Commit | Line | Data |
---|---|---|
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 | #ifdef CONFIG_REISERFS_FS_POSIX_ACL | |
10 | # include <linux/reiserfs_acl.h> | |
11 | #endif | |
12 | ||
13 | #define XATTR_USER_PREFIX "user." | |
14 | ||
15 | static int | |
bd4c625c | 16 | user_get(struct inode *inode, const char *name, void *buffer, size_t size) |
1da177e4 LT |
17 | { |
18 | ||
bd4c625c | 19 | int error; |
1da177e4 | 20 | |
bd4c625c LT |
21 | if (strlen(name) < sizeof(XATTR_USER_PREFIX)) |
22 | return -EINVAL; | |
1da177e4 | 23 | |
bd4c625c LT |
24 | if (!reiserfs_xattrs_user(inode->i_sb)) |
25 | return -EOPNOTSUPP; | |
1da177e4 | 26 | |
bd4c625c LT |
27 | error = reiserfs_permission_locked(inode, MAY_READ, NULL); |
28 | if (error) | |
29 | return error; | |
1da177e4 | 30 | |
bd4c625c | 31 | return reiserfs_xattr_get(inode, name, buffer, size); |
1da177e4 LT |
32 | } |
33 | ||
34 | static int | |
bd4c625c LT |
35 | user_set(struct inode *inode, const char *name, const void *buffer, |
36 | size_t size, int flags) | |
1da177e4 LT |
37 | { |
38 | ||
bd4c625c | 39 | int error; |
1da177e4 | 40 | |
bd4c625c LT |
41 | if (strlen(name) < sizeof(XATTR_USER_PREFIX)) |
42 | return -EINVAL; | |
1da177e4 | 43 | |
bd4c625c LT |
44 | if (!reiserfs_xattrs_user(inode->i_sb)) |
45 | return -EOPNOTSUPP; | |
1da177e4 | 46 | |
bd4c625c LT |
47 | if (!S_ISREG(inode->i_mode) && |
48 | (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX)) | |
49 | return -EPERM; | |
1da177e4 | 50 | |
bd4c625c LT |
51 | error = reiserfs_permission_locked(inode, MAY_WRITE, NULL); |
52 | if (error) | |
53 | return error; | |
1da177e4 | 54 | |
bd4c625c | 55 | return reiserfs_xattr_set(inode, name, buffer, size, flags); |
1da177e4 LT |
56 | } |
57 | ||
bd4c625c | 58 | static int user_del(struct inode *inode, const char *name) |
1da177e4 | 59 | { |
bd4c625c | 60 | int error; |
1da177e4 | 61 | |
bd4c625c LT |
62 | if (strlen(name) < sizeof(XATTR_USER_PREFIX)) |
63 | return -EINVAL; | |
1da177e4 | 64 | |
bd4c625c LT |
65 | if (!reiserfs_xattrs_user(inode->i_sb)) |
66 | return -EOPNOTSUPP; | |
1da177e4 | 67 | |
bd4c625c LT |
68 | if (!S_ISREG(inode->i_mode) && |
69 | (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX)) | |
70 | return -EPERM; | |
1da177e4 | 71 | |
bd4c625c LT |
72 | error = reiserfs_permission_locked(inode, MAY_WRITE, NULL); |
73 | if (error) | |
74 | return error; | |
1da177e4 | 75 | |
bd4c625c | 76 | return 0; |
1da177e4 LT |
77 | } |
78 | ||
79 | static int | |
bd4c625c | 80 | user_list(struct inode *inode, const char *name, int namelen, char *out) |
1da177e4 | 81 | { |
bd4c625c LT |
82 | int len = namelen; |
83 | if (!reiserfs_xattrs_user(inode->i_sb)) | |
84 | return 0; | |
1da177e4 | 85 | |
bd4c625c LT |
86 | if (out) |
87 | memcpy(out, name, len); | |
1da177e4 | 88 | |
bd4c625c | 89 | return len; |
1da177e4 LT |
90 | } |
91 | ||
92 | struct reiserfs_xattr_handler user_handler = { | |
93 | .prefix = XATTR_USER_PREFIX, | |
94 | .get = user_get, | |
95 | .set = user_set, | |
96 | .del = user_del, | |
97 | .list = user_list, | |
98 | }; |