bcache: set largest seq to ja->seq[bucket_index] in journal_read_bucket()
authorColy Li <colyli@suse.de>
Fri, 28 Jun 2019 11:59:51 +0000 (19:59 +0800)
committerJens Axboe <axboe@kernel.dk>
Fri, 28 Jun 2019 13:39:17 +0000 (07:39 -0600)
commita231f07a5fe30a522b402011c5190cb936641a66
treeee29a6ab832e636dc2c5fa23af822f1f5294d0b0
parent2464b693148e5d5ca42b6064bb40c1a275ea61cd
bcache: set largest seq to ja->seq[bucket_index] in journal_read_bucket()

In journal_read_bucket() when setting ja->seq[bucket_index], there might
be potential case that a later non-maximum overwrites a better sequence
number to ja->seq[bucket_index]. This patch adds a check to make sure
that ja->seq[bucket_index] will be only set a new value if it is bigger
then current value.

Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
drivers/md/bcache/journal.c