2 * linux/fs/ext2/xattr_security.c
3 * Handler for storing security labels as extended attributes.
6 #include <linux/slab.h>
7 #include <linux/string.h>
9 #include <linux/ext2_fs.h>
10 #include <linux/security.h>
14 ext2_xattr_security_list(struct dentry *dentry, char *list, size_t list_size,
15 const char *name, size_t name_len, int type)
17 const int prefix_len = XATTR_SECURITY_PREFIX_LEN;
18 const size_t total_len = prefix_len + name_len + 1;
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';
29 ext2_xattr_security_get(struct dentry *dentry, const char *name,
30 void *buffer, size_t size, int type)
32 if (strcmp(name, "") == 0)
34 return ext2_xattr_get(dentry->d_inode, EXT2_XATTR_INDEX_SECURITY, name,
39 ext2_xattr_security_set(struct dentry *dentry, const char *name,
40 const void *value, size_t size, int flags, int type)
42 if (strcmp(name, "") == 0)
44 return ext2_xattr_set(dentry->d_inode, EXT2_XATTR_INDEX_SECURITY, name,
48 int ext2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
51 const struct xattr *xattr;
54 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
55 err = ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY,
56 xattr->name, xattr->value,
65 ext2_init_security(struct inode *inode, struct inode *dir,
66 const struct qstr *qstr)
68 return security_inode_init_security(inode, dir, qstr,
69 &ext2_initxattrs, NULL);
72 const struct xattr_handler ext2_xattr_security_handler = {
73 .prefix = XATTR_SECURITY_PREFIX,
74 .list = ext2_xattr_security_list,
75 .get = ext2_xattr_security_get,
76 .set = ext2_xattr_security_set,