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Merge branch 'for-4.8/core' of git://git.kernel.dk/linux-block

Browse source 
Pull core block updates from Jens Axboe:

   - the big change is the cleanup from Mike Christie, cleaning up our
     uses of command types and modified flags.  This is what will throw
     some merge conflicts

   - regression fix for the above for btrfs, from Vincent

   - following up to the above, better packing of struct request from
     Christoph

   - a 2038 fix for blktrace from Arnd

   - a few trivial/spelling fixes from Bart Van Assche

   - a front merge check fix from Damien, which could cause issues on
     SMR drives

   - Atari partition fix from Gabriel

   - convert cfq to highres timers, since jiffies isn't granular enough
     for some devices these days.  From Jan and Jeff

   - CFQ priority boost fix idle classes, from me

   - cleanup series from Ming, improving our bio/bvec iteration

   - a direct issue fix for blk-mq from Omar

   - fix for plug merging not involving the IO scheduler, like we do for
     other types of merges.  From Tahsin

   - expose DAX type internally and through sysfs.  From Toshi and Yigal

* 'for-4.8/core' of git://git.kernel.dk/linux-block: (76 commits)
  block: Fix front merge check
  block: do not merge requests without consulting with io scheduler
  block: Fix spelling in a source code comment
  block: expose QUEUE_FLAG_DAX in sysfs
  block: add QUEUE_FLAG_DAX for devices to advertise their DAX support
  Btrfs: fix comparison in __btrfs_map_block()
  block: atari: Return early for unsupported sector size
  Doc: block: Fix a typo in queue-sysfs.txt
  cfq-iosched: Charge at least 1 jiffie instead of 1 ns
  cfq-iosched: Fix regression in bonnie++ rewrite performance
  cfq-iosched: Convert slice_resid from u64 to s64
  block: Convert fifo_time from ulong to u64
  blktrace: avoid using timespec
  block/blk-cgroup.c: Declare local symbols static
  block/bio-integrity.c: Add #include "blk.h"
  block/partition-generic.c: Remove a set-but-not-used variable
  block: bio: kill BIO_MAX_SIZE
  cfq-iosched: temporarily boost queue priority for idle classes
  block: drbd: avoid to use BIO_MAX_SIZE
  block: bio: remove BIO_MAX_SECTORS
  ...
This commit is contained in:
Linus Torvalds 2016-07-26 15:03:07 -07:00
commit d05d7f4079
199 changed files with 1919 additions and 1524 deletions
Download patch file Download diff file Expand all files Collapse all files

69
fs/buffer.c
View file

@ -45,7 +45,7 @@
#include <trace/events/block.h>
static int fsync_buffers_list(spinlock_t *lock, struct list_head *list);
static int submit_bh_wbc(int rw, struct buffer_head *bh,
static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
unsigned long bio_flags,
struct writeback_control *wbc);
@ -588,7 +588,7 @@ void write_boundary_block(struct block_device *bdev,
struct buffer_head *bh = __find_get_block(bdev, bblock + 1, blocksize);
if (bh) {
if (buffer_dirty(bh))
ll_rw_block(WRITE, 1, &bh);
ll_rw_block(REQ_OP_WRITE, 0, 1, &bh);
put_bh(bh);
}
}
@ -1225,7 +1225,7 @@ static struct buffer_head *__bread_slow(struct buffer_head *bh)
} else {
get_bh(bh);
bh->b_end_io = end_buffer_read_sync;
submit_bh(READ, bh);
submit_bh(REQ_OP_READ, 0, bh);
wait_on_buffer(bh);
if (buffer_uptodate(bh))
return bh;
@ -1395,7 +1395,7 @@ void __breadahead(struct block_device *bdev, sector_t block, unsigned size)
{
struct buffer_head *bh = __getblk(bdev, block, size);
if (likely(bh)) {
ll_rw_block(READA, 1, &bh);
ll_rw_block(REQ_OP_READ, READA, 1, &bh);
brelse(bh);
}
}
@ -1697,7 +1697,7 @@ int __block_write_full_page(struct inode *inode, struct page *page,
struct buffer_head *bh, *head;
unsigned int blocksize, bbits;
int nr_underway = 0;
int write_op = (wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC : WRITE);
int write_flags = (wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC : 0);
head = create_page_buffers(page, inode,
(1 << BH_Dirty)|(1 << BH_Uptodate));
@ -1786,7 +1786,7 @@ int __block_write_full_page(struct inode *inode, struct page *page,
do {
struct buffer_head *next = bh->b_this_page;
if (buffer_async_write(bh)) {
submit_bh_wbc(write_op, bh, 0, wbc);
submit_bh_wbc(REQ_OP_WRITE, write_flags, bh, 0, wbc);
nr_underway++;
}
bh = next;
@ -1840,7 +1840,7 @@ recover:
struct buffer_head *next = bh->b_this_page;
if (buffer_async_write(bh)) {
clear_buffer_dirty(bh);
submit_bh_wbc(write_op, bh, 0, wbc);
submit_bh_wbc(REQ_OP_WRITE, write_flags, bh, 0, wbc);
nr_underway++;
}
bh = next;
@ -1956,7 +1956,7 @@ int __block_write_begin(struct page *page, loff_t pos, unsigned len,
if (!buffer_uptodate(bh) && !buffer_delay(bh) &&
!buffer_unwritten(bh) &&
(block_start < from || block_end > to)) {
ll_rw_block(READ, 1, &bh);
ll_rw_block(REQ_OP_READ, 0, 1, &bh);
*wait_bh++=bh;
}
}
@ -2249,7 +2249,7 @@ int block_read_full_page(struct page *page, get_block_t *get_block)
if (buffer_uptodate(bh))
end_buffer_async_read(bh, 1);
else
submit_bh(READ, bh);
submit_bh(REQ_OP_READ, 0, bh);
}
return 0;
}
@ -2583,7 +2583,7 @@ int nobh_write_begin(struct address_space *mapping,
if (block_start < from || block_end > to) {
lock_buffer(bh);
bh->b_end_io = end_buffer_read_nobh;
submit_bh(READ, bh);
submit_bh(REQ_OP_READ, 0, bh);
nr_reads++;
}
}
@ -2853,7 +2853,7 @@ int block_truncate_page(struct address_space *mapping,
if (!buffer_uptodate(bh) && !buffer_delay(bh) && !buffer_unwritten(bh)) {
err = -EIO;
ll_rw_block(READ, 1, &bh);
ll_rw_block(REQ_OP_READ, 0, 1, &bh);
wait_on_buffer(bh);
/* Uhhuh. Read error. Complain and punt. */
if (!buffer_uptodate(bh))
@ -2950,7 +2950,7 @@ static void end_bio_bh_io_sync(struct bio *bio)
* errors, this only handles the "we need to be able to
* do IO at the final sector" case.
*/
void guard_bio_eod(int rw, struct bio *bio)
void guard_bio_eod(int op, struct bio *bio)
{
sector_t maxsector;
struct bio_vec *bvec = &bio->bi_io_vec[bio->bi_vcnt - 1];
@ -2980,13 +2980,13 @@ void guard_bio_eod(int rw, struct bio *bio)
bvec->bv_len -= truncated_bytes;
/* ..and clear the end of the buffer for reads */
if ((rw & RW_MASK) == READ) {
if (op == REQ_OP_READ) {
zero_user(bvec->bv_page, bvec->bv_offset + bvec->bv_len,
truncated_bytes);
}
}
static int submit_bh_wbc(int rw, struct buffer_head *bh,
static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
unsigned long bio_flags, struct writeback_control *wbc)
{
struct bio *bio;
@ -3000,7 +3000,7 @@ static int submit_bh_wbc(int rw, struct buffer_head *bh,
/*
* Only clear out a write error when rewriting
*/
if (test_set_buffer_req(bh) && (rw & WRITE))
if (test_set_buffer_req(bh) && (op == REQ_OP_WRITE))
clear_buffer_write_io_error(bh);
/*
@ -3025,32 +3025,35 @@ static int submit_bh_wbc(int rw, struct buffer_head *bh,
bio->bi_flags |= bio_flags;
/* Take care of bh's that straddle the end of the device */
guard_bio_eod(rw, bio);
guard_bio_eod(op, bio);
if (buffer_meta(bh))
rw |= REQ_META;
op_flags |= REQ_META;
if (buffer_prio(bh))
rw |= REQ_PRIO;
op_flags |= REQ_PRIO;
bio_set_op_attrs(bio, op, op_flags);
submit_bio(rw, bio);
submit_bio(bio);
return 0;
}
int _submit_bh(int rw, struct buffer_head *bh, unsigned long bio_flags)
int _submit_bh(int op, int op_flags, struct buffer_head *bh,
unsigned long bio_flags)
{
return submit_bh_wbc(rw, bh, bio_flags, NULL);
return submit_bh_wbc(op, op_flags, bh, bio_flags, NULL);
}
EXPORT_SYMBOL_GPL(_submit_bh);
int submit_bh(int rw, struct buffer_head *bh)
int submit_bh(int op, int op_flags, struct buffer_head *bh)
{
return submit_bh_wbc(rw, bh, 0, NULL);
return submit_bh_wbc(op, op_flags, bh, 0, NULL);
}
EXPORT_SYMBOL(submit_bh);
/**
* ll_rw_block: low-level access to block devices (DEPRECATED)
* @rw: whether to %READ or %WRITE or maybe %READA (readahead)
* @op: whether to %READ or %WRITE
* @op_flags: rq_flag_bits or %READA (readahead)
* @nr: number of &struct buffer_heads in the array
* @bhs: array of pointers to &struct buffer_head
*
@ -3073,7 +3076,7 @@ EXPORT_SYMBOL(submit_bh);
* All of the buffers must be for the same device, and must also be a
* multiple of the current approved size for the device.
*/
void ll_rw_block(int rw, int nr, struct buffer_head *bhs[])
void ll_rw_block(int op, int op_flags, int nr, struct buffer_head *bhs[])
{
int i;
@ -3082,18 +3085,18 @@ void ll_rw_block(int rw, int nr, struct buffer_head *bhs[])
if (!trylock_buffer(bh))
continue;
if (rw == WRITE) {
if (op == WRITE) {
if (test_clear_buffer_dirty(bh)) {
bh->b_end_io = end_buffer_write_sync;
get_bh(bh);
submit_bh(WRITE, bh);
submit_bh(op, op_flags, bh);
continue;
}
} else {
if (!buffer_uptodate(bh)) {
bh->b_end_io = end_buffer_read_sync;
get_bh(bh);
submit_bh(rw, bh);
submit_bh(op, op_flags, bh);
continue;
}
}
@ -3102,7 +3105,7 @@ void ll_rw_block(int rw, int nr, struct buffer_head *bhs[])
}
EXPORT_SYMBOL(ll_rw_block);
void write_dirty_buffer(struct buffer_head *bh, int rw)
void write_dirty_buffer(struct buffer_head *bh, int op_flags)
{
lock_buffer(bh);
if (!test_clear_buffer_dirty(bh)) {
@ -3111,7 +3114,7 @@ void write_dirty_buffer(struct buffer_head *bh, int rw)
}
bh->b_end_io = end_buffer_write_sync;
get_bh(bh);
submit_bh(rw, bh);
submit_bh(REQ_OP_WRITE, op_flags, bh);
}
EXPORT_SYMBOL(write_dirty_buffer);
@ -3120,7 +3123,7 @@ EXPORT_SYMBOL(write_dirty_buffer);
* and then start new I/O and then wait upon it. The caller must have a ref on
* the buffer_head.
*/
int __sync_dirty_buffer(struct buffer_head *bh, int rw)
int __sync_dirty_buffer(struct buffer_head *bh, int op_flags)
{
int ret = 0;
@ -3129,7 +3132,7 @@ int __sync_dirty_buffer(struct buffer_head *bh, int rw)
if (test_clear_buffer_dirty(bh)) {
get_bh(bh);
bh->b_end_io = end_buffer_write_sync;
ret = submit_bh(rw, bh);
ret = submit_bh(REQ_OP_WRITE, op_flags, bh);
wait_on_buffer(bh);
if (!ret && !buffer_uptodate(bh))
ret = -EIO;
@ -3392,7 +3395,7 @@ int bh_submit_read(struct buffer_head *bh)
get_bh(bh);
bh->b_end_io = end_buffer_read_sync;
submit_bh(READ, bh);
submit_bh(REQ_OP_READ, 0, bh);
wait_on_buffer(bh);
if (buffer_uptodate(bh))
return 0;