fs/jffs2/xattr_user.c

   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_user_getxattr(struct inode *inode, const char *name,
  20                                void *buffer, size_t size)
  21 {
  22         if (!strcmp(name, ""))
  23                 return -EINVAL;
  24         return do_jffs2_getxattr(inode, JFFS2_XPREFIX_USER, name, buffer, size);
  25 }
  26
  27 static int jffs2_user_setxattr(struct inode *inode, const char *name, const void *buffer,
  28                                size_t size, int flags)
  29 {
  30         if (!strcmp(name, ""))
  31                 return -EINVAL;
  32         return do_jffs2_setxattr(inode, JFFS2_XPREFIX_USER, name, buffer, size, flags);
  33 }
  34
  35 static size_t jffs2_user_listxattr(struct inode *inode, char *list, size_t list_size,
  36                                    const char *name, size_t name_len)
  37 {
  38         size_t retlen = XATTR_USER_PREFIX_LEN + name_len + 1;
  39
  40         if (list && retlen <= list_size) {
  41                 strcpy(list, XATTR_USER_PREFIX);
  42                 strcpy(list + XATTR_USER_PREFIX_LEN, name);
  43         }
  44
  45         return retlen;
  46 }
  47
  48 struct xattr_handler jffs2_user_xattr_handler = {
  49         .prefix = XATTR_USER_PREFIX,
  50         .list = jffs2_user_listxattr,
  51         .set = jffs2_user_setxattr,
  52         .get = jffs2_user_getxattr
  53 };