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 }; 63