Merge branch 'tools-ynl-auto-gen-for-all-genetlink-families'

Jakub Kicinski says:

====================
tools: ynl: auto-gen for all genetlink families

The code gen has caught up with all features required in genetlink
families in Linux 6.8 already. We have also stopped committing auto-
-generated user space code to the tree. Instead of listing all the
families in the Makefile search the spec directory, and generate
code for everything that's not legacy netlink.
====================

Link: https://lore.kernel.org/r/20240202004926.447803-1-kuba@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

tools/net/ynl/Makefile.deps

@@ -15,7 +15,9 @@ UAPI_PATH:=../../../../include/uapi/
 get_hdr_inc=-D$(1) -include $(UAPI_PATH)/linux/$(2)
 
 CFLAGS_devlink:=$(call get_hdr_inc,_LINUX_DEVLINK_H_,devlink.h)
+CFLAGS_dpll:=$(call get_hdr_inc,_LINUX_DPLL_H_,dpll.h)
 CFLAGS_ethtool:=$(call get_hdr_inc,_LINUX_ETHTOOL_NETLINK_H_,ethtool_netlink.h)
 CFLAGS_handshake:=$(call get_hdr_inc,_LINUX_HANDSHAKE_H,handshake.h)
+CFLAGS_mptcp_pm:=$(call get_hdr_inc,_LINUX_MPTCP_PM_H_,mptcp_pm.h)
 CFLAGS_netdev:=$(call get_hdr_inc,_LINUX_NETDEV_H,netdev.h)
 CFLAGS_nfsd:=$(call get_hdr_inc,_LINUX_NFSD_NETLINK_H,nfsd_netlink.h)

tools/net/ynl/generated/Makefile

@@ -14,7 +14,10 @@ YNL_GEN_ARG_ethtool:=--user-header linux/ethtool_netlink.h \
 
 TOOL:=../ynl-gen-c.py
 
-GENS:=ethtool devlink handshake fou netdev nfsd
+GENS_PATHS=$(shell grep -nrI --files-without-match \
+		'protocol: netlink' \
+		../../../../Documentation/netlink/specs/)
+GENS=$(patsubst ../../../../Documentation/netlink/specs/%.yaml,%,${GENS_PATHS})
 SRCS=$(patsubst %,%-user.c,${GENS})
 HDRS=$(patsubst %,%-user.h,${GENS})
 OBJS=$(patsubst %,%-user.o,${GENS})

tools/net/ynl/samples/.gitignore

 ethtool
 devlink
 netdev
+ovs
 page-pool
\ No newline at end of file

tools/net/ynl/samples/ovs.c

+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <string.h>
+
+#include <ynl.h>
+
+#include "ovs_datapath-user.h"
+
+int main(int argc, char **argv)
+{
+	struct ynl_sock *ys;
+	int err;
+
+	ys = ynl_sock_create(&ynl_ovs_datapath_family, NULL);
+	if (!ys)
+		return 1;
+
+	if (argc > 1) {
+		struct ovs_datapath_new_req *req;
+
+		req = ovs_datapath_new_req_alloc();
+		if (!req)
+			goto err_close;
+
+		ovs_datapath_new_req_set_upcall_pid(req, 1);
+		ovs_datapath_new_req_set_name(req, argv[1]);
+
+		err = ovs_datapath_new(ys, req);
+		ovs_datapath_new_req_free(req);
+		if (err)
+			goto err_close;
+	} else {
+		struct ovs_datapath_get_req_dump *req;
+		struct ovs_datapath_get_list *dps;
+
+		printf("Dump:\n");
+		req = ovs_datapath_get_req_dump_alloc();
+
+		dps = ovs_datapath_get_dump(ys, req);
+		ovs_datapath_get_req_dump_free(req);
+		if (!dps)
+			goto err_close;
+
+		ynl_dump_foreach(dps, dp) {
+			printf("  %s(%d): pid:%u cache:%u\n",
+			       dp->name, dp->_hdr.dp_ifindex,
+			       dp->upcall_pid, dp->masks_cache_size);
+		}
+		ovs_datapath_get_list_free(dps);
+	}
+
+	ynl_sock_destroy(ys);
+
+	return 0;
+
+err_close:
+	fprintf(stderr, "YNL (%d): %s\n", ys->err.code, ys->err.msg);
+	ynl_sock_destroy(ys);
+	return 2;
+}