2 * linux/fs/ext2/xattr_security.c
3 * Handler for storing security labels as extended attributes.
7 #include <linux/security.h>
11 ext2_xattr_security_list(const struct xattr_handler *handler,
12 struct dentry *dentry, char *list, size_t list_size,
13 const char *name, size_t name_len)
15 const int prefix_len = XATTR_SECURITY_PREFIX_LEN;
16 const size_t total_len = prefix_len + name_len + 1;
18 if (list && total_len <= list_size) {
19 memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
20 memcpy(list+prefix_len, name, name_len);
21 list[prefix_len + name_len] = '\0';
27 ext2_xattr_security_get(const struct xattr_handler *handler,
28 struct dentry *dentry, const char *name,
29 void *buffer, size_t size)
31 return ext2_xattr_get(d_inode(dentry), EXT2_XATTR_INDEX_SECURITY, name,
36 ext2_xattr_security_set(const struct xattr_handler *handler,
37 struct dentry *dentry, const char *name,
38 const void *value, size_t size, int flags)
40 return ext2_xattr_set(d_inode(dentry), EXT2_XATTR_INDEX_SECURITY, name,
44 static int ext2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
47 const struct xattr *xattr;
50 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
51 err = ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY,
52 xattr->name, xattr->value,
61 ext2_init_security(struct inode *inode, struct inode *dir,
62 const struct qstr *qstr)
64 return security_inode_init_security(inode, dir, qstr,
65 &ext2_initxattrs, NULL);
68 const struct xattr_handler ext2_xattr_security_handler = {
69 .prefix = XATTR_SECURITY_PREFIX,
70 .list = ext2_xattr_security_list,
71 .get = ext2_xattr_security_get,
72 .set = ext2_xattr_security_set,