LXR linux/fs/ext2/xattr

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * linux/fs/ext2/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 "ext2.h"
  10#include "xattr.h"
  11
  12static bool
  13ext2_xattr_trusted_list(struct dentry *dentry)
  14{
  15        return capable(CAP_SYS_ADMIN);
  16}
  17
  18static int
  19ext2_xattr_trusted_get(const struct xattr_handler *handler,
  20                       struct dentry *unused, struct inode *inode,
  21                       const char *name, void *buffer, size_t size)
  22{
  23        return ext2_xattr_get(inode, EXT2_XATTR_INDEX_TRUSTED, name,
  24                              buffer, size);
  25}
  26
  27static int
  28ext2_xattr_trusted_set(const struct xattr_handler *handler,
  29                       struct user_namespace *mnt_userns,
  30                       struct dentry *unused, struct inode *inode,
  31                       const char *name, const void *value,
  32                       size_t size, int flags)
  33{
  34        return ext2_xattr_set(inode, EXT2_XATTR_INDEX_TRUSTED, name,
  35                              value, size, flags);
  36}
  37
  38const struct xattr_handler ext2_xattr_trusted_handler = {
  39        .prefix = XATTR_TRUSTED_PREFIX,
  40        .list   = ext2_xattr_trusted_list,
  41        .get    = ext2_xattr_trusted_get,
  42        .set    = ext2_xattr_trusted_set,
  43};
  44