type.upper(),
'ctype': desc['ctype'],
'prefix': PREFIX.lower(), 'PREFIX': PREFIX.upper(),
'maxwidth': maxwidth,
}
outf.write(re.sub('\s+', ' ',
desc['print'].strip().format(**format))+'\n')
outf.write(re.sub('\s+', ' ',
desc['fail'].strip().format(**format))+'\n')
for op, comp in sorted(COMP.items()):
format.update({
'comp': comp.lower(), 'COMP': comp.upper(),
'op': op,
})
outf.write(re.sub('\s+', ' ',
desc['assert'].strip().format(**format))+'\n')
def mkassert(type, comp, lh, rh, size=None):
format = {
'type': type.lower(), 'TYPE': type.upper(),
'comp': comp.lower(), 'COMP': comp.upper(),
'prefix': PREFIX.lower(), 'PREFIX': PREFIX.upper(),
'lh': lh.strip(' '),
'rh': rh.strip(' '),
'size': size,
}
if size:
return ((ASSERT + '(__FILE__, __LINE__, {lh}, {rh}, {size})')
.format(**format))
else:
return ((ASSERT + '(__FILE__, __LINE__, {lh}, {rh})')
.format(**format))
# simple recursive descent parser
LEX = {
'ws': [r'(?:\s|\n|#.*?\n|//.*?\n|/\*.*?\*/)+'],
'assert': PATTERN,
'string': [r'"(?:\\.|[^"])*"', r"'(?:\\.|[^'])\'"],
'arrow': ['=>'],
'paren': ['\(', '\)'],
'op': ['strcmp', 'memcmp', '->'],
'comp': ['==', '!=', '<=', '>=', '<', '>'],
'logic': ['\&\&', '\|\|'],
'sep': [':', ';', '\{', '\}', ','],
}
class ParseFailure(Exception):
def __init__(self, expected, found):
self.expected = expected
self.found = found
def __str__(self):
return "expected %r, found %s..." % (
self.expected, repr(self.found)[:70])
class Parse:
def __init__(self, inf, lexemes):
p = '|'.join('(?P<%s>%s)' % (n, '|'.join(l))
for n, l in lexemes.items())
p = re.compile(p, re.DOTALL)
data = inf.read()
tokens = []
while True:
m = p.search(data)
if m:
if m.start() > 0:
tokens.append((None, data[:m.start()]))
tokens.append((m.lastgroup, m.group()))
data = data[m.end():]
else:
tokens.append((None, data))
break
self.tokens = tokens
self.off = 0
def lookahead(self, *pattern):
if self.off < len(self.tokens):
token = self.tokens[self.off]
if token[0] in pattern or token[1] in pattern:
self.m = token[1]
return self.m
self.m = None
return self.m
def accept(self, *patterns):
m = self.lookahead(*patterns)
if m is not None:
self.off += 1
return m
def expect(self, *patterns):
m = self.accept(*patterns)
if not m:
raise ParseFailure(patterns, self.tokens[self.off:])
return m
def push(self):
return self.off
def pop(self, state):
self.off = state
def passert(p):
def pastr(p):
p.expect('assert') ; p.accept('ws') ; p.expect('(') ; p.accept('ws')
p.expect('strcmp') ; p.accept('ws') ; p.expect('(') ; p.accept('ws')
lh = pexpr(p) ; p.accept('ws')
p.expect(',') ; p.accept('ws')
rh = pexpr(p) ; p.accept('ws')
p.expect(')') ; p.accept('ws')
comp = p.expect('comp') ; p.accept('ws')
p.expect('0') ; p.accept('ws')
p.expect(')')
return mkassert('str', COMP[comp], lh, rh)
def pamem(p):
p.expect('assert') ; p.accept('ws') ; p.expect('(') ; p.accept('ws')
p.expect('memcmp') ; p.accept('ws') ; p.expect('(') ; p.accept('ws')
lh = pexpr(p) ; p.accept('ws')
p.expect(',') ; p.accept('ws')
rh = pexpr(p) ; p.accept('ws')
p.expect(',') ; p.accept('ws')
size = pexpr(p) ; p.accept('ws')
p.expect(')') ; p.accept('ws')
comp = p.expect('comp') ; p.accept('ws')
p.expect('0') ; p.accept('ws')
p.expect(')')
return mkassert('mem', COMP[comp], lh, rh, size)
def paint(p):
p.expect('assert') ; p.accept('ws') ; p.expect('(') ; p.accept('ws')
lh = pexpr(p) ; p.accept('ws')
comp = p.expect('comp') ; p.accept('ws')
rh = pexpr(p) ; p.accept('ws')
p.expect(')')
return mkassert('int', COMP[comp], lh, rh)
def pabool(p):
p.expect('assert') ; p.accept('ws') ; p.expect('(') ; p.accept('ws')
lh = pexprs(p) ; p.accept('ws')
p.expect(')')
return mkassert('bool', 'eq', lh, 'true')
def pa(p):
return p.expect('assert')
state = p.push()
lastf = None
for pa in [pastr, pamem, paint, pabool, pa]:
try:
return pa(p)
except ParseFailure as f:
p.pop(state)
lastf = f
else:
raise lastf
def pexpr(p):
res = []
while True:
if p.accept('('):
res.append(p.m)
while True:
res.append(pexprs(p))
if p.accept('sep'):
res.append(p.m)
else:
break
res.append(p.expect(')'))
elif p.lookahead('assert'):
res.append(passert(p))
elif p.accept('assert', 'ws', 'string', 'op', None):
res.append(p.m)
else:
return ''.join(res)
def pexprs(p):
res = []
while True:
res.append(pexpr(p))
if p.accept('comp', 'logic', ','):
res.append(p.m)
else:
return ''.join(res)
def pstmt(p):
ws = p.accept('ws') or ''
lh = pexprs(p)
if p.accept('=>'):
rh = pexprs(p)
return ws + mkassert('int', 'eq', lh, rh)
else:
return ws + lh
def main(args):
inf = open(args.input, 'r') if args.input else sys.stdin
outf = open(args.output, 'w') if args.output else sys.stdout
lexemes = LEX.copy()
if args.pattern:
lexemes['assert'] = args.pattern
p = Parse(inf, lexemes)
# write extra verbose asserts
mkdecls(outf, maxwidth=args.maxwidth)
if args.input:
outf.write("#line %d \"%s\"\n" % (1, args.input))
# parse and write out stmt at a time
try:
while True:
outf.write(pstmt(p))
if p.accept('sep'):
outf.write(p.m)
else:
break
except ParseFailure as f:
pass
for i in range(p.off, len(p.tokens)):
outf.write(p.tokens[i][1])
if __name__ == "__main__":
import argparse
parser = argparse.ArgumentParser(
description="Cpp step that increases assert verbosity")
parser.add_argument('input', nargs='?',
help="Input C file after cpp.")
parser.add_argument('-o', '--output', required=True,
help="Output C file.")
parser.add_argument('-p', '--pattern', action='append',
help="Patterns to search for starting an assert statement.")
parser.add_argument('--maxwidth', default=MAXWIDTH, type=int,
help="Maximum number of characters to display for strcmp and memcmp.")
main(parser.parse_args())

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components/fs/littlefs/littlefs/scripts/prefix.py Executable file
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#!/usr/bin/env python2
# This script replaces prefixes of files, and symbols in that file.
# Useful for creating different versions of the codebase that don't
# conflict at compile time.
#
# example:
# $ ./scripts/prefix.py lfs2
import os
import os.path
import re
import glob
import itertools
import tempfile
import shutil
import subprocess
DEFAULT_PREFIX = "lfs"
def subn(from_prefix, to_prefix, name):
name, count1 = re.subn('\\b'+from_prefix, to_prefix, name)
name, count2 = re.subn('\\b'+from_prefix.upper(), to_prefix.upper(), name)
name, count3 = re.subn('\\B-D'+from_prefix.upper(),
'-D'+to_prefix.upper(), name)
return name, count1+count2+count3
def main(from_prefix, to_prefix=None, files=None):
if not to_prefix:
from_prefix, to_prefix = DEFAULT_PREFIX, from_prefix
if not files:
files = subprocess.check_output([
'git', 'ls-tree', '-r', '--name-only', 'HEAD']).split()
for oldname in files:
# Rename any matching file names
newname, namecount = subn(from_prefix, to_prefix, oldname)
if namecount:
subprocess.check_call(['git', 'mv', oldname, newname])
# Rename any prefixes in file
count = 0
with open(newname+'~', 'w') as tempf:
with open(newname) as newf:
for line in newf:
line, n = subn(from_prefix, to_prefix, line)
count += n
tempf.write(line)
shutil.copystat(newname, newname+'~')
os.rename(newname+'~', newname)
subprocess.check_call(['git', 'add', newname])
# Summary
print '%s: %d replacements' % (
'%s -> %s' % (oldname, newname) if namecount else oldname,
count)
if __name__ == "__main__":
import sys
sys.exit(main(*sys.argv[1:]))

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components/fs/littlefs/littlefs/scripts/readblock.py Executable file
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#!/usr/bin/env python3
import subprocess as sp
def main(args):
with open(args.disk, 'rb') as f:
f.seek(args.block * args.block_size)
block = (f.read(args.block_size)
.ljust(args.block_size, b'\xff'))
# what did you expect?
print("%-8s %-s" % ('off', 'data'))
return sp.run(['xxd', '-g1', '-'], input=block).returncode
if __name__ == "__main__":
import argparse
import sys
parser = argparse.ArgumentParser(
description="Hex dump a specific block in a disk.")
parser.add_argument('disk',
help="File representing the block device.")
parser.add_argument('block_size', type=lambda x: int(x, 0),
help="Size of a block in bytes.")
parser.add_argument('block', type=lambda x: int(x, 0),
help="Address of block to dump.")
sys.exit(main(parser.parse_args()))

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components/fs/littlefs/littlefs/scripts/readmdir.py Executable file
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#!/usr/bin/env python3
import struct
import binascii
import sys
import itertools as it
TAG_TYPES = {
'splice': (0x700, 0x400),
'create': (0x7ff, 0x401),
'delete': (0x7ff, 0x4ff),
'name': (0x700, 0x000),
'reg': (0x7ff, 0x001),
'dir': (0x7ff, 0x002),
'superblock': (0x7ff, 0x0ff),
'struct': (0x700, 0x200),
'dirstruct': (0x7ff, 0x200),
'ctzstruct': (0x7ff, 0x202),
'inlinestruct': (0x7ff, 0x201),
'userattr': (0x700, 0x300),
'tail': (0x700, 0x600),
'softtail': (0x7ff, 0x600),
'hardtail': (0x7ff, 0x601),
'gstate': (0x700, 0x700),
'movestate': (0x7ff, 0x7ff),
'crc': (0x700, 0x500),
}
class Tag:
def __init__(self, *args):
if len(args) == 1:
self.tag = args[0]
elif len(args) == 3:
if isinstance(args[0], str):
type = TAG_TYPES[args[0]][1]
else:
type = args[0]
if isinstance(args[1], str):
id = int(args[1], 0) if args[1] not in 'x.' else 0x3ff
else:
id = args[1]
if isinstance(args[2], str):
size = int(args[2], str) if args[2] not in 'x.' else 0x3ff
else:
size = args[2]
self.tag = (type << 20) | (id << 10) | size
else:
assert False
@property
def isvalid(self):
return not bool(self.tag & 0x80000000)
@property
def isattr(self):
return not bool(self.tag & 0x40000000)
@property
def iscompactable(self):
return bool(self.tag & 0x20000000)
@property
def isunique(self):
return not bool(self.tag & 0x10000000)
@property
def type(self):
return (self.tag & 0x7ff00000) >> 20
@property
def type1(self):
return (self.tag & 0x70000000) >> 20
@property
def type3(self):
return (self.tag & 0x7ff00000) >> 20
@property
def id(self):
return (self.tag & 0x000ffc00) >> 10
@property
def size(self):
return (self.tag & 0x000003ff) >> 0
@property
def dsize(self):
return 4 + (self.size if self.size != 0x3ff else 0)
@property
def chunk(self):
return self.type & 0xff
@property
def schunk(self):
return struct.unpack('b', struct.pack('B', self.chunk))[0]
def is_(self, type):
return (self.type & TAG_TYPES[type][0]) == TAG_TYPES[type][1]
def mkmask(self):
return Tag(
0x700 if self.isunique else 0x7ff,
0x3ff if self.isattr else 0,
0)
def chid(self, nid):
ntag = Tag(self.type, nid, self.size)
if hasattr(self, 'off'): ntag.off = self.off
if hasattr(self, 'data'): ntag.data = self.data
if hasattr(self, 'crc'): ntag.crc = self.crc
return ntag
def typerepr(self):
if self.is_('crc') and getattr(self, 'crc', 0xffffffff) != 0xffffffff:
return 'crc (bad)'
reverse_types = {v: k for k, v in TAG_TYPES.items()}
for prefix in range(12):
mask = 0x7ff & ~((1 << prefix)-1)
if (mask, self.type & mask) in reverse_types:
type = reverse_types[mask, self.type & mask]
if prefix > 0:
return '%s %#0*x' % (
type, prefix//4, self.type & ((1 << prefix)-1))
else:
return type
else:
return '%02x' % self.type
def idrepr(self):
return repr(self.id) if self.id != 0x3ff else '.'
def sizerepr(self):
return repr(self.size) if self.size != 0x3ff else 'x'
def __repr__(self):
return 'Tag(%r, %d, %d)' % (self.typerepr(), self.id, self.size)
def __lt__(self, other):
return (self.id, self.type) < (other.id, other.type)
def __bool__(self):
return self.isvalid
def __int__(self):
return self.tag
def __index__(self):
return self.tag
class MetadataPair:
def __init__(self, blocks):
if len(blocks) > 1:
self.pair = [MetadataPair([block]) for block in blocks]
self.pair = sorted(self.pair, reverse=True)
self.data = self.pair[0].data
self.rev = self.pair[0].rev
self.tags = self.pair[0].tags
self.ids = self.pair[0].ids
self.log = self.pair[0].log
self.all_ = self.pair[0].all_
return
self.pair = [self]
self.data = blocks[0]
block = self.data
self.rev, = struct.unpack('<I', block[0:4])
crc = binascii.crc32(block[0:4])
# parse tags
corrupt = False
tag = Tag(0xffffffff)
off = 4
self.log = []
self.all_ = []
while len(block) - off >= 4:
ntag, = struct.unpack('>I', block[off:off+4])
tag = Tag(int(tag) ^ ntag)
tag.off = off + 4
tag.data = block[off+4:off+tag.dsize]
if tag.is_('crc'):
crc = binascii.crc32(block[off:off+4+4], crc)
else:
crc = binascii.crc32(block[off:off+tag.dsize], crc)
tag.crc = crc
off += tag.dsize
self.all_.append(tag)
if tag.is_('crc'):
# is valid commit?
if crc != 0xffffffff:
corrupt = True
if not corrupt:
self.log = self.all_.copy()
# reset tag parsing
crc = 0
tag = Tag(int(tag) ^ ((tag.type & 1) << 31))
# find active ids
self.ids = list(it.takewhile(
lambda id: Tag('name', id, 0) in self,
it.count()))
# find most recent tags
self.tags = []
for tag in self.log:
if tag.is_('crc') or tag.is_('splice'):
continue
elif tag.id == 0x3ff:
if tag in self and self[tag] is tag:
self.tags.append(tag)
else:
# id could have change, I know this is messy and slow
# but it works
for id in self.ids:
ntag = tag.chid(id)
if ntag in self and self[ntag] is tag:
self.tags.append(ntag)
self.tags = sorted(self.tags)
def __bool__(self):
return bool(self.log)
def __lt__(self, other):
# corrupt blocks don't count
if not self or not other:
return bool(other)
# use sequence arithmetic to avoid overflow
return not ((other.rev - self.rev) & 0x80000000)
def __contains__(self, args):
try:
self[args]
return True
except KeyError:
return False
def __getitem__(self, args):
if isinstance(args, tuple):
gmask, gtag = args
else:
gmask, gtag = args.mkmask(), args
gdiff = 0
for tag in reversed(self.log):
if (gmask.id != 0 and tag.is_('splice') and
tag.id <= gtag.id - gdiff):
if tag.is_('create') and tag.id == gtag.id - gdiff:
# creation point
break
gdiff += tag.schunk
if ((int(gmask) & int(tag)) ==
(int(gmask) & int(gtag.chid(gtag.id - gdiff)))):
if tag.size == 0x3ff:
# deleted
break
return tag
raise KeyError(gmask, gtag)
def _dump_tags(self, tags, f=sys.stdout, truncate=True):
f.write("%-8s %-8s %-13s %4s %4s" % (
'off', 'tag', 'type', 'id', 'len'))
if truncate:
f.write(' data (truncated)')
f.write('\n')
for tag in tags:
f.write("%08x: %08x %-13s %4s %4s" % (
tag.off, tag,
tag.typerepr(), tag.idrepr(), tag.sizerepr()))
if truncate:
f.write(" %-23s %-8s\n" % (
' '.join('%02x' % c for c in tag.data[:8]),
''.join(c if c >= ' ' and c <= '~' else '.'
for c in map(chr, tag.data[:8]))))
else:
f.write("\n")
for i in range(0, len(tag.data), 16):
f.write(" %08x: %-47s %-16s\n" % (
tag.off+i,
' '.join('%02x' % c for c in tag.data[i:i+16]),
''.join(c if c >= ' ' and c <= '~' else '.'
for c in map(chr, tag.data[i:i+16]))))
def dump_tags(self, f=sys.stdout, truncate=True):
self._dump_tags(self.tags, f=f, truncate=truncate)
def dump_log(self, f=sys.stdout, truncate=True):
self._dump_tags(self.log, f=f, truncate=truncate)
def dump_all(self, f=sys.stdout, truncate=True):
self._dump_tags(self.all_, f=f, truncate=truncate)
def main(args):
blocks = []
with open(args.disk, 'rb') as f:
for block in [args.block1, args.block2]:
if block is None:
continue
f.seek(block * args.block_size)
blocks.append(f.read(args.block_size)
.ljust(args.block_size, b'\xff'))
# find most recent pair
mdir = MetadataPair(blocks)
try:
mdir.tail = mdir[Tag('tail', 0, 0)]
if mdir.tail.size != 8 or mdir.tail.data == 8*b'\xff':
mdir.tail = None
except KeyError:
mdir.tail = None
print("mdir {%s} rev %d%s%s%s" % (
', '.join('%#x' % b
for b in [args.block1, args.block2]
if b is not None),
mdir.rev,
' (was %s)' % ', '.join('%d' % m.rev for m in mdir.pair[1:])
if len(mdir.pair) > 1 else '',
' (corrupted!)' if not mdir else '',
' -> {%#x, %#x}' % struct.unpack('<II', mdir.tail.data)
if mdir.tail else ''))
if args.all:
mdir.dump_all(truncate=not args.no_truncate)
elif args.log:
mdir.dump_log(truncate=not args.no_truncate)
else:
mdir.dump_tags(truncate=not args.no_truncate)
return 0 if mdir else 1
if __name__ == "__main__":
import argparse
import sys
parser = argparse.ArgumentParser(
description="Dump useful info about metadata pairs in littlefs.")
parser.add_argument('disk',
help="File representing the block device.")
parser.add_argument('block_size', type=lambda x: int(x, 0),
help="Size of a block in bytes.")
parser.add_argument('block1', type=lambda x: int(x, 0),
help="First block address for finding the metadata pair.")
parser.add_argument('block2', nargs='?', type=lambda x: int(x, 0),
help="Second block address for finding the metadata pair.")
parser.add_argument('-l', '--log', action='store_true',
help="Show tags in log.")
parser.add_argument('-a', '--all', action='store_true',
help="Show all tags in log, included tags in corrupted commits.")
parser.add_argument('-T', '--no-truncate', action='store_true',
help="Don't truncate large amounts of data.")
sys.exit(main(parser.parse_args()))

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components/fs/littlefs/littlefs/scripts/readtree.py Executable file
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#!/usr/bin/env python3
import struct
import sys
import json
import io
import itertools as it
from readmdir import Tag, MetadataPair
def main(args):
superblock = None
gstate = b'\0\0\0\0\0\0\0\0\0\0\0\0'
dirs = []
mdirs = []
corrupted = []
cycle = False
with open(args.disk, 'rb') as f:
tail = (args.block1, args.block2)
hard = False
while True:
for m in it.chain((m for d in dirs for m in d), mdirs):
if set(m.blocks) == set(tail):
# cycle detected
cycle = m.blocks
if cycle:
break
# load mdir
data = []
blocks = {}
for block in tail:
f.seek(block * args.block_size)
data.append(f.read(args.block_size)
.ljust(args.block_size, b'\xff'))
blocks[id(data[-1])] = block
mdir = MetadataPair(data)
mdir.blocks = tuple(blocks[id(p.data)] for p in mdir.pair)
# fetch some key metadata as a we scan
try:
mdir.tail = mdir[Tag('tail', 0, 0)]
if mdir.tail.size != 8 or mdir.tail.data == 8*b'\xff':
mdir.tail = None
except KeyError:
mdir.tail = None
# have superblock?
try:
nsuperblock = mdir[
Tag(0x7ff, 0x3ff, 0), Tag('superblock', 0, 0)]
superblock = nsuperblock, mdir[Tag('inlinestruct', 0, 0)]
except KeyError:
pass
# have gstate?
try:
ngstate = mdir[Tag('movestate', 0, 0)]
gstate = bytes((a or 0) ^ (b or 0)
for a,b in it.zip_longest(gstate, ngstate.data))
except KeyError:
pass
# corrupted?
if not mdir:
corrupted.append(mdir)
# add to directories
mdirs.append(mdir)
if mdir.tail is None or not mdir.tail.is_('hardtail'):
dirs.append(mdirs)
mdirs = []
if mdir.tail is None:
break
tail = struct.unpack('<II', mdir.tail.data)
hard = mdir.tail.is_('hardtail')
# find paths
dirtable = {}
for dir in dirs:
dirtable[frozenset(dir[0].blocks)] = dir
pending = [("/", dirs[0])]
while pending:
path, dir = pending.pop(0)
for mdir in dir:
for tag in mdir.tags:
if tag.is_('dir'):
try:
npath = tag.data.decode('utf8')
dirstruct = mdir[Tag('dirstruct', tag.id, 0)]
nblocks = struct.unpack('<II', dirstruct.data)
nmdir = dirtable[frozenset(nblocks)]
pending.append(((path + '/' + npath), nmdir))
except KeyError:
pass
dir[0].path = path.replace('//', '/')
# print littlefs + version info
version = ('?', '?')
if superblock:
version = tuple(reversed(
struct.unpack('<HH', superblock[1].data[0:4].ljust(4, b'\xff'))))
print("%-47s%s" % ("littlefs v%s.%s" % version,
"data (truncated, if it fits)"
if not any([args.no_truncate, args.log, args.all]) else ""))
# print gstate
print("gstate 0x%s" % ''.join('%02x' % c for c in gstate))
tag = Tag(struct.unpack('<I', gstate[0:4].ljust(4, b'\xff'))[0])
blocks = struct.unpack('<II', gstate[4:4+8].ljust(8, b'\xff'))
if tag.size or not tag.isvalid:
print(" orphans >=%d" % max(tag.size, 1))
if tag.type:
print(" move dir {%#x, %#x} id %d" % (
blocks[0], blocks[1], tag.id))
# print mdir info
for i, dir in enumerate(dirs):
print("dir %s" % (json.dumps(dir[0].path)
if hasattr(dir[0], 'path') else '(orphan)'))
for j, mdir in enumerate(dir):
print("mdir {%#x, %#x} rev %d (was %d)%s%s" % (
mdir.blocks[0], mdir.blocks[1], mdir.rev, mdir.pair[1].rev,
' (corrupted!)' if not mdir else '',
' -> {%#x, %#x}' % struct.unpack('<II', mdir.tail.data)
if mdir.tail else ''))
f = io.StringIO()
if args.log:
mdir.dump_log(f, truncate=not args.no_truncate)
elif args.all:
mdir.dump_all(f, truncate=not args.no_truncate)
else:
mdir.dump_tags(f, truncate=not args.no_truncate)
lines = list(filter(None, f.getvalue().split('\n')))
for k, line in enumerate(lines):
print("%s %s" % (
' ' if j == len(dir)-1 else
'v' if k == len(lines)-1 else
'|',
line))
errcode = 0
for mdir in corrupted:
errcode = errcode or 1
print("*** corrupted mdir {%#x, %#x}! ***" % (
mdir.blocks[0], mdir.blocks[1]))
if cycle:
errcode = errcode or 2
print("*** cycle detected {%#x, %#x}! ***" % (
cycle[0], cycle[1]))
return errcode
if __name__ == "__main__":
import argparse
import sys
parser = argparse.ArgumentParser(
description="Dump semantic info about the metadata tree in littlefs")
parser.add_argument('disk',
help="File representing the block device.")
parser.add_argument('block_size', type=lambda x: int(x, 0),
help="Size of a block in bytes.")
parser.add_argument('block1', nargs='?', default=0,
type=lambda x: int(x, 0),
help="Optional first block address for finding the superblock.")
parser.add_argument('block2', nargs='?', default=1,
type=lambda x: int(x, 0),
help="Optional second block address for finding the superblock.")
parser.add_argument('-l', '--log', action='store_true',
help="Show tags in log.")
parser.add_argument('-a', '--all', action='store_true',
help="Show all tags in log, included tags in corrupted commits.")
parser.add_argument('-T', '--no-truncate', action='store_true',
help="Show the full contents of files/attrs/tags.")
sys.exit(main(parser.parse_args()))

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components/fs/littlefs/littlefs/scripts/stack.py Executable file
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#!/usr/bin/env python3
#
# Script to find stack usage at the function level. Will detect recursion and
# report as infinite stack usage.
#
import os
import glob
import itertools as it
import re
import csv
import collections as co
import math as m
CI_PATHS = ['*.ci']
def collect(paths, **args):
# parse the vcg format
k_pattern = re.compile('([a-z]+)\s*:', re.DOTALL)
v_pattern = re.compile('(?:"(.*?)"|([a-z]+))', re.DOTALL)
def parse_vcg(rest):
def parse_vcg(rest):
node = []
while True:
rest = rest.lstrip()
m = k_pattern.match(rest)
if not m:
return (node, rest)
k, rest = m.group(1), rest[m.end(0):]
rest = rest.lstrip()
if rest.startswith('{'):
v, rest = parse_vcg(rest[1:])
assert rest[0] == '}', "unexpected %r" % rest[0:1]
rest = rest[1:]
node.append((k, v))
else:
m = v_pattern.match(rest)
assert m, "unexpected %r" % rest[0:1]
v, rest = m.group(1) or m.group(2), rest[m.end(0):]
node.append((k, v))
node, rest = parse_vcg(rest)
assert rest == '', "unexpected %r" % rest[0:1]
return node
# collect into functions
results = co.defaultdict(lambda: (None, None, 0, set()))
f_pattern = re.compile(
r'([^\\]*)\\n([^:]*)[^\\]*\\n([0-9]+) bytes \((.*)\)')
for path in paths:
with open(path) as f:
vcg = parse_vcg(f.read())
for k, graph in vcg:
if k != 'graph':
continue
for k, info in graph:
if k == 'node':
info = dict(info)
m = f_pattern.match(info['label'])
if m:
function, file, size, type = m.groups()
if not args.get('quiet') and type != 'static':
print('warning: found non-static stack for %s (%s)'
% (function, type))
_, _, _, targets = results[info['title']]
results[info['title']] = (
file, function, int(size), targets)
elif k == 'edge':
info = dict(info)
_, _, _, targets = results[info['sourcename']]
targets.add(info['targetname'])
else:
continue
if not args.get('everything'):
for source, (s_file, s_function, _, _) in list(results.items()):
# discard internal functions
if s_file.startswith('<') or s_file.startswith('/usr/include'):
del results[source]
# find maximum stack size recursively, this requires also detecting cycles
# (in case of recursion)
def find_limit(source, seen=None):
seen = seen or set()
if source not in results:
return 0
_, _, frame, targets = results[source]
limit = 0
for target in targets:
if target in seen:
# found a cycle
return float('inf')
limit_ = find_limit(target, seen | {target})
limit = max(limit, limit_)
return frame + limit
def find_deps(targets):
deps = set()
for target in targets:
if target in results:
t_file, t_function, _, _ = results[target]
deps.add((t_file, t_function))
return deps
# flatten into a list
flat_results = []
for source, (s_file, s_function, frame, targets) in results.items():
limit = find_limit(source)
deps = find_deps(targets)
flat_results.append((s_file, s_function, frame, limit, deps))
return flat_results
def main(**args):
def openio(path, mode='r'):
if path == '-':
if 'r' in mode:
return os.fdopen(os.dup(sys.stdin.fileno()), 'r')
else:
return os.fdopen(os.dup(sys.stdout.fileno()), 'w')
else:
return open(path, mode)
# find sizes
if not args.get('use', None):
# find .ci files
paths = []
for path in args['ci_paths']:
if os.path.isdir(path):
path = path + '/*.ci'
for path in glob.glob(path):
paths.append(path)
if not paths:
print('no .ci files found in %r?' % args['ci_paths'])
sys.exit(-1)
results = collect(paths, **args)
else:
with openio(args['use']) as f:
r = csv.DictReader(f)
results = [
( result['file'],
result['name'],
int(result['stack_frame']),
float(result['stack_limit']), # note limit can be inf
set())
for result in r
if result.get('stack_frame') not in {None, ''}
if result.get('stack_limit') not in {None, ''}]
total_frame = 0
total_limit = 0
for _, _, frame, limit, _ in results:
total_frame += frame
total_limit = max(total_limit, limit)
# find previous results?
if args.get('diff'):
try:
with openio(args['diff']) as f:
r = csv.DictReader(f)
prev_results = [
( result['file'],
result['name'],
int(result['stack_frame']),
float(result['stack_limit']),
set())
for result in r
if result.get('stack_frame') not in {None, ''}
if result.get('stack_limit') not in {None, ''}]
except FileNotFoundError:
prev_results = []
prev_total_frame = 0
prev_total_limit = 0
for _, _, frame, limit, _ in prev_results:
prev_total_frame += frame
prev_total_limit = max(prev_total_limit, limit)
# write results to CSV
if args.get('output'):
merged_results = co.defaultdict(lambda: {})
other_fields = []
# merge?
if args.get('merge'):
try:
with openio(args['merge']) as f:
r = csv.DictReader(f)
for result in r:
file = result.pop('file', '')
func = result.pop('name', '')
result.pop('stack_frame', None)
result.pop('stack_limit', None)
merged_results[(file, func)] = result
other_fields = result.keys()
except FileNotFoundError:
pass
for file, func, frame, limit, _ in results:
merged_results[(file, func)]['stack_frame'] = frame
merged_results[(file, func)]['stack_limit'] = limit
with openio(args['output'], 'w') as f:
w = csv.DictWriter(f, ['file', 'name', *other_fields, 'stack_frame', 'stack_limit'])
w.writeheader()
for (file, func), result in sorted(merged_results.items()):
w.writerow({'file': file, 'name': func, **result})
# print results
def dedup_entries(results, by='name'):
entries = co.defaultdict(lambda: (0, 0, set()))
for file, func, frame, limit, deps in results:
entry = (file if by == 'file' else func)
entry_frame, entry_limit, entry_deps = entries[entry]
entries[entry] = (
entry_frame + frame,
max(entry_limit, limit),
entry_deps | {file if by == 'file' else func
for file, func in deps})
return entries
def diff_entries(olds, news):
diff = co.defaultdict(lambda: (None, None, None, None, 0, 0, 0, set()))
for name, (new_frame, new_limit, deps) in news.items():
diff[name] = (
None, None,
new_frame, new_limit,
new_frame, new_limit,
1.0,
deps)
for name, (old_frame, old_limit, _) in olds.items():
_, _, new_frame, new_limit, _, _, _, deps = diff[name]
diff[name] = (
old_frame, old_limit,
new_frame, new_limit,
(new_frame or 0) - (old_frame or 0),
0 if m.isinf(new_limit or 0) and m.isinf(old_limit or 0)
else (new_limit or 0) - (old_limit or 0),
0.0 if m.isinf(new_limit or 0) and m.isinf(old_limit or 0)
else +float('inf') if m.isinf(new_limit or 0)
else -float('inf') if m.isinf(old_limit or 0)
else +0.0 if not old_limit and not new_limit
else +1.0 if not old_limit
else ((new_limit or 0) - (old_limit or 0))/(old_limit or 0),
deps)
return diff
def sorted_entries(entries):
if args.get('limit_sort'):
return sorted(entries, key=lambda x: (-x[1][1], x))
elif args.get('reverse_limit_sort'):
return sorted(entries, key=lambda x: (+x[1][1], x))
elif args.get('frame_sort'):
return sorted(entries, key=lambda x: (-x[1][0], x))
elif args.get('reverse_frame_sort'):
return sorted(entries, key=lambda x: (+x[1][0], x))
else:
return sorted(entries)
def sorted_diff_entries(entries):
if args.get('limit_sort'):
return sorted(entries, key=lambda x: (-(x[1][3] or 0), x))
elif args.get('reverse_limit_sort'):
return sorted(entries, key=lambda x: (+(x[1][3] or 0), x))
elif args.get('frame_sort'):
return sorted(entries, key=lambda x: (-(x[1][2] or 0), x))
elif args.get('reverse_frame_sort'):
return sorted(entries, key=lambda x: (+(x[1][2] or 0), x))
else:
return sorted(entries, key=lambda x: (-x[1][6], x))
def print_header(by=''):
if not args.get('diff'):
print('%-36s %7s %7s' % (by, 'frame', 'limit'))
else:
print('%-36s %15s %15s %15s' % (by, 'old', 'new', 'diff'))
def print_entry(name, frame, limit):
print("%-36s %7d %7s" % (name,
frame, '∞' if m.isinf(limit) else int(limit)))
def print_diff_entry(name,
old_frame, old_limit,
new_frame, new_limit,
diff_frame, diff_limit,
ratio):
print('%-36s %7s %7s %7s %7s %+7d %7s%s' % (name,
old_frame if old_frame is not None else "-",
('∞' if m.isinf(old_limit) else int(old_limit))
if old_limit is not None else "-",
new_frame if new_frame is not None else "-",
('∞' if m.isinf(new_limit) else int(new_limit))
if new_limit is not None else "-",
diff_frame,
('+∞' if diff_limit > 0 and m.isinf(diff_limit)
else '-∞' if diff_limit < 0 and m.isinf(diff_limit)
else '%+d' % diff_limit),
'' if not ratio
else ' (+∞%)' if ratio > 0 and m.isinf(ratio)
else ' (-∞%)' if ratio < 0 and m.isinf(ratio)
else ' (%+.1f%%)' % (100*ratio)))
def print_entries(by='name'):
# build optional tree of dependencies
def print_deps(entries, depth, print,
filter=lambda _: True,
prefixes=('', '', '', '')):
entries = entries if isinstance(entries, list) else list(entries)
filtered_entries = [(name, entry)
for name, entry in entries
if filter(name)]
for i, (name, entry) in enumerate(filtered_entries):
last = (i == len(filtered_entries)-1)
print(prefixes[0+last] + name, entry)
if depth > 0:
deps = entry[-1]
print_deps(entries, depth-1, print,
lambda name: name in deps,
( prefixes[2+last] + "|-> ",
prefixes[2+last] + "'-> ",
prefixes[2+last] + "| ",
prefixes[2+last] + " "))
entries = dedup_entries(results, by=by)
if not args.get('diff'):
print_header(by=by)
print_deps(
sorted_entries(entries.items()),
args.get('depth') or 0,
lambda name, entry: print_entry(name, *entry[:-1]))
else:
prev_entries = dedup_entries(prev_results, by=by)
diff = diff_entries(prev_entries, entries)
print_header(by='%s (%d added, %d removed)' % (by,
sum(1 for _, old, _, _, _, _, _, _ in diff.values() if old is None),
sum(1 for _, _, _, new, _, _, _, _ in diff.values() if new is None)))
print_deps(
filter(
lambda x: x[1][6] or args.get('all'),
sorted_diff_entries(diff.items())),
args.get('depth') or 0,
lambda name, entry: print_diff_entry(name, *entry[:-1]))
def print_totals():
if not args.get('diff'):
print_entry('TOTAL', total_frame, total_limit)
else:
diff_frame = total_frame - prev_total_frame
diff_limit = (
0 if m.isinf(total_limit or 0) and m.isinf(prev_total_limit or 0)
else (total_limit or 0) - (prev_total_limit or 0))
ratio = (
0.0 if m.isinf(total_limit or 0) and m.isinf(prev_total_limit or 0)
else +float('inf') if m.isinf(total_limit or 0)
else -float('inf') if m.isinf(prev_total_limit or 0)
else 0.0 if not prev_total_limit and not total_limit
else 1.0 if not prev_total_limit
else ((total_limit or 0) - (prev_total_limit or 0))/(prev_total_limit or 0))
print_diff_entry('TOTAL',
prev_total_frame, prev_total_limit,
total_frame, total_limit,
diff_frame, diff_limit,
ratio)
if args.get('quiet'):
pass
elif args.get('summary'):
print_header()
print_totals()
elif args.get('files'):
print_entries(by='file')
print_totals()
else:
print_entries(by='name')
print_totals()
if __name__ == "__main__":
import argparse
import sys
parser = argparse.ArgumentParser(
description="Find stack usage at the function level.")
parser.add_argument('ci_paths', nargs='*', default=CI_PATHS,
help="Description of where to find *.ci files. May be a directory \
or a list of paths. Defaults to %r." % CI_PATHS)
parser.add_argument('-v', '--verbose', action='store_true',
help="Output commands that run behind the scenes.")
parser.add_argument('-q', '--quiet', action='store_true',
help="Don't show anything, useful with -o.")
parser.add_argument('-o', '--output',
help="Specify CSV file to store results.")
parser.add_argument('-u', '--use',
help="Don't parse callgraph files, instead use this CSV file.")
parser.add_argument('-d', '--diff',
help="Specify CSV file to diff against.")
parser.add_argument('-m', '--merge',
help="Merge with an existing CSV file when writing to output.")
parser.add_argument('-a', '--all', action='store_true',
help="Show all functions, not just the ones that changed.")
parser.add_argument('-A', '--everything', action='store_true',
help="Include builtin and libc specific symbols.")
parser.add_argument('-s', '--limit-sort', action='store_true',
help="Sort by stack limit.")
parser.add_argument('-S', '--reverse-limit-sort', action='store_true',
help="Sort by stack limit, but backwards.")
parser.add_argument('--frame-sort', action='store_true',
help="Sort by stack frame size.")
parser.add_argument('--reverse-frame-sort', action='store_true',
help="Sort by stack frame size, but backwards.")
parser.add_argument('-L', '--depth', default=0, type=lambda x: int(x, 0),
nargs='?', const=float('inf'),
help="Depth of dependencies to show.")
parser.add_argument('-F', '--files', action='store_true',
help="Show file-level calls.")
parser.add_argument('-Y', '--summary', action='store_true',
help="Only show the total stack size.")
parser.add_argument('--build-dir',
help="Specify the relative build directory. Used to map object files \
to the correct source files.")
sys.exit(main(**vars(parser.parse_args())))

331
components/fs/littlefs/littlefs/scripts/structs.py Executable file
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#!/usr/bin/env python3
#
# Script to find struct sizes.
#
import os
import glob
import itertools as it
import subprocess as sp
import shlex
import re
import csv
import collections as co
OBJ_PATHS = ['*.o']
def collect(paths, **args):
decl_pattern = re.compile(
'^\s+(?P<no>[0-9]+)'
'\s+(?P<dir>[0-9]+)'
'\s+.*'
'\s+(?P<file>[^\s]+)$')
struct_pattern = re.compile(
'^(?:.*DW_TAG_(?P<tag>[a-z_]+).*'
'|^.*DW_AT_name.*:\s*(?P<name>[^:\s]+)\s*'
'|^.*DW_AT_decl_file.*:\s*(?P<decl>[0-9]+)\s*'
'|^.*DW_AT_byte_size.*:\s*(?P<size>[0-9]+)\s*)$')
results = co.defaultdict(lambda: 0)
for path in paths:
# find decl, we want to filter by structs in .h files
decls = {}
# note objdump-tool may contain extra args
cmd = args['objdump_tool'] + ['--dwarf=rawline', path]
if args.get('verbose'):
print(' '.join(shlex.quote(c) for c in cmd))
proc = sp.Popen(cmd,
stdout=sp.PIPE,
stderr=sp.PIPE if not args.get('verbose') else None,
universal_newlines=True,
errors='replace')
for line in proc.stdout:
# find file numbers
m = decl_pattern.match(line)
if m:
decls[int(m.group('no'))] = m.group('file')
proc.wait()
if proc.returncode != 0:
if not args.get('verbose'):
for line in proc.stderr:
sys.stdout.write(line)
sys.exit(-1)
# collect structs as we parse dwarf info
found = False
name = None
decl = None
size = None
# note objdump-tool may contain extra args
cmd = args['objdump_tool'] + ['--dwarf=info', path]
if args.get('verbose'):
print(' '.join(shlex.quote(c) for c in cmd))
proc = sp.Popen(cmd,
stdout=sp.PIPE,
stderr=sp.PIPE if not args.get('verbose') else None,
universal_newlines=True,
errors='replace')
for line in proc.stdout:
# state machine here to find structs
m = struct_pattern.match(line)
if m:
if m.group('tag'):
if (name is not None
and decl is not None
and size is not None):
decl = decls.get(decl, '?')
results[(decl, name)] = size
found = (m.group('tag') == 'structure_type')
name = None
decl = None
size = None
elif found and m.group('name'):
name = m.group('name')
elif found and name and m.group('decl'):
decl = int(m.group('decl'))
elif found and name and m.group('size'):
size = int(m.group('size'))
proc.wait()
if proc.returncode != 0:
if not args.get('verbose'):
for line in proc.stderr:
sys.stdout.write(line)
sys.exit(-1)
flat_results = []
for (file, struct), size in results.items():
# map to source files
if args.get('build_dir'):
file = re.sub('%s/*' % re.escape(args['build_dir']), '', file)
# only include structs declared in header files in the current
# directory, ignore internal-only # structs (these are represented
# in other measurements)
if not args.get('everything'):
if not file.endswith('.h'):
continue
# replace .o with .c, different scripts report .o/.c, we need to
# choose one if we want to deduplicate csv files
file = re.sub('\.o$', '.c', file)
flat_results.append((file, struct, size))
return flat_results
def main(**args):
def openio(path, mode='r'):
if path == '-':
if 'r' in mode:
return os.fdopen(os.dup(sys.stdin.fileno()), 'r')
else:
return os.fdopen(os.dup(sys.stdout.fileno()), 'w')
else:
return open(path, mode)
# find sizes
if not args.get('use', None):
# find .o files
paths = []
for path in args['obj_paths']:
if os.path.isdir(path):
path = path + '/*.o'
for path in glob.glob(path):
paths.append(path)
if not paths:
print('no .obj files found in %r?' % args['obj_paths'])
sys.exit(-1)
results = collect(paths, **args)
else:
with openio(args['use']) as f:
r = csv.DictReader(f)
results = [
( result['file'],
result['name'],
int(result['struct_size']))
for result in r
if result.get('struct_size') not in {None, ''}]
total = 0
for _, _, size in results:
total += size
# find previous results?
if args.get('diff'):
try:
with openio(args['diff']) as f:
r = csv.DictReader(f)
prev_results = [
( result['file'],
result['name'],
int(result['struct_size']))
for result in r
if result.get('struct_size') not in {None, ''}]
except FileNotFoundError:
prev_results = []
prev_total = 0
for _, _, size in prev_results:
prev_total += size
# write results to CSV
if args.get('output'):
merged_results = co.defaultdict(lambda: {})
other_fields = []
# merge?
if args.get('merge'):
try:
with openio(args['merge']) as f:
r = csv.DictReader(f)
for result in r:
file = result.pop('file', '')
struct = result.pop('name', '')
result.pop('struct_size', None)
merged_results[(file, struct)] = result
other_fields = result.keys()
except FileNotFoundError:
pass
for file, struct, size in results:
merged_results[(file, struct)]['struct_size'] = size
with openio(args['output'], 'w') as f:
w = csv.DictWriter(f, ['file', 'name', *other_fields, 'struct_size'])
w.writeheader()
for (file, struct), result in sorted(merged_results.items()):
w.writerow({'file': file, 'name': struct, **result})
# print results
def dedup_entries(results, by='name'):
entries = co.defaultdict(lambda: 0)
for file, struct, size in results:
entry = (file if by == 'file' else struct)
entries[entry] += size
return entries
def diff_entries(olds, news):
diff = co.defaultdict(lambda: (0, 0, 0, 0))
for name, new in news.items():
diff[name] = (0, new, new, 1.0)
for name, old in olds.items():
_, new, _, _ = diff[name]
diff[name] = (old, new, new-old, (new-old)/old if old else 1.0)
return diff
def sorted_entries(entries):
if args.get('size_sort'):
return sorted(entries, key=lambda x: (-x[1], x))
elif args.get('reverse_size_sort'):
return sorted(entries, key=lambda x: (+x[1], x))
else:
return sorted(entries)
def sorted_diff_entries(entries):
if args.get('size_sort'):
return sorted(entries, key=lambda x: (-x[1][1], x))
elif args.get('reverse_size_sort'):
return sorted(entries, key=lambda x: (+x[1][1], x))
else:
return sorted(entries, key=lambda x: (-x[1][3], x))
def print_header(by=''):
if not args.get('diff'):
print('%-36s %7s' % (by, 'size'))
else:
print('%-36s %7s %7s %7s' % (by, 'old', 'new', 'diff'))
def print_entry(name, size):
print("%-36s %7d" % (name, size))
def print_diff_entry(name, old, new, diff, ratio):
print("%-36s %7s %7s %+7d%s" % (name,
old or "-",
new or "-",
diff,
' (%+.1f%%)' % (100*ratio) if ratio else ''))
def print_entries(by='name'):
entries = dedup_entries(results, by=by)
if not args.get('diff'):
print_header(by=by)
for name, size in sorted_entries(entries.items()):
print_entry(name, size)
else:
prev_entries = dedup_entries(prev_results, by=by)
diff = diff_entries(prev_entries, entries)
print_header(by='%s (%d added, %d removed)' % (by,
sum(1 for old, _, _, _ in diff.values() if not old),
sum(1 for _, new, _, _ in diff.values() if not new)))
for name, (old, new, diff, ratio) in sorted_diff_entries(
diff.items()):
if ratio or args.get('all'):
print_diff_entry(name, old, new, diff, ratio)
def print_totals():
if not args.get('diff'):
print_entry('TOTAL', total)
else:
ratio = (0.0 if not prev_total and not total
else 1.0 if not prev_total
else (total-prev_total)/prev_total)
print_diff_entry('TOTAL',
prev_total, total,
total-prev_total,
ratio)
if args.get('quiet'):
pass
elif args.get('summary'):
print_header()
print_totals()
elif args.get('files'):
print_entries(by='file')
print_totals()
else:
print_entries(by='name')
print_totals()
if __name__ == "__main__":
import argparse
import sys
parser = argparse.ArgumentParser(
description="Find struct sizes.")
parser.add_argument('obj_paths', nargs='*', default=OBJ_PATHS,
help="Description of where to find *.o files. May be a directory \
or a list of paths. Defaults to %r." % OBJ_PATHS)
parser.add_argument('-v', '--verbose', action='store_true',
help="Output commands that run behind the scenes.")
parser.add_argument('-q', '--quiet', action='store_true',
help="Don't show anything, useful with -o.")
parser.add_argument('-o', '--output',
help="Specify CSV file to store results.")
parser.add_argument('-u', '--use',
help="Don't compile and find struct sizes, instead use this CSV file.")
parser.add_argument('-d', '--diff',
help="Specify CSV file to diff struct size against.")
parser.add_argument('-m', '--merge',
help="Merge with an existing CSV file when writing to output.")
parser.add_argument('-a', '--all', action='store_true',
help="Show all functions, not just the ones that changed.")
parser.add_argument('-A', '--everything', action='store_true',
help="Include builtin and libc specific symbols.")
parser.add_argument('-s', '--size-sort', action='store_true',
help="Sort by size.")
parser.add_argument('-S', '--reverse-size-sort', action='store_true',
help="Sort by size, but backwards.")
parser.add_argument('-F', '--files', action='store_true',
help="Show file-level struct sizes.")
parser.add_argument('-Y', '--summary', action='store_true',
help="Only show the total struct size.")
parser.add_argument('--objdump-tool', default=['objdump'], type=lambda x: x.split(),
help="Path to the objdump tool to use.")
parser.add_argument('--build-dir',
help="Specify the relative build directory. Used to map object files \
to the correct source files.")
sys.exit(main(**vars(parser.parse_args())))

279
components/fs/littlefs/littlefs/scripts/summary.py Executable file
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#!/usr/bin/env python3
#
# Script to summarize the outputs of other scripts. Operates on CSV files.
#
import functools as ft
import collections as co
import os
import csv
import re
import math as m
# displayable fields
Field = co.namedtuple('Field', 'name,parse,acc,key,fmt,repr,null,ratio')
FIELDS = [
# name, parse, accumulate, fmt, print, null
Field('code',
lambda r: int(r['code_size']),
sum,
lambda r: r,
'%7s',
lambda r: r,
'-',
lambda old, new: (new-old)/old),
Field('data',
lambda r: int(r['data_size']),
sum,
lambda r: r,
'%7s',
lambda r: r,
'-',
lambda old, new: (new-old)/old),
Field('stack',
lambda r: float(r['stack_limit']),
max,
lambda r: r,
'%7s',
lambda r: '∞' if m.isinf(r) else int(r),
'-',
lambda old, new: (new-old)/old),
Field('structs',
lambda r: int(r['struct_size']),
sum,
lambda r: r,
'%8s',
lambda r: r,
'-',
lambda old, new: (new-old)/old),
Field('coverage',
lambda r: (int(r['coverage_hits']), int(r['coverage_count'])),
lambda rs: ft.reduce(lambda a, b: (a[0]+b[0], a[1]+b[1]), rs),
lambda r: r[0]/r[1],
'%19s',
lambda r: '%11s %7s' % ('%d/%d' % (r[0], r[1]), '%.1f%%' % (100*r[0]/r[1])),
'%11s %7s' % ('-', '-'),
lambda old, new: ((new[0]/new[1]) - (old[0]/old[1])))
]
def main(**args):
def openio(path, mode='r'):
if path == '-':
if 'r' in mode:
return os.fdopen(os.dup(sys.stdin.fileno()), 'r')
else:
return os.fdopen(os.dup(sys.stdout.fileno()), 'w')
else:
return open(path, mode)
# find results
results = co.defaultdict(lambda: {})
for path in args.get('csv_paths', '-'):
try:
with openio(path) as f:
r = csv.DictReader(f)
for result in r:
file = result.pop('file', '')
name = result.pop('name', '')
prev = results[(file, name)]
for field in FIELDS:
try:
r = field.parse(result)
if field.name in prev:
results[(file, name)][field.name] = field.acc(
[prev[field.name], r])
else:
results[(file, name)][field.name] = r
except (KeyError, ValueError):
pass
except FileNotFoundError:
pass
# find fields
if args.get('all_fields'):
fields = FIELDS
elif args.get('fields') is not None:
fields_dict = {field.name: field for field in FIELDS}
fields = [fields_dict[f] for f in args['fields']]
else:
fields = []
for field in FIELDS:
if any(field.name in result for result in results.values()):
fields.append(field)
# find total for every field
total = {}
for result in results.values():
for field in fields:
if field.name in result and field.name in total:
total[field.name] = field.acc(
[total[field.name], result[field.name]])
elif field.name in result:
total[field.name] = result[field.name]
# find previous results?
if args.get('diff'):
prev_results = co.defaultdict(lambda: {})
try:
with openio(args['diff']) as f:
r = csv.DictReader(f)
for result in r:
file = result.pop('file', '')
name = result.pop('name', '')
prev = prev_results[(file, name)]
for field in FIELDS:
try:
r = field.parse(result)
if field.name in prev:
prev_results[(file, name)][field.name] = field.acc(
[prev[field.name], r])
else:
prev_results[(file, name)][field.name] = r
except (KeyError, ValueError):
pass
except FileNotFoundError:
pass
prev_total = {}
for result in prev_results.values():
for field in fields:
if field.name in result and field.name in prev_total:
prev_total[field.name] = field.acc(
[prev_total[field.name], result[field.name]])
elif field.name in result:
prev_total[field.name] = result[field.name]
# print results
def dedup_entries(results, by='name'):
entries = co.defaultdict(lambda: {})
for (file, func), result in results.items():
entry = (file if by == 'file' else func)
prev = entries[entry]
for field in fields:
if field.name in result and field.name in prev:
entries[entry][field.name] = field.acc(
[prev[field.name], result[field.name]])
elif field.name in result:
entries[entry][field.name] = result[field.name]
return entries
def sorted_entries(entries):
if args.get('sort') is not None:
field = {field.name: field for field in FIELDS}[args['sort']]
return sorted(entries, key=lambda x: (
-(field.key(x[1][field.name])) if field.name in x[1] else -1, x))
elif args.get('reverse_sort') is not None:
field = {field.name: field for field in FIELDS}[args['reverse_sort']]
return sorted(entries, key=lambda x: (
+(field.key(x[1][field.name])) if field.name in x[1] else -1, x))
else:
return sorted(entries)
def print_header(by=''):
if not args.get('diff'):
print('%-36s' % by, end='')
for field in fields:
print((' '+field.fmt) % field.name, end='')
print()
else:
print('%-36s' % by, end='')
for field in fields:
print((' '+field.fmt) % field.name, end='')
print(' %-9s' % '', end='')
print()
def print_entry(name, result):
print('%-36s' % name, end='')
for field in fields:
r = result.get(field.name)
if r is not None:
print((' '+field.fmt) % field.repr(r), end='')
else:
print((' '+field.fmt) % '-', end='')
print()
def print_diff_entry(name, old, new):
print('%-36s' % name, end='')
for field in fields:
n = new.get(field.name)
if n is not None:
print((' '+field.fmt) % field.repr(n), end='')
else:
print((' '+field.fmt) % '-', end='')
o = old.get(field.name)
ratio = (
0.0 if m.isinf(o or 0) and m.isinf(n or 0)
else +float('inf') if m.isinf(n or 0)
else -float('inf') if m.isinf(o or 0)
else 0.0 if not o and not n
else +1.0 if not o
else -1.0 if not n
else field.ratio(o, n))
print(' %-9s' % (
'' if not ratio
else '(+∞%)' if ratio > 0 and m.isinf(ratio)
else '(-∞%)' if ratio < 0 and m.isinf(ratio)
else '(%+.1f%%)' % (100*ratio)), end='')
print()
def print_entries(by='name'):
entries = dedup_entries(results, by=by)
if not args.get('diff'):
print_header(by=by)
for name, result in sorted_entries(entries.items()):
print_entry(name, result)
else:
prev_entries = dedup_entries(prev_results, by=by)
print_header(by='%s (%d added, %d removed)' % (by,
sum(1 for name in entries if name not in prev_entries),
sum(1 for name in prev_entries if name not in entries)))
for name, result in sorted_entries(entries.items()):
if args.get('all') or result != prev_entries.get(name, {}):
print_diff_entry(name, prev_entries.get(name, {}), result)
def print_totals():
if not args.get('diff'):
print_entry('TOTAL', total)
else:
print_diff_entry('TOTAL', prev_total, total)
if args.get('summary'):
print_header()
print_totals()
elif args.get('files'):
print_entries(by='file')
print_totals()
else:
print_entries(by='name')
print_totals()
if __name__ == "__main__":
import argparse
import sys
parser = argparse.ArgumentParser(
description="Summarize measurements")
parser.add_argument('csv_paths', nargs='*', default='-',
help="Description of where to find *.csv files. May be a directory \
or list of paths. *.csv files will be merged to show the total \
coverage.")
parser.add_argument('-d', '--diff',
help="Specify CSV file to diff against.")
parser.add_argument('-a', '--all', action='store_true',
help="Show all objects, not just the ones that changed.")
parser.add_argument('-e', '--all-fields', action='store_true',
help="Show all fields, even those with no results.")
parser.add_argument('-f', '--fields', type=lambda x: re.split('\s*,\s*', x),
help="Comma separated list of fields to print, by default all fields \
that are found in the CSV files are printed.")
parser.add_argument('-s', '--sort',
help="Sort by this field.")
parser.add_argument('-S', '--reverse-sort',
help="Sort by this field, but backwards.")
parser.add_argument('-F', '--files', action='store_true',
help="Show file-level calls.")
parser.add_argument('-Y', '--summary', action='store_true',
help="Only show the totals.")
sys.exit(main(**vars(parser.parse_args())))

860
components/fs/littlefs/littlefs/scripts/test.py Executable file
View file

@ -0,0 +1,860 @@
#!/usr/bin/env python3
# This script manages littlefs tests, which are configured with
# .toml files stored in the tests directory.
#
import toml
import glob
import re
import os
import io
import itertools as it
import collections.abc as abc
import subprocess as sp
import base64
import sys
import copy
import shlex
import pty
import errno
import signal
TEST_PATHS = 'tests'
RULES = """
# add block devices to sources
TESTSRC ?= $(SRC) $(wildcard bd/*.c)
define FLATTEN
%(path)s%%$(subst /,.,$(target)): $(target)
./scripts/explode_asserts.py $$< -o $$@
endef
$(foreach target,$(TESTSRC),$(eval $(FLATTEN)))
-include %(path)s*.d
.SECONDARY:
%(path)s.test: %(path)s.test.o \\
$(foreach t,$(subst /,.,$(TESTSRC:.c=.o)),%(path)s.$t)
$(CC) $(CFLAGS) $^ $(LFLAGS) -o $@
# needed in case builddir is different
%(path)s%%.o: %(path)s%%.c
$(CC) -c -MMD $(CFLAGS) $< -o $@
"""
COVERAGE_RULES = """
%(path)s.test: override CFLAGS += -fprofile-arcs -ftest-coverage
# delete lingering coverage
%(path)s.test: | %(path)s.info.clean
.PHONY: %(path)s.info.clean
%(path)s.info.clean:
rm -f %(path)s*.gcda
# accumulate coverage info
.PHONY: %(path)s.info
%(path)s.info:
$(strip $(LCOV) -c \\
$(addprefix -d ,$(wildcard %(path)s*.gcda)) \\
--rc 'geninfo_adjust_src_path=$(shell pwd)' \\
-o $@)
$(LCOV) -e $@ $(addprefix /,$(SRC)) -o $@
ifdef COVERAGETARGET
$(strip $(LCOV) -a $@ \\
$(addprefix -a ,$(wildcard $(COVERAGETARGET))) \\
-o $(COVERAGETARGET))
endif
"""
GLOBALS = """
//////////////// AUTOGENERATED TEST ////////////////
#include "lfs.h"
#include "bd/lfs_testbd.h"
#include <stdio.h>
extern const char *lfs_testbd_path;
extern uint32_t lfs_testbd_cycles;
"""
DEFINES = {
'LFS_READ_SIZE': 16,
'LFS_PROG_SIZE': 'LFS_READ_SIZE',
'LFS_BLOCK_SIZE': 512,
'LFS_BLOCK_COUNT': 1024,
'LFS_BLOCK_CYCLES': -1,
'LFS_CACHE_SIZE': '(64 % LFS_PROG_SIZE == 0 ? 64 : LFS_PROG_SIZE)',
'LFS_LOOKAHEAD_SIZE': 16,
'LFS_ERASE_VALUE': 0xff,
'LFS_ERASE_CYCLES': 0,
'LFS_BADBLOCK_BEHAVIOR': 'LFS_TESTBD_BADBLOCK_PROGERROR',
}
PROLOGUE = """
// prologue
__attribute__((unused)) lfs_t lfs;
__attribute__((unused)) lfs_testbd_t bd;
__attribute__((unused)) lfs_file_t file;
__attribute__((unused)) lfs_dir_t dir;
__attribute__((unused)) struct lfs_info info;
__attribute__((unused)) char path[1024];
__attribute__((unused)) uint8_t buffer[(1024 > LFS_BLOCK_SIZE * 4) ? (1024) : (LFS_BLOCK_SIZE * 4)];
__attribute__((unused)) lfs_size_t size;
__attribute__((unused)) int err;
__attribute__((unused)) const struct lfs_config cfg = {
.context = &bd,
.read = lfs_testbd_read,
.prog = lfs_testbd_prog,
.erase = lfs_testbd_erase,
.sync = lfs_testbd_sync,
.read_size = LFS_READ_SIZE,
.prog_size = LFS_PROG_SIZE,
.block_size = LFS_BLOCK_SIZE,
.block_count = LFS_BLOCK_COUNT,
.block_cycles = LFS_BLOCK_CYCLES,
.cache_size = LFS_CACHE_SIZE,
.lookahead_size = LFS_LOOKAHEAD_SIZE,
};
__attribute__((unused)) const struct lfs_testbd_config bdcfg = {
.erase_value = LFS_ERASE_VALUE,
.erase_cycles = LFS_ERASE_CYCLES,
.badblock_behavior = LFS_BADBLOCK_BEHAVIOR,
.power_cycles = lfs_testbd_cycles,
};
lfs_testbd_createcfg(&cfg, lfs_testbd_path, &bdcfg) => 0;
"""
EPILOGUE = """
// epilogue
lfs_testbd_destroy(&cfg) => 0;
"""
PASS = '\033[32m✓\033[0m'
FAIL = '\033[31m✗\033[0m'
class TestFailure(Exception):
def __init__(self, case, returncode=None, stdout=None, assert_=None):
self.case = case
self.returncode = returncode
self.stdout = stdout
self.assert_ = assert_
class TestCase:
def __init__(self, config, filter=filter,
suite=None, caseno=None, lineno=None, **_):
self.config = config
self.filter = filter
self.suite = suite
self.caseno = caseno
self.lineno = lineno
self.code = config['code']
self.code_lineno = config['code_lineno']
self.defines = config.get('define', {})
self.if_ = config.get('if', None)
self.in_ = config.get('in', None)
self.result = None
def __str__(self):
if hasattr(self, 'permno'):
if any(k not in self.case.defines for k in self.defines):
return '%s#%d#%d (%s)' % (
self.suite.name, self.caseno, self.permno, ', '.join(
'%s=%s' % (k, v) for k, v in self.defines.items()
if k not in self.case.defines))
else:
return '%s#%d#%d' % (
self.suite.name, self.caseno, self.permno)
else:
return '%s#%d' % (
self.suite.name, self.caseno)
def permute(self, class_=None, defines={}, permno=None, **_):
ncase = (class_ or type(self))(self.config)
for k, v in self.__dict__.items():
setattr(ncase, k, v)
ncase.case = self
ncase.perms = [ncase]
ncase.permno = permno
ncase.defines = defines
return ncase
def build(self, f, **_):
# prologue
for k, v in sorted(self.defines.items()):
if k not in self.suite.defines:
f.write('#define %s %s\n' % (k, v))
f.write('void test_case%d(%s) {' % (self.caseno, ','.join(
'\n'+8*' '+'__attribute__((unused)) intmax_t %s' % k
for k in sorted(self.perms[0].defines)
if k not in self.defines)))
f.write(PROLOGUE)
f.write('\n')
f.write(4*' '+'// test case %d\n' % self.caseno)
f.write(4*' '+'#line %d "%s"\n' % (self.code_lineno, self.suite.path))
# test case goes here
f.write(self.code)
# epilogue
f.write(EPILOGUE)
f.write('}\n')
for k, v in sorted(self.defines.items()):
if k not in self.suite.defines:
f.write('#undef %s\n' % k)
def shouldtest(self, **args):
if (self.filter is not None and
len(self.filter) >= 1 and
self.filter[0] != self.caseno):
return False
elif (self.filter is not None and
len(self.filter) >= 2 and
self.filter[1] != self.permno):
return False
elif args.get('no_internal') and self.in_ is not None:
return False
elif self.if_ is not None:
if_ = self.if_
while True:
for k, v in sorted(self.defines.items(),
key=lambda x: len(x[0]), reverse=True):
if k in if_:
if_ = if_.replace(k, '(%s)' % v)
break
else:
break
if_ = (
re.sub('(\&\&|\?)', ' and ',
re.sub('(\|\||:)', ' or ',
re.sub('!(?!=)', ' not ', if_))))
return eval(if_)
else:
return True
def test(self, exec=[], persist=False, cycles=None,
gdb=False, failure=None, disk=None, **args):
# build command
cmd = exec + ['./%s.test' % self.suite.path,
repr(self.caseno), repr(self.permno)]
# persist disk or keep in RAM for speed?
if persist:
if not disk:
disk = self.suite.path + '.disk'
if persist != 'noerase':
try:
with open(disk, 'w') as f:
f.truncate(0)
if args.get('verbose'):
print('truncate --size=0', disk)
except FileNotFoundError:
pass
cmd.append(disk)
# simulate power-loss after n cycles?
if cycles:
cmd.append(str(cycles))
# failed? drop into debugger?
if gdb and failure:
ncmd = ['gdb']
if gdb == 'assert':
ncmd.extend(['-ex', 'r'])
if failure.assert_:
ncmd.extend(['-ex', 'up 2'])
elif gdb == 'main':
ncmd.extend([
'-ex', 'b %s:%d' % (self.suite.path, self.code_lineno),
'-ex', 'r'])
ncmd.extend(['--args'] + cmd)
if args.get('verbose'):
print(' '.join(shlex.quote(c) for c in ncmd))
signal.signal(signal.SIGINT, signal.SIG_IGN)
sys.exit(sp.call(ncmd))
# run test case!
mpty, spty = pty.openpty()
if args.get('verbose'):
print(' '.join(shlex.quote(c) for c in cmd))
proc = sp.Popen(cmd, stdout=spty, stderr=spty)
os.close(spty)
mpty = os.fdopen(mpty, 'r', 1)
stdout = []
assert_ = None
try:
while True:
try:
line = mpty.readline()
except OSError as e:
if e.errno == errno.EIO:
break
raise
if not line:
break;
stdout.append(line)
if args.get('verbose'):
sys.stdout.write(line)
# intercept asserts
m = re.match(
'^{0}([^:]+):(\d+):(?:\d+:)?{0}{1}:{0}(.*)$'
.format('(?:\033\[[\d;]*.| )*', 'assert'),
line)
if m and assert_ is None:
try:
with open(m.group(1)) as f:
lineno = int(m.group(2))
line = (next(it.islice(f, lineno-1, None))
.strip('\n'))
assert_ = {
'path': m.group(1),
'line': line,
'lineno': lineno,
'message': m.group(3)}
except:
pass
except KeyboardInterrupt:
raise TestFailure(self, 1, stdout, None)
proc.wait()
# did we pass?
if proc.returncode != 0:
raise TestFailure(self, proc.returncode, stdout, assert_)
else:
return PASS
class ValgrindTestCase(TestCase):
def __init__(self, config, **args):
self.leaky = config.get('leaky', False)
super().__init__(config, **args)
def shouldtest(self, **args):
return not self.leaky and super().shouldtest(**args)
def test(self, exec=[], **args):
verbose = args.get('verbose')
uninit = (self.defines.get('LFS_ERASE_VALUE', None) == -1)
exec = [
'valgrind',
'--leak-check=full',
] + (['--undef-value-errors=no'] if uninit else []) + [
] + (['--track-origins=yes'] if not uninit else []) + [
'--error-exitcode=4',
'--error-limit=no',
] + (['--num-callers=1'] if not verbose else []) + [
'-q'] + exec
return super().test(exec=exec, **args)
class ReentrantTestCase(TestCase):
def __init__(self, config, **args):
self.reentrant = config.get('reentrant', False)
super().__init__(config, **args)
def shouldtest(self, **args):
return self.reentrant and super().shouldtest(**args)
def test(self, persist=False, gdb=False, failure=None, **args):
for cycles in it.count(1):
# clear disk first?
if cycles == 1 and persist != 'noerase':
persist = 'erase'
else:
persist = 'noerase'
# exact cycle we should drop into debugger?
if gdb and failure and failure.cycleno == cycles:
return super().test(gdb=gdb, persist=persist, cycles=cycles,
failure=failure, **args)
# run tests, but kill the program after prog/erase has
# been hit n cycles. We exit with a special return code if the
# program has not finished, since this isn't a test failure.
try:
return super().test(persist=persist, cycles=cycles, **args)
except TestFailure as nfailure:
if nfailure.returncode == 33:
continue
else:
nfailure.cycleno = cycles
raise
class TestSuite:
def __init__(self, path, classes=[TestCase], defines={},
filter=None, **args):
self.name = os.path.basename(path)
if self.name.endswith('.toml'):
self.name = self.name[:-len('.toml')]
if args.get('build_dir'):
self.toml = path
self.path = args['build_dir'] + '/' + path
else:
self.toml = path
self.path = path
self.classes = classes
self.defines = defines.copy()
self.filter = filter
with open(self.toml) as f:
# load tests
config = toml.load(f)
# find line numbers
f.seek(0)
linenos = []
code_linenos = []
for i, line in enumerate(f):
if re.match(r'\[\[\s*case\s*\]\]', line):
linenos.append(i+1)
if re.match(r'code\s*=\s*(\'\'\'|""")', line):
code_linenos.append(i+2)
code_linenos.reverse()
# grab global config
for k, v in config.get('define', {}).items():
if k not in self.defines:
self.defines[k] = v
self.code = config.get('code', None)
if self.code is not None:
self.code_lineno = code_linenos.pop()
# create initial test cases
self.cases = []
for i, (case, lineno) in enumerate(zip(config['case'], linenos)):
# code lineno?
if 'code' in case:
case['code_lineno'] = code_linenos.pop()
# merge conditions if necessary
if 'if' in config and 'if' in case:
case['if'] = '(%s) && (%s)' % (config['if'], case['if'])
elif 'if' in config:
case['if'] = config['if']
# initialize test case
self.cases.append(TestCase(case, filter=filter,
suite=self, caseno=i+1, lineno=lineno, **args))
def __str__(self):
return self.name
def __lt__(self, other):
return self.name < other.name
def permute(self, **args):
for case in self.cases:
# lets find all parameterized definitions, in one of [args.D,
# suite.defines, case.defines, DEFINES]. Note that each of these
# can be either a dict of defines, or a list of dicts, expressing
# an initial set of permutations.
pending = [{}]
for inits in [self.defines, case.defines, DEFINES]:
if not isinstance(inits, list):
inits = [inits]
npending = []
for init, pinit in it.product(inits, pending):
ninit = pinit.copy()
for k, v in init.items():
if k not in ninit:
try:
ninit[k] = eval(v)
except:
ninit[k] = v
npending.append(ninit)
pending = npending
# expand permutations
pending = list(reversed(pending))
expanded = []
while pending:
perm = pending.pop()
for k, v in sorted(perm.items()):
if not isinstance(v, str) and isinstance(v, abc.Iterable):
for nv in reversed(v):
nperm = perm.copy()
nperm[k] = nv
pending.append(nperm)
break
else:
expanded.append(perm)
# generate permutations
case.perms = []
for i, (class_, defines) in enumerate(
it.product(self.classes, expanded)):
case.perms.append(case.permute(
class_, defines, permno=i+1, **args))
# also track non-unique defines
case.defines = {}
for k, v in case.perms[0].defines.items():
if all(perm.defines[k] == v for perm in case.perms):
case.defines[k] = v
# track all perms and non-unique defines
self.perms = []
for case in self.cases:
self.perms.extend(case.perms)
self.defines = {}
for k, v in self.perms[0].defines.items():
if all(perm.defines.get(k, None) == v for perm in self.perms):
self.defines[k] = v
return self.perms
def build(self, **args):
# build test files
tf = open(self.path + '.test.tc', 'w')
tf.write(GLOBALS)
if self.code is not None:
tf.write('#line %d "%s"\n' % (self.code_lineno, self.path))
tf.write(self.code)
tfs = {None: tf}
for case in self.cases:
if case.in_ not in tfs:
tfs[case.in_] = open(self.path+'.'+
re.sub('(\.c)?$', '.tc', case.in_.replace('/', '.')), 'w')
tfs[case.in_].write('#line 1 "%s"\n' % case.in_)
with open(case.in_) as f:
for line in f:
tfs[case.in_].write(line)
tfs[case.in_].write('\n')
tfs[case.in_].write(GLOBALS)
tfs[case.in_].write('\n')
case.build(tfs[case.in_], **args)
tf.write('\n')
tf.write('const char *lfs_testbd_path;\n')
tf.write('uint32_t lfs_testbd_cycles;\n')
tf.write('int main(int argc, char **argv) {\n')
tf.write(4*' '+'int case_ = (argc > 1) ? atoi(argv[1]) : 0;\n')
tf.write(4*' '+'int perm = (argc > 2) ? atoi(argv[2]) : 0;\n')
tf.write(4*' '+'lfs_testbd_path = (argc > 3) ? argv[3] : NULL;\n')
tf.write(4*' '+'lfs_testbd_cycles = (argc > 4) ? atoi(argv[4]) : 0;\n')
for perm in self.perms:
# test declaration
tf.write(4*' '+'extern void test_case%d(%s);\n' % (
perm.caseno, ', '.join(
'intmax_t %s' % k for k in sorted(perm.defines)
if k not in perm.case.defines)))
# test call
tf.write(4*' '+
'if (argc < 3 || (case_ == %d && perm == %d)) {'
' test_case%d(%s); '
'}\n' % (perm.caseno, perm.permno, perm.caseno, ', '.join(
str(v) for k, v in sorted(perm.defines.items())
if k not in perm.case.defines)))
tf.write('}\n')
for tf in tfs.values():
tf.close()
# write makefiles
with open(self.path + '.mk', 'w') as mk:
mk.write(RULES.replace(4*' ', '\t') % dict(path=self.path))
mk.write('\n')
# add coverage hooks?
if args.get('coverage'):
mk.write(COVERAGE_RULES.replace(4*' ', '\t') % dict(
path=self.path))
mk.write('\n')
# add truly global defines globally
for k, v in sorted(self.defines.items()):
mk.write('%s.test: override CFLAGS += -D%s=%r\n'
% (self.path, k, v))
for path in tfs:
if path is None:
mk.write('%s: %s | %s\n' % (
self.path+'.test.c',
self.toml,
self.path+'.test.tc'))
else:
mk.write('%s: %s %s | %s\n' % (
self.path+'.'+path.replace('/', '.'),
self.toml,
path,
self.path+'.'+re.sub('(\.c)?$', '.tc',
path.replace('/', '.'))))
mk.write('\t./scripts/explode_asserts.py $| -o $@\n')
self.makefile = self.path + '.mk'
self.target = self.path + '.test'
return self.makefile, self.target
def test(self, **args):
# run test suite!
if not args.get('verbose', True):
sys.stdout.write(self.name + ' ')
sys.stdout.flush()
for perm in self.perms:
if not perm.shouldtest(**args):
continue
try:
result = perm.test(**args)
except TestFailure as failure:
perm.result = failure
if not args.get('verbose', True):
sys.stdout.write(FAIL)
sys.stdout.flush()
if not args.get('keep_going'):
if not args.get('verbose', True):
sys.stdout.write('\n')
raise
else:
perm.result = PASS
if not args.get('verbose', True):
sys.stdout.write(PASS)
sys.stdout.flush()
if not args.get('verbose', True):
sys.stdout.write('\n')
def main(**args):
# figure out explicit defines
defines = {}
for define in args['D']:
k, v, *_ = define.split('=', 2) + ['']
defines[k] = v
# and what class of TestCase to run
classes = []
if args.get('normal'):
classes.append(TestCase)
if args.get('reentrant'):
classes.append(ReentrantTestCase)
if args.get('valgrind'):
classes.append(ValgrindTestCase)
if not classes:
classes = [TestCase]
suites = []
for testpath in args['test_paths']:
# optionally specified test case/perm
testpath, *filter = testpath.split('#')
filter = [int(f) for f in filter]
# figure out the suite's toml file
if os.path.isdir(testpath):
testpath = testpath + '/*.toml'
elif os.path.isfile(testpath):
testpath = testpath
elif testpath.endswith('.toml'):
testpath = TEST_PATHS + '/' + testpath
else:
testpath = TEST_PATHS + '/' + testpath + '.toml'
# find tests
for path in glob.glob(testpath):
suites.append(TestSuite(path, classes, defines, filter, **args))
# sort for reproducibility
suites = sorted(suites)
# generate permutations
for suite in suites:
suite.permute(**args)
# build tests in parallel
print('====== building ======')
makefiles = []
targets = []
for suite in suites:
makefile, target = suite.build(**args)
makefiles.append(makefile)
targets.append(target)
cmd = (['make', '-f', 'Makefile'] +
list(it.chain.from_iterable(['-f', m] for m in makefiles)) +
[target for target in targets])
mpty, spty = pty.openpty()
if args.get('verbose'):
print(' '.join(shlex.quote(c) for c in cmd))
proc = sp.Popen(cmd, stdout=spty, stderr=spty)
os.close(spty)
mpty = os.fdopen(mpty, 'r', 1)
stdout = []
while True:
try:
line = mpty.readline()
except OSError as e:
if e.errno == errno.EIO:
break
raise
if not line:
break;
stdout.append(line)
if args.get('verbose'):
sys.stdout.write(line)
# intercept warnings
m = re.match(
'^{0}([^:]+):(\d+):(?:\d+:)?{0}{1}:{0}(.*)$'
.format('(?:\033\[[\d;]*.| )*', 'warning'),
line)
if m and not args.get('verbose'):
try:
with open(m.group(1)) as f:
lineno = int(m.group(2))
line = next(it.islice(f, lineno-1, None)).strip('\n')
sys.stdout.write(
"\033[01m{path}:{lineno}:\033[01;35mwarning:\033[m "
"{message}\n{line}\n\n".format(
path=m.group(1), line=line, lineno=lineno,
message=m.group(3)))
except:
pass
proc.wait()
if proc.returncode != 0:
if not args.get('verbose'):
for line in stdout:
sys.stdout.write(line)
sys.exit(-1)
print('built %d test suites, %d test cases, %d permutations' % (
len(suites),
sum(len(suite.cases) for suite in suites),
sum(len(suite.perms) for suite in suites)))
total = 0
for suite in suites:
for perm in suite.perms:
total += perm.shouldtest(**args)
if total != sum(len(suite.perms) for suite in suites):
print('filtered down to %d permutations' % total)
# only requested to build?
if args.get('build'):
return 0
print('====== testing ======')
try:
for suite in suites:
suite.test(**args)
except TestFailure:
pass
print('====== results ======')
passed = 0
failed = 0
for suite in suites:
for perm in suite.perms:
if perm.result == PASS:
passed += 1
elif isinstance(perm.result, TestFailure):
sys.stdout.write(
"\033[01m{path}:{lineno}:\033[01;31mfailure:\033[m "
"{perm} failed\n".format(
perm=perm, path=perm.suite.path, lineno=perm.lineno,
returncode=perm.result.returncode or 0))
if perm.result.stdout:
if perm.result.assert_:
stdout = perm.result.stdout[:-1]
else:
stdout = perm.result.stdout
for line in stdout[-5:]:
sys.stdout.write(line)
if perm.result.assert_:
sys.stdout.write(
"\033[01m{path}:{lineno}:\033[01;31massert:\033[m "
"{message}\n{line}\n".format(
**perm.result.assert_))
sys.stdout.write('\n')
failed += 1
if args.get('coverage'):
# collect coverage info
# why -j1? lcov doesn't work in parallel because of gcov limitations
cmd = (['make', '-j1', '-f', 'Makefile'] +
list(it.chain.from_iterable(['-f', m] for m in makefiles)) +
(['COVERAGETARGET=%s' % args['coverage']]
if isinstance(args['coverage'], str) else []) +
[suite.path + '.info' for suite in suites
if any(perm.result == PASS for perm in suite.perms)])
if args.get('verbose'):
print(' '.join(shlex.quote(c) for c in cmd))
proc = sp.Popen(cmd,
stdout=sp.PIPE if not args.get('verbose') else None,
stderr=sp.STDOUT if not args.get('verbose') else None,
universal_newlines=True)
stdout = []
for line in proc.stdout:
stdout.append(line)
proc.wait()
if proc.returncode != 0:
if not args.get('verbose'):
for line in stdout:
sys.stdout.write(line)
sys.exit(-1)
if args.get('gdb'):
failure = None
for suite in suites:
for perm in suite.perms:
if isinstance(perm.result, TestFailure):
failure = perm.result
if failure is not None:
print('======= gdb ======')
# drop into gdb
failure.case.test(failure=failure, **args)
sys.exit(0)
print('tests passed %d/%d (%.1f%%)' % (passed, total,
100*(passed/total if total else 1.0)))
print('tests failed %d/%d (%.1f%%)' % (failed, total,
100*(failed/total if total else 1.0)))
return 1 if failed > 0 else 0
if __name__ == "__main__":
import argparse
parser = argparse.ArgumentParser(
description="Run parameterized tests in various configurations.")
parser.add_argument('test_paths', nargs='*', default=[TEST_PATHS],
help="Description of test(s) to run. By default, this is all tests \
found in the \"{0}\" directory. Here, you can specify a different \
directory of tests, a specific file, a suite by name, and even \
specific test cases and permutations. For example \
\"test_dirs#1\" or \"{0}/test_dirs.toml#1#1\".".format(TEST_PATHS))
parser.add_argument('-D', action='append', default=[],
help="Overriding parameter definitions.")
parser.add_argument('-v', '--verbose', action='store_true',
help="Output everything that is happening.")
parser.add_argument('-k', '--keep-going', action='store_true',
help="Run all tests instead of stopping on first error. Useful for CI.")
parser.add_argument('-p', '--persist', choices=['erase', 'noerase'],
nargs='?', const='erase',
help="Store disk image in a file.")
parser.add_argument('-b', '--build', action='store_true',
help="Only build the tests, do not execute.")
parser.add_argument('-g', '--gdb', choices=['init', 'main', 'assert'],
nargs='?', const='assert',
help="Drop into gdb on test failure.")
parser.add_argument('--no-internal', action='store_true',
help="Don't run tests that require internal knowledge.")
parser.add_argument('-n', '--normal', action='store_true',
help="Run tests normally.")
parser.add_argument('-r', '--reentrant', action='store_true',
help="Run reentrant tests with simulated power-loss.")
parser.add_argument('--valgrind', action='store_true',
help="Run non-leaky tests under valgrind to check for memory leaks.")
parser.add_argument('--exec', default=[], type=lambda e: e.split(),
help="Run tests with another executable prefixed on the command line.")
parser.add_argument('--disk',
help="Specify a file to use for persistent/reentrant tests.")
parser.add_argument('--coverage', type=lambda x: x if x else True,
nargs='?', const='',
help="Collect coverage information during testing. This uses lcov/gcov \
to accumulate coverage information into *.info files. May also \
a path to a *.info file to accumulate coverage info into.")
parser.add_argument('--build-dir',
help="Build relative to the specified directory instead of the \
current directory.")
sys.exit(main(**vars(parser.parse_args())))

653
components/fs/littlefs/littlefs/tests/test_alloc.toml Normal file
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@ -0,0 +1,653 @@
# allocator tests
# note for these to work there are a number constraints on the device geometry
if = 'LFS_BLOCK_CYCLES == -1'
[[case]] # parallel allocation test
define.FILES = 3
define.SIZE = '(((LFS_BLOCK_SIZE-8)*(LFS_BLOCK_COUNT-6)) / FILES)'
code = '''
const char *names[FILES] = {"bacon", "eggs", "pancakes"};
lfs_file_t files[FILES];
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "breakfast") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int n = 0; n < FILES; n++) {
sprintf(path, "breakfast/%s", names[n]);
lfs_file_open(&lfs, &files[n], path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
}
for (int n = 0; n < FILES; n++) {
size = strlen(names[n]);
for (lfs_size_t i = 0; i < SIZE; i += size) {
lfs_file_write(&lfs, &files[n], names[n], size) => size;
}
}
for (int n = 0; n < FILES; n++) {
lfs_file_close(&lfs, &files[n]) => 0;
}
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int n = 0; n < FILES; n++) {
sprintf(path, "breakfast/%s", names[n]);
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
size = strlen(names[n]);
for (lfs_size_t i = 0; i < SIZE; i += size) {
lfs_file_read(&lfs, &file, buffer, size) => size;
assert(memcmp(buffer, names[n], size) == 0);
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
'''
[[case]] # serial allocation test
define.FILES = 3
define.SIZE = '(((LFS_BLOCK_SIZE-8)*(LFS_BLOCK_COUNT-6)) / FILES)'
code = '''
const char *names[FILES] = {"bacon", "eggs", "pancakes"};
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "breakfast") => 0;
lfs_unmount(&lfs) => 0;
for (int n = 0; n < FILES; n++) {
lfs_mount(&lfs, &cfg) => 0;
sprintf(path, "breakfast/%s", names[n]);
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
size = strlen(names[n]);
memcpy(buffer, names[n], size);
for (int i = 0; i < SIZE; i += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
}
lfs_mount(&lfs, &cfg) => 0;
for (int n = 0; n < FILES; n++) {
sprintf(path, "breakfast/%s", names[n]);
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
size = strlen(names[n]);
for (int i = 0; i < SIZE; i += size) {
lfs_file_read(&lfs, &file, buffer, size) => size;
assert(memcmp(buffer, names[n], size) == 0);
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
'''
[[case]] # parallel allocation reuse test
define.FILES = 3
define.SIZE = '(((LFS_BLOCK_SIZE-8)*(LFS_BLOCK_COUNT-6)) / FILES)'
define.CYCLES = [1, 10]
code = '''
const char *names[FILES] = {"bacon", "eggs", "pancakes"};
lfs_file_t files[FILES];
lfs_format(&lfs, &cfg) => 0;
for (int c = 0; c < CYCLES; c++) {
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "breakfast") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int n = 0; n < FILES; n++) {
sprintf(path, "breakfast/%s", names[n]);
lfs_file_open(&lfs, &files[n], path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
}
for (int n = 0; n < FILES; n++) {
size = strlen(names[n]);
for (int i = 0; i < SIZE; i += size) {
lfs_file_write(&lfs, &files[n], names[n], size) => size;
}
}
for (int n = 0; n < FILES; n++) {
lfs_file_close(&lfs, &files[n]) => 0;
}
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int n = 0; n < FILES; n++) {
sprintf(path, "breakfast/%s", names[n]);
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
size = strlen(names[n]);
for (int i = 0; i < SIZE; i += size) {
lfs_file_read(&lfs, &file, buffer, size) => size;
assert(memcmp(buffer, names[n], size) == 0);
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int n = 0; n < FILES; n++) {
sprintf(path, "breakfast/%s", names[n]);
lfs_remove(&lfs, path) => 0;
}
lfs_remove(&lfs, "breakfast") => 0;
lfs_unmount(&lfs) => 0;
}
'''
[[case]] # serial allocation reuse test
define.FILES = 3
define.SIZE = '(((LFS_BLOCK_SIZE-8)*(LFS_BLOCK_COUNT-6)) / FILES)'
define.CYCLES = [1, 10]
code = '''
const char *names[FILES] = {"bacon", "eggs", "pancakes"};
lfs_format(&lfs, &cfg) => 0;
for (int c = 0; c < CYCLES; c++) {
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "breakfast") => 0;
lfs_unmount(&lfs) => 0;
for (int n = 0; n < FILES; n++) {
lfs_mount(&lfs, &cfg) => 0;
sprintf(path, "breakfast/%s", names[n]);
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
size = strlen(names[n]);
memcpy(buffer, names[n], size);
for (int i = 0; i < SIZE; i += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
}
lfs_mount(&lfs, &cfg) => 0;
for (int n = 0; n < FILES; n++) {
sprintf(path, "breakfast/%s", names[n]);
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
size = strlen(names[n]);
for (int i = 0; i < SIZE; i += size) {
lfs_file_read(&lfs, &file, buffer, size) => size;
assert(memcmp(buffer, names[n], size) == 0);
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int n = 0; n < FILES; n++) {
sprintf(path, "breakfast/%s", names[n]);
lfs_remove(&lfs, path) => 0;
}
lfs_remove(&lfs, "breakfast") => 0;
lfs_unmount(&lfs) => 0;
}
'''
[[case]] # exhaustion test
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
size = strlen("exhaustion");
memcpy(buffer, "exhaustion", size);
lfs_file_write(&lfs, &file, buffer, size) => size;
lfs_file_sync(&lfs, &file) => 0;
size = strlen("blahblahblahblah");
memcpy(buffer, "blahblahblahblah", size);
lfs_ssize_t res;
while (true) {
res = lfs_file_write(&lfs, &file, buffer, size);
if (res < 0) {
break;
}
res => size;
}
res => LFS_ERR_NOSPC;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "exhaustion", LFS_O_RDONLY);
size = strlen("exhaustion");
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "exhaustion", size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # exhaustion wraparound test
define.SIZE = '(((LFS_BLOCK_SIZE-8)*(LFS_BLOCK_COUNT-4)) / 3)'
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "padding", LFS_O_WRONLY | LFS_O_CREAT);
size = strlen("buffering");
memcpy(buffer, "buffering", size);
for (int i = 0; i < SIZE; i += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
lfs_remove(&lfs, "padding") => 0;
lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
size = strlen("exhaustion");
memcpy(buffer, "exhaustion", size);
lfs_file_write(&lfs, &file, buffer, size) => size;
lfs_file_sync(&lfs, &file) => 0;
size = strlen("blahblahblahblah");
memcpy(buffer, "blahblahblahblah", size);
lfs_ssize_t res;
while (true) {
res = lfs_file_write(&lfs, &file, buffer, size);
if (res < 0) {
break;
}
res => size;
}
res => LFS_ERR_NOSPC;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "exhaustion", LFS_O_RDONLY);
size = strlen("exhaustion");
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "exhaustion", size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_remove(&lfs, "exhaustion") => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # dir exhaustion test
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
// find out max file size
lfs_mkdir(&lfs, "exhaustiondir") => 0;
size = strlen("blahblahblahblah");
memcpy(buffer, "blahblahblahblah", size);
lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
int count = 0;
while (true) {
err = lfs_file_write(&lfs, &file, buffer, size);
if (err < 0) {
break;
}
count += 1;
}
err => LFS_ERR_NOSPC;
lfs_file_close(&lfs, &file) => 0;
lfs_remove(&lfs, "exhaustion") => 0;
lfs_remove(&lfs, "exhaustiondir") => 0;
// see if dir fits with max file size
lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
for (int i = 0; i < count; i++) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
lfs_mkdir(&lfs, "exhaustiondir") => 0;
lfs_remove(&lfs, "exhaustiondir") => 0;
lfs_remove(&lfs, "exhaustion") => 0;
// see if dir fits with > max file size
lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
for (int i = 0; i < count+1; i++) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
lfs_mkdir(&lfs, "exhaustiondir") => LFS_ERR_NOSPC;
lfs_remove(&lfs, "exhaustion") => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # what if we have a bad block during an allocation scan?
in = "lfs.c"
define.LFS_ERASE_CYCLES = 0xffffffff
define.LFS_BADBLOCK_BEHAVIOR = 'LFS_TESTBD_BADBLOCK_READERROR'
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
// first fill to exhaustion to find available space
lfs_file_open(&lfs, &file, "pacman", LFS_O_WRONLY | LFS_O_CREAT) => 0;
strcpy((char*)buffer, "waka");
size = strlen("waka");
lfs_size_t filesize = 0;
while (true) {
lfs_ssize_t res = lfs_file_write(&lfs, &file, buffer, size);
assert(res == (lfs_ssize_t)size || res == LFS_ERR_NOSPC);
if (res == LFS_ERR_NOSPC) {
break;
}
filesize += size;
}
lfs_file_close(&lfs, &file) => 0;
// now fill all but a couple of blocks of the filesystem with data
filesize -= 3*LFS_BLOCK_SIZE;
lfs_file_open(&lfs, &file, "pacman", LFS_O_WRONLY | LFS_O_CREAT) => 0;
strcpy((char*)buffer, "waka");
size = strlen("waka");
for (lfs_size_t i = 0; i < filesize/size; i++) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
// also save head of file so we can error during lookahead scan
lfs_block_t fileblock = file.ctz.head;
lfs_unmount(&lfs) => 0;
// remount to force an alloc scan
lfs_mount(&lfs, &cfg) => 0;
// but mark the head of our file as a "bad block", this is force our
// scan to bail early
lfs_testbd_setwear(&cfg, fileblock, 0xffffffff) => 0;
lfs_file_open(&lfs, &file, "ghost", LFS_O_WRONLY | LFS_O_CREAT) => 0;
strcpy((char*)buffer, "chomp");
size = strlen("chomp");
while (true) {
lfs_ssize_t res = lfs_file_write(&lfs, &file, buffer, size);
assert(res == (lfs_ssize_t)size || res == LFS_ERR_CORRUPT);
if (res == LFS_ERR_CORRUPT) {
break;
}
}
lfs_file_close(&lfs, &file) => 0;
// now reverse the "bad block" and try to write the file again until we
// run out of space
lfs_testbd_setwear(&cfg, fileblock, 0) => 0;
lfs_file_open(&lfs, &file, "ghost", LFS_O_WRONLY | LFS_O_CREAT) => 0;
strcpy((char*)buffer, "chomp");
size = strlen("chomp");
while (true) {
lfs_ssize_t res = lfs_file_write(&lfs, &file, buffer, size);
assert(res == (lfs_ssize_t)size || res == LFS_ERR_NOSPC);
if (res == LFS_ERR_NOSPC) {
break;
}
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
// check that the disk isn't hurt
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "pacman", LFS_O_RDONLY) => 0;
strcpy((char*)buffer, "waka");
size = strlen("waka");
for (lfs_size_t i = 0; i < filesize/size; i++) {
uint8_t rbuffer[4];
lfs_file_read(&lfs, &file, rbuffer, size) => size;
assert(memcmp(rbuffer, buffer, size) == 0);
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
# Below, I don't like these tests. They're fragile and depend _heavily_
# on the geometry of the block device. But they are valuable. Eventually they
# should be removed and replaced with generalized tests.
[[case]] # chained dir exhaustion test
define.LFS_BLOCK_SIZE = 512
define.LFS_BLOCK_COUNT = 1024
if = 'LFS_BLOCK_SIZE == 512 && LFS_BLOCK_COUNT == 1024'
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
// find out max file size
lfs_mkdir(&lfs, "exhaustiondir") => 0;
for (int i = 0; i < 10; i++) {
sprintf(path, "dirwithanexhaustivelylongnameforpadding%d", i);
lfs_mkdir(&lfs, path) => 0;
}
size = strlen("blahblahblahblah");
memcpy(buffer, "blahblahblahblah", size);
lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
int count = 0;
while (true) {
err = lfs_file_write(&lfs, &file, buffer, size);
if (err < 0) {
break;
}
count += 1;
}
err => LFS_ERR_NOSPC;
lfs_file_close(&lfs, &file) => 0;
lfs_remove(&lfs, "exhaustion") => 0;
lfs_remove(&lfs, "exhaustiondir") => 0;
for (int i = 0; i < 10; i++) {
sprintf(path, "dirwithanexhaustivelylongnameforpadding%d", i);
lfs_remove(&lfs, path) => 0;
}
// see that chained dir fails
lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
for (int i = 0; i < count+1; i++) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_sync(&lfs, &file) => 0;
for (int i = 0; i < 10; i++) {
sprintf(path, "dirwithanexhaustivelylongnameforpadding%d", i);
lfs_mkdir(&lfs, path) => 0;
}
lfs_mkdir(&lfs, "exhaustiondir") => LFS_ERR_NOSPC;
// shorten file to try a second chained dir
while (true) {
err = lfs_mkdir(&lfs, "exhaustiondir");
if (err != LFS_ERR_NOSPC) {
break;
}
lfs_ssize_t filesize = lfs_file_size(&lfs, &file);
filesize > 0 => true;
lfs_file_truncate(&lfs, &file, filesize - size) => 0;
lfs_file_sync(&lfs, &file) => 0;
}
err => 0;
lfs_mkdir(&lfs, "exhaustiondir2") => LFS_ERR_NOSPC;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # split dir test
define.LFS_BLOCK_SIZE = 512
define.LFS_BLOCK_COUNT = 1024
if = 'LFS_BLOCK_SIZE == 512 && LFS_BLOCK_COUNT == 1024'
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
// create one block hole for half a directory
lfs_file_open(&lfs, &file, "bump", LFS_O_WRONLY | LFS_O_CREAT) => 0;
for (lfs_size_t i = 0; i < cfg.block_size; i += 2) {
memcpy(&buffer[i], "hi", 2);
}
lfs_file_write(&lfs, &file, buffer, cfg.block_size) => cfg.block_size;
lfs_file_close(&lfs, &file) => 0;
lfs_file_open(&lfs, &file, "exhaustion", LFS_O_WRONLY | LFS_O_CREAT);
size = strlen("blahblahblahblah");
memcpy(buffer, "blahblahblahblah", size);
for (lfs_size_t i = 0;
i < (cfg.block_count-4)*(cfg.block_size-8);
i += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
// remount to force reset of lookahead
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
// open hole
lfs_remove(&lfs, "bump") => 0;
lfs_mkdir(&lfs, "splitdir") => 0;
lfs_file_open(&lfs, &file, "splitdir/bump",
LFS_O_WRONLY | LFS_O_CREAT) => 0;
for (lfs_size_t i = 0; i < cfg.block_size; i += 2) {
memcpy(&buffer[i], "hi", 2);
}
lfs_file_write(&lfs, &file, buffer, 2*cfg.block_size) => LFS_ERR_NOSPC;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # outdated lookahead test
define.LFS_BLOCK_SIZE = 512
define.LFS_BLOCK_COUNT = 1024
if = 'LFS_BLOCK_SIZE == 512 && LFS_BLOCK_COUNT == 1024'
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
// fill completely with two files
lfs_file_open(&lfs, &file, "exhaustion1",
LFS_O_WRONLY | LFS_O_CREAT) => 0;
size = strlen("blahblahblahblah");
memcpy(buffer, "blahblahblahblah", size);
for (lfs_size_t i = 0;
i < ((cfg.block_count-2)/2)*(cfg.block_size-8);
i += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
lfs_file_open(&lfs, &file, "exhaustion2",
LFS_O_WRONLY | LFS_O_CREAT) => 0;
size = strlen("blahblahblahblah");
memcpy(buffer, "blahblahblahblah", size);
for (lfs_size_t i = 0;
i < ((cfg.block_count-2+1)/2)*(cfg.block_size-8);
i += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
// remount to force reset of lookahead
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
// rewrite one file
lfs_file_open(&lfs, &file, "exhaustion1",
LFS_O_WRONLY | LFS_O_TRUNC) => 0;
lfs_file_sync(&lfs, &file) => 0;
size = strlen("blahblahblahblah");
memcpy(buffer, "blahblahblahblah", size);
for (lfs_size_t i = 0;
i < ((cfg.block_count-2)/2)*(cfg.block_size-8);
i += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
// rewrite second file, this requires lookahead does not
// use old population
lfs_file_open(&lfs, &file, "exhaustion2",
LFS_O_WRONLY | LFS_O_TRUNC) => 0;
lfs_file_sync(&lfs, &file) => 0;
size = strlen("blahblahblahblah");
memcpy(buffer, "blahblahblahblah", size);
for (lfs_size_t i = 0;
i < ((cfg.block_count-2+1)/2)*(cfg.block_size-8);
i += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # outdated lookahead and split dir test
define.LFS_BLOCK_SIZE = 512
define.LFS_BLOCK_COUNT = 1024
if = 'LFS_BLOCK_SIZE == 512 && LFS_BLOCK_COUNT == 1024'
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
// fill completely with two files
lfs_file_open(&lfs, &file, "exhaustion1",
LFS_O_WRONLY | LFS_O_CREAT) => 0;
size = strlen("blahblahblahblah");
memcpy(buffer, "blahblahblahblah", size);
for (lfs_size_t i = 0;
i < ((cfg.block_count-2)/2)*(cfg.block_size-8);
i += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
lfs_file_open(&lfs, &file, "exhaustion2",
LFS_O_WRONLY | LFS_O_CREAT) => 0;
size = strlen("blahblahblahblah");
memcpy(buffer, "blahblahblahblah", size);
for (lfs_size_t i = 0;
i < ((cfg.block_count-2+1)/2)*(cfg.block_size-8);
i += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
// remount to force reset of lookahead
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
// rewrite one file with a hole of one block
lfs_file_open(&lfs, &file, "exhaustion1",
LFS_O_WRONLY | LFS_O_TRUNC) => 0;
lfs_file_sync(&lfs, &file) => 0;
size = strlen("blahblahblahblah");
memcpy(buffer, "blahblahblahblah", size);
for (lfs_size_t i = 0;
i < ((cfg.block_count-2)/2 - 1)*(cfg.block_size-8);
i += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
// try to allocate a directory, should fail!
lfs_mkdir(&lfs, "split") => LFS_ERR_NOSPC;
// file should not fail
lfs_file_open(&lfs, &file, "notasplit",
LFS_O_WRONLY | LFS_O_CREAT) => 0;
lfs_file_write(&lfs, &file, "hi", 2) => 2;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''

304
components/fs/littlefs/littlefs/tests/test_attrs.toml Normal file
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@ -0,0 +1,304 @@
[[case]] # set/get attribute
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "hello") => 0;
lfs_file_open(&lfs, &file, "hello/hello", LFS_O_WRONLY | LFS_O_CREAT) => 0;
lfs_file_write(&lfs, &file, "hello", strlen("hello")) => strlen("hello");
lfs_file_close(&lfs, &file);
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
memset(buffer, 0, sizeof(buffer));
lfs_setattr(&lfs, "hello", 'A', "aaaa", 4) => 0;
lfs_setattr(&lfs, "hello", 'B', "bbbbbb", 6) => 0;
lfs_setattr(&lfs, "hello", 'C', "ccccc", 5) => 0;
lfs_getattr(&lfs, "hello", 'A', buffer, 4) => 4;
lfs_getattr(&lfs, "hello", 'B', buffer+4, 6) => 6;
lfs_getattr(&lfs, "hello", 'C', buffer+10, 5) => 5;
memcmp(buffer, "aaaa", 4) => 0;
memcmp(buffer+4, "bbbbbb", 6) => 0;
memcmp(buffer+10, "ccccc", 5) => 0;
lfs_setattr(&lfs, "hello", 'B', "", 0) => 0;
lfs_getattr(&lfs, "hello", 'A', buffer, 4) => 4;
lfs_getattr(&lfs, "hello", 'B', buffer+4, 6) => 0;
lfs_getattr(&lfs, "hello", 'C', buffer+10, 5) => 5;
memcmp(buffer, "aaaa", 4) => 0;
memcmp(buffer+4, "\0\0\0\0\0\0", 6) => 0;
memcmp(buffer+10, "ccccc", 5) => 0;
lfs_removeattr(&lfs, "hello", 'B') => 0;
lfs_getattr(&lfs, "hello", 'A', buffer, 4) => 4;
lfs_getattr(&lfs, "hello", 'B', buffer+4, 6) => LFS_ERR_NOATTR;
lfs_getattr(&lfs, "hello", 'C', buffer+10, 5) => 5;
memcmp(buffer, "aaaa", 4) => 0;
memcmp(buffer+4, "\0\0\0\0\0\0", 6) => 0;
memcmp(buffer+10, "ccccc", 5) => 0;
lfs_setattr(&lfs, "hello", 'B', "dddddd", 6) => 0;
lfs_getattr(&lfs, "hello", 'A', buffer, 4) => 4;
lfs_getattr(&lfs, "hello", 'B', buffer+4, 6) => 6;
lfs_getattr(&lfs, "hello", 'C', buffer+10, 5) => 5;
memcmp(buffer, "aaaa", 4) => 0;
memcmp(buffer+4, "dddddd", 6) => 0;
memcmp(buffer+10, "ccccc", 5) => 0;
lfs_setattr(&lfs, "hello", 'B', "eee", 3) => 0;
lfs_getattr(&lfs, "hello", 'A', buffer, 4) => 4;
lfs_getattr(&lfs, "hello", 'B', buffer+4, 6) => 3;
lfs_getattr(&lfs, "hello", 'C', buffer+10, 5) => 5;
memcmp(buffer, "aaaa", 4) => 0;
memcmp(buffer+4, "eee\0\0\0", 6) => 0;
memcmp(buffer+10, "ccccc", 5) => 0;
lfs_setattr(&lfs, "hello", 'A', buffer, LFS_ATTR_MAX+1) => LFS_ERR_NOSPC;
lfs_setattr(&lfs, "hello", 'B', "fffffffff", 9) => 0;
lfs_getattr(&lfs, "hello", 'A', buffer, 4) => 4;
lfs_getattr(&lfs, "hello", 'B', buffer+4, 6) => 9;
lfs_getattr(&lfs, "hello", 'C', buffer+10, 5) => 5;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
memset(buffer, 0, sizeof(buffer));
lfs_getattr(&lfs, "hello", 'A', buffer, 4) => 4;
lfs_getattr(&lfs, "hello", 'B', buffer+4, 9) => 9;
lfs_getattr(&lfs, "hello", 'C', buffer+13, 5) => 5;
memcmp(buffer, "aaaa", 4) => 0;
memcmp(buffer+4, "fffffffff", 9) => 0;
memcmp(buffer+13, "ccccc", 5) => 0;
lfs_file_open(&lfs, &file, "hello/hello", LFS_O_RDONLY) => 0;
lfs_file_read(&lfs, &file, buffer, sizeof(buffer)) => strlen("hello");
memcmp(buffer, "hello", strlen("hello")) => 0;
lfs_file_close(&lfs, &file);
lfs_unmount(&lfs) => 0;
'''
[[case]] # set/get root attribute
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "hello") => 0;
lfs_file_open(&lfs, &file, "hello/hello", LFS_O_WRONLY | LFS_O_CREAT) => 0;
lfs_file_write(&lfs, &file, "hello", strlen("hello")) => strlen("hello");
lfs_file_close(&lfs, &file);
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
memset(buffer, 0, sizeof(buffer));
lfs_setattr(&lfs, "/", 'A', "aaaa", 4) => 0;
lfs_setattr(&lfs, "/", 'B', "bbbbbb", 6) => 0;
lfs_setattr(&lfs, "/", 'C', "ccccc", 5) => 0;
lfs_getattr(&lfs, "/", 'A', buffer, 4) => 4;
lfs_getattr(&lfs, "/", 'B', buffer+4, 6) => 6;
lfs_getattr(&lfs, "/", 'C', buffer+10, 5) => 5;
memcmp(buffer, "aaaa", 4) => 0;
memcmp(buffer+4, "bbbbbb", 6) => 0;
memcmp(buffer+10, "ccccc", 5) => 0;
lfs_setattr(&lfs, "/", 'B', "", 0) => 0;
lfs_getattr(&lfs, "/", 'A', buffer, 4) => 4;
lfs_getattr(&lfs, "/", 'B', buffer+4, 6) => 0;
lfs_getattr(&lfs, "/", 'C', buffer+10, 5) => 5;
memcmp(buffer, "aaaa", 4) => 0;
memcmp(buffer+4, "\0\0\0\0\0\0", 6) => 0;
memcmp(buffer+10, "ccccc", 5) => 0;
lfs_removeattr(&lfs, "/", 'B') => 0;
lfs_getattr(&lfs, "/", 'A', buffer, 4) => 4;
lfs_getattr(&lfs, "/", 'B', buffer+4, 6) => LFS_ERR_NOATTR;
lfs_getattr(&lfs, "/", 'C', buffer+10, 5) => 5;
memcmp(buffer, "aaaa", 4) => 0;
memcmp(buffer+4, "\0\0\0\0\0\0", 6) => 0;
memcmp(buffer+10, "ccccc", 5) => 0;
lfs_setattr(&lfs, "/", 'B', "dddddd", 6) => 0;
lfs_getattr(&lfs, "/", 'A', buffer, 4) => 4;
lfs_getattr(&lfs, "/", 'B', buffer+4, 6) => 6;
lfs_getattr(&lfs, "/", 'C', buffer+10, 5) => 5;
memcmp(buffer, "aaaa", 4) => 0;
memcmp(buffer+4, "dddddd", 6) => 0;
memcmp(buffer+10, "ccccc", 5) => 0;
lfs_setattr(&lfs, "/", 'B', "eee", 3) => 0;
lfs_getattr(&lfs, "/", 'A', buffer, 4) => 4;
lfs_getattr(&lfs, "/", 'B', buffer+4, 6) => 3;
lfs_getattr(&lfs, "/", 'C', buffer+10, 5) => 5;
memcmp(buffer, "aaaa", 4) => 0;
memcmp(buffer+4, "eee\0\0\0", 6) => 0;
memcmp(buffer+10, "ccccc", 5) => 0;
lfs_setattr(&lfs, "/", 'A', buffer, LFS_ATTR_MAX+1) => LFS_ERR_NOSPC;
lfs_setattr(&lfs, "/", 'B', "fffffffff", 9) => 0;
lfs_getattr(&lfs, "/", 'A', buffer, 4) => 4;
lfs_getattr(&lfs, "/", 'B', buffer+4, 6) => 9;
lfs_getattr(&lfs, "/", 'C', buffer+10, 5) => 5;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
memset(buffer, 0, sizeof(buffer));
lfs_getattr(&lfs, "/", 'A', buffer, 4) => 4;
lfs_getattr(&lfs, "/", 'B', buffer+4, 9) => 9;
lfs_getattr(&lfs, "/", 'C', buffer+13, 5) => 5;
memcmp(buffer, "aaaa", 4) => 0;
memcmp(buffer+4, "fffffffff", 9) => 0;
memcmp(buffer+13, "ccccc", 5) => 0;
lfs_file_open(&lfs, &file, "hello/hello", LFS_O_RDONLY) => 0;
lfs_file_read(&lfs, &file, buffer, sizeof(buffer)) => strlen("hello");
memcmp(buffer, "hello", strlen("hello")) => 0;
lfs_file_close(&lfs, &file);
lfs_unmount(&lfs) => 0;
'''
[[case]] # set/get file attribute
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "hello") => 0;
lfs_file_open(&lfs, &file, "hello/hello", LFS_O_WRONLY | LFS_O_CREAT) => 0;
lfs_file_write(&lfs, &file, "hello", strlen("hello")) => strlen("hello");
lfs_file_close(&lfs, &file);
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
memset(buffer, 0, sizeof(buffer));
struct lfs_attr attrs1[] = {
{'A', buffer, 4},
{'B', buffer+4, 6},
{'C', buffer+10, 5},
};
struct lfs_file_config cfg1 = {.attrs=attrs1, .attr_count=3};
lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_WRONLY, &cfg1) => 0;
memcpy(buffer, "aaaa", 4);
memcpy(buffer+4, "bbbbbb", 6);
memcpy(buffer+10, "ccccc", 5);
lfs_file_close(&lfs, &file) => 0;
memset(buffer, 0, 15);
lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_RDONLY, &cfg1) => 0;
lfs_file_close(&lfs, &file) => 0;
memcmp(buffer, "aaaa", 4) => 0;
memcmp(buffer+4, "bbbbbb", 6) => 0;
memcmp(buffer+10, "ccccc", 5) => 0;
attrs1[1].size = 0;
lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_WRONLY, &cfg1) => 0;
lfs_file_close(&lfs, &file) => 0;
memset(buffer, 0, 15);
attrs1[1].size = 6;
lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_RDONLY, &cfg1) => 0;
lfs_file_close(&lfs, &file) => 0;
memcmp(buffer, "aaaa", 4) => 0;
memcmp(buffer+4, "\0\0\0\0\0\0", 6) => 0;
memcmp(buffer+10, "ccccc", 5) => 0;
attrs1[1].size = 6;
lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_WRONLY, &cfg1) => 0;
memcpy(buffer+4, "dddddd", 6);
lfs_file_close(&lfs, &file) => 0;
memset(buffer, 0, 15);
attrs1[1].size = 6;
lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_RDONLY, &cfg1) => 0;
lfs_file_close(&lfs, &file) => 0;
memcmp(buffer, "aaaa", 4) => 0;
memcmp(buffer+4, "dddddd", 6) => 0;
memcmp(buffer+10, "ccccc", 5) => 0;
attrs1[1].size = 3;
lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_WRONLY, &cfg1) => 0;
memcpy(buffer+4, "eee", 3);
lfs_file_close(&lfs, &file) => 0;
memset(buffer, 0, 15);
attrs1[1].size = 6;
lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_RDONLY, &cfg1) => 0;
lfs_file_close(&lfs, &file) => 0;
memcmp(buffer, "aaaa", 4) => 0;
memcmp(buffer+4, "eee\0\0\0", 6) => 0;
memcmp(buffer+10, "ccccc", 5) => 0;
attrs1[0].size = LFS_ATTR_MAX+1;
lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_WRONLY, &cfg1)
=> LFS_ERR_NOSPC;
struct lfs_attr attrs2[] = {
{'A', buffer, 4},
{'B', buffer+4, 9},
{'C', buffer+13, 5},
};
struct lfs_file_config cfg2 = {.attrs=attrs2, .attr_count=3};
lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_RDWR, &cfg2) => 0;
memcpy(buffer+4, "fffffffff", 9);
lfs_file_close(&lfs, &file) => 0;
attrs1[0].size = 4;
lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_RDONLY, &cfg1) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
memset(buffer, 0, sizeof(buffer));
struct lfs_attr attrs3[] = {
{'A', buffer, 4},
{'B', buffer+4, 9},
{'C', buffer+13, 5},
};
struct lfs_file_config cfg3 = {.attrs=attrs3, .attr_count=3};
lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_RDONLY, &cfg3) => 0;
lfs_file_close(&lfs, &file) => 0;
memcmp(buffer, "aaaa", 4) => 0;
memcmp(buffer+4, "fffffffff", 9) => 0;
memcmp(buffer+13, "ccccc", 5) => 0;
lfs_file_open(&lfs, &file, "hello/hello", LFS_O_RDONLY) => 0;
lfs_file_read(&lfs, &file, buffer, sizeof(buffer)) => strlen("hello");
memcmp(buffer, "hello", strlen("hello")) => 0;
lfs_file_close(&lfs, &file);
lfs_unmount(&lfs) => 0;
'''
[[case]] # deferred file attributes
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "hello") => 0;
lfs_file_open(&lfs, &file, "hello/hello", LFS_O_WRONLY | LFS_O_CREAT) => 0;
lfs_file_write(&lfs, &file, "hello", strlen("hello")) => strlen("hello");
lfs_file_close(&lfs, &file);
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_setattr(&lfs, "hello/hello", 'B', "fffffffff", 9) => 0;
lfs_setattr(&lfs, "hello/hello", 'C', "ccccc", 5) => 0;
memset(buffer, 0, sizeof(buffer));
struct lfs_attr attrs1[] = {
{'B', "gggg", 4},
{'C', "", 0},
{'D', "hhhh", 4},
};
struct lfs_file_config cfg1 = {.attrs=attrs1, .attr_count=3};
lfs_file_opencfg(&lfs, &file, "hello/hello", LFS_O_WRONLY, &cfg1) => 0;
lfs_getattr(&lfs, "hello/hello", 'B', buffer, 9) => 9;
lfs_getattr(&lfs, "hello/hello", 'C', buffer+9, 9) => 5;
lfs_getattr(&lfs, "hello/hello", 'D', buffer+18, 9) => LFS_ERR_NOATTR;
memcmp(buffer, "fffffffff", 9) => 0;
memcmp(buffer+9, "ccccc\0\0\0\0", 9) => 0;
memcmp(buffer+18, "\0\0\0\0\0\0\0\0\0", 9) => 0;
lfs_file_sync(&lfs, &file) => 0;
lfs_getattr(&lfs, "hello/hello", 'B', buffer, 9) => 4;
lfs_getattr(&lfs, "hello/hello", 'C', buffer+9, 9) => 0;
lfs_getattr(&lfs, "hello/hello", 'D', buffer+18, 9) => 4;
memcmp(buffer, "gggg\0\0\0\0\0", 9) => 0;
memcmp(buffer+9, "\0\0\0\0\0\0\0\0\0", 9) => 0;
memcmp(buffer+18, "hhhh\0\0\0\0\0", 9) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''

241
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# bad blocks with block cycles should be tested in test_relocations
if = 'LFS_BLOCK_CYCLES == -1'
[[case]] # single bad blocks
define.LFS_BLOCK_COUNT = 256 # small bd so test runs faster
define.LFS_ERASE_CYCLES = 0xffffffff
define.LFS_ERASE_VALUE = [0x00, 0xff, -1]
define.LFS_BADBLOCK_BEHAVIOR = [
'LFS_TESTBD_BADBLOCK_PROGERROR',
'LFS_TESTBD_BADBLOCK_ERASEERROR',
'LFS_TESTBD_BADBLOCK_READERROR',
'LFS_TESTBD_BADBLOCK_PROGNOOP',
'LFS_TESTBD_BADBLOCK_ERASENOOP',
]
define.NAMEMULT = 64
define.FILEMULT = 1
code = '''
for (lfs_block_t badblock = 2; badblock < LFS_BLOCK_COUNT; badblock++) {
lfs_testbd_setwear(&cfg, badblock-1, 0) => 0;
lfs_testbd_setwear(&cfg, badblock, 0xffffffff) => 0;
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int i = 1; i < 10; i++) {
for (int j = 0; j < NAMEMULT; j++) {
buffer[j] = '0'+i;
}
buffer[NAMEMULT] = '\0';
lfs_mkdir(&lfs, (char*)buffer) => 0;
buffer[NAMEMULT] = '/';
for (int j = 0; j < NAMEMULT; j++) {
buffer[j+NAMEMULT+1] = '0'+i;
}
buffer[2*NAMEMULT+1] = '\0';
lfs_file_open(&lfs, &file, (char*)buffer,
LFS_O_WRONLY | LFS_O_CREAT) => 0;
size = NAMEMULT;
for (int j = 0; j < i*FILEMULT; j++) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int i = 1; i < 10; i++) {
for (int j = 0; j < NAMEMULT; j++) {
buffer[j] = '0'+i;
}
buffer[NAMEMULT] = '\0';
lfs_stat(&lfs, (char*)buffer, &info) => 0;
info.type => LFS_TYPE_DIR;
buffer[NAMEMULT] = '/';
for (int j = 0; j < NAMEMULT; j++) {
buffer[j+NAMEMULT+1] = '0'+i;
}
buffer[2*NAMEMULT+1] = '\0';
lfs_file_open(&lfs, &file, (char*)buffer, LFS_O_RDONLY) => 0;
size = NAMEMULT;
for (int j = 0; j < i*FILEMULT; j++) {
uint8_t rbuffer[1024];
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(buffer, rbuffer, size) => 0;
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
}
'''
[[case]] # region corruption (causes cascading failures)
define.LFS_BLOCK_COUNT = 256 # small bd so test runs faster
define.LFS_ERASE_CYCLES = 0xffffffff
define.LFS_ERASE_VALUE = [0x00, 0xff, -1]
define.LFS_BADBLOCK_BEHAVIOR = [
'LFS_TESTBD_BADBLOCK_PROGERROR',
'LFS_TESTBD_BADBLOCK_ERASEERROR',
'LFS_TESTBD_BADBLOCK_READERROR',
'LFS_TESTBD_BADBLOCK_PROGNOOP',
'LFS_TESTBD_BADBLOCK_ERASENOOP',
]
define.NAMEMULT = 64
define.FILEMULT = 1
code = '''
for (lfs_block_t i = 0; i < (LFS_BLOCK_COUNT-2)/2; i++) {
lfs_testbd_setwear(&cfg, i+2, 0xffffffff) => 0;
}
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int i = 1; i < 10; i++) {
for (int j = 0; j < NAMEMULT; j++) {
buffer[j] = '0'+i;
}
buffer[NAMEMULT] = '\0';
lfs_mkdir(&lfs, (char*)buffer) => 0;
buffer[NAMEMULT] = '/';
for (int j = 0; j < NAMEMULT; j++) {
buffer[j+NAMEMULT+1] = '0'+i;
}
buffer[2*NAMEMULT+1] = '\0';
lfs_file_open(&lfs, &file, (char*)buffer,
LFS_O_WRONLY | LFS_O_CREAT) => 0;
size = NAMEMULT;
for (int j = 0; j < i*FILEMULT; j++) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int i = 1; i < 10; i++) {
for (int j = 0; j < NAMEMULT; j++) {
buffer[j] = '0'+i;
}
buffer[NAMEMULT] = '\0';
lfs_stat(&lfs, (char*)buffer, &info) => 0;
info.type => LFS_TYPE_DIR;
buffer[NAMEMULT] = '/';
for (int j = 0; j < NAMEMULT; j++) {
buffer[j+NAMEMULT+1] = '0'+i;
}
buffer[2*NAMEMULT+1] = '\0';
lfs_file_open(&lfs, &file, (char*)buffer, LFS_O_RDONLY) => 0;
size = NAMEMULT;
for (int j = 0; j < i*FILEMULT; j++) {
uint8_t rbuffer[1024];
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(buffer, rbuffer, size) => 0;
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
'''
[[case]] # alternating corruption (causes cascading failures)
define.LFS_BLOCK_COUNT = 256 # small bd so test runs faster
define.LFS_ERASE_CYCLES = 0xffffffff
define.LFS_ERASE_VALUE = [0x00, 0xff, -1]
define.LFS_BADBLOCK_BEHAVIOR = [
'LFS_TESTBD_BADBLOCK_PROGERROR',
'LFS_TESTBD_BADBLOCK_ERASEERROR',
'LFS_TESTBD_BADBLOCK_READERROR',
'LFS_TESTBD_BADBLOCK_PROGNOOP',
'LFS_TESTBD_BADBLOCK_ERASENOOP',
]
define.NAMEMULT = 64
define.FILEMULT = 1
code = '''
for (lfs_block_t i = 0; i < (LFS_BLOCK_COUNT-2)/2; i++) {
lfs_testbd_setwear(&cfg, (2*i) + 2, 0xffffffff) => 0;
}
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int i = 1; i < 10; i++) {
for (int j = 0; j < NAMEMULT; j++) {
buffer[j] = '0'+i;
}
buffer[NAMEMULT] = '\0';
lfs_mkdir(&lfs, (char*)buffer) => 0;
buffer[NAMEMULT] = '/';
for (int j = 0; j < NAMEMULT; j++) {
buffer[j+NAMEMULT+1] = '0'+i;
}
buffer[2*NAMEMULT+1] = '\0';
lfs_file_open(&lfs, &file, (char*)buffer,
LFS_O_WRONLY | LFS_O_CREAT) => 0;
size = NAMEMULT;
for (int j = 0; j < i*FILEMULT; j++) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int i = 1; i < 10; i++) {
for (int j = 0; j < NAMEMULT; j++) {
buffer[j] = '0'+i;
}
buffer[NAMEMULT] = '\0';
lfs_stat(&lfs, (char*)buffer, &info) => 0;
info.type => LFS_TYPE_DIR;
buffer[NAMEMULT] = '/';
for (int j = 0; j < NAMEMULT; j++) {
buffer[j+NAMEMULT+1] = '0'+i;
}
buffer[2*NAMEMULT+1] = '\0';
lfs_file_open(&lfs, &file, (char*)buffer, LFS_O_RDONLY) => 0;
size = NAMEMULT;
for (int j = 0; j < i*FILEMULT; j++) {
uint8_t rbuffer[1024];
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(buffer, rbuffer, size) => 0;
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
'''
# other corner cases
[[case]] # bad superblocks (corrupt 1 or 0)
define.LFS_ERASE_CYCLES = 0xffffffff
define.LFS_ERASE_VALUE = [0x00, 0xff, -1]
define.LFS_BADBLOCK_BEHAVIOR = [
'LFS_TESTBD_BADBLOCK_PROGERROR',
'LFS_TESTBD_BADBLOCK_ERASEERROR',
'LFS_TESTBD_BADBLOCK_READERROR',
'LFS_TESTBD_BADBLOCK_PROGNOOP',
'LFS_TESTBD_BADBLOCK_ERASENOOP',
]
code = '''
lfs_testbd_setwear(&cfg, 0, 0xffffffff) => 0;
lfs_testbd_setwear(&cfg, 1, 0xffffffff) => 0;
lfs_format(&lfs, &cfg) => LFS_ERR_NOSPC;
lfs_mount(&lfs, &cfg) => LFS_ERR_CORRUPT;
'''

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[[case]] # root
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # many directory creation
define.N = 'range(0, 100, 3)'
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int i = 0; i < N; i++) {
sprintf(path, "dir%03d", i);
lfs_mkdir(&lfs, path) => 0;
}
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
for (int i = 0; i < N; i++) {
sprintf(path, "dir%03d", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, path) == 0);
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # many directory removal
define.N = 'range(3, 100, 11)'
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int i = 0; i < N; i++) {
sprintf(path, "removeme%03d", i);
lfs_mkdir(&lfs, path) => 0;
}
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
for (int i = 0; i < N; i++) {
sprintf(path, "removeme%03d", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, path) == 0);
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs);
lfs_mount(&lfs, &cfg) => 0;
for (int i = 0; i < N; i++) {
sprintf(path, "removeme%03d", i);
lfs_remove(&lfs, path) => 0;
}
lfs_unmount(&lfs);
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # many directory rename
define.N = 'range(3, 100, 11)'
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int i = 0; i < N; i++) {
sprintf(path, "test%03d", i);
lfs_mkdir(&lfs, path) => 0;
}
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
for (int i = 0; i < N; i++) {
sprintf(path, "test%03d", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, path) == 0);
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs);
lfs_mount(&lfs, &cfg) => 0;
for (int i = 0; i < N; i++) {
char oldpath[128];
char newpath[128];
sprintf(oldpath, "test%03d", i);
sprintf(newpath, "tedd%03d", i);
lfs_rename(&lfs, oldpath, newpath) => 0;
}
lfs_unmount(&lfs);
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
for (int i = 0; i < N; i++) {
sprintf(path, "tedd%03d", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, path) == 0);
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs);
'''
[[case]] # reentrant many directory creation/rename/removal
define.N = [5, 11]
reentrant = true
code = '''
err = lfs_mount(&lfs, &cfg);
if (err) {
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
}
for (int i = 0; i < N; i++) {
sprintf(path, "hi%03d", i);
err = lfs_mkdir(&lfs, path);
assert(err == 0 || err == LFS_ERR_EXIST);
}
for (int i = 0; i < N; i++) {
sprintf(path, "hello%03d", i);
err = lfs_remove(&lfs, path);
assert(err == 0 || err == LFS_ERR_NOENT);
}
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
for (int i = 0; i < N; i++) {
sprintf(path, "hi%03d", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, path) == 0);
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
for (int i = 0; i < N; i++) {
char oldpath[128];
char newpath[128];
sprintf(oldpath, "hi%03d", i);
sprintf(newpath, "hello%03d", i);
// YES this can overwrite an existing newpath
lfs_rename(&lfs, oldpath, newpath) => 0;
}
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
for (int i = 0; i < N; i++) {
sprintf(path, "hello%03d", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, path) == 0);
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
for (int i = 0; i < N; i++) {
sprintf(path, "hello%03d", i);
lfs_remove(&lfs, path) => 0;
}
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # file creation
define.N = 'range(3, 100, 11)'
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int i = 0; i < N; i++) {
sprintf(path, "file%03d", i);
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
for (int i = 0; i < N; i++) {
sprintf(path, "file%03d", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_REG);
assert(strcmp(info.name, path) == 0);
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs);
'''
[[case]] # file removal
define.N = 'range(0, 100, 3)'
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int i = 0; i < N; i++) {
sprintf(path, "removeme%03d", i);
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
for (int i = 0; i < N; i++) {
sprintf(path, "removeme%03d", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_REG);
assert(strcmp(info.name, path) == 0);
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs);
lfs_mount(&lfs, &cfg) => 0;
for (int i = 0; i < N; i++) {
sprintf(path, "removeme%03d", i);
lfs_remove(&lfs, path) => 0;
}
lfs_unmount(&lfs);
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # file rename
define.N = 'range(0, 100, 3)'
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int i = 0; i < N; i++) {
sprintf(path, "test%03d", i);
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
for (int i = 0; i < N; i++) {
sprintf(path, "test%03d", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_REG);
assert(strcmp(info.name, path) == 0);
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs);
lfs_mount(&lfs, &cfg) => 0;
for (int i = 0; i < N; i++) {
char oldpath[128];
char newpath[128];
sprintf(oldpath, "test%03d", i);
sprintf(newpath, "tedd%03d", i);
lfs_rename(&lfs, oldpath, newpath) => 0;
}
lfs_unmount(&lfs);
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
for (int i = 0; i < N; i++) {
sprintf(path, "tedd%03d", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_REG);
assert(strcmp(info.name, path) == 0);
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs);
'''
[[case]] # reentrant file creation/rename/removal
define.N = [5, 25]
reentrant = true
code = '''
err = lfs_mount(&lfs, &cfg);
if (err) {
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
}
for (int i = 0; i < N; i++) {
sprintf(path, "hi%03d", i);
lfs_file_open(&lfs, &file, path, LFS_O_CREAT | LFS_O_WRONLY) => 0;
lfs_file_close(&lfs, &file) => 0;
}
for (int i = 0; i < N; i++) {
sprintf(path, "hello%03d", i);
err = lfs_remove(&lfs, path);
assert(err == 0 || err == LFS_ERR_NOENT);
}
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
for (int i = 0; i < N; i++) {
sprintf(path, "hi%03d", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_REG);
assert(strcmp(info.name, path) == 0);
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
for (int i = 0; i < N; i++) {
char oldpath[128];
char newpath[128];
sprintf(oldpath, "hi%03d", i);
sprintf(newpath, "hello%03d", i);
// YES this can overwrite an existing newpath
lfs_rename(&lfs, oldpath, newpath) => 0;
}
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
for (int i = 0; i < N; i++) {
sprintf(path, "hello%03d", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_REG);
assert(strcmp(info.name, path) == 0);
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
for (int i = 0; i < N; i++) {
sprintf(path, "hello%03d", i);
lfs_remove(&lfs, path) => 0;
}
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # nested directories
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "potato") => 0;
lfs_file_open(&lfs, &file, "burito",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "potato/baked") => 0;
lfs_mkdir(&lfs, "potato/sweet") => 0;
lfs_mkdir(&lfs, "potato/fried") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "potato") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
info.type => LFS_TYPE_DIR;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "..") == 0);
info.type => LFS_TYPE_DIR;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "baked") == 0);
info.type => LFS_TYPE_DIR;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "fried") == 0);
info.type => LFS_TYPE_DIR;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "sweet") == 0);
info.type => LFS_TYPE_DIR;
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs) => 0;
// try removing?
lfs_mount(&lfs, &cfg) => 0;
lfs_remove(&lfs, "potato") => LFS_ERR_NOTEMPTY;
lfs_unmount(&lfs) => 0;
// try renaming?
lfs_mount(&lfs, &cfg) => 0;
lfs_rename(&lfs, "potato", "coldpotato") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_rename(&lfs, "coldpotato", "warmpotato") => 0;
lfs_rename(&lfs, "warmpotato", "hotpotato") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_remove(&lfs, "potato") => LFS_ERR_NOENT;
lfs_remove(&lfs, "coldpotato") => LFS_ERR_NOENT;
lfs_remove(&lfs, "warmpotato") => LFS_ERR_NOENT;
lfs_remove(&lfs, "hotpotato") => LFS_ERR_NOTEMPTY;
lfs_unmount(&lfs) => 0;
// try cross-directory renaming
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "coldpotato") => 0;
lfs_rename(&lfs, "hotpotato/baked", "coldpotato/baked") => 0;
lfs_rename(&lfs, "coldpotato", "hotpotato") => LFS_ERR_NOTEMPTY;
lfs_remove(&lfs, "coldpotato") => LFS_ERR_NOTEMPTY;
lfs_remove(&lfs, "hotpotato") => LFS_ERR_NOTEMPTY;
lfs_rename(&lfs, "hotpotato/fried", "coldpotato/fried") => 0;
lfs_rename(&lfs, "coldpotato", "hotpotato") => LFS_ERR_NOTEMPTY;
lfs_remove(&lfs, "coldpotato") => LFS_ERR_NOTEMPTY;
lfs_remove(&lfs, "hotpotato") => LFS_ERR_NOTEMPTY;
lfs_rename(&lfs, "hotpotato/sweet", "coldpotato/sweet") => 0;
lfs_rename(&lfs, "coldpotato", "hotpotato") => 0;
lfs_remove(&lfs, "coldpotato") => LFS_ERR_NOENT;
lfs_remove(&lfs, "hotpotato") => LFS_ERR_NOTEMPTY;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "hotpotato") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
info.type => LFS_TYPE_DIR;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "..") == 0);
info.type => LFS_TYPE_DIR;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "baked") == 0);
info.type => LFS_TYPE_DIR;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "fried") == 0);
info.type => LFS_TYPE_DIR;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "sweet") == 0);
info.type => LFS_TYPE_DIR;
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs) => 0;
// final remove
lfs_mount(&lfs, &cfg) => 0;
lfs_remove(&lfs, "hotpotato") => LFS_ERR_NOTEMPTY;
lfs_remove(&lfs, "hotpotato/baked") => 0;
lfs_remove(&lfs, "hotpotato") => LFS_ERR_NOTEMPTY;
lfs_remove(&lfs, "hotpotato/fried") => 0;
lfs_remove(&lfs, "hotpotato") => LFS_ERR_NOTEMPTY;
lfs_remove(&lfs, "hotpotato/sweet") => 0;
lfs_remove(&lfs, "hotpotato") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
info.type => LFS_TYPE_DIR;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "..") == 0);
info.type => LFS_TYPE_DIR;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "burito") == 0);
info.type => LFS_TYPE_REG;
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # recursive remove
define.N = [10, 100]
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "prickly-pear") => 0;
for (int i = 0; i < N; i++) {
sprintf(path, "prickly-pear/cactus%03d", i);
lfs_mkdir(&lfs, path) => 0;
}
lfs_dir_open(&lfs, &dir, "prickly-pear") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
for (int i = 0; i < N; i++) {
sprintf(path, "cactus%03d", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, path) == 0);
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs);
lfs_mount(&lfs, &cfg) => 0;
lfs_remove(&lfs, "prickly-pear") => LFS_ERR_NOTEMPTY;
lfs_dir_open(&lfs, &dir, "prickly-pear") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
for (int i = 0; i < N; i++) {
sprintf(path, "cactus%03d", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, path) == 0);
sprintf(path, "prickly-pear/%s", info.name);
lfs_remove(&lfs, path) => 0;
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_remove(&lfs, "prickly-pear") => 0;
lfs_remove(&lfs, "prickly-pear") => LFS_ERR_NOENT;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_remove(&lfs, "prickly-pear") => LFS_ERR_NOENT;
lfs_unmount(&lfs) => 0;
'''
[[case]] # other error cases
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "potato") => 0;
lfs_file_open(&lfs, &file, "burito",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "potato") => LFS_ERR_EXIST;
lfs_mkdir(&lfs, "burito") => LFS_ERR_EXIST;
lfs_file_open(&lfs, &file, "burito",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
lfs_file_open(&lfs, &file, "potato",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
lfs_dir_open(&lfs, &dir, "tomato") => LFS_ERR_NOENT;
lfs_dir_open(&lfs, &dir, "burito") => LFS_ERR_NOTDIR;
lfs_file_open(&lfs, &file, "tomato", LFS_O_RDONLY) => LFS_ERR_NOENT;
lfs_file_open(&lfs, &file, "potato", LFS_O_RDONLY) => LFS_ERR_ISDIR;
lfs_file_open(&lfs, &file, "tomato", LFS_O_WRONLY) => LFS_ERR_NOENT;
lfs_file_open(&lfs, &file, "potato", LFS_O_WRONLY) => LFS_ERR_ISDIR;
lfs_file_open(&lfs, &file, "potato",
LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
lfs_mkdir(&lfs, "/") => LFS_ERR_EXIST;
lfs_file_open(&lfs, &file, "/",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => LFS_ERR_EXIST;
lfs_file_open(&lfs, &file, "/", LFS_O_RDONLY) => LFS_ERR_ISDIR;
lfs_file_open(&lfs, &file, "/", LFS_O_WRONLY) => LFS_ERR_ISDIR;
lfs_file_open(&lfs, &file, "/",
LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_ISDIR;
// check that errors did not corrupt directory
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_REG);
assert(strcmp(info.name, "burito") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "potato") == 0);
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs) => 0;
// or on disk
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, ".") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "..") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_REG);
assert(strcmp(info.name, "burito") == 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(info.type == LFS_TYPE_DIR);
assert(strcmp(info.name, "potato") == 0);
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # directory seek
define.COUNT = [4, 128, 132]
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "hello") => 0;
for (int i = 0; i < COUNT; i++) {
sprintf(path, "hello/kitty%03d", i);
lfs_mkdir(&lfs, path) => 0;
}
lfs_unmount(&lfs) => 0;
for (int j = 2; j < COUNT; j++) {
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "hello") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_soff_t pos;
for (int i = 0; i < j; i++) {
sprintf(path, "kitty%03d", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, path) == 0);
assert(info.type == LFS_TYPE_DIR);
pos = lfs_dir_tell(&lfs, &dir);
assert(pos >= 0);
}
lfs_dir_seek(&lfs, &dir, pos) => 0;
sprintf(path, "kitty%03d", j);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, path) == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_rewind(&lfs, &dir) => 0;
sprintf(path, "kitty%03d", 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, path) == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_seek(&lfs, &dir, pos) => 0;
sprintf(path, "kitty%03d", j);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, path) == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs) => 0;
}
'''
[[case]] # root seek
define.COUNT = [4, 128, 132]
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int i = 0; i < COUNT; i++) {
sprintf(path, "hi%03d", i);
lfs_mkdir(&lfs, path) => 0;
}
lfs_unmount(&lfs) => 0;
for (int j = 2; j < COUNT; j++) {
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_soff_t pos;
for (int i = 0; i < j; i++) {
sprintf(path, "hi%03d", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, path) == 0);
assert(info.type == LFS_TYPE_DIR);
pos = lfs_dir_tell(&lfs, &dir);
assert(pos >= 0);
}
lfs_dir_seek(&lfs, &dir, pos) => 0;
sprintf(path, "hi%03d", j);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, path) == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_rewind(&lfs, &dir) => 0;
sprintf(path, "hi%03d", 0);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, path) == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_seek(&lfs, &dir, pos) => 0;
sprintf(path, "hi%03d", j);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, path) == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs) => 0;
}
'''

611
components/fs/littlefs/littlefs/tests/test_entries.toml Normal file
View file

@ -0,0 +1,611 @@
# These tests are for some specific corner cases with neighboring inline files.
# Note that these tests are intended for 512 byte inline sizes. They should
# still pass with other inline sizes but wouldn't be testing anything.
define.LFS_CACHE_SIZE = 512
if = 'LFS_CACHE_SIZE % LFS_PROG_SIZE == 0 && LFS_CACHE_SIZE == 512'
[[case]] # entry grow test
code = '''
uint8_t wbuffer[1024];
uint8_t rbuffer[1024];
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
// write hi0 20
sprintf(path, "hi0"); size = 20;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi1 20
sprintf(path, "hi1"); size = 20;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi2 20
sprintf(path, "hi2"); size = 20;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi3 20
sprintf(path, "hi3"); size = 20;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// read hi1 20
sprintf(path, "hi1"); size = 20;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// write hi1 200
sprintf(path, "hi1"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// read hi0 20
sprintf(path, "hi0"); size = 20;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi1 200
sprintf(path, "hi1"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi2 20
sprintf(path, "hi2"); size = 20;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi3 20
sprintf(path, "hi3"); size = 20;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # entry shrink test
code = '''
uint8_t wbuffer[1024];
uint8_t rbuffer[1024];
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
// write hi0 20
sprintf(path, "hi0"); size = 20;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi1 200
sprintf(path, "hi1"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi2 20
sprintf(path, "hi2"); size = 20;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi3 20
sprintf(path, "hi3"); size = 20;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// read hi1 200
sprintf(path, "hi1"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// write hi1 20
sprintf(path, "hi1"); size = 20;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// read hi0 20
sprintf(path, "hi0"); size = 20;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi1 20
sprintf(path, "hi1"); size = 20;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi2 20
sprintf(path, "hi2"); size = 20;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi3 20
sprintf(path, "hi3"); size = 20;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # entry spill test
code = '''
uint8_t wbuffer[1024];
uint8_t rbuffer[1024];
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
// write hi0 200
sprintf(path, "hi0"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi1 200
sprintf(path, "hi1"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi2 200
sprintf(path, "hi2"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi3 200
sprintf(path, "hi3"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// read hi0 200
sprintf(path, "hi0"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi1 200
sprintf(path, "hi1"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi2 200
sprintf(path, "hi2"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi3 200
sprintf(path, "hi3"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # entry push spill test
code = '''
uint8_t wbuffer[1024];
uint8_t rbuffer[1024];
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
// write hi0 200
sprintf(path, "hi0"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi1 20
sprintf(path, "hi1"); size = 20;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi2 200
sprintf(path, "hi2"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi3 200
sprintf(path, "hi3"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// read hi1 20
sprintf(path, "hi1"); size = 20;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// write hi1 200
sprintf(path, "hi1"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// read hi0 200
sprintf(path, "hi0"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi1 200
sprintf(path, "hi1"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi2 200
sprintf(path, "hi2"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi3 200
sprintf(path, "hi3"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # entry push spill two test
code = '''
uint8_t wbuffer[1024];
uint8_t rbuffer[1024];
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
// write hi0 200
sprintf(path, "hi0"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi1 20
sprintf(path, "hi1"); size = 20;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi2 200
sprintf(path, "hi2"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi3 200
sprintf(path, "hi3"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi4 200
sprintf(path, "hi4"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// read hi1 20
sprintf(path, "hi1"); size = 20;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// write hi1 200
sprintf(path, "hi1"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// read hi0 200
sprintf(path, "hi0"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi1 200
sprintf(path, "hi1"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi2 200
sprintf(path, "hi2"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi3 200
sprintf(path, "hi3"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi4 200
sprintf(path, "hi4"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # entry drop test
code = '''
uint8_t wbuffer[1024];
uint8_t rbuffer[1024];
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
// write hi0 200
sprintf(path, "hi0"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi1 200
sprintf(path, "hi1"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi2 200
sprintf(path, "hi2"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
// write hi3 200
sprintf(path, "hi3"); size = 200;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_close(&lfs, &file) => 0;
lfs_remove(&lfs, "hi1") => 0;
lfs_stat(&lfs, "hi1", &info) => LFS_ERR_NOENT;
// read hi0 200
sprintf(path, "hi0"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi2 200
sprintf(path, "hi2"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi3 200
sprintf(path, "hi3"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_remove(&lfs, "hi2") => 0;
lfs_stat(&lfs, "hi2", &info) => LFS_ERR_NOENT;
// read hi0 200
sprintf(path, "hi0"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
// read hi3 200
sprintf(path, "hi3"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_remove(&lfs, "hi3") => 0;
lfs_stat(&lfs, "hi3", &info) => LFS_ERR_NOENT;
// read hi0 200
sprintf(path, "hi0"); size = 200;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => size;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_remove(&lfs, "hi0") => 0;
lfs_stat(&lfs, "hi0", &info) => LFS_ERR_NOENT;
lfs_unmount(&lfs) => 0;
'''
[[case]] # create too big
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
memset(path, 'm', 200);
path[200] = '\0';
size = 400;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
uint8_t wbuffer[1024];
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_close(&lfs, &file) => 0;
size = 400;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
uint8_t rbuffer[1024];
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # resize too big
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
memset(path, 'm', 200);
path[200] = '\0';
size = 40;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
uint8_t wbuffer[1024];
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_close(&lfs, &file) => 0;
size = 40;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
uint8_t rbuffer[1024];
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
size = 400;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
memset(wbuffer, 'c', size);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_close(&lfs, &file) => 0;
size = 400;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
memcmp(rbuffer, wbuffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''

288
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# Tests for recovering from conditions which shouldn't normally
# happen during normal operation of littlefs
# invalid pointer tests (outside of block_count)
[[case]] # invalid tail-pointer test
define.TAIL_TYPE = ['LFS_TYPE_HARDTAIL', 'LFS_TYPE_SOFTTAIL']
define.INVALSET = [0x3, 0x1, 0x2]
in = "lfs.c"
code = '''
// create littlefs
lfs_format(&lfs, &cfg) => 0;
// change tail-pointer to invalid pointers
lfs_init(&lfs, &cfg) => 0;
lfs_mdir_t mdir;
lfs_dir_fetch(&lfs, &mdir, (lfs_block_t[2]){0, 1}) => 0;
lfs_dir_commit(&lfs, &mdir, LFS_MKATTRS(
{LFS_MKTAG(LFS_TYPE_HARDTAIL, 0x3ff, 8),
(lfs_block_t[2]){
(INVALSET & 0x1) ? 0xcccccccc : 0,
(INVALSET & 0x2) ? 0xcccccccc : 0}})) => 0;
lfs_deinit(&lfs) => 0;
// test that mount fails gracefully
lfs_mount(&lfs, &cfg) => LFS_ERR_CORRUPT;
'''
[[case]] # invalid dir pointer test
define.INVALSET = [0x3, 0x1, 0x2]
in = "lfs.c"
code = '''
// create littlefs
lfs_format(&lfs, &cfg) => 0;
// make a dir
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "dir_here") => 0;
lfs_unmount(&lfs) => 0;
// change the dir pointer to be invalid
lfs_init(&lfs, &cfg) => 0;
lfs_mdir_t mdir;
lfs_dir_fetch(&lfs, &mdir, (lfs_block_t[2]){0, 1}) => 0;
// make sure id 1 == our directory
lfs_dir_get(&lfs, &mdir,
LFS_MKTAG(0x700, 0x3ff, 0),
LFS_MKTAG(LFS_TYPE_NAME, 1, strlen("dir_here")), buffer)
=> LFS_MKTAG(LFS_TYPE_DIR, 1, strlen("dir_here"));
assert(memcmp((char*)buffer, "dir_here", strlen("dir_here")) == 0);
// change dir pointer
lfs_dir_commit(&lfs, &mdir, LFS_MKATTRS(
{LFS_MKTAG(LFS_TYPE_DIRSTRUCT, 1, 8),
(lfs_block_t[2]){
(INVALSET & 0x1) ? 0xcccccccc : 0,
(INVALSET & 0x2) ? 0xcccccccc : 0}})) => 0;
lfs_deinit(&lfs) => 0;
// test that accessing our bad dir fails, note there's a number
// of ways to access the dir, some can fail, but some don't
lfs_mount(&lfs, &cfg) => 0;
lfs_stat(&lfs, "dir_here", &info) => 0;
assert(strcmp(info.name, "dir_here") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_open(&lfs, &dir, "dir_here") => LFS_ERR_CORRUPT;
lfs_stat(&lfs, "dir_here/file_here", &info) => LFS_ERR_CORRUPT;
lfs_dir_open(&lfs, &dir, "dir_here/dir_here") => LFS_ERR_CORRUPT;
lfs_file_open(&lfs, &file, "dir_here/file_here",
LFS_O_RDONLY) => LFS_ERR_CORRUPT;
lfs_file_open(&lfs, &file, "dir_here/file_here",
LFS_O_WRONLY | LFS_O_CREAT) => LFS_ERR_CORRUPT;
lfs_unmount(&lfs) => 0;
'''
[[case]] # invalid file pointer test
in = "lfs.c"
define.SIZE = [10, 1000, 100000] # faked file size
code = '''
// create littlefs
lfs_format(&lfs, &cfg) => 0;
// make a file
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "file_here",
LFS_O_WRONLY | LFS_O_CREAT) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
// change the file pointer to be invalid
lfs_init(&lfs, &cfg) => 0;
lfs_mdir_t mdir;
lfs_dir_fetch(&lfs, &mdir, (lfs_block_t[2]){0, 1}) => 0;
// make sure id 1 == our file
lfs_dir_get(&lfs, &mdir,
LFS_MKTAG(0x700, 0x3ff, 0),
LFS_MKTAG(LFS_TYPE_NAME, 1, strlen("file_here")), buffer)
=> LFS_MKTAG(LFS_TYPE_REG, 1, strlen("file_here"));
assert(memcmp((char*)buffer, "file_here", strlen("file_here")) == 0);
// change file pointer
lfs_dir_commit(&lfs, &mdir, LFS_MKATTRS(
{LFS_MKTAG(LFS_TYPE_CTZSTRUCT, 1, sizeof(struct lfs_ctz)),
&(struct lfs_ctz){0xcccccccc, lfs_tole32(SIZE)}})) => 0;
lfs_deinit(&lfs) => 0;
// test that accessing our bad file fails, note there's a number
// of ways to access the dir, some can fail, but some don't
lfs_mount(&lfs, &cfg) => 0;
lfs_stat(&lfs, "file_here", &info) => 0;
assert(strcmp(info.name, "file_here") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
lfs_file_open(&lfs, &file, "file_here", LFS_O_RDONLY) => 0;
lfs_file_read(&lfs, &file, buffer, SIZE) => LFS_ERR_CORRUPT;
lfs_file_close(&lfs, &file) => 0;
// any allocs that traverse CTZ must unfortunately must fail
if (SIZE > 2*LFS_BLOCK_SIZE) {
lfs_mkdir(&lfs, "dir_here") => LFS_ERR_CORRUPT;
}
lfs_unmount(&lfs) => 0;
'''
[[case]] # invalid pointer in CTZ skip-list test
define.SIZE = ['2*LFS_BLOCK_SIZE', '3*LFS_BLOCK_SIZE', '4*LFS_BLOCK_SIZE']
in = "lfs.c"
code = '''
// create littlefs
lfs_format(&lfs, &cfg) => 0;
// make a file
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "file_here",
LFS_O_WRONLY | LFS_O_CREAT) => 0;
for (int i = 0; i < SIZE; i++) {
char c = 'c';
lfs_file_write(&lfs, &file, &c, 1) => 1;
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
// change pointer in CTZ skip-list to be invalid
lfs_init(&lfs, &cfg) => 0;
lfs_mdir_t mdir;
lfs_dir_fetch(&lfs, &mdir, (lfs_block_t[2]){0, 1}) => 0;
// make sure id 1 == our file and get our CTZ structure
lfs_dir_get(&lfs, &mdir,
LFS_MKTAG(0x700, 0x3ff, 0),
LFS_MKTAG(LFS_TYPE_NAME, 1, strlen("file_here")), buffer)
=> LFS_MKTAG(LFS_TYPE_REG, 1, strlen("file_here"));
assert(memcmp((char*)buffer, "file_here", strlen("file_here")) == 0);
struct lfs_ctz ctz;
lfs_dir_get(&lfs, &mdir,
LFS_MKTAG(0x700, 0x3ff, 0),
LFS_MKTAG(LFS_TYPE_STRUCT, 1, sizeof(struct lfs_ctz)), &ctz)
=> LFS_MKTAG(LFS_TYPE_CTZSTRUCT, 1, sizeof(struct lfs_ctz));
lfs_ctz_fromle32(&ctz);
// rewrite block to contain bad pointer
uint8_t bbuffer[LFS_BLOCK_SIZE];
cfg.read(&cfg, ctz.head, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
uint32_t bad = lfs_tole32(0xcccccccc);
memcpy(&bbuffer[0], &bad, sizeof(bad));
memcpy(&bbuffer[4], &bad, sizeof(bad));
cfg.erase(&cfg, ctz.head) => 0;
cfg.prog(&cfg, ctz.head, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
lfs_deinit(&lfs) => 0;
// test that accessing our bad file fails, note there's a number
// of ways to access the dir, some can fail, but some don't
lfs_mount(&lfs, &cfg) => 0;
lfs_stat(&lfs, "file_here", &info) => 0;
assert(strcmp(info.name, "file_here") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
lfs_file_open(&lfs, &file, "file_here", LFS_O_RDONLY) => 0;
lfs_file_read(&lfs, &file, buffer, SIZE) => LFS_ERR_CORRUPT;
lfs_file_close(&lfs, &file) => 0;
// any allocs that traverse CTZ must unfortunately must fail
if (SIZE > 2*LFS_BLOCK_SIZE) {
lfs_mkdir(&lfs, "dir_here") => LFS_ERR_CORRUPT;
}
lfs_unmount(&lfs) => 0;
'''
[[case]] # invalid gstate pointer
define.INVALSET = [0x3, 0x1, 0x2]
in = "lfs.c"
code = '''
// create littlefs
lfs_format(&lfs, &cfg) => 0;
// create an invalid gstate
lfs_init(&lfs, &cfg) => 0;
lfs_mdir_t mdir;
lfs_dir_fetch(&lfs, &mdir, (lfs_block_t[2]){0, 1}) => 0;
lfs_fs_prepmove(&lfs, 1, (lfs_block_t [2]){
(INVALSET & 0x1) ? 0xcccccccc : 0,
(INVALSET & 0x2) ? 0xcccccccc : 0});
lfs_dir_commit(&lfs, &mdir, NULL, 0) => 0;
lfs_deinit(&lfs) => 0;
// test that mount fails gracefully
// mount may not fail, but our first alloc should fail when
// we try to fix the gstate
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "should_fail") => LFS_ERR_CORRUPT;
lfs_unmount(&lfs) => 0;
'''
# cycle detection/recovery tests
[[case]] # metadata-pair threaded-list loop test
in = "lfs.c"
code = '''
// create littlefs
lfs_format(&lfs, &cfg) => 0;
// change tail-pointer to point to ourself
lfs_init(&lfs, &cfg) => 0;
lfs_mdir_t mdir;
lfs_dir_fetch(&lfs, &mdir, (lfs_block_t[2]){0, 1}) => 0;
lfs_dir_commit(&lfs, &mdir, LFS_MKATTRS(
{LFS_MKTAG(LFS_TYPE_HARDTAIL, 0x3ff, 8),
(lfs_block_t[2]){0, 1}})) => 0;
lfs_deinit(&lfs) => 0;
// test that mount fails gracefully
lfs_mount(&lfs, &cfg) => LFS_ERR_CORRUPT;
'''
[[case]] # metadata-pair threaded-list 2-length loop test
in = "lfs.c"
code = '''
// create littlefs with child dir
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "child") => 0;
lfs_unmount(&lfs) => 0;
// find child
lfs_init(&lfs, &cfg) => 0;
lfs_mdir_t mdir;
lfs_block_t pair[2];
lfs_dir_fetch(&lfs, &mdir, (lfs_block_t[2]){0, 1}) => 0;
lfs_dir_get(&lfs, &mdir,
LFS_MKTAG(0x7ff, 0x3ff, 0),
LFS_MKTAG(LFS_TYPE_DIRSTRUCT, 1, sizeof(pair)), pair)
=> LFS_MKTAG(LFS_TYPE_DIRSTRUCT, 1, sizeof(pair));
lfs_pair_fromle32(pair);
// change tail-pointer to point to root
lfs_dir_fetch(&lfs, &mdir, pair) => 0;
lfs_dir_commit(&lfs, &mdir, LFS_MKATTRS(
{LFS_MKTAG(LFS_TYPE_HARDTAIL, 0x3ff, 8),
(lfs_block_t[2]){0, 1}})) => 0;
lfs_deinit(&lfs) => 0;
// test that mount fails gracefully
lfs_mount(&lfs, &cfg) => LFS_ERR_CORRUPT;
'''
[[case]] # metadata-pair threaded-list 1-length child loop test
in = "lfs.c"
code = '''
// create littlefs with child dir
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "child") => 0;
lfs_unmount(&lfs) => 0;
// find child
lfs_init(&lfs, &cfg) => 0;
lfs_mdir_t mdir;
lfs_block_t pair[2];
lfs_dir_fetch(&lfs, &mdir, (lfs_block_t[2]){0, 1}) => 0;
lfs_dir_get(&lfs, &mdir,
LFS_MKTAG(0x7ff, 0x3ff, 0),
LFS_MKTAG(LFS_TYPE_DIRSTRUCT, 1, sizeof(pair)), pair)
=> LFS_MKTAG(LFS_TYPE_DIRSTRUCT, 1, sizeof(pair));
lfs_pair_fromle32(pair);
// change tail-pointer to point to ourself
lfs_dir_fetch(&lfs, &mdir, pair) => 0;
lfs_dir_commit(&lfs, &mdir, LFS_MKATTRS(
{LFS_MKTAG(LFS_TYPE_HARDTAIL, 0x3ff, 8), pair})) => 0;
lfs_deinit(&lfs) => 0;
// test that mount fails gracefully
lfs_mount(&lfs, &cfg) => LFS_ERR_CORRUPT;
'''

465
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[[case]] # test running a filesystem to exhaustion
define.LFS_ERASE_CYCLES = 10
define.LFS_BLOCK_COUNT = 256 # small bd so test runs faster
define.LFS_BLOCK_CYCLES = 'LFS_ERASE_CYCLES / 2'
define.LFS_BADBLOCK_BEHAVIOR = [
'LFS_TESTBD_BADBLOCK_PROGERROR',
'LFS_TESTBD_BADBLOCK_ERASEERROR',
'LFS_TESTBD_BADBLOCK_READERROR',
'LFS_TESTBD_BADBLOCK_PROGNOOP',
'LFS_TESTBD_BADBLOCK_ERASENOOP',
]
define.FILES = 10
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "roadrunner") => 0;
lfs_unmount(&lfs) => 0;
uint32_t cycle = 0;
while (true) {
lfs_mount(&lfs, &cfg) => 0;
for (uint32_t i = 0; i < FILES; i++) {
// chose name, roughly random seed, and random 2^n size
sprintf(path, "roadrunner/test%d", i);
srand(cycle * i);
size = 1 << ((rand() % 10)+2);
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
for (lfs_size_t j = 0; j < size; j++) {
char c = 'a' + (rand() % 26);
lfs_ssize_t res = lfs_file_write(&lfs, &file, &c, 1);
assert(res == 1 || res == LFS_ERR_NOSPC);
if (res == LFS_ERR_NOSPC) {
err = lfs_file_close(&lfs, &file);
assert(err == 0 || err == LFS_ERR_NOSPC);
lfs_unmount(&lfs) => 0;
goto exhausted;
}
}
err = lfs_file_close(&lfs, &file);
assert(err == 0 || err == LFS_ERR_NOSPC);
if (err == LFS_ERR_NOSPC) {
lfs_unmount(&lfs) => 0;
goto exhausted;
}
}
for (uint32_t i = 0; i < FILES; i++) {
// check for errors
sprintf(path, "roadrunner/test%d", i);
srand(cycle * i);
size = 1 << ((rand() % 10)+2);
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
for (lfs_size_t j = 0; j < size; j++) {
char c = 'a' + (rand() % 26);
char r;
lfs_file_read(&lfs, &file, &r, 1) => 1;
assert(r == c);
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
cycle += 1;
}
exhausted:
// should still be readable
lfs_mount(&lfs, &cfg) => 0;
for (uint32_t i = 0; i < FILES; i++) {
// check for errors
sprintf(path, "roadrunner/test%d", i);
lfs_stat(&lfs, path, &info) => 0;
}
lfs_unmount(&lfs) => 0;
LFS_WARN("completed %d cycles", cycle);
'''
[[case]] # test running a filesystem to exhaustion
# which also requires expanding superblocks
define.LFS_ERASE_CYCLES = 10
define.LFS_BLOCK_COUNT = 256 # small bd so test runs faster
define.LFS_BLOCK_CYCLES = 'LFS_ERASE_CYCLES / 2'
define.LFS_BADBLOCK_BEHAVIOR = [
'LFS_TESTBD_BADBLOCK_PROGERROR',
'LFS_TESTBD_BADBLOCK_ERASEERROR',
'LFS_TESTBD_BADBLOCK_READERROR',
'LFS_TESTBD_BADBLOCK_PROGNOOP',
'LFS_TESTBD_BADBLOCK_ERASENOOP',
]
define.FILES = 10
code = '''
lfs_format(&lfs, &cfg) => 0;
uint32_t cycle = 0;
while (true) {
lfs_mount(&lfs, &cfg) => 0;
for (uint32_t i = 0; i < FILES; i++) {
// chose name, roughly random seed, and random 2^n size
sprintf(path, "test%d", i);
srand(cycle * i);
size = 1 << ((rand() % 10)+2);
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
for (lfs_size_t j = 0; j < size; j++) {
char c = 'a' + (rand() % 26);
lfs_ssize_t res = lfs_file_write(&lfs, &file, &c, 1);
assert(res == 1 || res == LFS_ERR_NOSPC);
if (res == LFS_ERR_NOSPC) {
err = lfs_file_close(&lfs, &file);
assert(err == 0 || err == LFS_ERR_NOSPC);
lfs_unmount(&lfs) => 0;
goto exhausted;
}
}
err = lfs_file_close(&lfs, &file);
assert(err == 0 || err == LFS_ERR_NOSPC);
if (err == LFS_ERR_NOSPC) {
lfs_unmount(&lfs) => 0;
goto exhausted;
}
}
for (uint32_t i = 0; i < FILES; i++) {
// check for errors
sprintf(path, "test%d", i);
srand(cycle * i);
size = 1 << ((rand() % 10)+2);
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
for (lfs_size_t j = 0; j < size; j++) {
char c = 'a' + (rand() % 26);
char r;
lfs_file_read(&lfs, &file, &r, 1) => 1;
assert(r == c);
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
cycle += 1;
}
exhausted:
// should still be readable
lfs_mount(&lfs, &cfg) => 0;
for (uint32_t i = 0; i < FILES; i++) {
// check for errors
sprintf(path, "test%d", i);
lfs_stat(&lfs, path, &info) => 0;
}
lfs_unmount(&lfs) => 0;
LFS_WARN("completed %d cycles", cycle);
'''
# These are a sort of high-level litmus test for wear-leveling. One definition
# of wear-leveling is that increasing a block device's space translates directly
# into increasing the block devices lifetime. This is something we can actually
# check for.
[[case]] # wear-level test running a filesystem to exhaustion
define.LFS_ERASE_CYCLES = 20
define.LFS_BLOCK_COUNT = 256 # small bd so test runs faster
define.LFS_BLOCK_CYCLES = 'LFS_ERASE_CYCLES / 2'
define.FILES = 10
code = '''
uint32_t run_cycles[2];
const uint32_t run_block_count[2] = {LFS_BLOCK_COUNT/2, LFS_BLOCK_COUNT};
for (int run = 0; run < 2; run++) {
for (lfs_block_t b = 0; b < LFS_BLOCK_COUNT; b++) {
lfs_testbd_setwear(&cfg, b,
(b < run_block_count[run]) ? 0 : LFS_ERASE_CYCLES) => 0;
}
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "roadrunner") => 0;
lfs_unmount(&lfs) => 0;
uint32_t cycle = 0;
while (true) {
lfs_mount(&lfs, &cfg) => 0;
for (uint32_t i = 0; i < FILES; i++) {
// chose name, roughly random seed, and random 2^n size
sprintf(path, "roadrunner/test%d", i);
srand(cycle * i);
size = 1 << ((rand() % 10)+2);
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
for (lfs_size_t j = 0; j < size; j++) {
char c = 'a' + (rand() % 26);
lfs_ssize_t res = lfs_file_write(&lfs, &file, &c, 1);
assert(res == 1 || res == LFS_ERR_NOSPC);
if (res == LFS_ERR_NOSPC) {
err = lfs_file_close(&lfs, &file);
assert(err == 0 || err == LFS_ERR_NOSPC);
lfs_unmount(&lfs) => 0;
goto exhausted;
}
}
err = lfs_file_close(&lfs, &file);
assert(err == 0 || err == LFS_ERR_NOSPC);
if (err == LFS_ERR_NOSPC) {
lfs_unmount(&lfs) => 0;
goto exhausted;
}
}
for (uint32_t i = 0; i < FILES; i++) {
// check for errors
sprintf(path, "roadrunner/test%d", i);
srand(cycle * i);
size = 1 << ((rand() % 10)+2);
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
for (lfs_size_t j = 0; j < size; j++) {
char c = 'a' + (rand() % 26);
char r;
lfs_file_read(&lfs, &file, &r, 1) => 1;
assert(r == c);
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
cycle += 1;
}
exhausted:
// should still be readable
lfs_mount(&lfs, &cfg) => 0;
for (uint32_t i = 0; i < FILES; i++) {
// check for errors
sprintf(path, "roadrunner/test%d", i);
lfs_stat(&lfs, path, &info) => 0;
}
lfs_unmount(&lfs) => 0;
run_cycles[run] = cycle;
LFS_WARN("completed %d blocks %d cycles",
run_block_count[run], run_cycles[run]);
}
// check we increased the lifetime by 2x with ~10% error
LFS_ASSERT(run_cycles[1]*110/100 > 2*run_cycles[0]);
'''
[[case]] # wear-level test + expanding superblock
define.LFS_ERASE_CYCLES = 20
define.LFS_BLOCK_COUNT = 256 # small bd so test runs faster
define.LFS_BLOCK_CYCLES = 'LFS_ERASE_CYCLES / 2'
define.FILES = 10
code = '''
uint32_t run_cycles[2];
const uint32_t run_block_count[2] = {LFS_BLOCK_COUNT/2, LFS_BLOCK_COUNT};
for (int run = 0; run < 2; run++) {
for (lfs_block_t b = 0; b < LFS_BLOCK_COUNT; b++) {
lfs_testbd_setwear(&cfg, b,
(b < run_block_count[run]) ? 0 : LFS_ERASE_CYCLES) => 0;
}
lfs_format(&lfs, &cfg) => 0;
uint32_t cycle = 0;
while (true) {
lfs_mount(&lfs, &cfg) => 0;
for (uint32_t i = 0; i < FILES; i++) {
// chose name, roughly random seed, and random 2^n size
sprintf(path, "test%d", i);
srand(cycle * i);
size = 1 << ((rand() % 10)+2);
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
for (lfs_size_t j = 0; j < size; j++) {
char c = 'a' + (rand() % 26);
lfs_ssize_t res = lfs_file_write(&lfs, &file, &c, 1);
assert(res == 1 || res == LFS_ERR_NOSPC);
if (res == LFS_ERR_NOSPC) {
err = lfs_file_close(&lfs, &file);
assert(err == 0 || err == LFS_ERR_NOSPC);
lfs_unmount(&lfs) => 0;
goto exhausted;
}
}
err = lfs_file_close(&lfs, &file);
assert(err == 0 || err == LFS_ERR_NOSPC);
if (err == LFS_ERR_NOSPC) {
lfs_unmount(&lfs) => 0;
goto exhausted;
}
}
for (uint32_t i = 0; i < FILES; i++) {
// check for errors
sprintf(path, "test%d", i);
srand(cycle * i);
size = 1 << ((rand() % 10)+2);
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
for (lfs_size_t j = 0; j < size; j++) {
char c = 'a' + (rand() % 26);
char r;
lfs_file_read(&lfs, &file, &r, 1) => 1;
assert(r == c);
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
cycle += 1;
}
exhausted:
// should still be readable
lfs_mount(&lfs, &cfg) => 0;
for (uint32_t i = 0; i < FILES; i++) {
// check for errors
sprintf(path, "test%d", i);
lfs_stat(&lfs, path, &info) => 0;
}
lfs_unmount(&lfs) => 0;
run_cycles[run] = cycle;
LFS_WARN("completed %d blocks %d cycles",
run_block_count[run], run_cycles[run]);
}
// check we increased the lifetime by 2x with ~10% error
LFS_ASSERT(run_cycles[1]*110/100 > 2*run_cycles[0]);
'''
[[case]] # test that we wear blocks roughly evenly
define.LFS_ERASE_CYCLES = 0xffffffff
define.LFS_BLOCK_COUNT = 256 # small bd so test runs faster
define.LFS_BLOCK_CYCLES = [5, 4, 3, 2, 1]
define.CYCLES = 100
define.FILES = 10
if = 'LFS_BLOCK_CYCLES < CYCLES/10'
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "roadrunner") => 0;
lfs_unmount(&lfs) => 0;
uint32_t cycle = 0;
while (cycle < CYCLES) {
lfs_mount(&lfs, &cfg) => 0;
for (uint32_t i = 0; i < FILES; i++) {
// chose name, roughly random seed, and random 2^n size
sprintf(path, "roadrunner/test%d", i);
srand(cycle * i);
size = 1 << 4; //((rand() % 10)+2);
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
for (lfs_size_t j = 0; j < size; j++) {
char c = 'a' + (rand() % 26);
lfs_ssize_t res = lfs_file_write(&lfs, &file, &c, 1);
assert(res == 1 || res == LFS_ERR_NOSPC);
if (res == LFS_ERR_NOSPC) {
err = lfs_file_close(&lfs, &file);
assert(err == 0 || err == LFS_ERR_NOSPC);
lfs_unmount(&lfs) => 0;
goto exhausted;
}
}
err = lfs_file_close(&lfs, &file);
assert(err == 0 || err == LFS_ERR_NOSPC);
if (err == LFS_ERR_NOSPC) {
lfs_unmount(&lfs) => 0;
goto exhausted;
}
}
for (uint32_t i = 0; i < FILES; i++) {
// check for errors
sprintf(path, "roadrunner/test%d", i);
srand(cycle * i);
size = 1 << 4; //((rand() % 10)+2);
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
for (lfs_size_t j = 0; j < size; j++) {
char c = 'a' + (rand() % 26);
char r;
lfs_file_read(&lfs, &file, &r, 1) => 1;
assert(r == c);
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
cycle += 1;
}
exhausted:
// should still be readable
lfs_mount(&lfs, &cfg) => 0;
for (uint32_t i = 0; i < FILES; i++) {
// check for errors
sprintf(path, "roadrunner/test%d", i);
lfs_stat(&lfs, path, &info) => 0;
}
lfs_unmount(&lfs) => 0;
LFS_WARN("completed %d cycles", cycle);
// check the wear on our block device
lfs_testbd_wear_t minwear = -1;
lfs_testbd_wear_t totalwear = 0;
lfs_testbd_wear_t maxwear = 0;
// skip 0 and 1 as superblock movement is intentionally avoided
for (lfs_block_t b = 2; b < LFS_BLOCK_COUNT; b++) {
lfs_testbd_wear_t wear = lfs_testbd_getwear(&cfg, b);
printf("%08x: wear %d\n", b, wear);
assert(wear >= 0);
if (wear < minwear) {
minwear = wear;
}
if (wear > maxwear) {
maxwear = wear;
}
totalwear += wear;
}
lfs_testbd_wear_t avgwear = totalwear / LFS_BLOCK_COUNT;
LFS_WARN("max wear: %d cycles", maxwear);
LFS_WARN("avg wear: %d cycles", totalwear / LFS_BLOCK_COUNT);
LFS_WARN("min wear: %d cycles", minwear);
// find standard deviation^2
lfs_testbd_wear_t dev2 = 0;
for (lfs_block_t b = 2; b < LFS_BLOCK_COUNT; b++) {
lfs_testbd_wear_t wear = lfs_testbd_getwear(&cfg, b);
assert(wear >= 0);
lfs_testbd_swear_t diff = wear - avgwear;
dev2 += diff*diff;
}
dev2 /= totalwear;
LFS_WARN("std dev^2: %d", dev2);
assert(dev2 < 8);
'''

486
components/fs/littlefs/littlefs/tests/test_files.toml Normal file
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[[case]] # simple file test
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "hello",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
size = strlen("Hello World!")+1;
strcpy((char*)buffer, "Hello World!");
lfs_file_write(&lfs, &file, buffer, size) => size;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "hello", LFS_O_RDONLY) => 0;
lfs_file_read(&lfs, &file, buffer, size) => size;
assert(strcmp((char*)buffer, "Hello World!") == 0);
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # larger files
define.SIZE = [32, 8192, 262144, 0, 7, 8193]
define.CHUNKSIZE = [31, 16, 33, 1, 1023]
code = '''
lfs_format(&lfs, &cfg) => 0;
// write
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "avacado",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
srand(1);
for (lfs_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
for (lfs_size_t b = 0; b < chunk; b++) {
buffer[b] = rand() & 0xff;
}
lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
// read
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => SIZE;
srand(1);
for (lfs_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
for (lfs_size_t b = 0; b < chunk; b++) {
assert(buffer[b] == (rand() & 0xff));
}
}
lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # rewriting files
define.SIZE1 = [32, 8192, 131072, 0, 7, 8193]
define.SIZE2 = [32, 8192, 131072, 0, 7, 8193]
define.CHUNKSIZE = [31, 16, 1]
code = '''
lfs_format(&lfs, &cfg) => 0;
// write
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "avacado",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
srand(1);
for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
for (lfs_size_t b = 0; b < chunk; b++) {
buffer[b] = rand() & 0xff;
}
lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
// read
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => SIZE1;
srand(1);
for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
for (lfs_size_t b = 0; b < chunk; b++) {
assert(buffer[b] == (rand() & 0xff));
}
}
lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
// rewrite
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "avacado", LFS_O_WRONLY) => 0;
srand(2);
for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
for (lfs_size_t b = 0; b < chunk; b++) {
buffer[b] = rand() & 0xff;
}
lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
// read
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => lfs_max(SIZE1, SIZE2);
srand(2);
for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
for (lfs_size_t b = 0; b < chunk; b++) {
assert(buffer[b] == (rand() & 0xff));
}
}
if (SIZE1 > SIZE2) {
srand(1);
for (lfs_size_t b = 0; b < SIZE2; b++) {
rand();
}
for (lfs_size_t i = SIZE2; i < SIZE1; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
for (lfs_size_t b = 0; b < chunk; b++) {
assert(buffer[b] == (rand() & 0xff));
}
}
}
lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # appending files
define.SIZE1 = [32, 8192, 131072, 0, 7, 8193]
define.SIZE2 = [32, 8192, 131072, 0, 7, 8193]
define.CHUNKSIZE = [31, 16, 1]
code = '''
lfs_format(&lfs, &cfg) => 0;
// write
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "avacado",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
srand(1);
for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
for (lfs_size_t b = 0; b < chunk; b++) {
buffer[b] = rand() & 0xff;
}
lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
// read
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => SIZE1;
srand(1);
for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
for (lfs_size_t b = 0; b < chunk; b++) {
assert(buffer[b] == (rand() & 0xff));
}
}
lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
// append
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "avacado", LFS_O_WRONLY | LFS_O_APPEND) => 0;
srand(2);
for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
for (lfs_size_t b = 0; b < chunk; b++) {
buffer[b] = rand() & 0xff;
}
lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
// read
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => SIZE1 + SIZE2;
srand(1);
for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
for (lfs_size_t b = 0; b < chunk; b++) {
assert(buffer[b] == (rand() & 0xff));
}
}
srand(2);
for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
for (lfs_size_t b = 0; b < chunk; b++) {
assert(buffer[b] == (rand() & 0xff));
}
}
lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # truncating files
define.SIZE1 = [32, 8192, 131072, 0, 7, 8193]
define.SIZE2 = [32, 8192, 131072, 0, 7, 8193]
define.CHUNKSIZE = [31, 16, 1]
code = '''
lfs_format(&lfs, &cfg) => 0;
// write
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "avacado",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
srand(1);
for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
for (lfs_size_t b = 0; b < chunk; b++) {
buffer[b] = rand() & 0xff;
}
lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
// read
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => SIZE1;
srand(1);
for (lfs_size_t i = 0; i < SIZE1; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE1-i);
lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
for (lfs_size_t b = 0; b < chunk; b++) {
assert(buffer[b] == (rand() & 0xff));
}
}
lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
// truncate
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "avacado", LFS_O_WRONLY | LFS_O_TRUNC) => 0;
srand(2);
for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
for (lfs_size_t b = 0; b < chunk; b++) {
buffer[b] = rand() & 0xff;
}
lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
// read
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => SIZE2;
srand(2);
for (lfs_size_t i = 0; i < SIZE2; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE2-i);
lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
for (lfs_size_t b = 0; b < chunk; b++) {
assert(buffer[b] == (rand() & 0xff));
}
}
lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # reentrant file writing
define.SIZE = [32, 0, 7, 2049]
define.CHUNKSIZE = [31, 16, 65]
reentrant = true
code = '''
err = lfs_mount(&lfs, &cfg);
if (err) {
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
}
err = lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY);
assert(err == LFS_ERR_NOENT || err == 0);
if (err == 0) {
// can only be 0 (new file) or full size
size = lfs_file_size(&lfs, &file);
assert(size == 0 || size == SIZE);
lfs_file_close(&lfs, &file) => 0;
}
// write
lfs_file_open(&lfs, &file, "avacado", LFS_O_WRONLY | LFS_O_CREAT) => 0;
srand(1);
for (lfs_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
for (lfs_size_t b = 0; b < chunk; b++) {
buffer[b] = rand() & 0xff;
}
lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
}
lfs_file_close(&lfs, &file) => 0;
// read
lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => SIZE;
srand(1);
for (lfs_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
for (lfs_size_t b = 0; b < chunk; b++) {
assert(buffer[b] == (rand() & 0xff));
}
}
lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # reentrant file writing with syncs
define = [
# append (O(n))
{MODE='LFS_O_APPEND', SIZE=[32, 0, 7, 2049], CHUNKSIZE=[31, 16, 65]},
# truncate (O(n^2))
{MODE='LFS_O_TRUNC', SIZE=[32, 0, 7, 200], CHUNKSIZE=[31, 16, 65]},
# rewrite (O(n^2))
{MODE=0, SIZE=[32, 0, 7, 200], CHUNKSIZE=[31, 16, 65]},
]
reentrant = true
code = '''
err = lfs_mount(&lfs, &cfg);
if (err) {
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
}
err = lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY);
assert(err == LFS_ERR_NOENT || err == 0);
if (err == 0) {
// with syncs we could be any size, but it at least must be valid data
size = lfs_file_size(&lfs, &file);
assert(size <= SIZE);
srand(1);
for (lfs_size_t i = 0; i < size; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, size-i);
lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
for (lfs_size_t b = 0; b < chunk; b++) {
assert(buffer[b] == (rand() & 0xff));
}
}
lfs_file_close(&lfs, &file) => 0;
}
// write
lfs_file_open(&lfs, &file, "avacado",
LFS_O_WRONLY | LFS_O_CREAT | MODE) => 0;
size = lfs_file_size(&lfs, &file);
assert(size <= SIZE);
srand(1);
lfs_size_t skip = (MODE == LFS_O_APPEND) ? size : 0;
for (lfs_size_t b = 0; b < skip; b++) {
rand();
}
for (lfs_size_t i = skip; i < SIZE; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
for (lfs_size_t b = 0; b < chunk; b++) {
buffer[b] = rand() & 0xff;
}
lfs_file_write(&lfs, &file, buffer, chunk) => chunk;
lfs_file_sync(&lfs, &file) => 0;
}
lfs_file_close(&lfs, &file) => 0;
// read
lfs_file_open(&lfs, &file, "avacado", LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => SIZE;
srand(1);
for (lfs_size_t i = 0; i < SIZE; i += CHUNKSIZE) {
lfs_size_t chunk = lfs_min(CHUNKSIZE, SIZE-i);
lfs_file_read(&lfs, &file, buffer, chunk) => chunk;
for (lfs_size_t b = 0; b < chunk; b++) {
assert(buffer[b] == (rand() & 0xff));
}
}
lfs_file_read(&lfs, &file, buffer, CHUNKSIZE) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # many files
define.N = 300
code = '''
lfs_format(&lfs, &cfg) => 0;
// create N files of 7 bytes
lfs_mount(&lfs, &cfg) => 0;
for (int i = 0; i < N; i++) {
sprintf(path, "file_%03d", i);
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
char wbuffer[1024];
size = 7;
snprintf(wbuffer, size, "Hi %03d", i);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_close(&lfs, &file) => 0;
char rbuffer[1024];
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
assert(strcmp(rbuffer, wbuffer) == 0);
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
'''
[[case]] # many files with power cycle
define.N = 300
code = '''
lfs_format(&lfs, &cfg) => 0;
// create N files of 7 bytes
lfs_mount(&lfs, &cfg) => 0;
for (int i = 0; i < N; i++) {
sprintf(path, "file_%03d", i);
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
char wbuffer[1024];
size = 7;
snprintf(wbuffer, size, "Hi %03d", i);
lfs_file_write(&lfs, &file, wbuffer, size) => size;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
char rbuffer[1024];
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
assert(strcmp(rbuffer, wbuffer) == 0);
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
'''
[[case]] # many files with power loss
define.N = 300
reentrant = true
code = '''
err = lfs_mount(&lfs, &cfg);
if (err) {
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
}
// create N files of 7 bytes
for (int i = 0; i < N; i++) {
sprintf(path, "file_%03d", i);
err = lfs_file_open(&lfs, &file, path, LFS_O_WRONLY | LFS_O_CREAT);
char wbuffer[1024];
size = 7;
snprintf(wbuffer, size, "Hi %03d", i);
if ((lfs_size_t)lfs_file_size(&lfs, &file) != size) {
lfs_file_write(&lfs, &file, wbuffer, size) => size;
}
lfs_file_close(&lfs, &file) => 0;
char rbuffer[1024];
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_read(&lfs, &file, rbuffer, size) => size;
assert(strcmp(rbuffer, wbuffer) == 0);
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
'''

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[[case]] # interspersed file test
define.SIZE = [10, 100]
define.FILES = [4, 10, 26]
code = '''
lfs_file_t files[FILES];
const char alphas[] = "abcdefghijklmnopqrstuvwxyz";
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int j = 0; j < FILES; j++) {
sprintf(path, "%c", alphas[j]);
lfs_file_open(&lfs, &files[j], path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
}
for (int i = 0; i < SIZE; i++) {
for (int j = 0; j < FILES; j++) {
lfs_file_write(&lfs, &files[j], &alphas[j], 1) => 1;
}
}
for (int j = 0; j < FILES; j++) {
lfs_file_close(&lfs, &files[j]);
}
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
for (int j = 0; j < FILES; j++) {
sprintf(path, "%c", alphas[j]);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, path) == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
for (int j = 0; j < FILES; j++) {
sprintf(path, "%c", alphas[j]);
lfs_file_open(&lfs, &files[j], path, LFS_O_RDONLY) => 0;
}
for (int i = 0; i < 10; i++) {
for (int j = 0; j < FILES; j++) {
lfs_file_read(&lfs, &files[j], buffer, 1) => 1;
assert(buffer[0] == alphas[j]);
}
}
for (int j = 0; j < FILES; j++) {
lfs_file_close(&lfs, &files[j]);
}
lfs_unmount(&lfs) => 0;
'''
[[case]] # interspersed remove file test
define.SIZE = [10, 100]
define.FILES = [4, 10, 26]
code = '''
const char alphas[] = "abcdefghijklmnopqrstuvwxyz";
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int j = 0; j < FILES; j++) {
sprintf(path, "%c", alphas[j]);
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
for (int i = 0; i < SIZE; i++) {
lfs_file_write(&lfs, &file, &alphas[j], 1) => 1;
}
lfs_file_close(&lfs, &file);
}
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "zzz", LFS_O_WRONLY | LFS_O_CREAT) => 0;
for (int j = 0; j < FILES; j++) {
lfs_file_write(&lfs, &file, (const void*)"~", 1) => 1;
lfs_file_sync(&lfs, &file) => 0;
sprintf(path, "%c", alphas[j]);
lfs_remove(&lfs, path) => 0;
}
lfs_file_close(&lfs, &file);
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "zzz") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == FILES);
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_file_open(&lfs, &file, "zzz", LFS_O_RDONLY) => 0;
for (int i = 0; i < FILES; i++) {
lfs_file_read(&lfs, &file, buffer, 1) => 1;
assert(buffer[0] == '~');
}
lfs_file_close(&lfs, &file);
lfs_unmount(&lfs) => 0;
'''
[[case]] # remove inconveniently test
define.SIZE = [10, 100]
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_t files[3];
lfs_file_open(&lfs, &files[0], "e", LFS_O_WRONLY | LFS_O_CREAT) => 0;
lfs_file_open(&lfs, &files[1], "f", LFS_O_WRONLY | LFS_O_CREAT) => 0;
lfs_file_open(&lfs, &files[2], "g", LFS_O_WRONLY | LFS_O_CREAT) => 0;
for (int i = 0; i < SIZE/2; i++) {
lfs_file_write(&lfs, &files[0], (const void*)"e", 1) => 1;
lfs_file_write(&lfs, &files[1], (const void*)"f", 1) => 1;
lfs_file_write(&lfs, &files[2], (const void*)"g", 1) => 1;
}
lfs_remove(&lfs, "f") => 0;
for (int i = 0; i < SIZE/2; i++) {
lfs_file_write(&lfs, &files[0], (const void*)"e", 1) => 1;
lfs_file_write(&lfs, &files[1], (const void*)"f", 1) => 1;
lfs_file_write(&lfs, &files[2], (const void*)"g", 1) => 1;
}
lfs_file_close(&lfs, &files[0]);
lfs_file_close(&lfs, &files[1]);
lfs_file_close(&lfs, &files[2]);
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "e") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "g") == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
lfs_file_open(&lfs, &files[0], "e", LFS_O_RDONLY) => 0;
lfs_file_open(&lfs, &files[1], "g", LFS_O_RDONLY) => 0;
for (int i = 0; i < SIZE; i++) {
lfs_file_read(&lfs, &files[0], buffer, 1) => 1;
assert(buffer[0] == 'e');
lfs_file_read(&lfs, &files[1], buffer, 1) => 1;
assert(buffer[0] == 'g');
}
lfs_file_close(&lfs, &files[0]);
lfs_file_close(&lfs, &files[1]);
lfs_unmount(&lfs) => 0;
'''
[[case]] # reentrant interspersed file test
define.SIZE = [10, 100]
define.FILES = [4, 10, 26]
reentrant = true
code = '''
lfs_file_t files[FILES];
const char alphas[] = "abcdefghijklmnopqrstuvwxyz";
err = lfs_mount(&lfs, &cfg);
if (err) {
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
}
for (int j = 0; j < FILES; j++) {
sprintf(path, "%c", alphas[j]);
lfs_file_open(&lfs, &files[j], path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
}
for (int i = 0; i < SIZE; i++) {
for (int j = 0; j < FILES; j++) {
size = lfs_file_size(&lfs, &files[j]);
assert((int)size >= 0);
if ((int)size <= i) {
lfs_file_write(&lfs, &files[j], &alphas[j], 1) => 1;
lfs_file_sync(&lfs, &files[j]) => 0;
}
}
}
for (int j = 0; j < FILES; j++) {
lfs_file_close(&lfs, &files[j]);
}
lfs_dir_open(&lfs, &dir, "/") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, ".") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, "..") == 0);
assert(info.type == LFS_TYPE_DIR);
for (int j = 0; j < FILES; j++) {
sprintf(path, "%c", alphas[j]);
lfs_dir_read(&lfs, &dir, &info) => 1;
assert(strcmp(info.name, path) == 0);
assert(info.type == LFS_TYPE_REG);
assert(info.size == SIZE);
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
for (int j = 0; j < FILES; j++) {
sprintf(path, "%c", alphas[j]);
lfs_file_open(&lfs, &files[j], path, LFS_O_RDONLY) => 0;
}
for (int i = 0; i < 10; i++) {
for (int j = 0; j < FILES; j++) {
lfs_file_read(&lfs, &files[j], buffer, 1) => 1;
assert(buffer[0] == alphas[j]);
}
}
for (int j = 0; j < FILES; j++) {
lfs_file_close(&lfs, &files[j]);
}
lfs_unmount(&lfs) => 0;
'''

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[[case]] # orphan test
in = "lfs.c"
if = 'LFS_PROG_SIZE <= 0x3fe' # only works with one crc per commit
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "parent") => 0;
lfs_mkdir(&lfs, "parent/orphan") => 0;
lfs_mkdir(&lfs, "parent/child") => 0;
lfs_remove(&lfs, "parent/orphan") => 0;
lfs_unmount(&lfs) => 0;
// corrupt the child's most recent commit, this should be the update
// to the linked-list entry, which should orphan the orphan. Note this
// makes a lot of assumptions about the remove operation.
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "parent/child") => 0;
lfs_block_t block = dir.m.pair[0];
lfs_dir_close(&lfs, &dir) => 0;
lfs_unmount(&lfs) => 0;
uint8_t bbuffer[LFS_BLOCK_SIZE];
cfg.read(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
int off = LFS_BLOCK_SIZE-1;
while (off >= 0 && bbuffer[off] == LFS_ERASE_VALUE) {
off -= 1;
}
memset(&bbuffer[off-3], LFS_BLOCK_SIZE, 3);
cfg.erase(&cfg, block) => 0;
cfg.prog(&cfg, block, 0, bbuffer, LFS_BLOCK_SIZE) => 0;
cfg.sync(&cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_stat(&lfs, "parent/orphan", &info) => LFS_ERR_NOENT;
lfs_stat(&lfs, "parent/child", &info) => 0;
lfs_fs_size(&lfs) => 8;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_stat(&lfs, "parent/orphan", &info) => LFS_ERR_NOENT;
lfs_stat(&lfs, "parent/child", &info) => 0;
lfs_fs_size(&lfs) => 8;
// this mkdir should both create a dir and deorphan, so size
// should be unchanged
lfs_mkdir(&lfs, "parent/otherchild") => 0;
lfs_stat(&lfs, "parent/orphan", &info) => LFS_ERR_NOENT;
lfs_stat(&lfs, "parent/child", &info) => 0;
lfs_stat(&lfs, "parent/otherchild", &info) => 0;
lfs_fs_size(&lfs) => 8;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_stat(&lfs, "parent/orphan", &info) => LFS_ERR_NOENT;
lfs_stat(&lfs, "parent/child", &info) => 0;
lfs_stat(&lfs, "parent/otherchild", &info) => 0;
lfs_fs_size(&lfs) => 8;
lfs_unmount(&lfs) => 0;
'''
[[case]] # reentrant testing for orphans, basically just spam mkdir/remove
reentrant = true
# TODO fix this case, caused by non-DAG trees
if = '!(DEPTH == 3 && LFS_CACHE_SIZE != 64)'
define = [
{FILES=6, DEPTH=1, CYCLES=20},
{FILES=26, DEPTH=1, CYCLES=20},
{FILES=3, DEPTH=3, CYCLES=20},
]
code = '''
err = lfs_mount(&lfs, &cfg);
if (err) {
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
}
srand(1);
const char alpha[] = "abcdefghijklmnopqrstuvwxyz";
for (int i = 0; i < CYCLES; i++) {
// create random path
char full_path[256];
for (int d = 0; d < DEPTH; d++) {
sprintf(&full_path[2*d], "/%c", alpha[rand() % FILES]);
}
// if it does not exist, we create it, else we destroy
int res = lfs_stat(&lfs, full_path, &info);
if (res == LFS_ERR_NOENT) {
// create each directory in turn, ignore if dir already exists
for (int d = 0; d < DEPTH; d++) {
strcpy(path, full_path);
path[2*d+2] = '\0';
err = lfs_mkdir(&lfs, path);
assert(!err || err == LFS_ERR_EXIST);
}
for (int d = 0; d < DEPTH; d++) {
strcpy(path, full_path);
path[2*d+2] = '\0';
lfs_stat(&lfs, path, &info) => 0;
assert(strcmp(info.name, &path[2*d+1]) == 0);
assert(info.type == LFS_TYPE_DIR);
}
} else {
// is valid dir?
assert(strcmp(info.name, &full_path[2*(DEPTH-1)+1]) == 0);
assert(info.type == LFS_TYPE_DIR);
// try to delete path in reverse order, ignore if dir is not empty
for (int d = DEPTH-1; d >= 0; d--) {
strcpy(path, full_path);
path[2*d+2] = '\0';
err = lfs_remove(&lfs, path);
assert(!err || err == LFS_ERR_NOTEMPTY);
}
lfs_stat(&lfs, full_path, &info) => LFS_ERR_NOENT;
}
}
lfs_unmount(&lfs) => 0;
'''

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[[case]] # simple path test
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "tea") => 0;
lfs_mkdir(&lfs, "tea/hottea") => 0;
lfs_mkdir(&lfs, "tea/warmtea") => 0;
lfs_mkdir(&lfs, "tea/coldtea") => 0;
lfs_stat(&lfs, "tea/hottea", &info) => 0;
assert(strcmp(info.name, "hottea") == 0);
lfs_stat(&lfs, "/tea/hottea", &info) => 0;
assert(strcmp(info.name, "hottea") == 0);
lfs_mkdir(&lfs, "/milk") => 0;
lfs_stat(&lfs, "/milk", &info) => 0;
assert(strcmp(info.name, "milk") == 0);
lfs_stat(&lfs, "milk", &info) => 0;
assert(strcmp(info.name, "milk") == 0);
lfs_unmount(&lfs) => 0;
'''
[[case]] # redundant slashes
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "tea") => 0;
lfs_mkdir(&lfs, "tea/hottea") => 0;
lfs_mkdir(&lfs, "tea/warmtea") => 0;
lfs_mkdir(&lfs, "tea/coldtea") => 0;
lfs_stat(&lfs, "/tea/hottea", &info) => 0;
assert(strcmp(info.name, "hottea") == 0);
lfs_stat(&lfs, "//tea//hottea", &info) => 0;
assert(strcmp(info.name, "hottea") == 0);
lfs_stat(&lfs, "///tea///hottea", &info) => 0;
assert(strcmp(info.name, "hottea") == 0);
lfs_mkdir(&lfs, "////milk") => 0;
lfs_stat(&lfs, "////milk", &info) => 0;
assert(strcmp(info.name, "milk") == 0);
lfs_stat(&lfs, "milk", &info) => 0;
assert(strcmp(info.name, "milk") == 0);
lfs_unmount(&lfs) => 0;
'''
[[case]] # dot path test
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "tea") => 0;
lfs_mkdir(&lfs, "tea/hottea") => 0;
lfs_mkdir(&lfs, "tea/warmtea") => 0;
lfs_mkdir(&lfs, "tea/coldtea") => 0;
lfs_stat(&lfs, "./tea/hottea", &info) => 0;
assert(strcmp(info.name, "hottea") == 0);
lfs_stat(&lfs, "/./tea/hottea", &info) => 0;
assert(strcmp(info.name, "hottea") == 0);
lfs_stat(&lfs, "/././tea/hottea", &info) => 0;
assert(strcmp(info.name, "hottea") == 0);
lfs_stat(&lfs, "/./tea/./hottea", &info) => 0;
assert(strcmp(info.name, "hottea") == 0);
lfs_mkdir(&lfs, "/./milk") => 0;
lfs_stat(&lfs, "/./milk", &info) => 0;
assert(strcmp(info.name, "milk") == 0);
lfs_stat(&lfs, "milk", &info) => 0;
assert(strcmp(info.name, "milk") == 0);
lfs_unmount(&lfs) => 0;
'''
[[case]] # dot dot path test
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "tea") => 0;
lfs_mkdir(&lfs, "tea/hottea") => 0;
lfs_mkdir(&lfs, "tea/warmtea") => 0;
lfs_mkdir(&lfs, "tea/coldtea") => 0;
lfs_mkdir(&lfs, "coffee") => 0;
lfs_mkdir(&lfs, "coffee/hotcoffee") => 0;
lfs_mkdir(&lfs, "coffee/warmcoffee") => 0;
lfs_mkdir(&lfs, "coffee/coldcoffee") => 0;
lfs_stat(&lfs, "coffee/../tea/hottea", &info) => 0;
assert(strcmp(info.name, "hottea") == 0);
lfs_stat(&lfs, "tea/coldtea/../hottea", &info) => 0;
assert(strcmp(info.name, "hottea") == 0);
lfs_stat(&lfs, "coffee/coldcoffee/../../tea/hottea", &info) => 0;
assert(strcmp(info.name, "hottea") == 0);
lfs_stat(&lfs, "coffee/../coffee/../tea/hottea", &info) => 0;
assert(strcmp(info.name, "hottea") == 0);
lfs_mkdir(&lfs, "coffee/../milk") => 0;
lfs_stat(&lfs, "coffee/../milk", &info) => 0;
strcmp(info.name, "milk") => 0;
lfs_stat(&lfs, "milk", &info) => 0;
strcmp(info.name, "milk") => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # trailing dot path test
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "tea") => 0;
lfs_mkdir(&lfs, "tea/hottea") => 0;
lfs_mkdir(&lfs, "tea/warmtea") => 0;
lfs_mkdir(&lfs, "tea/coldtea") => 0;
lfs_stat(&lfs, "tea/hottea/", &info) => 0;
assert(strcmp(info.name, "hottea") == 0);
lfs_stat(&lfs, "tea/hottea/.", &info) => 0;
assert(strcmp(info.name, "hottea") == 0);
lfs_stat(&lfs, "tea/hottea/./.", &info) => 0;
assert(strcmp(info.name, "hottea") == 0);
lfs_stat(&lfs, "tea/hottea/..", &info) => 0;
assert(strcmp(info.name, "tea") == 0);
lfs_stat(&lfs, "tea/hottea/../.", &info) => 0;
assert(strcmp(info.name, "tea") == 0);
lfs_unmount(&lfs) => 0;
'''
[[case]] # leading dot path test
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, ".milk") => 0;
lfs_stat(&lfs, ".milk", &info) => 0;
strcmp(info.name, ".milk") => 0;
lfs_stat(&lfs, "tea/.././.milk", &info) => 0;
strcmp(info.name, ".milk") => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # root dot dot path test
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "tea") => 0;
lfs_mkdir(&lfs, "tea/hottea") => 0;
lfs_mkdir(&lfs, "tea/warmtea") => 0;
lfs_mkdir(&lfs, "tea/coldtea") => 0;
lfs_mkdir(&lfs, "coffee") => 0;
lfs_mkdir(&lfs, "coffee/hotcoffee") => 0;
lfs_mkdir(&lfs, "coffee/warmcoffee") => 0;
lfs_mkdir(&lfs, "coffee/coldcoffee") => 0;
lfs_stat(&lfs, "coffee/../../../../../../tea/hottea", &info) => 0;
strcmp(info.name, "hottea") => 0;
lfs_mkdir(&lfs, "coffee/../../../../../../milk") => 0;
lfs_stat(&lfs, "coffee/../../../../../../milk", &info) => 0;
strcmp(info.name, "milk") => 0;
lfs_stat(&lfs, "milk", &info) => 0;
strcmp(info.name, "milk") => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # invalid path tests
code = '''
lfs_format(&lfs, &cfg);
lfs_mount(&lfs, &cfg) => 0;
lfs_stat(&lfs, "dirt", &info) => LFS_ERR_NOENT;
lfs_stat(&lfs, "dirt/ground", &info) => LFS_ERR_NOENT;
lfs_stat(&lfs, "dirt/ground/earth", &info) => LFS_ERR_NOENT;
lfs_remove(&lfs, "dirt") => LFS_ERR_NOENT;
lfs_remove(&lfs, "dirt/ground") => LFS_ERR_NOENT;
lfs_remove(&lfs, "dirt/ground/earth") => LFS_ERR_NOENT;
lfs_mkdir(&lfs, "dirt/ground") => LFS_ERR_NOENT;
lfs_file_open(&lfs, &file, "dirt/ground", LFS_O_WRONLY | LFS_O_CREAT)
=> LFS_ERR_NOENT;
lfs_mkdir(&lfs, "dirt/ground/earth") => LFS_ERR_NOENT;
lfs_file_open(&lfs, &file, "dirt/ground/earth", LFS_O_WRONLY | LFS_O_CREAT)
=> LFS_ERR_NOENT;
lfs_unmount(&lfs) => 0;
'''
[[case]] # root operations
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_stat(&lfs, "/", &info) => 0;
assert(strcmp(info.name, "/") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_mkdir(&lfs, "/") => LFS_ERR_EXIST;
lfs_file_open(&lfs, &file, "/", LFS_O_WRONLY | LFS_O_CREAT)
=> LFS_ERR_ISDIR;
lfs_remove(&lfs, "/") => LFS_ERR_INVAL;
lfs_unmount(&lfs) => 0;
'''
[[case]] # root representations
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_stat(&lfs, "/", &info) => 0;
assert(strcmp(info.name, "/") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_stat(&lfs, "", &info) => 0;
assert(strcmp(info.name, "/") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_stat(&lfs, ".", &info) => 0;
assert(strcmp(info.name, "/") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_stat(&lfs, "..", &info) => 0;
assert(strcmp(info.name, "/") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_stat(&lfs, "//", &info) => 0;
assert(strcmp(info.name, "/") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_stat(&lfs, "./", &info) => 0;
assert(strcmp(info.name, "/") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_unmount(&lfs) => 0;
'''
[[case]] # superblock conflict test
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_stat(&lfs, "littlefs", &info) => LFS_ERR_NOENT;
lfs_remove(&lfs, "littlefs") => LFS_ERR_NOENT;
lfs_mkdir(&lfs, "littlefs") => 0;
lfs_stat(&lfs, "littlefs", &info) => 0;
assert(strcmp(info.name, "littlefs") == 0);
assert(info.type == LFS_TYPE_DIR);
lfs_remove(&lfs, "littlefs") => 0;
lfs_stat(&lfs, "littlefs", &info) => LFS_ERR_NOENT;
lfs_unmount(&lfs) => 0;
'''
[[case]] # max path test
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "coffee") => 0;
lfs_mkdir(&lfs, "coffee/hotcoffee") => 0;
lfs_mkdir(&lfs, "coffee/warmcoffee") => 0;
lfs_mkdir(&lfs, "coffee/coldcoffee") => 0;
memset(path, 'w', LFS_NAME_MAX+1);
path[LFS_NAME_MAX+1] = '\0';
lfs_mkdir(&lfs, path) => LFS_ERR_NAMETOOLONG;
lfs_file_open(&lfs, &file, path, LFS_O_WRONLY | LFS_O_CREAT)
=> LFS_ERR_NAMETOOLONG;
memcpy(path, "coffee/", strlen("coffee/"));
memset(path+strlen("coffee/"), 'w', LFS_NAME_MAX+1);
path[strlen("coffee/")+LFS_NAME_MAX+1] = '\0';
lfs_mkdir(&lfs, path) => LFS_ERR_NAMETOOLONG;
lfs_file_open(&lfs, &file, path, LFS_O_WRONLY | LFS_O_CREAT)
=> LFS_ERR_NAMETOOLONG;
lfs_unmount(&lfs) => 0;
'''
[[case]] # really big path test
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_mkdir(&lfs, "coffee") => 0;
lfs_mkdir(&lfs, "coffee/hotcoffee") => 0;
lfs_mkdir(&lfs, "coffee/warmcoffee") => 0;
lfs_mkdir(&lfs, "coffee/coldcoffee") => 0;
memset(path, 'w', LFS_NAME_MAX);
path[LFS_NAME_MAX] = '\0';
lfs_mkdir(&lfs, path) => 0;
lfs_remove(&lfs, path) => 0;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_remove(&lfs, path) => 0;
memcpy(path, "coffee/", strlen("coffee/"));
memset(path+strlen("coffee/"), 'w', LFS_NAME_MAX);
path[strlen("coffee/")+LFS_NAME_MAX] = '\0';
lfs_mkdir(&lfs, path) => 0;
lfs_remove(&lfs, path) => 0;
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_remove(&lfs, path) => 0;
lfs_unmount(&lfs) => 0;
'''

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# specific corner cases worth explicitly testing for
[[case]] # dangling split dir test
define.ITERATIONS = 20
define.COUNT = 10
define.LFS_BLOCK_CYCLES = [8, 1]
code = '''
lfs_format(&lfs, &cfg) => 0;
// fill up filesystem so only ~16 blocks are left
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "padding", LFS_O_CREAT | LFS_O_WRONLY) => 0;
memset(buffer, 0, 512);
while (LFS_BLOCK_COUNT - lfs_fs_size(&lfs) > 16) {
lfs_file_write(&lfs, &file, buffer, 512) => 512;
}
lfs_file_close(&lfs, &file) => 0;
// make a child dir to use in bounded space
lfs_mkdir(&lfs, "child") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int j = 0; j < ITERATIONS; j++) {
for (int i = 0; i < COUNT; i++) {
sprintf(path, "child/test%03d_loooooooooooooooooong_name", i);
lfs_file_open(&lfs, &file, path, LFS_O_CREAT | LFS_O_WRONLY) => 0;
lfs_file_close(&lfs, &file) => 0;
}
lfs_dir_open(&lfs, &dir, "child") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
lfs_dir_read(&lfs, &dir, &info) => 1;
for (int i = 0; i < COUNT; i++) {
sprintf(path, "test%03d_loooooooooooooooooong_name", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
strcmp(info.name, path) => 0;
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
if (j == ITERATIONS-1) {
break;
}
for (int i = 0; i < COUNT; i++) {
sprintf(path, "child/test%03d_loooooooooooooooooong_name", i);
lfs_remove(&lfs, path) => 0;
}
}
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_dir_open(&lfs, &dir, "child") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
lfs_dir_read(&lfs, &dir, &info) => 1;
for (int i = 0; i < COUNT; i++) {
sprintf(path, "test%03d_loooooooooooooooooong_name", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
strcmp(info.name, path) => 0;
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
for (int i = 0; i < COUNT; i++) {
sprintf(path, "child/test%03d_loooooooooooooooooong_name", i);
lfs_remove(&lfs, path) => 0;
}
lfs_unmount(&lfs) => 0;
'''
[[case]] # outdated head test
define.ITERATIONS = 20
define.COUNT = 10
define.LFS_BLOCK_CYCLES = [8, 1]
code = '''
lfs_format(&lfs, &cfg) => 0;
// fill up filesystem so only ~16 blocks are left
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "padding", LFS_O_CREAT | LFS_O_WRONLY) => 0;
memset(buffer, 0, 512);
while (LFS_BLOCK_COUNT - lfs_fs_size(&lfs) > 16) {
lfs_file_write(&lfs, &file, buffer, 512) => 512;
}
lfs_file_close(&lfs, &file) => 0;
// make a child dir to use in bounded space
lfs_mkdir(&lfs, "child") => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int j = 0; j < ITERATIONS; j++) {
for (int i = 0; i < COUNT; i++) {
sprintf(path, "child/test%03d_loooooooooooooooooong_name", i);
lfs_file_open(&lfs, &file, path, LFS_O_CREAT | LFS_O_WRONLY) => 0;
lfs_file_close(&lfs, &file) => 0;
}
lfs_dir_open(&lfs, &dir, "child") => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
lfs_dir_read(&lfs, &dir, &info) => 1;
for (int i = 0; i < COUNT; i++) {
sprintf(path, "test%03d_loooooooooooooooooong_name", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
strcmp(info.name, path) => 0;
info.size => 0;
sprintf(path, "child/test%03d_loooooooooooooooooong_name", i);
lfs_file_open(&lfs, &file, path, LFS_O_WRONLY) => 0;
lfs_file_write(&lfs, &file, "hi", 2) => 2;
lfs_file_close(&lfs, &file) => 0;
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_rewind(&lfs, &dir) => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
lfs_dir_read(&lfs, &dir, &info) => 1;
for (int i = 0; i < COUNT; i++) {
sprintf(path, "test%03d_loooooooooooooooooong_name", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
strcmp(info.name, path) => 0;
info.size => 2;
sprintf(path, "child/test%03d_loooooooooooooooooong_name", i);
lfs_file_open(&lfs, &file, path, LFS_O_WRONLY) => 0;
lfs_file_write(&lfs, &file, "hi", 2) => 2;
lfs_file_close(&lfs, &file) => 0;
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_rewind(&lfs, &dir) => 0;
lfs_dir_read(&lfs, &dir, &info) => 1;
lfs_dir_read(&lfs, &dir, &info) => 1;
for (int i = 0; i < COUNT; i++) {
sprintf(path, "test%03d_loooooooooooooooooong_name", i);
lfs_dir_read(&lfs, &dir, &info) => 1;
strcmp(info.name, path) => 0;
info.size => 2;
}
lfs_dir_read(&lfs, &dir, &info) => 0;
lfs_dir_close(&lfs, &dir) => 0;
for (int i = 0; i < COUNT; i++) {
sprintf(path, "child/test%03d_loooooooooooooooooong_name", i);
lfs_remove(&lfs, path) => 0;
}
}
lfs_unmount(&lfs) => 0;
'''
[[case]] # reentrant testing for relocations, this is the same as the
# orphan testing, except here we also set block_cycles so that
# almost every tree operation needs a relocation
reentrant = true
# TODO fix this case, caused by non-DAG trees
if = '!(DEPTH == 3 && LFS_CACHE_SIZE != 64)'
define = [
{FILES=6, DEPTH=1, CYCLES=20, LFS_BLOCK_CYCLES=1},
{FILES=26, DEPTH=1, CYCLES=20, LFS_BLOCK_CYCLES=1},
{FILES=3, DEPTH=3, CYCLES=20, LFS_BLOCK_CYCLES=1},
]
code = '''
err = lfs_mount(&lfs, &cfg);
if (err) {
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
}
srand(1);
const char alpha[] = "abcdefghijklmnopqrstuvwxyz";
for (int i = 0; i < CYCLES; i++) {
// create random path
char full_path[256];
for (int d = 0; d < DEPTH; d++) {
sprintf(&full_path[2*d], "/%c", alpha[rand() % FILES]);
}
// if it does not exist, we create it, else we destroy
int res = lfs_stat(&lfs, full_path, &info);
if (res == LFS_ERR_NOENT) {
// create each directory in turn, ignore if dir already exists
for (int d = 0; d < DEPTH; d++) {
strcpy(path, full_path);
path[2*d+2] = '\0';
err = lfs_mkdir(&lfs, path);
assert(!err || err == LFS_ERR_EXIST);
}
for (int d = 0; d < DEPTH; d++) {
strcpy(path, full_path);
path[2*d+2] = '\0';
lfs_stat(&lfs, path, &info) => 0;
assert(strcmp(info.name, &path[2*d+1]) == 0);
assert(info.type == LFS_TYPE_DIR);
}
} else {
// is valid dir?
assert(strcmp(info.name, &full_path[2*(DEPTH-1)+1]) == 0);
assert(info.type == LFS_TYPE_DIR);
// try to delete path in reverse order, ignore if dir is not empty
for (int d = DEPTH-1; d >= 0; d--) {
strcpy(path, full_path);
path[2*d+2] = '\0';
err = lfs_remove(&lfs, path);
assert(!err || err == LFS_ERR_NOTEMPTY);
}
lfs_stat(&lfs, full_path, &info) => LFS_ERR_NOENT;
}
}
lfs_unmount(&lfs) => 0;
'''
[[case]] # reentrant testing for relocations, but now with random renames!
reentrant = true
# TODO fix this case, caused by non-DAG trees
if = '!(DEPTH == 3 && LFS_CACHE_SIZE != 64)'
define = [
{FILES=6, DEPTH=1, CYCLES=20, LFS_BLOCK_CYCLES=1},
{FILES=26, DEPTH=1, CYCLES=20, LFS_BLOCK_CYCLES=1},
{FILES=3, DEPTH=3, CYCLES=20, LFS_BLOCK_CYCLES=1},
]
code = '''
err = lfs_mount(&lfs, &cfg);
if (err) {
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
}
srand(1);
const char alpha[] = "abcdefghijklmnopqrstuvwxyz";
for (int i = 0; i < CYCLES; i++) {
// create random path
char full_path[256];
for (int d = 0; d < DEPTH; d++) {
sprintf(&full_path[2*d], "/%c", alpha[rand() % FILES]);
}
// if it does not exist, we create it, else we destroy
int res = lfs_stat(&lfs, full_path, &info);
assert(!res || res == LFS_ERR_NOENT);
if (res == LFS_ERR_NOENT) {
// create each directory in turn, ignore if dir already exists
for (int d = 0; d < DEPTH; d++) {
strcpy(path, full_path);
path[2*d+2] = '\0';
err = lfs_mkdir(&lfs, path);
assert(!err || err == LFS_ERR_EXIST);
}
for (int d = 0; d < DEPTH; d++) {
strcpy(path, full_path);
path[2*d+2] = '\0';
lfs_stat(&lfs, path, &info) => 0;
assert(strcmp(info.name, &path[2*d+1]) == 0);
assert(info.type == LFS_TYPE_DIR);
}
} else {
assert(strcmp(info.name, &full_path[2*(DEPTH-1)+1]) == 0);
assert(info.type == LFS_TYPE_DIR);
// create new random path
char new_path[256];
for (int d = 0; d < DEPTH; d++) {
sprintf(&new_path[2*d], "/%c", alpha[rand() % FILES]);
}
// if new path does not exist, rename, otherwise destroy
res = lfs_stat(&lfs, new_path, &info);
assert(!res || res == LFS_ERR_NOENT);
if (res == LFS_ERR_NOENT) {
// stop once some dir is renamed
for (int d = 0; d < DEPTH; d++) {
strcpy(&path[2*d], &full_path[2*d]);
path[2*d+2] = '\0';
strcpy(&path[128+2*d], &new_path[2*d]);
path[128+2*d+2] = '\0';
err = lfs_rename(&lfs, path, path+128);
assert(!err || err == LFS_ERR_NOTEMPTY);
if (!err) {
strcpy(path, path+128);
}
}
for (int d = 0; d < DEPTH; d++) {
strcpy(path, new_path);
path[2*d+2] = '\0';
lfs_stat(&lfs, path, &info) => 0;
assert(strcmp(info.name, &path[2*d+1]) == 0);
assert(info.type == LFS_TYPE_DIR);
}
lfs_stat(&lfs, full_path, &info) => LFS_ERR_NOENT;
} else {
// try to delete path in reverse order,
// ignore if dir is not empty
for (int d = DEPTH-1; d >= 0; d--) {
strcpy(path, full_path);
path[2*d+2] = '\0';
err = lfs_remove(&lfs, path);
assert(!err || err == LFS_ERR_NOTEMPTY);
}
lfs_stat(&lfs, full_path, &info) => LFS_ERR_NOENT;
}
}
}
lfs_unmount(&lfs) => 0;
'''

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[[case]] # simple file seek
define = [
{COUNT=132, SKIP=4},
{COUNT=132, SKIP=128},
{COUNT=200, SKIP=10},
{COUNT=200, SKIP=100},
{COUNT=4, SKIP=1},
{COUNT=4, SKIP=2},
]
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "kitty",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
size = strlen("kittycatcat");
memcpy(buffer, "kittycatcat", size);
for (int j = 0; j < COUNT; j++) {
lfs_file_write(&lfs, &file, buffer, size);
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "kitty", LFS_O_RDONLY) => 0;
lfs_soff_t pos = -1;
size = strlen("kittycatcat");
for (int i = 0; i < SKIP; i++) {
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "kittycatcat", size) => 0;
pos = lfs_file_tell(&lfs, &file);
}
assert(pos >= 0);
lfs_file_seek(&lfs, &file, pos, LFS_SEEK_SET) => pos;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "kittycatcat", size) => 0;
lfs_file_rewind(&lfs, &file) => 0;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "kittycatcat", size) => 0;
lfs_file_seek(&lfs, &file, 0, LFS_SEEK_CUR) => size;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "kittycatcat", size) => 0;
lfs_file_seek(&lfs, &file, size, LFS_SEEK_CUR) => 3*size;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "kittycatcat", size) => 0;
lfs_file_seek(&lfs, &file, pos, LFS_SEEK_SET) => pos;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "kittycatcat", size) => 0;
lfs_file_seek(&lfs, &file, -size, LFS_SEEK_CUR) => pos;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "kittycatcat", size) => 0;
lfs_file_seek(&lfs, &file, -size, LFS_SEEK_END) >= 0 => 1;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "kittycatcat", size) => 0;
size = lfs_file_size(&lfs, &file);
lfs_file_seek(&lfs, &file, 0, LFS_SEEK_CUR) => size;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # simple file seek and write
define = [
{COUNT=132, SKIP=4},
{COUNT=132, SKIP=128},
{COUNT=200, SKIP=10},
{COUNT=200, SKIP=100},
{COUNT=4, SKIP=1},
{COUNT=4, SKIP=2},
]
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "kitty",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
size = strlen("kittycatcat");
memcpy(buffer, "kittycatcat", size);
for (int j = 0; j < COUNT; j++) {
lfs_file_write(&lfs, &file, buffer, size);
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "kitty", LFS_O_RDWR) => 0;
lfs_soff_t pos = -1;
size = strlen("kittycatcat");
for (int i = 0; i < SKIP; i++) {
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "kittycatcat", size) => 0;
pos = lfs_file_tell(&lfs, &file);
}
assert(pos >= 0);
memcpy(buffer, "doggodogdog", size);
lfs_file_seek(&lfs, &file, pos, LFS_SEEK_SET) => pos;
lfs_file_write(&lfs, &file, buffer, size) => size;
lfs_file_seek(&lfs, &file, pos, LFS_SEEK_SET) => pos;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "doggodogdog", size) => 0;
lfs_file_rewind(&lfs, &file) => 0;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "kittycatcat", size) => 0;
lfs_file_seek(&lfs, &file, pos, LFS_SEEK_SET) => pos;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "doggodogdog", size) => 0;
lfs_file_seek(&lfs, &file, -size, LFS_SEEK_END) >= 0 => 1;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "kittycatcat", size) => 0;
size = lfs_file_size(&lfs, &file);
lfs_file_seek(&lfs, &file, 0, LFS_SEEK_CUR) => size;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # boundary seek and writes
define.COUNT = 132
define.OFFSETS = '"{512, 1020, 513, 1021, 511, 1019, 1441}"'
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "kitty",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
size = strlen("kittycatcat");
memcpy(buffer, "kittycatcat", size);
for (int j = 0; j < COUNT; j++) {
lfs_file_write(&lfs, &file, buffer, size);
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "kitty", LFS_O_RDWR) => 0;
size = strlen("hedgehoghog");
const lfs_soff_t offsets[] = OFFSETS;
for (unsigned i = 0; i < sizeof(offsets) / sizeof(offsets[0]); i++) {
lfs_soff_t off = offsets[i];
memcpy(buffer, "hedgehoghog", size);
lfs_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
lfs_file_write(&lfs, &file, buffer, size) => size;
lfs_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "hedgehoghog", size) => 0;
lfs_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "kittycatcat", size) => 0;
lfs_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "hedgehoghog", size) => 0;
lfs_file_sync(&lfs, &file) => 0;
lfs_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "kittycatcat", size) => 0;
lfs_file_seek(&lfs, &file, off, LFS_SEEK_SET) => off;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "hedgehoghog", size) => 0;
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # out of bounds seek
define = [
{COUNT=132, SKIP=4},
{COUNT=132, SKIP=128},
{COUNT=200, SKIP=10},
{COUNT=200, SKIP=100},
{COUNT=4, SKIP=2},
{COUNT=4, SKIP=3},
]
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "kitty",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND) => 0;
size = strlen("kittycatcat");
memcpy(buffer, "kittycatcat", size);
for (int j = 0; j < COUNT; j++) {
lfs_file_write(&lfs, &file, buffer, size);
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "kitty", LFS_O_RDWR) => 0;
size = strlen("kittycatcat");
lfs_file_size(&lfs, &file) => COUNT*size;
lfs_file_seek(&lfs, &file, (COUNT+SKIP)*size,
LFS_SEEK_SET) => (COUNT+SKIP)*size;
lfs_file_read(&lfs, &file, buffer, size) => 0;
memcpy(buffer, "porcupineee", size);
lfs_file_write(&lfs, &file, buffer, size) => size;
lfs_file_seek(&lfs, &file, (COUNT+SKIP)*size,
LFS_SEEK_SET) => (COUNT+SKIP)*size;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "porcupineee", size) => 0;
lfs_file_seek(&lfs, &file, COUNT*size,
LFS_SEEK_SET) => COUNT*size;
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "\0\0\0\0\0\0\0\0\0\0\0", size) => 0;
lfs_file_seek(&lfs, &file, -((COUNT+SKIP)*size),
LFS_SEEK_CUR) => LFS_ERR_INVAL;
lfs_file_tell(&lfs, &file) => (COUNT+1)*size;
lfs_file_seek(&lfs, &file, -((COUNT+2*SKIP)*size),
LFS_SEEK_END) => LFS_ERR_INVAL;
lfs_file_tell(&lfs, &file) => (COUNT+1)*size;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # inline write and seek
define.SIZE = [2, 4, 128, 132]
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "tinykitty",
LFS_O_RDWR | LFS_O_CREAT) => 0;
int j = 0;
int k = 0;
memcpy(buffer, "abcdefghijklmnopqrstuvwxyz", 26);
for (unsigned i = 0; i < SIZE; i++) {
lfs_file_write(&lfs, &file, &buffer[j++ % 26], 1) => 1;
lfs_file_tell(&lfs, &file) => i+1;
lfs_file_size(&lfs, &file) => i+1;
}
lfs_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
lfs_file_tell(&lfs, &file) => 0;
lfs_file_size(&lfs, &file) => SIZE;
for (unsigned i = 0; i < SIZE; i++) {
uint8_t c;
lfs_file_read(&lfs, &file, &c, 1) => 1;
c => buffer[k++ % 26];
}
lfs_file_sync(&lfs, &file) => 0;
lfs_file_tell(&lfs, &file) => SIZE;
lfs_file_size(&lfs, &file) => SIZE;
lfs_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
for (unsigned i = 0; i < SIZE; i++) {
lfs_file_write(&lfs, &file, &buffer[j++ % 26], 1) => 1;
lfs_file_tell(&lfs, &file) => i+1;
lfs_file_size(&lfs, &file) => SIZE;
lfs_file_sync(&lfs, &file) => 0;
lfs_file_tell(&lfs, &file) => i+1;
lfs_file_size(&lfs, &file) => SIZE;
if (i < SIZE-2) {
uint8_t c[3];
lfs_file_seek(&lfs, &file, -1, LFS_SEEK_CUR) => i;
lfs_file_read(&lfs, &file, &c, 3) => 3;
lfs_file_tell(&lfs, &file) => i+3;
lfs_file_size(&lfs, &file) => SIZE;
lfs_file_seek(&lfs, &file, i+1, LFS_SEEK_SET) => i+1;
lfs_file_tell(&lfs, &file) => i+1;
lfs_file_size(&lfs, &file) => SIZE;
}
}
lfs_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
lfs_file_tell(&lfs, &file) => 0;
lfs_file_size(&lfs, &file) => SIZE;
for (unsigned i = 0; i < SIZE; i++) {
uint8_t c;
lfs_file_read(&lfs, &file, &c, 1) => 1;
c => buffer[k++ % 26];
}
lfs_file_sync(&lfs, &file) => 0;
lfs_file_tell(&lfs, &file) => SIZE;
lfs_file_size(&lfs, &file) => SIZE;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # file seek and write with power-loss
# must be power-of-2 for quadratic probing to be exhaustive
define.COUNT = [4, 64, 128]
reentrant = true
code = '''
err = lfs_mount(&lfs, &cfg);
if (err) {
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
}
err = lfs_file_open(&lfs, &file, "kitty", LFS_O_RDONLY);
assert(!err || err == LFS_ERR_NOENT);
if (!err) {
if (lfs_file_size(&lfs, &file) != 0) {
lfs_file_size(&lfs, &file) => 11*COUNT;
for (int j = 0; j < COUNT; j++) {
memset(buffer, 0, 11+1);
lfs_file_read(&lfs, &file, buffer, 11) => 11;
assert(memcmp(buffer, "kittycatcat", 11) == 0 ||
memcmp(buffer, "doggodogdog", 11) == 0);
}
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_file_open(&lfs, &file, "kitty", LFS_O_WRONLY | LFS_O_CREAT) => 0;
if (lfs_file_size(&lfs, &file) == 0) {
for (int j = 0; j < COUNT; j++) {
strcpy((char*)buffer, "kittycatcat");
size = strlen((char*)buffer);
lfs_file_write(&lfs, &file, buffer, size) => size;
}
}
lfs_file_close(&lfs, &file) => 0;
strcpy((char*)buffer, "doggodogdog");
size = strlen((char*)buffer);
lfs_file_open(&lfs, &file, "kitty", LFS_O_RDWR) => 0;
lfs_file_size(&lfs, &file) => COUNT*size;
// seek and write using quadratic probing to touch all
// 11-byte words in the file
lfs_off_t off = 0;
for (int j = 0; j < COUNT; j++) {
off = (5*off + 1) % COUNT;
lfs_file_seek(&lfs, &file, off*size, LFS_SEEK_SET) => off*size;
lfs_file_read(&lfs, &file, buffer, size) => size;
assert(memcmp(buffer, "kittycatcat", size) == 0 ||
memcmp(buffer, "doggodogdog", size) == 0);
if (memcmp(buffer, "doggodogdog", size) != 0) {
lfs_file_seek(&lfs, &file, off*size, LFS_SEEK_SET) => off*size;
strcpy((char*)buffer, "doggodogdog");
lfs_file_write(&lfs, &file, buffer, size) => size;
lfs_file_seek(&lfs, &file, off*size, LFS_SEEK_SET) => off*size;
lfs_file_read(&lfs, &file, buffer, size) => size;
assert(memcmp(buffer, "doggodogdog", size) == 0);
lfs_file_sync(&lfs, &file) => 0;
lfs_file_seek(&lfs, &file, off*size, LFS_SEEK_SET) => off*size;
lfs_file_read(&lfs, &file, buffer, size) => size;
assert(memcmp(buffer, "doggodogdog", size) == 0);
}
}
lfs_file_close(&lfs, &file) => 0;
lfs_file_open(&lfs, &file, "kitty", LFS_O_RDWR) => 0;
lfs_file_size(&lfs, &file) => COUNT*size;
for (int j = 0; j < COUNT; j++) {
lfs_file_read(&lfs, &file, buffer, size) => size;
assert(memcmp(buffer, "doggodogdog", size) == 0);
}
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''

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[[case]] # simple formatting test
code = '''
lfs_format(&lfs, &cfg) => 0;
'''
[[case]] # mount/unmount
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # reentrant format
reentrant = true
code = '''
err = lfs_mount(&lfs, &cfg);
if (err) {
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
}
lfs_unmount(&lfs) => 0;
'''
[[case]] # invalid mount
code = '''
lfs_mount(&lfs, &cfg) => LFS_ERR_CORRUPT;
'''
[[case]] # expanding superblock
define.LFS_BLOCK_CYCLES = [32, 33, 1]
define.N = [10, 100, 1000]
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (int i = 0; i < N; i++) {
lfs_file_open(&lfs, &file, "dummy",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_stat(&lfs, "dummy", &info) => 0;
assert(strcmp(info.name, "dummy") == 0);
assert(info.type == LFS_TYPE_REG);
lfs_remove(&lfs, "dummy") => 0;
}
lfs_unmount(&lfs) => 0;
// one last check after power-cycle
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "dummy",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_stat(&lfs, "dummy", &info) => 0;
assert(strcmp(info.name, "dummy") == 0);
assert(info.type == LFS_TYPE_REG);
lfs_unmount(&lfs) => 0;
'''
[[case]] # expanding superblock with power cycle
define.LFS_BLOCK_CYCLES = [32, 33, 1]
define.N = [10, 100, 1000]
code = '''
lfs_format(&lfs, &cfg) => 0;
for (int i = 0; i < N; i++) {
lfs_mount(&lfs, &cfg) => 0;
// remove lingering dummy?
err = lfs_stat(&lfs, "dummy", &info);
assert(err == 0 || (err == LFS_ERR_NOENT && i == 0));
if (!err) {
assert(strcmp(info.name, "dummy") == 0);
assert(info.type == LFS_TYPE_REG);
lfs_remove(&lfs, "dummy") => 0;
}
lfs_file_open(&lfs, &file, "dummy",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_stat(&lfs, "dummy", &info) => 0;
assert(strcmp(info.name, "dummy") == 0);
assert(info.type == LFS_TYPE_REG);
lfs_unmount(&lfs) => 0;
}
// one last check after power-cycle
lfs_mount(&lfs, &cfg) => 0;
lfs_stat(&lfs, "dummy", &info) => 0;
assert(strcmp(info.name, "dummy") == 0);
assert(info.type == LFS_TYPE_REG);
lfs_unmount(&lfs) => 0;
'''
[[case]] # reentrant expanding superblock
define.LFS_BLOCK_CYCLES = [2, 1]
define.N = 24
reentrant = true
code = '''
err = lfs_mount(&lfs, &cfg);
if (err) {
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
}
for (int i = 0; i < N; i++) {
// remove lingering dummy?
err = lfs_stat(&lfs, "dummy", &info);
assert(err == 0 || (err == LFS_ERR_NOENT && i == 0));
if (!err) {
assert(strcmp(info.name, "dummy") == 0);
assert(info.type == LFS_TYPE_REG);
lfs_remove(&lfs, "dummy") => 0;
}
lfs_file_open(&lfs, &file, "dummy",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_EXCL) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_stat(&lfs, "dummy", &info) => 0;
assert(strcmp(info.name, "dummy") == 0);
assert(info.type == LFS_TYPE_REG);
}
lfs_unmount(&lfs) => 0;
// one last check after power-cycle
lfs_mount(&lfs, &cfg) => 0;
lfs_stat(&lfs, "dummy", &info) => 0;
assert(strcmp(info.name, "dummy") == 0);
assert(info.type == LFS_TYPE_REG);
lfs_unmount(&lfs) => 0;
'''

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[[case]] # simple truncate
define.MEDIUMSIZE = [32, 2048]
define.LARGESIZE = 8192
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "baldynoop",
LFS_O_WRONLY | LFS_O_CREAT) => 0;
strcpy((char*)buffer, "hair");
size = strlen((char*)buffer);
for (lfs_off_t j = 0; j < LARGESIZE; j += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_size(&lfs, &file) => LARGESIZE;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "baldynoop", LFS_O_RDWR) => 0;
lfs_file_size(&lfs, &file) => LARGESIZE;
lfs_file_truncate(&lfs, &file, MEDIUMSIZE) => 0;
lfs_file_size(&lfs, &file) => MEDIUMSIZE;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "baldynoop", LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => MEDIUMSIZE;
size = strlen("hair");
for (lfs_off_t j = 0; j < MEDIUMSIZE; j += size) {
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "hair", size) => 0;
}
lfs_file_read(&lfs, &file, buffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # truncate and read
define.MEDIUMSIZE = [32, 2048]
define.LARGESIZE = 8192
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "baldyread",
LFS_O_WRONLY | LFS_O_CREAT) => 0;
strcpy((char*)buffer, "hair");
size = strlen((char*)buffer);
for (lfs_off_t j = 0; j < LARGESIZE; j += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_size(&lfs, &file) => LARGESIZE;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "baldyread", LFS_O_RDWR) => 0;
lfs_file_size(&lfs, &file) => LARGESIZE;
lfs_file_truncate(&lfs, &file, MEDIUMSIZE) => 0;
lfs_file_size(&lfs, &file) => MEDIUMSIZE;
size = strlen("hair");
for (lfs_off_t j = 0; j < MEDIUMSIZE; j += size) {
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "hair", size) => 0;
}
lfs_file_read(&lfs, &file, buffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "baldyread", LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => MEDIUMSIZE;
size = strlen("hair");
for (lfs_off_t j = 0; j < MEDIUMSIZE; j += size) {
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "hair", size) => 0;
}
lfs_file_read(&lfs, &file, buffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # write, truncate, and read
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "sequence",
LFS_O_RDWR | LFS_O_CREAT | LFS_O_TRUNC) => 0;
size = lfs_min(lfs.cfg->cache_size, sizeof(buffer)/2);
lfs_size_t qsize = size / 4;
uint8_t *wb = buffer;
uint8_t *rb = buffer + size;
for (lfs_off_t j = 0; j < size; ++j) {
wb[j] = j;
}
/* Spread sequence over size */
lfs_file_write(&lfs, &file, wb, size) => size;
lfs_file_size(&lfs, &file) => size;
lfs_file_tell(&lfs, &file) => size;
lfs_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
lfs_file_tell(&lfs, &file) => 0;
/* Chop off the last quarter */
lfs_size_t trunc = size - qsize;
lfs_file_truncate(&lfs, &file, trunc) => 0;
lfs_file_tell(&lfs, &file) => 0;
lfs_file_size(&lfs, &file) => trunc;
/* Read should produce first 3/4 */
lfs_file_read(&lfs, &file, rb, size) => trunc;
memcmp(rb, wb, trunc) => 0;
/* Move to 1/4 */
lfs_file_size(&lfs, &file) => trunc;
lfs_file_seek(&lfs, &file, qsize, LFS_SEEK_SET) => qsize;
lfs_file_tell(&lfs, &file) => qsize;
/* Chop to 1/2 */
trunc -= qsize;
lfs_file_truncate(&lfs, &file, trunc) => 0;
lfs_file_tell(&lfs, &file) => qsize;
lfs_file_size(&lfs, &file) => trunc;
/* Read should produce second quarter */
lfs_file_read(&lfs, &file, rb, size) => trunc - qsize;
memcmp(rb, wb + qsize, trunc - qsize) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # truncate and write
define.MEDIUMSIZE = [32, 2048]
define.LARGESIZE = 8192
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "baldywrite",
LFS_O_WRONLY | LFS_O_CREAT) => 0;
strcpy((char*)buffer, "hair");
size = strlen((char*)buffer);
for (lfs_off_t j = 0; j < LARGESIZE; j += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_size(&lfs, &file) => LARGESIZE;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "baldywrite", LFS_O_RDWR) => 0;
lfs_file_size(&lfs, &file) => LARGESIZE;
lfs_file_truncate(&lfs, &file, MEDIUMSIZE) => 0;
lfs_file_size(&lfs, &file) => MEDIUMSIZE;
strcpy((char*)buffer, "bald");
size = strlen((char*)buffer);
for (lfs_off_t j = 0; j < MEDIUMSIZE; j += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_size(&lfs, &file) => MEDIUMSIZE;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "baldywrite", LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => MEDIUMSIZE;
size = strlen("bald");
for (lfs_off_t j = 0; j < MEDIUMSIZE; j += size) {
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "bald", size) => 0;
}
lfs_file_read(&lfs, &file, buffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # truncate write under powerloss
define.SMALLSIZE = [4, 512]
define.MEDIUMSIZE = [32, 1024]
define.LARGESIZE = 2048
reentrant = true
code = '''
err = lfs_mount(&lfs, &cfg);
if (err) {
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
}
err = lfs_file_open(&lfs, &file, "baldy", LFS_O_RDONLY);
assert(!err || err == LFS_ERR_NOENT);
if (!err) {
size = lfs_file_size(&lfs, &file);
assert(size == 0 ||
size == LARGESIZE ||
size == MEDIUMSIZE ||
size == SMALLSIZE);
for (lfs_off_t j = 0; j < size; j += 4) {
lfs_file_read(&lfs, &file, buffer, 4) => 4;
assert(memcmp(buffer, "hair", 4) == 0 ||
memcmp(buffer, "bald", 4) == 0 ||
memcmp(buffer, "comb", 4) == 0);
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_file_open(&lfs, &file, "baldy",
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
lfs_file_size(&lfs, &file) => 0;
strcpy((char*)buffer, "hair");
size = strlen((char*)buffer);
for (lfs_off_t j = 0; j < LARGESIZE; j += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_size(&lfs, &file) => LARGESIZE;
lfs_file_close(&lfs, &file) => 0;
lfs_file_open(&lfs, &file, "baldy", LFS_O_RDWR) => 0;
lfs_file_size(&lfs, &file) => LARGESIZE;
lfs_file_truncate(&lfs, &file, MEDIUMSIZE) => 0;
lfs_file_size(&lfs, &file) => MEDIUMSIZE;
strcpy((char*)buffer, "bald");
size = strlen((char*)buffer);
for (lfs_off_t j = 0; j < MEDIUMSIZE; j += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_size(&lfs, &file) => MEDIUMSIZE;
lfs_file_close(&lfs, &file) => 0;
lfs_file_open(&lfs, &file, "baldy", LFS_O_RDWR) => 0;
lfs_file_size(&lfs, &file) => MEDIUMSIZE;
lfs_file_truncate(&lfs, &file, SMALLSIZE) => 0;
lfs_file_size(&lfs, &file) => SMALLSIZE;
strcpy((char*)buffer, "comb");
size = strlen((char*)buffer);
for (lfs_off_t j = 0; j < SMALLSIZE; j += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_size(&lfs, &file) => SMALLSIZE;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''
[[case]] # more aggressive general truncation tests
define.CONFIG = 'range(6)'
define.SMALLSIZE = 32
define.MEDIUMSIZE = 2048
define.LARGESIZE = 8192
code = '''
#define COUNT 5
const struct {
lfs_off_t startsizes[COUNT];
lfs_off_t startseeks[COUNT];
lfs_off_t hotsizes[COUNT];
lfs_off_t coldsizes[COUNT];
} configs[] = {
// cold shrinking
{{2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE},
{2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE},
{2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE},
{ 0, SMALLSIZE, MEDIUMSIZE, LARGESIZE, 2*LARGESIZE}},
// cold expanding
{{2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE},
{2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE},
{2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE},
{ 0, SMALLSIZE, MEDIUMSIZE, LARGESIZE, 2*LARGESIZE}},
// warm shrinking truncate
{{2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE},
{2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE},
{ 0, SMALLSIZE, MEDIUMSIZE, LARGESIZE, 2*LARGESIZE},
{ 0, 0, 0, 0, 0}},
// warm expanding truncate
{{ 0, SMALLSIZE, MEDIUMSIZE, LARGESIZE, 2*LARGESIZE},
{ 0, SMALLSIZE, MEDIUMSIZE, LARGESIZE, 2*LARGESIZE},
{2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE},
{2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE}},
// mid-file shrinking truncate
{{2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE},
{ LARGESIZE, LARGESIZE, LARGESIZE, LARGESIZE, LARGESIZE},
{ 0, SMALLSIZE, MEDIUMSIZE, LARGESIZE, 2*LARGESIZE},
{ 0, 0, 0, 0, 0}},
// mid-file expanding truncate
{{ 0, SMALLSIZE, MEDIUMSIZE, LARGESIZE, 2*LARGESIZE},
{ 0, 0, SMALLSIZE, MEDIUMSIZE, LARGESIZE},
{2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE},
{2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE, 2*LARGESIZE}},
};
const lfs_off_t *startsizes = configs[CONFIG].startsizes;
const lfs_off_t *startseeks = configs[CONFIG].startseeks;
const lfs_off_t *hotsizes = configs[CONFIG].hotsizes;
const lfs_off_t *coldsizes = configs[CONFIG].coldsizes;
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (unsigned i = 0; i < COUNT; i++) {
sprintf(path, "hairyhead%d", i);
lfs_file_open(&lfs, &file, path,
LFS_O_WRONLY | LFS_O_CREAT | LFS_O_TRUNC) => 0;
strcpy((char*)buffer, "hair");
size = strlen((char*)buffer);
for (lfs_off_t j = 0; j < startsizes[i]; j += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
}
lfs_file_size(&lfs, &file) => startsizes[i];
if (startseeks[i] != startsizes[i]) {
lfs_file_seek(&lfs, &file,
startseeks[i], LFS_SEEK_SET) => startseeks[i];
}
lfs_file_truncate(&lfs, &file, hotsizes[i]) => 0;
lfs_file_size(&lfs, &file) => hotsizes[i];
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (unsigned i = 0; i < COUNT; i++) {
sprintf(path, "hairyhead%d", i);
lfs_file_open(&lfs, &file, path, LFS_O_RDWR) => 0;
lfs_file_size(&lfs, &file) => hotsizes[i];
size = strlen("hair");
lfs_off_t j = 0;
for (; j < startsizes[i] && j < hotsizes[i]; j += size) {
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "hair", size) => 0;
}
for (; j < hotsizes[i]; j += size) {
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "\0\0\0\0", size) => 0;
}
lfs_file_truncate(&lfs, &file, coldsizes[i]) => 0;
lfs_file_size(&lfs, &file) => coldsizes[i];
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
lfs_mount(&lfs, &cfg) => 0;
for (unsigned i = 0; i < COUNT; i++) {
sprintf(path, "hairyhead%d", i);
lfs_file_open(&lfs, &file, path, LFS_O_RDONLY) => 0;
lfs_file_size(&lfs, &file) => coldsizes[i];
size = strlen("hair");
lfs_off_t j = 0;
for (; j < startsizes[i] && j < hotsizes[i] && j < coldsizes[i];
j += size) {
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "hair", size) => 0;
}
for (; j < coldsizes[i]; j += size) {
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "\0\0\0\0", size) => 0;
}
lfs_file_close(&lfs, &file) => 0;
}
lfs_unmount(&lfs) => 0;
'''
[[case]] # noop truncate
define.MEDIUMSIZE = [32, 2048]
code = '''
lfs_format(&lfs, &cfg) => 0;
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "baldynoop",
LFS_O_RDWR | LFS_O_CREAT) => 0;
strcpy((char*)buffer, "hair");
size = strlen((char*)buffer);
for (lfs_off_t j = 0; j < MEDIUMSIZE; j += size) {
lfs_file_write(&lfs, &file, buffer, size) => size;
// this truncate should do nothing
lfs_file_truncate(&lfs, &file, j+size) => 0;
}
lfs_file_size(&lfs, &file) => MEDIUMSIZE;
lfs_file_seek(&lfs, &file, 0, LFS_SEEK_SET) => 0;
// should do nothing again
lfs_file_truncate(&lfs, &file, MEDIUMSIZE) => 0;
lfs_file_size(&lfs, &file) => MEDIUMSIZE;
for (lfs_off_t j = 0; j < MEDIUMSIZE; j += size) {
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "hair", size) => 0;
}
lfs_file_read(&lfs, &file, buffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
// still there after reboot?
lfs_mount(&lfs, &cfg) => 0;
lfs_file_open(&lfs, &file, "baldynoop", LFS_O_RDWR) => 0;
lfs_file_size(&lfs, &file) => MEDIUMSIZE;
for (lfs_off_t j = 0; j < MEDIUMSIZE; j += size) {
lfs_file_read(&lfs, &file, buffer, size) => size;
memcmp(buffer, "hair", size) => 0;
}
lfs_file_read(&lfs, &file, buffer, size) => 0;
lfs_file_close(&lfs, &file) => 0;
lfs_unmount(&lfs) => 0;
'''