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  B   ˆl–ß=¿JÅ!¶e8 EpÜ TÅ£¿„^ß_†I|¥+a–Ðz¾””ÔD¨ 	Å ÕÀ·q¶”Å£Ã .4    /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * Landlock - User space API
 *
 * Copyright Â© 2017-2020 MickaÃ«l SalaÃ¼n <mic@digikod.net>
 * Copyright Â© 2018-2020 ANSSI
 */

#ifndef _LINUX_LANDLOCK_H
#define _LINUX_LANDLOCK_H

#include <linux/types.h>

/**
 * struct landlock_ruleset_attr - Ruleset definition.
 *
 * Argument of sys_landlock_create_ruleset().
 *
 * This structure defines a set of *handled access rights*, a set of actions on
 * different object types, which should be denied by default when the ruleset is
 * enacted.  Vice versa, access rights that are not specifically listed here are
 * not going to be denied by this ruleset when it is enacted.
 *
 * For historical reasons, the %LANDLOCK_ACCESS_FS_REFER right is always denied
 * by default, even when its bit is not set in @handled_access_fs.  In order to
 * add new rules with this access right, the bit must still be set explicitly
 * (cf. `Filesystem flags`_).
 *
 * The explicit listing of *handled access rights* is required for backwards
 * compatibility reasons.  In most use cases, processes that use Landlock will
 * *handle* a wide range or all access rights that they know about at build time
 * (and that they have tested with a kernel that supported them all).
 *
 * This structure can grow in future Landlock versions.
 */
struct landlock_ruleset_attr {
	/**
	 * @handled_access_fs: Bitmask of handled filesystem actions
	 * (cf. `Filesystem flags`_).
	 */
	__u64 handled_access_fs;
	/**
	 * @handled_access_net: Bitmask of handled network actions (cf. `Network
	 * flags`_).
	 */
	__u64 handled_access_net;
	/**
	 * @scoped: Bitmask of scopes (cf. `Scope flags`_)
	 * restricting a Landlock domain from accessing outside
	 * resources (e.g. IPCs).
	 */
	__u64 scoped;
};

/*
 * sys_landlock_create_ruleset() flags:
 *
 * - %LANDLOCK_CREATE_RULESET_VERSION: Get the highest supported Landlock ABI
 *   version.
 * - %LANDLOCK_CREATE_RULESET_ERRATA: Get a bitmask of fixed issues.
 */
/* clang-format off */
#define LANDLOCK_CREATE_RULESET_VERSION			(1U << 0)
#define LANDLOCK_CREATE_RULESET_ERRATA			(1U << 1)
/* clang-format on */

/**
 * enum landlock_rule_type - Landlock rule type
 *
 * Argument of sys_landlock_add_rule().
 */
enum landlock_rule_type {
	/**
	 * @LANDLOCK_RULE_PATH_BENEATH: Type of a &struct
	 * landlock_path_beneath_attr .
	 */
	LANDLOCK_RULE_PATH_BENEATH = 1,
	/**
	 * @LANDLOCK_RULE_NET_PORT: Type of a &struct
	 * landlock_net_port_attr .
	 */
	LANDLOCK_RULE_NET_PORT,
};

/**
 * struct landlock_path_beneath_attr - Path hierarchy definition
 *
 * Argument of sys_landlock_add_rule().
 */
struct landlock_path_beneath_attr {
	/**
	 * @allowed_access: Bitmask of allowed actions for this file hierarchy
	 * (cf. `Filesystem flags`_).
	 */
	__u64 allowed_access;
	/**
	 * @parent_fd: File descriptor, preferably opened with ``O_PATH``,
	 * which identifies the parent directory of a file hierarchy, or just a
	 * file.
	 */
	__s32 parent_fd;
	/*
	 * This struct is packed to avoid trailing reserved members.
	 * Cf. security/landlock/syscalls.c:build_check_abi()
	 */
} __attribute__((packed));

/**
 * struct landlock_net_port_attr - Network port definition
 *
 * Argument of sys_landlock_add_rule().
 */
struct landlock_net_port_attr {
	/**
	 * @allowed_access: Bitmask of allowed network actions for a port
	 * (cf. `Network flags`_).
	 */
	__u64 allowed_access;
	/**
	 * @port: Network port in host endianness.
	 *
	 * It should be noted that port 0 passed to :manpage:`bind(2)` will bind
	 * to an available port from the ephemeral port range.  This can be
	 * configured with the ``/proc/sys/net/ipv4/ip_local_port_range`` sysctl
	 * (also used for IPv6).
	 *
	 * A Landlock rule with port 0 and the ``LANDLOCK_ACCESS_NET_BIND_TCP``
	 * right means that requesting to bind on port 0 is allowed and it will
	 * automatically translate to binding on the related port range.
	 */
	__u64 port;
};

/**
 * DOC: fs_access
 *
 * A set of actions on kernel objects may be