diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/fs.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index ac8b5a9b467b..75a10b632edd 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1659,12 +1659,33 @@ static inline int __sb_write_started(const struct super_block *sb, int level) return lockdep_is_held_type(sb->s_writers.rw_sem + level - 1, 1); } +/** + * sb_write_started - check if SB_FREEZE_WRITE is held + * @sb: the super we write to + * + * May be false positive with !CONFIG_LOCKDEP/LOCK_STATE_UNKNOWN. + */ static inline bool sb_write_started(const struct super_block *sb) { return __sb_write_started(sb, SB_FREEZE_WRITE); } /** + * file_write_started - check if SB_FREEZE_WRITE is held + * @file: the file we write to + * + * May be false positive with !CONFIG_LOCKDEP/LOCK_STATE_UNKNOWN. + * May be false positive with !S_ISREG, because file_start_write() has + * no effect on !S_ISREG. + */ +static inline bool file_write_started(const struct file *file) +{ + if (!S_ISREG(file_inode(file)->i_mode)) + return true; + return sb_write_started(file_inode(file)->i_sb); +} + +/** * sb_end_write - drop write access to a superblock * @sb: the super we wrote to * |