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