fs/jffs2/xattr_trusted.c

   1 /*-------------------------------------------------------------------------*
   2  *  File: fs/jffs2/xattr_trusted.c
   3  *  XATTR support on JFFS2 FileSystem
   4  *
   5  *  Implemented by KaiGai Kohei <kaigai@ak.jp.nec.com>
   6  *  Copyright (C) 2006 NEC Corporation
   7  *
   8  *  For licensing information, see the file 'LICENCE' in the jffs2 directory.
   9  *-------------------------------------------------------------------------*/
  10 #include <linux/kernel.h>
  11 #include <linux/fs.h>
  12 #include <linux/jffs2.h>
  13 #include <linux/xattr.h>
  14 #include <linux/mtd/mtd.h>
  15 #include "nodelist.h"
  16
  17 static int jffs2_trusted_getxattr(struct inode *inode, const char *name,
  18                                   void *buffer, size_t size)
  19 {
  20         if (!strcmp(name, ""))
  21                 return -EINVAL;
  22         return do_jffs2_getxattr(inode, JFFS2_XPREFIX_TRUSTED, name, buffer, size);
  23 }
  24
  25 static int jffs2_trusted_setxattr(struct inode *inode, const char *name, const void *buffer,
  26                                   size_t size, int flags)
  27 {
  28         if (!strcmp(name, ""))
  29                 return -EINVAL;
  30         return do_jffs2_setxattr(inode, JFFS2_XPREFIX_TRUSTED, name, buffer, size, flags);
  31 }
  32
  33 static size_t jffs2_trusted_listxattr(struct inode *inode, char *list, size_t list_size,
  34                                       const char *name, size_t name_len)
  35 {
  36         size_t retlen = XATTR_TRUSTED_PREFIX_LEN + name_len + 1;
  37
  38         if (list && retlen<=list_size) {
  39                 strcpy(list, XATTR_TRUSTED_PREFIX);
  40                 strcpy(list + XATTR_TRUSTED_PREFIX_LEN, name);
  41         }
  42
  43         return retlen;
  44 }
  45
  46 struct xattr_handler jffs2_trusted_xattr_handler = {
  47         .prefix = XATTR_TRUSTED_PREFIX,
  48         .list = jffs2_trusted_listxattr,
  49         .set = jffs2_trusted_setxattr,
  50         .get = jffs2_trusted_getxattr
  51 };