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Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/reiserfs_fs.h> |
2 | #include <linux/errno.h> | |
3 | #include <linux/fs.h> | |
4 | #include <linux/pagemap.h> | |
5 | #include <linux/xattr.h> | |
6 | #include <linux/reiserfs_xattr.h> | |
7 | #include <asm/uaccess.h> | |
8 | ||
9 | #define XATTR_TRUSTED_PREFIX "trusted." | |
10 | ||
11 | static int | |
12 | trusted_get (struct inode *inode, const char *name, void *buffer, size_t size) | |
13 | { | |
14 | if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX)) | |
15 | return -EINVAL; | |
16 | ||
17 | if (!reiserfs_xattrs (inode->i_sb)) | |
18 | return -EOPNOTSUPP; | |
19 | ||
20 | if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode))) | |
21 | return -EPERM; | |
22 | ||
23 | return reiserfs_xattr_get (inode, name, buffer, size); | |
24 | } | |
25 | ||
26 | static int | |
27 | trusted_set (struct inode *inode, const char *name, const void *buffer, | |
28 | size_t size, int flags) | |
29 | { | |
30 | if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX)) | |
31 | return -EINVAL; | |
32 | ||
33 | if (!reiserfs_xattrs (inode->i_sb)) | |
34 | return -EOPNOTSUPP; | |
35 | ||
36 | if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode))) | |
37 | return -EPERM; | |
38 | ||
39 | return reiserfs_xattr_set (inode, name, buffer, size, flags); | |
40 | } | |
41 | ||
42 | static int | |
43 | trusted_del (struct inode *inode, const char *name) | |
44 | { | |
45 | if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX)) | |
46 | return -EINVAL; | |
47 | ||
48 | if (!reiserfs_xattrs (inode->i_sb)) | |
49 | return -EOPNOTSUPP; | |
50 | ||
51 | if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode))) | |
52 | return -EPERM; | |
53 | ||
54 | return 0; | |
55 | } | |
56 | ||
57 | static int | |
58 | trusted_list (struct inode *inode, const char *name, int namelen, char *out) | |
59 | { | |
60 | int len = namelen; | |
61 | ||
62 | if (!reiserfs_xattrs (inode->i_sb)) | |
63 | return 0; | |
64 | ||
65 | if (!(capable(CAP_SYS_ADMIN) || is_reiserfs_priv_object(inode))) | |
66 | return 0; | |
67 | ||
68 | if (out) | |
69 | memcpy (out, name, len); | |
70 | ||
71 | return len; | |
72 | } | |
73 | ||
74 | ||
75 | struct reiserfs_xattr_handler trusted_handler = { | |
76 | .prefix = XATTR_TRUSTED_PREFIX, | |
77 | .get = trusted_get, | |
78 | .set = trusted_set, | |
79 | .del = trusted_del, | |
80 | .list = trusted_list, | |
81 | }; |