1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #include "reiserfs.h" |
3 | #include <linux/capability.h> |
4 | #include <linux/errno.h> |
5 | #include <linux/fs.h> |
6 | #include <linux/pagemap.h> |
7 | #include <linux/xattr.h> |
8 | #include "xattr.h" |
9 | #include <linux/uaccess.h> |
10 | |
11 | static int |
12 | trusted_get(const struct xattr_handler *handler, struct dentry *unused, |
13 | struct inode *inode, const char *name, void *buffer, size_t size) |
14 | { |
15 | if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode)) |
16 | return -EPERM; |
17 | |
18 | return reiserfs_xattr_get(inode, xattr_full_name(handler, name), |
19 | buffer, size); |
20 | } |
21 | |
22 | static int |
23 | trusted_set(const struct xattr_handler *handler, |
24 | struct mnt_idmap *idmap, struct dentry *unused, |
25 | struct inode *inode, const char *name, const void *buffer, |
26 | size_t size, int flags) |
27 | { |
28 | if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode)) |
29 | return -EPERM; |
30 | |
31 | return reiserfs_xattr_set(inode, |
32 | xattr_full_name(handler, name), |
33 | buffer, size, flags); |
34 | } |
35 | |
36 | static bool trusted_list(struct dentry *dentry) |
37 | { |
38 | return capable(CAP_SYS_ADMIN) && !IS_PRIVATE(d_inode(dentry)); |
39 | } |
40 | |
41 | const struct xattr_handler reiserfs_xattr_trusted_handler = { |
42 | .prefix = XATTR_TRUSTED_PREFIX, |
43 | .get = trusted_get, |
44 | .set = trusted_set, |
45 | .list = trusted_list, |
46 | }; |
47 | |