Merge branch 'doc-netlink-add-a-yaml-spec-for-team'

Hangbin Liu says:

====================
doc/netlink: add a YAML spec for team

Add a YAML spec for team. As we need to link two objects together to form
the team module, rename team to team_core for linking.
====================

Link: https://lore.kernel.org/r/20240401031004.1159713-1-liuhangbin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

7 files changed, 346 insertions, 127 deletions

diff --git a/Documentation/netlink/specs/team.yaml b/Documentation/netlink/specs/team.yaml
new file mode 100644
index 00000000000000..c13529e011c90a
--- /dev/null
+++ b/Documentation/netlink/specs/team.yaml
@@ -0,0 +1,204 @@
+# SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
+
+name: team
+
+protocol: genetlink-legacy
+
+doc: |
+  Network team device driver.
+
+c-family-name: team-genl-name
+c-version-name: team-genl-version
+kernel-policy: global
+uapi-header: linux/if_team.h
+
+definitions:
+  -
+    name: string-max-len
+    type: const
+    value: 32
+  -
+    name: genl-change-event-mc-grp-name
+    type: const
+    value: change_event
+
+attribute-sets:
+  -
+    name: team
+    doc:
+      The team nested layout of get/set msg looks like
+          [TEAM_ATTR_LIST_OPTION]
+              [TEAM_ATTR_ITEM_OPTION]
+                  [TEAM_ATTR_OPTION_*], ...
+              [TEAM_ATTR_ITEM_OPTION]
+                  [TEAM_ATTR_OPTION_*], ...
+              ...
+          [TEAM_ATTR_LIST_PORT]
+              [TEAM_ATTR_ITEM_PORT]
+                  [TEAM_ATTR_PORT_*], ...
+              [TEAM_ATTR_ITEM_PORT]
+                  [TEAM_ATTR_PORT_*], ...
+              ...
+    name-prefix: team-attr-
+    attributes:
+      -
+        name: unspec
+        type: unused
+        value: 0
+      -
+        name: team-ifindex
+        type: u32
+      -
+        name: list-option
+        type: nest
+        nested-attributes: item-option
+      -
+        name: list-port
+        type: nest
+        nested-attributes: item-port
+  -
+    name: item-option
+    name-prefix: team-attr-item-
+    attr-cnt-name: __team-attr-item-option-max
+    attr-max-name: team-attr-item-option-max
+    attributes:
+      -
+        name: option-unspec
+        type: unused
+        value: 0
+      -
+        name: option
+        type: nest
+        nested-attributes: attr-option
+  -
+    name: attr-option
+    name-prefix: team-attr-option-
+    attributes:
+      -
+        name: unspec
+        type: unused
+        value: 0
+      -
+        name: name
+        type: string
+        checks:
+          max-len: string-max-len
+          unterminated-ok: true
+      -
+        name: changed
+        type: flag
+      -
+        name: type
+        type: u8
+      -
+        name: data
+        type: binary
+      -
+        name: removed
+        type: flag
+      -
+        name: port-ifindex
+        type: u32
+        doc: for per-port options
+      -
+        name: array-index
+        type: u32
+        doc: for array options
+  -
+    name: item-port
+    name-prefix: team-attr-item-
+    attr-cnt-name: __team-attr-item-port-max
+    attr-max-name: team-attr-item-port-max
+    attributes:
+      -
+        name: port-unspec
+        type: unused
+        value: 0
+      -
+        name: port
+        type: nest
+        nested-attributes: attr-port
+  -
+    name: attr-port
+    name-prefix: team-attr-port-
+    attributes:
+      -
+        name: unspec
+        type: unused
+        value: 0
+      -
+        name: ifindex
+        type: u32
+      -
+        name: changed
+        type: flag
+      -
+        name: linkup
+        type: flag
+      -
+        name: speed
+        type: u32
+      -
+        name: duplex
+        type: u8
+      -
+        name: removed
+        type: flag
+
+operations:
+  list:
+    -
+      name: noop
+      doc: No operation
+      value: 0
+      attribute-set: team
+      dont-validate: [ strict ]
+
+      do:
+        # Actually it only reply the team netlink family
+        reply:
+          attributes:
+            - team-ifindex
+
+    -
+      name: options-set
+      doc: Set team options
+      attribute-set: team
+      dont-validate: [ strict ]
+      flags: [ admin-perm ]
+
+      do:
+        request: &option_attrs
+          attributes:
+            - team-ifindex
+            - list-option
+        reply: *option_attrs
+
+    -
+      name: options-get
+      doc: Get team options info
+      attribute-set: team
+      dont-validate: [ strict ]
+      flags: [ admin-perm ]
+
+      do:
+        request:
+          attributes:
+            - team-ifindex
+        reply: *option_attrs
+
+    -
+      name: port-list-get
+      doc: Get team ports info
+      attribute-set: team
+      dont-validate: [ strict ]
+      flags: [ admin-perm ]
+
+      do:
+        request:
+          attributes:
+            - team-ifindex
+        reply: &port_attrs
+          attributes:
+            - team-ifindex
+            - list-port
diff --git a/MAINTAINERS b/MAINTAINERS
index 6a233e1a3cf2e8..909c2c531d8eac 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -21665,6 +21665,7 @@ TEAM DRIVER
 M:	Jiri Pirko <jiri@resnulli.us>
 L:	netdev@vger.kernel.org
 S:	Supported
+F:	Documentation/netlink/specs/team.yaml
 F:	drivers/net/team/
 F:	include/linux/if_team.h
 F:	include/uapi/linux/if_team.h
diff --git a/drivers/net/team/Makefile b/drivers/net/team/Makefile
index f582d81a509119..7a5aa20d286b77 100644
--- a/drivers/net/team/Makefile
+++ b/drivers/net/team/Makefile
@@ -3,6 +3,7 @@
 # Makefile for the network team driver
 #
 
+team-y:= team_core.o team_nl.o
 obj-$(CONFIG_NET_TEAM) += team.o
 obj-$(CONFIG_NET_TEAM_MODE_BROADCAST) += team_mode_broadcast.o
 obj-$(CONFIG_NET_TEAM_MODE_ROUNDROBIN) += team_mode_roundrobin.o
diff --git a/drivers/net/team/team.c b/drivers/net/team/team_core.c
index 0a44bbdcfb7b9f..4e3c8d40495711 100644
--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team_core.c
@@ -27,6 +27,8 @@
 #include <net/sch_generic.h>
 #include <linux/if_team.h>
 
+#include "team_nl.h"
+
 #define DRV_NAME "team"
 
 
@@ -2254,28 +2256,7 @@ static struct rtnl_link_ops team_link_ops __read_mostly = {
 
 static struct genl_family team_nl_family;
 
-static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
-	[TEAM_ATTR_UNSPEC]			= { .type = NLA_UNSPEC, },
-	[TEAM_ATTR_TEAM_IFINDEX]		= { .type = NLA_U32 },
-	[TEAM_ATTR_LIST_OPTION]			= { .type = NLA_NESTED },
-	[TEAM_ATTR_LIST_PORT]			= { .type = NLA_NESTED },
-};
-
-static const struct nla_policy
-team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
-	[TEAM_ATTR_OPTION_UNSPEC]		= { .type = NLA_UNSPEC, },
-	[TEAM_ATTR_OPTION_NAME] = {
-		.type = NLA_STRING,
-		.len = TEAM_STRING_MAX_LEN,
-	},
-	[TEAM_ATTR_OPTION_CHANGED]		= { .type = NLA_FLAG },
-	[TEAM_ATTR_OPTION_TYPE]			= { .type = NLA_U8 },
-	[TEAM_ATTR_OPTION_DATA]			= { .type = NLA_BINARY },
-	[TEAM_ATTR_OPTION_PORT_IFINDEX]		= { .type = NLA_U32 },
-	[TEAM_ATTR_OPTION_ARRAY_INDEX]		= { .type = NLA_U32 },
-};
-
-static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
+int team_nl_noop_doit(struct sk_buff *skb, struct genl_info *info)
 {
 	struct sk_buff *msg;
 	void *hdr;
@@ -2513,7 +2494,7 @@ errout:
 	return err;
 }
 
-static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
+int team_nl_options_get_doit(struct sk_buff *skb, struct genl_info *info)
 {
 	struct team *team;
 	struct team_option_inst *opt_inst;
@@ -2538,7 +2519,7 @@ static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
 static int team_nl_send_event_options_get(struct team *team,
 					  struct list_head *sel_opt_inst_list);
 
-static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
+int team_nl_options_set_doit(struct sk_buff *skb, struct genl_info *info)
 {
 	struct team *team;
 	int err = 0;
@@ -2579,7 +2560,7 @@ static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
 		err = nla_parse_nested_deprecated(opt_attrs,
 						  TEAM_ATTR_OPTION_MAX,
 						  nl_option,
-						  team_nl_option_policy,
+						  team_attr_option_nl_policy,
 						  info->extack);
 		if (err)
 			goto team_put;
@@ -2802,8 +2783,8 @@ errout:
 	return err;
 }
 
-static int team_nl_cmd_port_list_get(struct sk_buff *skb,
-				     struct genl_info *info)
+int team_nl_port_list_get_doit(struct sk_buff *skb,
+			       struct genl_info *info)
 {
 	struct team *team;
 	int err;
@@ -2820,32 +2801,6 @@ static int team_nl_cmd_port_list_get(struct sk_buff *skb,
 	return err;
 }
 
-static const struct genl_small_ops team_nl_ops[] = {
-	{
-		.cmd = TEAM_CMD_NOOP,
-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
-		.doit = team_nl_cmd_noop,
-	},
-	{
-		.cmd = TEAM_CMD_OPTIONS_SET,
-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
-		.doit = team_nl_cmd_options_set,
-		.flags = GENL_ADMIN_PERM,
-	},
-	{
-		.cmd = TEAM_CMD_OPTIONS_GET,
-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
-		.doit = team_nl_cmd_options_get,
-		.flags = GENL_ADMIN_PERM,
-	},
-	{
-		.cmd = TEAM_CMD_PORT_LIST_GET,
-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
-		.doit = team_nl_cmd_port_list_get,
-		.flags = GENL_ADMIN_PERM,
-	},
-};
-
 static const struct genl_multicast_group team_nl_mcgrps[] = {
 	{ .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
 };
@@ -2853,7 +2808,7 @@ static const struct genl_multicast_group team_nl_mcgrps[] = {
 static struct genl_family team_nl_family __ro_after_init = {
 	.name		= TEAM_GENL_NAME,
 	.version	= TEAM_GENL_VERSION,
-	.maxattr	= TEAM_ATTR_MAX,
+	.maxattr	= ARRAY_SIZE(team_nl_policy),
 	.policy = team_nl_policy,
 	.netnsok	= true,
 	.module		= THIS_MODULE,
diff --git a/drivers/net/team/team_nl.c b/drivers/net/team/team_nl.c
new file mode 100644
index 00000000000000..208424ab78f5b5
--- /dev/null
+++ b/drivers/net/team/team_nl.c
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
+/* Do not edit directly, auto-generated from: */
+/*	Documentation/netlink/specs/team.yaml */
+/* YNL-GEN kernel source */
+
+#include <net/netlink.h>
+#include <net/genetlink.h>
+
+#include "team_nl.h"
+
+#include <uapi/linux/if_team.h>
+
+/* Common nested types */
+const struct nla_policy team_attr_option_nl_policy[TEAM_ATTR_OPTION_ARRAY_INDEX + 1] = {
+	[TEAM_ATTR_OPTION_NAME] = { .type = NLA_STRING, .len = TEAM_STRING_MAX_LEN, },
+	[TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG, },
+	[TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8, },
+	[TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY, },
+	[TEAM_ATTR_OPTION_REMOVED] = { .type = NLA_FLAG, },
+	[TEAM_ATTR_OPTION_PORT_IFINDEX] = { .type = NLA_U32, },
+	[TEAM_ATTR_OPTION_ARRAY_INDEX] = { .type = NLA_U32, },
+};
+
+const struct nla_policy team_item_option_nl_policy[TEAM_ATTR_ITEM_OPTION + 1] = {
+	[TEAM_ATTR_ITEM_OPTION] = NLA_POLICY_NESTED(team_attr_option_nl_policy),
+};
+
+/* Global operation policy for team */
+const struct nla_policy team_nl_policy[TEAM_ATTR_LIST_OPTION + 1] = {
+	[TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32, },
+	[TEAM_ATTR_LIST_OPTION] = NLA_POLICY_NESTED(team_item_option_nl_policy),
+};
+
+/* Ops table for team */
+const struct genl_small_ops team_nl_ops[4] = {
+	{
+		.cmd		= TEAM_CMD_NOOP,
+		.validate	= GENL_DONT_VALIDATE_STRICT,
+		.doit		= team_nl_noop_doit,
+	},
+	{
+		.cmd		= TEAM_CMD_OPTIONS_SET,
+		.validate	= GENL_DONT_VALIDATE_STRICT,
+		.doit		= team_nl_options_set_doit,
+		.flags		= GENL_ADMIN_PERM,
+	},
+	{
+		.cmd		= TEAM_CMD_OPTIONS_GET,
+		.validate	= GENL_DONT_VALIDATE_STRICT,
+		.doit		= team_nl_options_get_doit,
+		.flags		= GENL_ADMIN_PERM,
+	},
+	{
+		.cmd		= TEAM_CMD_PORT_LIST_GET,
+		.validate	= GENL_DONT_VALIDATE_STRICT,
+		.doit		= team_nl_port_list_get_doit,
+		.flags		= GENL_ADMIN_PERM,
+	},
+};
diff --git a/drivers/net/team/team_nl.h b/drivers/net/team/team_nl.h
new file mode 100644
index 00000000000000..c9ec1b22ac4d3a
--- /dev/null
+++ b/drivers/net/team/team_nl.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
+/* Do not edit directly, auto-generated from: */
+/*	Documentation/netlink/specs/team.yaml */
+/* YNL-GEN kernel header */
+
+#ifndef _LINUX_TEAM_GEN_H
+#define _LINUX_TEAM_GEN_H
+
+#include <net/netlink.h>
+#include <net/genetlink.h>
+
+#include <uapi/linux/if_team.h>
+
+/* Common nested types */
+extern const struct nla_policy team_attr_option_nl_policy[TEAM_ATTR_OPTION_ARRAY_INDEX + 1];
+extern const struct nla_policy team_item_option_nl_policy[TEAM_ATTR_ITEM_OPTION + 1];
+
+/* Global operation policy for team */
+extern const struct nla_policy team_nl_policy[TEAM_ATTR_LIST_OPTION + 1];
+
+/* Ops table for team */
+extern const struct genl_small_ops team_nl_ops[4];
+
+int team_nl_noop_doit(struct sk_buff *skb, struct genl_info *info);
+int team_nl_options_set_doit(struct sk_buff *skb, struct genl_info *info);
+int team_nl_options_get_doit(struct sk_buff *skb, struct genl_info *info);
+int team_nl_port_list_get_doit(struct sk_buff *skb, struct genl_info *info);
+
+#endif /* _LINUX_TEAM_GEN_H */
diff --git a/include/uapi/linux/if_team.h b/include/uapi/linux/if_team.h
index 13c61fecb78b8b..a5c06243a43553 100644
--- a/include/uapi/linux/if_team.h
+++ b/include/uapi/linux/if_team.h
@@ -1,108 +1,78 @@
-/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
-/*
- * include/linux/if_team.h - Network team device driver header
- * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
+/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
+/* Do not edit directly, auto-generated from: */
+/*	Documentation/netlink/specs/team.yaml */
+/* YNL-GEN uapi header */
 
-#ifndef _UAPI_LINUX_IF_TEAM_H_
-#define _UAPI_LINUX_IF_TEAM_H_
+#ifndef _UAPI_LINUX_IF_TEAM_H
+#define _UAPI_LINUX_IF_TEAM_H
 
+#define TEAM_GENL_NAME		"team"
+#define TEAM_GENL_VERSION	1
 
-#define TEAM_STRING_MAX_LEN 32
-
-/**********************************
- * NETLINK_GENERIC netlink family.
- **********************************/
-
-enum {
-	TEAM_CMD_NOOP,
-	TEAM_CMD_OPTIONS_SET,
-	TEAM_CMD_OPTIONS_GET,
-	TEAM_CMD_PORT_LIST_GET,
-
-	__TEAM_CMD_MAX,
-	TEAM_CMD_MAX = (__TEAM_CMD_MAX - 1),
-};
+#define TEAM_STRING_MAX_LEN			32
+#define TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME	"change_event"
 
 enum {
 	TEAM_ATTR_UNSPEC,
-	TEAM_ATTR_TEAM_IFINDEX,		/* u32 */
-	TEAM_ATTR_LIST_OPTION,		/* nest */
-	TEAM_ATTR_LIST_PORT,		/* nest */
+	TEAM_ATTR_TEAM_IFINDEX,
+	TEAM_ATTR_LIST_OPTION,
+	TEAM_ATTR_LIST_PORT,
 
 	__TEAM_ATTR_MAX,
-	TEAM_ATTR_MAX = __TEAM_ATTR_MAX - 1,
+	TEAM_ATTR_MAX = (__TEAM_ATTR_MAX - 1)
 };
 
-/* Nested layout of get/set msg:
- *
- *	[TEAM_ATTR_LIST_OPTION]
- *		[TEAM_ATTR_ITEM_OPTION]
- *			[TEAM_ATTR_OPTION_*], ...
- *		[TEAM_ATTR_ITEM_OPTION]
- *			[TEAM_ATTR_OPTION_*], ...
- *		...
- *	[TEAM_ATTR_LIST_PORT]
- *		[TEAM_ATTR_ITEM_PORT]
- *			[TEAM_ATTR_PORT_*], ...
- *		[TEAM_ATTR_ITEM_PORT]
- *			[TEAM_ATTR_PORT_*], ...
- *		...
- */
-
 enum {
 	TEAM_ATTR_ITEM_OPTION_UNSPEC,
-	TEAM_ATTR_ITEM_OPTION,		/* nest */
+	TEAM_ATTR_ITEM_OPTION,
 
 	__TEAM_ATTR_ITEM_OPTION_MAX,
-	TEAM_ATTR_ITEM_OPTION_MAX = __TEAM_ATTR_ITEM_OPTION_MAX - 1,
+	TEAM_ATTR_ITEM_OPTION_MAX = (__TEAM_ATTR_ITEM_OPTION_MAX - 1)
 };
 
 enum {
 	TEAM_ATTR_OPTION_UNSPEC,
-	TEAM_ATTR_OPTION_NAME,		/* string */
-	TEAM_ATTR_OPTION_CHANGED,	/* flag */
-	TEAM_ATTR_OPTION_TYPE,		/* u8 */
-	TEAM_ATTR_OPTION_DATA,		/* dynamic */
-	TEAM_ATTR_OPTION_REMOVED,	/* flag */
-	TEAM_ATTR_OPTION_PORT_IFINDEX,	/* u32 */ /* for per-port options */
-	TEAM_ATTR_OPTION_ARRAY_INDEX,	/* u32 */ /* for array options */
+	TEAM_ATTR_OPTION_NAME,
+	TEAM_ATTR_OPTION_CHANGED,
+	TEAM_ATTR_OPTION_TYPE,
+	TEAM_ATTR_OPTION_DATA,
+	TEAM_ATTR_OPTION_REMOVED,
+	TEAM_ATTR_OPTION_PORT_IFINDEX,
+	TEAM_ATTR_OPTION_ARRAY_INDEX,
 
 	__TEAM_ATTR_OPTION_MAX,
-	TEAM_ATTR_OPTION_MAX = __TEAM_ATTR_OPTION_MAX - 1,
+	TEAM_ATTR_OPTION_MAX = (__TEAM_ATTR_OPTION_MAX - 1)
 };
 
 enum {
 	TEAM_ATTR_ITEM_PORT_UNSPEC,
-	TEAM_ATTR_ITEM_PORT,		/* nest */
+	TEAM_ATTR_ITEM_PORT,
 
 	__TEAM_ATTR_ITEM_PORT_MAX,
-	TEAM_ATTR_ITEM_PORT_MAX = __TEAM_ATTR_ITEM_PORT_MAX - 1,
+	TEAM_ATTR_ITEM_PORT_MAX = (__TEAM_ATTR_ITEM_PORT_MAX - 1)
 };
 
 enum {
 	TEAM_ATTR_PORT_UNSPEC,
-	TEAM_ATTR_PORT_IFINDEX,		/* u32 */
-	TEAM_ATTR_PORT_CHANGED,		/* flag */
-	TEAM_ATTR_PORT_LINKUP,		/* flag */
-	TEAM_ATTR_PORT_SPEED,		/* u32 */
-	TEAM_ATTR_PORT_DUPLEX,		/* u8 */
-	TEAM_ATTR_PORT_REMOVED,		/* flag */
+	TEAM_ATTR_PORT_IFINDEX,
+	TEAM_ATTR_PORT_CHANGED,
+	TEAM_ATTR_PORT_LINKUP,
+	TEAM_ATTR_PORT_SPEED,
+	TEAM_ATTR_PORT_DUPLEX,
+	TEAM_ATTR_PORT_REMOVED,
 
 	__TEAM_ATTR_PORT_MAX,
-	TEAM_ATTR_PORT_MAX = __TEAM_ATTR_PORT_MAX - 1,
+	TEAM_ATTR_PORT_MAX = (__TEAM_ATTR_PORT_MAX - 1)
 };
 
-/*
- * NETLINK_GENERIC related info
- */
-#define TEAM_GENL_NAME "team"
-#define TEAM_GENL_VERSION 0x1
-#define TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME "change_event"
+enum {
+	TEAM_CMD_NOOP,
+	TEAM_CMD_OPTIONS_SET,
+	TEAM_CMD_OPTIONS_GET,
+	TEAM_CMD_PORT_LIST_GET,
+
+	__TEAM_CMD_MAX,
+	TEAM_CMD_MAX = (__TEAM_CMD_MAX - 1)
+};
 
-#endif /* _UAPI_LINUX_IF_TEAM_H_ */
+#endif /* _UAPI_LINUX_IF_TEAM_H */