1652ecc20SKaiGai Kohei /* 2652ecc20SKaiGai Kohei * JFFS2 -- Journalling Flash File System, Version 2. 3aa98d7cfSKaiGai Kohei * 4c00c310eSDavid Woodhouse * Copyright © 2006 NEC Corporation 5aa98d7cfSKaiGai Kohei * 6652ecc20SKaiGai Kohei * Created by KaiGai Kohei <kaigai@ak.jp.nec.com> 7652ecc20SKaiGai Kohei * 8652ecc20SKaiGai Kohei * For licensing information, see the file 'LICENCE' in this directory. 9652ecc20SKaiGai Kohei * 10652ecc20SKaiGai Kohei */ 11c00c310eSDavid Woodhouse 12aa98d7cfSKaiGai Kohei #include <linux/kernel.h> 13aa98d7cfSKaiGai Kohei #include <linux/slab.h> 14aa98d7cfSKaiGai Kohei #include <linux/fs.h> 15aa98d7cfSKaiGai Kohei #include <linux/time.h> 16aa98d7cfSKaiGai Kohei #include <linux/pagemap.h> 17aa98d7cfSKaiGai Kohei #include <linux/highmem.h> 18aa98d7cfSKaiGai Kohei #include <linux/crc32.h> 19aa98d7cfSKaiGai Kohei #include <linux/jffs2.h> 20aa98d7cfSKaiGai Kohei #include <linux/xattr.h> 21aa98d7cfSKaiGai Kohei #include <linux/mtd/mtd.h> 22aa98d7cfSKaiGai Kohei #include <linux/security.h> 23aa98d7cfSKaiGai Kohei #include "nodelist.h" 24aa98d7cfSKaiGai Kohei 25aa98d7cfSKaiGai Kohei /* ---- Initial Security Label Attachment -------------- */ 262a7dba39SEric Paris int jffs2_init_security(struct inode *inode, struct inode *dir, 272a7dba39SEric Paris const struct qstr *qstr) 28aa98d7cfSKaiGai Kohei { 29aa98d7cfSKaiGai Kohei int rc; 30aa98d7cfSKaiGai Kohei size_t len; 31aa98d7cfSKaiGai Kohei void *value; 32aa98d7cfSKaiGai Kohei char *name; 33aa98d7cfSKaiGai Kohei 342a7dba39SEric Paris rc = security_inode_init_security(inode, dir, qstr, &name, &value, &len); 35aa98d7cfSKaiGai Kohei if (rc) { 36aa98d7cfSKaiGai Kohei if (rc == -EOPNOTSUPP) 37aa98d7cfSKaiGai Kohei return 0; 38aa98d7cfSKaiGai Kohei return rc; 39aa98d7cfSKaiGai Kohei } 40aa98d7cfSKaiGai Kohei rc = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, name, value, len, 0); 41aa98d7cfSKaiGai Kohei 42aa98d7cfSKaiGai Kohei kfree(name); 43aa98d7cfSKaiGai Kohei kfree(value); 44aa98d7cfSKaiGai Kohei return rc; 45aa98d7cfSKaiGai Kohei } 46aa98d7cfSKaiGai Kohei 47aa98d7cfSKaiGai Kohei /* ---- XATTR Handler for "security.*" ----------------- */ 48431547b3SChristoph Hellwig static int jffs2_security_getxattr(struct dentry *dentry, const char *name, 49431547b3SChristoph Hellwig void *buffer, size_t size, int type) 50aa98d7cfSKaiGai Kohei { 51aa98d7cfSKaiGai Kohei if (!strcmp(name, "")) 52aa98d7cfSKaiGai Kohei return -EINVAL; 53aa98d7cfSKaiGai Kohei 54431547b3SChristoph Hellwig return do_jffs2_getxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY, 55431547b3SChristoph Hellwig name, buffer, size); 56aa98d7cfSKaiGai Kohei } 57aa98d7cfSKaiGai Kohei 58431547b3SChristoph Hellwig static int jffs2_security_setxattr(struct dentry *dentry, const char *name, 59431547b3SChristoph Hellwig const void *buffer, size_t size, int flags, int type) 60aa98d7cfSKaiGai Kohei { 61aa98d7cfSKaiGai Kohei if (!strcmp(name, "")) 62aa98d7cfSKaiGai Kohei return -EINVAL; 63aa98d7cfSKaiGai Kohei 64431547b3SChristoph Hellwig return do_jffs2_setxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY, 65431547b3SChristoph Hellwig name, buffer, size, flags); 66aa98d7cfSKaiGai Kohei } 67aa98d7cfSKaiGai Kohei 68431547b3SChristoph Hellwig static size_t jffs2_security_listxattr(struct dentry *dentry, char *list, 69431547b3SChristoph Hellwig size_t list_size, const char *name, size_t name_len, int type) 70aa98d7cfSKaiGai Kohei { 71aa98d7cfSKaiGai Kohei size_t retlen = XATTR_SECURITY_PREFIX_LEN + name_len + 1; 72aa98d7cfSKaiGai Kohei 73aa98d7cfSKaiGai Kohei if (list && retlen <= list_size) { 74aa98d7cfSKaiGai Kohei strcpy(list, XATTR_SECURITY_PREFIX); 75aa98d7cfSKaiGai Kohei strcpy(list + XATTR_SECURITY_PREFIX_LEN, name); 76aa98d7cfSKaiGai Kohei } 77aa98d7cfSKaiGai Kohei 78aa98d7cfSKaiGai Kohei return retlen; 79aa98d7cfSKaiGai Kohei } 80aa98d7cfSKaiGai Kohei 81365f0cb9SStephen Hemminger const struct xattr_handler jffs2_security_xattr_handler = { 82aa98d7cfSKaiGai Kohei .prefix = XATTR_SECURITY_PREFIX, 83aa98d7cfSKaiGai Kohei .list = jffs2_security_listxattr, 84aa98d7cfSKaiGai Kohei .set = jffs2_security_setxattr, 85aa98d7cfSKaiGai Kohei .get = jffs2_security_getxattr 86aa98d7cfSKaiGai Kohei }; 87