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| author | NeilBrown <neilb@suse.de> | 2022-01-17 09:07:26 +1100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-01-20 09:13:13 +0100 |
| commit | d5df26479c825c4891aea4ce1a518453a49ad217 (patch) | |
| tree | da7c68509a57b1d85797ccd4a82ff19bbe52eab0 /include | |
| parent | 760a85303c5a2aeb811f92c76b8dca4c13bf3416 (diff) | |
| download | linux-d5df26479c825c4891aea4ce1a518453a49ad217.tar.gz linux-d5df26479c825c4891aea4ce1a518453a49ad217.tar.bz2 linux-d5df26479c825c4891aea4ce1a518453a49ad217.zip | |
devtmpfs regression fix: reconfigure on each mount
commit a6097180d884ddab769fb25588ea8598589c218c upstream.
Prior to Linux v5.4 devtmpfs used mount_single() which treats the given
mount options as "remount" options, so it updates the configuration of
the single super_block on each mount.
Since that was changed, the mount options used for devtmpfs are ignored.
This is a regression which affect systemd - which mounts devtmpfs with
"-o mode=755,size=4m,nr_inodes=1m".
This patch restores the "remount" effect by calling reconfigure_single()
Fixes: d401727ea0d7 ("devtmpfs: don't mix {ramfs,shmem}_fill_super() with mount_single()")
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/fs_context.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/fs_context.h b/include/linux/fs_context.h index 6b54982fc5f3..13fa6f3df8e4 100644 --- a/include/linux/fs_context.h +++ b/include/linux/fs_context.h @@ -142,6 +142,8 @@ extern void put_fs_context(struct fs_context *fc); extern int vfs_parse_fs_param_source(struct fs_context *fc, struct fs_parameter *param); extern void fc_drop_locked(struct fs_context *fc); +int reconfigure_single(struct super_block *s, + int flags, void *data); /* * sget() wrappers to be called from the ->get_tree() op. |