LXR linux/fs/ext4/xattr

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * linux/fs/ext4/xattr_trusted.c
   4 * Handler for trusted extended attributes.
   5 *
   6 * Copyright (C) 2003 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
   7 */
   8
   9#include <linux/string.h>
  10#include <linux/capability.h>
  11#include <linux/fs.h>
  12#include "ext4_jbd2.h"
  13#include "ext4.h"
  14#include "xattr.h"
  15
  16static bool
  17ext4_xattr_trusted_list(struct dentry *dentry)
  18{
  19        return capable(CAP_SYS_ADMIN);
  20}
  21
  22static int
  23ext4_xattr_trusted_get(const struct xattr_handler *handler,
  24                       struct dentry *unused, struct inode *inode,
  25                       const char *name, void *buffer, size_t size)
  26{
  27        return ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED,
  28                              name, buffer, size);
  29}
  30
  31static int
  32ext4_xattr_trusted_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        return ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED,
  39                              name, value, size, flags);
  40}
  41
  42const struct xattr_handler ext4_xattr_trusted_handler = {
  43        .prefix = XATTR_TRUSTED_PREFIX,
  44        .list   = ext4_xattr_trusted_list,
  45        .get    = ext4_xattr_trusted_get,
  46        .set    = ext4_xattr_trusted_set,
  47};
  48