LXR linux/fs/ext2/xattr

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * linux/fs/ext2/xattr_user.c
   4 * Handler for extended user attributes.
   5 *
   6 * Copyright (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
   7 */
   8
   9#include <linux/init.h>
  10#include <linux/string.h>
  11#include "ext2.h"
  12#include "xattr.h"
  13
  14static bool
  15ext2_xattr_user_list(struct dentry *dentry)
  16{
  17        return test_opt(dentry->d_sb, XATTR_USER);
  18}
  19
  20static int
  21ext2_xattr_user_get(const struct xattr_handler *handler,
  22                    struct dentry *unused, struct inode *inode,
  23                    const char *name, void *buffer, size_t size)
  24{
  25        if (!test_opt(inode->i_sb, XATTR_USER))
  26                return -EOPNOTSUPP;
  27        return ext2_xattr_get(inode, EXT2_XATTR_INDEX_USER,
  28                              name, buffer, size);
  29}
  30
  31static int
  32ext2_xattr_user_set(const struct xattr_handler *handler,
  33                    struct user_namespace *mnt_userns,
  34                    struct dentry *unused, struct inode *inode,
  35                    const char *name, const void *value,
  36                    size_t size, int flags)
  37{
  38        if (!test_opt(inode->i_sb, XATTR_USER))
  39                return -EOPNOTSUPP;
  40
  41        return ext2_xattr_set(inode, EXT2_XATTR_INDEX_USER,
  42                              name, value, size, flags);
  43}
  44
  45const struct xattr_handler ext2_xattr_user_handler = {
  46        .prefix = XATTR_USER_PREFIX,
  47        .list   = ext2_xattr_user_list,
  48        .get    = ext2_xattr_user_get,
  49        .set    = ext2_xattr_user_set,
  50};
  51