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
11static int
12trusted_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
22static int
23trusted_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
35static bool trusted_list(struct dentry *dentry)
 
36{
37	return capable(CAP_SYS_ADMIN) && !IS_PRIVATE(d_inode(dentry));
 
 
 
 
 
 
 
 
 
38}
39
40const 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};

 1#include <linux/reiserfs_fs.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 <linux/reiserfs_xattr.h>
 8#include <asm/uaccess.h>
 9
10static int
11trusted_get(struct dentry *dentry, const char *name, void *buffer, size_t size,
12	    int handler_flags)
13{
14	if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
15		return -EINVAL;
16
17	if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(dentry->d_inode))
18		return -EPERM;
19
20	return reiserfs_xattr_get(dentry->d_inode, name, buffer, size);
 
21}
22
23static int
24trusted_set(struct dentry *dentry, const char *name, const void *buffer,
25	    size_t size, int flags, int handler_flags)
 
26{
27	if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
28		return -EINVAL;
29
30	if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(dentry->d_inode))
31		return -EPERM;
32
33	return reiserfs_xattr_set(dentry->d_inode, name, buffer, size, flags);
 
 
34}
35
36static size_t trusted_list(struct dentry *dentry, char *list, size_t list_size,
37			   const char *name, size_t name_len, int handler_flags)
38{
39	const size_t len = name_len + 1;
40
41	if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(dentry->d_inode))
42		return 0;
43
44	if (list && len <= list_size) {
45		memcpy(list, name, name_len);
46		list[name_len] = '\0';
47	}
48	return len;
49}
50
51const struct xattr_handler reiserfs_xattr_trusted_handler = {
52	.prefix = XATTR_TRUSTED_PREFIX,
53	.get = trusted_get,
54	.set = trusted_set,
55	.list = trusted_list,
56};