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/* Copyright 2022 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/*
* Landlock functions and constants.
*/
#ifndef _LANDLOCK_UTIL_H_
#define _LANDLOCK_UTIL_H_
#include <asm/unistd.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include "landlock.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifndef __NR_landlock_create_ruleset
#define __NR_landlock_create_ruleset 444
#endif
#ifndef __NR_landlock_add_rule
#define __NR_landlock_add_rule 445
#endif
#ifndef __NR_landlock_restrict_self
#define __NR_landlock_restrict_self 446
#endif
#define ACCESS_FS_ROUGHLY_READ ( \
LANDLOCK_ACCESS_FS_READ_FILE | \
LANDLOCK_ACCESS_FS_READ_DIR)
#define ACCESS_FS_ROUGHLY_READ_EXECUTE ( \
LANDLOCK_ACCESS_FS_EXECUTE | \
LANDLOCK_ACCESS_FS_READ_FILE | \
LANDLOCK_ACCESS_FS_READ_DIR)
#define ACCESS_FS_ROUGHLY_BASIC_WRITE ( \
LANDLOCK_ACCESS_FS_WRITE_FILE | \
LANDLOCK_ACCESS_FS_REMOVE_DIR | \
LANDLOCK_ACCESS_FS_REMOVE_FILE | \
LANDLOCK_ACCESS_FS_MAKE_DIR | \
LANDLOCK_ACCESS_FS_MAKE_REG)
#define ACCESS_FS_ROUGHLY_EDIT ( \
LANDLOCK_ACCESS_FS_WRITE_FILE | \
LANDLOCK_ACCESS_FS_REMOVE_DIR | \
LANDLOCK_ACCESS_FS_REMOVE_FILE)
#define ACCESS_FS_ROUGHLY_FULL_WRITE ( \
LANDLOCK_ACCESS_FS_WRITE_FILE | \
LANDLOCK_ACCESS_FS_REMOVE_DIR | \
LANDLOCK_ACCESS_FS_REMOVE_FILE | \
LANDLOCK_ACCESS_FS_MAKE_CHAR | \
LANDLOCK_ACCESS_FS_MAKE_DIR | \
LANDLOCK_ACCESS_FS_MAKE_REG | \
LANDLOCK_ACCESS_FS_MAKE_SOCK | \
LANDLOCK_ACCESS_FS_MAKE_FIFO | \
LANDLOCK_ACCESS_FS_MAKE_BLOCK | \
LANDLOCK_ACCESS_FS_MAKE_SYM)
#define ACCESS_FILE ( \
LANDLOCK_ACCESS_FS_EXECUTE | \
LANDLOCK_ACCESS_FS_WRITE_FILE | \
LANDLOCK_ACCESS_FS_READ_FILE)
#define HANDLED_ACCESS_TYPES (ACCESS_FS_ROUGHLY_READ_EXECUTE | \
ACCESS_FS_ROUGHLY_FULL_WRITE)
/*
* Performs Landlock create ruleset syscall.
*
* Returns the ruleset file descriptor on success, returns an error code
* otherwise.
*/
extern int landlock_create_ruleset(const struct
minijail_landlock_ruleset_attr *const attr,
const size_t size, const __u32 flags);
/* Performs Landlock add rule syscall. */
extern int landlock_add_rule(const int ruleset_fd,
const enum minijail_landlock_rule_type rule_type,
const void *const rule_attr, const __u32 flags);
/* Performs Landlock restrict self syscall. */
extern int landlock_restrict_self(const int ruleset_fd,
const __u32 flags);
/* Populates the landlock ruleset for a path and any needed paths beneath. */
extern bool populate_ruleset_internal(const char *const path,
const int ruleset_fd,
const uint64_t allowed_access);
#ifdef __cplusplus
}; /* extern "C" */
#endif
#endif /* _LANDLOCK_UTIL_H_ */
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