diff options
| author | Chao Yu <yuchao0@huawei.com> | 2019-07-17 11:06:11 +0200 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2019-08-23 16:57:15 +0200 |
| commit | 4507847c86bfc64e9bdce941a0f707560d3df98a (patch) | |
| tree | 7e76cf839e82f3fdbf71f09943f0feb7e68bb7de /fs/f2fs/f2fs.h | |
| parent | f2fs: fix to avoid data corruption by forbidding SSR overwrite (diff) | |
| download | linux-4507847c86bfc64e9bdce941a0f707560d3df98a.tar.xz linux-4507847c86bfc64e9bdce941a0f707560d3df98a.zip | |
f2fs: support FS_IOC_{GET,SET}FSLABEL
Support two generic fs ioctls FS_IOC_{GET,SET}FSLABEL, letting
f2fs pass generic/492 testcase.
Fixes were made by Eric where:
- f2fs: fix buffer overruns in FS_IOC_{GET, SET}FSLABEL
utf16s_to_utf8s() and utf8s_to_utf16s() take the number of characters,
not the number of bytes.
- f2fs: fix copying too many bytes in FS_IOC_SETFSLABEL
Userspace provides a null-terminated string, so don't assume that the
full FSLABEL_MAX bytes can always be copied.
- f2fs: add missing authorization check in FS_IOC_SETFSLABEL
FS_IOC_SETFSLABEL modifies the filesystem superblock, so it shouldn't be
allowed to regular users. Require CAP_SYS_ADMIN, like xfs and btrfs do.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/f2fs.h')
| -rw-r--r-- | fs/f2fs/f2fs.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 09ad4116d635..d2b718e33f88 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -418,6 +418,9 @@ static inline bool __has_cursum_space(struct f2fs_journal *journal, #define F2FS_IOC_PRECACHE_EXTENTS _IO(F2FS_IOCTL_MAGIC, 15) #define F2FS_IOC_RESIZE_FS _IOW(F2FS_IOCTL_MAGIC, 16, __u64) +#define F2FS_IOC_GET_VOLUME_NAME FS_IOC_GETFSLABEL +#define F2FS_IOC_SET_VOLUME_NAME FS_IOC_SETFSLABEL + #define F2FS_IOC_SET_ENCRYPTION_POLICY FS_IOC_SET_ENCRYPTION_POLICY #define F2FS_IOC_GET_ENCRYPTION_POLICY FS_IOC_GET_ENCRYPTION_POLICY #define F2FS_IOC_GET_ENCRYPTION_PWSALT FS_IOC_GET_ENCRYPTION_PWSALT |