1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * linux/fs/ext2/xattr_security.c |
4 | * Handler for storing security labels as extended attributes. |
5 | */ |
6 | |
7 | #include "ext2.h" |
8 | #include <linux/security.h> |
9 | #include "xattr.h" |
10 | |
11 | static int |
12 | ext2_xattr_security_get(const struct xattr_handler *handler, |
13 | struct dentry *unused, struct inode *inode, |
14 | const char *name, void *buffer, size_t size) |
15 | { |
16 | return ext2_xattr_get(inode, EXT2_XATTR_INDEX_SECURITY, name, |
17 | buffer, size); |
18 | } |
19 | |
20 | static int |
21 | ext2_xattr_security_set(const struct xattr_handler *handler, |
22 | struct mnt_idmap *idmap, |
23 | struct dentry *unused, struct inode *inode, |
24 | const char *name, const void *value, |
25 | size_t size, int flags) |
26 | { |
27 | return ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY, name, |
28 | value, size, flags); |
29 | } |
30 | |
31 | static int ext2_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
32 | void *fs_info) |
33 | { |
34 | const struct xattr *xattr; |
35 | int err = 0; |
36 | |
37 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { |
38 | err = ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY, |
39 | xattr->name, xattr->value, |
40 | xattr->value_len, 0); |
41 | if (err < 0) |
42 | break; |
43 | } |
44 | return err; |
45 | } |
46 | |
47 | int |
48 | ext2_init_security(struct inode *inode, struct inode *dir, |
49 | const struct qstr *qstr) |
50 | { |
51 | return security_inode_init_security(inode, dir, qstr, |
52 | initxattrs: &ext2_initxattrs, NULL); |
53 | } |
54 | |
55 | const struct xattr_handler ext2_xattr_security_handler = { |
56 | .prefix = XATTR_SECURITY_PREFIX, |
57 | .get = ext2_xattr_security_get, |
58 | .set = ext2_xattr_security_set, |
59 | }; |
60 | |