diff options
Diffstat (limited to 'include/linux/fs.h')
-rw-r--r-- | include/linux/fs.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 75a10b632edd..ae0e2fb7bcea 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1671,6 +1671,17 @@ static inline bool sb_write_started(const struct super_block *sb) } /** + * sb_write_not_started - check if SB_FREEZE_WRITE is not held + * @sb: the super we write to + * + * May be false positive with !CONFIG_LOCKDEP/LOCK_STATE_UNKNOWN. + */ +static inline bool sb_write_not_started(const struct super_block *sb) +{ + return __sb_write_started(sb, SB_FREEZE_WRITE) <= 0; +} + +/** * file_write_started - check if SB_FREEZE_WRITE is held * @file: the file we write to * @@ -1686,6 +1697,21 @@ static inline bool file_write_started(const struct file *file) } /** + * file_write_not_started - check if SB_FREEZE_WRITE is not 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_not_started(const struct file *file) +{ + if (!S_ISREG(file_inode(file)->i_mode)) + return true; + return sb_write_not_started(file_inode(file)->i_sb); +} + +/** * sb_end_write - drop write access to a superblock * @sb: the super we wrote to * |