cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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xattr_trusted.c (1239B)

      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};