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5adc2528 AS |
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 | |
20 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
21 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
22 | * 02111-1307, USA. | |
23 | */ | |
24 | ||
25 | #include <zebra.h> | |
26 | ||
27 | #include "log.h" | |
28 | #include "stream.h" | |
29 | #include "thread.h" | |
30 | #include "network.h" | |
31 | #include "command.h" | |
32 | ||
33 | #include "zebra/rib.h" | |
7c551956 DS |
34 | #include "zebra/zserv.h" |
35 | #include "zebra/zebra_ns.h" | |
36 | #include "zebra/zebra_vrf.h" | |
5adc2528 AS |
37 | |
38 | #include "fpm/fpm.h" | |
39 | #include "zebra_fpm.h" | |
40 | #include "zebra_fpm_private.h" | |
41 | ||
42 | /* | |
43 | * Interval at which we attempt to connect to the FPM. | |
44 | */ | |
45 | #define ZFPM_CONNECT_RETRY_IVL 5 | |
46 | ||
47 | /* | |
48 | * Sizes of outgoing and incoming stream buffers for writing/reading | |
49 | * FPM messages. | |
50 | */ | |
51 | #define ZFPM_OBUF_SIZE (2 * FPM_MAX_MSG_LEN) | |
52 | #define ZFPM_IBUF_SIZE (FPM_MAX_MSG_LEN) | |
53 | ||
54 | /* | |
55 | * The maximum number of times the FPM socket write callback can call | |
56 | * 'write' before it yields. | |
57 | */ | |
58 | #define ZFPM_MAX_WRITES_PER_RUN 10 | |
59 | ||
60 | /* | |
61 | * Interval over which we collect statistics. | |
62 | */ | |
63 | #define ZFPM_STATS_IVL_SECS 10 | |
64 | ||
65 | /* | |
66 | * Structure that holds state for iterating over all route_node | |
67 | * structures that are candidates for being communicated to the FPM. | |
68 | */ | |
69 | typedef struct zfpm_rnodes_iter_t_ | |
70 | { | |
71 | rib_tables_iter_t tables_iter; | |
72 | route_table_iter_t iter; | |
73 | } zfpm_rnodes_iter_t; | |
74 | ||
75 | /* | |
76 | * Statistics. | |
77 | */ | |
78 | typedef struct zfpm_stats_t_ { | |
79 | unsigned long connect_calls; | |
80 | unsigned long connect_no_sock; | |
81 | ||
82 | unsigned long read_cb_calls; | |
83 | ||
84 | unsigned long write_cb_calls; | |
85 | unsigned long write_calls; | |
86 | unsigned long partial_writes; | |
87 | unsigned long max_writes_hit; | |
88 | unsigned long t_write_yields; | |
89 | ||
90 | unsigned long nop_deletes_skipped; | |
91 | unsigned long route_adds; | |
92 | unsigned long route_dels; | |
93 | ||
94 | unsigned long updates_triggered; | |
95 | unsigned long redundant_triggers; | |
96 | unsigned long non_fpm_table_triggers; | |
97 | ||
98 | unsigned long dests_del_after_update; | |
99 | ||
100 | unsigned long t_conn_down_starts; | |
101 | unsigned long t_conn_down_dests_processed; | |
102 | unsigned long t_conn_down_yields; | |
103 | unsigned long t_conn_down_finishes; | |
104 | ||
105 | unsigned long t_conn_up_starts; | |
106 | unsigned long t_conn_up_dests_processed; | |
107 | unsigned long t_conn_up_yields; | |
108 | unsigned long t_conn_up_aborts; | |
109 | unsigned long t_conn_up_finishes; | |
110 | ||
111 | } zfpm_stats_t; | |
112 | ||
113 | /* | |
114 | * States for the FPM state machine. | |
115 | */ | |
116 | typedef enum { | |
117 | ||
118 | /* | |
119 | * In this state we are not yet ready to connect to the FPM. This | |
120 | * can happen when this module is disabled, or if we're cleaning up | |
121 | * after a connection has gone down. | |
122 | */ | |
123 | ZFPM_STATE_IDLE, | |
124 | ||
125 | /* | |
126 | * Ready to talk to the FPM and periodically trying to connect to | |
127 | * it. | |
128 | */ | |
129 | ZFPM_STATE_ACTIVE, | |
130 | ||
131 | /* | |
132 | * In the middle of bringing up a TCP connection. Specifically, | |
133 | * waiting for a connect() call to complete asynchronously. | |
134 | */ | |
135 | ZFPM_STATE_CONNECTING, | |
136 | ||
137 | /* | |
138 | * TCP connection to the FPM is up. | |
139 | */ | |
140 | ZFPM_STATE_ESTABLISHED | |
141 | ||
142 | } zfpm_state_t; | |
143 | ||
fb0aa886 AS |
144 | /* |
145 | * Message format to be used to communicate with the FPM. | |
146 | */ | |
147 | typedef enum | |
148 | { | |
149 | ZFPM_MSG_FORMAT_NONE, | |
150 | ZFPM_MSG_FORMAT_NETLINK, | |
151 | ZFPM_MSG_FORMAT_PROTOBUF, | |
152 | } zfpm_msg_format_e; | |
5adc2528 AS |
153 | /* |
154 | * Globals. | |
155 | */ | |
156 | typedef struct zfpm_glob_t_ | |
157 | { | |
158 | ||
159 | /* | |
160 | * True if the FPM module has been enabled. | |
161 | */ | |
162 | int enabled; | |
163 | ||
fb0aa886 AS |
164 | /* |
165 | * Message format to be used to communicate with the fpm. | |
166 | */ | |
167 | zfpm_msg_format_e message_format; | |
168 | ||
5adc2528 AS |
169 | struct thread_master *master; |
170 | ||
171 | zfpm_state_t state; | |
172 | ||
711ff0ba | 173 | in_addr_t fpm_server; |
5adc2528 AS |
174 | /* |
175 | * Port on which the FPM is running. | |
176 | */ | |
177 | int fpm_port; | |
178 | ||
179 | /* | |
180 | * List of rib_dest_t structures to be processed | |
181 | */ | |
182 | TAILQ_HEAD (zfpm_dest_q, rib_dest_t_) dest_q; | |
183 | ||
184 | /* | |
185 | * Stream socket to the FPM. | |
186 | */ | |
187 | int sock; | |
188 | ||
189 | /* | |
190 | * Buffers for messages to/from the FPM. | |
191 | */ | |
192 | struct stream *obuf; | |
193 | struct stream *ibuf; | |
194 | ||
195 | /* | |
196 | * Threads for I/O. | |
197 | */ | |
198 | struct thread *t_connect; | |
199 | struct thread *t_write; | |
200 | struct thread *t_read; | |
201 | ||
202 | /* | |
203 | * Thread to clean up after the TCP connection to the FPM goes down | |
204 | * and the state that belongs to it. | |
205 | */ | |
206 | struct thread *t_conn_down; | |
207 | ||
208 | struct { | |
209 | zfpm_rnodes_iter_t iter; | |
210 | } t_conn_down_state; | |
211 | ||
212 | /* | |
213 | * Thread to take actions once the TCP conn to the FPM comes up, and | |
214 | * the state that belongs to it. | |
215 | */ | |
216 | struct thread *t_conn_up; | |
217 | ||
218 | struct { | |
219 | zfpm_rnodes_iter_t iter; | |
220 | } t_conn_up_state; | |
221 | ||
222 | unsigned long connect_calls; | |
223 | time_t last_connect_call_time; | |
224 | ||
225 | /* | |
226 | * Stats from the start of the current statistics interval up to | |
227 | * now. These are the counters we typically update in the code. | |
228 | */ | |
229 | zfpm_stats_t stats; | |
230 | ||
231 | /* | |
232 | * Statistics that were gathered in the last collection interval. | |
233 | */ | |
234 | zfpm_stats_t last_ivl_stats; | |
235 | ||
236 | /* | |
237 | * Cumulative stats from the last clear to the start of the current | |
238 | * statistics interval. | |
239 | */ | |
240 | zfpm_stats_t cumulative_stats; | |
241 | ||
242 | /* | |
243 | * Stats interval timer. | |
244 | */ | |
245 | struct thread *t_stats; | |
246 | ||
247 | /* | |
248 | * If non-zero, the last time when statistics were cleared. | |
249 | */ | |
250 | time_t last_stats_clear_time; | |
251 | ||
252 | } zfpm_glob_t; | |
253 | ||
254 | static zfpm_glob_t zfpm_glob_space; | |
255 | static zfpm_glob_t *zfpm_g = &zfpm_glob_space; | |
256 | ||
257 | static int zfpm_read_cb (struct thread *thread); | |
258 | static int zfpm_write_cb (struct thread *thread); | |
259 | ||
260 | static void zfpm_set_state (zfpm_state_t state, const char *reason); | |
261 | static void zfpm_start_connect_timer (const char *reason); | |
262 | static void zfpm_start_stats_timer (void); | |
263 | ||
264 | /* | |
265 | * zfpm_thread_should_yield | |
266 | */ | |
267 | static inline int | |
268 | zfpm_thread_should_yield (struct thread *t) | |
269 | { | |
270 | return thread_should_yield (t); | |
271 | } | |
272 | ||
273 | /* | |
274 | * zfpm_state_to_str | |
275 | */ | |
276 | static const char * | |
277 | zfpm_state_to_str (zfpm_state_t state) | |
278 | { | |
279 | switch (state) | |
280 | { | |
281 | ||
282 | case ZFPM_STATE_IDLE: | |
283 | return "idle"; | |
284 | ||
285 | case ZFPM_STATE_ACTIVE: | |
286 | return "active"; | |
287 | ||
288 | case ZFPM_STATE_CONNECTING: | |
289 | return "connecting"; | |
290 | ||
291 | case ZFPM_STATE_ESTABLISHED: | |
292 | return "established"; | |
293 | ||
294 | default: | |
295 | return "unknown"; | |
296 | } | |
297 | } | |
298 | ||
5adc2528 AS |
299 | /* |
300 | * zfpm_get_elapsed_time | |
301 | * | |
302 | * Returns the time elapsed (in seconds) since the given time. | |
303 | */ | |
304 | static time_t | |
305 | zfpm_get_elapsed_time (time_t reference) | |
306 | { | |
307 | time_t now; | |
308 | ||
cf672a86 | 309 | now = monotime(NULL); |
5adc2528 AS |
310 | |
311 | if (now < reference) | |
312 | { | |
313 | assert (0); | |
314 | return 0; | |
315 | } | |
316 | ||
317 | return now - reference; | |
318 | } | |
319 | ||
320 | /* | |
321 | * zfpm_is_table_for_fpm | |
322 | * | |
323 | * Returns TRUE if the the given table is to be communicated to the | |
324 | * FPM. | |
325 | */ | |
326 | static inline int | |
327 | zfpm_is_table_for_fpm (struct route_table *table) | |
328 | { | |
329 | rib_table_info_t *info; | |
330 | ||
331 | info = rib_table_info (table); | |
332 | ||
333 | /* | |
334 | * We only send the unicast tables in the main instance to the FPM | |
335 | * at this point. | |
336 | */ | |
661512bf | 337 | if (zvrf_id (info->zvrf) != 0) |
5adc2528 AS |
338 | return 0; |
339 | ||
340 | if (info->safi != SAFI_UNICAST) | |
341 | return 0; | |
342 | ||
343 | return 1; | |
344 | } | |
345 | ||
346 | /* | |
347 | * zfpm_rnodes_iter_init | |
348 | */ | |
349 | static inline void | |
350 | zfpm_rnodes_iter_init (zfpm_rnodes_iter_t *iter) | |
351 | { | |
352 | memset (iter, 0, sizeof (*iter)); | |
353 | rib_tables_iter_init (&iter->tables_iter); | |
354 | ||
355 | /* | |
356 | * This is a hack, but it makes implementing 'next' easier by | |
357 | * ensuring that route_table_iter_next() will return NULL the first | |
358 | * time we call it. | |
359 | */ | |
360 | route_table_iter_init (&iter->iter, NULL); | |
361 | route_table_iter_cleanup (&iter->iter); | |
362 | } | |
363 | ||
364 | /* | |
365 | * zfpm_rnodes_iter_next | |
366 | */ | |
367 | static inline struct route_node * | |
368 | zfpm_rnodes_iter_next (zfpm_rnodes_iter_t *iter) | |
369 | { | |
370 | struct route_node *rn; | |
371 | struct route_table *table; | |
372 | ||
373 | while (1) | |
374 | { | |
375 | rn = route_table_iter_next (&iter->iter); | |
376 | if (rn) | |
377 | return rn; | |
378 | ||
379 | /* | |
380 | * We've made our way through this table, go to the next one. | |
381 | */ | |
382 | route_table_iter_cleanup (&iter->iter); | |
383 | ||
384 | while ((table = rib_tables_iter_next (&iter->tables_iter))) | |
385 | { | |
386 | if (zfpm_is_table_for_fpm (table)) | |
387 | break; | |
388 | } | |
389 | ||
390 | if (!table) | |
391 | return NULL; | |
392 | ||
393 | route_table_iter_init (&iter->iter, table); | |
394 | } | |
395 | ||
396 | return NULL; | |
397 | } | |
398 | ||
399 | /* | |
400 | * zfpm_rnodes_iter_pause | |
401 | */ | |
402 | static inline void | |
403 | zfpm_rnodes_iter_pause (zfpm_rnodes_iter_t *iter) | |
404 | { | |
405 | route_table_iter_pause (&iter->iter); | |
406 | } | |
407 | ||
408 | /* | |
409 | * zfpm_rnodes_iter_cleanup | |
410 | */ | |
411 | static inline void | |
412 | zfpm_rnodes_iter_cleanup (zfpm_rnodes_iter_t *iter) | |
413 | { | |
414 | route_table_iter_cleanup (&iter->iter); | |
415 | rib_tables_iter_cleanup (&iter->tables_iter); | |
416 | } | |
417 | ||
418 | /* | |
419 | * zfpm_stats_init | |
420 | * | |
421 | * Initialize a statistics block. | |
422 | */ | |
423 | static inline void | |
424 | zfpm_stats_init (zfpm_stats_t *stats) | |
425 | { | |
426 | memset (stats, 0, sizeof (*stats)); | |
427 | } | |
428 | ||
429 | /* | |
430 | * zfpm_stats_reset | |
431 | */ | |
432 | static inline void | |
433 | zfpm_stats_reset (zfpm_stats_t *stats) | |
434 | { | |
435 | zfpm_stats_init (stats); | |
436 | } | |
437 | ||
438 | /* | |
439 | * zfpm_stats_copy | |
440 | */ | |
441 | static inline void | |
442 | zfpm_stats_copy (const zfpm_stats_t *src, zfpm_stats_t *dest) | |
443 | { | |
444 | memcpy (dest, src, sizeof (*dest)); | |
445 | } | |
446 | ||
447 | /* | |
448 | * zfpm_stats_compose | |
449 | * | |
450 | * Total up the statistics in two stats structures ('s1 and 's2') and | |
451 | * return the result in the third argument, 'result'. Note that the | |
452 | * pointer 'result' may be the same as 's1' or 's2'. | |
453 | * | |
454 | * For simplicity, the implementation below assumes that the stats | |
455 | * structure is composed entirely of counters. This can easily be | |
456 | * changed when necessary. | |
457 | */ | |
458 | static void | |
459 | zfpm_stats_compose (const zfpm_stats_t *s1, const zfpm_stats_t *s2, | |
460 | zfpm_stats_t *result) | |
461 | { | |
462 | const unsigned long *p1, *p2; | |
463 | unsigned long *result_p; | |
464 | int i, num_counters; | |
465 | ||
466 | p1 = (const unsigned long *) s1; | |
467 | p2 = (const unsigned long *) s2; | |
468 | result_p = (unsigned long *) result; | |
469 | ||
470 | num_counters = (sizeof (zfpm_stats_t) / sizeof (unsigned long)); | |
471 | ||
472 | for (i = 0; i < num_counters; i++) | |
473 | { | |
474 | result_p[i] = p1[i] + p2[i]; | |
475 | } | |
476 | } | |
477 | ||
478 | /* | |
479 | * zfpm_read_on | |
480 | */ | |
481 | static inline void | |
482 | zfpm_read_on (void) | |
483 | { | |
484 | assert (!zfpm_g->t_read); | |
485 | assert (zfpm_g->sock >= 0); | |
486 | ||
487 | THREAD_READ_ON (zfpm_g->master, zfpm_g->t_read, zfpm_read_cb, 0, | |
488 | zfpm_g->sock); | |
489 | } | |
490 | ||
491 | /* | |
492 | * zfpm_write_on | |
493 | */ | |
494 | static inline void | |
495 | zfpm_write_on (void) | |
496 | { | |
497 | assert (!zfpm_g->t_write); | |
498 | assert (zfpm_g->sock >= 0); | |
499 | ||
500 | THREAD_WRITE_ON (zfpm_g->master, zfpm_g->t_write, zfpm_write_cb, 0, | |
501 | zfpm_g->sock); | |
502 | } | |
503 | ||
504 | /* | |
505 | * zfpm_read_off | |
506 | */ | |
507 | static inline void | |
508 | zfpm_read_off (void) | |
509 | { | |
510 | THREAD_READ_OFF (zfpm_g->t_read); | |
511 | } | |
512 | ||
513 | /* | |
514 | * zfpm_write_off | |
515 | */ | |
516 | static inline void | |
517 | zfpm_write_off (void) | |
518 | { | |
519 | THREAD_WRITE_OFF (zfpm_g->t_write); | |
520 | } | |
521 | ||
522 | /* | |
523 | * zfpm_conn_up_thread_cb | |
524 | * | |
525 | * Callback for actions to be taken when the connection to the FPM | |
526 | * comes up. | |
527 | */ | |
528 | static int | |
529 | zfpm_conn_up_thread_cb (struct thread *thread) | |
530 | { | |
531 | struct route_node *rnode; | |
532 | zfpm_rnodes_iter_t *iter; | |
533 | rib_dest_t *dest; | |
534 | ||
535 | assert (zfpm_g->t_conn_up); | |
536 | zfpm_g->t_conn_up = NULL; | |
537 | ||
538 | iter = &zfpm_g->t_conn_up_state.iter; | |
539 | ||
540 | if (zfpm_g->state != ZFPM_STATE_ESTABLISHED) | |
541 | { | |
542 | zfpm_debug ("Connection not up anymore, conn_up thread aborting"); | |
543 | zfpm_g->stats.t_conn_up_aborts++; | |
544 | goto done; | |
545 | } | |
546 | ||
547 | while ((rnode = zfpm_rnodes_iter_next (iter))) | |
548 | { | |
549 | dest = rib_dest_from_rnode (rnode); | |
550 | ||
551 | if (dest) | |
552 | { | |
553 | zfpm_g->stats.t_conn_up_dests_processed++; | |
554 | zfpm_trigger_update (rnode, NULL); | |
555 | } | |
556 | ||
557 | /* | |
558 | * Yield if need be. | |
559 | */ | |
560 | if (!zfpm_thread_should_yield (thread)) | |
561 | continue; | |
562 | ||
563 | zfpm_g->stats.t_conn_up_yields++; | |
564 | zfpm_rnodes_iter_pause (iter); | |
565 | zfpm_g->t_conn_up = thread_add_background (zfpm_g->master, | |
566 | zfpm_conn_up_thread_cb, | |
567 | 0, 0); | |
568 | return 0; | |
569 | } | |
570 | ||
571 | zfpm_g->stats.t_conn_up_finishes++; | |
572 | ||
573 | done: | |
574 | zfpm_rnodes_iter_cleanup (iter); | |
575 | return 0; | |
576 | } | |
577 | ||
578 | /* | |
579 | * zfpm_connection_up | |
580 | * | |
581 | * Called when the connection to the FPM comes up. | |
582 | */ | |
583 | static void | |
584 | zfpm_connection_up (const char *detail) | |
585 | { | |
586 | assert (zfpm_g->sock >= 0); | |
587 | zfpm_read_on (); | |
588 | zfpm_write_on (); | |
589 | zfpm_set_state (ZFPM_STATE_ESTABLISHED, detail); | |
590 | ||
591 | /* | |
592 | * Start thread to push existing routes to the FPM. | |
593 | */ | |
594 | assert (!zfpm_g->t_conn_up); | |
595 | ||
596 | zfpm_rnodes_iter_init (&zfpm_g->t_conn_up_state.iter); | |
597 | ||
598 | zfpm_debug ("Starting conn_up thread"); | |
599 | zfpm_g->t_conn_up = thread_add_background (zfpm_g->master, | |
600 | zfpm_conn_up_thread_cb, 0, 0); | |
601 | zfpm_g->stats.t_conn_up_starts++; | |
602 | } | |
603 | ||
604 | /* | |
605 | * zfpm_connect_check | |
606 | * | |
607 | * Check if an asynchronous connect() to the FPM is complete. | |
608 | */ | |
609 | static void | |
35dece84 | 610 | zfpm_connect_check (void) |
5adc2528 AS |
611 | { |
612 | int status; | |
613 | socklen_t slen; | |
614 | int ret; | |
615 | ||
616 | zfpm_read_off (); | |
617 | zfpm_write_off (); | |
618 | ||
619 | slen = sizeof (status); | |
620 | ret = getsockopt (zfpm_g->sock, SOL_SOCKET, SO_ERROR, (void *) &status, | |
621 | &slen); | |
622 | ||
623 | if (ret >= 0 && status == 0) | |
624 | { | |
625 | zfpm_connection_up ("async connect complete"); | |
626 | return; | |
627 | } | |
628 | ||
629 | /* | |
630 | * getsockopt() failed or indicated an error on the socket. | |
631 | */ | |
632 | close (zfpm_g->sock); | |
633 | zfpm_g->sock = -1; | |
634 | ||
635 | zfpm_start_connect_timer ("getsockopt() after async connect failed"); | |
636 | return; | |
637 | } | |
638 | ||
639 | /* | |
640 | * zfpm_conn_down_thread_cb | |
641 | * | |
642 | * Callback that is invoked to clean up state after the TCP connection | |
643 | * to the FPM goes down. | |
644 | */ | |
645 | static int | |
646 | zfpm_conn_down_thread_cb (struct thread *thread) | |
647 | { | |
648 | struct route_node *rnode; | |
649 | zfpm_rnodes_iter_t *iter; | |
650 | rib_dest_t *dest; | |
651 | ||
652 | assert (zfpm_g->state == ZFPM_STATE_IDLE); | |
653 | ||
654 | assert (zfpm_g->t_conn_down); | |
655 | zfpm_g->t_conn_down = NULL; | |
656 | ||
657 | iter = &zfpm_g->t_conn_down_state.iter; | |
658 | ||
659 | while ((rnode = zfpm_rnodes_iter_next (iter))) | |
660 | { | |
661 | dest = rib_dest_from_rnode (rnode); | |
662 | ||
663 | if (dest) | |
664 | { | |
665 | if (CHECK_FLAG (dest->flags, RIB_DEST_UPDATE_FPM)) | |
666 | { | |
667 | TAILQ_REMOVE (&zfpm_g->dest_q, dest, fpm_q_entries); | |
668 | } | |
669 | ||
670 | UNSET_FLAG (dest->flags, RIB_DEST_UPDATE_FPM); | |
671 | UNSET_FLAG (dest->flags, RIB_DEST_SENT_TO_FPM); | |
672 | ||
673 | zfpm_g->stats.t_conn_down_dests_processed++; | |
674 | ||
675 | /* | |
676 | * Check if the dest should be deleted. | |
677 | */ | |
678 | rib_gc_dest(rnode); | |
679 | } | |
680 | ||
681 | /* | |
682 | * Yield if need be. | |
683 | */ | |
684 | if (!zfpm_thread_should_yield (thread)) | |
685 | continue; | |
686 | ||
687 | zfpm_g->stats.t_conn_down_yields++; | |
688 | zfpm_rnodes_iter_pause (iter); | |
689 | zfpm_g->t_conn_down = thread_add_background (zfpm_g->master, | |
690 | zfpm_conn_down_thread_cb, | |
691 | 0, 0); | |
692 | return 0; | |
693 | } | |
694 | ||
695 | zfpm_g->stats.t_conn_down_finishes++; | |
696 | zfpm_rnodes_iter_cleanup (iter); | |
697 | ||
698 | /* | |
699 | * Start the process of connecting to the FPM again. | |
700 | */ | |
701 | zfpm_start_connect_timer ("cleanup complete"); | |
702 | return 0; | |
703 | } | |
704 | ||
705 | /* | |
706 | * zfpm_connection_down | |
707 | * | |
708 | * Called when the connection to the FPM has gone down. | |
709 | */ | |
710 | static void | |
711 | zfpm_connection_down (const char *detail) | |
712 | { | |
713 | if (!detail) | |
714 | detail = "unknown"; | |
715 | ||
716 | assert (zfpm_g->state == ZFPM_STATE_ESTABLISHED); | |
717 | ||
718 | zlog_info ("connection to the FPM has gone down: %s", detail); | |
719 | ||
720 | zfpm_read_off (); | |
721 | zfpm_write_off (); | |
722 | ||
723 | stream_reset (zfpm_g->ibuf); | |
724 | stream_reset (zfpm_g->obuf); | |
725 | ||
726 | if (zfpm_g->sock >= 0) { | |
727 | close (zfpm_g->sock); | |
728 | zfpm_g->sock = -1; | |
729 | } | |
730 | ||
731 | /* | |
732 | * Start thread to clean up state after the connection goes down. | |
733 | */ | |
734 | assert (!zfpm_g->t_conn_down); | |
735 | zfpm_debug ("Starting conn_down thread"); | |
736 | zfpm_rnodes_iter_init (&zfpm_g->t_conn_down_state.iter); | |
737 | zfpm_g->t_conn_down = thread_add_background (zfpm_g->master, | |
738 | zfpm_conn_down_thread_cb, 0, 0); | |
739 | zfpm_g->stats.t_conn_down_starts++; | |
740 | ||
741 | zfpm_set_state (ZFPM_STATE_IDLE, detail); | |
742 | } | |
743 | ||
744 | /* | |
745 | * zfpm_read_cb | |
746 | */ | |
747 | static int | |
748 | zfpm_read_cb (struct thread *thread) | |
749 | { | |
750 | size_t already; | |
751 | struct stream *ibuf; | |
752 | uint16_t msg_len; | |
753 | fpm_msg_hdr_t *hdr; | |
754 | ||
755 | zfpm_g->stats.read_cb_calls++; | |
756 | assert (zfpm_g->t_read); | |
757 | zfpm_g->t_read = NULL; | |
758 | ||
759 | /* | |
760 | * Check if async connect is now done. | |
761 | */ | |
762 | if (zfpm_g->state == ZFPM_STATE_CONNECTING) | |
763 | { | |
764 | zfpm_connect_check(); | |
765 | return 0; | |
766 | } | |
767 | ||
768 | assert (zfpm_g->state == ZFPM_STATE_ESTABLISHED); | |
769 | assert (zfpm_g->sock >= 0); | |
770 | ||
771 | ibuf = zfpm_g->ibuf; | |
772 | ||
773 | already = stream_get_endp (ibuf); | |
774 | if (already < FPM_MSG_HDR_LEN) | |
775 | { | |
776 | ssize_t nbyte; | |
777 | ||
778 | nbyte = stream_read_try (ibuf, zfpm_g->sock, FPM_MSG_HDR_LEN - already); | |
779 | if (nbyte == 0 || nbyte == -1) | |
780 | { | |
781 | zfpm_connection_down ("closed socket in read"); | |
782 | return 0; | |
783 | } | |
784 | ||
785 | if (nbyte != (ssize_t) (FPM_MSG_HDR_LEN - already)) | |
786 | goto done; | |
787 | ||
788 | already = FPM_MSG_HDR_LEN; | |
789 | } | |
790 | ||
791 | stream_set_getp (ibuf, 0); | |
792 | ||
793 | hdr = (fpm_msg_hdr_t *) stream_pnt (ibuf); | |
794 | ||
795 | if (!fpm_msg_hdr_ok (hdr)) | |
796 | { | |
797 | zfpm_connection_down ("invalid message header"); | |
798 | return 0; | |
799 | } | |
800 | ||
801 | msg_len = fpm_msg_len (hdr); | |
802 | ||
803 | /* | |
804 | * Read out the rest of the packet. | |
805 | */ | |
806 | if (already < msg_len) | |
807 | { | |
808 | ssize_t nbyte; | |
809 | ||
810 | nbyte = stream_read_try (ibuf, zfpm_g->sock, msg_len - already); | |
811 | ||
812 | if (nbyte == 0 || nbyte == -1) | |
813 | { | |
814 | zfpm_connection_down ("failed to read message"); | |
815 | return 0; | |
816 | } | |
817 | ||
818 | if (nbyte != (ssize_t) (msg_len - already)) | |
819 | goto done; | |
820 | } | |
821 | ||
822 | zfpm_debug ("Read out a full fpm message"); | |
823 | ||
824 | /* | |
825 | * Just throw it away for now. | |
826 | */ | |
827 | stream_reset (ibuf); | |
828 | ||
829 | done: | |
830 | zfpm_read_on (); | |
831 | return 0; | |
832 | } | |
833 | ||
834 | /* | |
835 | * zfpm_writes_pending | |
836 | * | |
837 | * Returns TRUE if we may have something to write to the FPM. | |
838 | */ | |
839 | static int | |
840 | zfpm_writes_pending (void) | |
841 | { | |
842 | ||
843 | /* | |
844 | * Check if there is any data in the outbound buffer that has not | |
845 | * been written to the socket yet. | |
846 | */ | |
847 | if (stream_get_endp (zfpm_g->obuf) - stream_get_getp (zfpm_g->obuf)) | |
848 | return 1; | |
849 | ||
850 | /* | |
851 | * Check if there are any prefixes on the outbound queue. | |
852 | */ | |
853 | if (!TAILQ_EMPTY (&zfpm_g->dest_q)) | |
854 | return 1; | |
855 | ||
856 | return 0; | |
857 | } | |
858 | ||
859 | /* | |
860 | * zfpm_encode_route | |
861 | * | |
862 | * Encode a message to the FPM with information about the given route. | |
863 | * | |
864 | * Returns the number of bytes written to the buffer. 0 or a negative | |
865 | * value indicates an error. | |
866 | */ | |
867 | static inline int | |
868 | zfpm_encode_route (rib_dest_t *dest, struct rib *rib, char *in_buf, | |
fb0aa886 | 869 | size_t in_buf_len, fpm_msg_type_e *msg_type) |
5adc2528 | 870 | { |
fb0aa886 | 871 | size_t len; |
9bf75362 | 872 | #ifdef HAVE_NETLINK |
5adc2528 | 873 | int cmd; |
9bf75362 | 874 | #endif |
fb0aa886 | 875 | len = 0; |
5adc2528 | 876 | |
fb0aa886 | 877 | *msg_type = FPM_MSG_TYPE_NONE; |
5adc2528 | 878 | |
fb0aa886 | 879 | switch (zfpm_g->message_format) { |
5adc2528 | 880 | |
fb0aa886 AS |
881 | case ZFPM_MSG_FORMAT_PROTOBUF: |
882 | #ifdef HAVE_PROTOBUF | |
883 | len = zfpm_protobuf_encode_route (dest, rib, (uint8_t *) in_buf, | |
884 | in_buf_len); | |
885 | *msg_type = FPM_MSG_TYPE_PROTOBUF; | |
886 | #endif | |
887 | break; | |
5adc2528 | 888 | |
fb0aa886 AS |
889 | case ZFPM_MSG_FORMAT_NETLINK: |
890 | #ifdef HAVE_NETLINK | |
891 | *msg_type = FPM_MSG_TYPE_NETLINK; | |
892 | cmd = rib ? RTM_NEWROUTE : RTM_DELROUTE; | |
893 | len = zfpm_netlink_encode_route (cmd, dest, rib, in_buf, in_buf_len); | |
894 | assert(fpm_msg_align(len) == len); | |
895 | *msg_type = FPM_MSG_TYPE_NETLINK; | |
5adc2528 | 896 | #endif /* HAVE_NETLINK */ |
fb0aa886 AS |
897 | break; |
898 | ||
899 | default: | |
900 | break; | |
901 | } | |
902 | ||
903 | return len; | |
904 | ||
5adc2528 AS |
905 | } |
906 | ||
907 | /* | |
908 | * zfpm_route_for_update | |
909 | * | |
910 | * Returns the rib that is to be sent to the FPM for a given dest. | |
911 | */ | |
fb0aa886 | 912 | struct rib * |
5adc2528 AS |
913 | zfpm_route_for_update (rib_dest_t *dest) |
914 | { | |
915 | struct rib *rib; | |
916 | ||
917 | RIB_DEST_FOREACH_ROUTE (dest, rib) | |
918 | { | |
446bb95e | 919 | if (!CHECK_FLAG (rib->status, RIB_ENTRY_SELECTED_FIB)) |
5adc2528 AS |
920 | continue; |
921 | ||
922 | return rib; | |
923 | } | |
924 | ||
925 | /* | |
926 | * We have no route for this destination. | |
927 | */ | |
928 | return NULL; | |
929 | } | |
930 | ||
931 | /* | |
932 | * zfpm_build_updates | |
933 | * | |
934 | * Process the outgoing queue and write messages to the outbound | |
935 | * buffer. | |
936 | */ | |
937 | static void | |
938 | zfpm_build_updates (void) | |
939 | { | |
940 | struct stream *s; | |
941 | rib_dest_t *dest; | |
942 | unsigned char *buf, *data, *buf_end; | |
943 | size_t msg_len; | |
944 | size_t data_len; | |
945 | fpm_msg_hdr_t *hdr; | |
946 | struct rib *rib; | |
947 | int is_add, write_msg; | |
fb0aa886 | 948 | fpm_msg_type_e msg_type; |
5adc2528 AS |
949 | |
950 | s = zfpm_g->obuf; | |
951 | ||
952 | assert (stream_empty (s)); | |
953 | ||
954 | do { | |
955 | ||
956 | /* | |
957 | * Make sure there is enough space to write another message. | |
958 | */ | |
959 | if (STREAM_WRITEABLE (s) < FPM_MAX_MSG_LEN) | |
960 | break; | |
961 | ||
962 | buf = STREAM_DATA (s) + stream_get_endp (s); | |
963 | buf_end = buf + STREAM_WRITEABLE (s); | |
964 | ||
965 | dest = TAILQ_FIRST (&zfpm_g->dest_q); | |
966 | if (!dest) | |
967 | break; | |
968 | ||
969 | assert (CHECK_FLAG (dest->flags, RIB_DEST_UPDATE_FPM)); | |
970 | ||
971 | hdr = (fpm_msg_hdr_t *) buf; | |
972 | hdr->version = FPM_PROTO_VERSION; | |
5adc2528 AS |
973 | |
974 | data = fpm_msg_data (hdr); | |
975 | ||
976 | rib = zfpm_route_for_update (dest); | |
977 | is_add = rib ? 1 : 0; | |
978 | ||
979 | write_msg = 1; | |
980 | ||
981 | /* | |
982 | * If this is a route deletion, and we have not sent the route to | |
983 | * the FPM previously, skip it. | |
984 | */ | |
985 | if (!is_add && !CHECK_FLAG (dest->flags, RIB_DEST_SENT_TO_FPM)) | |
986 | { | |
987 | write_msg = 0; | |
988 | zfpm_g->stats.nop_deletes_skipped++; | |
989 | } | |
990 | ||
991 | if (write_msg) { | |
fb0aa886 AS |
992 | data_len = zfpm_encode_route (dest, rib, (char *) data, buf_end - data, |
993 | &msg_type); | |
5adc2528 AS |
994 | |
995 | assert (data_len); | |
996 | if (data_len) | |
997 | { | |
fb0aa886 | 998 | hdr->msg_type = msg_type; |
5adc2528 AS |
999 | msg_len = fpm_data_len_to_msg_len (data_len); |
1000 | hdr->msg_len = htons (msg_len); | |
1001 | stream_forward_endp (s, msg_len); | |
1002 | ||
1003 | if (is_add) | |
1004 | zfpm_g->stats.route_adds++; | |
1005 | else | |
1006 | zfpm_g->stats.route_dels++; | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | /* | |
1011 | * Remove the dest from the queue, and reset the flag. | |
1012 | */ | |
1013 | UNSET_FLAG (dest->flags, RIB_DEST_UPDATE_FPM); | |
1014 | TAILQ_REMOVE (&zfpm_g->dest_q, dest, fpm_q_entries); | |
1015 | ||
1016 | if (is_add) | |
1017 | { | |
1018 | SET_FLAG (dest->flags, RIB_DEST_SENT_TO_FPM); | |
1019 | } | |
1020 | else | |
1021 | { | |
1022 | UNSET_FLAG (dest->flags, RIB_DEST_SENT_TO_FPM); | |
1023 | } | |
1024 | ||
1025 | /* | |
1026 | * Delete the destination if necessary. | |
1027 | */ | |
1028 | if (rib_gc_dest (dest->rnode)) | |
1029 | zfpm_g->stats.dests_del_after_update++; | |
1030 | ||
1031 | } while (1); | |
1032 | ||
1033 | } | |
1034 | ||
1035 | /* | |
1036 | * zfpm_write_cb | |
1037 | */ | |
1038 | static int | |
1039 | zfpm_write_cb (struct thread *thread) | |
1040 | { | |
1041 | struct stream *s; | |
1042 | int num_writes; | |
1043 | ||
1044 | zfpm_g->stats.write_cb_calls++; | |
1045 | assert (zfpm_g->t_write); | |
1046 | zfpm_g->t_write = NULL; | |
1047 | ||
1048 | /* | |
1049 | * Check if async connect is now done. | |
1050 | */ | |
1051 | if (zfpm_g->state == ZFPM_STATE_CONNECTING) | |
1052 | { | |
1053 | zfpm_connect_check (); | |
1054 | return 0; | |
1055 | } | |
1056 | ||
1057 | assert (zfpm_g->state == ZFPM_STATE_ESTABLISHED); | |
1058 | assert (zfpm_g->sock >= 0); | |
1059 | ||
1060 | num_writes = 0; | |
1061 | ||
1062 | do | |
1063 | { | |
1064 | int bytes_to_write, bytes_written; | |
1065 | ||
1066 | s = zfpm_g->obuf; | |
1067 | ||
1068 | /* | |
1069 | * If the stream is empty, try fill it up with data. | |
1070 | */ | |
1071 | if (stream_empty (s)) | |
1072 | { | |
1073 | zfpm_build_updates (); | |
1074 | } | |
1075 | ||
1076 | bytes_to_write = stream_get_endp (s) - stream_get_getp (s); | |
1077 | if (!bytes_to_write) | |
1078 | break; | |
1079 | ||
1080 | bytes_written = write (zfpm_g->sock, STREAM_PNT (s), bytes_to_write); | |
1081 | zfpm_g->stats.write_calls++; | |
1082 | num_writes++; | |
1083 | ||
1084 | if (bytes_written < 0) | |
1085 | { | |
1086 | if (ERRNO_IO_RETRY (errno)) | |
1087 | break; | |
1088 | ||
1089 | zfpm_connection_down ("failed to write to socket"); | |
1090 | return 0; | |
1091 | } | |
1092 | ||
1093 | if (bytes_written != bytes_to_write) | |
1094 | { | |
1095 | ||
1096 | /* | |
1097 | * Partial write. | |
1098 | */ | |
1099 | stream_forward_getp (s, bytes_written); | |
1100 | zfpm_g->stats.partial_writes++; | |
1101 | break; | |
1102 | } | |
1103 | ||
1104 | /* | |
1105 | * We've written out the entire contents of the stream. | |
1106 | */ | |
1107 | stream_reset (s); | |
1108 | ||
1109 | if (num_writes >= ZFPM_MAX_WRITES_PER_RUN) | |
1110 | { | |
1111 | zfpm_g->stats.max_writes_hit++; | |
1112 | break; | |
1113 | } | |
1114 | ||
1115 | if (zfpm_thread_should_yield (thread)) | |
1116 | { | |
1117 | zfpm_g->stats.t_write_yields++; | |
1118 | break; | |
1119 | } | |
1120 | } while (1); | |
1121 | ||
1122 | if (zfpm_writes_pending ()) | |
1123 | zfpm_write_on (); | |
1124 | ||
1125 | return 0; | |
1126 | } | |
1127 | ||
1128 | /* | |
1129 | * zfpm_connect_cb | |
1130 | */ | |
1131 | static int | |
1132 | zfpm_connect_cb (struct thread *t) | |
1133 | { | |
1134 | int sock, ret; | |
1135 | struct sockaddr_in serv; | |
1136 | ||
1137 | assert (zfpm_g->t_connect); | |
1138 | zfpm_g->t_connect = NULL; | |
1139 | assert (zfpm_g->state == ZFPM_STATE_ACTIVE); | |
1140 | ||
1141 | sock = socket (AF_INET, SOCK_STREAM, 0); | |
1142 | if (sock < 0) | |
1143 | { | |
1144 | zfpm_debug ("Failed to create socket for connect(): %s", strerror(errno)); | |
1145 | zfpm_g->stats.connect_no_sock++; | |
1146 | return 0; | |
1147 | } | |
1148 | ||
1149 | set_nonblocking(sock); | |
1150 | ||
1151 | /* Make server socket. */ | |
1152 | memset (&serv, 0, sizeof (serv)); | |
1153 | serv.sin_family = AF_INET; | |
1154 | serv.sin_port = htons (zfpm_g->fpm_port); | |
1155 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN | |
1156 | serv.sin_len = sizeof (struct sockaddr_in); | |
1157 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ | |
711ff0ba USK |
1158 | if (!zfpm_g->fpm_server) |
1159 | serv.sin_addr.s_addr = htonl (INADDR_LOOPBACK); | |
1160 | else | |
1161 | serv.sin_addr.s_addr = (zfpm_g->fpm_server); | |
5adc2528 AS |
1162 | |
1163 | /* | |
1164 | * Connect to the FPM. | |
1165 | */ | |
1166 | zfpm_g->connect_calls++; | |
1167 | zfpm_g->stats.connect_calls++; | |
cf672a86 | 1168 | zfpm_g->last_connect_call_time = monotime(NULL); |
5adc2528 AS |
1169 | |
1170 | ret = connect (sock, (struct sockaddr *) &serv, sizeof (serv)); | |
1171 | if (ret >= 0) | |
1172 | { | |
1173 | zfpm_g->sock = sock; | |
1174 | zfpm_connection_up ("connect succeeded"); | |
1175 | return 1; | |
1176 | } | |
1177 | ||
1178 | if (errno == EINPROGRESS) | |
1179 | { | |
1180 | zfpm_g->sock = sock; | |
1181 | zfpm_read_on (); | |
1182 | zfpm_write_on (); | |
1183 | zfpm_set_state (ZFPM_STATE_CONNECTING, "async connect in progress"); | |
1184 | return 0; | |
1185 | } | |
1186 | ||
1187 | zlog_info ("can't connect to FPM %d: %s", sock, safe_strerror (errno)); | |
1188 | close (sock); | |
1189 | ||
1190 | /* | |
1191 | * Restart timer for retrying connection. | |
1192 | */ | |
1193 | zfpm_start_connect_timer ("connect() failed"); | |
1194 | return 0; | |
1195 | } | |
1196 | ||
1197 | /* | |
1198 | * zfpm_set_state | |
1199 | * | |
1200 | * Move state machine into the given state. | |
1201 | */ | |
1202 | static void | |
1203 | zfpm_set_state (zfpm_state_t state, const char *reason) | |
1204 | { | |
1205 | zfpm_state_t cur_state = zfpm_g->state; | |
1206 | ||
1207 | if (!reason) | |
1208 | reason = "Unknown"; | |
1209 | ||
1210 | if (state == cur_state) | |
1211 | return; | |
1212 | ||
1213 | zfpm_debug("beginning state transition %s -> %s. Reason: %s", | |
1214 | zfpm_state_to_str (cur_state), zfpm_state_to_str (state), | |
1215 | reason); | |
1216 | ||
1217 | switch (state) { | |
1218 | ||
1219 | case ZFPM_STATE_IDLE: | |
1220 | assert (cur_state == ZFPM_STATE_ESTABLISHED); | |
1221 | break; | |
1222 | ||
1223 | case ZFPM_STATE_ACTIVE: | |
1224 | assert (cur_state == ZFPM_STATE_IDLE || | |
1225 | cur_state == ZFPM_STATE_CONNECTING); | |
1226 | assert (zfpm_g->t_connect); | |
1227 | break; | |
1228 | ||
1229 | case ZFPM_STATE_CONNECTING: | |
1230 | assert (zfpm_g->sock); | |
1231 | assert (cur_state == ZFPM_STATE_ACTIVE); | |
1232 | assert (zfpm_g->t_read); | |
1233 | assert (zfpm_g->t_write); | |
1234 | break; | |
1235 | ||
1236 | case ZFPM_STATE_ESTABLISHED: | |
1237 | assert (cur_state == ZFPM_STATE_ACTIVE || | |
1238 | cur_state == ZFPM_STATE_CONNECTING); | |
1239 | assert (zfpm_g->sock); | |
1240 | assert (zfpm_g->t_read); | |
1241 | assert (zfpm_g->t_write); | |
1242 | break; | |
1243 | } | |
1244 | ||
1245 | zfpm_g->state = state; | |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | * zfpm_calc_connect_delay | |
1250 | * | |
1251 | * Returns the number of seconds after which we should attempt to | |
1252 | * reconnect to the FPM. | |
1253 | */ | |
1254 | static long | |
1255 | zfpm_calc_connect_delay (void) | |
1256 | { | |
1257 | time_t elapsed; | |
1258 | ||
1259 | /* | |
1260 | * Return 0 if this is our first attempt to connect. | |
1261 | */ | |
1262 | if (zfpm_g->connect_calls == 0) | |
1263 | { | |
1264 | return 0; | |
1265 | } | |
1266 | ||
1267 | elapsed = zfpm_get_elapsed_time (zfpm_g->last_connect_call_time); | |
1268 | ||
1269 | if (elapsed > ZFPM_CONNECT_RETRY_IVL) { | |
1270 | return 0; | |
1271 | } | |
1272 | ||
1273 | return ZFPM_CONNECT_RETRY_IVL - elapsed; | |
1274 | } | |
1275 | ||
1276 | /* | |
1277 | * zfpm_start_connect_timer | |
1278 | */ | |
1279 | static void | |
1280 | zfpm_start_connect_timer (const char *reason) | |
1281 | { | |
1282 | long delay_secs; | |
1283 | ||
1284 | assert (!zfpm_g->t_connect); | |
1285 | assert (zfpm_g->sock < 0); | |
1286 | ||
1287 | assert(zfpm_g->state == ZFPM_STATE_IDLE || | |
1288 | zfpm_g->state == ZFPM_STATE_ACTIVE || | |
1289 | zfpm_g->state == ZFPM_STATE_CONNECTING); | |
1290 | ||
1291 | delay_secs = zfpm_calc_connect_delay(); | |
1292 | zfpm_debug ("scheduling connect in %ld seconds", delay_secs); | |
1293 | ||
1294 | THREAD_TIMER_ON (zfpm_g->master, zfpm_g->t_connect, zfpm_connect_cb, 0, | |
1295 | delay_secs); | |
1296 | zfpm_set_state (ZFPM_STATE_ACTIVE, reason); | |
1297 | } | |
1298 | ||
5697001a | 1299 | #if defined (HAVE_FPM) |
5adc2528 AS |
1300 | /* |
1301 | * zfpm_is_enabled | |
1302 | * | |
1303 | * Returns TRUE if the zebra FPM module has been enabled. | |
1304 | */ | |
1305 | static inline int | |
1306 | zfpm_is_enabled (void) | |
1307 | { | |
1308 | return zfpm_g->enabled; | |
1309 | } | |
5697001a | 1310 | #endif |
5adc2528 AS |
1311 | |
1312 | /* | |
1313 | * zfpm_conn_is_up | |
1314 | * | |
1315 | * Returns TRUE if the connection to the FPM is up. | |
1316 | */ | |
1317 | static inline int | |
1318 | zfpm_conn_is_up (void) | |
1319 | { | |
1320 | if (zfpm_g->state != ZFPM_STATE_ESTABLISHED) | |
1321 | return 0; | |
1322 | ||
1323 | assert (zfpm_g->sock >= 0); | |
1324 | ||
1325 | return 1; | |
1326 | } | |
1327 | ||
1328 | /* | |
1329 | * zfpm_trigger_update | |
1330 | * | |
1331 | * The zebra code invokes this function to indicate that we should | |
1332 | * send an update to the FPM about the given route_node. | |
1333 | */ | |
1334 | void | |
1335 | zfpm_trigger_update (struct route_node *rn, const char *reason) | |
1336 | { | |
1337 | rib_dest_t *dest; | |
35d921cc | 1338 | char buf[PREFIX_STRLEN]; |
5adc2528 AS |
1339 | |
1340 | /* | |
1341 | * Ignore if the connection is down. We will update the FPM about | |
1342 | * all destinations once the connection comes up. | |
1343 | */ | |
1344 | if (!zfpm_conn_is_up ()) | |
1345 | return; | |
1346 | ||
1347 | dest = rib_dest_from_rnode (rn); | |
1348 | ||
1349 | /* | |
1350 | * Ignore the trigger if the dest is not in a table that we would | |
1351 | * send to the FPM. | |
1352 | */ | |
1353 | if (!zfpm_is_table_for_fpm (rib_dest_table (dest))) | |
1354 | { | |
1355 | zfpm_g->stats.non_fpm_table_triggers++; | |
1356 | return; | |
1357 | } | |
1358 | ||
1359 | if (CHECK_FLAG (dest->flags, RIB_DEST_UPDATE_FPM)) { | |
1360 | zfpm_g->stats.redundant_triggers++; | |
1361 | return; | |
1362 | } | |
1363 | ||
1364 | if (reason) | |
1365 | { | |
35d921cc TT |
1366 | zfpm_debug ("%s triggering update to FPM - Reason: %s", |
1367 | prefix2str (&rn->p, buf, sizeof(buf)), reason); | |
5adc2528 AS |
1368 | } |
1369 | ||
1370 | SET_FLAG (dest->flags, RIB_DEST_UPDATE_FPM); | |
1371 | TAILQ_INSERT_TAIL (&zfpm_g->dest_q, dest, fpm_q_entries); | |
1372 | zfpm_g->stats.updates_triggered++; | |
1373 | ||
1374 | /* | |
1375 | * Make sure that writes are enabled. | |
1376 | */ | |
1377 | if (zfpm_g->t_write) | |
1378 | return; | |
1379 | ||
1380 | zfpm_write_on (); | |
1381 | } | |
1382 | ||
1383 | /* | |
1384 | * zfpm_stats_timer_cb | |
1385 | */ | |
1386 | static int | |
1387 | zfpm_stats_timer_cb (struct thread *t) | |
1388 | { | |
1389 | assert (zfpm_g->t_stats); | |
1390 | zfpm_g->t_stats = NULL; | |
1391 | ||
1392 | /* | |
1393 | * Remember the stats collected in the last interval for display | |
1394 | * purposes. | |
1395 | */ | |
1396 | zfpm_stats_copy (&zfpm_g->stats, &zfpm_g->last_ivl_stats); | |
1397 | ||
1398 | /* | |
1399 | * Add the current set of stats into the cumulative statistics. | |
1400 | */ | |
1401 | zfpm_stats_compose (&zfpm_g->cumulative_stats, &zfpm_g->stats, | |
1402 | &zfpm_g->cumulative_stats); | |
1403 | ||
1404 | /* | |
1405 | * Start collecting stats afresh over the next interval. | |
1406 | */ | |
1407 | zfpm_stats_reset (&zfpm_g->stats); | |
1408 | ||
1409 | zfpm_start_stats_timer (); | |
1410 | ||
1411 | return 0; | |
1412 | } | |
1413 | ||
5697001a | 1414 | #if defined (HAVE_FPM) |
5adc2528 AS |
1415 | /* |
1416 | * zfpm_stop_stats_timer | |
1417 | */ | |
1418 | static void | |
1419 | zfpm_stop_stats_timer (void) | |
1420 | { | |
1421 | if (!zfpm_g->t_stats) | |
1422 | return; | |
1423 | ||
1424 | zfpm_debug ("Stopping existing stats timer"); | |
1425 | THREAD_TIMER_OFF (zfpm_g->t_stats); | |
1426 | } | |
5697001a | 1427 | #endif |
5adc2528 AS |
1428 | |
1429 | /* | |
1430 | * zfpm_start_stats_timer | |
1431 | */ | |
1432 | void | |
1433 | zfpm_start_stats_timer (void) | |
1434 | { | |
1435 | assert (!zfpm_g->t_stats); | |
1436 | ||
1437 | THREAD_TIMER_ON (zfpm_g->master, zfpm_g->t_stats, zfpm_stats_timer_cb, 0, | |
1438 | ZFPM_STATS_IVL_SECS); | |
1439 | } | |
1440 | ||
1441 | /* | |
1442 | * Helper macro for zfpm_show_stats() below. | |
1443 | */ | |
1444 | #define ZFPM_SHOW_STAT(counter) \ | |
1445 | do { \ | |
1446 | vty_out (vty, "%-40s %10lu %16lu%s", #counter, total_stats.counter, \ | |
1447 | zfpm_g->last_ivl_stats.counter, VTY_NEWLINE); \ | |
1448 | } while (0) | |
1449 | ||
5697001a | 1450 | #if defined (HAVE_FPM) |
5adc2528 AS |
1451 | /* |
1452 | * zfpm_show_stats | |
1453 | */ | |
1454 | static void | |
1455 | zfpm_show_stats (struct vty *vty) | |
1456 | { | |
1457 | zfpm_stats_t total_stats; | |
1458 | time_t elapsed; | |
1459 | ||
1460 | vty_out (vty, "%s%-40s %10s Last %2d secs%s%s", VTY_NEWLINE, "Counter", | |
1461 | "Total", ZFPM_STATS_IVL_SECS, VTY_NEWLINE, VTY_NEWLINE); | |
1462 | ||
1463 | /* | |
1464 | * Compute the total stats up to this instant. | |
1465 | */ | |
1466 | zfpm_stats_compose (&zfpm_g->cumulative_stats, &zfpm_g->stats, | |
1467 | &total_stats); | |
1468 | ||
1469 | ZFPM_SHOW_STAT (connect_calls); | |
1470 | ZFPM_SHOW_STAT (connect_no_sock); | |
1471 | ZFPM_SHOW_STAT (read_cb_calls); | |
1472 | ZFPM_SHOW_STAT (write_cb_calls); | |
1473 | ZFPM_SHOW_STAT (write_calls); | |
1474 | ZFPM_SHOW_STAT (partial_writes); | |
1475 | ZFPM_SHOW_STAT (max_writes_hit); | |
1476 | ZFPM_SHOW_STAT (t_write_yields); | |
1477 | ZFPM_SHOW_STAT (nop_deletes_skipped); | |
1478 | ZFPM_SHOW_STAT (route_adds); | |
1479 | ZFPM_SHOW_STAT (route_dels); | |
1480 | ZFPM_SHOW_STAT (updates_triggered); | |
1481 | ZFPM_SHOW_STAT (non_fpm_table_triggers); | |
1482 | ZFPM_SHOW_STAT (redundant_triggers); | |
1483 | ZFPM_SHOW_STAT (dests_del_after_update); | |
1484 | ZFPM_SHOW_STAT (t_conn_down_starts); | |
1485 | ZFPM_SHOW_STAT (t_conn_down_dests_processed); | |
1486 | ZFPM_SHOW_STAT (t_conn_down_yields); | |
1487 | ZFPM_SHOW_STAT (t_conn_down_finishes); | |
1488 | ZFPM_SHOW_STAT (t_conn_up_starts); | |
1489 | ZFPM_SHOW_STAT (t_conn_up_dests_processed); | |
1490 | ZFPM_SHOW_STAT (t_conn_up_yields); | |
1491 | ZFPM_SHOW_STAT (t_conn_up_aborts); | |
1492 | ZFPM_SHOW_STAT (t_conn_up_finishes); | |
1493 | ||
1494 | if (!zfpm_g->last_stats_clear_time) | |
1495 | return; | |
1496 | ||
1497 | elapsed = zfpm_get_elapsed_time (zfpm_g->last_stats_clear_time); | |
1498 | ||
1499 | vty_out (vty, "%sStats were cleared %lu seconds ago%s", VTY_NEWLINE, | |
1500 | (unsigned long) elapsed, VTY_NEWLINE); | |
1501 | } | |
1502 | ||
1503 | /* | |
1504 | * zfpm_clear_stats | |
1505 | */ | |
1506 | static void | |
1507 | zfpm_clear_stats (struct vty *vty) | |
1508 | { | |
1509 | if (!zfpm_is_enabled ()) | |
1510 | { | |
1511 | vty_out (vty, "The FPM module is not enabled...%s", VTY_NEWLINE); | |
1512 | return; | |
1513 | } | |
1514 | ||
1515 | zfpm_stats_reset (&zfpm_g->stats); | |
1516 | zfpm_stats_reset (&zfpm_g->last_ivl_stats); | |
1517 | zfpm_stats_reset (&zfpm_g->cumulative_stats); | |
1518 | ||
1519 | zfpm_stop_stats_timer (); | |
1520 | zfpm_start_stats_timer (); | |
1521 | ||
cf672a86 | 1522 | zfpm_g->last_stats_clear_time = monotime(NULL); |
5adc2528 AS |
1523 | |
1524 | vty_out (vty, "Cleared FPM stats%s", VTY_NEWLINE); | |
1525 | } | |
1526 | ||
1527 | /* | |
1528 | * show_zebra_fpm_stats | |
1529 | */ | |
1530 | DEFUN (show_zebra_fpm_stats, | |
1531 | show_zebra_fpm_stats_cmd, | |
1532 | "show zebra fpm stats", | |
1533 | SHOW_STR | |
1534 | "Zebra information\n" | |
1535 | "Forwarding Path Manager information\n" | |
1536 | "Statistics\n") | |
1537 | { | |
1538 | zfpm_show_stats (vty); | |
1539 | return CMD_SUCCESS; | |
1540 | } | |
1541 | ||
1542 | /* | |
1543 | * clear_zebra_fpm_stats | |
1544 | */ | |
1545 | DEFUN (clear_zebra_fpm_stats, | |
1546 | clear_zebra_fpm_stats_cmd, | |
1547 | "clear zebra fpm stats", | |
1548 | CLEAR_STR | |
1549 | "Zebra information\n" | |
1550 | "Clear Forwarding Path Manager information\n" | |
1551 | "Statistics\n") | |
1552 | { | |
1553 | zfpm_clear_stats (vty); | |
1554 | return CMD_SUCCESS; | |
1555 | } | |
1556 | ||
711ff0ba USK |
1557 | /* |
1558 | * update fpm connection information | |
1559 | */ | |
e52702f2 QY |
1560 | DEFUN ( fpm_remote_ip, |
1561 | fpm_remote_ip_cmd, | |
1562 | "fpm connection ip A.B.C.D port (1-65535)", | |
711ff0ba USK |
1563 | "fpm connection remote ip and port\n" |
1564 | "Remote fpm server ip A.B.C.D\n" | |
1565 | "Enter ip ") | |
1566 | { | |
1567 | ||
1568 | in_addr_t fpm_server; | |
1569 | uint32_t port_no; | |
1570 | ||
e52702f2 | 1571 | fpm_server = inet_addr (argv[3]->arg); |
711ff0ba USK |
1572 | if (fpm_server == INADDR_NONE) |
1573 | return CMD_ERR_INCOMPLETE; | |
1574 | ||
e52702f2 | 1575 | port_no = atoi (argv[5]->arg); |
711ff0ba USK |
1576 | if (port_no < TCP_MIN_PORT || port_no > TCP_MAX_PORT) |
1577 | return CMD_ERR_INCOMPLETE; | |
1578 | ||
1579 | zfpm_g->fpm_server = fpm_server; | |
1580 | zfpm_g->fpm_port = port_no; | |
1581 | ||
1582 | ||
1583 | return CMD_SUCCESS; | |
1584 | } | |
1585 | ||
e52702f2 QY |
1586 | DEFUN ( no_fpm_remote_ip, |
1587 | no_fpm_remote_ip_cmd, | |
1588 | "no fpm connection ip A.B.C.D port (1-65535)", | |
711ff0ba USK |
1589 | "fpm connection remote ip and port\n" |
1590 | "Connection\n" | |
1591 | "Remote fpm server ip A.B.C.D\n" | |
1592 | "Enter ip ") | |
1593 | { | |
e52702f2 QY |
1594 | if (zfpm_g->fpm_server != inet_addr (argv[4]->arg) || |
1595 | zfpm_g->fpm_port != atoi (argv[6]->arg)) | |
711ff0ba USK |
1596 | return CMD_ERR_NO_MATCH; |
1597 | ||
1598 | zfpm_g->fpm_server = FPM_DEFAULT_IP; | |
1599 | zfpm_g->fpm_port = FPM_DEFAULT_PORT; | |
1600 | ||
1601 | return CMD_SUCCESS; | |
1602 | } | |
5697001a | 1603 | #endif |
711ff0ba | 1604 | |
fb0aa886 AS |
1605 | /* |
1606 | * zfpm_init_message_format | |
1607 | */ | |
1608 | static inline void | |
1609 | zfpm_init_message_format (const char *format) | |
1610 | { | |
1611 | int have_netlink, have_protobuf; | |
1612 | ||
fb0aa886 AS |
1613 | #ifdef HAVE_NETLINK |
1614 | have_netlink = 1; | |
4b2792b5 DS |
1615 | #else |
1616 | have_netlink = 0; | |
fb0aa886 AS |
1617 | #endif |
1618 | ||
1619 | #ifdef HAVE_PROTOBUF | |
1620 | have_protobuf = 1; | |
4b2792b5 DS |
1621 | #else |
1622 | have_protobuf = 0; | |
fb0aa886 AS |
1623 | #endif |
1624 | ||
1625 | zfpm_g->message_format = ZFPM_MSG_FORMAT_NONE; | |
1626 | ||
1627 | if (!format) | |
1628 | { | |
1629 | if (have_netlink) | |
1630 | { | |
1631 | zfpm_g->message_format = ZFPM_MSG_FORMAT_NETLINK; | |
1632 | } | |
1633 | else if (have_protobuf) | |
1634 | { | |
1635 | zfpm_g->message_format = ZFPM_MSG_FORMAT_PROTOBUF; | |
1636 | } | |
1637 | return; | |
1638 | } | |
1639 | ||
1640 | if (!strcmp ("netlink", format)) | |
1641 | { | |
1642 | if (!have_netlink) | |
1643 | { | |
1644 | zlog_err ("FPM netlink message format is not available"); | |
1645 | return; | |
1646 | } | |
1647 | zfpm_g->message_format = ZFPM_MSG_FORMAT_NETLINK; | |
1648 | return; | |
1649 | } | |
1650 | ||
1651 | if (!strcmp ("protobuf", format)) | |
1652 | { | |
1653 | if (!have_protobuf) | |
1654 | { | |
1655 | zlog_err ("FPM protobuf message format is not available"); | |
1656 | return; | |
1657 | } | |
1658 | zfpm_g->message_format = ZFPM_MSG_FORMAT_PROTOBUF; | |
1659 | return; | |
1660 | } | |
1661 | ||
1662 | zlog_warn ("Unknown fpm format '%s'", format); | |
1663 | } | |
1664 | ||
711ff0ba USK |
1665 | /** |
1666 | * fpm_remote_srv_write | |
1667 | * | |
1668 | * Module to write remote fpm connection | |
1669 | * | |
1670 | * Returns ZERO on success. | |
1671 | */ | |
1672 | ||
1673 | int fpm_remote_srv_write (struct vty *vty ) | |
1674 | { | |
1675 | struct in_addr in; | |
1676 | ||
1677 | in.s_addr = zfpm_g->fpm_server; | |
1678 | ||
1679 | if (zfpm_g->fpm_server != FPM_DEFAULT_IP || | |
1680 | zfpm_g->fpm_port != FPM_DEFAULT_PORT) | |
1681 | vty_out (vty,"fpm connection ip %s port %d%s", inet_ntoa (in),zfpm_g->fpm_port,VTY_NEWLINE); | |
1682 | ||
1683 | return 0; | |
1684 | } | |
1685 | ||
1686 | ||
5adc2528 AS |
1687 | /** |
1688 | * zfpm_init | |
1689 | * | |
1690 | * One-time initialization of the Zebra FPM module. | |
1691 | * | |
1692 | * @param[in] port port at which FPM is running. | |
1693 | * @param[in] enable TRUE if the zebra FPM module should be enabled | |
fb0aa886 | 1694 | * @param[in] format to use to talk to the FPM. Can be 'netink' or 'protobuf'. |
5adc2528 AS |
1695 | * |
1696 | * Returns TRUE on success. | |
1697 | */ | |
1698 | int | |
fb0aa886 AS |
1699 | zfpm_init (struct thread_master *master, int enable, uint16_t port, |
1700 | const char *format) | |
5adc2528 AS |
1701 | { |
1702 | static int initialized = 0; | |
1703 | ||
1704 | if (initialized) { | |
1705 | return 1; | |
1706 | } | |
1707 | ||
1708 | initialized = 1; | |
1709 | ||
1710 | memset (zfpm_g, 0, sizeof (*zfpm_g)); | |
1711 | zfpm_g->master = master; | |
1712 | TAILQ_INIT(&zfpm_g->dest_q); | |
1713 | zfpm_g->sock = -1; | |
1714 | zfpm_g->state = ZFPM_STATE_IDLE; | |
1715 | ||
5adc2528 AS |
1716 | zfpm_stats_init (&zfpm_g->stats); |
1717 | zfpm_stats_init (&zfpm_g->last_ivl_stats); | |
1718 | zfpm_stats_init (&zfpm_g->cumulative_stats); | |
1719 | ||
5697001a | 1720 | #if defined (HAVE_FPM) |
5adc2528 AS |
1721 | install_element (ENABLE_NODE, &show_zebra_fpm_stats_cmd); |
1722 | install_element (ENABLE_NODE, &clear_zebra_fpm_stats_cmd); | |
711ff0ba USK |
1723 | install_element (CONFIG_NODE, &fpm_remote_ip_cmd); |
1724 | install_element (CONFIG_NODE, &no_fpm_remote_ip_cmd); | |
5697001a | 1725 | #endif |
5adc2528 | 1726 | |
fb0aa886 AS |
1727 | zfpm_init_message_format(format); |
1728 | ||
1729 | /* | |
1730 | * Disable FPM interface if no suitable format is available. | |
1731 | */ | |
1732 | if (zfpm_g->message_format == ZFPM_MSG_FORMAT_NONE) | |
1733 | enable = 0; | |
1734 | ||
1735 | zfpm_g->enabled = enable; | |
5adc2528 AS |
1736 | |
1737 | if (!enable) { | |
1738 | return 1; | |
1739 | } | |
1740 | ||
711ff0ba USK |
1741 | if (!zfpm_g->fpm_server) |
1742 | zfpm_g->fpm_server = FPM_DEFAULT_IP; | |
1743 | ||
5adc2528 AS |
1744 | if (!port) |
1745 | port = FPM_DEFAULT_PORT; | |
1746 | ||
1747 | zfpm_g->fpm_port = port; | |
1748 | ||
1749 | zfpm_g->obuf = stream_new (ZFPM_OBUF_SIZE); | |
1750 | zfpm_g->ibuf = stream_new (ZFPM_IBUF_SIZE); | |
1751 | ||
1752 | zfpm_start_stats_timer (); | |
1753 | zfpm_start_connect_timer ("initialized"); | |
1754 | ||
1755 | return 1; | |
1756 | } |