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| author | Amir Goldstein <amir73il@gmail.com> | 2018-05-13 22:40:30 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2018-05-13 22:40:30 -0400 |
| commit | 0c8e3fe35db9b66ae0030849545030ec7c0fc45c (patch) | |
| tree | 3edd5f018bd5f2e2a2b635b99eec7a30deff5782 | |
| parent | eee597ac931305eff3d3fd1d61d6aae553bc0984 (diff) | |
vfs: add the sb_start_intwrite_trylock() helper
Needed by ext4 to test frozen fs before updating s_last_mounted.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
| -rw-r--r-- | include/linux/fs.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 760d8da1b6c7..cac41f1bad05 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1597,6 +1597,11 @@ static inline void sb_start_intwrite(struct super_block *sb) __sb_start_write(sb, SB_FREEZE_FS, true); } +static inline int sb_start_intwrite_trylock(struct super_block *sb) +{ + return __sb_start_write(sb, SB_FREEZE_FS, false); +} + extern bool inode_owner_or_capable(const struct inode *inode); |