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/slab.h> |
14 | #include <linux/fs.h> |
15 | #include <linux/time.h> |
16 | #include <linux/pagemap.h> |
17 | #include <linux/highmem.h> |
18 | #include <linux/crc32.h> |
19 | #include <linux/jffs2.h> |
20 | #include <linux/xattr.h> |
21 | #include <linux/mtd/mtd.h> |
22 | #include <linux/security.h> |
23 | #include "nodelist.h" |
24 | |
25 | /* ---- Initial Security Label(s) Attachment callback --- */ |
26 | static int jffs2_initxattrs(struct inode *inode, |
27 | const struct xattr *xattr_array, void *fs_info) |
28 | { |
29 | const struct xattr *xattr; |
30 | int err = 0; |
31 | |
32 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { |
33 | err = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, |
34 | xname: xattr->name, buffer: xattr->value, |
35 | size: xattr->value_len, flags: 0); |
36 | if (err < 0) |
37 | break; |
38 | } |
39 | return err; |
40 | } |
41 | |
42 | /* ---- Initial Security Label(s) Attachment ----------- */ |
43 | int jffs2_init_security(struct inode *inode, struct inode *dir, |
44 | const struct qstr *qstr) |
45 | { |
46 | return security_inode_init_security(inode, dir, qstr, |
47 | initxattrs: &jffs2_initxattrs, NULL); |
48 | } |
49 | |
50 | /* ---- XATTR Handler for "security.*" ----------------- */ |
51 | static int jffs2_security_getxattr(const struct xattr_handler *handler, |
52 | struct dentry *unused, struct inode *inode, |
53 | const char *name, void *buffer, size_t size) |
54 | { |
55 | return do_jffs2_getxattr(inode, JFFS2_XPREFIX_SECURITY, |
56 | xname: name, buffer, size); |
57 | } |
58 | |
59 | static int jffs2_security_setxattr(const struct xattr_handler *handler, |
60 | struct mnt_idmap *idmap, |
61 | struct dentry *unused, struct inode *inode, |
62 | const char *name, const void *buffer, |
63 | size_t size, int flags) |
64 | { |
65 | return do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, |
66 | xname: name, buffer, size, flags); |
67 | } |
68 | |
69 | const struct xattr_handler jffs2_security_xattr_handler = { |
70 | .prefix = XATTR_SECURITY_PREFIX, |
71 | .set = jffs2_security_setxattr, |
72 | .get = jffs2_security_getxattr |
73 | }; |
74 | |