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_user.c (1273B)

      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};