Commit | Line | Data |
---|---|---|
1da177e4 | 1 | #include <linux/reiserfs_fs.h> |
16f7e0fe | 2 | #include <linux/capability.h> |
1da177e4 LT |
3 | #include <linux/errno.h> |
4 | #include <linux/fs.h> | |
5 | #include <linux/pagemap.h> | |
6 | #include <linux/xattr.h> | |
7 | #include <linux/reiserfs_xattr.h> | |
8 | #include <asm/uaccess.h> | |
9 | ||
10 | #define XATTR_TRUSTED_PREFIX "trusted." | |
11 | ||
12 | static int | |
bd4c625c | 13 | trusted_get(struct inode *inode, const char *name, void *buffer, size_t size) |
1da177e4 | 14 | { |
bd4c625c LT |
15 | if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX)) |
16 | return -EINVAL; | |
1da177e4 | 17 | |
bd4c625c LT |
18 | if (!reiserfs_xattrs(inode->i_sb)) |
19 | return -EOPNOTSUPP; | |
1da177e4 | 20 | |
bd4c625c LT |
21 | if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode))) |
22 | return -EPERM; | |
1da177e4 | 23 | |
bd4c625c | 24 | return reiserfs_xattr_get(inode, name, buffer, size); |
1da177e4 LT |
25 | } |
26 | ||
27 | static int | |
bd4c625c LT |
28 | trusted_set(struct inode *inode, const char *name, const void *buffer, |
29 | size_t size, int flags) | |
1da177e4 | 30 | { |
bd4c625c LT |
31 | if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX)) |
32 | return -EINVAL; | |
1da177e4 | 33 | |
bd4c625c LT |
34 | if (!reiserfs_xattrs(inode->i_sb)) |
35 | return -EOPNOTSUPP; | |
1da177e4 | 36 | |
bd4c625c LT |
37 | if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode))) |
38 | return -EPERM; | |
1da177e4 | 39 | |
bd4c625c | 40 | return reiserfs_xattr_set(inode, name, buffer, size, flags); |
1da177e4 LT |
41 | } |
42 | ||
bd4c625c | 43 | static int trusted_del(struct inode *inode, const char *name) |
1da177e4 | 44 | { |
bd4c625c LT |
45 | if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX)) |
46 | return -EINVAL; | |
1da177e4 | 47 | |
bd4c625c LT |
48 | if (!reiserfs_xattrs(inode->i_sb)) |
49 | return -EOPNOTSUPP; | |
1da177e4 | 50 | |
bd4c625c LT |
51 | if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode))) |
52 | return -EPERM; | |
1da177e4 | 53 | |
bd4c625c | 54 | return 0; |
1da177e4 LT |
55 | } |
56 | ||
57 | static int | |
bd4c625c | 58 | trusted_list(struct inode *inode, const char *name, int namelen, char *out) |
1da177e4 | 59 | { |
bd4c625c | 60 | int len = namelen; |
1da177e4 | 61 | |
bd4c625c LT |
62 | if (!reiserfs_xattrs(inode->i_sb)) |
63 | return 0; | |
1da177e4 | 64 | |
bd4c625c LT |
65 | if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode))) |
66 | return 0; | |
1da177e4 | 67 | |
bd4c625c LT |
68 | if (out) |
69 | memcpy(out, name, len); | |
1da177e4 | 70 | |
bd4c625c | 71 | return len; |
1da177e4 LT |
72 | } |
73 | ||
1da177e4 LT |
74 | struct reiserfs_xattr_handler trusted_handler = { |
75 | .prefix = XATTR_TRUSTED_PREFIX, | |
76 | .get = trusted_get, | |
77 | .set = trusted_set, | |
78 | .del = trusted_del, | |
79 | .list = trusted_list, | |
80 | }; |