diff options
| author | Darrick J. Wong <darrick.wong@oracle.com> | 2019-08-30 15:44:19 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2019-09-05 17:56:11 -0700 |
| commit | 4c482a3f8f8e22a182a91601652a44eaeb61139a (patch) | |
| tree | bb46cfc445791b5004c446c75ed3e7a407cbad48 /include/linux/fs.h | |
| parent | 59f04e11d617cf533e62a2c0ecfd02dcd98bc7a2 (diff) | |
vfs: don't allow writes to swap filesimmutable-swapfiles_2019-09-05
Don't let userspace write to an active swap file because the kernel
effectively has a long term lease on the storage and things could get
seriously corrupted if we let this happen.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'include/linux/fs.h')
| -rw-r--r-- | include/linux/fs.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 997a530ff4e9..31f5c6ae1b45 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -3553,4 +3553,15 @@ static inline void simple_fill_fsxattr(struct fsxattr *fa, __u32 xflags) fa->fsx_xflags = xflags; } +/* + * Flush file data before changing attributes. Caller must hold any locks + * required to prevent further writes to this file until we're done setting + * flags. + */ +static inline int inode_drain_writes(struct inode *inode) +{ + inode_dio_wait(inode); + return filemap_write_and_wait(inode->i_mapping); +} + #endif /* _LINUX_FS_H */ |