blob: 6a6c59fbe59951d902208ef781c7a963f4617f64 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/ext2/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/ext2_fs.h>
11#include "xattr.h"
12
13static size_t
14ext2_xattr_security_list(struct inode *inode, char *list, size_t list_size,
15 const char *name, size_t name_len)
16{
17 const int prefix_len = sizeof(XATTR_SECURITY_PREFIX)-1;
18 const size_t total_len = prefix_len + name_len + 1;
19
20 if (list && total_len <= list_size) {
21 memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
22 memcpy(list+prefix_len, name, name_len);
23 list[prefix_len + name_len] = '\0';
24 }
25 return total_len;
26}
27
28static int
29ext2_xattr_security_get(struct inode *inode, const char *name,
30 void *buffer, size_t size)
31{
32 if (strcmp(name, "") == 0)
33 return -EINVAL;
34 return ext2_xattr_get(inode, EXT2_XATTR_INDEX_SECURITY, name,
35 buffer, size);
36}
37
38static int
39ext2_xattr_security_set(struct inode *inode, const char *name,
40 const void *value, size_t size, int flags)
41{
42 if (strcmp(name, "") == 0)
43 return -EINVAL;
44 return ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY, name,
45 value, size, flags);
46}
47
48struct xattr_handler ext2_xattr_security_handler = {
49 .prefix = XATTR_SECURITY_PREFIX,
50 .list = ext2_xattr_security_list,
51 .get = ext2_xattr_security_get,
52 .set = ext2_xattr_security_set,
53};