diff options
| author | Sheng Yong <shengyong1@huawei.com> | 2018-03-15 18:51:41 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-03-17 14:02:47 +0900 |
| commit | b7c409deda6bcaaa6452b015937a013dd8b481b4 (patch) | |
| tree | 5da0435f1eb10a51ff068c2793dac3512bb6778d /fs/f2fs/super.c | |
| parent | da5ce874f8cabe18bc34b50856933108830663bc (diff) | |
f2fs: introduce F2FS_FEATURE_LOST_FOUND feature
This patch introduces a new feature, F2FS_FEATURE_LOST_FOUND, which
is set by mkfs. mkfs creates a directory named lost+found, which saves
unreachable files. If fsck finds a file which has no parent, or its
parent is removed by fsck, the file will be placed under lost+found
directory by fsck.
lost+found directory could not be encrypted. As a result, the root
directory cannot be encrypted too. So if LOST_FOUND feature is enabled,
let's avoid to encrypt root directory.
Signed-off-by: Sheng Yong <shengyong1@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/super.c')
| -rw-r--r-- | fs/f2fs/super.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 419eaacf3366..dcdae3f932e2 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -1891,6 +1891,18 @@ static int f2fs_get_context(struct inode *inode, void *ctx, size_t len) static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len, void *fs_data) { + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + + /* + * Encrypting the root directory is not allowed because fsck + * expects lost+found directory to exist and remain unencrypted + * if LOST_FOUND feature is enabled. + * + */ + if (f2fs_sb_has_lost_found(sbi->sb) && + inode->i_ino == F2FS_ROOT_INO(sbi)) + return -EPERM; + return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION, F2FS_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len, fs_data, XATTR_CREATE); |