KaiGai Kohei | 652ecc2 | 2006-05-13 15:18:27 +0900 | [diff] [blame^] | 1 | /* |
| 2 | * JFFS2 -- Journalling Flash File System, Version 2. |
KaiGai Kohei | aa98d7c | 2006-05-13 15:09:47 +0900 | [diff] [blame] | 3 | * |
KaiGai Kohei | 652ecc2 | 2006-05-13 15:18:27 +0900 | [diff] [blame^] | 4 | * Copyright (C) 2006 NEC Corporation |
KaiGai Kohei | aa98d7c | 2006-05-13 15:09:47 +0900 | [diff] [blame] | 5 | * |
KaiGai Kohei | 652ecc2 | 2006-05-13 15:18:27 +0900 | [diff] [blame^] | 6 | * Created by KaiGai Kohei <kaigai@ak.jp.nec.com> |
| 7 | * |
| 8 | * For licensing information, see the file 'LICENCE' in this directory. |
| 9 | * |
| 10 | */ |
KaiGai Kohei | aa98d7c | 2006-05-13 15:09:47 +0900 | [diff] [blame] | 11 | #include <linux/kernel.h> |
| 12 | #include <linux/slab.h> |
| 13 | #include <linux/fs.h> |
| 14 | #include <linux/time.h> |
| 15 | #include <linux/pagemap.h> |
| 16 | #include <linux/highmem.h> |
| 17 | #include <linux/crc32.h> |
| 18 | #include <linux/jffs2.h> |
| 19 | #include <linux/xattr.h> |
| 20 | #include <linux/mtd/mtd.h> |
| 21 | #include <linux/security.h> |
| 22 | #include "nodelist.h" |
| 23 | |
| 24 | /* ---- Initial Security Label Attachment -------------- */ |
| 25 | int jffs2_init_security(struct inode *inode, struct inode *dir) |
| 26 | { |
| 27 | int rc; |
| 28 | size_t len; |
| 29 | void *value; |
| 30 | char *name; |
| 31 | |
| 32 | rc = security_inode_init_security(inode, dir, &name, &value, &len); |
| 33 | if (rc) { |
| 34 | if (rc == -EOPNOTSUPP) |
| 35 | return 0; |
| 36 | return rc; |
| 37 | } |
| 38 | rc = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, name, value, len, 0); |
| 39 | |
| 40 | kfree(name); |
| 41 | kfree(value); |
| 42 | return rc; |
| 43 | } |
| 44 | |
| 45 | /* ---- XATTR Handler for "security.*" ----------------- */ |
| 46 | static int jffs2_security_getxattr(struct inode *inode, const char *name, |
| 47 | void *buffer, size_t size) |
| 48 | { |
| 49 | if (!strcmp(name, "")) |
| 50 | return -EINVAL; |
| 51 | |
| 52 | return do_jffs2_getxattr(inode, JFFS2_XPREFIX_SECURITY, name, buffer, size); |
| 53 | } |
| 54 | |
| 55 | static int jffs2_security_setxattr(struct inode *inode, const char *name, const void *buffer, |
| 56 | size_t size, int flags) |
| 57 | { |
| 58 | if (!strcmp(name, "")) |
| 59 | return -EINVAL; |
| 60 | |
| 61 | return do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, name, buffer, size, flags); |
| 62 | } |
| 63 | |
| 64 | static size_t jffs2_security_listxattr(struct inode *inode, char *list, size_t list_size, |
| 65 | const char *name, size_t name_len) |
| 66 | { |
| 67 | size_t retlen = XATTR_SECURITY_PREFIX_LEN + name_len + 1; |
| 68 | |
| 69 | if (list && retlen <= list_size) { |
| 70 | strcpy(list, XATTR_SECURITY_PREFIX); |
| 71 | strcpy(list + XATTR_SECURITY_PREFIX_LEN, name); |
| 72 | } |
| 73 | |
| 74 | return retlen; |
| 75 | } |
| 76 | |
| 77 | struct xattr_handler jffs2_security_xattr_handler = { |
| 78 | .prefix = XATTR_SECURITY_PREFIX, |
| 79 | .list = jffs2_security_listxattr, |
| 80 | .set = jffs2_security_setxattr, |
| 81 | .get = jffs2_security_getxattr |
| 82 | }; |