]>
Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
ac27a0ec | 2 | /* |
617ba13b | 3 | * linux/fs/ext4/xattr_security.c |
ac27a0ec DK |
4 | * Handler for storing security labels as extended attributes. |
5 | */ | |
6 | ||
ac27a0ec DK |
7 | #include <linux/string.h> |
8 | #include <linux/fs.h> | |
ac27a0ec | 9 | #include <linux/security.h> |
5a0e3ad6 | 10 | #include <linux/slab.h> |
3dcf5451 CH |
11 | #include "ext4_jbd2.h" |
12 | #include "ext4.h" | |
ac27a0ec DK |
13 | #include "xattr.h" |
14 | ||
ac27a0ec | 15 | static int |
d9a82a04 | 16 | ext4_xattr_security_get(const struct xattr_handler *handler, |
b296821a AV |
17 | struct dentry *unused, struct inode *inode, |
18 | const char *name, void *buffer, size_t size) | |
ac27a0ec | 19 | { |
b296821a | 20 | return ext4_xattr_get(inode, EXT4_XATTR_INDEX_SECURITY, |
431547b3 | 21 | name, buffer, size); |
ac27a0ec DK |
22 | } |
23 | ||
24 | static int | |
d9a82a04 | 25 | ext4_xattr_security_set(const struct xattr_handler *handler, |
e65ce2a5 | 26 | struct user_namespace *mnt_userns, |
59301226 AV |
27 | struct dentry *unused, struct inode *inode, |
28 | const char *name, const void *value, | |
29 | size_t size, int flags) | |
ac27a0ec | 30 | { |
59301226 | 31 | return ext4_xattr_set(inode, EXT4_XATTR_INDEX_SECURITY, |
431547b3 | 32 | name, value, size, flags); |
ac27a0ec DK |
33 | } |
34 | ||
176576db DH |
35 | static int |
36 | ext4_initxattrs(struct inode *inode, const struct xattr *xattr_array, | |
37 | void *fs_info) | |
ac27a0ec | 38 | { |
9d8f13ba MZ |
39 | const struct xattr *xattr; |
40 | handle_t *handle = fs_info; | |
41 | int err = 0; | |
ac27a0ec | 42 | |
9d8f13ba MZ |
43 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { |
44 | err = ext4_xattr_set_handle(handle, inode, | |
45 | EXT4_XATTR_INDEX_SECURITY, | |
46 | xattr->name, xattr->value, | |
3f706c8c | 47 | xattr->value_len, XATTR_CREATE); |
9d8f13ba MZ |
48 | if (err < 0) |
49 | break; | |
ac27a0ec | 50 | } |
ac27a0ec DK |
51 | return err; |
52 | } | |
53 | ||
9d8f13ba MZ |
54 | int |
55 | ext4_init_security(handle_t *handle, struct inode *inode, struct inode *dir, | |
56 | const struct qstr *qstr) | |
57 | { | |
58 | return security_inode_init_security(inode, dir, qstr, | |
59 | &ext4_initxattrs, handle); | |
60 | } | |
61 | ||
11e27528 | 62 | const struct xattr_handler ext4_xattr_security_handler = { |
ac27a0ec | 63 | .prefix = XATTR_SECURITY_PREFIX, |
617ba13b MC |
64 | .get = ext4_xattr_security_get, |
65 | .set = ext4_xattr_security_set, | |
ac27a0ec | 66 | }; |