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1 | /* | |
2 | * Main implementation file for interface to Forwarding Plane Manager. | |
3 | * | |
4 | * Copyright (C) 2012 by Open Source Routing. | |
5 | * Copyright (C) 2012 by Internet Systems Consortium, Inc. ("ISC") | |
6 | * | |
7 | * This file is part of GNU Zebra. | |
8 | * | |
9 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2, or (at your option) any | |
12 | * later version. | |
13 | * | |
14 | * GNU Zebra is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; see the file COPYING; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
22 | */ | |
23 | ||
24 | #include <zebra.h> | |
25 | ||
26 | #include "log.h" | |
27 | #include "libfrr.h" | |
28 | #include "stream.h" | |
29 | #include "thread.h" | |
30 | #include "network.h" | |
31 | #include "command.h" | |
32 | #include "version.h" | |
33 | #include "jhash.h" | |
34 | ||
35 | #include "zebra/rib.h" | |
36 | #include "zebra/zserv.h" | |
37 | #include "zebra/zebra_ns.h" | |
38 | #include "zebra/zebra_vrf.h" | |
39 | #include "zebra/zebra_errors.h" | |
40 | #include "zebra/zebra_memory.h" | |
41 | ||
42 | #include "fpm/fpm.h" | |
43 | #include "zebra_fpm_private.h" | |
44 | #include "zebra/zebra_router.h" | |
45 | #include "zebra_vxlan_private.h" | |
46 | ||
47 | DEFINE_MTYPE_STATIC(ZEBRA, FPM_MAC_INFO, "FPM_MAC_INFO"); | |
48 | ||
49 | /* | |
50 | * Interval at which we attempt to connect to the FPM. | |
51 | */ | |
52 | #define ZFPM_CONNECT_RETRY_IVL 5 | |
53 | ||
54 | /* | |
55 | * Sizes of outgoing and incoming stream buffers for writing/reading | |
56 | * FPM messages. | |
57 | */ | |
58 | #define ZFPM_OBUF_SIZE (2 * FPM_MAX_MSG_LEN) | |
59 | #define ZFPM_IBUF_SIZE (FPM_MAX_MSG_LEN) | |
60 | ||
61 | /* | |
62 | * The maximum number of times the FPM socket write callback can call | |
63 | * 'write' before it yields. | |
64 | */ | |
65 | #define ZFPM_MAX_WRITES_PER_RUN 10 | |
66 | ||
67 | /* | |
68 | * Interval over which we collect statistics. | |
69 | */ | |
70 | #define ZFPM_STATS_IVL_SECS 10 | |
71 | #define FPM_MAX_MAC_MSG_LEN 512 | |
72 | ||
73 | static void zfpm_iterate_rmac_table(struct hash_backet *backet, void *args); | |
74 | ||
75 | /* | |
76 | * Structure that holds state for iterating over all route_node | |
77 | * structures that are candidates for being communicated to the FPM. | |
78 | */ | |
79 | typedef struct zfpm_rnodes_iter_t_ { | |
80 | rib_tables_iter_t tables_iter; | |
81 | route_table_iter_t iter; | |
82 | } zfpm_rnodes_iter_t; | |
83 | ||
84 | /* | |
85 | * Statistics. | |
86 | */ | |
87 | typedef struct zfpm_stats_t_ { | |
88 | unsigned long connect_calls; | |
89 | unsigned long connect_no_sock; | |
90 | ||
91 | unsigned long read_cb_calls; | |
92 | ||
93 | unsigned long write_cb_calls; | |
94 | unsigned long write_calls; | |
95 | unsigned long partial_writes; | |
96 | unsigned long max_writes_hit; | |
97 | unsigned long t_write_yields; | |
98 | ||
99 | unsigned long nop_deletes_skipped; | |
100 | unsigned long route_adds; | |
101 | unsigned long route_dels; | |
102 | ||
103 | unsigned long updates_triggered; | |
104 | unsigned long redundant_triggers; | |
105 | ||
106 | unsigned long dests_del_after_update; | |
107 | ||
108 | unsigned long t_conn_down_starts; | |
109 | unsigned long t_conn_down_dests_processed; | |
110 | unsigned long t_conn_down_yields; | |
111 | unsigned long t_conn_down_finishes; | |
112 | ||
113 | unsigned long t_conn_up_starts; | |
114 | unsigned long t_conn_up_dests_processed; | |
115 | unsigned long t_conn_up_yields; | |
116 | unsigned long t_conn_up_aborts; | |
117 | unsigned long t_conn_up_finishes; | |
118 | ||
119 | } zfpm_stats_t; | |
120 | ||
121 | /* | |
122 | * States for the FPM state machine. | |
123 | */ | |
124 | typedef enum { | |
125 | ||
126 | /* | |
127 | * In this state we are not yet ready to connect to the FPM. This | |
128 | * can happen when this module is disabled, or if we're cleaning up | |
129 | * after a connection has gone down. | |
130 | */ | |
131 | ZFPM_STATE_IDLE, | |
132 | ||
133 | /* | |
134 | * Ready to talk to the FPM and periodically trying to connect to | |
135 | * it. | |
136 | */ | |
137 | ZFPM_STATE_ACTIVE, | |
138 | ||
139 | /* | |
140 | * In the middle of bringing up a TCP connection. Specifically, | |
141 | * waiting for a connect() call to complete asynchronously. | |
142 | */ | |
143 | ZFPM_STATE_CONNECTING, | |
144 | ||
145 | /* | |
146 | * TCP connection to the FPM is up. | |
147 | */ | |
148 | ZFPM_STATE_ESTABLISHED | |
149 | ||
150 | } zfpm_state_t; | |
151 | ||
152 | /* | |
153 | * Message format to be used to communicate with the FPM. | |
154 | */ | |
155 | typedef enum { | |
156 | ZFPM_MSG_FORMAT_NONE, | |
157 | ZFPM_MSG_FORMAT_NETLINK, | |
158 | ZFPM_MSG_FORMAT_PROTOBUF, | |
159 | } zfpm_msg_format_e; | |
160 | /* | |
161 | * Globals. | |
162 | */ | |
163 | typedef struct zfpm_glob_t_ { | |
164 | ||
165 | /* | |
166 | * True if the FPM module has been enabled. | |
167 | */ | |
168 | int enabled; | |
169 | ||
170 | /* | |
171 | * Message format to be used to communicate with the fpm. | |
172 | */ | |
173 | zfpm_msg_format_e message_format; | |
174 | ||
175 | struct thread_master *master; | |
176 | ||
177 | zfpm_state_t state; | |
178 | ||
179 | in_addr_t fpm_server; | |
180 | /* | |
181 | * Port on which the FPM is running. | |
182 | */ | |
183 | int fpm_port; | |
184 | ||
185 | /* | |
186 | * List of rib_dest_t structures to be processed | |
187 | */ | |
188 | TAILQ_HEAD(zfpm_dest_q, rib_dest_t_) dest_q; | |
189 | ||
190 | /* | |
191 | * List of fpm_mac_info structures to be processed | |
192 | */ | |
193 | TAILQ_HEAD(zfpm_mac_q, fpm_mac_info_t) mac_q; | |
194 | ||
195 | /* | |
196 | * Hash table of fpm_mac_info_t entries | |
197 | * | |
198 | * While adding fpm_mac_info_t for a MAC to the mac_q, | |
199 | * it is possible that another fpm_mac_info_t node for the this MAC | |
200 | * is already present in the queue. | |
201 | * This is possible in the case of consecutive add->delete operations. | |
202 | * To avoid such duplicate insertions in the mac_q, | |
203 | * define a hash table for fpm_mac_info_t which can be looked up | |
204 | * to see if an fpm_mac_info_t node for a MAC is already present | |
205 | * in the mac_q. | |
206 | */ | |
207 | struct hash *fpm_mac_info_table; | |
208 | ||
209 | /* | |
210 | * Stream socket to the FPM. | |
211 | */ | |
212 | int sock; | |
213 | ||
214 | /* | |
215 | * Buffers for messages to/from the FPM. | |
216 | */ | |
217 | struct stream *obuf; | |
218 | struct stream *ibuf; | |
219 | ||
220 | /* | |
221 | * Threads for I/O. | |
222 | */ | |
223 | struct thread *t_connect; | |
224 | struct thread *t_write; | |
225 | struct thread *t_read; | |
226 | ||
227 | /* | |
228 | * Thread to clean up after the TCP connection to the FPM goes down | |
229 | * and the state that belongs to it. | |
230 | */ | |
231 | struct thread *t_conn_down; | |
232 | ||
233 | struct { | |
234 | zfpm_rnodes_iter_t iter; | |
235 | } t_conn_down_state; | |
236 | ||
237 | /* | |
238 | * Thread to take actions once the TCP conn to the FPM comes up, and | |
239 | * the state that belongs to it. | |
240 | */ | |
241 | struct thread *t_conn_up; | |
242 | ||
243 | struct { | |
244 | zfpm_rnodes_iter_t iter; | |
245 | } t_conn_up_state; | |
246 | ||
247 | unsigned long connect_calls; | |
248 | time_t last_connect_call_time; | |
249 | ||
250 | /* | |
251 | * Stats from the start of the current statistics interval up to | |
252 | * now. These are the counters we typically update in the code. | |
253 | */ | |
254 | zfpm_stats_t stats; | |
255 | ||
256 | /* | |
257 | * Statistics that were gathered in the last collection interval. | |
258 | */ | |
259 | zfpm_stats_t last_ivl_stats; | |
260 | ||
261 | /* | |
262 | * Cumulative stats from the last clear to the start of the current | |
263 | * statistics interval. | |
264 | */ | |
265 | zfpm_stats_t cumulative_stats; | |
266 | ||
267 | /* | |
268 | * Stats interval timer. | |
269 | */ | |
270 | struct thread *t_stats; | |
271 | ||
272 | /* | |
273 | * If non-zero, the last time when statistics were cleared. | |
274 | */ | |
275 | time_t last_stats_clear_time; | |
276 | ||
277 | } zfpm_glob_t; | |
278 | ||
279 | static zfpm_glob_t zfpm_glob_space; | |
280 | static zfpm_glob_t *zfpm_g = &zfpm_glob_space; | |
281 | ||
282 | static int zfpm_trigger_update(struct route_node *rn, const char *reason); | |
283 | ||
284 | static int zfpm_read_cb(struct thread *thread); | |
285 | static int zfpm_write_cb(struct thread *thread); | |
286 | ||
287 | static void zfpm_set_state(zfpm_state_t state, const char *reason); | |
288 | static void zfpm_start_connect_timer(const char *reason); | |
289 | static void zfpm_start_stats_timer(void); | |
290 | static void zfpm_mac_info_del(struct fpm_mac_info_t *fpm_mac); | |
291 | ||
292 | /* | |
293 | * zfpm_thread_should_yield | |
294 | */ | |
295 | static inline int zfpm_thread_should_yield(struct thread *t) | |
296 | { | |
297 | return thread_should_yield(t); | |
298 | } | |
299 | ||
300 | /* | |
301 | * zfpm_state_to_str | |
302 | */ | |
303 | static const char *zfpm_state_to_str(zfpm_state_t state) | |
304 | { | |
305 | switch (state) { | |
306 | ||
307 | case ZFPM_STATE_IDLE: | |
308 | return "idle"; | |
309 | ||
310 | case ZFPM_STATE_ACTIVE: | |
311 | return "active"; | |
312 | ||
313 | case ZFPM_STATE_CONNECTING: | |
314 | return "connecting"; | |
315 | ||
316 | case ZFPM_STATE_ESTABLISHED: | |
317 | return "established"; | |
318 | ||
319 | default: | |
320 | return "unknown"; | |
321 | } | |
322 | } | |
323 | ||
324 | /* | |
325 | * zfpm_get_elapsed_time | |
326 | * | |
327 | * Returns the time elapsed (in seconds) since the given time. | |
328 | */ | |
329 | static time_t zfpm_get_elapsed_time(time_t reference) | |
330 | { | |
331 | time_t now; | |
332 | ||
333 | now = monotime(NULL); | |
334 | ||
335 | if (now < reference) { | |
336 | assert(0); | |
337 | return 0; | |
338 | } | |
339 | ||
340 | return now - reference; | |
341 | } | |
342 | ||
343 | /* | |
344 | * zfpm_rnodes_iter_init | |
345 | */ | |
346 | static inline void zfpm_rnodes_iter_init(zfpm_rnodes_iter_t *iter) | |
347 | { | |
348 | memset(iter, 0, sizeof(*iter)); | |
349 | rib_tables_iter_init(&iter->tables_iter); | |
350 | ||
351 | /* | |
352 | * This is a hack, but it makes implementing 'next' easier by | |
353 | * ensuring that route_table_iter_next() will return NULL the first | |
354 | * time we call it. | |
355 | */ | |
356 | route_table_iter_init(&iter->iter, NULL); | |
357 | route_table_iter_cleanup(&iter->iter); | |
358 | } | |
359 | ||
360 | /* | |
361 | * zfpm_rnodes_iter_next | |
362 | */ | |
363 | static inline struct route_node *zfpm_rnodes_iter_next(zfpm_rnodes_iter_t *iter) | |
364 | { | |
365 | struct route_node *rn; | |
366 | struct route_table *table; | |
367 | ||
368 | while (1) { | |
369 | rn = route_table_iter_next(&iter->iter); | |
370 | if (rn) | |
371 | return rn; | |
372 | ||
373 | /* | |
374 | * We've made our way through this table, go to the next one. | |
375 | */ | |
376 | route_table_iter_cleanup(&iter->iter); | |
377 | ||
378 | table = rib_tables_iter_next(&iter->tables_iter); | |
379 | ||
380 | if (!table) | |
381 | return NULL; | |
382 | ||
383 | route_table_iter_init(&iter->iter, table); | |
384 | } | |
385 | ||
386 | return NULL; | |
387 | } | |
388 | ||
389 | /* | |
390 | * zfpm_rnodes_iter_pause | |
391 | */ | |
392 | static inline void zfpm_rnodes_iter_pause(zfpm_rnodes_iter_t *iter) | |
393 | { | |
394 | route_table_iter_pause(&iter->iter); | |
395 | } | |
396 | ||
397 | /* | |
398 | * zfpm_rnodes_iter_cleanup | |
399 | */ | |
400 | static inline void zfpm_rnodes_iter_cleanup(zfpm_rnodes_iter_t *iter) | |
401 | { | |
402 | route_table_iter_cleanup(&iter->iter); | |
403 | rib_tables_iter_cleanup(&iter->tables_iter); | |
404 | } | |
405 | ||
406 | /* | |
407 | * zfpm_stats_init | |
408 | * | |
409 | * Initialize a statistics block. | |
410 | */ | |
411 | static inline void zfpm_stats_init(zfpm_stats_t *stats) | |
412 | { | |
413 | memset(stats, 0, sizeof(*stats)); | |
414 | } | |
415 | ||
416 | /* | |
417 | * zfpm_stats_reset | |
418 | */ | |
419 | static inline void zfpm_stats_reset(zfpm_stats_t *stats) | |
420 | { | |
421 | zfpm_stats_init(stats); | |
422 | } | |
423 | ||
424 | /* | |
425 | * zfpm_stats_copy | |
426 | */ | |
427 | static inline void zfpm_stats_copy(const zfpm_stats_t *src, zfpm_stats_t *dest) | |
428 | { | |
429 | memcpy(dest, src, sizeof(*dest)); | |
430 | } | |
431 | ||
432 | /* | |
433 | * zfpm_stats_compose | |
434 | * | |
435 | * Total up the statistics in two stats structures ('s1 and 's2') and | |
436 | * return the result in the third argument, 'result'. Note that the | |
437 | * pointer 'result' may be the same as 's1' or 's2'. | |
438 | * | |
439 | * For simplicity, the implementation below assumes that the stats | |
440 | * structure is composed entirely of counters. This can easily be | |
441 | * changed when necessary. | |
442 | */ | |
443 | static void zfpm_stats_compose(const zfpm_stats_t *s1, const zfpm_stats_t *s2, | |
444 | zfpm_stats_t *result) | |
445 | { | |
446 | const unsigned long *p1, *p2; | |
447 | unsigned long *result_p; | |
448 | int i, num_counters; | |
449 | ||
450 | p1 = (const unsigned long *)s1; | |
451 | p2 = (const unsigned long *)s2; | |
452 | result_p = (unsigned long *)result; | |
453 | ||
454 | num_counters = (sizeof(zfpm_stats_t) / sizeof(unsigned long)); | |
455 | ||
456 | for (i = 0; i < num_counters; i++) { | |
457 | result_p[i] = p1[i] + p2[i]; | |
458 | } | |
459 | } | |
460 | ||
461 | /* | |
462 | * zfpm_read_on | |
463 | */ | |
464 | static inline void zfpm_read_on(void) | |
465 | { | |
466 | assert(!zfpm_g->t_read); | |
467 | assert(zfpm_g->sock >= 0); | |
468 | ||
469 | thread_add_read(zfpm_g->master, zfpm_read_cb, 0, zfpm_g->sock, | |
470 | &zfpm_g->t_read); | |
471 | } | |
472 | ||
473 | /* | |
474 | * zfpm_write_on | |
475 | */ | |
476 | static inline void zfpm_write_on(void) | |
477 | { | |
478 | assert(!zfpm_g->t_write); | |
479 | assert(zfpm_g->sock >= 0); | |
480 | ||
481 | thread_add_write(zfpm_g->master, zfpm_write_cb, 0, zfpm_g->sock, | |
482 | &zfpm_g->t_write); | |
483 | } | |
484 | ||
485 | /* | |
486 | * zfpm_read_off | |
487 | */ | |
488 | static inline void zfpm_read_off(void) | |
489 | { | |
490 | THREAD_READ_OFF(zfpm_g->t_read); | |
491 | } | |
492 | ||
493 | /* | |
494 | * zfpm_write_off | |
495 | */ | |
496 | static inline void zfpm_write_off(void) | |
497 | { | |
498 | THREAD_WRITE_OFF(zfpm_g->t_write); | |
499 | } | |
500 | ||
501 | static inline void zfpm_connect_off(void) | |
502 | { | |
503 | THREAD_TIMER_OFF(zfpm_g->t_connect); | |
504 | } | |
505 | ||
506 | /* | |
507 | * zfpm_conn_up_thread_cb | |
508 | * | |
509 | * Callback for actions to be taken when the connection to the FPM | |
510 | * comes up. | |
511 | */ | |
512 | static int zfpm_conn_up_thread_cb(struct thread *thread) | |
513 | { | |
514 | struct route_node *rnode; | |
515 | zfpm_rnodes_iter_t *iter; | |
516 | rib_dest_t *dest; | |
517 | ||
518 | zfpm_g->t_conn_up = NULL; | |
519 | ||
520 | iter = &zfpm_g->t_conn_up_state.iter; | |
521 | ||
522 | if (zfpm_g->state != ZFPM_STATE_ESTABLISHED) { | |
523 | zfpm_debug( | |
524 | "Connection not up anymore, conn_up thread aborting"); | |
525 | zfpm_g->stats.t_conn_up_aborts++; | |
526 | goto done; | |
527 | } | |
528 | ||
529 | /* Enqueue FPM updates for all the RMAC entries */ | |
530 | hash_iterate(zrouter.l3vni_table, zfpm_iterate_rmac_table, NULL); | |
531 | ||
532 | while ((rnode = zfpm_rnodes_iter_next(iter))) { | |
533 | dest = rib_dest_from_rnode(rnode); | |
534 | ||
535 | if (dest) { | |
536 | zfpm_g->stats.t_conn_up_dests_processed++; | |
537 | zfpm_trigger_update(rnode, NULL); | |
538 | } | |
539 | ||
540 | /* | |
541 | * Yield if need be. | |
542 | */ | |
543 | if (!zfpm_thread_should_yield(thread)) | |
544 | continue; | |
545 | ||
546 | zfpm_g->stats.t_conn_up_yields++; | |
547 | zfpm_rnodes_iter_pause(iter); | |
548 | zfpm_g->t_conn_up = NULL; | |
549 | thread_add_timer_msec(zfpm_g->master, zfpm_conn_up_thread_cb, | |
550 | NULL, 0, &zfpm_g->t_conn_up); | |
551 | return 0; | |
552 | } | |
553 | ||
554 | zfpm_g->stats.t_conn_up_finishes++; | |
555 | ||
556 | done: | |
557 | zfpm_rnodes_iter_cleanup(iter); | |
558 | return 0; | |
559 | } | |
560 | ||
561 | /* | |
562 | * zfpm_connection_up | |
563 | * | |
564 | * Called when the connection to the FPM comes up. | |
565 | */ | |
566 | static void zfpm_connection_up(const char *detail) | |
567 | { | |
568 | assert(zfpm_g->sock >= 0); | |
569 | zfpm_read_on(); | |
570 | zfpm_write_on(); | |
571 | zfpm_set_state(ZFPM_STATE_ESTABLISHED, detail); | |
572 | ||
573 | /* | |
574 | * Start thread to push existing routes to the FPM. | |
575 | */ | |
576 | assert(!zfpm_g->t_conn_up); | |
577 | ||
578 | zfpm_rnodes_iter_init(&zfpm_g->t_conn_up_state.iter); | |
579 | ||
580 | zfpm_debug("Starting conn_up thread"); | |
581 | zfpm_g->t_conn_up = NULL; | |
582 | thread_add_timer_msec(zfpm_g->master, zfpm_conn_up_thread_cb, NULL, 0, | |
583 | &zfpm_g->t_conn_up); | |
584 | zfpm_g->stats.t_conn_up_starts++; | |
585 | } | |
586 | ||
587 | /* | |
588 | * zfpm_connect_check | |
589 | * | |
590 | * Check if an asynchronous connect() to the FPM is complete. | |
591 | */ | |
592 | static void zfpm_connect_check(void) | |
593 | { | |
594 | int status; | |
595 | socklen_t slen; | |
596 | int ret; | |
597 | ||
598 | zfpm_read_off(); | |
599 | zfpm_write_off(); | |
600 | ||
601 | slen = sizeof(status); | |
602 | ret = getsockopt(zfpm_g->sock, SOL_SOCKET, SO_ERROR, (void *)&status, | |
603 | &slen); | |
604 | ||
605 | if (ret >= 0 && status == 0) { | |
606 | zfpm_connection_up("async connect complete"); | |
607 | return; | |
608 | } | |
609 | ||
610 | /* | |
611 | * getsockopt() failed or indicated an error on the socket. | |
612 | */ | |
613 | close(zfpm_g->sock); | |
614 | zfpm_g->sock = -1; | |
615 | ||
616 | zfpm_start_connect_timer("getsockopt() after async connect failed"); | |
617 | return; | |
618 | } | |
619 | ||
620 | /* | |
621 | * zfpm_conn_down_thread_cb | |
622 | * | |
623 | * Callback that is invoked to clean up state after the TCP connection | |
624 | * to the FPM goes down. | |
625 | */ | |
626 | static int zfpm_conn_down_thread_cb(struct thread *thread) | |
627 | { | |
628 | struct route_node *rnode; | |
629 | zfpm_rnodes_iter_t *iter; | |
630 | rib_dest_t *dest; | |
631 | struct fpm_mac_info_t *mac = NULL; | |
632 | ||
633 | assert(zfpm_g->state == ZFPM_STATE_IDLE); | |
634 | ||
635 | /* | |
636 | * Delink and free all fpm_mac_info_t nodes | |
637 | * in the mac_q and fpm_mac_info_hash | |
638 | */ | |
639 | while ((mac = TAILQ_FIRST(&zfpm_g->mac_q)) != NULL) | |
640 | zfpm_mac_info_del(mac); | |
641 | ||
642 | zfpm_g->t_conn_down = NULL; | |
643 | ||
644 | iter = &zfpm_g->t_conn_down_state.iter; | |
645 | ||
646 | while ((rnode = zfpm_rnodes_iter_next(iter))) { | |
647 | dest = rib_dest_from_rnode(rnode); | |
648 | ||
649 | if (dest) { | |
650 | if (CHECK_FLAG(dest->flags, RIB_DEST_UPDATE_FPM)) { | |
651 | TAILQ_REMOVE(&zfpm_g->dest_q, dest, | |
652 | fpm_q_entries); | |
653 | } | |
654 | ||
655 | UNSET_FLAG(dest->flags, RIB_DEST_UPDATE_FPM); | |
656 | UNSET_FLAG(dest->flags, RIB_DEST_SENT_TO_FPM); | |
657 | ||
658 | zfpm_g->stats.t_conn_down_dests_processed++; | |
659 | ||
660 | /* | |
661 | * Check if the dest should be deleted. | |
662 | */ | |
663 | rib_gc_dest(rnode); | |
664 | } | |
665 | ||
666 | /* | |
667 | * Yield if need be. | |
668 | */ | |
669 | if (!zfpm_thread_should_yield(thread)) | |
670 | continue; | |
671 | ||
672 | zfpm_g->stats.t_conn_down_yields++; | |
673 | zfpm_rnodes_iter_pause(iter); | |
674 | zfpm_g->t_conn_down = NULL; | |
675 | thread_add_timer_msec(zfpm_g->master, zfpm_conn_down_thread_cb, | |
676 | NULL, 0, &zfpm_g->t_conn_down); | |
677 | return 0; | |
678 | } | |
679 | ||
680 | zfpm_g->stats.t_conn_down_finishes++; | |
681 | zfpm_rnodes_iter_cleanup(iter); | |
682 | ||
683 | /* | |
684 | * Start the process of connecting to the FPM again. | |
685 | */ | |
686 | zfpm_start_connect_timer("cleanup complete"); | |
687 | return 0; | |
688 | } | |
689 | ||
690 | /* | |
691 | * zfpm_connection_down | |
692 | * | |
693 | * Called when the connection to the FPM has gone down. | |
694 | */ | |
695 | static void zfpm_connection_down(const char *detail) | |
696 | { | |
697 | if (!detail) | |
698 | detail = "unknown"; | |
699 | ||
700 | assert(zfpm_g->state == ZFPM_STATE_ESTABLISHED); | |
701 | ||
702 | zlog_info("connection to the FPM has gone down: %s", detail); | |
703 | ||
704 | zfpm_read_off(); | |
705 | zfpm_write_off(); | |
706 | ||
707 | stream_reset(zfpm_g->ibuf); | |
708 | stream_reset(zfpm_g->obuf); | |
709 | ||
710 | if (zfpm_g->sock >= 0) { | |
711 | close(zfpm_g->sock); | |
712 | zfpm_g->sock = -1; | |
713 | } | |
714 | ||
715 | /* | |
716 | * Start thread to clean up state after the connection goes down. | |
717 | */ | |
718 | assert(!zfpm_g->t_conn_down); | |
719 | zfpm_rnodes_iter_init(&zfpm_g->t_conn_down_state.iter); | |
720 | zfpm_g->t_conn_down = NULL; | |
721 | thread_add_timer_msec(zfpm_g->master, zfpm_conn_down_thread_cb, NULL, 0, | |
722 | &zfpm_g->t_conn_down); | |
723 | zfpm_g->stats.t_conn_down_starts++; | |
724 | ||
725 | zfpm_set_state(ZFPM_STATE_IDLE, detail); | |
726 | } | |
727 | ||
728 | /* | |
729 | * zfpm_read_cb | |
730 | */ | |
731 | static int zfpm_read_cb(struct thread *thread) | |
732 | { | |
733 | size_t already; | |
734 | struct stream *ibuf; | |
735 | uint16_t msg_len; | |
736 | fpm_msg_hdr_t *hdr; | |
737 | ||
738 | zfpm_g->stats.read_cb_calls++; | |
739 | ||
740 | /* | |
741 | * Check if async connect is now done. | |
742 | */ | |
743 | if (zfpm_g->state == ZFPM_STATE_CONNECTING) { | |
744 | zfpm_connect_check(); | |
745 | return 0; | |
746 | } | |
747 | ||
748 | assert(zfpm_g->state == ZFPM_STATE_ESTABLISHED); | |
749 | assert(zfpm_g->sock >= 0); | |
750 | ||
751 | ibuf = zfpm_g->ibuf; | |
752 | ||
753 | already = stream_get_endp(ibuf); | |
754 | if (already < FPM_MSG_HDR_LEN) { | |
755 | ssize_t nbyte; | |
756 | ||
757 | nbyte = stream_read_try(ibuf, zfpm_g->sock, | |
758 | FPM_MSG_HDR_LEN - already); | |
759 | if (nbyte == 0 || nbyte == -1) { | |
760 | if (nbyte == -1) { | |
761 | char buffer[1024]; | |
762 | ||
763 | sprintf(buffer, "closed socket in read(%d): %s", | |
764 | errno, safe_strerror(errno)); | |
765 | zfpm_connection_down(buffer); | |
766 | } else | |
767 | zfpm_connection_down("closed socket in read"); | |
768 | return 0; | |
769 | } | |
770 | ||
771 | if (nbyte != (ssize_t)(FPM_MSG_HDR_LEN - already)) | |
772 | goto done; | |
773 | ||
774 | already = FPM_MSG_HDR_LEN; | |
775 | } | |
776 | ||
777 | stream_set_getp(ibuf, 0); | |
778 | ||
779 | hdr = (fpm_msg_hdr_t *)stream_pnt(ibuf); | |
780 | ||
781 | if (!fpm_msg_hdr_ok(hdr)) { | |
782 | zfpm_connection_down("invalid message header"); | |
783 | return 0; | |
784 | } | |
785 | ||
786 | msg_len = fpm_msg_len(hdr); | |
787 | ||
788 | /* | |
789 | * Read out the rest of the packet. | |
790 | */ | |
791 | if (already < msg_len) { | |
792 | ssize_t nbyte; | |
793 | ||
794 | nbyte = stream_read_try(ibuf, zfpm_g->sock, msg_len - already); | |
795 | ||
796 | if (nbyte == 0 || nbyte == -1) { | |
797 | if (nbyte == -1) { | |
798 | char buffer[1024]; | |
799 | ||
800 | sprintf(buffer, "failed to read message(%d) %s", | |
801 | errno, safe_strerror(errno)); | |
802 | zfpm_connection_down(buffer); | |
803 | } else | |
804 | zfpm_connection_down("failed to read message"); | |
805 | return 0; | |
806 | } | |
807 | ||
808 | if (nbyte != (ssize_t)(msg_len - already)) | |
809 | goto done; | |
810 | } | |
811 | ||
812 | /* | |
813 | * Just throw it away for now. | |
814 | */ | |
815 | stream_reset(ibuf); | |
816 | ||
817 | done: | |
818 | zfpm_read_on(); | |
819 | return 0; | |
820 | } | |
821 | ||
822 | static bool zfpm_updates_pending(void) | |
823 | { | |
824 | if (!(TAILQ_EMPTY(&zfpm_g->dest_q)) || !(TAILQ_EMPTY(&zfpm_g->mac_q))) | |
825 | return true; | |
826 | ||
827 | return false; | |
828 | } | |
829 | ||
830 | /* | |
831 | * zfpm_writes_pending | |
832 | * | |
833 | * Returns true if we may have something to write to the FPM. | |
834 | */ | |
835 | static int zfpm_writes_pending(void) | |
836 | { | |
837 | ||
838 | /* | |
839 | * Check if there is any data in the outbound buffer that has not | |
840 | * been written to the socket yet. | |
841 | */ | |
842 | if (stream_get_endp(zfpm_g->obuf) - stream_get_getp(zfpm_g->obuf)) | |
843 | return 1; | |
844 | ||
845 | /* | |
846 | * Check if there are any updates scheduled on the outbound queues. | |
847 | */ | |
848 | if (zfpm_updates_pending()) | |
849 | return 1; | |
850 | ||
851 | return 0; | |
852 | } | |
853 | ||
854 | /* | |
855 | * zfpm_encode_route | |
856 | * | |
857 | * Encode a message to the FPM with information about the given route. | |
858 | * | |
859 | * Returns the number of bytes written to the buffer. 0 or a negative | |
860 | * value indicates an error. | |
861 | */ | |
862 | static inline int zfpm_encode_route(rib_dest_t *dest, struct route_entry *re, | |
863 | char *in_buf, size_t in_buf_len, | |
864 | fpm_msg_type_e *msg_type) | |
865 | { | |
866 | size_t len; | |
867 | #ifdef HAVE_NETLINK | |
868 | int cmd; | |
869 | #endif | |
870 | len = 0; | |
871 | ||
872 | *msg_type = FPM_MSG_TYPE_NONE; | |
873 | ||
874 | switch (zfpm_g->message_format) { | |
875 | ||
876 | case ZFPM_MSG_FORMAT_PROTOBUF: | |
877 | #ifdef HAVE_PROTOBUF | |
878 | len = zfpm_protobuf_encode_route(dest, re, (uint8_t *)in_buf, | |
879 | in_buf_len); | |
880 | *msg_type = FPM_MSG_TYPE_PROTOBUF; | |
881 | #endif | |
882 | break; | |
883 | ||
884 | case ZFPM_MSG_FORMAT_NETLINK: | |
885 | #ifdef HAVE_NETLINK | |
886 | *msg_type = FPM_MSG_TYPE_NETLINK; | |
887 | cmd = re ? RTM_NEWROUTE : RTM_DELROUTE; | |
888 | len = zfpm_netlink_encode_route(cmd, dest, re, in_buf, | |
889 | in_buf_len); | |
890 | assert(fpm_msg_align(len) == len); | |
891 | *msg_type = FPM_MSG_TYPE_NETLINK; | |
892 | #endif /* HAVE_NETLINK */ | |
893 | break; | |
894 | ||
895 | default: | |
896 | break; | |
897 | } | |
898 | ||
899 | return len; | |
900 | } | |
901 | ||
902 | /* | |
903 | * zfpm_route_for_update | |
904 | * | |
905 | * Returns the re that is to be sent to the FPM for a given dest. | |
906 | */ | |
907 | struct route_entry *zfpm_route_for_update(rib_dest_t *dest) | |
908 | { | |
909 | return dest->selected_fib; | |
910 | } | |
911 | ||
912 | /* | |
913 | * Define an enum for return codes for queue processing functions | |
914 | * | |
915 | * FPM_WRITE_STOP: This return code indicates that the write buffer is full. | |
916 | * Stop processing all the queues and empty the buffer by writing its content | |
917 | * to the socket. | |
918 | * | |
919 | * FPM_GOTO_NEXT_Q: This return code indicates that either this queue is | |
920 | * empty or we have processed enough updates from this queue. | |
921 | * So, move on to the next queue. | |
922 | */ | |
923 | enum { | |
924 | FPM_WRITE_STOP = 0, | |
925 | FPM_GOTO_NEXT_Q = 1 | |
926 | }; | |
927 | ||
928 | #define FPM_QUEUE_PROCESS_LIMIT 10000 | |
929 | ||
930 | /* | |
931 | * zfpm_build_route_updates | |
932 | * | |
933 | * Process the dest_q queue and write FPM messages to the outbound buffer. | |
934 | */ | |
935 | static int zfpm_build_route_updates(void) | |
936 | { | |
937 | struct stream *s; | |
938 | rib_dest_t *dest; | |
939 | unsigned char *buf, *data, *buf_end; | |
940 | size_t msg_len; | |
941 | size_t data_len; | |
942 | fpm_msg_hdr_t *hdr; | |
943 | struct route_entry *re; | |
944 | int is_add, write_msg; | |
945 | fpm_msg_type_e msg_type; | |
946 | uint16_t q_limit; | |
947 | ||
948 | if (TAILQ_EMPTY(&zfpm_g->dest_q)) | |
949 | return FPM_GOTO_NEXT_Q; | |
950 | ||
951 | s = zfpm_g->obuf; | |
952 | q_limit = FPM_QUEUE_PROCESS_LIMIT; | |
953 | ||
954 | do { | |
955 | /* | |
956 | * Make sure there is enough space to write another message. | |
957 | */ | |
958 | if (STREAM_WRITEABLE(s) < FPM_MAX_MSG_LEN) | |
959 | return FPM_WRITE_STOP; | |
960 | ||
961 | buf = STREAM_DATA(s) + stream_get_endp(s); | |
962 | buf_end = buf + STREAM_WRITEABLE(s); | |
963 | ||
964 | dest = TAILQ_FIRST(&zfpm_g->dest_q); | |
965 | if (!dest) | |
966 | return FPM_GOTO_NEXT_Q; | |
967 | ||
968 | assert(CHECK_FLAG(dest->flags, RIB_DEST_UPDATE_FPM)); | |
969 | ||
970 | hdr = (fpm_msg_hdr_t *)buf; | |
971 | hdr->version = FPM_PROTO_VERSION; | |
972 | ||
973 | data = fpm_msg_data(hdr); | |
974 | ||
975 | re = zfpm_route_for_update(dest); | |
976 | is_add = re ? 1 : 0; | |
977 | ||
978 | write_msg = 1; | |
979 | ||
980 | /* | |
981 | * If this is a route deletion, and we have not sent the route | |
982 | * to | |
983 | * the FPM previously, skip it. | |
984 | */ | |
985 | if (!is_add && !CHECK_FLAG(dest->flags, RIB_DEST_SENT_TO_FPM)) { | |
986 | write_msg = 0; | |
987 | zfpm_g->stats.nop_deletes_skipped++; | |
988 | } | |
989 | ||
990 | if (write_msg) { | |
991 | data_len = zfpm_encode_route(dest, re, (char *)data, | |
992 | buf_end - data, &msg_type); | |
993 | ||
994 | assert(data_len); | |
995 | if (data_len) { | |
996 | hdr->msg_type = msg_type; | |
997 | msg_len = fpm_data_len_to_msg_len(data_len); | |
998 | hdr->msg_len = htons(msg_len); | |
999 | stream_forward_endp(s, msg_len); | |
1000 | ||
1001 | if (is_add) | |
1002 | zfpm_g->stats.route_adds++; | |
1003 | else | |
1004 | zfpm_g->stats.route_dels++; | |
1005 | } | |
1006 | } | |
1007 | ||
1008 | /* | |
1009 | * Remove the dest from the queue, and reset the flag. | |
1010 | */ | |
1011 | UNSET_FLAG(dest->flags, RIB_DEST_UPDATE_FPM); | |
1012 | TAILQ_REMOVE(&zfpm_g->dest_q, dest, fpm_q_entries); | |
1013 | ||
1014 | if (is_add) { | |
1015 | SET_FLAG(dest->flags, RIB_DEST_SENT_TO_FPM); | |
1016 | } else { | |
1017 | UNSET_FLAG(dest->flags, RIB_DEST_SENT_TO_FPM); | |
1018 | } | |
1019 | ||
1020 | /* | |
1021 | * Delete the destination if necessary. | |
1022 | */ | |
1023 | if (rib_gc_dest(dest->rnode)) | |
1024 | zfpm_g->stats.dests_del_after_update++; | |
1025 | ||
1026 | q_limit--; | |
1027 | if (q_limit == 0) { | |
1028 | /* | |
1029 | * We have processed enough updates in this queue. | |
1030 | * Now yield for other queues. | |
1031 | */ | |
1032 | return FPM_GOTO_NEXT_Q; | |
1033 | } | |
1034 | } while (true); | |
1035 | } | |
1036 | ||
1037 | /* | |
1038 | * zfpm_encode_mac | |
1039 | * | |
1040 | * Encode a message to FPM with information about the given MAC. | |
1041 | * | |
1042 | * Returns the number of bytes written to the buffer. | |
1043 | */ | |
1044 | static inline int zfpm_encode_mac(struct fpm_mac_info_t *mac, char *in_buf, | |
1045 | size_t in_buf_len, fpm_msg_type_e *msg_type) | |
1046 | { | |
1047 | size_t len = 0; | |
1048 | ||
1049 | *msg_type = FPM_MSG_TYPE_NONE; | |
1050 | ||
1051 | switch (zfpm_g->message_format) { | |
1052 | ||
1053 | case ZFPM_MSG_FORMAT_NONE: | |
1054 | break; | |
1055 | case ZFPM_MSG_FORMAT_NETLINK: | |
1056 | #ifdef HAVE_NETLINK | |
1057 | len = zfpm_netlink_encode_mac(mac, in_buf, in_buf_len); | |
1058 | assert(fpm_msg_align(len) == len); | |
1059 | *msg_type = FPM_MSG_TYPE_NETLINK; | |
1060 | #endif /* HAVE_NETLINK */ | |
1061 | break; | |
1062 | case ZFPM_MSG_FORMAT_PROTOBUF: | |
1063 | break; | |
1064 | } | |
1065 | return len; | |
1066 | } | |
1067 | ||
1068 | static int zfpm_build_mac_updates(void) | |
1069 | { | |
1070 | struct stream *s; | |
1071 | struct fpm_mac_info_t *mac; | |
1072 | unsigned char *buf, *data, *buf_end; | |
1073 | fpm_msg_hdr_t *hdr; | |
1074 | size_t data_len, msg_len; | |
1075 | fpm_msg_type_e msg_type; | |
1076 | uint16_t q_limit; | |
1077 | ||
1078 | if (TAILQ_EMPTY(&zfpm_g->mac_q)) | |
1079 | return FPM_GOTO_NEXT_Q; | |
1080 | ||
1081 | s = zfpm_g->obuf; | |
1082 | q_limit = FPM_QUEUE_PROCESS_LIMIT; | |
1083 | ||
1084 | do { | |
1085 | /* Make sure there is enough space to write another message. */ | |
1086 | if (STREAM_WRITEABLE(s) < FPM_MAX_MAC_MSG_LEN) | |
1087 | return FPM_WRITE_STOP; | |
1088 | ||
1089 | buf = STREAM_DATA(s) + stream_get_endp(s); | |
1090 | buf_end = buf + STREAM_WRITEABLE(s); | |
1091 | ||
1092 | mac = TAILQ_FIRST(&zfpm_g->mac_q); | |
1093 | if (!mac) | |
1094 | return FPM_GOTO_NEXT_Q; | |
1095 | ||
1096 | /* Check for no-op */ | |
1097 | if (!CHECK_FLAG(mac->fpm_flags, ZEBRA_MAC_UPDATE_FPM)) { | |
1098 | zfpm_g->stats.nop_deletes_skipped++; | |
1099 | zfpm_mac_info_del(mac); | |
1100 | continue; | |
1101 | } | |
1102 | ||
1103 | hdr = (fpm_msg_hdr_t *)buf; | |
1104 | hdr->version = FPM_PROTO_VERSION; | |
1105 | ||
1106 | data = fpm_msg_data(hdr); | |
1107 | data_len = zfpm_encode_mac(mac, (char *)data, buf_end - data, | |
1108 | &msg_type); | |
1109 | assert(data_len); | |
1110 | ||
1111 | hdr->msg_type = msg_type; | |
1112 | msg_len = fpm_data_len_to_msg_len(data_len); | |
1113 | hdr->msg_len = htons(msg_len); | |
1114 | stream_forward_endp(s, msg_len); | |
1115 | ||
1116 | /* Remove the MAC from the queue, and delete it. */ | |
1117 | zfpm_mac_info_del(mac); | |
1118 | ||
1119 | q_limit--; | |
1120 | if (q_limit == 0) { | |
1121 | /* | |
1122 | * We have processed enough updates in this queue. | |
1123 | * Now yield for other queues. | |
1124 | */ | |
1125 | return FPM_GOTO_NEXT_Q; | |
1126 | } | |
1127 | } while (1); | |
1128 | } | |
1129 | ||
1130 | /* | |
1131 | * zfpm_build_updates | |
1132 | * | |
1133 | * Process the outgoing queues and write messages to the outbound | |
1134 | * buffer. | |
1135 | */ | |
1136 | static void zfpm_build_updates(void) | |
1137 | { | |
1138 | struct stream *s; | |
1139 | ||
1140 | s = zfpm_g->obuf; | |
1141 | assert(stream_empty(s)); | |
1142 | ||
1143 | do { | |
1144 | /* | |
1145 | * Stop processing the queues if zfpm_g->obuf is full | |
1146 | * or we do not have more updates to process | |
1147 | */ | |
1148 | if (zfpm_build_mac_updates() == FPM_WRITE_STOP) | |
1149 | break; | |
1150 | if (zfpm_build_route_updates() == FPM_WRITE_STOP) | |
1151 | break; | |
1152 | } while (zfpm_updates_pending()); | |
1153 | } | |
1154 | ||
1155 | /* | |
1156 | * zfpm_write_cb | |
1157 | */ | |
1158 | static int zfpm_write_cb(struct thread *thread) | |
1159 | { | |
1160 | struct stream *s; | |
1161 | int num_writes; | |
1162 | ||
1163 | zfpm_g->stats.write_cb_calls++; | |
1164 | ||
1165 | /* | |
1166 | * Check if async connect is now done. | |
1167 | */ | |
1168 | if (zfpm_g->state == ZFPM_STATE_CONNECTING) { | |
1169 | zfpm_connect_check(); | |
1170 | return 0; | |
1171 | } | |
1172 | ||
1173 | assert(zfpm_g->state == ZFPM_STATE_ESTABLISHED); | |
1174 | assert(zfpm_g->sock >= 0); | |
1175 | ||
1176 | num_writes = 0; | |
1177 | ||
1178 | do { | |
1179 | int bytes_to_write, bytes_written; | |
1180 | ||
1181 | s = zfpm_g->obuf; | |
1182 | ||
1183 | /* | |
1184 | * If the stream is empty, try fill it up with data. | |
1185 | */ | |
1186 | if (stream_empty(s)) { | |
1187 | zfpm_build_updates(); | |
1188 | } | |
1189 | ||
1190 | bytes_to_write = stream_get_endp(s) - stream_get_getp(s); | |
1191 | if (!bytes_to_write) | |
1192 | break; | |
1193 | ||
1194 | bytes_written = | |
1195 | write(zfpm_g->sock, stream_pnt(s), bytes_to_write); | |
1196 | zfpm_g->stats.write_calls++; | |
1197 | num_writes++; | |
1198 | ||
1199 | if (bytes_written < 0) { | |
1200 | if (ERRNO_IO_RETRY(errno)) | |
1201 | break; | |
1202 | ||
1203 | zfpm_connection_down("failed to write to socket"); | |
1204 | return 0; | |
1205 | } | |
1206 | ||
1207 | if (bytes_written != bytes_to_write) { | |
1208 | ||
1209 | /* | |
1210 | * Partial write. | |
1211 | */ | |
1212 | stream_forward_getp(s, bytes_written); | |
1213 | zfpm_g->stats.partial_writes++; | |
1214 | break; | |
1215 | } | |
1216 | ||
1217 | /* | |
1218 | * We've written out the entire contents of the stream. | |
1219 | */ | |
1220 | stream_reset(s); | |
1221 | ||
1222 | if (num_writes >= ZFPM_MAX_WRITES_PER_RUN) { | |
1223 | zfpm_g->stats.max_writes_hit++; | |
1224 | break; | |
1225 | } | |
1226 | ||
1227 | if (zfpm_thread_should_yield(thread)) { | |
1228 | zfpm_g->stats.t_write_yields++; | |
1229 | break; | |
1230 | } | |
1231 | } while (1); | |
1232 | ||
1233 | if (zfpm_writes_pending()) | |
1234 | zfpm_write_on(); | |
1235 | ||
1236 | return 0; | |
1237 | } | |
1238 | ||
1239 | /* | |
1240 | * zfpm_connect_cb | |
1241 | */ | |
1242 | static int zfpm_connect_cb(struct thread *t) | |
1243 | { | |
1244 | int sock, ret; | |
1245 | struct sockaddr_in serv; | |
1246 | ||
1247 | assert(zfpm_g->state == ZFPM_STATE_ACTIVE); | |
1248 | ||
1249 | sock = socket(AF_INET, SOCK_STREAM, 0); | |
1250 | if (sock < 0) { | |
1251 | zlog_err("Failed to create socket for connect(): %s", | |
1252 | strerror(errno)); | |
1253 | zfpm_g->stats.connect_no_sock++; | |
1254 | return 0; | |
1255 | } | |
1256 | ||
1257 | set_nonblocking(sock); | |
1258 | ||
1259 | /* Make server socket. */ | |
1260 | memset(&serv, 0, sizeof(serv)); | |
1261 | serv.sin_family = AF_INET; | |
1262 | serv.sin_port = htons(zfpm_g->fpm_port); | |
1263 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN | |
1264 | serv.sin_len = sizeof(struct sockaddr_in); | |
1265 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ | |
1266 | if (!zfpm_g->fpm_server) | |
1267 | serv.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
1268 | else | |
1269 | serv.sin_addr.s_addr = (zfpm_g->fpm_server); | |
1270 | ||
1271 | /* | |
1272 | * Connect to the FPM. | |
1273 | */ | |
1274 | zfpm_g->connect_calls++; | |
1275 | zfpm_g->stats.connect_calls++; | |
1276 | zfpm_g->last_connect_call_time = monotime(NULL); | |
1277 | ||
1278 | ret = connect(sock, (struct sockaddr *)&serv, sizeof(serv)); | |
1279 | if (ret >= 0) { | |
1280 | zfpm_g->sock = sock; | |
1281 | zfpm_connection_up("connect succeeded"); | |
1282 | return 1; | |
1283 | } | |
1284 | ||
1285 | if (errno == EINPROGRESS) { | |
1286 | zfpm_g->sock = sock; | |
1287 | zfpm_read_on(); | |
1288 | zfpm_write_on(); | |
1289 | zfpm_set_state(ZFPM_STATE_CONNECTING, | |
1290 | "async connect in progress"); | |
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | zlog_info("can't connect to FPM %d: %s", sock, safe_strerror(errno)); | |
1295 | close(sock); | |
1296 | ||
1297 | /* | |
1298 | * Restart timer for retrying connection. | |
1299 | */ | |
1300 | zfpm_start_connect_timer("connect() failed"); | |
1301 | return 0; | |
1302 | } | |
1303 | ||
1304 | /* | |
1305 | * zfpm_set_state | |
1306 | * | |
1307 | * Move state machine into the given state. | |
1308 | */ | |
1309 | static void zfpm_set_state(zfpm_state_t state, const char *reason) | |
1310 | { | |
1311 | zfpm_state_t cur_state = zfpm_g->state; | |
1312 | ||
1313 | if (!reason) | |
1314 | reason = "Unknown"; | |
1315 | ||
1316 | if (state == cur_state) | |
1317 | return; | |
1318 | ||
1319 | zfpm_debug("beginning state transition %s -> %s. Reason: %s", | |
1320 | zfpm_state_to_str(cur_state), zfpm_state_to_str(state), | |
1321 | reason); | |
1322 | ||
1323 | switch (state) { | |
1324 | ||
1325 | case ZFPM_STATE_IDLE: | |
1326 | assert(cur_state == ZFPM_STATE_ESTABLISHED); | |
1327 | break; | |
1328 | ||
1329 | case ZFPM_STATE_ACTIVE: | |
1330 | assert(cur_state == ZFPM_STATE_IDLE | |
1331 | || cur_state == ZFPM_STATE_CONNECTING); | |
1332 | assert(zfpm_g->t_connect); | |
1333 | break; | |
1334 | ||
1335 | case ZFPM_STATE_CONNECTING: | |
1336 | assert(zfpm_g->sock); | |
1337 | assert(cur_state == ZFPM_STATE_ACTIVE); | |
1338 | assert(zfpm_g->t_read); | |
1339 | assert(zfpm_g->t_write); | |
1340 | break; | |
1341 | ||
1342 | case ZFPM_STATE_ESTABLISHED: | |
1343 | assert(cur_state == ZFPM_STATE_ACTIVE | |
1344 | || cur_state == ZFPM_STATE_CONNECTING); | |
1345 | assert(zfpm_g->sock); | |
1346 | assert(zfpm_g->t_read); | |
1347 | assert(zfpm_g->t_write); | |
1348 | break; | |
1349 | } | |
1350 | ||
1351 | zfpm_g->state = state; | |
1352 | } | |
1353 | ||
1354 | /* | |
1355 | * zfpm_calc_connect_delay | |
1356 | * | |
1357 | * Returns the number of seconds after which we should attempt to | |
1358 | * reconnect to the FPM. | |
1359 | */ | |
1360 | static long zfpm_calc_connect_delay(void) | |
1361 | { | |
1362 | time_t elapsed; | |
1363 | ||
1364 | /* | |
1365 | * Return 0 if this is our first attempt to connect. | |
1366 | */ | |
1367 | if (zfpm_g->connect_calls == 0) { | |
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | elapsed = zfpm_get_elapsed_time(zfpm_g->last_connect_call_time); | |
1372 | ||
1373 | if (elapsed > ZFPM_CONNECT_RETRY_IVL) { | |
1374 | return 0; | |
1375 | } | |
1376 | ||
1377 | return ZFPM_CONNECT_RETRY_IVL - elapsed; | |
1378 | } | |
1379 | ||
1380 | /* | |
1381 | * zfpm_start_connect_timer | |
1382 | */ | |
1383 | static void zfpm_start_connect_timer(const char *reason) | |
1384 | { | |
1385 | long delay_secs; | |
1386 | ||
1387 | assert(!zfpm_g->t_connect); | |
1388 | assert(zfpm_g->sock < 0); | |
1389 | ||
1390 | assert(zfpm_g->state == ZFPM_STATE_IDLE | |
1391 | || zfpm_g->state == ZFPM_STATE_ACTIVE | |
1392 | || zfpm_g->state == ZFPM_STATE_CONNECTING); | |
1393 | ||
1394 | delay_secs = zfpm_calc_connect_delay(); | |
1395 | zfpm_debug("scheduling connect in %ld seconds", delay_secs); | |
1396 | ||
1397 | thread_add_timer(zfpm_g->master, zfpm_connect_cb, 0, delay_secs, | |
1398 | &zfpm_g->t_connect); | |
1399 | zfpm_set_state(ZFPM_STATE_ACTIVE, reason); | |
1400 | } | |
1401 | ||
1402 | /* | |
1403 | * zfpm_is_enabled | |
1404 | * | |
1405 | * Returns true if the zebra FPM module has been enabled. | |
1406 | */ | |
1407 | static inline int zfpm_is_enabled(void) | |
1408 | { | |
1409 | return zfpm_g->enabled; | |
1410 | } | |
1411 | ||
1412 | /* | |
1413 | * zfpm_conn_is_up | |
1414 | * | |
1415 | * Returns true if the connection to the FPM is up. | |
1416 | */ | |
1417 | static inline int zfpm_conn_is_up(void) | |
1418 | { | |
1419 | if (zfpm_g->state != ZFPM_STATE_ESTABLISHED) | |
1420 | return 0; | |
1421 | ||
1422 | assert(zfpm_g->sock >= 0); | |
1423 | ||
1424 | return 1; | |
1425 | } | |
1426 | ||
1427 | /* | |
1428 | * zfpm_trigger_update | |
1429 | * | |
1430 | * The zebra code invokes this function to indicate that we should | |
1431 | * send an update to the FPM about the given route_node. | |
1432 | */ | |
1433 | static int zfpm_trigger_update(struct route_node *rn, const char *reason) | |
1434 | { | |
1435 | rib_dest_t *dest; | |
1436 | char buf[PREFIX_STRLEN]; | |
1437 | ||
1438 | /* | |
1439 | * Ignore if the connection is down. We will update the FPM about | |
1440 | * all destinations once the connection comes up. | |
1441 | */ | |
1442 | if (!zfpm_conn_is_up()) | |
1443 | return 0; | |
1444 | ||
1445 | dest = rib_dest_from_rnode(rn); | |
1446 | ||
1447 | if (CHECK_FLAG(dest->flags, RIB_DEST_UPDATE_FPM)) { | |
1448 | zfpm_g->stats.redundant_triggers++; | |
1449 | return 0; | |
1450 | } | |
1451 | ||
1452 | if (reason) { | |
1453 | zfpm_debug("%s triggering update to FPM - Reason: %s", | |
1454 | prefix2str(&rn->p, buf, sizeof(buf)), reason); | |
1455 | } | |
1456 | ||
1457 | SET_FLAG(dest->flags, RIB_DEST_UPDATE_FPM); | |
1458 | TAILQ_INSERT_TAIL(&zfpm_g->dest_q, dest, fpm_q_entries); | |
1459 | zfpm_g->stats.updates_triggered++; | |
1460 | ||
1461 | /* | |
1462 | * Make sure that writes are enabled. | |
1463 | */ | |
1464 | if (zfpm_g->t_write) | |
1465 | return 0; | |
1466 | ||
1467 | zfpm_write_on(); | |
1468 | return 0; | |
1469 | } | |
1470 | ||
1471 | /* | |
1472 | * Generate Key for FPM MAC info hash entry | |
1473 | * Key is generated using MAC address and VNI id which should be sufficient | |
1474 | * to provide uniqueness | |
1475 | */ | |
1476 | static unsigned int zfpm_mac_info_hash_keymake(const void *p) | |
1477 | { | |
1478 | struct fpm_mac_info_t *fpm_mac = (struct fpm_mac_info_t *)p; | |
1479 | uint32_t mac_key; | |
1480 | ||
1481 | mac_key = jhash(fpm_mac->macaddr.octet, ETH_ALEN, 0xa5a5a55a); | |
1482 | ||
1483 | return jhash_2words(mac_key, fpm_mac->vni, 0); | |
1484 | } | |
1485 | ||
1486 | /* | |
1487 | * Compare function for FPM MAC info hash lookup | |
1488 | */ | |
1489 | static bool zfpm_mac_info_cmp(const void *p1, const void *p2) | |
1490 | { | |
1491 | const struct fpm_mac_info_t *fpm_mac1 = p1; | |
1492 | const struct fpm_mac_info_t *fpm_mac2 = p2; | |
1493 | ||
1494 | if (memcmp(fpm_mac1->macaddr.octet, fpm_mac2->macaddr.octet, ETH_ALEN) | |
1495 | != 0) | |
1496 | return false; | |
1497 | if (fpm_mac1->r_vtep_ip.s_addr != fpm_mac2->r_vtep_ip.s_addr) | |
1498 | return false; | |
1499 | if (fpm_mac1->vni != fpm_mac2->vni) | |
1500 | return false; | |
1501 | ||
1502 | return true; | |
1503 | } | |
1504 | ||
1505 | /* | |
1506 | * Lookup FPM MAC info hash entry. | |
1507 | */ | |
1508 | static struct fpm_mac_info_t *zfpm_mac_info_lookup(struct fpm_mac_info_t *key) | |
1509 | { | |
1510 | return hash_lookup(zfpm_g->fpm_mac_info_table, key); | |
1511 | } | |
1512 | ||
1513 | /* | |
1514 | * Callback to allocate fpm_mac_info_t structure. | |
1515 | */ | |
1516 | static void *zfpm_mac_info_alloc(void *p) | |
1517 | { | |
1518 | const struct fpm_mac_info_t *key = p; | |
1519 | struct fpm_mac_info_t *fpm_mac; | |
1520 | ||
1521 | fpm_mac = XCALLOC(MTYPE_FPM_MAC_INFO, sizeof(struct fpm_mac_info_t)); | |
1522 | ||
1523 | memcpy(&fpm_mac->macaddr, &key->macaddr, ETH_ALEN); | |
1524 | memcpy(&fpm_mac->r_vtep_ip, &key->r_vtep_ip, sizeof(struct in_addr)); | |
1525 | fpm_mac->vni = key->vni; | |
1526 | ||
1527 | return (void *)fpm_mac; | |
1528 | } | |
1529 | ||
1530 | /* | |
1531 | * Delink and free fpm_mac_info_t. | |
1532 | */ | |
1533 | static void zfpm_mac_info_del(struct fpm_mac_info_t *fpm_mac) | |
1534 | { | |
1535 | hash_release(zfpm_g->fpm_mac_info_table, fpm_mac); | |
1536 | TAILQ_REMOVE(&zfpm_g->mac_q, fpm_mac, fpm_mac_q_entries); | |
1537 | XFREE(MTYPE_FPM_MAC_INFO, fpm_mac); | |
1538 | } | |
1539 | ||
1540 | /* | |
1541 | * zfpm_trigger_rmac_update | |
1542 | * | |
1543 | * Zebra code invokes this function to indicate that we should | |
1544 | * send an update to FPM for given MAC entry. | |
1545 | * | |
1546 | * This function checks if we already have enqueued an update for this RMAC, | |
1547 | * If yes, update the same fpm_mac_info_t. Else, create and enqueue an update. | |
1548 | */ | |
1549 | static int zfpm_trigger_rmac_update(zebra_mac_t *rmac, zebra_l3vni_t *zl3vni, | |
1550 | bool delete, const char *reason) | |
1551 | { | |
1552 | char buf[ETHER_ADDR_STRLEN]; | |
1553 | struct fpm_mac_info_t *fpm_mac, key; | |
1554 | struct interface *vxlan_if, *svi_if; | |
1555 | ||
1556 | /* | |
1557 | * Ignore if the connection is down. We will update the FPM about | |
1558 | * all destinations once the connection comes up. | |
1559 | */ | |
1560 | if (!zfpm_conn_is_up()) | |
1561 | return 0; | |
1562 | ||
1563 | if (reason) { | |
1564 | zfpm_debug("triggering update to FPM - Reason: %s - %s", | |
1565 | reason, | |
1566 | prefix_mac2str(&rmac->macaddr, buf, sizeof(buf))); | |
1567 | } | |
1568 | ||
1569 | vxlan_if = zl3vni_map_to_vxlan_if(zl3vni); | |
1570 | svi_if = zl3vni_map_to_svi_if(zl3vni); | |
1571 | ||
1572 | memset(&key, 0, sizeof(struct fpm_mac_info_t)); | |
1573 | ||
1574 | memcpy(&key.macaddr, &rmac->macaddr, ETH_ALEN); | |
1575 | key.r_vtep_ip.s_addr = rmac->fwd_info.r_vtep_ip.s_addr; | |
1576 | key.vni = zl3vni->vni; | |
1577 | ||
1578 | /* Check if this MAC is already present in the queue. */ | |
1579 | fpm_mac = zfpm_mac_info_lookup(&key); | |
1580 | ||
1581 | if (fpm_mac) { | |
1582 | if (!!CHECK_FLAG(fpm_mac->fpm_flags, ZEBRA_MAC_DELETE_FPM) | |
1583 | == delete) { | |
1584 | /* | |
1585 | * MAC is already present in the queue | |
1586 | * with the same op as this one. Do nothing | |
1587 | */ | |
1588 | zfpm_g->stats.redundant_triggers++; | |
1589 | return 0; | |
1590 | } | |
1591 | ||
1592 | /* | |
1593 | * A new op for an already existing fpm_mac_info_t node. | |
1594 | * Update the existing node for the new op. | |
1595 | */ | |
1596 | if (!delete) { | |
1597 | /* | |
1598 | * New op is "add". Previous op is "delete". | |
1599 | * Update the fpm_mac_info_t for the new add. | |
1600 | */ | |
1601 | fpm_mac->zebra_flags = rmac->flags; | |
1602 | ||
1603 | fpm_mac->vxlan_if = vxlan_if ? vxlan_if->ifindex : 0; | |
1604 | fpm_mac->svi_if = svi_if ? svi_if->ifindex : 0; | |
1605 | ||
1606 | UNSET_FLAG(fpm_mac->fpm_flags, ZEBRA_MAC_DELETE_FPM); | |
1607 | SET_FLAG(fpm_mac->fpm_flags, ZEBRA_MAC_UPDATE_FPM); | |
1608 | } else { | |
1609 | /* | |
1610 | * New op is "delete". Previous op is "add". | |
1611 | * Thus, no-op. Unset ZEBRA_MAC_UPDATE_FPM flag. | |
1612 | */ | |
1613 | SET_FLAG(fpm_mac->fpm_flags, ZEBRA_MAC_DELETE_FPM); | |
1614 | UNSET_FLAG(fpm_mac->fpm_flags, ZEBRA_MAC_UPDATE_FPM); | |
1615 | } | |
1616 | ||
1617 | return 0; | |
1618 | } | |
1619 | ||
1620 | fpm_mac = hash_get(zfpm_g->fpm_mac_info_table, &key, | |
1621 | zfpm_mac_info_alloc); | |
1622 | if (!fpm_mac) | |
1623 | return 0; | |
1624 | ||
1625 | fpm_mac->zebra_flags = rmac->flags; | |
1626 | fpm_mac->vxlan_if = vxlan_if ? vxlan_if->ifindex : 0; | |
1627 | fpm_mac->svi_if = svi_if ? svi_if->ifindex : 0; | |
1628 | ||
1629 | SET_FLAG(fpm_mac->fpm_flags, ZEBRA_MAC_UPDATE_FPM); | |
1630 | if (delete) | |
1631 | SET_FLAG(fpm_mac->fpm_flags, ZEBRA_MAC_DELETE_FPM); | |
1632 | ||
1633 | TAILQ_INSERT_TAIL(&zfpm_g->mac_q, fpm_mac, fpm_mac_q_entries); | |
1634 | ||
1635 | zfpm_g->stats.updates_triggered++; | |
1636 | ||
1637 | /* If writes are already enabled, return. */ | |
1638 | if (zfpm_g->t_write) | |
1639 | return 0; | |
1640 | ||
1641 | zfpm_write_on(); | |
1642 | return 0; | |
1643 | } | |
1644 | ||
1645 | /* | |
1646 | * This function is called when the FPM connections is established. | |
1647 | * Iterate over all the RMAC entries for the given L3VNI | |
1648 | * and enqueue the RMAC for FPM processing. | |
1649 | */ | |
1650 | static void zfpm_trigger_rmac_update_wrapper(struct hash_backet *backet, | |
1651 | void *args) | |
1652 | { | |
1653 | zebra_mac_t *zrmac = (zebra_mac_t *)backet->data; | |
1654 | zebra_l3vni_t *zl3vni = (zebra_l3vni_t *)args; | |
1655 | ||
1656 | zfpm_trigger_rmac_update(zrmac, zl3vni, false, "RMAC added"); | |
1657 | } | |
1658 | ||
1659 | /* | |
1660 | * This function is called when the FPM connections is established. | |
1661 | * This function iterates over all the L3VNIs to trigger | |
1662 | * FPM updates for RMACs currently available. | |
1663 | */ | |
1664 | static void zfpm_iterate_rmac_table(struct hash_backet *backet, void *args) | |
1665 | { | |
1666 | zebra_l3vni_t *zl3vni = (zebra_l3vni_t *)backet->data; | |
1667 | ||
1668 | hash_iterate(zl3vni->rmac_table, zfpm_trigger_rmac_update_wrapper, | |
1669 | (void *)zl3vni); | |
1670 | } | |
1671 | ||
1672 | /* | |
1673 | * zfpm_stats_timer_cb | |
1674 | */ | |
1675 | static int zfpm_stats_timer_cb(struct thread *t) | |
1676 | { | |
1677 | zfpm_g->t_stats = NULL; | |
1678 | ||
1679 | /* | |
1680 | * Remember the stats collected in the last interval for display | |
1681 | * purposes. | |
1682 | */ | |
1683 | zfpm_stats_copy(&zfpm_g->stats, &zfpm_g->last_ivl_stats); | |
1684 | ||
1685 | /* | |
1686 | * Add the current set of stats into the cumulative statistics. | |
1687 | */ | |
1688 | zfpm_stats_compose(&zfpm_g->cumulative_stats, &zfpm_g->stats, | |
1689 | &zfpm_g->cumulative_stats); | |
1690 | ||
1691 | /* | |
1692 | * Start collecting stats afresh over the next interval. | |
1693 | */ | |
1694 | zfpm_stats_reset(&zfpm_g->stats); | |
1695 | ||
1696 | zfpm_start_stats_timer(); | |
1697 | ||
1698 | return 0; | |
1699 | } | |
1700 | ||
1701 | /* | |
1702 | * zfpm_stop_stats_timer | |
1703 | */ | |
1704 | static void zfpm_stop_stats_timer(void) | |
1705 | { | |
1706 | if (!zfpm_g->t_stats) | |
1707 | return; | |
1708 | ||
1709 | zfpm_debug("Stopping existing stats timer"); | |
1710 | THREAD_TIMER_OFF(zfpm_g->t_stats); | |
1711 | } | |
1712 | ||
1713 | /* | |
1714 | * zfpm_start_stats_timer | |
1715 | */ | |
1716 | void zfpm_start_stats_timer(void) | |
1717 | { | |
1718 | assert(!zfpm_g->t_stats); | |
1719 | ||
1720 | thread_add_timer(zfpm_g->master, zfpm_stats_timer_cb, 0, | |
1721 | ZFPM_STATS_IVL_SECS, &zfpm_g->t_stats); | |
1722 | } | |
1723 | ||
1724 | /* | |
1725 | * Helper macro for zfpm_show_stats() below. | |
1726 | */ | |
1727 | #define ZFPM_SHOW_STAT(counter) \ | |
1728 | do { \ | |
1729 | vty_out(vty, "%-40s %10lu %16lu\n", #counter, \ | |
1730 | total_stats.counter, zfpm_g->last_ivl_stats.counter); \ | |
1731 | } while (0) | |
1732 | ||
1733 | /* | |
1734 | * zfpm_show_stats | |
1735 | */ | |
1736 | static void zfpm_show_stats(struct vty *vty) | |
1737 | { | |
1738 | zfpm_stats_t total_stats; | |
1739 | time_t elapsed; | |
1740 | ||
1741 | vty_out(vty, "\n%-40s %10s Last %2d secs\n\n", "Counter", "Total", | |
1742 | ZFPM_STATS_IVL_SECS); | |
1743 | ||
1744 | /* | |
1745 | * Compute the total stats up to this instant. | |
1746 | */ | |
1747 | zfpm_stats_compose(&zfpm_g->cumulative_stats, &zfpm_g->stats, | |
1748 | &total_stats); | |
1749 | ||
1750 | ZFPM_SHOW_STAT(connect_calls); | |
1751 | ZFPM_SHOW_STAT(connect_no_sock); | |
1752 | ZFPM_SHOW_STAT(read_cb_calls); | |
1753 | ZFPM_SHOW_STAT(write_cb_calls); | |
1754 | ZFPM_SHOW_STAT(write_calls); | |
1755 | ZFPM_SHOW_STAT(partial_writes); | |
1756 | ZFPM_SHOW_STAT(max_writes_hit); | |
1757 | ZFPM_SHOW_STAT(t_write_yields); | |
1758 | ZFPM_SHOW_STAT(nop_deletes_skipped); | |
1759 | ZFPM_SHOW_STAT(route_adds); | |
1760 | ZFPM_SHOW_STAT(route_dels); | |
1761 | ZFPM_SHOW_STAT(updates_triggered); | |
1762 | ZFPM_SHOW_STAT(redundant_triggers); | |
1763 | ZFPM_SHOW_STAT(dests_del_after_update); | |
1764 | ZFPM_SHOW_STAT(t_conn_down_starts); | |
1765 | ZFPM_SHOW_STAT(t_conn_down_dests_processed); | |
1766 | ZFPM_SHOW_STAT(t_conn_down_yields); | |
1767 | ZFPM_SHOW_STAT(t_conn_down_finishes); | |
1768 | ZFPM_SHOW_STAT(t_conn_up_starts); | |
1769 | ZFPM_SHOW_STAT(t_conn_up_dests_processed); | |
1770 | ZFPM_SHOW_STAT(t_conn_up_yields); | |
1771 | ZFPM_SHOW_STAT(t_conn_up_aborts); | |
1772 | ZFPM_SHOW_STAT(t_conn_up_finishes); | |
1773 | ||
1774 | if (!zfpm_g->last_stats_clear_time) | |
1775 | return; | |
1776 | ||
1777 | elapsed = zfpm_get_elapsed_time(zfpm_g->last_stats_clear_time); | |
1778 | ||
1779 | vty_out(vty, "\nStats were cleared %lu seconds ago\n", | |
1780 | (unsigned long)elapsed); | |
1781 | } | |
1782 | ||
1783 | /* | |
1784 | * zfpm_clear_stats | |
1785 | */ | |
1786 | static void zfpm_clear_stats(struct vty *vty) | |
1787 | { | |
1788 | if (!zfpm_is_enabled()) { | |
1789 | vty_out(vty, "The FPM module is not enabled...\n"); | |
1790 | return; | |
1791 | } | |
1792 | ||
1793 | zfpm_stats_reset(&zfpm_g->stats); | |
1794 | zfpm_stats_reset(&zfpm_g->last_ivl_stats); | |
1795 | zfpm_stats_reset(&zfpm_g->cumulative_stats); | |
1796 | ||
1797 | zfpm_stop_stats_timer(); | |
1798 | zfpm_start_stats_timer(); | |
1799 | ||
1800 | zfpm_g->last_stats_clear_time = monotime(NULL); | |
1801 | ||
1802 | vty_out(vty, "Cleared FPM stats\n"); | |
1803 | } | |
1804 | ||
1805 | /* | |
1806 | * show_zebra_fpm_stats | |
1807 | */ | |
1808 | DEFUN (show_zebra_fpm_stats, | |
1809 | show_zebra_fpm_stats_cmd, | |
1810 | "show zebra fpm stats", | |
1811 | SHOW_STR | |
1812 | ZEBRA_STR | |
1813 | "Forwarding Path Manager information\n" | |
1814 | "Statistics\n") | |
1815 | { | |
1816 | zfpm_show_stats(vty); | |
1817 | return CMD_SUCCESS; | |
1818 | } | |
1819 | ||
1820 | /* | |
1821 | * clear_zebra_fpm_stats | |
1822 | */ | |
1823 | DEFUN (clear_zebra_fpm_stats, | |
1824 | clear_zebra_fpm_stats_cmd, | |
1825 | "clear zebra fpm stats", | |
1826 | CLEAR_STR | |
1827 | ZEBRA_STR | |
1828 | "Clear Forwarding Path Manager information\n" | |
1829 | "Statistics\n") | |
1830 | { | |
1831 | zfpm_clear_stats(vty); | |
1832 | return CMD_SUCCESS; | |
1833 | } | |
1834 | ||
1835 | /* | |
1836 | * update fpm connection information | |
1837 | */ | |
1838 | DEFUN ( fpm_remote_ip, | |
1839 | fpm_remote_ip_cmd, | |
1840 | "fpm connection ip A.B.C.D port (1-65535)", | |
1841 | "fpm connection remote ip and port\n" | |
1842 | "Remote fpm server ip A.B.C.D\n" | |
1843 | "Enter ip ") | |
1844 | { | |
1845 | ||
1846 | in_addr_t fpm_server; | |
1847 | uint32_t port_no; | |
1848 | ||
1849 | fpm_server = inet_addr(argv[3]->arg); | |
1850 | if (fpm_server == INADDR_NONE) | |
1851 | return CMD_ERR_INCOMPLETE; | |
1852 | ||
1853 | port_no = atoi(argv[5]->arg); | |
1854 | if (port_no < TCP_MIN_PORT || port_no > TCP_MAX_PORT) | |
1855 | return CMD_ERR_INCOMPLETE; | |
1856 | ||
1857 | zfpm_g->fpm_server = fpm_server; | |
1858 | zfpm_g->fpm_port = port_no; | |
1859 | ||
1860 | ||
1861 | return CMD_SUCCESS; | |
1862 | } | |
1863 | ||
1864 | DEFUN ( no_fpm_remote_ip, | |
1865 | no_fpm_remote_ip_cmd, | |
1866 | "no fpm connection ip A.B.C.D port (1-65535)", | |
1867 | "fpm connection remote ip and port\n" | |
1868 | "Connection\n" | |
1869 | "Remote fpm server ip A.B.C.D\n" | |
1870 | "Enter ip ") | |
1871 | { | |
1872 | if (zfpm_g->fpm_server != inet_addr(argv[4]->arg) | |
1873 | || zfpm_g->fpm_port != atoi(argv[6]->arg)) | |
1874 | return CMD_ERR_NO_MATCH; | |
1875 | ||
1876 | zfpm_g->fpm_server = FPM_DEFAULT_IP; | |
1877 | zfpm_g->fpm_port = FPM_DEFAULT_PORT; | |
1878 | ||
1879 | return CMD_SUCCESS; | |
1880 | } | |
1881 | ||
1882 | /* | |
1883 | * zfpm_init_message_format | |
1884 | */ | |
1885 | static inline void zfpm_init_message_format(const char *format) | |
1886 | { | |
1887 | int have_netlink, have_protobuf; | |
1888 | ||
1889 | #ifdef HAVE_NETLINK | |
1890 | have_netlink = 1; | |
1891 | #else | |
1892 | have_netlink = 0; | |
1893 | #endif | |
1894 | ||
1895 | #ifdef HAVE_PROTOBUF | |
1896 | have_protobuf = 1; | |
1897 | #else | |
1898 | have_protobuf = 0; | |
1899 | #endif | |
1900 | ||
1901 | zfpm_g->message_format = ZFPM_MSG_FORMAT_NONE; | |
1902 | ||
1903 | if (!format) { | |
1904 | if (have_netlink) { | |
1905 | zfpm_g->message_format = ZFPM_MSG_FORMAT_NETLINK; | |
1906 | } else if (have_protobuf) { | |
1907 | zfpm_g->message_format = ZFPM_MSG_FORMAT_PROTOBUF; | |
1908 | } | |
1909 | return; | |
1910 | } | |
1911 | ||
1912 | if (!strcmp("netlink", format)) { | |
1913 | if (!have_netlink) { | |
1914 | flog_err(EC_ZEBRA_NETLINK_NOT_AVAILABLE, | |
1915 | "FPM netlink message format is not available"); | |
1916 | return; | |
1917 | } | |
1918 | zfpm_g->message_format = ZFPM_MSG_FORMAT_NETLINK; | |
1919 | return; | |
1920 | } | |
1921 | ||
1922 | if (!strcmp("protobuf", format)) { | |
1923 | if (!have_protobuf) { | |
1924 | flog_err( | |
1925 | EC_ZEBRA_PROTOBUF_NOT_AVAILABLE, | |
1926 | "FPM protobuf message format is not available"); | |
1927 | return; | |
1928 | } | |
1929 | flog_warn(EC_ZEBRA_PROTOBUF_NOT_AVAILABLE, | |
1930 | "FPM protobuf message format is deprecated and scheduled to be removed. " | |
1931 | "Please convert to using netlink format or contact dev@lists.frrouting.org with your use case."); | |
1932 | zfpm_g->message_format = ZFPM_MSG_FORMAT_PROTOBUF; | |
1933 | return; | |
1934 | } | |
1935 | ||
1936 | flog_warn(EC_ZEBRA_FPM_FORMAT_UNKNOWN, "Unknown fpm format '%s'", | |
1937 | format); | |
1938 | } | |
1939 | ||
1940 | /** | |
1941 | * fpm_remote_srv_write | |
1942 | * | |
1943 | * Module to write remote fpm connection | |
1944 | * | |
1945 | * Returns ZERO on success. | |
1946 | */ | |
1947 | ||
1948 | static int fpm_remote_srv_write(struct vty *vty) | |
1949 | { | |
1950 | struct in_addr in; | |
1951 | ||
1952 | in.s_addr = zfpm_g->fpm_server; | |
1953 | ||
1954 | if ((zfpm_g->fpm_server != FPM_DEFAULT_IP | |
1955 | && zfpm_g->fpm_server != INADDR_ANY) | |
1956 | || (zfpm_g->fpm_port != FPM_DEFAULT_PORT && zfpm_g->fpm_port != 0)) | |
1957 | vty_out(vty, "fpm connection ip %s port %d\n", inet_ntoa(in), | |
1958 | zfpm_g->fpm_port); | |
1959 | ||
1960 | return 0; | |
1961 | } | |
1962 | ||
1963 | ||
1964 | /* Zebra node */ | |
1965 | static struct cmd_node zebra_node = {ZEBRA_NODE, "", 1}; | |
1966 | ||
1967 | ||
1968 | /** | |
1969 | * zfpm_init | |
1970 | * | |
1971 | * One-time initialization of the Zebra FPM module. | |
1972 | * | |
1973 | * @param[in] port port at which FPM is running. | |
1974 | * @param[in] enable true if the zebra FPM module should be enabled | |
1975 | * @param[in] format to use to talk to the FPM. Can be 'netink' or 'protobuf'. | |
1976 | * | |
1977 | * Returns true on success. | |
1978 | */ | |
1979 | static int zfpm_init(struct thread_master *master) | |
1980 | { | |
1981 | int enable = 1; | |
1982 | uint16_t port = 0; | |
1983 | const char *format = THIS_MODULE->load_args; | |
1984 | ||
1985 | memset(zfpm_g, 0, sizeof(*zfpm_g)); | |
1986 | zfpm_g->master = master; | |
1987 | TAILQ_INIT(&zfpm_g->dest_q); | |
1988 | TAILQ_INIT(&zfpm_g->mac_q); | |
1989 | ||
1990 | /* Create hash table for fpm_mac_info_t enties */ | |
1991 | zfpm_g->fpm_mac_info_table = hash_create(zfpm_mac_info_hash_keymake, | |
1992 | zfpm_mac_info_cmp, | |
1993 | "FPM MAC info hash table"); | |
1994 | ||
1995 | zfpm_g->sock = -1; | |
1996 | zfpm_g->state = ZFPM_STATE_IDLE; | |
1997 | ||
1998 | zfpm_stats_init(&zfpm_g->stats); | |
1999 | zfpm_stats_init(&zfpm_g->last_ivl_stats); | |
2000 | zfpm_stats_init(&zfpm_g->cumulative_stats); | |
2001 | ||
2002 | install_node(&zebra_node, fpm_remote_srv_write); | |
2003 | install_element(ENABLE_NODE, &show_zebra_fpm_stats_cmd); | |
2004 | install_element(ENABLE_NODE, &clear_zebra_fpm_stats_cmd); | |
2005 | install_element(CONFIG_NODE, &fpm_remote_ip_cmd); | |
2006 | install_element(CONFIG_NODE, &no_fpm_remote_ip_cmd); | |
2007 | ||
2008 | zfpm_init_message_format(format); | |
2009 | ||
2010 | /* | |
2011 | * Disable FPM interface if no suitable format is available. | |
2012 | */ | |
2013 | if (zfpm_g->message_format == ZFPM_MSG_FORMAT_NONE) | |
2014 | enable = 0; | |
2015 | ||
2016 | zfpm_g->enabled = enable; | |
2017 | ||
2018 | if (!zfpm_g->fpm_server) | |
2019 | zfpm_g->fpm_server = FPM_DEFAULT_IP; | |
2020 | ||
2021 | if (!port) | |
2022 | port = FPM_DEFAULT_PORT; | |
2023 | ||
2024 | zfpm_g->fpm_port = port; | |
2025 | ||
2026 | zfpm_g->obuf = stream_new(ZFPM_OBUF_SIZE); | |
2027 | zfpm_g->ibuf = stream_new(ZFPM_IBUF_SIZE); | |
2028 | ||
2029 | zfpm_start_stats_timer(); | |
2030 | zfpm_start_connect_timer("initialized"); | |
2031 | return 0; | |
2032 | } | |
2033 | ||
2034 | static int zfpm_fini(void) | |
2035 | { | |
2036 | zfpm_write_off(); | |
2037 | zfpm_read_off(); | |
2038 | zfpm_connect_off(); | |
2039 | ||
2040 | zfpm_stop_stats_timer(); | |
2041 | ||
2042 | hook_unregister(rib_update, zfpm_trigger_update); | |
2043 | return 0; | |
2044 | } | |
2045 | ||
2046 | static int zebra_fpm_module_init(void) | |
2047 | { | |
2048 | hook_register(rib_update, zfpm_trigger_update); | |
2049 | hook_register(zebra_rmac_update, zfpm_trigger_rmac_update); | |
2050 | hook_register(frr_late_init, zfpm_init); | |
2051 | hook_register(frr_early_fini, zfpm_fini); | |
2052 | return 0; | |
2053 | } | |
2054 | ||
2055 | FRR_MODULE_SETUP(.name = "zebra_fpm", .version = FRR_VERSION, | |
2056 | .description = "zebra FPM (Forwarding Plane Manager) module", | |
2057 | .init = zebra_fpm_module_init, ) |