fs/jffs2/xattr_user.c

   1 /*
   2  * JFFS2 -- Journalling Flash File System, Version 2.
   3  *
   4  * Copyright (C) 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 #include <linux/kernel.h>
  12 #include <linux/fs.h>
  13 #include <linux/jffs2.h>
  14 #include <linux/xattr.h>
  15 #include <linux/mtd/mtd.h>
  16 #include "nodelist.h"
  17
  18 static int jffs2_user_getxattr(struct inode *inode, const char *name,
  19                                void *buffer, size_t size)
  20 {
  21         if (!strcmp(name, ""))
  22                 return -EINVAL;
  23         return do_jffs2_getxattr(inode, JFFS2_XPREFIX_USER, name, buffer, size);
  24 }
  25
  26 static int jffs2_user_setxattr(struct inode *inode, const char *name, const void *buffer,
  27                                size_t size, int flags)
  28 {
  29         if (!strcmp(name, ""))
  30                 return -EINVAL;
  31         return do_jffs2_setxattr(inode, JFFS2_XPREFIX_USER, name, buffer, size, flags);
  32 }
  33
  34 static size_t jffs2_user_listxattr(struct inode *inode, char *list, size_t list_size,
  35                                    const char *name, size_t name_len)
  36 {
  37         size_t retlen = XATTR_USER_PREFIX_LEN + name_len + 1;
  38
  39         if (list && retlen <= list_size) {
  40                 strcpy(list, XATTR_USER_PREFIX);
  41                 strcpy(list + XATTR_USER_PREFIX_LEN, name);
  42         }
  43
  44         return retlen;
  45 }
  46
  47 struct xattr_handler jffs2_user_xattr_handler = {
  48         .prefix = XATTR_USER_PREFIX,
  49         .list = jffs2_user_listxattr,
  50         .set = jffs2_user_setxattr,
  51         .get = jffs2_user_getxattr
  52 };