| 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, struct dentry *unused, |
| 24 | struct inode *inode, const char *name, const void *buffer, |
| 25 | size_t size, int flags) |
| 26 | { |
| 27 | if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode)) |
| 28 | return -EPERM; |
| 29 | |
| 30 | return reiserfs_xattr_set(inode, |
| 31 | xattr_full_name(handler, name), |
| 32 | buffer, size, flags); |
| 33 | } |
| 34 | |
| 35 | static bool trusted_list(struct dentry *dentry) |
| 36 | { |
| 37 | return capable(CAP_SYS_ADMIN) && !IS_PRIVATE(d_inode(dentry)); |
| 38 | } |
| 39 | |
| 40 | const struct xattr_handler reiserfs_xattr_trusted_handler = { |
| 41 | .prefix = XATTR_TRUSTED_PREFIX, |
| 42 | .get = trusted_get, |
| 43 | .set = trusted_set, |
| 44 | .list = trusted_list, |
| 45 | }; |