projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| aa98d7cf KK |
1 | /*-------------------------------------------------------------------------* |
| 2 | * File: fs/jffs2/security.c | |
| 3 | * Security Labels support on JFFS2 FileSystem | |
| 4 | * | |
| 5 | * Implemented by KaiGai Kohei <kaigai@ak.jp.nec.com> | |
| 6 | * Copyright (C) 2006 NEC Corporation | |
| 7 | * | |
| 8 | * For licensing information, see the file 'LICENCE' in the jffs2 directory. | |
| 9 | *-------------------------------------------------------------------------*/ | |
| 10 | ||
| 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 | }; |