cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

lsm.h (1734B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * SafeSetID Linux Security Module
      4 *
      5 * Author: Micah Morton <mortonm@chromium.org>
      6 *
      7 * Copyright (C) 2018 The Chromium OS Authors.
      8 *
      9 * This program is free software; you can redistribute it and/or modify
     10 * it under the terms of the GNU General Public License version 2, as
     11 * published by the Free Software Foundation.
     12 *
     13 */
     14#ifndef _SAFESETID_H
     15#define _SAFESETID_H
     16
     17#include <linux/types.h>
     18#include <linux/uidgid.h>
     19#include <linux/hashtable.h>
     20
     21/* Flag indicating whether initialization completed */
     22extern int safesetid_initialized __initdata;
     23
     24enum sid_policy_type {
     25	SIDPOL_DEFAULT, /* source ID is unaffected by policy */
     26	SIDPOL_CONSTRAINED, /* source ID is affected by policy */
     27	SIDPOL_ALLOWED /* target ID explicitly allowed */
     28};
     29
     30typedef union {
     31	kuid_t uid;
     32	kgid_t gid;
     33} kid_t;
     34
     35enum setid_type {
     36	UID,
     37	GID
     38};
     39
     40/*
     41 * Hash table entry to store safesetid policy signifying that 'src_id'
     42 * can set*id to 'dst_id'.
     43 */
     44struct setid_rule {
     45	struct hlist_node next;
     46	kid_t src_id;
     47	kid_t dst_id;
     48
     49	/* Flag to signal if rule is for UID's or GID's */
     50	enum setid_type type;
     51};
     52
     53#define SETID_HASH_BITS 8 /* 256 buckets in hash table */
     54
     55/* Extension of INVALID_UID/INVALID_GID for kid_t type */
     56#define INVALID_ID (kid_t){.uid = INVALID_UID}
     57
     58struct setid_ruleset {
     59	DECLARE_HASHTABLE(rules, SETID_HASH_BITS);
     60	char *policy_str;
     61	struct rcu_head rcu;
     62
     63	//Flag to signal if ruleset is for UID's or GID's
     64	enum setid_type type;
     65};
     66
     67enum sid_policy_type _setid_policy_lookup(struct setid_ruleset *policy,
     68		kid_t src, kid_t dst);
     69
     70extern struct setid_ruleset __rcu *safesetid_setuid_rules;
     71extern struct setid_ruleset __rcu *safesetid_setgid_rules;
     72
     73#endif /* _SAFESETID_H */