These changes are the raw update to linux-4.4.6-rt14. Kernel sources
[kvmfornfv.git] / kernel / fs / jffs2 / xattr_trusted.c
1 /*
2  * JFFS2 -- Journalling Flash File System, Version 2.
3  *
4  * Copyright © 2006  NEC Corporation
5  *
6  * Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
7  *
8  * For licensing information, see the file 'LICENCE' in this directory.
9  *
10  */
11
12 #include <linux/kernel.h>
13 #include <linux/fs.h>
14 #include <linux/jffs2.h>
15 #include <linux/xattr.h>
16 #include <linux/mtd/mtd.h>
17 #include "nodelist.h"
18
19 static int jffs2_trusted_getxattr(const struct xattr_handler *handler,
20                                   struct dentry *dentry, const char *name,
21                                   void *buffer, size_t size)
22 {
23         if (!strcmp(name, ""))
24                 return -EINVAL;
25         return do_jffs2_getxattr(d_inode(dentry), JFFS2_XPREFIX_TRUSTED,
26                                  name, buffer, size);
27 }
28
29 static int jffs2_trusted_setxattr(const struct xattr_handler *handler,
30                                   struct dentry *dentry, const char *name,
31                                   const void *buffer, size_t size, int flags)
32 {
33         if (!strcmp(name, ""))
34                 return -EINVAL;
35         return do_jffs2_setxattr(d_inode(dentry), JFFS2_XPREFIX_TRUSTED,
36                                  name, buffer, size, flags);
37 }
38
39 static size_t jffs2_trusted_listxattr(const struct xattr_handler *handler,
40                                       struct dentry *dentry, char *list,
41                                       size_t list_size, const char *name,
42                                       size_t name_len)
43 {
44         size_t retlen = XATTR_TRUSTED_PREFIX_LEN + name_len + 1;
45
46         if (!capable(CAP_SYS_ADMIN))
47                 return 0;
48
49         if (list && retlen<=list_size) {
50                 strcpy(list, XATTR_TRUSTED_PREFIX);
51                 strcpy(list + XATTR_TRUSTED_PREFIX_LEN, name);
52         }
53
54         return retlen;
55 }
56
57 const struct xattr_handler jffs2_trusted_xattr_handler = {
58         .prefix = XATTR_TRUSTED_PREFIX,
59         .list = jffs2_trusted_listxattr,
60         .set = jffs2_trusted_setxattr,
61         .get = jffs2_trusted_getxattr
62 };