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d35f447d RZ |
1 | /* |
2 | * Zebra dataplane plugin for Forwarding Plane Manager (FPM) using netlink. | |
3 | * | |
4 | * Copyright (C) 2019 Network Device Education Foundation, Inc. ("NetDEF") | |
5 | * Rafael Zalamena | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License along | |
18 | * with this program; see the file COPYING; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
7309092b DL |
22 | #ifdef HAVE_CONFIG_H |
23 | #include "config.h" /* Include this explicitly */ | |
24 | #endif | |
25 | ||
d35f447d RZ |
26 | #include <arpa/inet.h> |
27 | ||
28 | #include <sys/types.h> | |
29 | #include <sys/socket.h> | |
30 | ||
31 | #include <errno.h> | |
32 | #include <string.h> | |
33 | ||
d35f447d | 34 | #include "lib/zebra.h" |
6cc059cd | 35 | #include "lib/json.h" |
d35f447d | 36 | #include "lib/libfrr.h" |
c871e6c9 | 37 | #include "lib/frratomic.h" |
3bdd7fca | 38 | #include "lib/command.h" |
d35f447d RZ |
39 | #include "lib/memory.h" |
40 | #include "lib/network.h" | |
41 | #include "lib/ns.h" | |
42 | #include "lib/frr_pthread.h" | |
e5e444d8 | 43 | #include "zebra/debug.h" |
bda10adf | 44 | #include "zebra/interface.h" |
d35f447d | 45 | #include "zebra/zebra_dplane.h" |
018e77bc | 46 | #include "zebra/zebra_router.h" |
bda10adf | 47 | #include "zebra/zebra_vxlan_private.h" |
d35f447d RZ |
48 | #include "zebra/kernel_netlink.h" |
49 | #include "zebra/rt_netlink.h" | |
50 | #include "zebra/debug.h" | |
51 | ||
52 | #define SOUTHBOUND_DEFAULT_ADDR INADDR_LOOPBACK | |
53 | #define SOUTHBOUND_DEFAULT_PORT 2620 | |
54 | ||
a179ba35 RZ |
55 | /** |
56 | * FPM header: | |
57 | * { | |
58 | * version: 1 byte (always 1), | |
59 | * type: 1 byte (1 for netlink, 2 protobuf), | |
60 | * len: 2 bytes (network order), | |
61 | * } | |
62 | * | |
63 | * This header is used with any format to tell the users how many bytes to | |
64 | * expect. | |
65 | */ | |
66 | #define FPM_HEADER_SIZE 4 | |
67 | ||
d35f447d RZ |
68 | static const char *prov_name = "dplane_fpm_nl"; |
69 | ||
70 | struct fpm_nl_ctx { | |
71 | /* data plane connection. */ | |
72 | int socket; | |
3bdd7fca | 73 | bool disabled; |
d35f447d | 74 | bool connecting; |
018e77bc | 75 | bool rib_complete; |
bda10adf | 76 | bool rmac_complete; |
b55ab92a | 77 | bool use_nhg; |
d35f447d RZ |
78 | struct sockaddr_storage addr; |
79 | ||
80 | /* data plane buffers. */ | |
81 | struct stream *ibuf; | |
82 | struct stream *obuf; | |
83 | pthread_mutex_t obuf_mutex; | |
84 | ||
ba803a2f RZ |
85 | /* |
86 | * data plane context queue: | |
87 | * When a FPM server connection becomes a bottleneck, we must keep the | |
88 | * data plane contexts until we get a chance to process them. | |
89 | */ | |
90 | struct dplane_ctx_q ctxqueue; | |
91 | pthread_mutex_t ctxqueue_mutex; | |
92 | ||
d35f447d | 93 | /* data plane events. */ |
ba803a2f | 94 | struct zebra_dplane_provider *prov; |
d35f447d RZ |
95 | struct frr_pthread *fthread; |
96 | struct thread *t_connect; | |
97 | struct thread *t_read; | |
98 | struct thread *t_write; | |
3bdd7fca | 99 | struct thread *t_event; |
ba803a2f | 100 | struct thread *t_dequeue; |
018e77bc RZ |
101 | |
102 | /* zebra events. */ | |
981ca597 RZ |
103 | struct thread *t_nhgreset; |
104 | struct thread *t_nhgwalk; | |
018e77bc RZ |
105 | struct thread *t_ribreset; |
106 | struct thread *t_ribwalk; | |
bda10adf RZ |
107 | struct thread *t_rmacreset; |
108 | struct thread *t_rmacwalk; | |
6cc059cd RZ |
109 | |
110 | /* Statistic counters. */ | |
111 | struct { | |
112 | /* Amount of bytes read into ibuf. */ | |
770a8d28 | 113 | _Atomic uint32_t bytes_read; |
6cc059cd | 114 | /* Amount of bytes written from obuf. */ |
770a8d28 | 115 | _Atomic uint32_t bytes_sent; |
ad4d1022 | 116 | /* Output buffer current usage. */ |
770a8d28 | 117 | _Atomic uint32_t obuf_bytes; |
ad4d1022 | 118 | /* Output buffer peak usage. */ |
770a8d28 | 119 | _Atomic uint32_t obuf_peak; |
6cc059cd RZ |
120 | |
121 | /* Amount of connection closes. */ | |
770a8d28 | 122 | _Atomic uint32_t connection_closes; |
6cc059cd | 123 | /* Amount of connection errors. */ |
770a8d28 | 124 | _Atomic uint32_t connection_errors; |
6cc059cd RZ |
125 | |
126 | /* Amount of user configurations: FNE_RECONNECT. */ | |
770a8d28 | 127 | _Atomic uint32_t user_configures; |
6cc059cd | 128 | /* Amount of user disable requests: FNE_DISABLE. */ |
770a8d28 | 129 | _Atomic uint32_t user_disables; |
6cc059cd RZ |
130 | |
131 | /* Amount of data plane context processed. */ | |
770a8d28 | 132 | _Atomic uint32_t dplane_contexts; |
ba803a2f | 133 | /* Amount of data plane contexts enqueued. */ |
770a8d28 | 134 | _Atomic uint32_t ctxqueue_len; |
ba803a2f | 135 | /* Peak amount of data plane contexts enqueued. */ |
770a8d28 | 136 | _Atomic uint32_t ctxqueue_len_peak; |
6cc059cd RZ |
137 | |
138 | /* Amount of buffer full events. */ | |
770a8d28 | 139 | _Atomic uint32_t buffer_full; |
6cc059cd | 140 | } counters; |
770a8d28 | 141 | } *gfnc; |
3bdd7fca RZ |
142 | |
143 | enum fpm_nl_events { | |
144 | /* Ask for FPM to reconnect the external server. */ | |
145 | FNE_RECONNECT, | |
146 | /* Disable FPM. */ | |
147 | FNE_DISABLE, | |
6cc059cd RZ |
148 | /* Reset counters. */ |
149 | FNE_RESET_COUNTERS, | |
b55ab92a RZ |
150 | /* Toggle next hop group feature. */ |
151 | FNE_TOGGLE_NHG, | |
a2032324 RZ |
152 | /* Reconnect request by our own code to avoid races. */ |
153 | FNE_INTERNAL_RECONNECT, | |
d35f447d RZ |
154 | }; |
155 | ||
a2032324 RZ |
156 | #define FPM_RECONNECT(fnc) \ |
157 | thread_add_event((fnc)->fthread->master, fpm_process_event, (fnc), \ | |
158 | FNE_INTERNAL_RECONNECT, &(fnc)->t_event) | |
159 | ||
018e77bc RZ |
160 | /* |
161 | * Prototypes. | |
162 | */ | |
3bdd7fca | 163 | static int fpm_process_event(struct thread *t); |
018e77bc | 164 | static int fpm_nl_enqueue(struct fpm_nl_ctx *fnc, struct zebra_dplane_ctx *ctx); |
981ca597 RZ |
165 | static int fpm_nhg_send(struct thread *t); |
166 | static int fpm_nhg_reset(struct thread *t); | |
018e77bc RZ |
167 | static int fpm_rib_send(struct thread *t); |
168 | static int fpm_rib_reset(struct thread *t); | |
bda10adf RZ |
169 | static int fpm_rmac_send(struct thread *t); |
170 | static int fpm_rmac_reset(struct thread *t); | |
018e77bc | 171 | |
ad4d1022 RZ |
172 | /* |
173 | * Helper functions. | |
174 | */ | |
175 | ||
176 | /** | |
177 | * Reorganizes the data on the buffer so it can fit more data. | |
178 | * | |
179 | * @param s stream pointer. | |
180 | */ | |
181 | static void stream_pulldown(struct stream *s) | |
182 | { | |
183 | size_t rlen = STREAM_READABLE(s); | |
184 | ||
185 | /* No more data, so just move the pointers. */ | |
186 | if (rlen == 0) { | |
187 | stream_reset(s); | |
188 | return; | |
189 | } | |
190 | ||
191 | /* Move the available data to the beginning. */ | |
192 | memmove(s->data, &s->data[s->getp], rlen); | |
193 | s->getp = 0; | |
194 | s->endp = rlen; | |
195 | } | |
196 | ||
3bdd7fca RZ |
197 | /* |
198 | * CLI. | |
199 | */ | |
6cc059cd RZ |
200 | #define FPM_STR "Forwarding Plane Manager configuration\n" |
201 | ||
3bdd7fca RZ |
202 | DEFUN(fpm_set_address, fpm_set_address_cmd, |
203 | "fpm address <A.B.C.D|X:X::X:X> [port (1-65535)]", | |
6cc059cd | 204 | FPM_STR |
3bdd7fca RZ |
205 | "FPM remote listening server address\n" |
206 | "Remote IPv4 FPM server\n" | |
207 | "Remote IPv6 FPM server\n" | |
208 | "FPM remote listening server port\n" | |
209 | "Remote FPM server port\n") | |
210 | { | |
211 | struct sockaddr_in *sin; | |
212 | struct sockaddr_in6 *sin6; | |
213 | uint16_t port = 0; | |
214 | uint8_t naddr[INET6_BUFSIZ]; | |
215 | ||
216 | if (argc == 5) | |
217 | port = strtol(argv[4]->arg, NULL, 10); | |
218 | ||
219 | /* Handle IPv4 addresses. */ | |
220 | if (inet_pton(AF_INET, argv[2]->arg, naddr) == 1) { | |
221 | sin = (struct sockaddr_in *)&gfnc->addr; | |
222 | ||
223 | memset(sin, 0, sizeof(*sin)); | |
224 | sin->sin_family = AF_INET; | |
225 | sin->sin_port = | |
226 | port ? htons(port) : htons(SOUTHBOUND_DEFAULT_PORT); | |
227 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
228 | sin->sin_len = sizeof(*sin); | |
229 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
230 | memcpy(&sin->sin_addr, naddr, sizeof(sin->sin_addr)); | |
231 | ||
232 | goto ask_reconnect; | |
233 | } | |
234 | ||
235 | /* Handle IPv6 addresses. */ | |
236 | if (inet_pton(AF_INET6, argv[2]->arg, naddr) != 1) { | |
237 | vty_out(vty, "%% Invalid address: %s\n", argv[2]->arg); | |
238 | return CMD_WARNING; | |
239 | } | |
240 | ||
241 | sin6 = (struct sockaddr_in6 *)&gfnc->addr; | |
242 | memset(sin6, 0, sizeof(*sin6)); | |
243 | sin6->sin6_family = AF_INET6; | |
244 | sin6->sin6_port = port ? htons(port) : htons(SOUTHBOUND_DEFAULT_PORT); | |
245 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
246 | sin6->sin6_len = sizeof(*sin6); | |
247 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
248 | memcpy(&sin6->sin6_addr, naddr, sizeof(sin6->sin6_addr)); | |
249 | ||
250 | ask_reconnect: | |
251 | thread_add_event(gfnc->fthread->master, fpm_process_event, gfnc, | |
252 | FNE_RECONNECT, &gfnc->t_event); | |
253 | return CMD_SUCCESS; | |
254 | } | |
255 | ||
256 | DEFUN(no_fpm_set_address, no_fpm_set_address_cmd, | |
257 | "no fpm address [<A.B.C.D|X:X::X:X> [port <1-65535>]]", | |
258 | NO_STR | |
6cc059cd | 259 | FPM_STR |
3bdd7fca RZ |
260 | "FPM remote listening server address\n" |
261 | "Remote IPv4 FPM server\n" | |
262 | "Remote IPv6 FPM server\n" | |
263 | "FPM remote listening server port\n" | |
264 | "Remote FPM server port\n") | |
265 | { | |
266 | thread_add_event(gfnc->fthread->master, fpm_process_event, gfnc, | |
267 | FNE_DISABLE, &gfnc->t_event); | |
268 | return CMD_SUCCESS; | |
269 | } | |
270 | ||
b55ab92a RZ |
271 | DEFUN(fpm_use_nhg, fpm_use_nhg_cmd, |
272 | "fpm use-next-hop-groups", | |
273 | FPM_STR | |
274 | "Use netlink next hop groups feature.\n") | |
275 | { | |
276 | /* Already enabled. */ | |
277 | if (gfnc->use_nhg) | |
278 | return CMD_SUCCESS; | |
279 | ||
280 | thread_add_event(gfnc->fthread->master, fpm_process_event, gfnc, | |
281 | FNE_TOGGLE_NHG, &gfnc->t_event); | |
282 | ||
283 | return CMD_SUCCESS; | |
284 | } | |
285 | ||
286 | DEFUN(no_fpm_use_nhg, no_fpm_use_nhg_cmd, | |
287 | "no fpm use-next-hop-groups", | |
288 | NO_STR | |
289 | FPM_STR | |
290 | "Use netlink next hop groups feature.\n") | |
291 | { | |
292 | /* Already disabled. */ | |
293 | if (!gfnc->use_nhg) | |
294 | return CMD_SUCCESS; | |
295 | ||
296 | thread_add_event(gfnc->fthread->master, fpm_process_event, gfnc, | |
297 | FNE_TOGGLE_NHG, &gfnc->t_event); | |
298 | ||
299 | return CMD_SUCCESS; | |
300 | } | |
301 | ||
6cc059cd RZ |
302 | DEFUN(fpm_reset_counters, fpm_reset_counters_cmd, |
303 | "clear fpm counters", | |
304 | CLEAR_STR | |
305 | FPM_STR | |
306 | "FPM statistic counters\n") | |
307 | { | |
308 | thread_add_event(gfnc->fthread->master, fpm_process_event, gfnc, | |
309 | FNE_RESET_COUNTERS, &gfnc->t_event); | |
310 | return CMD_SUCCESS; | |
311 | } | |
312 | ||
313 | DEFUN(fpm_show_counters, fpm_show_counters_cmd, | |
314 | "show fpm counters", | |
315 | SHOW_STR | |
316 | FPM_STR | |
317 | "FPM statistic counters\n") | |
318 | { | |
319 | vty_out(vty, "%30s\n%30s\n", "FPM counters", "============"); | |
320 | ||
321 | #define SHOW_COUNTER(label, counter) \ | |
770a8d28 | 322 | vty_out(vty, "%28s: %u\n", (label), (counter)) |
6cc059cd RZ |
323 | |
324 | SHOW_COUNTER("Input bytes", gfnc->counters.bytes_read); | |
325 | SHOW_COUNTER("Output bytes", gfnc->counters.bytes_sent); | |
ad4d1022 RZ |
326 | SHOW_COUNTER("Output buffer current size", gfnc->counters.obuf_bytes); |
327 | SHOW_COUNTER("Output buffer peak size", gfnc->counters.obuf_peak); | |
6cc059cd RZ |
328 | SHOW_COUNTER("Connection closes", gfnc->counters.connection_closes); |
329 | SHOW_COUNTER("Connection errors", gfnc->counters.connection_errors); | |
330 | SHOW_COUNTER("Data plane items processed", | |
331 | gfnc->counters.dplane_contexts); | |
ba803a2f RZ |
332 | SHOW_COUNTER("Data plane items enqueued", |
333 | gfnc->counters.ctxqueue_len); | |
334 | SHOW_COUNTER("Data plane items queue peak", | |
335 | gfnc->counters.ctxqueue_len_peak); | |
6cc059cd RZ |
336 | SHOW_COUNTER("Buffer full hits", gfnc->counters.buffer_full); |
337 | SHOW_COUNTER("User FPM configurations", gfnc->counters.user_configures); | |
338 | SHOW_COUNTER("User FPM disable requests", gfnc->counters.user_disables); | |
339 | ||
340 | #undef SHOW_COUNTER | |
341 | ||
342 | return CMD_SUCCESS; | |
343 | } | |
344 | ||
345 | DEFUN(fpm_show_counters_json, fpm_show_counters_json_cmd, | |
346 | "show fpm counters json", | |
347 | SHOW_STR | |
348 | FPM_STR | |
349 | "FPM statistic counters\n" | |
350 | JSON_STR) | |
351 | { | |
352 | struct json_object *jo; | |
353 | ||
354 | jo = json_object_new_object(); | |
355 | json_object_int_add(jo, "bytes-read", gfnc->counters.bytes_read); | |
356 | json_object_int_add(jo, "bytes-sent", gfnc->counters.bytes_sent); | |
ad4d1022 RZ |
357 | json_object_int_add(jo, "obuf-bytes", gfnc->counters.obuf_bytes); |
358 | json_object_int_add(jo, "obuf-bytes-peak", gfnc->counters.obuf_peak); | |
a50404aa RZ |
359 | json_object_int_add(jo, "connection-closes", |
360 | gfnc->counters.connection_closes); | |
361 | json_object_int_add(jo, "connection-errors", | |
362 | gfnc->counters.connection_errors); | |
363 | json_object_int_add(jo, "data-plane-contexts", | |
364 | gfnc->counters.dplane_contexts); | |
ba803a2f RZ |
365 | json_object_int_add(jo, "data-plane-contexts-queue", |
366 | gfnc->counters.ctxqueue_len); | |
367 | json_object_int_add(jo, "data-plane-contexts-queue-peak", | |
368 | gfnc->counters.ctxqueue_len_peak); | |
6cc059cd | 369 | json_object_int_add(jo, "buffer-full-hits", gfnc->counters.buffer_full); |
a50404aa RZ |
370 | json_object_int_add(jo, "user-configures", |
371 | gfnc->counters.user_configures); | |
6cc059cd RZ |
372 | json_object_int_add(jo, "user-disables", gfnc->counters.user_disables); |
373 | vty_out(vty, "%s\n", json_object_to_json_string_ext(jo, 0)); | |
374 | json_object_free(jo); | |
375 | ||
376 | return CMD_SUCCESS; | |
377 | } | |
378 | ||
3bdd7fca RZ |
379 | static int fpm_write_config(struct vty *vty) |
380 | { | |
381 | struct sockaddr_in *sin; | |
382 | struct sockaddr_in6 *sin6; | |
383 | int written = 0; | |
384 | char addrstr[INET6_ADDRSTRLEN]; | |
385 | ||
386 | if (gfnc->disabled) | |
387 | return written; | |
388 | ||
389 | switch (gfnc->addr.ss_family) { | |
390 | case AF_INET: | |
391 | written = 1; | |
392 | sin = (struct sockaddr_in *)&gfnc->addr; | |
393 | inet_ntop(AF_INET, &sin->sin_addr, addrstr, sizeof(addrstr)); | |
394 | vty_out(vty, "fpm address %s", addrstr); | |
395 | if (sin->sin_port != htons(SOUTHBOUND_DEFAULT_PORT)) | |
396 | vty_out(vty, " port %d", ntohs(sin->sin_port)); | |
397 | ||
398 | vty_out(vty, "\n"); | |
399 | break; | |
400 | case AF_INET6: | |
401 | written = 1; | |
402 | sin6 = (struct sockaddr_in6 *)&gfnc->addr; | |
403 | inet_ntop(AF_INET, &sin6->sin6_addr, addrstr, sizeof(addrstr)); | |
404 | vty_out(vty, "fpm address %s", addrstr); | |
405 | if (sin6->sin6_port != htons(SOUTHBOUND_DEFAULT_PORT)) | |
406 | vty_out(vty, " port %d", ntohs(sin6->sin6_port)); | |
407 | ||
408 | vty_out(vty, "\n"); | |
409 | break; | |
410 | ||
411 | default: | |
412 | break; | |
413 | } | |
414 | ||
b55ab92a RZ |
415 | if (!gfnc->use_nhg) { |
416 | vty_out(vty, "no fpm use-next-hop-groups\n"); | |
417 | written = 1; | |
418 | } | |
419 | ||
3bdd7fca RZ |
420 | return written; |
421 | } | |
422 | ||
612c2c15 | 423 | static struct cmd_node fpm_node = { |
893d8beb DL |
424 | .name = "fpm", |
425 | .node = FPM_NODE, | |
3bdd7fca | 426 | .prompt = "", |
612c2c15 | 427 | .config_write = fpm_write_config, |
3bdd7fca RZ |
428 | }; |
429 | ||
d35f447d RZ |
430 | /* |
431 | * FPM functions. | |
432 | */ | |
433 | static int fpm_connect(struct thread *t); | |
434 | ||
435 | static void fpm_reconnect(struct fpm_nl_ctx *fnc) | |
436 | { | |
a2032324 RZ |
437 | /* Cancel all zebra threads first. */ |
438 | thread_cancel_async(zrouter.master, &fnc->t_nhgreset, NULL); | |
439 | thread_cancel_async(zrouter.master, &fnc->t_nhgwalk, NULL); | |
440 | thread_cancel_async(zrouter.master, &fnc->t_ribreset, NULL); | |
441 | thread_cancel_async(zrouter.master, &fnc->t_ribwalk, NULL); | |
442 | thread_cancel_async(zrouter.master, &fnc->t_rmacreset, NULL); | |
443 | thread_cancel_async(zrouter.master, &fnc->t_rmacwalk, NULL); | |
444 | ||
445 | /* | |
446 | * Grab the lock to empty the streams (data plane might try to | |
447 | * enqueue updates while we are closing). | |
448 | */ | |
d35f447d RZ |
449 | frr_mutex_lock_autounlock(&fnc->obuf_mutex); |
450 | ||
3bdd7fca RZ |
451 | /* Avoid calling close on `-1`. */ |
452 | if (fnc->socket != -1) { | |
453 | close(fnc->socket); | |
454 | fnc->socket = -1; | |
455 | } | |
456 | ||
d35f447d RZ |
457 | stream_reset(fnc->ibuf); |
458 | stream_reset(fnc->obuf); | |
459 | THREAD_OFF(fnc->t_read); | |
460 | THREAD_OFF(fnc->t_write); | |
018e77bc | 461 | |
3bdd7fca RZ |
462 | /* FPM is disabled, don't attempt to connect. */ |
463 | if (fnc->disabled) | |
464 | return; | |
465 | ||
d35f447d RZ |
466 | thread_add_timer(fnc->fthread->master, fpm_connect, fnc, 3, |
467 | &fnc->t_connect); | |
468 | } | |
469 | ||
470 | static int fpm_read(struct thread *t) | |
471 | { | |
472 | struct fpm_nl_ctx *fnc = THREAD_ARG(t); | |
473 | ssize_t rv; | |
474 | ||
475 | /* Let's ignore the input at the moment. */ | |
476 | rv = stream_read_try(fnc->ibuf, fnc->socket, | |
477 | STREAM_WRITEABLE(fnc->ibuf)); | |
478 | if (rv == 0) { | |
c871e6c9 RZ |
479 | atomic_fetch_add_explicit(&fnc->counters.connection_closes, 1, |
480 | memory_order_relaxed); | |
e5e444d8 RZ |
481 | |
482 | if (IS_ZEBRA_DEBUG_FPM) | |
483 | zlog_debug("%s: connection closed", __func__); | |
484 | ||
a2032324 | 485 | FPM_RECONNECT(fnc); |
d35f447d RZ |
486 | return 0; |
487 | } | |
488 | if (rv == -1) { | |
489 | if (errno == EAGAIN || errno == EWOULDBLOCK | |
490 | || errno == EINTR) | |
491 | return 0; | |
492 | ||
c871e6c9 RZ |
493 | atomic_fetch_add_explicit(&fnc->counters.connection_errors, 1, |
494 | memory_order_relaxed); | |
e5e444d8 RZ |
495 | zlog_warn("%s: connection failure: %s", __func__, |
496 | strerror(errno)); | |
a2032324 | 497 | FPM_RECONNECT(fnc); |
d35f447d RZ |
498 | return 0; |
499 | } | |
500 | stream_reset(fnc->ibuf); | |
501 | ||
6cc059cd | 502 | /* Account all bytes read. */ |
c871e6c9 RZ |
503 | atomic_fetch_add_explicit(&fnc->counters.bytes_read, rv, |
504 | memory_order_relaxed); | |
6cc059cd | 505 | |
d35f447d RZ |
506 | thread_add_read(fnc->fthread->master, fpm_read, fnc, fnc->socket, |
507 | &fnc->t_read); | |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
512 | static int fpm_write(struct thread *t) | |
513 | { | |
514 | struct fpm_nl_ctx *fnc = THREAD_ARG(t); | |
515 | socklen_t statuslen; | |
516 | ssize_t bwritten; | |
517 | int rv, status; | |
518 | size_t btotal; | |
519 | ||
520 | if (fnc->connecting == true) { | |
521 | status = 0; | |
522 | statuslen = sizeof(status); | |
523 | ||
524 | rv = getsockopt(fnc->socket, SOL_SOCKET, SO_ERROR, &status, | |
525 | &statuslen); | |
526 | if (rv == -1 || status != 0) { | |
527 | if (rv != -1) | |
e5e444d8 RZ |
528 | zlog_warn("%s: connection failed: %s", __func__, |
529 | strerror(status)); | |
d35f447d | 530 | else |
e5e444d8 RZ |
531 | zlog_warn("%s: SO_ERROR failed: %s", __func__, |
532 | strerror(status)); | |
d35f447d | 533 | |
c871e6c9 RZ |
534 | atomic_fetch_add_explicit( |
535 | &fnc->counters.connection_errors, 1, | |
536 | memory_order_relaxed); | |
6cc059cd | 537 | |
a2032324 | 538 | FPM_RECONNECT(fnc); |
d35f447d RZ |
539 | return 0; |
540 | } | |
541 | ||
542 | fnc->connecting = false; | |
018e77bc | 543 | |
b55ab92a RZ |
544 | /* |
545 | * Walk the route tables to send old information before starting | |
546 | * to send updated information. | |
547 | * | |
548 | * NOTE 1: | |
549 | * RIB table walk is called after the next group table walk | |
550 | * ends. | |
551 | * | |
552 | * NOTE 2: | |
553 | * Don't attempt to go through next hop group table if we were | |
554 | * explictly told to not use it. | |
555 | */ | |
556 | if (fnc->use_nhg) | |
557 | thread_add_timer(zrouter.master, fpm_nhg_send, fnc, 0, | |
558 | &fnc->t_nhgwalk); | |
559 | else | |
560 | thread_add_timer(zrouter.master, fpm_rib_send, fnc, 0, | |
561 | &fnc->t_ribwalk); | |
562 | ||
bda10adf RZ |
563 | thread_add_timer(zrouter.master, fpm_rmac_send, fnc, 0, |
564 | &fnc->t_rmacwalk); | |
d35f447d RZ |
565 | } |
566 | ||
567 | frr_mutex_lock_autounlock(&fnc->obuf_mutex); | |
568 | ||
569 | while (true) { | |
570 | /* Stream is empty: reset pointers and return. */ | |
571 | if (STREAM_READABLE(fnc->obuf) == 0) { | |
572 | stream_reset(fnc->obuf); | |
573 | break; | |
574 | } | |
575 | ||
576 | /* Try to write all at once. */ | |
577 | btotal = stream_get_endp(fnc->obuf) - | |
578 | stream_get_getp(fnc->obuf); | |
579 | bwritten = write(fnc->socket, stream_pnt(fnc->obuf), btotal); | |
580 | if (bwritten == 0) { | |
c871e6c9 RZ |
581 | atomic_fetch_add_explicit( |
582 | &fnc->counters.connection_closes, 1, | |
583 | memory_order_relaxed); | |
e5e444d8 RZ |
584 | |
585 | if (IS_ZEBRA_DEBUG_FPM) | |
586 | zlog_debug("%s: connection closed", __func__); | |
d35f447d RZ |
587 | break; |
588 | } | |
589 | if (bwritten == -1) { | |
ad4d1022 RZ |
590 | /* Attempt to continue if blocked by a signal. */ |
591 | if (errno == EINTR) | |
592 | continue; | |
593 | /* Receiver is probably slow, lets give it some time. */ | |
594 | if (errno == EAGAIN || errno == EWOULDBLOCK) | |
d35f447d RZ |
595 | break; |
596 | ||
c871e6c9 RZ |
597 | atomic_fetch_add_explicit( |
598 | &fnc->counters.connection_errors, 1, | |
599 | memory_order_relaxed); | |
e5e444d8 RZ |
600 | zlog_warn("%s: connection failure: %s", __func__, |
601 | strerror(errno)); | |
a2032324 RZ |
602 | |
603 | FPM_RECONNECT(fnc); | |
604 | return 0; | |
d35f447d RZ |
605 | } |
606 | ||
6cc059cd | 607 | /* Account all bytes sent. */ |
c871e6c9 RZ |
608 | atomic_fetch_add_explicit(&fnc->counters.bytes_sent, bwritten, |
609 | memory_order_relaxed); | |
6cc059cd | 610 | |
ad4d1022 | 611 | /* Account number of bytes free. */ |
c871e6c9 RZ |
612 | atomic_fetch_sub_explicit(&fnc->counters.obuf_bytes, bwritten, |
613 | memory_order_relaxed); | |
ad4d1022 | 614 | |
d35f447d RZ |
615 | stream_forward_getp(fnc->obuf, (size_t)bwritten); |
616 | } | |
617 | ||
618 | /* Stream is not empty yet, we must schedule more writes. */ | |
619 | if (STREAM_READABLE(fnc->obuf)) { | |
ad4d1022 | 620 | stream_pulldown(fnc->obuf); |
d35f447d RZ |
621 | thread_add_write(fnc->fthread->master, fpm_write, fnc, |
622 | fnc->socket, &fnc->t_write); | |
623 | return 0; | |
624 | } | |
625 | ||
626 | return 0; | |
627 | } | |
628 | ||
629 | static int fpm_connect(struct thread *t) | |
630 | { | |
631 | struct fpm_nl_ctx *fnc = THREAD_ARG(t); | |
3bdd7fca RZ |
632 | struct sockaddr_in *sin = (struct sockaddr_in *)&fnc->addr; |
633 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&fnc->addr; | |
634 | socklen_t slen; | |
d35f447d RZ |
635 | int rv, sock; |
636 | char addrstr[INET6_ADDRSTRLEN]; | |
637 | ||
3bdd7fca | 638 | sock = socket(fnc->addr.ss_family, SOCK_STREAM, 0); |
d35f447d | 639 | if (sock == -1) { |
6cc059cd | 640 | zlog_err("%s: fpm socket failed: %s", __func__, |
d35f447d RZ |
641 | strerror(errno)); |
642 | thread_add_timer(fnc->fthread->master, fpm_connect, fnc, 3, | |
643 | &fnc->t_connect); | |
644 | return 0; | |
645 | } | |
646 | ||
647 | set_nonblocking(sock); | |
648 | ||
3bdd7fca RZ |
649 | if (fnc->addr.ss_family == AF_INET) { |
650 | inet_ntop(AF_INET, &sin->sin_addr, addrstr, sizeof(addrstr)); | |
651 | slen = sizeof(*sin); | |
652 | } else { | |
653 | inet_ntop(AF_INET6, &sin6->sin6_addr, addrstr, sizeof(addrstr)); | |
654 | slen = sizeof(*sin6); | |
655 | } | |
d35f447d | 656 | |
e5e444d8 RZ |
657 | if (IS_ZEBRA_DEBUG_FPM) |
658 | zlog_debug("%s: attempting to connect to %s:%d", __func__, | |
659 | addrstr, ntohs(sin->sin_port)); | |
d35f447d | 660 | |
3bdd7fca | 661 | rv = connect(sock, (struct sockaddr *)&fnc->addr, slen); |
d35f447d | 662 | if (rv == -1 && errno != EINPROGRESS) { |
c871e6c9 RZ |
663 | atomic_fetch_add_explicit(&fnc->counters.connection_errors, 1, |
664 | memory_order_relaxed); | |
d35f447d RZ |
665 | close(sock); |
666 | zlog_warn("%s: fpm connection failed: %s", __func__, | |
667 | strerror(errno)); | |
668 | thread_add_timer(fnc->fthread->master, fpm_connect, fnc, 3, | |
669 | &fnc->t_connect); | |
670 | return 0; | |
671 | } | |
672 | ||
673 | fnc->connecting = (errno == EINPROGRESS); | |
674 | fnc->socket = sock; | |
675 | thread_add_read(fnc->fthread->master, fpm_read, fnc, sock, | |
676 | &fnc->t_read); | |
677 | thread_add_write(fnc->fthread->master, fpm_write, fnc, sock, | |
678 | &fnc->t_write); | |
679 | ||
018e77bc | 680 | /* Mark all routes as unsent. */ |
981ca597 RZ |
681 | thread_add_timer(zrouter.master, fpm_nhg_reset, fnc, 0, |
682 | &fnc->t_nhgreset); | |
018e77bc RZ |
683 | thread_add_timer(zrouter.master, fpm_rib_reset, fnc, 0, |
684 | &fnc->t_ribreset); | |
bda10adf RZ |
685 | thread_add_timer(zrouter.master, fpm_rmac_reset, fnc, 0, |
686 | &fnc->t_rmacreset); | |
018e77bc | 687 | |
d35f447d RZ |
688 | return 0; |
689 | } | |
690 | ||
691 | /** | |
692 | * Encode data plane operation context into netlink and enqueue it in the FPM | |
693 | * output buffer. | |
694 | * | |
695 | * @param fnc the netlink FPM context. | |
696 | * @param ctx the data plane operation context data. | |
697 | * @return 0 on success or -1 on not enough space. | |
698 | */ | |
699 | static int fpm_nl_enqueue(struct fpm_nl_ctx *fnc, struct zebra_dplane_ctx *ctx) | |
700 | { | |
701 | uint8_t nl_buf[NL_PKT_BUF_SIZE]; | |
702 | size_t nl_buf_len; | |
703 | ssize_t rv; | |
edfeff42 | 704 | uint64_t obytes, obytes_peak; |
b55ab92a RZ |
705 | enum dplane_op_e op = dplane_ctx_get_op(ctx); |
706 | ||
707 | /* | |
708 | * If we were configured to not use next hop groups, then quit as soon | |
709 | * as possible. | |
710 | */ | |
711 | if ((!fnc->use_nhg) | |
712 | && (op == DPLANE_OP_NH_DELETE || op == DPLANE_OP_NH_INSTALL | |
713 | || op == DPLANE_OP_NH_UPDATE)) | |
714 | return 0; | |
d35f447d RZ |
715 | |
716 | nl_buf_len = 0; | |
717 | ||
718 | frr_mutex_lock_autounlock(&fnc->obuf_mutex); | |
719 | ||
b55ab92a | 720 | switch (op) { |
d35f447d RZ |
721 | case DPLANE_OP_ROUTE_UPDATE: |
722 | case DPLANE_OP_ROUTE_DELETE: | |
0be6e7d7 JU |
723 | rv = netlink_route_multipath_msg_encode(RTM_DELROUTE, ctx, |
724 | nl_buf, sizeof(nl_buf), | |
725 | true, fnc->use_nhg); | |
d35f447d | 726 | if (rv <= 0) { |
0be6e7d7 JU |
727 | zlog_err( |
728 | "%s: netlink_route_multipath_msg_encode failed", | |
729 | __func__); | |
d35f447d RZ |
730 | return 0; |
731 | } | |
732 | ||
733 | nl_buf_len = (size_t)rv; | |
d35f447d RZ |
734 | |
735 | /* UPDATE operations need a INSTALL, otherwise just quit. */ | |
b55ab92a | 736 | if (op == DPLANE_OP_ROUTE_DELETE) |
d35f447d RZ |
737 | break; |
738 | ||
739 | /* FALL THROUGH */ | |
740 | case DPLANE_OP_ROUTE_INSTALL: | |
0be6e7d7 | 741 | rv = netlink_route_multipath_msg_encode( |
b55ab92a RZ |
742 | RTM_NEWROUTE, ctx, &nl_buf[nl_buf_len], |
743 | sizeof(nl_buf) - nl_buf_len, true, fnc->use_nhg); | |
d35f447d | 744 | if (rv <= 0) { |
0be6e7d7 JU |
745 | zlog_err( |
746 | "%s: netlink_route_multipath_msg_encode failed", | |
747 | __func__); | |
d35f447d RZ |
748 | return 0; |
749 | } | |
750 | ||
751 | nl_buf_len += (size_t)rv; | |
d35f447d RZ |
752 | break; |
753 | ||
bda10adf RZ |
754 | case DPLANE_OP_MAC_INSTALL: |
755 | case DPLANE_OP_MAC_DELETE: | |
756 | rv = netlink_macfdb_update_ctx(ctx, nl_buf, sizeof(nl_buf)); | |
757 | if (rv <= 0) { | |
e5e444d8 RZ |
758 | zlog_err("%s: netlink_macfdb_update_ctx failed", |
759 | __func__); | |
bda10adf RZ |
760 | return 0; |
761 | } | |
762 | ||
763 | nl_buf_len = (size_t)rv; | |
bda10adf RZ |
764 | break; |
765 | ||
e9a1cd93 | 766 | case DPLANE_OP_NH_DELETE: |
0be6e7d7 JU |
767 | rv = netlink_nexthop_msg_encode(RTM_DELNEXTHOP, ctx, nl_buf, |
768 | sizeof(nl_buf)); | |
e9a1cd93 | 769 | if (rv <= 0) { |
0be6e7d7 JU |
770 | zlog_err("%s: netlink_nexthop_msg_encode failed", |
771 | __func__); | |
e9a1cd93 RZ |
772 | return 0; |
773 | } | |
774 | ||
775 | nl_buf_len = (size_t)rv; | |
776 | break; | |
d35f447d RZ |
777 | case DPLANE_OP_NH_INSTALL: |
778 | case DPLANE_OP_NH_UPDATE: | |
0be6e7d7 JU |
779 | rv = netlink_nexthop_msg_encode(RTM_NEWNEXTHOP, ctx, nl_buf, |
780 | sizeof(nl_buf)); | |
e9a1cd93 | 781 | if (rv <= 0) { |
0be6e7d7 JU |
782 | zlog_err("%s: netlink_nexthop_msg_encode failed", |
783 | __func__); | |
e9a1cd93 RZ |
784 | return 0; |
785 | } | |
786 | ||
787 | nl_buf_len = (size_t)rv; | |
788 | break; | |
789 | ||
d35f447d RZ |
790 | case DPLANE_OP_LSP_INSTALL: |
791 | case DPLANE_OP_LSP_UPDATE: | |
792 | case DPLANE_OP_LSP_DELETE: | |
793 | case DPLANE_OP_PW_INSTALL: | |
794 | case DPLANE_OP_PW_UNINSTALL: | |
795 | case DPLANE_OP_ADDR_INSTALL: | |
796 | case DPLANE_OP_ADDR_UNINSTALL: | |
d35f447d RZ |
797 | case DPLANE_OP_NEIGH_INSTALL: |
798 | case DPLANE_OP_NEIGH_UPDATE: | |
799 | case DPLANE_OP_NEIGH_DELETE: | |
800 | case DPLANE_OP_VTEP_ADD: | |
801 | case DPLANE_OP_VTEP_DELETE: | |
802 | case DPLANE_OP_SYS_ROUTE_ADD: | |
803 | case DPLANE_OP_SYS_ROUTE_DELETE: | |
804 | case DPLANE_OP_ROUTE_NOTIFY: | |
805 | case DPLANE_OP_LSP_NOTIFY: | |
806 | case DPLANE_OP_NONE: | |
807 | break; | |
808 | ||
809 | default: | |
e5e444d8 RZ |
810 | if (IS_ZEBRA_DEBUG_FPM) |
811 | zlog_debug("%s: unhandled data plane message (%d) %s", | |
812 | __func__, dplane_ctx_get_op(ctx), | |
813 | dplane_op2str(dplane_ctx_get_op(ctx))); | |
d35f447d RZ |
814 | break; |
815 | } | |
816 | ||
817 | /* Skip empty enqueues. */ | |
818 | if (nl_buf_len == 0) | |
819 | return 0; | |
820 | ||
a179ba35 RZ |
821 | /* We must know if someday a message goes beyond 65KiB. */ |
822 | assert((nl_buf_len + FPM_HEADER_SIZE) <= UINT16_MAX); | |
823 | ||
824 | /* Check if we have enough buffer space. */ | |
825 | if (STREAM_WRITEABLE(fnc->obuf) < (nl_buf_len + FPM_HEADER_SIZE)) { | |
c871e6c9 RZ |
826 | atomic_fetch_add_explicit(&fnc->counters.buffer_full, 1, |
827 | memory_order_relaxed); | |
e5e444d8 RZ |
828 | |
829 | if (IS_ZEBRA_DEBUG_FPM) | |
830 | zlog_debug( | |
831 | "%s: buffer full: wants to write %zu but has %zu", | |
832 | __func__, nl_buf_len + FPM_HEADER_SIZE, | |
833 | STREAM_WRITEABLE(fnc->obuf)); | |
834 | ||
a179ba35 RZ |
835 | return -1; |
836 | } | |
837 | ||
d35f447d | 838 | /* |
a179ba35 RZ |
839 | * Fill in the FPM header information. |
840 | * | |
841 | * See FPM_HEADER_SIZE definition for more information. | |
d35f447d RZ |
842 | */ |
843 | stream_putc(fnc->obuf, 1); | |
844 | stream_putc(fnc->obuf, 1); | |
a179ba35 | 845 | stream_putw(fnc->obuf, nl_buf_len + FPM_HEADER_SIZE); |
d35f447d RZ |
846 | |
847 | /* Write current data. */ | |
848 | stream_write(fnc->obuf, nl_buf, (size_t)nl_buf_len); | |
849 | ||
ad4d1022 | 850 | /* Account number of bytes waiting to be written. */ |
c871e6c9 RZ |
851 | atomic_fetch_add_explicit(&fnc->counters.obuf_bytes, |
852 | nl_buf_len + FPM_HEADER_SIZE, | |
853 | memory_order_relaxed); | |
edfeff42 RZ |
854 | obytes = atomic_load_explicit(&fnc->counters.obuf_bytes, |
855 | memory_order_relaxed); | |
856 | obytes_peak = atomic_load_explicit(&fnc->counters.obuf_peak, | |
857 | memory_order_relaxed); | |
858 | if (obytes_peak < obytes) | |
c871e6c9 RZ |
859 | atomic_store_explicit(&fnc->counters.obuf_peak, obytes, |
860 | memory_order_relaxed); | |
ad4d1022 | 861 | |
d35f447d RZ |
862 | /* Tell the thread to start writing. */ |
863 | thread_add_write(fnc->fthread->master, fpm_write, fnc, fnc->socket, | |
864 | &fnc->t_write); | |
865 | ||
866 | return 0; | |
867 | } | |
868 | ||
981ca597 RZ |
869 | /* |
870 | * Next hop walk/send functions. | |
871 | */ | |
872 | struct fpm_nhg_arg { | |
873 | struct zebra_dplane_ctx *ctx; | |
874 | struct fpm_nl_ctx *fnc; | |
875 | bool complete; | |
876 | }; | |
877 | ||
878 | static int fpm_nhg_send_cb(struct hash_bucket *bucket, void *arg) | |
879 | { | |
880 | struct nhg_hash_entry *nhe = bucket->data; | |
881 | struct fpm_nhg_arg *fna = arg; | |
882 | ||
883 | /* This entry was already sent, skip it. */ | |
884 | if (CHECK_FLAG(nhe->flags, NEXTHOP_GROUP_FPM)) | |
885 | return HASHWALK_CONTINUE; | |
886 | ||
887 | /* Reset ctx to reuse allocated memory, take a snapshot and send it. */ | |
888 | dplane_ctx_reset(fna->ctx); | |
889 | dplane_ctx_nexthop_init(fna->ctx, DPLANE_OP_NH_INSTALL, nhe); | |
890 | if (fpm_nl_enqueue(fna->fnc, fna->ctx) == -1) { | |
891 | /* Our buffers are full, lets give it some cycles. */ | |
892 | fna->complete = false; | |
893 | return HASHWALK_ABORT; | |
894 | } | |
895 | ||
896 | /* Mark group as sent, so it doesn't get sent again. */ | |
897 | SET_FLAG(nhe->flags, NEXTHOP_GROUP_FPM); | |
898 | ||
899 | return HASHWALK_CONTINUE; | |
900 | } | |
901 | ||
902 | static int fpm_nhg_send(struct thread *t) | |
903 | { | |
904 | struct fpm_nl_ctx *fnc = THREAD_ARG(t); | |
905 | struct fpm_nhg_arg fna; | |
906 | ||
907 | fna.fnc = fnc; | |
908 | fna.ctx = dplane_ctx_alloc(); | |
909 | fna.complete = true; | |
910 | ||
911 | /* Send next hops. */ | |
912 | hash_walk(zrouter.nhgs_id, fpm_nhg_send_cb, &fna); | |
913 | ||
914 | /* `free()` allocated memory. */ | |
915 | dplane_ctx_fini(&fna.ctx); | |
916 | ||
917 | /* We are done sending next hops, lets install the routes now. */ | |
918 | if (fna.complete) | |
919 | thread_add_timer(zrouter.master, fpm_rib_send, fnc, 0, | |
920 | &fnc->t_ribwalk); | |
921 | else /* Otherwise reschedule next hop group again. */ | |
922 | thread_add_timer(zrouter.master, fpm_nhg_send, fnc, 0, | |
923 | &fnc->t_nhgwalk); | |
924 | ||
925 | return 0; | |
926 | } | |
927 | ||
018e77bc RZ |
928 | /** |
929 | * Send all RIB installed routes to the connected data plane. | |
930 | */ | |
931 | static int fpm_rib_send(struct thread *t) | |
932 | { | |
933 | struct fpm_nl_ctx *fnc = THREAD_ARG(t); | |
934 | rib_dest_t *dest; | |
935 | struct route_node *rn; | |
936 | struct route_table *rt; | |
937 | struct zebra_dplane_ctx *ctx; | |
938 | rib_tables_iter_t rt_iter; | |
939 | ||
940 | /* Allocate temporary context for all transactions. */ | |
941 | ctx = dplane_ctx_alloc(); | |
942 | ||
943 | rt_iter.state = RIB_TABLES_ITER_S_INIT; | |
944 | while ((rt = rib_tables_iter_next(&rt_iter))) { | |
945 | for (rn = route_top(rt); rn; rn = srcdest_route_next(rn)) { | |
946 | dest = rib_dest_from_rnode(rn); | |
947 | /* Skip bad route entries. */ | |
a50404aa | 948 | if (dest == NULL || dest->selected_fib == NULL) |
018e77bc | 949 | continue; |
018e77bc RZ |
950 | |
951 | /* Check for already sent routes. */ | |
a50404aa | 952 | if (CHECK_FLAG(dest->flags, RIB_DEST_UPDATE_FPM)) |
018e77bc | 953 | continue; |
018e77bc RZ |
954 | |
955 | /* Enqueue route install. */ | |
956 | dplane_ctx_reset(ctx); | |
957 | dplane_ctx_route_init(ctx, DPLANE_OP_ROUTE_INSTALL, rn, | |
958 | dest->selected_fib); | |
959 | if (fpm_nl_enqueue(fnc, ctx) == -1) { | |
960 | /* Free the temporary allocated context. */ | |
961 | dplane_ctx_fini(&ctx); | |
962 | ||
018e77bc RZ |
963 | thread_add_timer(zrouter.master, fpm_rib_send, |
964 | fnc, 1, &fnc->t_ribwalk); | |
965 | return 0; | |
966 | } | |
967 | ||
968 | /* Mark as sent. */ | |
969 | SET_FLAG(dest->flags, RIB_DEST_UPDATE_FPM); | |
970 | } | |
971 | } | |
972 | ||
973 | /* Free the temporary allocated context. */ | |
974 | dplane_ctx_fini(&ctx); | |
975 | ||
976 | /* All RIB routes sent! */ | |
977 | fnc->rib_complete = true; | |
978 | ||
979 | return 0; | |
980 | } | |
981 | ||
bda10adf RZ |
982 | /* |
983 | * The next three functions will handle RMAC enqueue. | |
984 | */ | |
985 | struct fpm_rmac_arg { | |
986 | struct zebra_dplane_ctx *ctx; | |
987 | struct fpm_nl_ctx *fnc; | |
988 | zebra_l3vni_t *zl3vni; | |
989 | }; | |
990 | ||
9d5c3268 | 991 | static void fpm_enqueue_rmac_table(struct hash_bucket *backet, void *arg) |
bda10adf RZ |
992 | { |
993 | struct fpm_rmac_arg *fra = arg; | |
994 | zebra_mac_t *zrmac = backet->data; | |
995 | struct zebra_if *zif = fra->zl3vni->vxlan_if->info; | |
996 | const struct zebra_l2info_vxlan *vxl = &zif->l2info.vxl; | |
997 | struct zebra_if *br_zif; | |
998 | vlanid_t vid; | |
999 | bool sticky; | |
1000 | ||
1001 | /* Entry already sent. */ | |
1002 | if (CHECK_FLAG(zrmac->flags, ZEBRA_MAC_FPM_SENT)) | |
1003 | return; | |
1004 | ||
1005 | sticky = !!CHECK_FLAG(zrmac->flags, | |
1006 | (ZEBRA_MAC_STICKY | ZEBRA_MAC_REMOTE_DEF_GW)); | |
1007 | br_zif = (struct zebra_if *)(zif->brslave_info.br_if->info); | |
1008 | vid = IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif) ? vxl->access_vlan : 0; | |
1009 | ||
1010 | dplane_ctx_reset(fra->ctx); | |
1011 | dplane_ctx_set_op(fra->ctx, DPLANE_OP_MAC_INSTALL); | |
1012 | dplane_mac_init(fra->ctx, fra->zl3vni->vxlan_if, | |
f2a0ba3a RZ |
1013 | zif->brslave_info.br_if, vid, |
1014 | &zrmac->macaddr, zrmac->fwd_info.r_vtep_ip, sticky); | |
bda10adf | 1015 | if (fpm_nl_enqueue(fra->fnc, fra->ctx) == -1) { |
bda10adf RZ |
1016 | thread_add_timer(zrouter.master, fpm_rmac_send, |
1017 | fra->fnc, 1, &fra->fnc->t_rmacwalk); | |
1018 | } | |
1019 | } | |
1020 | ||
9d5c3268 | 1021 | static void fpm_enqueue_l3vni_table(struct hash_bucket *backet, void *arg) |
bda10adf RZ |
1022 | { |
1023 | struct fpm_rmac_arg *fra = arg; | |
1024 | zebra_l3vni_t *zl3vni = backet->data; | |
1025 | ||
1026 | fra->zl3vni = zl3vni; | |
1027 | hash_iterate(zl3vni->rmac_table, fpm_enqueue_rmac_table, zl3vni); | |
1028 | } | |
1029 | ||
1030 | static int fpm_rmac_send(struct thread *t) | |
1031 | { | |
1032 | struct fpm_rmac_arg fra; | |
1033 | ||
1034 | fra.fnc = THREAD_ARG(t); | |
1035 | fra.ctx = dplane_ctx_alloc(); | |
1036 | hash_iterate(zrouter.l3vni_table, fpm_enqueue_l3vni_table, &fra); | |
1037 | dplane_ctx_fini(&fra.ctx); | |
1038 | ||
1039 | return 0; | |
1040 | } | |
1041 | ||
981ca597 RZ |
1042 | /* |
1043 | * Resets the next hop FPM flags so we send all next hops again. | |
1044 | */ | |
1045 | static void fpm_nhg_reset_cb(struct hash_bucket *bucket, void *arg) | |
1046 | { | |
1047 | struct nhg_hash_entry *nhe = bucket->data; | |
1048 | ||
1049 | /* Unset FPM installation flag so it gets installed again. */ | |
1050 | UNSET_FLAG(nhe->flags, NEXTHOP_GROUP_FPM); | |
1051 | } | |
1052 | ||
1053 | static int fpm_nhg_reset(struct thread *t) | |
1054 | { | |
1055 | hash_iterate(zrouter.nhgs_id, fpm_nhg_reset_cb, NULL); | |
1056 | return 0; | |
1057 | } | |
1058 | ||
018e77bc RZ |
1059 | /** |
1060 | * Resets the RIB FPM flags so we send all routes again. | |
1061 | */ | |
1062 | static int fpm_rib_reset(struct thread *t) | |
1063 | { | |
1064 | struct fpm_nl_ctx *fnc = THREAD_ARG(t); | |
1065 | rib_dest_t *dest; | |
1066 | struct route_node *rn; | |
1067 | struct route_table *rt; | |
1068 | rib_tables_iter_t rt_iter; | |
1069 | ||
1070 | fnc->rib_complete = false; | |
1071 | ||
1072 | rt_iter.state = RIB_TABLES_ITER_S_INIT; | |
1073 | while ((rt = rib_tables_iter_next(&rt_iter))) { | |
1074 | for (rn = route_top(rt); rn; rn = srcdest_route_next(rn)) { | |
1075 | dest = rib_dest_from_rnode(rn); | |
1076 | /* Skip bad route entries. */ | |
1077 | if (dest == NULL) | |
1078 | continue; | |
1079 | ||
1080 | UNSET_FLAG(dest->flags, RIB_DEST_UPDATE_FPM); | |
1081 | } | |
1082 | } | |
1083 | ||
1084 | return 0; | |
1085 | } | |
1086 | ||
bda10adf RZ |
1087 | /* |
1088 | * The next three function will handle RMAC table reset. | |
1089 | */ | |
9d5c3268 | 1090 | static void fpm_unset_rmac_table(struct hash_bucket *backet, void *arg) |
bda10adf RZ |
1091 | { |
1092 | zebra_mac_t *zrmac = backet->data; | |
1093 | ||
1094 | UNSET_FLAG(zrmac->flags, ZEBRA_MAC_FPM_SENT); | |
1095 | } | |
1096 | ||
9d5c3268 | 1097 | static void fpm_unset_l3vni_table(struct hash_bucket *backet, void *arg) |
bda10adf RZ |
1098 | { |
1099 | zebra_l3vni_t *zl3vni = backet->data; | |
1100 | ||
1101 | hash_iterate(zl3vni->rmac_table, fpm_unset_rmac_table, zl3vni); | |
1102 | } | |
1103 | ||
1104 | static int fpm_rmac_reset(struct thread *t) | |
1105 | { | |
1106 | hash_iterate(zrouter.l3vni_table, fpm_unset_l3vni_table, NULL); | |
1107 | ||
1108 | return 0; | |
1109 | } | |
1110 | ||
ba803a2f RZ |
1111 | static int fpm_process_queue(struct thread *t) |
1112 | { | |
1113 | struct fpm_nl_ctx *fnc = THREAD_ARG(t); | |
1114 | struct zebra_dplane_ctx *ctx; | |
1115 | ||
1116 | frr_mutex_lock_autounlock(&fnc->ctxqueue_mutex); | |
1117 | ||
1118 | while (true) { | |
1119 | /* No space available yet. */ | |
1120 | if (STREAM_WRITEABLE(fnc->obuf) < NL_PKT_BUF_SIZE) | |
1121 | break; | |
1122 | ||
1123 | /* Dequeue next item or quit processing. */ | |
1124 | ctx = dplane_ctx_dequeue(&fnc->ctxqueue); | |
1125 | if (ctx == NULL) | |
1126 | break; | |
1127 | ||
1128 | fpm_nl_enqueue(fnc, ctx); | |
1129 | ||
1130 | /* Account the processed entries. */ | |
c871e6c9 RZ |
1131 | atomic_fetch_add_explicit(&fnc->counters.dplane_contexts, 1, |
1132 | memory_order_relaxed); | |
1133 | atomic_fetch_sub_explicit(&fnc->counters.ctxqueue_len, 1, | |
1134 | memory_order_relaxed); | |
ba803a2f RZ |
1135 | |
1136 | dplane_ctx_set_status(ctx, ZEBRA_DPLANE_REQUEST_SUCCESS); | |
1137 | dplane_provider_enqueue_out_ctx(fnc->prov, ctx); | |
1138 | } | |
1139 | ||
1140 | /* Check for more items in the queue. */ | |
c871e6c9 RZ |
1141 | if (atomic_load_explicit(&fnc->counters.ctxqueue_len, |
1142 | memory_order_relaxed) | |
1143 | > 0) | |
ba803a2f RZ |
1144 | thread_add_timer(fnc->fthread->master, fpm_process_queue, |
1145 | fnc, 0, &fnc->t_dequeue); | |
1146 | ||
1147 | return 0; | |
1148 | } | |
1149 | ||
3bdd7fca RZ |
1150 | /** |
1151 | * Handles external (e.g. CLI, data plane or others) events. | |
1152 | */ | |
1153 | static int fpm_process_event(struct thread *t) | |
1154 | { | |
1155 | struct fpm_nl_ctx *fnc = THREAD_ARG(t); | |
1156 | int event = THREAD_VAL(t); | |
1157 | ||
1158 | switch (event) { | |
1159 | case FNE_DISABLE: | |
e5e444d8 | 1160 | zlog_info("%s: manual FPM disable event", __func__); |
3bdd7fca | 1161 | fnc->disabled = true; |
c871e6c9 RZ |
1162 | atomic_fetch_add_explicit(&fnc->counters.user_disables, 1, |
1163 | memory_order_relaxed); | |
3bdd7fca RZ |
1164 | |
1165 | /* Call reconnect to disable timers and clean up context. */ | |
1166 | fpm_reconnect(fnc); | |
1167 | break; | |
1168 | ||
1169 | case FNE_RECONNECT: | |
e5e444d8 | 1170 | zlog_info("%s: manual FPM reconnect event", __func__); |
3bdd7fca | 1171 | fnc->disabled = false; |
c871e6c9 RZ |
1172 | atomic_fetch_add_explicit(&fnc->counters.user_configures, 1, |
1173 | memory_order_relaxed); | |
3bdd7fca RZ |
1174 | fpm_reconnect(fnc); |
1175 | break; | |
1176 | ||
6cc059cd | 1177 | case FNE_RESET_COUNTERS: |
e5e444d8 | 1178 | zlog_info("%s: manual FPM counters reset event", __func__); |
6cc059cd RZ |
1179 | memset(&fnc->counters, 0, sizeof(fnc->counters)); |
1180 | break; | |
1181 | ||
b55ab92a RZ |
1182 | case FNE_TOGGLE_NHG: |
1183 | zlog_info("%s: toggle next hop groups support", __func__); | |
1184 | fnc->use_nhg = !fnc->use_nhg; | |
1185 | fpm_reconnect(fnc); | |
1186 | break; | |
1187 | ||
a2032324 RZ |
1188 | case FNE_INTERNAL_RECONNECT: |
1189 | fpm_reconnect(fnc); | |
1190 | break; | |
1191 | ||
3bdd7fca | 1192 | default: |
e5e444d8 RZ |
1193 | if (IS_ZEBRA_DEBUG_FPM) |
1194 | zlog_debug("%s: unhandled event %d", __func__, event); | |
3bdd7fca RZ |
1195 | break; |
1196 | } | |
1197 | ||
1198 | return 0; | |
1199 | } | |
1200 | ||
d35f447d RZ |
1201 | /* |
1202 | * Data plane functions. | |
1203 | */ | |
1204 | static int fpm_nl_start(struct zebra_dplane_provider *prov) | |
1205 | { | |
1206 | struct fpm_nl_ctx *fnc; | |
1207 | ||
1208 | fnc = dplane_provider_get_data(prov); | |
1209 | fnc->fthread = frr_pthread_new(NULL, prov_name, prov_name); | |
1210 | assert(frr_pthread_run(fnc->fthread, NULL) == 0); | |
1211 | fnc->ibuf = stream_new(NL_PKT_BUF_SIZE); | |
1212 | fnc->obuf = stream_new(NL_PKT_BUF_SIZE * 128); | |
1213 | pthread_mutex_init(&fnc->obuf_mutex, NULL); | |
1214 | fnc->socket = -1; | |
3bdd7fca | 1215 | fnc->disabled = true; |
ba803a2f RZ |
1216 | fnc->prov = prov; |
1217 | TAILQ_INIT(&fnc->ctxqueue); | |
1218 | pthread_mutex_init(&fnc->ctxqueue_mutex, NULL); | |
d35f447d | 1219 | |
b55ab92a RZ |
1220 | /* Set default values. */ |
1221 | fnc->use_nhg = true; | |
1222 | ||
d35f447d RZ |
1223 | return 0; |
1224 | } | |
1225 | ||
98a87504 | 1226 | static int fpm_nl_finish_early(struct fpm_nl_ctx *fnc) |
d35f447d | 1227 | { |
98a87504 | 1228 | /* Disable all events and close socket. */ |
981ca597 RZ |
1229 | THREAD_OFF(fnc->t_nhgreset); |
1230 | THREAD_OFF(fnc->t_nhgwalk); | |
98a87504 RZ |
1231 | THREAD_OFF(fnc->t_ribreset); |
1232 | THREAD_OFF(fnc->t_ribwalk); | |
1233 | THREAD_OFF(fnc->t_rmacreset); | |
1234 | THREAD_OFF(fnc->t_rmacwalk); | |
1235 | thread_cancel_async(fnc->fthread->master, &fnc->t_read, NULL); | |
1236 | thread_cancel_async(fnc->fthread->master, &fnc->t_write, NULL); | |
1237 | thread_cancel_async(fnc->fthread->master, &fnc->t_connect, NULL); | |
d35f447d | 1238 | |
98a87504 RZ |
1239 | if (fnc->socket != -1) { |
1240 | close(fnc->socket); | |
1241 | fnc->socket = -1; | |
1242 | } | |
1243 | ||
1244 | return 0; | |
1245 | } | |
1246 | ||
1247 | static int fpm_nl_finish_late(struct fpm_nl_ctx *fnc) | |
1248 | { | |
1249 | /* Stop the running thread. */ | |
1250 | frr_pthread_stop(fnc->fthread, NULL); | |
1251 | ||
1252 | /* Free all allocated resources. */ | |
1253 | pthread_mutex_destroy(&fnc->obuf_mutex); | |
1254 | pthread_mutex_destroy(&fnc->ctxqueue_mutex); | |
d35f447d RZ |
1255 | stream_free(fnc->ibuf); |
1256 | stream_free(fnc->obuf); | |
98a87504 RZ |
1257 | free(gfnc); |
1258 | gfnc = NULL; | |
d35f447d RZ |
1259 | |
1260 | return 0; | |
1261 | } | |
1262 | ||
98a87504 RZ |
1263 | static int fpm_nl_finish(struct zebra_dplane_provider *prov, bool early) |
1264 | { | |
1265 | struct fpm_nl_ctx *fnc; | |
1266 | ||
1267 | fnc = dplane_provider_get_data(prov); | |
1268 | if (early) | |
1269 | return fpm_nl_finish_early(fnc); | |
1270 | ||
1271 | return fpm_nl_finish_late(fnc); | |
1272 | } | |
1273 | ||
d35f447d RZ |
1274 | static int fpm_nl_process(struct zebra_dplane_provider *prov) |
1275 | { | |
1276 | struct zebra_dplane_ctx *ctx; | |
1277 | struct fpm_nl_ctx *fnc; | |
1278 | int counter, limit; | |
edfeff42 | 1279 | uint64_t cur_queue, peak_queue; |
d35f447d RZ |
1280 | |
1281 | fnc = dplane_provider_get_data(prov); | |
1282 | limit = dplane_provider_get_work_limit(prov); | |
1283 | for (counter = 0; counter < limit; counter++) { | |
1284 | ctx = dplane_provider_dequeue_in_ctx(prov); | |
1285 | if (ctx == NULL) | |
1286 | break; | |
1287 | ||
1288 | /* | |
1289 | * Skip all notifications if not connected, we'll walk the RIB | |
1290 | * anyway. | |
1291 | */ | |
6cc059cd | 1292 | if (fnc->socket != -1 && fnc->connecting == false) { |
ba803a2f RZ |
1293 | frr_mutex_lock_autounlock(&fnc->ctxqueue_mutex); |
1294 | dplane_ctx_enqueue_tail(&fnc->ctxqueue, ctx); | |
1295 | ||
1296 | /* Account the number of contexts. */ | |
c871e6c9 RZ |
1297 | atomic_fetch_add_explicit(&fnc->counters.ctxqueue_len, |
1298 | 1, memory_order_relaxed); | |
1299 | cur_queue = atomic_load_explicit( | |
1300 | &fnc->counters.ctxqueue_len, | |
1301 | memory_order_relaxed); | |
1302 | peak_queue = atomic_load_explicit( | |
1303 | &fnc->counters.ctxqueue_len_peak, | |
1304 | memory_order_relaxed); | |
edfeff42 | 1305 | if (peak_queue < cur_queue) |
c871e6c9 RZ |
1306 | atomic_store_explicit( |
1307 | &fnc->counters.ctxqueue_len_peak, | |
1308 | peak_queue, memory_order_relaxed); | |
ba803a2f | 1309 | continue; |
6cc059cd RZ |
1310 | } |
1311 | ||
d35f447d RZ |
1312 | dplane_ctx_set_status(ctx, ZEBRA_DPLANE_REQUEST_SUCCESS); |
1313 | dplane_provider_enqueue_out_ctx(prov, ctx); | |
1314 | } | |
1315 | ||
c871e6c9 RZ |
1316 | if (atomic_load_explicit(&fnc->counters.ctxqueue_len, |
1317 | memory_order_relaxed) | |
1318 | > 0) | |
ba803a2f RZ |
1319 | thread_add_timer(fnc->fthread->master, fpm_process_queue, |
1320 | fnc, 0, &fnc->t_dequeue); | |
1321 | ||
d35f447d RZ |
1322 | return 0; |
1323 | } | |
1324 | ||
1325 | static int fpm_nl_new(struct thread_master *tm) | |
1326 | { | |
1327 | struct zebra_dplane_provider *prov = NULL; | |
d35f447d RZ |
1328 | int rv; |
1329 | ||
3bdd7fca | 1330 | gfnc = calloc(1, sizeof(*gfnc)); |
d35f447d RZ |
1331 | rv = dplane_provider_register(prov_name, DPLANE_PRIO_POSTPROCESS, |
1332 | DPLANE_PROV_FLAG_THREADED, fpm_nl_start, | |
3bdd7fca | 1333 | fpm_nl_process, fpm_nl_finish, gfnc, |
d35f447d RZ |
1334 | &prov); |
1335 | ||
1336 | if (IS_ZEBRA_DEBUG_DPLANE) | |
1337 | zlog_debug("%s register status: %d", prov_name, rv); | |
1338 | ||
612c2c15 | 1339 | install_node(&fpm_node); |
6cc059cd RZ |
1340 | install_element(ENABLE_NODE, &fpm_show_counters_cmd); |
1341 | install_element(ENABLE_NODE, &fpm_show_counters_json_cmd); | |
1342 | install_element(ENABLE_NODE, &fpm_reset_counters_cmd); | |
3bdd7fca RZ |
1343 | install_element(CONFIG_NODE, &fpm_set_address_cmd); |
1344 | install_element(CONFIG_NODE, &no_fpm_set_address_cmd); | |
b55ab92a RZ |
1345 | install_element(CONFIG_NODE, &fpm_use_nhg_cmd); |
1346 | install_element(CONFIG_NODE, &no_fpm_use_nhg_cmd); | |
3bdd7fca | 1347 | |
d35f447d RZ |
1348 | return 0; |
1349 | } | |
1350 | ||
1351 | static int fpm_nl_init(void) | |
1352 | { | |
1353 | hook_register(frr_late_init, fpm_nl_new); | |
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | FRR_MODULE_SETUP( | |
1358 | .name = "dplane_fpm_nl", | |
1359 | .version = "0.0.1", | |
1360 | .description = "Data plane plugin for FPM using netlink.", | |
1361 | .init = fpm_nl_init, | |
1362 | ) |