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https://github.com/Fishwaldo/linux-bl808.git
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49f2cba3e5
Sometimes program section names don't match with libbpf's expectation. In particular XDP's default section names differ between libbpf and iproute2. Allow users to pass program type on command line. Name the types like the libbpf expected section names. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
178 lines
5.2 KiB
ReStructuredText
178 lines
5.2 KiB
ReStructuredText
================
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bpftool-prog
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================
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-------------------------------------------------------------------------------
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tool for inspection and simple manipulation of eBPF progs
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-------------------------------------------------------------------------------
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:Manual section: 8
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SYNOPSIS
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========
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**bpftool** [*OPTIONS*] **prog** *COMMAND*
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*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-f** | **--bpffs** } }
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*COMMANDS* :=
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{ **show** | **list** | **dump xlated** | **dump jited** | **pin** | **load** | **help** }
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MAP COMMANDS
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=============
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| **bpftool** **prog { show | list }** [*PROG*]
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| **bpftool** **prog dump xlated** *PROG* [{**file** *FILE* | **opcodes** | **visual**}]
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| **bpftool** **prog dump jited** *PROG* [{**file** *FILE* | **opcodes**}]
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| **bpftool** **prog pin** *PROG* *FILE*
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| **bpftool** **prog load** *OBJ* *FILE* [**type** *TYPE*] [**dev** *NAME*]
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| **bpftool** **prog help**
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| *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* }
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| *TYPE* := {
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| **socket** | **kprobe** | **kretprobe** | **classifier** | **action** |
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| **tracepoint** | **raw_tracepoint** | **xdp** | **perf_event** | **cgroup/skb** |
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| **cgroup/sock** | **cgroup/dev** | **lwt_in** | **lwt_out** | **lwt_xmit** |
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| **lwt_seg6local** | **sockops** | **sk_skb** | **sk_msg** | **lirc_mode2** |
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| **cgroup/bind4** | **cgroup/bind6** | **cgroup/post_bind4** | **cgroup/post_bind6** |
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| **cgroup/connect4** | **cgroup/connect6** | **cgroup/sendmsg4** | **cgroup/sendmsg6**
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| }
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DESCRIPTION
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===========
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**bpftool prog { show | list }** [*PROG*]
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Show information about loaded programs. If *PROG* is
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specified show information only about given program, otherwise
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list all programs currently loaded on the system.
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Output will start with program ID followed by program type and
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zero or more named attributes (depending on kernel version).
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**bpftool prog dump xlated** *PROG* [{ **file** *FILE* | **opcodes** | **visual** }]
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Dump eBPF instructions of the program from the kernel. By
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default, eBPF will be disassembled and printed to standard
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output in human-readable format. In this case, **opcodes**
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controls if raw opcodes should be printed as well.
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If **file** is specified, the binary image will instead be
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written to *FILE*.
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If **visual** is specified, control flow graph (CFG) will be
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built instead, and eBPF instructions will be presented with
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CFG in DOT format, on standard output.
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**bpftool prog dump jited** *PROG* [{ **file** *FILE* | **opcodes** }]
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Dump jited image (host machine code) of the program.
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If *FILE* is specified image will be written to a file,
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otherwise it will be disassembled and printed to stdout.
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**opcodes** controls if raw opcodes will be printed.
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**bpftool prog pin** *PROG* *FILE*
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Pin program *PROG* as *FILE*.
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Note: *FILE* must be located in *bpffs* mount.
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**bpftool prog load** *OBJ* *FILE* [**type** *TYPE*] [**dev** *NAME*]
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Load bpf program from binary *OBJ* and pin as *FILE*.
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**type** is optional, if not specified program type will be
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inferred from section names.
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If **dev** *NAME* is specified program will be loaded onto
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given networking device (offload).
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Note: *FILE* must be located in *bpffs* mount.
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**bpftool prog help**
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Print short help message.
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OPTIONS
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=======
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-h, --help
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Print short generic help message (similar to **bpftool help**).
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-v, --version
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Print version number (similar to **bpftool version**).
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-j, --json
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Generate JSON output. For commands that cannot produce JSON, this
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option has no effect.
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-p, --pretty
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Generate human-readable JSON output. Implies **-j**.
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-f, --bpffs
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Show file names of pinned programs.
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EXAMPLES
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========
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**# bpftool prog show**
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::
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10: xdp name some_prog tag 005a3d2123620c8b gpl
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loaded_at Sep 29/20:11 uid 0
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xlated 528B jited 370B memlock 4096B map_ids 10
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**# bpftool --json --pretty prog show**
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::
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{
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"programs": [{
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"id": 10,
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"type": "xdp",
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"tag": "005a3d2123620c8b",
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"gpl_compatible": true,
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"loaded_at": "Sep 29/20:11",
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"uid": 0,
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"bytes_xlated": 528,
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"jited": true,
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"bytes_jited": 370,
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"bytes_memlock": 4096,
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"map_ids": [10
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]
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}
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]
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}
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| **# bpftool prog dump xlated id 10 file /tmp/t**
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| **# ls -l /tmp/t**
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| -rw------- 1 root root 560 Jul 22 01:42 /tmp/t
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**# bpftool prog dum jited tag 005a3d2123620c8b**
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::
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push %rbp
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mov %rsp,%rbp
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sub $0x228,%rsp
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sub $0x28,%rbp
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mov %rbx,0x0(%rbp)
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| **# mount -t bpf none /sys/fs/bpf/**
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| **# bpftool prog pin id 10 /sys/fs/bpf/prog**
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| **# bpftool prog load ./my_prog.o /sys/fs/bpf/prog2**
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| **# ls -l /sys/fs/bpf/**
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| -rw------- 1 root root 0 Jul 22 01:43 prog
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| -rw------- 1 root root 0 Jul 22 01:44 prog2
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**# bpftool prog dum jited pinned /sys/fs/bpf/prog opcodes**
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::
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push %rbp
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55
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mov %rsp,%rbp
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48 89 e5
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sub $0x228,%rsp
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48 81 ec 28 02 00 00
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sub $0x28,%rbp
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48 83 ed 28
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mov %rbx,0x0(%rbp)
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48 89 5d 00
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SEE ALSO
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========
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**bpftool**\ (8), **bpftool-map**\ (8), **bpftool-cgroup**\ (8)
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