wireguard: uapi: generate header with ynl-gen

Use ynl-gen to generate the UAPI header for WireGuard.

The cosmetic changes in this patch confirms that the spec is aligned
with the implementation. By using the generated version, it ensures
that they stay in sync.

Changes in the generated header:
* Trivial header guard rename.
* Trivial white space changes.
* Trivial comment changes.
* Precompute bitflags in ynl-gen (see [1]).
* Drop __*_F_ALL constants (see [1]).

[1] https://lore.kernel.org/r/20251014123201.6ecfd146@kernel.org/

No behavioural changes intended.

Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

Author: Asbjørn Sloth Tønnesen

drivers/net/wireguard/netlink.c

@@ -26,7 +26,7 @@ static const struct nla_policy device_policy[WGDEVICE_A_MAX + 1] = {
 	[WGDEVICE_A_IFNAME]		= { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
 	[WGDEVICE_A_PRIVATE_KEY]	= NLA_POLICY_EXACT_LEN(WG_KEY_LEN),
 	[WGDEVICE_A_PUBLIC_KEY]		= NLA_POLICY_EXACT_LEN(WG_KEY_LEN),
-	[WGDEVICE_A_FLAGS]		= NLA_POLICY_MASK(NLA_U32, __WGDEVICE_F_ALL),
+	[WGDEVICE_A_FLAGS]		= NLA_POLICY_MASK(NLA_U32, 0x1),
 	[WGDEVICE_A_LISTEN_PORT]	= { .type = NLA_U16 },
 	[WGDEVICE_A_FWMARK]		= { .type = NLA_U32 },
 	[WGDEVICE_A_PEERS]		= NLA_POLICY_NESTED_ARRAY(peer_policy),
@@ -35,7 +35,7 @@ static const struct nla_policy device_policy[WGDEVICE_A_MAX + 1] = {
 static const struct nla_policy peer_policy[WGPEER_A_MAX + 1] = {
 	[WGPEER_A_PUBLIC_KEY]				= NLA_POLICY_EXACT_LEN(WG_KEY_LEN),
 	[WGPEER_A_PRESHARED_KEY]			= NLA_POLICY_EXACT_LEN(WG_KEY_LEN),
-	[WGPEER_A_FLAGS]				= NLA_POLICY_MASK(NLA_U32, __WGPEER_F_ALL),
+	[WGPEER_A_FLAGS]				= NLA_POLICY_MASK(NLA_U32, 0x7),
 	[WGPEER_A_ENDPOINT]				= NLA_POLICY_MIN_LEN(sizeof(struct sockaddr)),
 	[WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL]	= { .type = NLA_U16 },
 	[WGPEER_A_LAST_HANDSHAKE_TIME]			= NLA_POLICY_EXACT_LEN(sizeof(struct __kernel_timespec)),
@@ -49,7 +49,7 @@ static const struct nla_policy allowedip_policy[WGALLOWEDIP_A_MAX + 1] = {
 	[WGALLOWEDIP_A_FAMILY]		= { .type = NLA_U16 },
 	[WGALLOWEDIP_A_IPADDR]		= NLA_POLICY_MIN_LEN(sizeof(struct in_addr)),
 	[WGALLOWEDIP_A_CIDR_MASK]	= { .type = NLA_U8 },
-	[WGALLOWEDIP_A_FLAGS]		= NLA_POLICY_MASK(NLA_U32, __WGALLOWEDIP_F_ALL),
+	[WGALLOWEDIP_A_FLAGS]		= NLA_POLICY_MASK(NLA_U32, 0x1),
 };
 
 static struct wg_device *lookup_interface(struct nlattr **attrs,

include/uapi/linux/wireguard.h

@@ -1,32 +1,29 @@
-/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR MIT */
-/*
- * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- */
+/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
+/* Do not edit directly, auto-generated from: */
+/*	Documentation/netlink/specs/wireguard.yaml */
+/* YNL-GEN uapi header */
+/* To regenerate run: tools/net/ynl/ynl-regen.sh */
 
-#ifndef _WG_UAPI_WIREGUARD_H
-#define _WG_UAPI_WIREGUARD_H
+#ifndef _UAPI_LINUX_WIREGUARD_H
+#define _UAPI_LINUX_WIREGUARD_H
 
-#define WG_GENL_NAME "wireguard"
-#define WG_GENL_VERSION 1
+#define WG_GENL_NAME	"wireguard"
+#define WG_GENL_VERSION	1
 
-#define WG_KEY_LEN 32
+#define WG_KEY_LEN	32
 
 enum wgdevice_flag {
-	WGDEVICE_F_REPLACE_PEERS = 1U << 0,
-	__WGDEVICE_F_ALL = WGDEVICE_F_REPLACE_PEERS
+	WGDEVICE_F_REPLACE_PEERS = 1,
 };
 
 enum wgpeer_flag {
-	WGPEER_F_REMOVE_ME = 1U << 0,
-	WGPEER_F_REPLACE_ALLOWEDIPS = 1U << 1,
-	WGPEER_F_UPDATE_ONLY = 1U << 2,
-	__WGPEER_F_ALL = WGPEER_F_REMOVE_ME | WGPEER_F_REPLACE_ALLOWEDIPS |
-			 WGPEER_F_UPDATE_ONLY
+	WGPEER_F_REMOVE_ME = 1,
+	WGPEER_F_REPLACE_ALLOWEDIPS = 2,
+	WGPEER_F_UPDATE_ONLY = 4,
 };
 
 enum wgallowedip_flag {
-	WGALLOWEDIP_F_REMOVE_ME = 1U << 0,
-	__WGALLOWEDIP_F_ALL = WGALLOWEDIP_F_REMOVE_ME
+	WGALLOWEDIP_F_REMOVE_ME = 1,
 };
 
 enum wgdevice_attribute {
@@ -39,6 +36,7 @@ enum wgdevice_attribute {
 	WGDEVICE_A_LISTEN_PORT,
 	WGDEVICE_A_FWMARK,
 	WGDEVICE_A_PEERS,
+
 	__WGDEVICE_A_LAST
 };
 #define WGDEVICE_A_MAX (__WGDEVICE_A_LAST - 1)
@@ -55,6 +53,7 @@ enum wgpeer_attribute {
 	WGPEER_A_TX_BYTES,
 	WGPEER_A_ALLOWEDIPS,
 	WGPEER_A_PROTOCOL_VERSION,
+
 	__WGPEER_A_LAST
 };
 #define WGPEER_A_MAX (__WGPEER_A_LAST - 1)
@@ -65,6 +64,7 @@ enum wgallowedip_attribute {
 	WGALLOWEDIP_A_IPADDR,
 	WGALLOWEDIP_A_CIDR_MASK,
 	WGALLOWEDIP_A_FLAGS,
+
 	__WGALLOWEDIP_A_LAST
 };
 #define WGALLOWEDIP_A_MAX (__WGALLOWEDIP_A_LAST - 1)
@@ -77,4 +77,4 @@ enum wg_cmd {
 };
 #define WG_CMD_MAX (__WG_CMD_MAX - 1)
 
-#endif /* _WG_UAPI_WIREGUARD_H */
+#endif /* _UAPI_LINUX_WIREGUARD_H */