Commit | Line | Data |
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00e2e675 DG |
1 | /* |
2 | * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <assert.h> | |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <sys/stat.h> | |
24 | #include <sys/types.h> | |
25 | #include <unistd.h> | |
d88aee68 | 26 | #include <inttypes.h> |
00e2e675 DG |
27 | |
28 | #include <common/common.h> | |
29 | #include <common/defaults.h> | |
30 | #include <common/uri.h> | |
31 | ||
32 | #include "consumer.h" | |
33 | ||
f50f23d9 DG |
34 | /* |
35 | * Receive a reply command status message from the consumer. Consumer socket | |
36 | * lock MUST be acquired before calling this function. | |
37 | * | |
38 | * Return 0 on success, -1 on recv error or a negative lttng error code which | |
39 | * was possibly returned by the consumer. | |
40 | */ | |
41 | int consumer_recv_status_reply(struct consumer_socket *sock) | |
42 | { | |
43 | int ret; | |
44 | struct lttcomm_consumer_status_msg reply; | |
45 | ||
46 | assert(sock); | |
47 | ||
48 | ret = lttcomm_recv_unix_sock(sock->fd, &reply, sizeof(reply)); | |
a6cd2b97 DG |
49 | if (ret <= 0) { |
50 | if (ret == 0) { | |
51 | /* Orderly shutdown. Don't return 0 which means success. */ | |
52 | ret = -1; | |
53 | } | |
3448e266 DG |
54 | /* The above call will print a PERROR on error. */ |
55 | DBG("Fail to receive status reply on sock %d", sock->fd); | |
f50f23d9 DG |
56 | goto end; |
57 | } | |
58 | ||
59 | if (reply.ret_code == LTTNG_OK) { | |
60 | /* All good. */ | |
61 | ret = 0; | |
62 | } else { | |
63 | ret = -reply.ret_code; | |
ffe60014 | 64 | DBG("Consumer ret code %d", ret); |
f50f23d9 DG |
65 | } |
66 | ||
67 | end: | |
68 | return ret; | |
69 | } | |
70 | ||
ffe60014 DG |
71 | /* |
72 | * Once the ASK_CHANNEL command is sent to the consumer, the channel | |
73 | * information are sent back. This call receives that data and populates key | |
74 | * and stream_count. | |
75 | * | |
76 | * On success return 0 and both key and stream_count are set. On error, a | |
77 | * negative value is sent back and both parameters are untouched. | |
78 | */ | |
79 | int consumer_recv_status_channel(struct consumer_socket *sock, | |
d88aee68 | 80 | uint64_t *key, unsigned int *stream_count) |
ffe60014 DG |
81 | { |
82 | int ret; | |
83 | struct lttcomm_consumer_status_channel reply; | |
84 | ||
85 | assert(sock); | |
86 | assert(stream_count); | |
87 | assert(key); | |
88 | ||
89 | ret = lttcomm_recv_unix_sock(sock->fd, &reply, sizeof(reply)); | |
90 | if (ret <= 0) { | |
91 | if (ret == 0) { | |
92 | /* Orderly shutdown. Don't return 0 which means success. */ | |
93 | ret = -1; | |
94 | } | |
95 | /* The above call will print a PERROR on error. */ | |
96 | DBG("Fail to receive status reply on sock %d", sock->fd); | |
97 | goto end; | |
98 | } | |
99 | ||
100 | /* An error is possible so don't touch the key and stream_count. */ | |
101 | if (reply.ret_code != LTTNG_OK) { | |
102 | ret = -1; | |
103 | goto end; | |
104 | } | |
105 | ||
106 | *key = reply.key; | |
107 | *stream_count = reply.stream_count; | |
108 | ||
109 | end: | |
110 | return ret; | |
111 | } | |
112 | ||
2f77fc4b DG |
113 | /* |
114 | * Send destroy relayd command to consumer. | |
115 | * | |
116 | * On success return positive value. On error, negative value. | |
117 | */ | |
118 | int consumer_send_destroy_relayd(struct consumer_socket *sock, | |
119 | struct consumer_output *consumer) | |
120 | { | |
121 | int ret; | |
122 | struct lttcomm_consumer_msg msg; | |
123 | ||
124 | assert(consumer); | |
125 | assert(sock); | |
126 | ||
ffe60014 | 127 | DBG2("Sending destroy relayd command to consumer sock %d", sock->fd); |
2f77fc4b DG |
128 | |
129 | /* Bail out if consumer is disabled */ | |
130 | if (!consumer->enabled) { | |
f73fabfd | 131 | ret = LTTNG_OK; |
2f77fc4b DG |
132 | DBG3("Consumer is disabled"); |
133 | goto error; | |
134 | } | |
135 | ||
136 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_RELAYD; | |
137 | msg.u.destroy_relayd.net_seq_idx = consumer->net_seq_index; | |
138 | ||
139 | pthread_mutex_lock(sock->lock); | |
140 | ret = lttcomm_send_unix_sock(sock->fd, &msg, sizeof(msg)); | |
2f77fc4b | 141 | if (ret < 0) { |
c5c45efa DG |
142 | /* Indicate that the consumer is probably closing at this point. */ |
143 | DBG("send consumer destroy relayd command"); | |
f50f23d9 | 144 | goto error_send; |
2f77fc4b DG |
145 | } |
146 | ||
f50f23d9 DG |
147 | /* Don't check the return value. The caller will do it. */ |
148 | ret = consumer_recv_status_reply(sock); | |
149 | ||
2f77fc4b DG |
150 | DBG2("Consumer send destroy relayd command done"); |
151 | ||
f50f23d9 DG |
152 | error_send: |
153 | pthread_mutex_unlock(sock->lock); | |
2f77fc4b DG |
154 | error: |
155 | return ret; | |
156 | } | |
157 | ||
158 | /* | |
159 | * For each consumer socket in the consumer output object, send a destroy | |
160 | * relayd command. | |
161 | */ | |
162 | void consumer_output_send_destroy_relayd(struct consumer_output *consumer) | |
163 | { | |
2f77fc4b DG |
164 | struct lttng_ht_iter iter; |
165 | struct consumer_socket *socket; | |
166 | ||
167 | assert(consumer); | |
168 | ||
169 | /* Destroy any relayd connection */ | |
170 | if (consumer && consumer->type == CONSUMER_DST_NET) { | |
171 | rcu_read_lock(); | |
172 | cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket, | |
173 | node.node) { | |
c617c0c6 MD |
174 | int ret; |
175 | ||
2f77fc4b DG |
176 | /* Send destroy relayd command */ |
177 | ret = consumer_send_destroy_relayd(socket, consumer); | |
178 | if (ret < 0) { | |
c5c45efa | 179 | DBG("Unable to send destroy relayd command to consumer"); |
2f77fc4b DG |
180 | /* Continue since we MUST delete everything at this point. */ |
181 | } | |
182 | } | |
183 | rcu_read_unlock(); | |
184 | } | |
185 | } | |
186 | ||
a4b92340 DG |
187 | /* |
188 | * From a consumer_data structure, allocate and add a consumer socket to the | |
189 | * consumer output. | |
190 | * | |
191 | * Return 0 on success, else negative value on error | |
192 | */ | |
193 | int consumer_create_socket(struct consumer_data *data, | |
194 | struct consumer_output *output) | |
195 | { | |
196 | int ret = 0; | |
197 | struct consumer_socket *socket; | |
198 | ||
199 | assert(data); | |
200 | ||
201 | if (output == NULL || data->cmd_sock < 0) { | |
202 | /* | |
203 | * Not an error. Possible there is simply not spawned consumer or it's | |
204 | * disabled for the tracing session asking the socket. | |
205 | */ | |
206 | goto error; | |
207 | } | |
208 | ||
209 | rcu_read_lock(); | |
210 | socket = consumer_find_socket(data->cmd_sock, output); | |
211 | rcu_read_unlock(); | |
212 | if (socket == NULL) { | |
213 | socket = consumer_allocate_socket(data->cmd_sock); | |
214 | if (socket == NULL) { | |
215 | ret = -1; | |
216 | goto error; | |
217 | } | |
218 | ||
2f77fc4b | 219 | socket->registered = 0; |
a4b92340 DG |
220 | socket->lock = &data->lock; |
221 | rcu_read_lock(); | |
222 | consumer_add_socket(socket, output); | |
223 | rcu_read_unlock(); | |
224 | } | |
225 | ||
226 | DBG3("Consumer socket created (fd: %d) and added to output", | |
227 | data->cmd_sock); | |
228 | ||
229 | error: | |
230 | return ret; | |
231 | } | |
232 | ||
173af62f DG |
233 | /* |
234 | * Find a consumer_socket in a consumer_output hashtable. Read side lock must | |
235 | * be acquired before calling this function and across use of the | |
236 | * returned consumer_socket. | |
237 | */ | |
238 | struct consumer_socket *consumer_find_socket(int key, | |
239 | struct consumer_output *consumer) | |
240 | { | |
241 | struct lttng_ht_iter iter; | |
242 | struct lttng_ht_node_ulong *node; | |
243 | struct consumer_socket *socket = NULL; | |
244 | ||
245 | /* Negative keys are lookup failures */ | |
a4b92340 | 246 | if (key < 0 || consumer == NULL) { |
173af62f DG |
247 | return NULL; |
248 | } | |
249 | ||
250 | lttng_ht_lookup(consumer->socks, (void *)((unsigned long) key), | |
251 | &iter); | |
252 | node = lttng_ht_iter_get_node_ulong(&iter); | |
253 | if (node != NULL) { | |
254 | socket = caa_container_of(node, struct consumer_socket, node); | |
255 | } | |
256 | ||
257 | return socket; | |
258 | } | |
259 | ||
260 | /* | |
261 | * Allocate a new consumer_socket and return the pointer. | |
262 | */ | |
263 | struct consumer_socket *consumer_allocate_socket(int fd) | |
264 | { | |
265 | struct consumer_socket *socket = NULL; | |
266 | ||
267 | socket = zmalloc(sizeof(struct consumer_socket)); | |
268 | if (socket == NULL) { | |
269 | PERROR("zmalloc consumer socket"); | |
270 | goto error; | |
271 | } | |
272 | ||
273 | socket->fd = fd; | |
274 | lttng_ht_node_init_ulong(&socket->node, fd); | |
275 | ||
276 | error: | |
277 | return socket; | |
278 | } | |
279 | ||
280 | /* | |
281 | * Add consumer socket to consumer output object. Read side lock must be | |
282 | * acquired before calling this function. | |
283 | */ | |
284 | void consumer_add_socket(struct consumer_socket *sock, | |
285 | struct consumer_output *consumer) | |
286 | { | |
287 | assert(sock); | |
288 | assert(consumer); | |
289 | ||
290 | lttng_ht_add_unique_ulong(consumer->socks, &sock->node); | |
291 | } | |
292 | ||
293 | /* | |
294 | * Delte consumer socket to consumer output object. Read side lock must be | |
295 | * acquired before calling this function. | |
296 | */ | |
297 | void consumer_del_socket(struct consumer_socket *sock, | |
298 | struct consumer_output *consumer) | |
299 | { | |
300 | int ret; | |
301 | struct lttng_ht_iter iter; | |
302 | ||
303 | assert(sock); | |
304 | assert(consumer); | |
305 | ||
306 | iter.iter.node = &sock->node.node; | |
307 | ret = lttng_ht_del(consumer->socks, &iter); | |
308 | assert(!ret); | |
309 | } | |
310 | ||
311 | /* | |
312 | * RCU destroy call function. | |
313 | */ | |
314 | static void destroy_socket_rcu(struct rcu_head *head) | |
315 | { | |
316 | struct lttng_ht_node_ulong *node = | |
317 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
318 | struct consumer_socket *socket = | |
319 | caa_container_of(node, struct consumer_socket, node); | |
320 | ||
321 | free(socket); | |
322 | } | |
323 | ||
324 | /* | |
325 | * Destroy and free socket pointer in a call RCU. Read side lock must be | |
326 | * acquired before calling this function. | |
327 | */ | |
328 | void consumer_destroy_socket(struct consumer_socket *sock) | |
329 | { | |
330 | assert(sock); | |
331 | ||
332 | /* | |
333 | * We DO NOT close the file descriptor here since it is global to the | |
2f77fc4b DG |
334 | * session daemon and is closed only if the consumer dies or a custom |
335 | * consumer was registered, | |
173af62f | 336 | */ |
2f77fc4b DG |
337 | if (sock->registered) { |
338 | DBG3("Consumer socket was registered. Closing fd %d", sock->fd); | |
339 | lttcomm_close_unix_sock(sock->fd); | |
340 | } | |
173af62f DG |
341 | |
342 | call_rcu(&sock->node.head, destroy_socket_rcu); | |
343 | } | |
344 | ||
00e2e675 DG |
345 | /* |
346 | * Allocate and assign data to a consumer_output object. | |
347 | * | |
348 | * Return pointer to structure. | |
349 | */ | |
350 | struct consumer_output *consumer_create_output(enum consumer_dst_type type) | |
351 | { | |
352 | struct consumer_output *output = NULL; | |
353 | ||
354 | output = zmalloc(sizeof(struct consumer_output)); | |
355 | if (output == NULL) { | |
356 | PERROR("zmalloc consumer_output"); | |
357 | goto error; | |
358 | } | |
359 | ||
360 | /* By default, consumer output is enabled */ | |
361 | output->enabled = 1; | |
362 | output->type = type; | |
d88aee68 | 363 | output->net_seq_index = (uint64_t) -1ULL; |
173af62f DG |
364 | |
365 | output->socks = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
00e2e675 DG |
366 | |
367 | error: | |
368 | return output; | |
369 | } | |
370 | ||
371 | /* | |
372 | * Delete the consumer_output object from the list and free the ptr. | |
373 | */ | |
374 | void consumer_destroy_output(struct consumer_output *obj) | |
375 | { | |
376 | if (obj == NULL) { | |
377 | return; | |
378 | } | |
379 | ||
173af62f DG |
380 | if (obj->socks) { |
381 | struct lttng_ht_iter iter; | |
382 | struct consumer_socket *socket; | |
383 | ||
2f77fc4b | 384 | rcu_read_lock(); |
173af62f | 385 | cds_lfht_for_each_entry(obj->socks->ht, &iter.iter, socket, node.node) { |
2f77fc4b | 386 | consumer_del_socket(socket, obj); |
173af62f DG |
387 | consumer_destroy_socket(socket); |
388 | } | |
2f77fc4b DG |
389 | rcu_read_unlock(); |
390 | ||
391 | /* Finally destroy HT */ | |
392 | lttng_ht_destroy(obj->socks); | |
00e2e675 | 393 | } |
173af62f | 394 | |
00e2e675 DG |
395 | free(obj); |
396 | } | |
397 | ||
398 | /* | |
399 | * Copy consumer output and returned the newly allocated copy. | |
400 | */ | |
401 | struct consumer_output *consumer_copy_output(struct consumer_output *obj) | |
402 | { | |
09a90bcd | 403 | struct lttng_ht *tmp_ht_ptr; |
173af62f DG |
404 | struct lttng_ht_iter iter; |
405 | struct consumer_socket *socket, *copy_sock; | |
00e2e675 DG |
406 | struct consumer_output *output; |
407 | ||
408 | assert(obj); | |
409 | ||
410 | output = consumer_create_output(obj->type); | |
411 | if (output == NULL) { | |
412 | goto error; | |
413 | } | |
09a90bcd DG |
414 | /* Avoid losing the HT reference after the memcpy() */ |
415 | tmp_ht_ptr = output->socks; | |
00e2e675 DG |
416 | |
417 | memcpy(output, obj, sizeof(struct consumer_output)); | |
418 | ||
09a90bcd DG |
419 | /* Putting back the HT pointer and start copying socket(s). */ |
420 | output->socks = tmp_ht_ptr; | |
173af62f | 421 | |
b82c5c4d | 422 | rcu_read_lock(); |
173af62f DG |
423 | cds_lfht_for_each_entry(obj->socks->ht, &iter.iter, socket, node.node) { |
424 | /* Create new socket object. */ | |
425 | copy_sock = consumer_allocate_socket(socket->fd); | |
426 | if (copy_sock == NULL) { | |
b82c5c4d | 427 | rcu_read_unlock(); |
173af62f DG |
428 | goto malloc_error; |
429 | } | |
430 | ||
09a90bcd | 431 | copy_sock->registered = socket->registered; |
173af62f DG |
432 | copy_sock->lock = socket->lock; |
433 | consumer_add_socket(copy_sock, output); | |
434 | } | |
b82c5c4d | 435 | rcu_read_unlock(); |
173af62f | 436 | |
00e2e675 DG |
437 | error: |
438 | return output; | |
173af62f DG |
439 | |
440 | malloc_error: | |
441 | consumer_destroy_output(output); | |
442 | return NULL; | |
00e2e675 DG |
443 | } |
444 | ||
445 | /* | |
446 | * Set network URI to the consumer output object. | |
447 | * | |
ad20f474 DG |
448 | * Return 0 on success. Return 1 if the URI were equal. Else, negative value on |
449 | * error. | |
00e2e675 DG |
450 | */ |
451 | int consumer_set_network_uri(struct consumer_output *obj, | |
452 | struct lttng_uri *uri) | |
453 | { | |
454 | int ret; | |
455 | char tmp_path[PATH_MAX]; | |
456 | char hostname[HOST_NAME_MAX]; | |
457 | struct lttng_uri *dst_uri = NULL; | |
458 | ||
459 | /* Code flow error safety net. */ | |
460 | assert(obj); | |
461 | assert(uri); | |
462 | ||
463 | switch (uri->stype) { | |
464 | case LTTNG_STREAM_CONTROL: | |
465 | dst_uri = &obj->dst.net.control; | |
466 | obj->dst.net.control_isset = 1; | |
467 | if (uri->port == 0) { | |
468 | /* Assign default port. */ | |
469 | uri->port = DEFAULT_NETWORK_CONTROL_PORT; | |
470 | } | |
ad20f474 | 471 | DBG3("Consumer control URI set with port %d", uri->port); |
00e2e675 DG |
472 | break; |
473 | case LTTNG_STREAM_DATA: | |
474 | dst_uri = &obj->dst.net.data; | |
475 | obj->dst.net.data_isset = 1; | |
476 | if (uri->port == 0) { | |
477 | /* Assign default port. */ | |
478 | uri->port = DEFAULT_NETWORK_DATA_PORT; | |
479 | } | |
ad20f474 | 480 | DBG3("Consumer data URI set with port %d", uri->port); |
00e2e675 DG |
481 | break; |
482 | default: | |
483 | ERR("Set network uri type unknown %d", uri->stype); | |
484 | goto error; | |
485 | } | |
486 | ||
487 | ret = uri_compare(dst_uri, uri); | |
488 | if (!ret) { | |
489 | /* Same URI, don't touch it and return success. */ | |
490 | DBG3("URI network compare are the same"); | |
ad20f474 | 491 | goto equal; |
00e2e675 DG |
492 | } |
493 | ||
494 | /* URIs were not equal, replacing it. */ | |
495 | memset(dst_uri, 0, sizeof(struct lttng_uri)); | |
496 | memcpy(dst_uri, uri, sizeof(struct lttng_uri)); | |
497 | obj->type = CONSUMER_DST_NET; | |
498 | ||
499 | /* Handle subdir and add hostname in front. */ | |
500 | if (dst_uri->stype == LTTNG_STREAM_CONTROL) { | |
501 | /* Get hostname to append it in the pathname */ | |
502 | ret = gethostname(hostname, sizeof(hostname)); | |
503 | if (ret < 0) { | |
504 | PERROR("gethostname. Fallback on default localhost"); | |
505 | strncpy(hostname, "localhost", sizeof(hostname)); | |
506 | } | |
507 | hostname[sizeof(hostname) - 1] = '\0'; | |
508 | ||
509 | /* Setup consumer subdir if none present in the control URI */ | |
510 | if (strlen(dst_uri->subdir) == 0) { | |
511 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", | |
512 | hostname, obj->subdir); | |
513 | } else { | |
514 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", | |
515 | hostname, dst_uri->subdir); | |
516 | } | |
517 | if (ret < 0) { | |
518 | PERROR("snprintf set consumer uri subdir"); | |
519 | goto error; | |
520 | } | |
521 | ||
522 | strncpy(obj->subdir, tmp_path, sizeof(obj->subdir)); | |
523 | DBG3("Consumer set network uri subdir path %s", tmp_path); | |
524 | } | |
525 | ||
00e2e675 | 526 | return 0; |
ad20f474 DG |
527 | equal: |
528 | return 1; | |
00e2e675 DG |
529 | error: |
530 | return -1; | |
531 | } | |
532 | ||
533 | /* | |
534 | * Send file descriptor to consumer via sock. | |
535 | */ | |
f50f23d9 | 536 | int consumer_send_fds(struct consumer_socket *sock, int *fds, size_t nb_fd) |
00e2e675 DG |
537 | { |
538 | int ret; | |
539 | ||
540 | assert(fds); | |
f50f23d9 | 541 | assert(sock); |
00e2e675 DG |
542 | assert(nb_fd > 0); |
543 | ||
f50f23d9 | 544 | ret = lttcomm_send_fds_unix_sock(sock->fd, fds, nb_fd); |
00e2e675 | 545 | if (ret < 0) { |
3448e266 DG |
546 | /* The above call will print a PERROR on error. */ |
547 | DBG("Error when sending consumer fds on sock %d", sock->fd); | |
00e2e675 DG |
548 | goto error; |
549 | } | |
550 | ||
f50f23d9 DG |
551 | ret = consumer_recv_status_reply(sock); |
552 | ||
00e2e675 DG |
553 | error: |
554 | return ret; | |
555 | } | |
556 | ||
ffe60014 DG |
557 | /* |
558 | * Consumer send communication message structure to consumer. | |
559 | */ | |
560 | int consumer_send_msg(struct consumer_socket *sock, | |
561 | struct lttcomm_consumer_msg *msg) | |
562 | { | |
563 | int ret; | |
564 | ||
565 | assert(msg); | |
566 | assert(sock); | |
567 | assert(sock->fd >= 0); | |
568 | ||
569 | ret = lttcomm_send_unix_sock(sock->fd, msg, | |
570 | sizeof(struct lttcomm_consumer_msg)); | |
571 | if (ret < 0) { | |
572 | /* The above call will print a PERROR on error. */ | |
573 | DBG("Error when sending consumer channel on sock %d", sock->fd); | |
574 | goto error; | |
575 | } | |
576 | ||
577 | ret = consumer_recv_status_reply(sock); | |
578 | ||
579 | error: | |
580 | return ret; | |
581 | } | |
582 | ||
00e2e675 DG |
583 | /* |
584 | * Consumer send channel communication message structure to consumer. | |
585 | */ | |
f50f23d9 DG |
586 | int consumer_send_channel(struct consumer_socket *sock, |
587 | struct lttcomm_consumer_msg *msg) | |
00e2e675 DG |
588 | { |
589 | int ret; | |
590 | ||
591 | assert(msg); | |
f50f23d9 DG |
592 | assert(sock); |
593 | assert(sock->fd >= 0); | |
00e2e675 | 594 | |
f50f23d9 | 595 | ret = lttcomm_send_unix_sock(sock->fd, msg, |
00e2e675 DG |
596 | sizeof(struct lttcomm_consumer_msg)); |
597 | if (ret < 0) { | |
3448e266 DG |
598 | /* The above call will print a PERROR on error. */ |
599 | DBG("Error when sending consumer channel on sock %d", sock->fd); | |
00e2e675 DG |
600 | goto error; |
601 | } | |
602 | ||
f50f23d9 DG |
603 | ret = consumer_recv_status_reply(sock); |
604 | ||
00e2e675 DG |
605 | error: |
606 | return ret; | |
607 | } | |
608 | ||
ffe60014 DG |
609 | /* |
610 | * Populate the given consumer msg structure with the ask_channel command | |
611 | * information. | |
612 | */ | |
613 | void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg *msg, | |
614 | uint64_t subbuf_size, | |
615 | uint64_t num_subbuf, | |
616 | int overwrite, | |
617 | unsigned int switch_timer_interval, | |
618 | unsigned int read_timer_interval, | |
619 | int output, | |
620 | int type, | |
621 | uint64_t session_id, | |
622 | const char *pathname, | |
623 | const char *name, | |
624 | uid_t uid, | |
625 | gid_t gid, | |
d88aee68 DG |
626 | uint64_t relayd_id, |
627 | uint64_t key, | |
ffe60014 DG |
628 | unsigned char *uuid) |
629 | { | |
630 | assert(msg); | |
631 | ||
632 | /* Zeroed structure */ | |
633 | memset(msg, 0, sizeof(struct lttcomm_consumer_msg)); | |
634 | ||
635 | msg->cmd_type = LTTNG_CONSUMER_ASK_CHANNEL_CREATION; | |
636 | msg->u.ask_channel.subbuf_size = subbuf_size; | |
637 | msg->u.ask_channel.num_subbuf = num_subbuf ; | |
638 | msg->u.ask_channel.overwrite = overwrite; | |
639 | msg->u.ask_channel.switch_timer_interval = switch_timer_interval; | |
640 | msg->u.ask_channel.read_timer_interval = read_timer_interval; | |
641 | msg->u.ask_channel.output = output; | |
642 | msg->u.ask_channel.type = type; | |
643 | msg->u.ask_channel.session_id = session_id; | |
644 | msg->u.ask_channel.uid = uid; | |
645 | msg->u.ask_channel.gid = gid; | |
646 | msg->u.ask_channel.relayd_id = relayd_id; | |
647 | msg->u.ask_channel.key = key; | |
648 | ||
649 | memcpy(msg->u.ask_channel.uuid, uuid, sizeof(msg->u.ask_channel.uuid)); | |
650 | ||
651 | strncpy(msg->u.ask_channel.pathname, pathname, | |
652 | sizeof(msg->u.ask_channel.pathname)); | |
653 | msg->u.ask_channel.pathname[sizeof(msg->u.ask_channel.pathname)-1] = '\0'; | |
654 | ||
655 | strncpy(msg->u.ask_channel.name, name, sizeof(msg->u.ask_channel.name)); | |
656 | msg->u.ask_channel.name[sizeof(msg->u.ask_channel.name) - 1] = '\0'; | |
657 | } | |
658 | ||
00e2e675 DG |
659 | /* |
660 | * Init channel communication message structure. | |
661 | */ | |
662 | void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg *msg, | |
663 | enum lttng_consumer_command cmd, | |
d88aee68 | 664 | uint64_t channel_key, |
ffe60014 DG |
665 | uint64_t session_id, |
666 | const char *pathname, | |
667 | uid_t uid, | |
668 | gid_t gid, | |
d88aee68 | 669 | uint64_t relayd_id, |
c30aaa51 | 670 | const char *name, |
ffe60014 DG |
671 | unsigned int nb_init_streams, |
672 | enum lttng_event_output output, | |
673 | int type) | |
00e2e675 DG |
674 | { |
675 | assert(msg); | |
676 | ||
00e2e675 DG |
677 | /* Zeroed structure */ |
678 | memset(msg, 0, sizeof(struct lttcomm_consumer_msg)); | |
679 | ||
680 | /* Send channel */ | |
681 | msg->cmd_type = cmd; | |
682 | msg->u.channel.channel_key = channel_key; | |
ffe60014 DG |
683 | msg->u.channel.session_id = session_id; |
684 | msg->u.channel.uid = uid; | |
685 | msg->u.channel.gid = gid; | |
686 | msg->u.channel.relayd_id = relayd_id; | |
c30aaa51 | 687 | msg->u.channel.nb_init_streams = nb_init_streams; |
ffe60014 DG |
688 | msg->u.channel.output = output; |
689 | msg->u.channel.type = type; | |
690 | ||
691 | strncpy(msg->u.channel.pathname, pathname, | |
692 | sizeof(msg->u.channel.pathname)); | |
693 | msg->u.channel.pathname[sizeof(msg->u.channel.pathname) - 1] = '\0'; | |
694 | ||
695 | strncpy(msg->u.channel.name, name, sizeof(msg->u.channel.name)); | |
696 | msg->u.channel.name[sizeof(msg->u.channel.name) - 1] = '\0'; | |
00e2e675 DG |
697 | } |
698 | ||
699 | /* | |
700 | * Init stream communication message structure. | |
701 | */ | |
702 | void consumer_init_stream_comm_msg(struct lttcomm_consumer_msg *msg, | |
703 | enum lttng_consumer_command cmd, | |
d88aee68 DG |
704 | uint64_t channel_key, |
705 | uint64_t stream_key, | |
ffe60014 | 706 | int cpu) |
00e2e675 DG |
707 | { |
708 | assert(msg); | |
709 | ||
710 | memset(msg, 0, sizeof(struct lttcomm_consumer_msg)); | |
711 | ||
00e2e675 DG |
712 | msg->cmd_type = cmd; |
713 | msg->u.stream.channel_key = channel_key; | |
714 | msg->u.stream.stream_key = stream_key; | |
ffe60014 | 715 | msg->u.stream.cpu = cpu; |
00e2e675 DG |
716 | } |
717 | ||
718 | /* | |
719 | * Send stream communication structure to the consumer. | |
720 | */ | |
f50f23d9 DG |
721 | int consumer_send_stream(struct consumer_socket *sock, |
722 | struct consumer_output *dst, struct lttcomm_consumer_msg *msg, | |
723 | int *fds, size_t nb_fd) | |
00e2e675 DG |
724 | { |
725 | int ret; | |
726 | ||
727 | assert(msg); | |
728 | assert(dst); | |
f50f23d9 | 729 | assert(sock); |
ffe60014 | 730 | assert(fds); |
00e2e675 DG |
731 | |
732 | /* Send on socket */ | |
f50f23d9 | 733 | ret = lttcomm_send_unix_sock(sock->fd, msg, |
00e2e675 DG |
734 | sizeof(struct lttcomm_consumer_msg)); |
735 | if (ret < 0) { | |
3448e266 DG |
736 | /* The above call will print a PERROR on error. */ |
737 | DBG("Error when sending consumer stream on sock %d", sock->fd); | |
00e2e675 DG |
738 | goto error; |
739 | } | |
740 | ||
f50f23d9 DG |
741 | ret = consumer_recv_status_reply(sock); |
742 | if (ret < 0) { | |
743 | goto error; | |
744 | } | |
745 | ||
00e2e675 DG |
746 | ret = consumer_send_fds(sock, fds, nb_fd); |
747 | if (ret < 0) { | |
748 | goto error; | |
749 | } | |
750 | ||
751 | error: | |
752 | return ret; | |
753 | } | |
37278a1e DG |
754 | |
755 | /* | |
756 | * Send relayd socket to consumer associated with a session name. | |
757 | * | |
758 | * On success return positive value. On error, negative value. | |
759 | */ | |
f50f23d9 | 760 | int consumer_send_relayd_socket(struct consumer_socket *consumer_sock, |
37278a1e | 761 | struct lttcomm_sock *sock, struct consumer_output *consumer, |
d88aee68 | 762 | enum lttng_stream_type type, uint64_t session_id) |
37278a1e DG |
763 | { |
764 | int ret; | |
765 | struct lttcomm_consumer_msg msg; | |
766 | ||
767 | /* Code flow error. Safety net. */ | |
768 | assert(sock); | |
769 | assert(consumer); | |
f50f23d9 | 770 | assert(consumer_sock); |
37278a1e DG |
771 | |
772 | /* Bail out if consumer is disabled */ | |
773 | if (!consumer->enabled) { | |
f73fabfd | 774 | ret = LTTNG_OK; |
37278a1e DG |
775 | goto error; |
776 | } | |
777 | ||
778 | msg.cmd_type = LTTNG_CONSUMER_ADD_RELAYD_SOCKET; | |
779 | /* | |
780 | * Assign network consumer output index using the temporary consumer since | |
781 | * this call should only be made from within a set_consumer_uri() function | |
782 | * call in the session daemon. | |
783 | */ | |
784 | msg.u.relayd_sock.net_index = consumer->net_seq_index; | |
785 | msg.u.relayd_sock.type = type; | |
46e6455f | 786 | msg.u.relayd_sock.session_id = session_id; |
37278a1e DG |
787 | memcpy(&msg.u.relayd_sock.sock, sock, sizeof(msg.u.relayd_sock.sock)); |
788 | ||
f50f23d9 DG |
789 | DBG3("Sending relayd sock info to consumer on %d", consumer_sock->fd); |
790 | ret = lttcomm_send_unix_sock(consumer_sock->fd, &msg, sizeof(msg)); | |
37278a1e | 791 | if (ret < 0) { |
3448e266 DG |
792 | /* The above call will print a PERROR on error. */ |
793 | DBG("Error when sending relayd sockets on sock %d", sock->fd); | |
37278a1e DG |
794 | goto error; |
795 | } | |
796 | ||
f50f23d9 DG |
797 | ret = consumer_recv_status_reply(consumer_sock); |
798 | if (ret < 0) { | |
799 | goto error; | |
800 | } | |
801 | ||
37278a1e DG |
802 | DBG3("Sending relayd socket file descriptor to consumer"); |
803 | ret = consumer_send_fds(consumer_sock, &sock->fd, 1); | |
804 | if (ret < 0) { | |
805 | goto error; | |
806 | } | |
807 | ||
808 | DBG2("Consumer relayd socket sent"); | |
809 | ||
810 | error: | |
811 | return ret; | |
812 | } | |
173af62f DG |
813 | |
814 | /* | |
2f77fc4b DG |
815 | * Set consumer subdirectory using the session name and a generated datetime if |
816 | * needed. This is appended to the current subdirectory. | |
173af62f | 817 | */ |
2f77fc4b DG |
818 | int consumer_set_subdir(struct consumer_output *consumer, |
819 | const char *session_name) | |
173af62f | 820 | { |
2f77fc4b DG |
821 | int ret = 0; |
822 | unsigned int have_default_name = 0; | |
823 | char datetime[16], tmp_path[PATH_MAX]; | |
824 | time_t rawtime; | |
825 | struct tm *timeinfo; | |
173af62f DG |
826 | |
827 | assert(consumer); | |
2f77fc4b DG |
828 | assert(session_name); |
829 | ||
830 | memset(tmp_path, 0, sizeof(tmp_path)); | |
831 | ||
832 | /* Flag if we have a default session. */ | |
833 | if (strncmp(session_name, DEFAULT_SESSION_NAME "-", | |
834 | strlen(DEFAULT_SESSION_NAME) + 1) == 0) { | |
835 | have_default_name = 1; | |
836 | } else { | |
837 | /* Get date and time for session path */ | |
838 | time(&rawtime); | |
839 | timeinfo = localtime(&rawtime); | |
840 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
173af62f DG |
841 | } |
842 | ||
2f77fc4b DG |
843 | if (have_default_name) { |
844 | ret = snprintf(tmp_path, sizeof(tmp_path), | |
845 | "%s/%s", consumer->subdir, session_name); | |
846 | } else { | |
847 | ret = snprintf(tmp_path, sizeof(tmp_path), | |
848 | "%s/%s-%s/", consumer->subdir, session_name, datetime); | |
849 | } | |
173af62f | 850 | if (ret < 0) { |
2f77fc4b | 851 | PERROR("snprintf session name date"); |
173af62f DG |
852 | goto error; |
853 | } | |
854 | ||
2f77fc4b DG |
855 | strncpy(consumer->subdir, tmp_path, sizeof(consumer->subdir)); |
856 | DBG2("Consumer subdir set to %s", consumer->subdir); | |
173af62f DG |
857 | |
858 | error: | |
859 | return ret; | |
860 | } | |
806e2684 DG |
861 | |
862 | /* | |
6d805429 | 863 | * Ask the consumer if the data is ready to read (NOT pending) for the specific |
806e2684 DG |
864 | * session id. |
865 | * | |
866 | * This function has a different behavior with the consumer i.e. that it waits | |
6d805429 | 867 | * for a reply from the consumer if yes or no the data is pending. |
806e2684 | 868 | */ |
d88aee68 | 869 | int consumer_is_data_pending(uint64_t session_id, |
806e2684 DG |
870 | struct consumer_output *consumer) |
871 | { | |
872 | int ret; | |
6d805429 | 873 | int32_t ret_code = 0; /* Default is that the data is NOT pending */ |
806e2684 DG |
874 | struct consumer_socket *socket; |
875 | struct lttng_ht_iter iter; | |
876 | struct lttcomm_consumer_msg msg; | |
877 | ||
878 | assert(consumer); | |
879 | ||
6d805429 | 880 | msg.cmd_type = LTTNG_CONSUMER_DATA_PENDING; |
806e2684 | 881 | |
d88aee68 | 882 | msg.u.data_pending.session_id = session_id; |
806e2684 | 883 | |
d88aee68 | 884 | DBG3("Consumer data pending for id %" PRIu64, session_id); |
806e2684 | 885 | |
c8f59ee5 | 886 | /* Send command for each consumer */ |
b82c5c4d | 887 | rcu_read_lock(); |
806e2684 DG |
888 | cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket, |
889 | node.node) { | |
890 | /* Code flow error */ | |
891 | assert(socket->fd >= 0); | |
892 | ||
893 | pthread_mutex_lock(socket->lock); | |
894 | ||
895 | ret = lttcomm_send_unix_sock(socket->fd, &msg, sizeof(msg)); | |
896 | if (ret < 0) { | |
3448e266 DG |
897 | /* The above call will print a PERROR on error. */ |
898 | DBG("Error on consumer is data pending on sock %d", socket->fd); | |
806e2684 | 899 | pthread_mutex_unlock(socket->lock); |
b82c5c4d | 900 | goto error_unlock; |
806e2684 DG |
901 | } |
902 | ||
f50f23d9 DG |
903 | /* |
904 | * No need for a recv reply status because the answer to the command is | |
905 | * the reply status message. | |
906 | */ | |
907 | ||
806e2684 | 908 | ret = lttcomm_recv_unix_sock(socket->fd, &ret_code, sizeof(ret_code)); |
a6cd2b97 DG |
909 | if (ret <= 0) { |
910 | if (ret == 0) { | |
911 | /* Orderly shutdown. Don't return 0 which means success. */ | |
912 | ret = -1; | |
913 | } | |
3448e266 DG |
914 | /* The above call will print a PERROR on error. */ |
915 | DBG("Error on recv consumer is data pending on sock %d", socket->fd); | |
806e2684 | 916 | pthread_mutex_unlock(socket->lock); |
b82c5c4d | 917 | goto error_unlock; |
806e2684 DG |
918 | } |
919 | ||
920 | pthread_mutex_unlock(socket->lock); | |
921 | ||
6d805429 | 922 | if (ret_code == 1) { |
806e2684 DG |
923 | break; |
924 | } | |
925 | } | |
b82c5c4d | 926 | rcu_read_unlock(); |
806e2684 | 927 | |
d88aee68 DG |
928 | DBG("Consumer data is %s pending for session id %" PRIu64, |
929 | ret_code == 1 ? "" : "NOT", session_id); | |
806e2684 DG |
930 | return ret_code; |
931 | ||
b82c5c4d DG |
932 | error_unlock: |
933 | rcu_read_unlock(); | |
806e2684 DG |
934 | return -1; |
935 | } |