PM / yenta: Split resume into early and late parts (rev. 4)
[linux/fpc-iii.git] / fs / ext3 / xattr_security.c
blob37b81097bdf2a147b6bd2e7720e9ae8efe8170a7
1 /*
2 * linux/fs/ext3/xattr_security.c
3 * Handler for storing security labels as extended attributes.
4 */
6 #include <linux/module.h>
7 #include <linux/string.h>
8 #include <linux/fs.h>
9 #include <linux/ext3_jbd.h>
10 #include <linux/ext3_fs.h>
11 #include <linux/security.h>
12 #include "xattr.h"
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)
18 const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
19 const size_t total_len = prefix_len + name_len + 1;
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';
27 return total_len;
30 static int
31 ext3_xattr_security_get(struct inode *inode, const char *name,
32 void *buffer, size_t size)
34 if (strcmp(name, "") == 0)
35 return -EINVAL;
36 return ext3_xattr_get(inode, EXT3_XATTR_INDEX_SECURITY, name,
37 buffer, size);
40 static int
41 ext3_xattr_security_set(struct inode *inode, const char *name,
42 const void *value, size_t size, int flags)
44 if (strcmp(name, "") == 0)
45 return -EINVAL;
46 return ext3_xattr_set(inode, EXT3_XATTR_INDEX_SECURITY, name,
47 value, size, flags);
50 int
51 ext3_init_security(handle_t *handle, struct inode *inode, struct inode *dir)
53 int err;
54 size_t len;
55 void *value;
56 char *name;
58 err = security_inode_init_security(inode, dir, &name, &value, &len);
59 if (err) {
60 if (err == -EOPNOTSUPP)
61 return 0;
62 return err;
64 err = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_SECURITY,
65 name, value, len, 0);
66 kfree(name);
67 kfree(value);
68 return err;
71 struct xattr_handler ext3_xattr_security_handler = {
72 .prefix = XATTR_SECURITY_PREFIX,
73 .list = ext3_xattr_security_list,
74 .get = ext3_xattr_security_get,
75 .set = ext3_xattr_security_set,