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edd7c245 | 1 | /* zebra daemon main routine. |
718e3744 | 2 | * Copyright (C) 1997, 98 Kunihiro Ishiguro |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
5e4fa164 | 23 | #include <lib/version.h> |
718e3744 | 24 | #include "getopt.h" |
25 | #include "command.h" | |
26 | #include "thread.h" | |
27 | #include "filter.h" | |
28 | #include "memory.h" | |
29 | #include "prefix.h" | |
30 | #include "log.h" | |
7514fb77 | 31 | #include "plist.h" |
edd7c245 | 32 | #include "privs.h" |
2d75d052 | 33 | #include "sigevent.h" |
b72ede27 | 34 | #include "vrf.h" |
4f04a76b | 35 | #include "libfrr.h" |
bf094f69 | 36 | #include "routemap.h" |
755100ac | 37 | #include "routing_nb.h" |
718e3744 | 38 | |
89272910 | 39 | #include "zebra/zebra_router.h" |
43e52561 | 40 | #include "zebra/zebra_errors.h" |
718e3744 | 41 | #include "zebra/rib.h" |
42 | #include "zebra/zserv.h" | |
43 | #include "zebra/debug.h" | |
18a6dce6 | 44 | #include "zebra/router-id.h" |
ca776988 | 45 | #include "zebra/irdp.h" |
a1ac18c4 | 46 | #include "zebra/rtadv.h" |
244c1cdc | 47 | #include "zebra/zebra_ptm.h" |
fe18ee2d | 48 | #include "zebra/zebra_ns.h" |
e2b1be64 | 49 | #include "zebra/redistribute.h" |
7758e3f3 | 50 | #include "zebra/zebra_mpls.h" |
fea12efb | 51 | #include "zebra/label_manager.h" |
e27dec3c | 52 | #include "zebra/zebra_netns_notify.h" |
453844ab | 53 | #include "zebra/zebra_rnh.h" |
4c0ec639 | 54 | #include "zebra/zebra_pbr.h" |
27627f9a | 55 | #include "zebra/zebra_vxlan.h" |
a2665e38 | 56 | #include "zebra/zebra_routemap.h" |
ce45ffe7 | 57 | #include "zebra/zebra_nb.h" |
9bb02389 | 58 | #include "zebra/zebra_opaque.h" |
31f937fb | 59 | #include "zebra/zebra_srte.h" |
6e68a084 | 60 | #include "zebra/zebra_srv6.h" |
6c0a7c09 | 61 | #include "zebra/zebra_srv6_vty.h" |
244c1cdc DS |
62 | |
63 | #define ZEBRA_PTM_SUPPORT | |
718e3744 | 64 | |
718e3744 | 65 | /* process id. */ |
718e3744 | 66 | pid_t pid; |
67 | ||
55c72803 | 68 | /* Pacify zclient.o in libfrr, which expects this variable. */ |
87efd646 | 69 | struct thread_master *master; |
70 | ||
718e3744 | 71 | /* Route retain mode flag. */ |
72 | int retain_mode = 0; | |
73 | ||
b72aae2e | 74 | /* Allow non-frr entities to delete frr routes */ |
6baf7bb8 DS |
75 | int allow_delete = 0; |
76 | ||
d4644d41 DS |
77 | int graceful_restart; |
78 | ||
6b093863 DS |
79 | bool v6_rr_semantics = false; |
80 | ||
c34b6b57 | 81 | #ifdef HAVE_NETLINK |
82 | /* Receive buffer size for netlink socket */ | |
d7c0a89a | 83 | uint32_t nl_rcvbufsize = 4194304; |
c34b6b57 | 84 | #endif /* HAVE_NETLINK */ |
85 | ||
6b093863 | 86 | #define OPTION_V6_RR_SEMANTICS 2000 |
e4876266 DS |
87 | #define OPTION_ASIC_OFFLOAD 2001 |
88 | ||
718e3744 | 89 | /* Command line options. */ |
2b64873d | 90 | const struct option longopts[] = { |
6b093863 DS |
91 | {"batch", no_argument, NULL, 'b'}, |
92 | {"allow_delete", no_argument, NULL, 'a'}, | |
6b093863 DS |
93 | {"socket", required_argument, NULL, 'z'}, |
94 | {"ecmp", required_argument, NULL, 'e'}, | |
6b093863 | 95 | {"retain", no_argument, NULL, 'r'}, |
d4644d41 | 96 | {"graceful_restart", required_argument, NULL, 'K'}, |
e4876266 | 97 | {"asic-offload", optional_argument, NULL, OPTION_ASIC_OFFLOAD}, |
c34b6b57 | 98 | #ifdef HAVE_NETLINK |
6b093863 DS |
99 | {"vrfwnetns", no_argument, NULL, 'n'}, |
100 | {"nl-bufsize", required_argument, NULL, 's'}, | |
101 | {"v6-rr-semantics", no_argument, NULL, OPTION_V6_RR_SEMANTICS}, | |
c34b6b57 | 102 | #endif /* HAVE_NETLINK */ |
6b093863 | 103 | {0}}; |
718e3744 | 104 | |
d62a17ae | 105 | zebra_capabilities_t _caps_p[] = { |
9d303b37 | 106 | ZCAP_NET_ADMIN, ZCAP_SYS_ADMIN, ZCAP_NET_RAW, |
edd7c245 | 107 | }; |
108 | ||
109 | /* zebra privileges to run with */ | |
d62a17ae | 110 | struct zebra_privs_t zserv_privs = { |
b2f36157 | 111 | #if defined(FRR_USER) && defined(FRR_GROUP) |
d62a17ae | 112 | .user = FRR_USER, |
113 | .group = FRR_GROUP, | |
edd7c245 | 114 | #endif |
115 | #ifdef VTY_GROUP | |
d62a17ae | 116 | .vty_group = VTY_GROUP, |
edd7c245 | 117 | #endif |
d62a17ae | 118 | .caps_p = _caps_p, |
119 | .cap_num_p = array_size(_caps_p), | |
120 | .cap_num_i = 0}; | |
edd7c245 | 121 | |
718e3744 | 122 | /* SIGHUP handler. */ |
d62a17ae | 123 | static void sighup(void) |
718e3744 | 124 | { |
d62a17ae | 125 | zlog_info("SIGHUP received"); |
718e3744 | 126 | |
d62a17ae | 127 | /* Reload of config file. */ |
128 | ; | |
718e3744 | 129 | } |
130 | ||
131 | /* SIGINT handler. */ | |
d62a17ae | 132 | static void sigint(void) |
718e3744 | 133 | { |
d62a17ae | 134 | struct vrf *vrf; |
135 | struct zebra_vrf *zvrf; | |
f3e33b69 QY |
136 | struct listnode *ln, *nn; |
137 | struct zserv *client; | |
ff2460d5 MS |
138 | static bool sigint_done; |
139 | ||
140 | if (sigint_done) | |
141 | return; | |
142 | ||
143 | sigint_done = true; | |
fe18ee2d | 144 | |
d62a17ae | 145 | zlog_notice("Terminating on signal"); |
718e3744 | 146 | |
2fc69f03 MS |
147 | atomic_store_explicit(&zrouter.in_shutdown, true, |
148 | memory_order_relaxed); | |
149 | ||
d7fc0e67 DS |
150 | /* send RA lifetime of 0 before stopping. rfc4861/6.2.5 */ |
151 | rtadv_stop_ra_all(); | |
152 | ||
03951374 | 153 | frr_early_fini(); |
718e3744 | 154 | |
9bb02389 MS |
155 | /* Stop the opaque module pthread */ |
156 | zebra_opaque_stop(); | |
157 | ||
4dfd7a02 MS |
158 | zebra_dplane_pre_finish(); |
159 | ||
b9e6727a S |
160 | /* Clean up GR related info. */ |
161 | zebra_gr_stale_client_cleanup(zrouter.stale_client_list); | |
162 | list_delete_all_node(zrouter.stale_client_list); | |
163 | ||
9bb02389 | 164 | /* Clean up zapi clients and server module */ |
161e9ab7 | 165 | for (ALL_LIST_ELEMENTS(zrouter.client_list, ln, nn, client)) |
f3e33b69 QY |
166 | zserv_close_client(client); |
167 | ||
41674562 | 168 | zserv_close(); |
161e9ab7 | 169 | list_delete_all_node(zrouter.client_list); |
41674562 | 170 | |
9bb02389 MS |
171 | /* Once all the zclients are cleaned up, clean up the opaque module */ |
172 | zebra_opaque_finish(); | |
173 | ||
f88bd20c | 174 | zebra_ptm_finish(); |
d62a17ae | 175 | |
b1b07ef5 DS |
176 | if (retain_mode) { |
177 | zebra_nhg_mark_keep(); | |
a2addae8 | 178 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
d62a17ae | 179 | zvrf = vrf->info; |
180 | if (zvrf) | |
181 | SET_FLAG(zvrf->flags, ZEBRA_VRF_RETAIN); | |
182 | } | |
b1b07ef5 | 183 | } |
3e0372d2 | 184 | |
695b279a MS |
185 | if (zrouter.lsp_process_q) |
186 | work_queue_free_and_null(&zrouter.lsp_process_q); | |
187 | ||
d62a17ae | 188 | vrf_terminate(); |
189 | ||
2961d060 | 190 | ns_walk_func(zebra_ns_early_shutdown, NULL, NULL); |
e27dec3c | 191 | zebra_ns_notify_close(); |
d62a17ae | 192 | |
193 | access_list_reset(); | |
194 | prefix_list_reset(); | |
a2665e38 | 195 | /* |
196 | * zebra_routemap_finish will | |
197 | * 1 set rmap upd timer to 0 so that rmap update wont be scheduled again | |
198 | * 2 Put off the rmap update thread | |
199 | * 3 route_map_finish | |
200 | */ | |
201 | zebra_routemap_finish(); | |
03951374 | 202 | |
161e9ab7 | 203 | list_delete(&zrouter.client_list); |
4dfd7a02 | 204 | |
ff2460d5 MS |
205 | /* Indicate that all new dplane work has been enqueued. When that |
206 | * work is complete, the dataplane will enqueue an event | |
207 | * with the 'finalize' function. | |
208 | */ | |
1d11b21f | 209 | zebra_dplane_finish(); |
4dfd7a02 MS |
210 | } |
211 | ||
ff2460d5 MS |
212 | /* |
213 | * Final shutdown step for the zebra main thread. This is run after all | |
214 | * async update processing has completed. | |
215 | */ | |
4dfd7a02 MS |
216 | int zebra_finalize(struct thread *dummy) |
217 | { | |
218 | zlog_info("Zebra final shutdown"); | |
219 | ||
62b8bb7a | 220 | /* Final shutdown of ns resources */ |
2961d060 | 221 | ns_walk_func(zebra_ns_final_shutdown, NULL, NULL); |
62b8bb7a | 222 | |
4dfd7a02 MS |
223 | /* Stop dplane thread and finish any cleanup */ |
224 | zebra_dplane_shutdown(); | |
1d11b21f | 225 | |
89272910 DS |
226 | zebra_router_terminate(); |
227 | ||
03951374 | 228 | frr_fini(); |
d62a17ae | 229 | exit(0); |
718e3744 | 230 | } |
231 | ||
232 | /* SIGUSR1 handler. */ | |
d62a17ae | 233 | static void sigusr1(void) |
718e3744 | 234 | { |
d62a17ae | 235 | zlog_rotate(); |
718e3744 | 236 | } |
237 | ||
7cc91e67 | 238 | struct frr_signal_t zebra_signals[] = { |
d62a17ae | 239 | { |
240 | .signal = SIGHUP, | |
241 | .handler = &sighup, | |
242 | }, | |
243 | { | |
244 | .signal = SIGUSR1, | |
245 | .handler = &sigusr1, | |
246 | }, | |
247 | { | |
248 | .signal = SIGINT, | |
249 | .handler = &sigint, | |
250 | }, | |
251 | { | |
252 | .signal = SIGTERM, | |
253 | .handler = &sigint, | |
254 | }, | |
2d75d052 | 255 | }; |
b72ede27 | 256 | |
0d8c7a26 | 257 | static const struct frr_yang_module_info *const zebra_yang_modules[] = { |
c2aab693 | 258 | &frr_filter_info, |
a4bed468 | 259 | &frr_interface_info, |
91835f1f | 260 | &frr_route_map_info, |
b87fa24d | 261 | &frr_zebra_info, |
6fd8972a | 262 | &frr_vrf_info, |
755100ac | 263 | &frr_routing_info, |
e71627cb | 264 | &frr_zebra_route_map_info, |
8fcdd0d6 RW |
265 | }; |
266 | ||
d62a17ae | 267 | FRR_DAEMON_INFO( |
268 | zebra, ZEBRA, .vty_port = ZEBRA_VTY_PORT, .flags = FRR_NO_ZCLIENT, | |
4f04a76b | 269 | |
d62a17ae | 270 | .proghelp = |
3efd0893 | 271 | "Daemon which manages kernel routing table management and\nredistribution between different routing protocols.", |
4f04a76b | 272 | |
d62a17ae | 273 | .signals = zebra_signals, .n_signals = array_size(zebra_signals), |
4f04a76b | 274 | |
8fcdd0d6 RW |
275 | .privs = &zserv_privs, |
276 | ||
277 | .yang_modules = zebra_yang_modules, | |
80413c20 DL |
278 | .n_yang_modules = array_size(zebra_yang_modules), |
279 | ); | |
4f04a76b | 280 | |
718e3744 | 281 | /* Main startup routine. */ |
d62a17ae | 282 | int main(int argc, char **argv) |
718e3744 | 283 | { |
d62a17ae | 284 | // int batch_mode = 0; |
285 | char *zserv_path = NULL; | |
689f5a8c DL |
286 | struct sockaddr_storage dummy; |
287 | socklen_t dummylen; | |
e4876266 DS |
288 | bool asic_offload = false; |
289 | bool notify_on_ack = true; | |
fea12efb | 290 | |
d4644d41 | 291 | graceful_restart = 0; |
78dd30b2 PG |
292 | vrf_configure_backend(VRF_BACKEND_VRF_LITE); |
293 | ||
d62a17ae | 294 | frr_preinit(&zebra_di, argc, argv); |
718e3744 | 295 | |
d62a17ae | 296 | frr_opt_add( |
ac2cb9bf | 297 | "baz:e:rK:" |
4f04a76b | 298 | #ifdef HAVE_NETLINK |
78dd30b2 | 299 | "s:n" |
411314ed | 300 | #endif |
d62a17ae | 301 | , |
302 | longopts, | |
d4644d41 DS |
303 | " -b, --batch Runs in batch mode\n" |
304 | " -a, --allow_delete Allow other processes to delete zebra routes\n" | |
305 | " -z, --socket Set path of zebra socket\n" | |
306 | " -e, --ecmp Specify ECMP to use.\n" | |
d4644d41 | 307 | " -r, --retain When program terminates, retain added route by zebra.\n" |
d4644d41 | 308 | " -K, --graceful_restart Graceful restart at the kernel level, timer in seconds for expiration\n" |
e4876266 | 309 | " -A, --asic-offload FRR is interacting with an asic underneath the linux kernel\n" |
4f04a76b | 310 | #ifdef HAVE_NETLINK |
d4644d41 DS |
311 | " -n, --vrfwnetns Use NetNS as VRF backend\n" |
312 | " -s, --nl-bufsize Set netlink receive buffer size\n" | |
313 | " --v6-rr-semantics Use v6 RR semantics\n" | |
4f04a76b | 314 | #endif /* HAVE_NETLINK */ |
6b093863 | 315 | ); |
d62a17ae | 316 | |
317 | while (1) { | |
318 | int opt = frr_getopt(argc, argv, NULL); | |
319 | ||
320 | if (opt == EOF) | |
321 | break; | |
322 | ||
323 | switch (opt) { | |
324 | case 0: | |
325 | break; | |
326 | case 'b': | |
327 | // batch_mode = 1; | |
328 | break; | |
329 | case 'a': | |
330 | allow_delete = 1; | |
331 | break; | |
1e03d6bc QY |
332 | case 'e': { |
333 | unsigned long int parsed_multipath = | |
334 | strtoul(optarg, NULL, 10); | |
335 | if (parsed_multipath == 0 | |
336 | || parsed_multipath > MULTIPATH_NUM | |
337 | || parsed_multipath > UINT32_MAX) { | |
af4c2728 | 338 | flog_err( |
e914ccbe | 339 | EC_ZEBRA_BAD_MULTIPATH_NUM, |
1e03d6bc | 340 | "Multipath Number specified must be less than %u and greater than 0", |
d62a17ae | 341 | MULTIPATH_NUM); |
342 | return 1; | |
343 | } | |
1e03d6bc | 344 | zrouter.multipath_num = parsed_multipath; |
d62a17ae | 345 | break; |
1e03d6bc | 346 | } |
d62a17ae | 347 | case 'z': |
348 | zserv_path = optarg; | |
689f5a8c DL |
349 | if (!frr_zclient_addr(&dummy, &dummylen, optarg)) { |
350 | fprintf(stderr, | |
351 | "Invalid zserv socket path: %s\n", | |
352 | optarg); | |
353 | exit(1); | |
354 | } | |
d62a17ae | 355 | break; |
d62a17ae | 356 | case 'r': |
357 | retain_mode = 1; | |
358 | break; | |
d4644d41 | 359 | case 'K': |
d4644d41 DS |
360 | graceful_restart = atoi(optarg); |
361 | break; | |
c34b6b57 | 362 | #ifdef HAVE_NETLINK |
d62a17ae | 363 | case 's': |
364 | nl_rcvbufsize = atoi(optarg); | |
365 | break; | |
78dd30b2 PG |
366 | case 'n': |
367 | vrf_configure_backend(VRF_BACKEND_NETNS); | |
368 | break; | |
6b093863 DS |
369 | case OPTION_V6_RR_SEMANTICS: |
370 | v6_rr_semantics = true; | |
371 | break; | |
e4876266 DS |
372 | case OPTION_ASIC_OFFLOAD: |
373 | if (!strcmp(optarg, "notify_on_offload")) | |
374 | notify_on_ack = false; | |
375 | if (!strcmp(optarg, "notify_on_ack")) | |
376 | notify_on_ack = true; | |
377 | asic_offload = true; | |
378 | break; | |
c34b6b57 | 379 | #endif /* HAVE_NETLINK */ |
d62a17ae | 380 | default: |
381 | frr_help_exit(1); | |
d62a17ae | 382 | } |
718e3744 | 383 | } |
d62a17ae | 384 | |
3801e764 | 385 | zrouter.master = frr_init(); |
d62a17ae | 386 | |
387 | /* Zebra related initialize. */ | |
e4876266 | 388 | zebra_router_init(asic_offload, notify_on_ack); |
5f145fb8 | 389 | zserv_init(); |
d62a17ae | 390 | rib_init(); |
391 | zebra_if_init(); | |
392 | zebra_debug_init(); | |
f84fc2c9 DS |
393 | |
394 | /* | |
395 | * Initialize NS( and implicitly the VRF module), and make kernel | |
396 | * routing socket. */ | |
ac2cb9bf | 397 | zebra_ns_init(); |
03fba42e | 398 | router_id_cmd_init(); |
f84fc2c9 | 399 | zebra_vty_init(); |
d62a17ae | 400 | access_list_init(); |
401 | prefix_list_init(); | |
402 | #if defined(HAVE_RTADV) | |
403 | rtadv_cmd_init(); | |
36735ed9 | 404 | #endif |
d62a17ae | 405 | /* PTM socket */ |
244c1cdc | 406 | #ifdef ZEBRA_PTM_SUPPORT |
d62a17ae | 407 | zebra_ptm_init(); |
244c1cdc | 408 | #endif |
718e3744 | 409 | |
d62a17ae | 410 | zebra_mpls_init(); |
411 | zebra_mpls_vty_init(); | |
2dd0d726 | 412 | zebra_pw_vty_init(); |
4c0ec639 | 413 | zebra_pbr_init(); |
9bb02389 | 414 | zebra_opaque_init(); |
31f937fb | 415 | zebra_srte_init(); |
6e68a084 | 416 | zebra_srv6_init(); |
6c0a7c09 | 417 | zebra_srv6_vty_init(); |
7758e3f3 | 418 | |
31f937fb SM |
419 | /* For debug purpose. */ |
420 | /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */ | |
718e3744 | 421 | |
d62a17ae | 422 | /* Process the configuration file. Among other configuration |
9d303b37 DL |
423 | * directives we can meet those installing static routes. Such |
424 | * requests will not be executed immediately, but queued in | |
425 | * zebra->ribq structure until we enter the main execution loop. | |
426 | * The notifications from kernel will show originating PID equal | |
427 | * to that after daemon() completes (if ever called). | |
428 | */ | |
d62a17ae | 429 | frr_config_fork(); |
718e3744 | 430 | |
d62a17ae | 431 | /* After we have successfully acquired the pidfile, we can be sure |
9d303b37 DL |
432 | * about being the only copy of zebra process, which is submitting |
433 | * changes to the FIB. | |
434 | * Clean up zebra-originated routes. The requests will be sent to OS | |
435 | * immediately, so originating PID in notifications from kernel | |
436 | * will be equal to the current getpid(). To know about such routes, | |
437 | * we have to have route_read() called before. | |
438 | */ | |
d4644d41 | 439 | zrouter.startup_time = monotime(NULL); |
c3343a75 DS |
440 | thread_add_timer(zrouter.master, rib_sweep_route, NULL, |
441 | graceful_restart, &zrouter.sweeper); | |
91b7351d | 442 | |
d62a17ae | 443 | /* Needed for BSD routing socket. */ |
444 | pid = getpid(); | |
718e3744 | 445 | |
e5a60d82 MS |
446 | /* Start dataplane system */ |
447 | zebra_dplane_start(); | |
448 | ||
9bb02389 MS |
449 | /* Start the ted module, before zserv */ |
450 | zebra_opaque_start(); | |
451 | ||
21ccc0cf QY |
452 | /* Start Zebra API server */ |
453 | zserv_start(zserv_path); | |
97be79f9 | 454 | |
d62a17ae | 455 | /* Init label manager */ |
e11d7c96 | 456 | label_manager_init(); |
fea12efb | 457 | |
453844ab QY |
458 | /* RNH init */ |
459 | zebra_rnh_init(); | |
89272910 | 460 | |
27627f9a KA |
461 | /* Config handler Init */ |
462 | zebra_evpn_init(); | |
463 | ||
5ad4c39c QY |
464 | /* Error init */ |
465 | zebra_error_init(); | |
453844ab | 466 | |
3801e764 | 467 | frr_run(zrouter.master); |
718e3744 | 468 | |
d62a17ae | 469 | /* Not reached... */ |
470 | return 0; | |
718e3744 | 471 | } |