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ext4: replace read-only check for shutdown check in mmp code 

The multi-mount protection kthread checks for read-only filesystem and
aborts in that case. The remount code actually handles stopping of the
kthread on remount so the only purpose of the check is in case of
emergency remount read-only. Replace the check for read-only filesystem
with a check for shutdown filesystem as running MMP on such is risky
anyway and it makes ordering of things during remount simpler.

Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230616165109.21695-11-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Jan Kara 2023-06-16 18:50:57 +02:00 committed by Theodore Ts'o
parent 889860e452
commit 1e1566b9c8
1 changed files with 1 additions and 1 deletions
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2
fs/ext4/mmp.c
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@ -162,7 +162,7 @@ static int kmmpd(void *data)
memcpy(mmp->mmp_nodename, init_utsname()->nodename,
sizeof(mmp->mmp_nodename));
while (!kthread_should_stop() && !sb_rdonly(sb)) {
while (!kthread_should_stop() && !ext4_forced_shutdown(sb)) {
if (!ext4_has_feature_mmp(sb)) {
ext4_warning(sb, "kmmpd being stopped since MMP feature"
" has been disabled.");