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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security.c (2034B)

      1/*
      2 * JFFS2 -- Journalling Flash File System, Version 2.
      3 *
      4 * Copyright © 2006  NEC Corporation
      5 *
      6 * Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
      7 *
      8 * For licensing information, see the file 'LICENCE' in this directory.
      9 *
     10 */
     11
     12#include <linux/kernel.h>
     13#include <linux/slab.h>
     14#include <linux/fs.h>
     15#include <linux/time.h>
     16#include <linux/pagemap.h>
     17#include <linux/highmem.h>
     18#include <linux/crc32.h>
     19#include <linux/jffs2.h>
     20#include <linux/xattr.h>
     21#include <linux/mtd/mtd.h>
     22#include <linux/security.h>
     23#include "nodelist.h"
     24
     25/* ---- Initial Security Label(s) Attachment callback --- */
     26static int jffs2_initxattrs(struct inode *inode,
     27			    const struct xattr *xattr_array, void *fs_info)
     28{
     29	const struct xattr *xattr;
     30	int err = 0;
     31
     32	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
     33		err = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY,
     34					xattr->name, xattr->value,
     35					xattr->value_len, 0);
     36		if (err < 0)
     37			break;
     38	}
     39	return err;
     40}
     41
     42/* ---- Initial Security Label(s) Attachment ----------- */
     43int jffs2_init_security(struct inode *inode, struct inode *dir,
     44			const struct qstr *qstr)
     45{
     46	return security_inode_init_security(inode, dir, qstr,
     47					    &jffs2_initxattrs, NULL);
     48}
     49
     50/* ---- XATTR Handler for "security.*" ----------------- */
     51static int jffs2_security_getxattr(const struct xattr_handler *handler,
     52				   struct dentry *unused, struct inode *inode,
     53				   const char *name, void *buffer, size_t size)
     54{
     55	return do_jffs2_getxattr(inode, JFFS2_XPREFIX_SECURITY,
     56				 name, buffer, size);
     57}
     58
     59static int jffs2_security_setxattr(const struct xattr_handler *handler,
     60				   struct user_namespace *mnt_userns,
     61				   struct dentry *unused, struct inode *inode,
     62				   const char *name, const void *buffer,
     63				   size_t size, int flags)
     64{
     65	return do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY,
     66				 name, buffer, size, flags);
     67}
     68
     69const struct xattr_handler jffs2_security_xattr_handler = {
     70	.prefix = XATTR_SECURITY_PREFIX,
     71	.set = jffs2_security_setxattr,
     72	.get = jffs2_security_getxattr
     73};