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| author | Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com> | 2021-05-10 20:24:44 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2021-05-14 11:22:08 -0700 |
| commit | d927ccfccb009ede24448d69c08b12e7c8a6979b (patch) | |
| tree | 9066ad0a4da1b9828ef376056af7e41cb6e20dea /fs/f2fs | |
| parent | cad83c968c2ebe97905f900326988ed37146c347 (diff) | |
| download | linux-d927ccfccb009ede24448d69c08b12e7c8a6979b.tar.bz2 | |
f2fs: Prevent swap file in LFS mode
The kernel writes to swap files on f2fs directly without the assistance
of the filesystem. This direct write by kernel can be non-sequential
even when the f2fs is in LFS mode. Such non-sequential write conflicts
with the LFS semantics. Especially when f2fs is set up on zoned block
devices, the non-sequential write causes unaligned write command errors.
To avoid the non-sequential writes to swap files, prevent swap file
activation when the filesystem is in LFS mode.
Fixes: 4969c06a0d83 ("f2fs: support swap file w/ DIO")
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Cc: stable@vger.kernel.org # v5.10+
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/data.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index d352f2bea369..d4795eda12fa 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -4076,6 +4076,12 @@ static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file, if (f2fs_readonly(F2FS_I_SB(inode)->sb)) return -EROFS; + if (f2fs_lfs_mode(F2FS_I_SB(inode))) { + f2fs_err(F2FS_I_SB(inode), + "Swapfile not supported in LFS mode"); + return -EINVAL; + } + ret = f2fs_convert_inline_inode(inode); if (ret) return ret; |