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" | |
7972aab2 DG |
33 | #include "health.h" |
34 | #include "ust-app.h" | |
00e2e675 | 35 | |
f50f23d9 DG |
36 | /* |
37 | * Receive a reply command status message from the consumer. Consumer socket | |
38 | * lock MUST be acquired before calling this function. | |
39 | * | |
40 | * Return 0 on success, -1 on recv error or a negative lttng error code which | |
41 | * was possibly returned by the consumer. | |
42 | */ | |
43 | int consumer_recv_status_reply(struct consumer_socket *sock) | |
44 | { | |
45 | int ret; | |
46 | struct lttcomm_consumer_status_msg reply; | |
47 | ||
48 | assert(sock); | |
49 | ||
50 | ret = lttcomm_recv_unix_sock(sock->fd, &reply, sizeof(reply)); | |
a6cd2b97 DG |
51 | if (ret <= 0) { |
52 | if (ret == 0) { | |
53 | /* Orderly shutdown. Don't return 0 which means success. */ | |
54 | ret = -1; | |
55 | } | |
3448e266 DG |
56 | /* The above call will print a PERROR on error. */ |
57 | DBG("Fail to receive status reply on sock %d", sock->fd); | |
f50f23d9 DG |
58 | goto end; |
59 | } | |
60 | ||
61 | if (reply.ret_code == LTTNG_OK) { | |
62 | /* All good. */ | |
63 | ret = 0; | |
64 | } else { | |
65 | ret = -reply.ret_code; | |
ffe60014 | 66 | DBG("Consumer ret code %d", ret); |
f50f23d9 DG |
67 | } |
68 | ||
69 | end: | |
70 | return ret; | |
71 | } | |
72 | ||
ffe60014 DG |
73 | /* |
74 | * Once the ASK_CHANNEL command is sent to the consumer, the channel | |
75 | * information are sent back. This call receives that data and populates key | |
76 | * and stream_count. | |
77 | * | |
78 | * On success return 0 and both key and stream_count are set. On error, a | |
79 | * negative value is sent back and both parameters are untouched. | |
80 | */ | |
81 | int consumer_recv_status_channel(struct consumer_socket *sock, | |
d88aee68 | 82 | uint64_t *key, unsigned int *stream_count) |
ffe60014 DG |
83 | { |
84 | int ret; | |
85 | struct lttcomm_consumer_status_channel reply; | |
86 | ||
87 | assert(sock); | |
88 | assert(stream_count); | |
89 | assert(key); | |
90 | ||
91 | ret = lttcomm_recv_unix_sock(sock->fd, &reply, sizeof(reply)); | |
92 | if (ret <= 0) { | |
93 | if (ret == 0) { | |
94 | /* Orderly shutdown. Don't return 0 which means success. */ | |
95 | ret = -1; | |
96 | } | |
97 | /* The above call will print a PERROR on error. */ | |
98 | DBG("Fail to receive status reply on sock %d", sock->fd); | |
99 | goto end; | |
100 | } | |
101 | ||
102 | /* An error is possible so don't touch the key and stream_count. */ | |
103 | if (reply.ret_code != LTTNG_OK) { | |
104 | ret = -1; | |
105 | goto end; | |
106 | } | |
107 | ||
108 | *key = reply.key; | |
109 | *stream_count = reply.stream_count; | |
110 | ||
111 | end: | |
112 | return ret; | |
113 | } | |
114 | ||
2f77fc4b DG |
115 | /* |
116 | * Send destroy relayd command to consumer. | |
117 | * | |
118 | * On success return positive value. On error, negative value. | |
119 | */ | |
120 | int consumer_send_destroy_relayd(struct consumer_socket *sock, | |
121 | struct consumer_output *consumer) | |
122 | { | |
123 | int ret; | |
124 | struct lttcomm_consumer_msg msg; | |
125 | ||
126 | assert(consumer); | |
127 | assert(sock); | |
128 | ||
ffe60014 | 129 | DBG2("Sending destroy relayd command to consumer sock %d", sock->fd); |
2f77fc4b DG |
130 | |
131 | /* Bail out if consumer is disabled */ | |
132 | if (!consumer->enabled) { | |
f73fabfd | 133 | ret = LTTNG_OK; |
2f77fc4b DG |
134 | DBG3("Consumer is disabled"); |
135 | goto error; | |
136 | } | |
137 | ||
138 | msg.cmd_type = LTTNG_CONSUMER_DESTROY_RELAYD; | |
139 | msg.u.destroy_relayd.net_seq_idx = consumer->net_seq_index; | |
140 | ||
141 | pthread_mutex_lock(sock->lock); | |
142 | ret = lttcomm_send_unix_sock(sock->fd, &msg, sizeof(msg)); | |
2f77fc4b | 143 | if (ret < 0) { |
c5c45efa DG |
144 | /* Indicate that the consumer is probably closing at this point. */ |
145 | DBG("send consumer destroy relayd command"); | |
f50f23d9 | 146 | goto error_send; |
2f77fc4b DG |
147 | } |
148 | ||
f50f23d9 DG |
149 | /* Don't check the return value. The caller will do it. */ |
150 | ret = consumer_recv_status_reply(sock); | |
151 | ||
2f77fc4b DG |
152 | DBG2("Consumer send destroy relayd command done"); |
153 | ||
f50f23d9 DG |
154 | error_send: |
155 | pthread_mutex_unlock(sock->lock); | |
2f77fc4b DG |
156 | error: |
157 | return ret; | |
158 | } | |
159 | ||
160 | /* | |
161 | * For each consumer socket in the consumer output object, send a destroy | |
162 | * relayd command. | |
163 | */ | |
164 | void consumer_output_send_destroy_relayd(struct consumer_output *consumer) | |
165 | { | |
2f77fc4b DG |
166 | struct lttng_ht_iter iter; |
167 | struct consumer_socket *socket; | |
168 | ||
169 | assert(consumer); | |
170 | ||
171 | /* Destroy any relayd connection */ | |
172 | if (consumer && consumer->type == CONSUMER_DST_NET) { | |
173 | rcu_read_lock(); | |
174 | cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket, | |
175 | node.node) { | |
c617c0c6 MD |
176 | int ret; |
177 | ||
2f77fc4b DG |
178 | /* Send destroy relayd command */ |
179 | ret = consumer_send_destroy_relayd(socket, consumer); | |
180 | if (ret < 0) { | |
c5c45efa | 181 | DBG("Unable to send destroy relayd command to consumer"); |
2f77fc4b DG |
182 | /* Continue since we MUST delete everything at this point. */ |
183 | } | |
184 | } | |
185 | rcu_read_unlock(); | |
186 | } | |
187 | } | |
188 | ||
a4b92340 DG |
189 | /* |
190 | * From a consumer_data structure, allocate and add a consumer socket to the | |
191 | * consumer output. | |
192 | * | |
193 | * Return 0 on success, else negative value on error | |
194 | */ | |
195 | int consumer_create_socket(struct consumer_data *data, | |
196 | struct consumer_output *output) | |
197 | { | |
198 | int ret = 0; | |
199 | struct consumer_socket *socket; | |
200 | ||
201 | assert(data); | |
202 | ||
203 | if (output == NULL || data->cmd_sock < 0) { | |
204 | /* | |
205 | * Not an error. Possible there is simply not spawned consumer or it's | |
206 | * disabled for the tracing session asking the socket. | |
207 | */ | |
208 | goto error; | |
209 | } | |
210 | ||
211 | rcu_read_lock(); | |
212 | socket = consumer_find_socket(data->cmd_sock, output); | |
213 | rcu_read_unlock(); | |
214 | if (socket == NULL) { | |
215 | socket = consumer_allocate_socket(data->cmd_sock); | |
216 | if (socket == NULL) { | |
217 | ret = -1; | |
218 | goto error; | |
219 | } | |
220 | ||
2f77fc4b | 221 | socket->registered = 0; |
a4b92340 DG |
222 | socket->lock = &data->lock; |
223 | rcu_read_lock(); | |
224 | consumer_add_socket(socket, output); | |
225 | rcu_read_unlock(); | |
226 | } | |
227 | ||
228 | DBG3("Consumer socket created (fd: %d) and added to output", | |
229 | data->cmd_sock); | |
230 | ||
231 | error: | |
232 | return ret; | |
233 | } | |
234 | ||
7972aab2 DG |
235 | /* |
236 | * Return the consumer socket from the given consumer output with the right | |
237 | * bitness. On error, returns NULL. | |
238 | * | |
239 | * The caller MUST acquire a rcu read side lock and keep it until the socket | |
240 | * object reference is not needed anymore. | |
241 | */ | |
242 | struct consumer_socket *consumer_find_socket_by_bitness(int bits, | |
243 | struct consumer_output *consumer) | |
244 | { | |
245 | int consumer_fd; | |
246 | struct consumer_socket *socket = NULL; | |
247 | ||
248 | switch (bits) { | |
249 | case 64: | |
250 | consumer_fd = uatomic_read(&ust_consumerd64_fd); | |
251 | break; | |
252 | case 32: | |
253 | consumer_fd = uatomic_read(&ust_consumerd32_fd); | |
254 | break; | |
255 | default: | |
256 | assert(0); | |
257 | goto end; | |
258 | } | |
259 | ||
260 | socket = consumer_find_socket(consumer_fd, consumer); | |
261 | if (!socket) { | |
262 | ERR("Consumer socket fd %d not found in consumer obj %p", | |
263 | consumer_fd, consumer); | |
264 | } | |
265 | ||
266 | end: | |
267 | return socket; | |
268 | } | |
269 | ||
173af62f DG |
270 | /* |
271 | * Find a consumer_socket in a consumer_output hashtable. Read side lock must | |
272 | * be acquired before calling this function and across use of the | |
273 | * returned consumer_socket. | |
274 | */ | |
275 | struct consumer_socket *consumer_find_socket(int key, | |
276 | struct consumer_output *consumer) | |
277 | { | |
278 | struct lttng_ht_iter iter; | |
279 | struct lttng_ht_node_ulong *node; | |
280 | struct consumer_socket *socket = NULL; | |
281 | ||
282 | /* Negative keys are lookup failures */ | |
a4b92340 | 283 | if (key < 0 || consumer == NULL) { |
173af62f DG |
284 | return NULL; |
285 | } | |
286 | ||
287 | lttng_ht_lookup(consumer->socks, (void *)((unsigned long) key), | |
288 | &iter); | |
289 | node = lttng_ht_iter_get_node_ulong(&iter); | |
290 | if (node != NULL) { | |
291 | socket = caa_container_of(node, struct consumer_socket, node); | |
292 | } | |
293 | ||
294 | return socket; | |
295 | } | |
296 | ||
297 | /* | |
298 | * Allocate a new consumer_socket and return the pointer. | |
299 | */ | |
300 | struct consumer_socket *consumer_allocate_socket(int fd) | |
301 | { | |
302 | struct consumer_socket *socket = NULL; | |
303 | ||
304 | socket = zmalloc(sizeof(struct consumer_socket)); | |
305 | if (socket == NULL) { | |
306 | PERROR("zmalloc consumer socket"); | |
307 | goto error; | |
308 | } | |
309 | ||
310 | socket->fd = fd; | |
311 | lttng_ht_node_init_ulong(&socket->node, fd); | |
312 | ||
313 | error: | |
314 | return socket; | |
315 | } | |
316 | ||
317 | /* | |
318 | * Add consumer socket to consumer output object. Read side lock must be | |
319 | * acquired before calling this function. | |
320 | */ | |
321 | void consumer_add_socket(struct consumer_socket *sock, | |
322 | struct consumer_output *consumer) | |
323 | { | |
324 | assert(sock); | |
325 | assert(consumer); | |
326 | ||
327 | lttng_ht_add_unique_ulong(consumer->socks, &sock->node); | |
328 | } | |
329 | ||
330 | /* | |
331 | * Delte consumer socket to consumer output object. Read side lock must be | |
332 | * acquired before calling this function. | |
333 | */ | |
334 | void consumer_del_socket(struct consumer_socket *sock, | |
335 | struct consumer_output *consumer) | |
336 | { | |
337 | int ret; | |
338 | struct lttng_ht_iter iter; | |
339 | ||
340 | assert(sock); | |
341 | assert(consumer); | |
342 | ||
343 | iter.iter.node = &sock->node.node; | |
344 | ret = lttng_ht_del(consumer->socks, &iter); | |
345 | assert(!ret); | |
346 | } | |
347 | ||
348 | /* | |
349 | * RCU destroy call function. | |
350 | */ | |
351 | static void destroy_socket_rcu(struct rcu_head *head) | |
352 | { | |
353 | struct lttng_ht_node_ulong *node = | |
354 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
355 | struct consumer_socket *socket = | |
356 | caa_container_of(node, struct consumer_socket, node); | |
357 | ||
358 | free(socket); | |
359 | } | |
360 | ||
361 | /* | |
362 | * Destroy and free socket pointer in a call RCU. Read side lock must be | |
363 | * acquired before calling this function. | |
364 | */ | |
365 | void consumer_destroy_socket(struct consumer_socket *sock) | |
366 | { | |
367 | assert(sock); | |
368 | ||
369 | /* | |
370 | * We DO NOT close the file descriptor here since it is global to the | |
2f77fc4b DG |
371 | * session daemon and is closed only if the consumer dies or a custom |
372 | * consumer was registered, | |
173af62f | 373 | */ |
2f77fc4b DG |
374 | if (sock->registered) { |
375 | DBG3("Consumer socket was registered. Closing fd %d", sock->fd); | |
376 | lttcomm_close_unix_sock(sock->fd); | |
377 | } | |
173af62f DG |
378 | |
379 | call_rcu(&sock->node.head, destroy_socket_rcu); | |
380 | } | |
381 | ||
00e2e675 DG |
382 | /* |
383 | * Allocate and assign data to a consumer_output object. | |
384 | * | |
385 | * Return pointer to structure. | |
386 | */ | |
387 | struct consumer_output *consumer_create_output(enum consumer_dst_type type) | |
388 | { | |
389 | struct consumer_output *output = NULL; | |
390 | ||
391 | output = zmalloc(sizeof(struct consumer_output)); | |
392 | if (output == NULL) { | |
393 | PERROR("zmalloc consumer_output"); | |
394 | goto error; | |
395 | } | |
396 | ||
397 | /* By default, consumer output is enabled */ | |
398 | output->enabled = 1; | |
399 | output->type = type; | |
d88aee68 | 400 | output->net_seq_index = (uint64_t) -1ULL; |
173af62f DG |
401 | |
402 | output->socks = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
00e2e675 DG |
403 | |
404 | error: | |
405 | return output; | |
406 | } | |
407 | ||
408 | /* | |
409 | * Delete the consumer_output object from the list and free the ptr. | |
410 | */ | |
411 | void consumer_destroy_output(struct consumer_output *obj) | |
412 | { | |
413 | if (obj == NULL) { | |
414 | return; | |
415 | } | |
416 | ||
173af62f DG |
417 | if (obj->socks) { |
418 | struct lttng_ht_iter iter; | |
419 | struct consumer_socket *socket; | |
420 | ||
2f77fc4b | 421 | rcu_read_lock(); |
173af62f | 422 | cds_lfht_for_each_entry(obj->socks->ht, &iter.iter, socket, node.node) { |
2f77fc4b | 423 | consumer_del_socket(socket, obj); |
173af62f DG |
424 | consumer_destroy_socket(socket); |
425 | } | |
2f77fc4b DG |
426 | rcu_read_unlock(); |
427 | ||
428 | /* Finally destroy HT */ | |
429 | lttng_ht_destroy(obj->socks); | |
00e2e675 | 430 | } |
173af62f | 431 | |
00e2e675 DG |
432 | free(obj); |
433 | } | |
434 | ||
435 | /* | |
436 | * Copy consumer output and returned the newly allocated copy. | |
437 | */ | |
438 | struct consumer_output *consumer_copy_output(struct consumer_output *obj) | |
439 | { | |
09a90bcd | 440 | struct lttng_ht *tmp_ht_ptr; |
173af62f DG |
441 | struct lttng_ht_iter iter; |
442 | struct consumer_socket *socket, *copy_sock; | |
00e2e675 DG |
443 | struct consumer_output *output; |
444 | ||
445 | assert(obj); | |
446 | ||
447 | output = consumer_create_output(obj->type); | |
448 | if (output == NULL) { | |
449 | goto error; | |
450 | } | |
09a90bcd DG |
451 | /* Avoid losing the HT reference after the memcpy() */ |
452 | tmp_ht_ptr = output->socks; | |
00e2e675 DG |
453 | |
454 | memcpy(output, obj, sizeof(struct consumer_output)); | |
455 | ||
09a90bcd DG |
456 | /* Putting back the HT pointer and start copying socket(s). */ |
457 | output->socks = tmp_ht_ptr; | |
173af62f | 458 | |
b82c5c4d | 459 | rcu_read_lock(); |
173af62f DG |
460 | cds_lfht_for_each_entry(obj->socks->ht, &iter.iter, socket, node.node) { |
461 | /* Create new socket object. */ | |
462 | copy_sock = consumer_allocate_socket(socket->fd); | |
463 | if (copy_sock == NULL) { | |
b82c5c4d | 464 | rcu_read_unlock(); |
173af62f DG |
465 | goto malloc_error; |
466 | } | |
467 | ||
09a90bcd | 468 | copy_sock->registered = socket->registered; |
173af62f DG |
469 | copy_sock->lock = socket->lock; |
470 | consumer_add_socket(copy_sock, output); | |
471 | } | |
b82c5c4d | 472 | rcu_read_unlock(); |
173af62f | 473 | |
00e2e675 DG |
474 | error: |
475 | return output; | |
173af62f DG |
476 | |
477 | malloc_error: | |
478 | consumer_destroy_output(output); | |
479 | return NULL; | |
00e2e675 DG |
480 | } |
481 | ||
482 | /* | |
483 | * Set network URI to the consumer output object. | |
484 | * | |
ad20f474 DG |
485 | * Return 0 on success. Return 1 if the URI were equal. Else, negative value on |
486 | * error. | |
00e2e675 DG |
487 | */ |
488 | int consumer_set_network_uri(struct consumer_output *obj, | |
489 | struct lttng_uri *uri) | |
490 | { | |
491 | int ret; | |
492 | char tmp_path[PATH_MAX]; | |
493 | char hostname[HOST_NAME_MAX]; | |
494 | struct lttng_uri *dst_uri = NULL; | |
495 | ||
496 | /* Code flow error safety net. */ | |
497 | assert(obj); | |
498 | assert(uri); | |
499 | ||
500 | switch (uri->stype) { | |
501 | case LTTNG_STREAM_CONTROL: | |
502 | dst_uri = &obj->dst.net.control; | |
503 | obj->dst.net.control_isset = 1; | |
504 | if (uri->port == 0) { | |
505 | /* Assign default port. */ | |
506 | uri->port = DEFAULT_NETWORK_CONTROL_PORT; | |
507 | } | |
ad20f474 | 508 | DBG3("Consumer control URI set with port %d", uri->port); |
00e2e675 DG |
509 | break; |
510 | case LTTNG_STREAM_DATA: | |
511 | dst_uri = &obj->dst.net.data; | |
512 | obj->dst.net.data_isset = 1; | |
513 | if (uri->port == 0) { | |
514 | /* Assign default port. */ | |
515 | uri->port = DEFAULT_NETWORK_DATA_PORT; | |
516 | } | |
ad20f474 | 517 | DBG3("Consumer data URI set with port %d", uri->port); |
00e2e675 DG |
518 | break; |
519 | default: | |
520 | ERR("Set network uri type unknown %d", uri->stype); | |
521 | goto error; | |
522 | } | |
523 | ||
524 | ret = uri_compare(dst_uri, uri); | |
525 | if (!ret) { | |
526 | /* Same URI, don't touch it and return success. */ | |
527 | DBG3("URI network compare are the same"); | |
ad20f474 | 528 | goto equal; |
00e2e675 DG |
529 | } |
530 | ||
531 | /* URIs were not equal, replacing it. */ | |
532 | memset(dst_uri, 0, sizeof(struct lttng_uri)); | |
533 | memcpy(dst_uri, uri, sizeof(struct lttng_uri)); | |
534 | obj->type = CONSUMER_DST_NET; | |
535 | ||
536 | /* Handle subdir and add hostname in front. */ | |
537 | if (dst_uri->stype == LTTNG_STREAM_CONTROL) { | |
538 | /* Get hostname to append it in the pathname */ | |
539 | ret = gethostname(hostname, sizeof(hostname)); | |
540 | if (ret < 0) { | |
541 | PERROR("gethostname. Fallback on default localhost"); | |
542 | strncpy(hostname, "localhost", sizeof(hostname)); | |
543 | } | |
544 | hostname[sizeof(hostname) - 1] = '\0'; | |
545 | ||
546 | /* Setup consumer subdir if none present in the control URI */ | |
547 | if (strlen(dst_uri->subdir) == 0) { | |
548 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", | |
549 | hostname, obj->subdir); | |
550 | } else { | |
551 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", | |
552 | hostname, dst_uri->subdir); | |
553 | } | |
554 | if (ret < 0) { | |
555 | PERROR("snprintf set consumer uri subdir"); | |
556 | goto error; | |
557 | } | |
558 | ||
559 | strncpy(obj->subdir, tmp_path, sizeof(obj->subdir)); | |
560 | DBG3("Consumer set network uri subdir path %s", tmp_path); | |
561 | } | |
562 | ||
00e2e675 | 563 | return 0; |
ad20f474 DG |
564 | equal: |
565 | return 1; | |
00e2e675 DG |
566 | error: |
567 | return -1; | |
568 | } | |
569 | ||
570 | /* | |
571 | * Send file descriptor to consumer via sock. | |
572 | */ | |
f50f23d9 | 573 | int consumer_send_fds(struct consumer_socket *sock, int *fds, size_t nb_fd) |
00e2e675 DG |
574 | { |
575 | int ret; | |
576 | ||
577 | assert(fds); | |
f50f23d9 | 578 | assert(sock); |
00e2e675 DG |
579 | assert(nb_fd > 0); |
580 | ||
f50f23d9 | 581 | ret = lttcomm_send_fds_unix_sock(sock->fd, fds, nb_fd); |
00e2e675 | 582 | if (ret < 0) { |
3448e266 DG |
583 | /* The above call will print a PERROR on error. */ |
584 | DBG("Error when sending consumer fds on sock %d", sock->fd); | |
00e2e675 DG |
585 | goto error; |
586 | } | |
587 | ||
f50f23d9 DG |
588 | ret = consumer_recv_status_reply(sock); |
589 | ||
00e2e675 DG |
590 | error: |
591 | return ret; | |
592 | } | |
593 | ||
ffe60014 DG |
594 | /* |
595 | * Consumer send communication message structure to consumer. | |
596 | */ | |
597 | int consumer_send_msg(struct consumer_socket *sock, | |
598 | struct lttcomm_consumer_msg *msg) | |
599 | { | |
600 | int ret; | |
601 | ||
602 | assert(msg); | |
603 | assert(sock); | |
604 | assert(sock->fd >= 0); | |
605 | ||
606 | ret = lttcomm_send_unix_sock(sock->fd, msg, | |
607 | sizeof(struct lttcomm_consumer_msg)); | |
608 | if (ret < 0) { | |
609 | /* The above call will print a PERROR on error. */ | |
610 | DBG("Error when sending consumer channel on sock %d", sock->fd); | |
611 | goto error; | |
612 | } | |
613 | ||
614 | ret = consumer_recv_status_reply(sock); | |
615 | ||
616 | error: | |
617 | return ret; | |
618 | } | |
619 | ||
00e2e675 DG |
620 | /* |
621 | * Consumer send channel communication message structure to consumer. | |
622 | */ | |
f50f23d9 DG |
623 | int consumer_send_channel(struct consumer_socket *sock, |
624 | struct lttcomm_consumer_msg *msg) | |
00e2e675 DG |
625 | { |
626 | int ret; | |
627 | ||
628 | assert(msg); | |
f50f23d9 DG |
629 | assert(sock); |
630 | assert(sock->fd >= 0); | |
00e2e675 | 631 | |
f50f23d9 | 632 | ret = lttcomm_send_unix_sock(sock->fd, msg, |
00e2e675 DG |
633 | sizeof(struct lttcomm_consumer_msg)); |
634 | if (ret < 0) { | |
3448e266 DG |
635 | /* The above call will print a PERROR on error. */ |
636 | DBG("Error when sending consumer channel on sock %d", sock->fd); | |
00e2e675 DG |
637 | goto error; |
638 | } | |
639 | ||
f50f23d9 DG |
640 | ret = consumer_recv_status_reply(sock); |
641 | ||
00e2e675 DG |
642 | error: |
643 | return ret; | |
644 | } | |
645 | ||
ffe60014 DG |
646 | /* |
647 | * Populate the given consumer msg structure with the ask_channel command | |
648 | * information. | |
649 | */ | |
650 | void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg *msg, | |
651 | uint64_t subbuf_size, | |
652 | uint64_t num_subbuf, | |
653 | int overwrite, | |
654 | unsigned int switch_timer_interval, | |
655 | unsigned int read_timer_interval, | |
656 | int output, | |
657 | int type, | |
658 | uint64_t session_id, | |
659 | const char *pathname, | |
660 | const char *name, | |
661 | uid_t uid, | |
662 | gid_t gid, | |
d88aee68 DG |
663 | uint64_t relayd_id, |
664 | uint64_t key, | |
7972aab2 | 665 | unsigned char *uuid, |
1624d5b7 JD |
666 | uint32_t chan_id, |
667 | uint64_t tracefile_size, | |
668 | uint64_t tracefile_count) | |
ffe60014 DG |
669 | { |
670 | assert(msg); | |
671 | ||
672 | /* Zeroed structure */ | |
673 | memset(msg, 0, sizeof(struct lttcomm_consumer_msg)); | |
674 | ||
675 | msg->cmd_type = LTTNG_CONSUMER_ASK_CHANNEL_CREATION; | |
676 | msg->u.ask_channel.subbuf_size = subbuf_size; | |
677 | msg->u.ask_channel.num_subbuf = num_subbuf ; | |
678 | msg->u.ask_channel.overwrite = overwrite; | |
679 | msg->u.ask_channel.switch_timer_interval = switch_timer_interval; | |
680 | msg->u.ask_channel.read_timer_interval = read_timer_interval; | |
681 | msg->u.ask_channel.output = output; | |
682 | msg->u.ask_channel.type = type; | |
683 | msg->u.ask_channel.session_id = session_id; | |
684 | msg->u.ask_channel.uid = uid; | |
685 | msg->u.ask_channel.gid = gid; | |
686 | msg->u.ask_channel.relayd_id = relayd_id; | |
687 | msg->u.ask_channel.key = key; | |
7972aab2 | 688 | msg->u.ask_channel.chan_id = chan_id; |
1624d5b7 JD |
689 | msg->u.ask_channel.tracefile_size = tracefile_size; |
690 | msg->u.ask_channel.tracefile_count = tracefile_count; | |
ffe60014 DG |
691 | |
692 | memcpy(msg->u.ask_channel.uuid, uuid, sizeof(msg->u.ask_channel.uuid)); | |
693 | ||
694 | strncpy(msg->u.ask_channel.pathname, pathname, | |
695 | sizeof(msg->u.ask_channel.pathname)); | |
696 | msg->u.ask_channel.pathname[sizeof(msg->u.ask_channel.pathname)-1] = '\0'; | |
697 | ||
698 | strncpy(msg->u.ask_channel.name, name, sizeof(msg->u.ask_channel.name)); | |
699 | msg->u.ask_channel.name[sizeof(msg->u.ask_channel.name) - 1] = '\0'; | |
700 | } | |
701 | ||
00e2e675 DG |
702 | /* |
703 | * Init channel communication message structure. | |
704 | */ | |
705 | void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg *msg, | |
706 | enum lttng_consumer_command cmd, | |
d88aee68 | 707 | uint64_t channel_key, |
ffe60014 DG |
708 | uint64_t session_id, |
709 | const char *pathname, | |
710 | uid_t uid, | |
711 | gid_t gid, | |
d88aee68 | 712 | uint64_t relayd_id, |
c30aaa51 | 713 | const char *name, |
ffe60014 DG |
714 | unsigned int nb_init_streams, |
715 | enum lttng_event_output output, | |
1624d5b7 JD |
716 | int type, |
717 | uint64_t tracefile_size, | |
718 | uint64_t tracefile_count) | |
00e2e675 DG |
719 | { |
720 | assert(msg); | |
721 | ||
00e2e675 DG |
722 | /* Zeroed structure */ |
723 | memset(msg, 0, sizeof(struct lttcomm_consumer_msg)); | |
724 | ||
725 | /* Send channel */ | |
726 | msg->cmd_type = cmd; | |
727 | msg->u.channel.channel_key = channel_key; | |
ffe60014 DG |
728 | msg->u.channel.session_id = session_id; |
729 | msg->u.channel.uid = uid; | |
730 | msg->u.channel.gid = gid; | |
731 | msg->u.channel.relayd_id = relayd_id; | |
c30aaa51 | 732 | msg->u.channel.nb_init_streams = nb_init_streams; |
ffe60014 DG |
733 | msg->u.channel.output = output; |
734 | msg->u.channel.type = type; | |
1624d5b7 JD |
735 | msg->u.channel.tracefile_size = tracefile_size; |
736 | msg->u.channel.tracefile_count = tracefile_count; | |
ffe60014 DG |
737 | |
738 | strncpy(msg->u.channel.pathname, pathname, | |
739 | sizeof(msg->u.channel.pathname)); | |
740 | msg->u.channel.pathname[sizeof(msg->u.channel.pathname) - 1] = '\0'; | |
741 | ||
742 | strncpy(msg->u.channel.name, name, sizeof(msg->u.channel.name)); | |
743 | msg->u.channel.name[sizeof(msg->u.channel.name) - 1] = '\0'; | |
00e2e675 DG |
744 | } |
745 | ||
746 | /* | |
747 | * Init stream communication message structure. | |
748 | */ | |
749 | void consumer_init_stream_comm_msg(struct lttcomm_consumer_msg *msg, | |
750 | enum lttng_consumer_command cmd, | |
d88aee68 DG |
751 | uint64_t channel_key, |
752 | uint64_t stream_key, | |
ffe60014 | 753 | int cpu) |
00e2e675 DG |
754 | { |
755 | assert(msg); | |
756 | ||
757 | memset(msg, 0, sizeof(struct lttcomm_consumer_msg)); | |
758 | ||
00e2e675 DG |
759 | msg->cmd_type = cmd; |
760 | msg->u.stream.channel_key = channel_key; | |
761 | msg->u.stream.stream_key = stream_key; | |
ffe60014 | 762 | msg->u.stream.cpu = cpu; |
00e2e675 DG |
763 | } |
764 | ||
765 | /* | |
766 | * Send stream communication structure to the consumer. | |
767 | */ | |
f50f23d9 DG |
768 | int consumer_send_stream(struct consumer_socket *sock, |
769 | struct consumer_output *dst, struct lttcomm_consumer_msg *msg, | |
770 | int *fds, size_t nb_fd) | |
00e2e675 DG |
771 | { |
772 | int ret; | |
773 | ||
774 | assert(msg); | |
775 | assert(dst); | |
f50f23d9 | 776 | assert(sock); |
ffe60014 | 777 | assert(fds); |
00e2e675 DG |
778 | |
779 | /* Send on socket */ | |
f50f23d9 | 780 | ret = lttcomm_send_unix_sock(sock->fd, msg, |
00e2e675 DG |
781 | sizeof(struct lttcomm_consumer_msg)); |
782 | if (ret < 0) { | |
3448e266 DG |
783 | /* The above call will print a PERROR on error. */ |
784 | DBG("Error when sending consumer stream on sock %d", sock->fd); | |
00e2e675 DG |
785 | goto error; |
786 | } | |
787 | ||
f50f23d9 DG |
788 | ret = consumer_recv_status_reply(sock); |
789 | if (ret < 0) { | |
790 | goto error; | |
791 | } | |
792 | ||
00e2e675 DG |
793 | ret = consumer_send_fds(sock, fds, nb_fd); |
794 | if (ret < 0) { | |
795 | goto error; | |
796 | } | |
797 | ||
798 | error: | |
799 | return ret; | |
800 | } | |
37278a1e DG |
801 | |
802 | /* | |
803 | * Send relayd socket to consumer associated with a session name. | |
804 | * | |
805 | * On success return positive value. On error, negative value. | |
806 | */ | |
f50f23d9 | 807 | int consumer_send_relayd_socket(struct consumer_socket *consumer_sock, |
6151a90f | 808 | struct lttcomm_relayd_sock *rsock, struct consumer_output *consumer, |
d88aee68 | 809 | enum lttng_stream_type type, uint64_t session_id) |
37278a1e DG |
810 | { |
811 | int ret; | |
812 | struct lttcomm_consumer_msg msg; | |
813 | ||
814 | /* Code flow error. Safety net. */ | |
6151a90f | 815 | assert(rsock); |
37278a1e | 816 | assert(consumer); |
f50f23d9 | 817 | assert(consumer_sock); |
37278a1e DG |
818 | |
819 | /* Bail out if consumer is disabled */ | |
820 | if (!consumer->enabled) { | |
f73fabfd | 821 | ret = LTTNG_OK; |
37278a1e DG |
822 | goto error; |
823 | } | |
824 | ||
825 | msg.cmd_type = LTTNG_CONSUMER_ADD_RELAYD_SOCKET; | |
826 | /* | |
827 | * Assign network consumer output index using the temporary consumer since | |
828 | * this call should only be made from within a set_consumer_uri() function | |
829 | * call in the session daemon. | |
830 | */ | |
831 | msg.u.relayd_sock.net_index = consumer->net_seq_index; | |
832 | msg.u.relayd_sock.type = type; | |
46e6455f | 833 | msg.u.relayd_sock.session_id = session_id; |
6151a90f | 834 | memcpy(&msg.u.relayd_sock.sock, rsock, sizeof(msg.u.relayd_sock.sock)); |
37278a1e | 835 | |
f50f23d9 DG |
836 | DBG3("Sending relayd sock info to consumer on %d", consumer_sock->fd); |
837 | ret = lttcomm_send_unix_sock(consumer_sock->fd, &msg, sizeof(msg)); | |
37278a1e | 838 | if (ret < 0) { |
3448e266 | 839 | /* The above call will print a PERROR on error. */ |
6151a90f | 840 | DBG("Error when sending relayd sockets on sock %d", rsock->sock.fd); |
37278a1e DG |
841 | goto error; |
842 | } | |
843 | ||
f50f23d9 DG |
844 | ret = consumer_recv_status_reply(consumer_sock); |
845 | if (ret < 0) { | |
846 | goto error; | |
847 | } | |
848 | ||
37278a1e | 849 | DBG3("Sending relayd socket file descriptor to consumer"); |
6151a90f | 850 | ret = consumer_send_fds(consumer_sock, &rsock->sock.fd, 1); |
37278a1e DG |
851 | if (ret < 0) { |
852 | goto error; | |
853 | } | |
854 | ||
855 | DBG2("Consumer relayd socket sent"); | |
856 | ||
857 | error: | |
858 | return ret; | |
859 | } | |
173af62f DG |
860 | |
861 | /* | |
2f77fc4b DG |
862 | * Set consumer subdirectory using the session name and a generated datetime if |
863 | * needed. This is appended to the current subdirectory. | |
173af62f | 864 | */ |
2f77fc4b DG |
865 | int consumer_set_subdir(struct consumer_output *consumer, |
866 | const char *session_name) | |
173af62f | 867 | { |
2f77fc4b DG |
868 | int ret = 0; |
869 | unsigned int have_default_name = 0; | |
870 | char datetime[16], tmp_path[PATH_MAX]; | |
871 | time_t rawtime; | |
872 | struct tm *timeinfo; | |
173af62f DG |
873 | |
874 | assert(consumer); | |
2f77fc4b DG |
875 | assert(session_name); |
876 | ||
877 | memset(tmp_path, 0, sizeof(tmp_path)); | |
878 | ||
879 | /* Flag if we have a default session. */ | |
880 | if (strncmp(session_name, DEFAULT_SESSION_NAME "-", | |
881 | strlen(DEFAULT_SESSION_NAME) + 1) == 0) { | |
882 | have_default_name = 1; | |
883 | } else { | |
884 | /* Get date and time for session path */ | |
885 | time(&rawtime); | |
886 | timeinfo = localtime(&rawtime); | |
887 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
173af62f DG |
888 | } |
889 | ||
2f77fc4b DG |
890 | if (have_default_name) { |
891 | ret = snprintf(tmp_path, sizeof(tmp_path), | |
892 | "%s/%s", consumer->subdir, session_name); | |
893 | } else { | |
894 | ret = snprintf(tmp_path, sizeof(tmp_path), | |
895 | "%s/%s-%s/", consumer->subdir, session_name, datetime); | |
896 | } | |
173af62f | 897 | if (ret < 0) { |
2f77fc4b | 898 | PERROR("snprintf session name date"); |
173af62f DG |
899 | goto error; |
900 | } | |
901 | ||
2f77fc4b DG |
902 | strncpy(consumer->subdir, tmp_path, sizeof(consumer->subdir)); |
903 | DBG2("Consumer subdir set to %s", consumer->subdir); | |
173af62f DG |
904 | |
905 | error: | |
906 | return ret; | |
907 | } | |
806e2684 DG |
908 | |
909 | /* | |
6d805429 | 910 | * Ask the consumer if the data is ready to read (NOT pending) for the specific |
806e2684 DG |
911 | * session id. |
912 | * | |
913 | * This function has a different behavior with the consumer i.e. that it waits | |
6d805429 | 914 | * for a reply from the consumer if yes or no the data is pending. |
806e2684 | 915 | */ |
d88aee68 | 916 | int consumer_is_data_pending(uint64_t session_id, |
806e2684 DG |
917 | struct consumer_output *consumer) |
918 | { | |
919 | int ret; | |
6d805429 | 920 | int32_t ret_code = 0; /* Default is that the data is NOT pending */ |
806e2684 DG |
921 | struct consumer_socket *socket; |
922 | struct lttng_ht_iter iter; | |
923 | struct lttcomm_consumer_msg msg; | |
924 | ||
925 | assert(consumer); | |
926 | ||
6d805429 | 927 | msg.cmd_type = LTTNG_CONSUMER_DATA_PENDING; |
806e2684 | 928 | |
d88aee68 | 929 | msg.u.data_pending.session_id = session_id; |
806e2684 | 930 | |
d88aee68 | 931 | DBG3("Consumer data pending for id %" PRIu64, session_id); |
806e2684 | 932 | |
c8f59ee5 | 933 | /* Send command for each consumer */ |
b82c5c4d | 934 | rcu_read_lock(); |
806e2684 DG |
935 | cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket, |
936 | node.node) { | |
937 | /* Code flow error */ | |
938 | assert(socket->fd >= 0); | |
939 | ||
940 | pthread_mutex_lock(socket->lock); | |
941 | ||
942 | ret = lttcomm_send_unix_sock(socket->fd, &msg, sizeof(msg)); | |
943 | if (ret < 0) { | |
3448e266 DG |
944 | /* The above call will print a PERROR on error. */ |
945 | DBG("Error on consumer is data pending on sock %d", socket->fd); | |
806e2684 | 946 | pthread_mutex_unlock(socket->lock); |
b82c5c4d | 947 | goto error_unlock; |
806e2684 DG |
948 | } |
949 | ||
f50f23d9 DG |
950 | /* |
951 | * No need for a recv reply status because the answer to the command is | |
952 | * the reply status message. | |
953 | */ | |
954 | ||
806e2684 | 955 | ret = lttcomm_recv_unix_sock(socket->fd, &ret_code, sizeof(ret_code)); |
a6cd2b97 DG |
956 | if (ret <= 0) { |
957 | if (ret == 0) { | |
958 | /* Orderly shutdown. Don't return 0 which means success. */ | |
959 | ret = -1; | |
960 | } | |
3448e266 DG |
961 | /* The above call will print a PERROR on error. */ |
962 | DBG("Error on recv consumer is data pending on sock %d", socket->fd); | |
806e2684 | 963 | pthread_mutex_unlock(socket->lock); |
b82c5c4d | 964 | goto error_unlock; |
806e2684 DG |
965 | } |
966 | ||
967 | pthread_mutex_unlock(socket->lock); | |
968 | ||
6d805429 | 969 | if (ret_code == 1) { |
806e2684 DG |
970 | break; |
971 | } | |
972 | } | |
b82c5c4d | 973 | rcu_read_unlock(); |
806e2684 | 974 | |
d88aee68 DG |
975 | DBG("Consumer data is %s pending for session id %" PRIu64, |
976 | ret_code == 1 ? "" : "NOT", session_id); | |
806e2684 DG |
977 | return ret_code; |
978 | ||
b82c5c4d DG |
979 | error_unlock: |
980 | rcu_read_unlock(); | |
806e2684 DG |
981 | return -1; |
982 | } | |
7972aab2 DG |
983 | |
984 | /* | |
985 | * Send a flush command to consumer using the given channel key. | |
986 | * | |
987 | * Return 0 on success else a negative value. | |
988 | */ | |
989 | int consumer_flush_channel(struct consumer_socket *socket, uint64_t key) | |
990 | { | |
991 | int ret; | |
992 | struct lttcomm_consumer_msg msg; | |
993 | ||
994 | assert(socket); | |
995 | assert(socket->fd >= 0); | |
996 | ||
997 | DBG2("Consumer flush channel key %" PRIu64, key); | |
998 | ||
999 | msg.cmd_type = LTTNG_CONSUMER_FLUSH_CHANNEL; | |
1000 | msg.u.flush_channel.key = key; | |
1001 | ||
1002 | pthread_mutex_lock(socket->lock); | |
1003 | health_code_update(); | |
1004 | ||
1005 | ret = consumer_send_msg(socket, &msg); | |
1006 | if (ret < 0) { | |
1007 | goto end; | |
1008 | } | |
1009 | ||
1010 | end: | |
1011 | health_code_update(); | |
1012 | pthread_mutex_unlock(socket->lock); | |
1013 | return ret; | |
1014 | } | |
1015 | ||
1016 | /* | |
1017 | * Send a close metdata command to consumer using the given channel key. | |
1018 | * | |
1019 | * Return 0 on success else a negative value. | |
1020 | */ | |
1021 | int consumer_close_metadata(struct consumer_socket *socket, | |
1022 | uint64_t metadata_key) | |
1023 | { | |
1024 | int ret; | |
1025 | struct lttcomm_consumer_msg msg; | |
1026 | ||
1027 | assert(socket); | |
1028 | assert(socket->fd >= 0); | |
1029 | ||
1030 | DBG2("Consumer close metadata channel key %" PRIu64, metadata_key); | |
1031 | ||
1032 | msg.cmd_type = LTTNG_CONSUMER_CLOSE_METADATA; | |
1033 | msg.u.close_metadata.key = metadata_key; | |
1034 | ||
1035 | pthread_mutex_lock(socket->lock); | |
1036 | health_code_update(); | |
1037 | ||
1038 | ret = consumer_send_msg(socket, &msg); | |
1039 | if (ret < 0) { | |
1040 | goto end; | |
1041 | } | |
1042 | ||
1043 | end: | |
1044 | health_code_update(); | |
1045 | pthread_mutex_unlock(socket->lock); | |
1046 | return ret; | |
1047 | } | |
1048 | ||
1049 | /* | |
1050 | * Send a setup metdata command to consumer using the given channel key. | |
1051 | * | |
1052 | * Return 0 on success else a negative value. | |
1053 | */ | |
1054 | int consumer_setup_metadata(struct consumer_socket *socket, | |
1055 | uint64_t metadata_key) | |
1056 | { | |
1057 | int ret; | |
1058 | struct lttcomm_consumer_msg msg; | |
1059 | ||
1060 | assert(socket); | |
1061 | assert(socket->fd >= 0); | |
1062 | ||
1063 | DBG2("Consumer setup metadata channel key %" PRIu64, metadata_key); | |
1064 | ||
1065 | msg.cmd_type = LTTNG_CONSUMER_SETUP_METADATA; | |
1066 | msg.u.setup_metadata.key = metadata_key; | |
1067 | ||
1068 | pthread_mutex_lock(socket->lock); | |
1069 | health_code_update(); | |
1070 | ||
1071 | ret = consumer_send_msg(socket, &msg); | |
1072 | if (ret < 0) { | |
1073 | goto end; | |
1074 | } | |
1075 | ||
1076 | end: | |
1077 | health_code_update(); | |
1078 | pthread_mutex_unlock(socket->lock); | |
1079 | return ret; | |
1080 | } | |
1081 | ||
1082 | /* | |
331744e3 | 1083 | * Send metadata string to consumer. Socket lock MUST be acquired. |
7972aab2 DG |
1084 | * |
1085 | * Return 0 on success else a negative value. | |
1086 | */ | |
1087 | int consumer_push_metadata(struct consumer_socket *socket, | |
1088 | uint64_t metadata_key, char *metadata_str, size_t len, | |
1089 | size_t target_offset) | |
1090 | { | |
1091 | int ret; | |
1092 | struct lttcomm_consumer_msg msg; | |
1093 | ||
1094 | assert(socket); | |
1095 | assert(socket->fd >= 0); | |
1096 | ||
1097 | DBG2("Consumer push metadata to consumer socket %d", socket->fd); | |
1098 | ||
1099 | msg.cmd_type = LTTNG_CONSUMER_PUSH_METADATA; | |
1100 | msg.u.push_metadata.key = metadata_key; | |
1101 | msg.u.push_metadata.target_offset = target_offset; | |
1102 | msg.u.push_metadata.len = len; | |
1103 | ||
7972aab2 DG |
1104 | health_code_update(); |
1105 | ret = consumer_send_msg(socket, &msg); | |
331744e3 | 1106 | if (ret < 0 || len == 0) { |
7972aab2 DG |
1107 | goto end; |
1108 | } | |
1109 | ||
1110 | DBG3("Consumer pushing metadata on sock %d of len %lu", socket->fd, len); | |
1111 | ||
1112 | ret = lttcomm_send_unix_sock(socket->fd, metadata_str, len); | |
1113 | if (ret < 0) { | |
1114 | goto end; | |
1115 | } | |
1116 | ||
1117 | health_code_update(); | |
1118 | ret = consumer_recv_status_reply(socket); | |
1119 | if (ret < 0) { | |
1120 | goto end; | |
1121 | } | |
1122 | ||
1123 | end: | |
1124 | health_code_update(); | |
7972aab2 DG |
1125 | return ret; |
1126 | } |