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| author | Andrew Ruder <andrew.ruder@elecsyscorp.com> | 2014-01-30 16:26:54 +0100 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2014-01-31 20:29:36 +0100 |
| commit | 807612db2f9940b9fa6deaef054eb16d51bd3e00 (patch) | |
| tree | f22bc5b0debad1f1833c8d349e0dbd1b3fecd607 | |
| parent | vfs: unexport the getname() symbol (diff) | |
| download | linux-807612db2f9940b9fa6deaef054eb16d51bd3e00.tar.xz linux-807612db2f9940b9fa6deaef054eb16d51bd3e00.zip | |
fs/super.c: sync ro remount after blocking writers
Move sync_filesystem() after sb_prepare_remount_readonly(). If writers
sneak in anywhere from sync_filesystem() to sb_prepare_remount_readonly()
it can cause inodes to be dirtied and writeback to occur well after
sys_mount() has completely successfully.
This was spotted by corrupted ubifs filesystems on reboot, but appears
that it can cause issues with any filesystem using writeback.
Cc: Artem Bityutskiy <dedekind1@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
CC: Richard Weinberger <richard@nod.at>
Co-authored-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Andrew Ruder <andrew.ruder@elecsyscorp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/super.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/super.c b/fs/super.c index cecd780e0f44..80d5cf2ca765 100644 --- a/fs/super.c +++ b/fs/super.c @@ -703,7 +703,6 @@ int do_remount_sb(struct super_block *sb, int flags, void *data, int force) if (flags & MS_RDONLY) acct_auto_close(sb); shrink_dcache_sb(sb); - sync_filesystem(sb); remount_ro = (flags & MS_RDONLY) && !(sb->s_flags & MS_RDONLY); @@ -720,6 +719,8 @@ int do_remount_sb(struct super_block *sb, int flags, void *data, int force) } } + sync_filesystem(sb); + if (sb->s_op->remount_fs) { retval = sb->s_op->remount_fs(sb, &flags, data); if (retval) { |