linux/fs/jffs2/xattr_trusted.c
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   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
  19static int jffs2_trusted_getxattr(struct dentry *dentry, const char *name,
  20                void *buffer, size_t size, int type)
  21{
  22        if (!strcmp(name, ""))
  23                return -EINVAL;
  24        return do_jffs2_getxattr(dentry->d_inode, JFFS2_XPREFIX_TRUSTED,
  25                                 name, buffer, size);
  26}
  27
  28static int jffs2_trusted_setxattr(struct dentry *dentry, const char *name,
  29                const void *buffer, size_t size, int flags, int type)
  30{
  31        if (!strcmp(name, ""))
  32                return -EINVAL;
  33        return do_jffs2_setxattr(dentry->d_inode, JFFS2_XPREFIX_TRUSTED,
  34                                 name, buffer, size, flags);
  35}
  36
  37static size_t jffs2_trusted_listxattr(struct dentry *dentry, char *list,
  38                size_t list_size, const char *name, size_t name_len, int type)
  39{
  40        size_t retlen = XATTR_TRUSTED_PREFIX_LEN + name_len + 1;
  41
  42        if (list && retlen<=list_size) {
  43                strcpy(list, XATTR_TRUSTED_PREFIX);
  44                strcpy(list + XATTR_TRUSTED_PREFIX_LEN, name);
  45        }
  46
  47        return retlen;
  48}
  49
  50const struct xattr_handler jffs2_trusted_xattr_handler = {
  51        .prefix = XATTR_TRUSTED_PREFIX,
  52        .list = jffs2_trusted_listxattr,
  53        .set = jffs2_trusted_setxattr,
  54        .get = jffs2_trusted_getxattr
  55};
  56
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