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| author | Ming Lei <ming.lei@redhat.com> | 2020-01-05 09:41:14 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-01-09 08:16:12 -0700 |
| commit | 83c9c547168e8b914ea6398430473a4de68c52cc (patch) | |
| tree | 9134fc796f74f44136d488d92ab270f9b1cdf788 /fs/buffer.c | |
| parent | 57415790f405534e5578d0106d806630c325dcb3 (diff) | |
| download | lwn-83c9c547168e8b914ea6398430473a4de68c52cc.tar.gz lwn-83c9c547168e8b914ea6398430473a4de68c52cc.zip | |
fs: move guard_bio_eod() after bio_set_op_attrs
Commit 85a8ce62c2ea ("block: add bio_truncate to fix guard_bio_eod")
adds bio_truncate() for handling bio EOD. However, bio_truncate()
doesn't use the passed 'op' parameter from guard_bio_eod's callers.
So bio_trunacate() may retrieve wrong 'op', and zering pages may
not be done for READ bio.
Fixes this issue by moving guard_bio_eod() after bio_set_op_attrs()
in submit_bh_wbc() so that bio_truncate() can always retrieve correct
op info.
Meantime remove the 'op' parameter from guard_bio_eod() because it isn't
used any more.
Cc: Carlos Maiolino <cmaiolino@redhat.com>
Cc: linux-fsdevel@vger.kernel.org
Fixes: 85a8ce62c2ea ("block: add bio_truncate to fix guard_bio_eod")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Fold in kerneldoc and bio_op() change.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/buffer.c')
| -rw-r--r-- | fs/buffer.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/buffer.c b/fs/buffer.c index e94a6619464c..18a87ec8a465 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -3031,7 +3031,7 @@ 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 op, struct bio *bio) +void guard_bio_eod(struct bio *bio) { sector_t maxsector; struct hd_struct *part; @@ -3095,15 +3095,15 @@ static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh, bio->bi_end_io = end_bio_bh_io_sync; bio->bi_private = bh; - /* Take care of bh's that straddle the end of the device */ - guard_bio_eod(op, bio); - if (buffer_meta(bh)) op_flags |= REQ_META; if (buffer_prio(bh)) op_flags |= REQ_PRIO; bio_set_op_attrs(bio, op, op_flags); + /* Take care of bh's that straddle the end of the device */ + guard_bio_eod(bio); + if (wbc) { wbc_init_bio(wbc, bio); wbc_account_cgroup_owner(wbc, bh->b_page, bh->b_size); |