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 return do_jffs2_getxattr(d_inode(dentry), JFFS2_XPREFIX_TRUSTED, 24 name, buffer, size); 25 } 26 27 static int jffs2_trusted_setxattr(const struct xattr_handler *handler, 28 struct dentry *dentry, const char *name, 29 const void *buffer, size_t size, int flags) 30 { 31 return do_jffs2_setxattr(d_inode(dentry), JFFS2_XPREFIX_TRUSTED, 32 name, buffer, size, flags); 33 } 34 35 static size_t jffs2_trusted_listxattr(const struct xattr_handler *handler, 36 struct dentry *dentry, char *list, 37 size_t list_size, const char *name, 38 size_t name_len) 39 { 40 size_t retlen = XATTR_TRUSTED_PREFIX_LEN + name_len + 1; 41 42 if (!capable(CAP_SYS_ADMIN)) 43 return 0; 44 45 if (list && retlen<=list_size) { 46 strcpy(list, XATTR_TRUSTED_PREFIX); 47 strcpy(list + XATTR_TRUSTED_PREFIX_LEN, name); 48 } 49 50 return retlen; 51 } 52 53 const struct xattr_handler jffs2_trusted_xattr_handler = { 54 .prefix = XATTR_TRUSTED_PREFIX, 55 .list = jffs2_trusted_listxattr, 56 .set = jffs2_trusted_setxattr, 57 .get = jffs2_trusted_getxattr 58 }; 59