Adding upstream version 9.1.upstream/9.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 490 insertions, 0 deletions

diff --git a/zebra/main.c b/zebra/main.c
new file mode 100644
index 0000000..1e833ce
--- /dev/null
+++ b/zebra/main.c
@@ -0,0 +1,490 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* zebra daemon main routine.
+ * Copyright (C) 1997, 98 Kunihiro Ishiguro
+ */
+
+#include <zebra.h>
+
+#include <lib/version.h>
+#include "getopt.h"
+#include "command.h"
+#include "frrevent.h"
+#include "filter.h"
+#include "memory.h"
+#include "prefix.h"
+#include "log.h"
+#include "plist.h"
+#include "privs.h"
+#include "sigevent.h"
+#include "vrf.h"
+#include "libfrr.h"
+#include "affinitymap.h"
+#include "routemap.h"
+#include "routing_nb.h"
+
+#include "zebra/zebra_router.h"
+#include "zebra/zebra_errors.h"
+#include "zebra/rib.h"
+#include "zebra/zserv.h"
+#include "zebra/debug.h"
+#include "zebra/router-id.h"
+#include "zebra/irdp.h"
+#include "zebra/rtadv.h"
+#include "zebra/zebra_ptm.h"
+#include "zebra/zebra_ns.h"
+#include "zebra/redistribute.h"
+#include "zebra/zebra_mpls.h"
+#include "zebra/label_manager.h"
+#include "zebra/zebra_netns_notify.h"
+#include "zebra/zebra_rnh.h"
+#include "zebra/zebra_pbr.h"
+#include "zebra/zebra_vxlan.h"
+#include "zebra/zebra_routemap.h"
+#include "zebra/zebra_nb.h"
+#include "zebra/zebra_opaque.h"
+#include "zebra/zebra_srte.h"
+#include "zebra/zebra_srv6.h"
+#include "zebra/zebra_srv6_vty.h"
+
+#define ZEBRA_PTM_SUPPORT
+
+/* process id. */
+pid_t pid;
+
+/* Pacify zclient.o in libfrr, which expects this variable. */
+struct event_loop *master;
+
+/* Route retain mode flag. */
+int retain_mode = 0;
+
+int graceful_restart;
+
+bool v6_rr_semantics = false;
+
+/* Receive buffer size for kernel control sockets */
+#define RCVBUFSIZE_MIN 4194304
+#ifdef HAVE_NETLINK
+uint32_t rcvbufsize = RCVBUFSIZE_MIN;
+#else
+uint32_t rcvbufsize = 128 * 1024;
+#endif
+
+uint32_t rt_table_main_id = RT_TABLE_MAIN;
+
+#define OPTION_V6_RR_SEMANTICS 2000
+#define OPTION_ASIC_OFFLOAD    2001
+#define OPTION_V6_WITH_V4_NEXTHOP 2002
+
+/* Command line options. */
+const struct option longopts[] = {
+	{ "batch", no_argument, NULL, 'b' },
+	{ "allow_delete", no_argument, NULL, 'a' },
+	{ "socket", required_argument, NULL, 'z' },
+	{ "ecmp", required_argument, NULL, 'e' },
+	{ "retain", no_argument, NULL, 'r' },
+	{ "graceful_restart", required_argument, NULL, 'K' },
+	{ "asic-offload", optional_argument, NULL, OPTION_ASIC_OFFLOAD },
+	{ "v6-with-v4-nexthops", no_argument, NULL, OPTION_V6_WITH_V4_NEXTHOP },
+#ifdef HAVE_NETLINK
+	{ "vrfwnetns", no_argument, NULL, 'n' },
+	{ "nl-bufsize", required_argument, NULL, 's' },
+	{ "v6-rr-semantics", no_argument, NULL, OPTION_V6_RR_SEMANTICS },
+#endif /* HAVE_NETLINK */
+	{"routing-table", optional_argument, NULL, 'R'},
+	{ 0 }
+};
+
+zebra_capabilities_t _caps_p[] = {ZCAP_NET_ADMIN, ZCAP_SYS_ADMIN,
+				  ZCAP_NET_RAW,
+#ifdef HAVE_DPDK
+				  ZCAP_IPC_LOCK,  ZCAP_READ_SEARCH,
+				  ZCAP_SYS_RAWIO
+#endif
+};
+
+/* zebra privileges to run with */
+struct zebra_privs_t zserv_privs = {
+#if defined(FRR_USER) && defined(FRR_GROUP)
+	.user = FRR_USER,
+	.group = FRR_GROUP,
+#endif
+#ifdef VTY_GROUP
+	.vty_group = VTY_GROUP,
+#endif
+	.caps_p = _caps_p,
+	.cap_num_p = array_size(_caps_p),
+	.cap_num_i = 0};
+
+/* SIGHUP handler. */
+static void sighup(void)
+{
+	zlog_info("SIGHUP received");
+
+	/* Reload of config file. */
+	;
+}
+
+/* SIGINT handler. */
+static void sigint(void)
+{
+	struct vrf *vrf;
+	struct zebra_vrf *zvrf;
+	struct listnode *ln, *nn;
+	struct zserv *client;
+	static bool sigint_done;
+
+	if (sigint_done)
+		return;
+
+	sigint_done = true;
+
+	zlog_notice("Terminating on signal");
+
+	atomic_store_explicit(&zrouter.in_shutdown, true,
+			      memory_order_relaxed);
+
+	/* send RA lifetime of 0 before stopping. rfc4861/6.2.5 */
+	rtadv_stop_ra_all();
+
+	frr_early_fini();
+
+	/* Stop the opaque module pthread */
+	zebra_opaque_stop();
+
+	zebra_dplane_pre_finish();
+
+	/* Clean up GR related info. */
+	zebra_gr_stale_client_cleanup(zrouter.stale_client_list);
+	list_delete_all_node(zrouter.stale_client_list);
+
+	/* Clean up zapi clients and server module */
+	for (ALL_LIST_ELEMENTS(zrouter.client_list, ln, nn, client))
+		zserv_close_client(client);
+
+	zserv_close();
+	list_delete_all_node(zrouter.client_list);
+
+	/* Once all the zclients are cleaned up, clean up the opaque module */
+	zebra_opaque_finish();
+
+	zebra_ptm_finish();
+
+	if (retain_mode) {
+		zebra_nhg_mark_keep();
+		RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) {
+			zvrf = vrf->info;
+			if (zvrf)
+				SET_FLAG(zvrf->flags, ZEBRA_VRF_RETAIN);
+		}
+	}
+
+	if (zrouter.lsp_process_q)
+		work_queue_free_and_null(&zrouter.lsp_process_q);
+
+	access_list_reset();
+	prefix_list_reset();
+	/*
+	 * zebra_routemap_finish will
+	 * 1 set rmap upd timer to 0 so that rmap update wont be scheduled again
+	 * 2 Put off the rmap update thread
+	 * 3 route_map_finish
+	 */
+	zebra_routemap_finish();
+
+	rib_update_finish();
+
+	list_delete(&zrouter.client_list);
+
+	/* Indicate that all new dplane work has been enqueued. When that
+	 * work is complete, the dataplane will enqueue an event
+	 * with the 'finalize' function.
+	 */
+	zebra_dplane_finish();
+}
+
+/*
+ * Final shutdown step for the zebra main thread. This is run after all
+ * async update processing has completed.
+ */
+void zebra_finalize(struct event *dummy)
+{
+	zlog_info("Zebra final shutdown");
+
+	vrf_terminate();
+
+	/*
+	 * Stop dplane thread and finish any cleanup
+	 * This is before the zebra_ns_early_shutdown call
+	 * because sockets that the dplane depends on are closed
+	 * in those functions
+	 */
+	zebra_dplane_shutdown();
+
+	ns_walk_func(zebra_ns_early_shutdown, NULL, NULL);
+	zebra_ns_notify_close();
+
+	/* Final shutdown of ns resources */
+	ns_walk_func(zebra_ns_final_shutdown, NULL, NULL);
+
+	zebra_router_terminate();
+
+	ns_terminate();
+	frr_fini();
+	exit(0);
+}
+
+/* SIGUSR1 handler. */
+static void sigusr1(void)
+{
+	zlog_rotate();
+}
+
+struct frr_signal_t zebra_signals[] = {
+	{
+		.signal = SIGHUP,
+		.handler = &sighup,
+	},
+	{
+		.signal = SIGUSR1,
+		.handler = &sigusr1,
+	},
+	{
+		.signal = SIGINT,
+		.handler = &sigint,
+	},
+	{
+		.signal = SIGTERM,
+		.handler = &sigint,
+	},
+};
+
+/* clang-format off */
+static const struct frr_yang_module_info *const zebra_yang_modules[] = {
+	&frr_filter_info,
+	&frr_interface_info,
+	&frr_route_map_info,
+	&frr_zebra_info,
+	&frr_vrf_info,
+	&frr_routing_info,
+	&frr_affinity_map_info,
+	&frr_zebra_route_map_info,
+};
+/* clang-format on */
+
+FRR_DAEMON_INFO(
+	zebra, ZEBRA, .vty_port = ZEBRA_VTY_PORT, .flags = FRR_NO_ZCLIENT,
+
+	.proghelp =
+		"Daemon which manages kernel routing table management and\nredistribution between different routing protocols.",
+
+	.signals = zebra_signals, .n_signals = array_size(zebra_signals),
+
+	.privs = &zserv_privs,
+
+	.yang_modules = zebra_yang_modules,
+	.n_yang_modules = array_size(zebra_yang_modules),
+);
+
+/* Main startup routine. */
+int main(int argc, char **argv)
+{
+	// int batch_mode = 0;
+	char *zserv_path = NULL;
+	struct sockaddr_storage dummy;
+	socklen_t dummylen;
+	bool asic_offload = false;
+	bool v6_with_v4_nexthop = false;
+	bool notify_on_ack = true;
+
+	graceful_restart = 0;
+	vrf_configure_backend(VRF_BACKEND_VRF_LITE);
+
+	frr_preinit(&zebra_di, argc, argv);
+
+	frr_opt_add("baz:e:rK:s:R:"
+#ifdef HAVE_NETLINK
+		    "n"
+#endif
+		    ,
+		    longopts,
+		    "  -b, --batch               Runs in batch mode\n"
+		    "  -a, --allow_delete        Allow other processes to delete zebra routes\n"
+		    "  -z, --socket              Set path of zebra socket\n"
+		    "  -e, --ecmp                Specify ECMP to use.\n"
+		    "  -r, --retain              When program terminates, retain added route by zebra.\n"
+		    "  -K, --graceful_restart    Graceful restart at the kernel level, timer in seconds for expiration\n"
+		    "  -A, --asic-offload        FRR is interacting with an asic underneath the linux kernel\n"
+		    "      --v6-with-v4-nexthops Underlying dataplane supports v6 routes with v4 nexthops"
+#ifdef HAVE_NETLINK
+		    "  -s, --nl-bufsize          Set netlink receive buffer size\n"
+		    "  -n, --vrfwnetns           Use NetNS as VRF backend\n"
+		    "      --v6-rr-semantics     Use v6 RR semantics\n"
+#else
+		    "  -s,                       Set kernel socket receive buffer size\n"
+#endif /* HAVE_NETLINK */
+		    "  -R, --routing-table       Set kernel routing table\n"
+	);
+
+	while (1) {
+		int opt = frr_getopt(argc, argv, NULL);
+
+		if (opt == EOF)
+			break;
+
+		switch (opt) {
+		case 0:
+			break;
+		case 'b':
+			// batch_mode = 1;
+			break;
+		case 'a':
+			zrouter.allow_delete = true;
+			break;
+		case 'e': {
+			unsigned long int parsed_multipath =
+				strtoul(optarg, NULL, 10);
+			if (parsed_multipath == 0
+			    || parsed_multipath > MULTIPATH_NUM
+			    || parsed_multipath > UINT32_MAX) {
+				flog_err(
+					EC_ZEBRA_BAD_MULTIPATH_NUM,
+					"Multipath Number specified must be less than %u and greater than 0",
+					MULTIPATH_NUM);
+				return 1;
+			}
+			zrouter.multipath_num = parsed_multipath;
+			break;
+		}
+		case 'z':
+			zserv_path = optarg;
+			if (!frr_zclient_addr(&dummy, &dummylen, optarg)) {
+				fprintf(stderr,
+					"Invalid zserv socket path: %s\n",
+					optarg);
+				exit(1);
+			}
+			break;
+		case 'r':
+			retain_mode = 1;
+			break;
+		case 'K':
+			graceful_restart = atoi(optarg);
+			break;
+		case 's':
+			rcvbufsize = atoi(optarg);
+			if (rcvbufsize < RCVBUFSIZE_MIN)
+				fprintf(stderr,
+					"Rcvbufsize is smaller than recommended value: %d\n",
+					RCVBUFSIZE_MIN);
+			break;
+		case 'R':
+			rt_table_main_id = atoi(optarg);
+			break;
+#ifdef HAVE_NETLINK
+		case 'n':
+			vrf_configure_backend(VRF_BACKEND_NETNS);
+			break;
+		case OPTION_V6_RR_SEMANTICS:
+			v6_rr_semantics = true;
+			break;
+		case OPTION_ASIC_OFFLOAD:
+			if (!strcmp(optarg, "notify_on_offload"))
+				notify_on_ack = false;
+			if (!strcmp(optarg, "notify_on_ack"))
+				notify_on_ack = true;
+			asic_offload = true;
+			break;
+		case OPTION_V6_WITH_V4_NEXTHOP:
+			v6_with_v4_nexthop = true;
+			break;
+#endif /* HAVE_NETLINK */
+		default:
+			frr_help_exit(1);
+		}
+	}
+
+	zrouter.master = frr_init();
+
+	/* Zebra related initialize. */
+	zebra_router_init(asic_offload, notify_on_ack, v6_with_v4_nexthop);
+	zserv_init();
+	rib_init();
+	zebra_if_init();
+	zebra_debug_init();
+
+	/*
+	 * Initialize NS( and implicitly the VRF module), and make kernel
+	 * routing socket. */
+	zebra_ns_init();
+	router_id_cmd_init();
+	zebra_vty_init();
+	access_list_init();
+	prefix_list_init();
+	rtadv_cmd_init();
+/* PTM socket */
+#ifdef ZEBRA_PTM_SUPPORT
+	zebra_ptm_init();
+#endif
+
+	zebra_mpls_init();
+	zebra_mpls_vty_init();
+	zebra_pw_vty_init();
+	zebra_pbr_init();
+	zebra_opaque_init();
+	zebra_srte_init();
+	zebra_srv6_init();
+	zebra_srv6_vty_init();
+
+	/* For debug purpose. */
+	/* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */
+
+	/* Process the configuration file. Among other configuration
+	*  directives we can meet those installing static routes. Such
+	*  requests will not be executed immediately, but queued in
+	*  zebra->ribq structure until we enter the main execution loop.
+	*  The notifications from kernel will show originating PID equal
+	*  to that after daemon() completes (if ever called).
+	*/
+	frr_config_fork();
+
+	/* After we have successfully acquired the pidfile, we can be sure
+	*  about being the only copy of zebra process, which is submitting
+	*  changes to the FIB.
+	*  Clean up zebra-originated routes. The requests will be sent to OS
+	*  immediately, so originating PID in notifications from kernel
+	*  will be equal to the current getpid(). To know about such routes,
+	* we have to have route_read() called before.
+	*/
+	zrouter.startup_time = monotime(NULL);
+	event_add_timer(zrouter.master, rib_sweep_route, NULL, graceful_restart,
+			&zrouter.sweeper);
+
+	/* Needed for BSD routing socket. */
+	pid = getpid();
+
+	/* Start dataplane system */
+	zebra_dplane_start();
+
+	/* Start the ted module, before zserv */
+	zebra_opaque_start();
+
+	/* Start Zebra API server */
+	zserv_start(zserv_path);
+
+	/* Init label manager */
+	label_manager_init();
+
+	/* RNH init */
+	zebra_rnh_init();
+
+	/* Config handler Init */
+	zebra_evpn_init();
+
+	/* Error init */
+	zebra_error_init();
+
+	frr_run(zrouter.master);
+
+	/* Not reached... */
+	return 0;
+}