Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/ext2/xattr_security.c | |
3 | * Handler for storing security labels as extended attributes. | |
4 | */ | |
5 | ||
f7699f2b | 6 | #include "ext2.h" |
10f47e6a | 7 | #include <linux/security.h> |
1da177e4 LT |
8 | #include "xattr.h" |
9 | ||
10 | static size_t | |
431547b3 CH |
11 | ext2_xattr_security_list(struct dentry *dentry, char *list, size_t list_size, |
12 | const char *name, size_t name_len, int type) | |
1da177e4 | 13 | { |
f905f06f | 14 | const int prefix_len = XATTR_SECURITY_PREFIX_LEN; |
1da177e4 LT |
15 | const size_t total_len = prefix_len + name_len + 1; |
16 | ||
17 | if (list && total_len <= list_size) { | |
18 | memcpy(list, XATTR_SECURITY_PREFIX, prefix_len); | |
19 | memcpy(list+prefix_len, name, name_len); | |
20 | list[prefix_len + name_len] = '\0'; | |
21 | } | |
22 | return total_len; | |
23 | } | |
24 | ||
25 | static int | |
431547b3 CH |
26 | ext2_xattr_security_get(struct dentry *dentry, const char *name, |
27 | void *buffer, size_t size, int type) | |
1da177e4 LT |
28 | { |
29 | if (strcmp(name, "") == 0) | |
30 | return -EINVAL; | |
431547b3 | 31 | return ext2_xattr_get(dentry->d_inode, EXT2_XATTR_INDEX_SECURITY, name, |
1da177e4 LT |
32 | buffer, size); |
33 | } | |
34 | ||
35 | static int | |
431547b3 CH |
36 | ext2_xattr_security_set(struct dentry *dentry, const char *name, |
37 | const void *value, size_t size, int flags, int type) | |
1da177e4 LT |
38 | { |
39 | if (strcmp(name, "") == 0) | |
40 | return -EINVAL; | |
431547b3 | 41 | return ext2_xattr_set(dentry->d_inode, EXT2_XATTR_INDEX_SECURITY, name, |
1da177e4 LT |
42 | value, size, flags); |
43 | } | |
44 | ||
17cd48e4 RK |
45 | static int ext2_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
46 | void *fs_info) | |
10f47e6a | 47 | { |
9d8f13ba MZ |
48 | const struct xattr *xattr; |
49 | int err = 0; | |
10f47e6a | 50 | |
9d8f13ba MZ |
51 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { |
52 | err = ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY, | |
53 | xattr->name, xattr->value, | |
54 | xattr->value_len, 0); | |
55 | if (err < 0) | |
56 | break; | |
10f47e6a | 57 | } |
10f47e6a SS |
58 | return err; |
59 | } | |
60 | ||
9d8f13ba MZ |
61 | int |
62 | ext2_init_security(struct inode *inode, struct inode *dir, | |
63 | const struct qstr *qstr) | |
64 | { | |
65 | return security_inode_init_security(inode, dir, qstr, | |
66 | &ext2_initxattrs, NULL); | |
67 | } | |
68 | ||
749c72ef | 69 | const struct xattr_handler ext2_xattr_security_handler = { |
1da177e4 LT |
70 | .prefix = XATTR_SECURITY_PREFIX, |
71 | .list = ext2_xattr_security_list, | |
72 | .get = ext2_xattr_security_get, | |
73 | .set = ext2_xattr_security_set, | |
74 | }; |