Line data    Source code

       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             : 
      16             : static bool
      17           0 : ext4_xattr_trusted_list(struct dentry *dentry)
      18             : {
      19           0 :         return capable(CAP_SYS_ADMIN);
      20             : }
      21             : 
      22             : static int
      23           0 : ext4_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           0 :         return ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED,
      28             :                               name, buffer, size);
      29             : }
      30             : 
      31             : static int
      32           0 : ext4_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           0 :         return ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED,
      39             :                               name, value, size, flags);
      40             : }
      41             : 
      42             : const 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             : };