Merge by hand (conflicts in sd.c)
[linux-2.6] / fs / ext3 / xattr_security.c
1 /*
2  * linux/fs/ext3/xattr_security.c
3  * Handler for storing security labels as extended attributes.
4  */
5
6 #include <linux/module.h>
7 #include <linux/string.h>
8 #include <linux/fs.h>
9 #include <linux/smp_lock.h>
10 #include <linux/ext3_jbd.h>
11 #include <linux/ext3_fs.h>
12 #include "xattr.h"
13
14 static size_t
15 ext3_xattr_security_list(struct inode *inode, char *list, size_t list_size,
16                          const char *name, size_t name_len)
17 {
18         const size_t prefix_len = sizeof(XATTR_SECURITY_PREFIX)-1;
19         const size_t total_len = prefix_len + name_len + 1;
20
21
22         if (list && total_len <= list_size) {
23                 memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
24                 memcpy(list+prefix_len, name, name_len);
25                 list[prefix_len + name_len] = '\0';
26         }
27         return total_len;
28 }
29
30 static int
31 ext3_xattr_security_get(struct inode *inode, const char *name,
32                        void *buffer, size_t size)
33 {
34         if (strcmp(name, "") == 0)
35                 return -EINVAL;
36         return ext3_xattr_get(inode, EXT3_XATTR_INDEX_SECURITY, name,
37                               buffer, size);
38 }
39
40 static int
41 ext3_xattr_security_set(struct inode *inode, const char *name,
42                        const void *value, size_t size, int flags)
43 {
44         if (strcmp(name, "") == 0)
45                 return -EINVAL;
46         return ext3_xattr_set(inode, EXT3_XATTR_INDEX_SECURITY, name,
47                               value, size, flags);
48 }
49
50 struct xattr_handler ext3_xattr_security_handler = {
51         .prefix = XATTR_SECURITY_PREFIX,
52         .list   = ext3_xattr_security_list,
53         .get    = ext3_xattr_security_get,
54         .set    = ext3_xattr_security_set,
55 };