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5
6#include <linux/slab.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"
13
14static size_t
15ext3_xattr_security_list(struct dentry *dentry, char *list, size_t list_size,
16 const char *name, size_t name_len, int type)
17{
18 const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
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
30static int
31ext3_xattr_security_get(struct dentry *dentry, const char *name,
32 void *buffer, size_t size, int type)
33{
34 if (strcmp(name, "") == 0)
35 return -EINVAL;
36 return ext3_xattr_get(dentry->d_inode, EXT3_XATTR_INDEX_SECURITY,
37 name, buffer, size);
38}
39
40static int
41ext3_xattr_security_set(struct dentry *dentry, const char *name,
42 const void *value, size_t size, int flags, int type)
43{
44 if (strcmp(name, "") == 0)
45 return -EINVAL;
46 return ext3_xattr_set(dentry->d_inode, EXT3_XATTR_INDEX_SECURITY,
47 name, value, size, flags);
48}
49
50int ext3_initxattrs(struct inode *inode, const struct xattr *xattr_array,
51 void *fs_info)
52{
53 const struct xattr *xattr;
54 handle_t *handle = fs_info;
55 int err = 0;
56
57 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
58 err = ext3_xattr_set_handle(handle, inode,
59 EXT3_XATTR_INDEX_SECURITY,
60 xattr->name, xattr->value,
61 xattr->value_len, 0);
62 if (err < 0)
63 break;
64 }
65 return err;
66}
67
68int
69ext3_init_security(handle_t *handle, struct inode *inode, struct inode *dir,
70 const struct qstr *qstr)
71{
72 return security_inode_init_security(inode, dir, qstr,
73 &ext3_initxattrs, handle);
74}
75
76const struct xattr_handler ext3_xattr_security_handler = {
77 .prefix = XATTR_SECURITY_PREFIX,
78 .list = ext3_xattr_security_list,
79 .get = ext3_xattr_security_get,
80 .set = ext3_xattr_security_set,
81};
82
