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/* SPDX-License-Identifier: GPL-2.0 */
/*
* SafeSetID Linux Security Module
*
* Author: Micah Morton <mortonm@chromium.org>
*
* Copyright (C) 2018 The Chromium OS Authors.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2, as
* published by the Free Software Foundation.
*
*/
#ifndef _SAFESETID_H
#define _SAFESETID_H
#include <linux/types.h>
#include <linux/uidgid.h>
#include <linux/hashtable.h>
/* Flag indicating whether initialization completed */
extern int safesetid_initialized;
/* Function type. */
enum safesetid_whitelist_file_write_type {
SAFESETID_WHITELIST_ADD, /* Add whitelist policy. */
SAFESETID_WHITELIST_FLUSH, /* Flush whitelist policies. */
};
enum sid_policy_type {
SIDPOL_DEFAULT, /* source ID is unaffected by policy */
SIDPOL_CONSTRAINED, /* source ID is affected by policy */
SIDPOL_ALLOWED /* target ID explicitly allowed */
};
/*
* Hash table entry to store safesetid policy signifying that 'src_uid'
* can setid to 'dst_uid'.
*/
struct entry {
struct hlist_node next;
struct hlist_node dlist; /* for deletion cleanup */
kuid_t src_uid;
kuid_t dst_uid;
};
/* Add entry to safesetid whitelist to allow 'parent' to setid to 'child'. */
int add_safesetid_whitelist_entry(kuid_t parent, kuid_t child);
void flush_safesetid_whitelist_entries(void);
#endif /* _SAFESETID_H */
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