5906cdca5901358fd339cf24f6de366eb99d7369
[lttng-tools.git] / src / bin / lttng-sessiond / consumer.c
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 _LGPL_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>
26 #include <inttypes.h>
27
28 #include <common/common.h>
29 #include <common/defaults.h>
30 #include <common/uri.h>
31 #include <common/relayd/relayd.h>
32
33 #include "consumer.h"
34 #include "health-sessiond.h"
35 #include "ust-app.h"
36 #include "utils.h"
37
38 /*
39 * Send a data payload using a given consumer socket of size len.
40 *
41 * The consumer socket lock MUST be acquired before calling this since this
42 * function can change the fd value.
43 *
44 * Return 0 on success else a negative value on error.
45 */
46 int consumer_socket_send(struct consumer_socket *socket, void *msg, size_t len)
47 {
48 int fd;
49 ssize_t size;
50
51 assert(socket);
52 assert(socket->fd_ptr);
53 assert(msg);
54
55 /* Consumer socket is invalid. Stopping. */
56 fd = *socket->fd_ptr;
57 if (fd < 0) {
58 goto error;
59 }
60
61 size = lttcomm_send_unix_sock(fd, msg, len);
62 if (size < 0) {
63 /* The above call will print a PERROR on error. */
64 DBG("Error when sending data to consumer on sock %d", fd);
65 /*
66 * At this point, the socket is not usable anymore thus closing it and
67 * setting the file descriptor to -1 so it is not reused.
68 */
69
70 /* This call will PERROR on error. */
71 (void) lttcomm_close_unix_sock(fd);
72 *socket->fd_ptr = -1;
73 goto error;
74 }
75
76 return 0;
77
78 error:
79 return -1;
80 }
81
82 /*
83 * Receive a data payload using a given consumer socket of size len.
84 *
85 * The consumer socket lock MUST be acquired before calling this since this
86 * function can change the fd value.
87 *
88 * Return 0 on success else a negative value on error.
89 */
90 int consumer_socket_recv(struct consumer_socket *socket, void *msg, size_t len)
91 {
92 int fd;
93 ssize_t size;
94
95 assert(socket);
96 assert(socket->fd_ptr);
97 assert(msg);
98
99 /* Consumer socket is invalid. Stopping. */
100 fd = *socket->fd_ptr;
101 if (fd < 0) {
102 goto error;
103 }
104
105 size = lttcomm_recv_unix_sock(fd, msg, len);
106 if (size <= 0) {
107 /* The above call will print a PERROR on error. */
108 DBG("Error when receiving data from the consumer socket %d", fd);
109 /*
110 * At this point, the socket is not usable anymore thus closing it and
111 * setting the file descriptor to -1 so it is not reused.
112 */
113
114 /* This call will PERROR on error. */
115 (void) lttcomm_close_unix_sock(fd);
116 *socket->fd_ptr = -1;
117 goto error;
118 }
119
120 return 0;
121
122 error:
123 return -1;
124 }
125
126 /*
127 * Receive a reply command status message from the consumer. Consumer socket
128 * lock MUST be acquired before calling this function.
129 *
130 * Return 0 on success, -1 on recv error or a negative lttng error code which
131 * was possibly returned by the consumer.
132 */
133 int consumer_recv_status_reply(struct consumer_socket *sock)
134 {
135 int ret;
136 struct lttcomm_consumer_status_msg reply;
137
138 assert(sock);
139
140 ret = consumer_socket_recv(sock, &reply, sizeof(reply));
141 if (ret < 0) {
142 goto end;
143 }
144
145 if (reply.ret_code == LTTCOMM_CONSUMERD_SUCCESS) {
146 /* All good. */
147 ret = 0;
148 } else {
149 ret = -reply.ret_code;
150 DBG("Consumer ret code %d", ret);
151 }
152
153 end:
154 return ret;
155 }
156
157 /*
158 * Once the ASK_CHANNEL command is sent to the consumer, the channel
159 * information are sent back. This call receives that data and populates key
160 * and stream_count.
161 *
162 * On success return 0 and both key and stream_count are set. On error, a
163 * negative value is sent back and both parameters are untouched.
164 */
165 int consumer_recv_status_channel(struct consumer_socket *sock,
166 uint64_t *key, unsigned int *stream_count)
167 {
168 int ret;
169 struct lttcomm_consumer_status_channel reply;
170
171 assert(sock);
172 assert(stream_count);
173 assert(key);
174
175 ret = consumer_socket_recv(sock, &reply, sizeof(reply));
176 if (ret < 0) {
177 goto end;
178 }
179
180 /* An error is possible so don't touch the key and stream_count. */
181 if (reply.ret_code != LTTCOMM_CONSUMERD_SUCCESS) {
182 ret = -1;
183 goto end;
184 }
185
186 *key = reply.key;
187 *stream_count = reply.stream_count;
188 ret = 0;
189
190 end:
191 return ret;
192 }
193
194 /*
195 * Send destroy relayd command to consumer.
196 *
197 * On success return positive value. On error, negative value.
198 */
199 int consumer_send_destroy_relayd(struct consumer_socket *sock,
200 struct consumer_output *consumer)
201 {
202 int ret;
203 struct lttcomm_consumer_msg msg;
204
205 assert(consumer);
206 assert(sock);
207
208 DBG2("Sending destroy relayd command to consumer sock %d", *sock->fd_ptr);
209
210 memset(&msg, 0, sizeof(msg));
211 msg.cmd_type = LTTNG_CONSUMER_DESTROY_RELAYD;
212 msg.u.destroy_relayd.net_seq_idx = consumer->net_seq_index;
213
214 pthread_mutex_lock(sock->lock);
215 ret = consumer_socket_send(sock, &msg, sizeof(msg));
216 if (ret < 0) {
217 goto error;
218 }
219
220 /* Don't check the return value. The caller will do it. */
221 ret = consumer_recv_status_reply(sock);
222
223 DBG2("Consumer send destroy relayd command done");
224
225 error:
226 pthread_mutex_unlock(sock->lock);
227 return ret;
228 }
229
230 /*
231 * For each consumer socket in the consumer output object, send a destroy
232 * relayd command.
233 */
234 void consumer_output_send_destroy_relayd(struct consumer_output *consumer)
235 {
236 struct lttng_ht_iter iter;
237 struct consumer_socket *socket;
238
239 assert(consumer);
240
241 /* Destroy any relayd connection */
242 if (consumer->type == CONSUMER_DST_NET) {
243 rcu_read_lock();
244 cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket,
245 node.node) {
246 int ret;
247
248 /* Send destroy relayd command */
249 ret = consumer_send_destroy_relayd(socket, consumer);
250 if (ret < 0) {
251 DBG("Unable to send destroy relayd command to consumer");
252 /* Continue since we MUST delete everything at this point. */
253 }
254 }
255 rcu_read_unlock();
256 }
257 }
258
259 /*
260 * From a consumer_data structure, allocate and add a consumer socket to the
261 * consumer output.
262 *
263 * Return 0 on success, else negative value on error
264 */
265 int consumer_create_socket(struct consumer_data *data,
266 struct consumer_output *output)
267 {
268 int ret = 0;
269 struct consumer_socket *socket;
270
271 assert(data);
272
273 if (output == NULL || data->cmd_sock < 0) {
274 /*
275 * Not an error. Possible there is simply not spawned consumer or it's
276 * disabled for the tracing session asking the socket.
277 */
278 goto error;
279 }
280
281 rcu_read_lock();
282 socket = consumer_find_socket(data->cmd_sock, output);
283 rcu_read_unlock();
284 if (socket == NULL) {
285 socket = consumer_allocate_socket(&data->cmd_sock);
286 if (socket == NULL) {
287 ret = -1;
288 goto error;
289 }
290
291 socket->registered = 0;
292 socket->lock = &data->lock;
293 rcu_read_lock();
294 consumer_add_socket(socket, output);
295 rcu_read_unlock();
296 }
297
298 socket->type = data->type;
299
300 DBG3("Consumer socket created (fd: %d) and added to output",
301 data->cmd_sock);
302
303 error:
304 return ret;
305 }
306
307 /*
308 * Return the consumer socket from the given consumer output with the right
309 * bitness. On error, returns NULL.
310 *
311 * The caller MUST acquire a rcu read side lock and keep it until the socket
312 * object reference is not needed anymore.
313 */
314 struct consumer_socket *consumer_find_socket_by_bitness(int bits,
315 struct consumer_output *consumer)
316 {
317 int consumer_fd;
318 struct consumer_socket *socket = NULL;
319
320 switch (bits) {
321 case 64:
322 consumer_fd = uatomic_read(&ust_consumerd64_fd);
323 break;
324 case 32:
325 consumer_fd = uatomic_read(&ust_consumerd32_fd);
326 break;
327 default:
328 assert(0);
329 goto end;
330 }
331
332 socket = consumer_find_socket(consumer_fd, consumer);
333 if (!socket) {
334 ERR("Consumer socket fd %d not found in consumer obj %p",
335 consumer_fd, consumer);
336 }
337
338 end:
339 return socket;
340 }
341
342 /*
343 * Find a consumer_socket in a consumer_output hashtable. Read side lock must
344 * be acquired before calling this function and across use of the
345 * returned consumer_socket.
346 */
347 struct consumer_socket *consumer_find_socket(int key,
348 struct consumer_output *consumer)
349 {
350 struct lttng_ht_iter iter;
351 struct lttng_ht_node_ulong *node;
352 struct consumer_socket *socket = NULL;
353
354 /* Negative keys are lookup failures */
355 if (key < 0 || consumer == NULL) {
356 return NULL;
357 }
358
359 lttng_ht_lookup(consumer->socks, (void *)((unsigned long) key),
360 &iter);
361 node = lttng_ht_iter_get_node_ulong(&iter);
362 if (node != NULL) {
363 socket = caa_container_of(node, struct consumer_socket, node);
364 }
365
366 return socket;
367 }
368
369 /*
370 * Allocate a new consumer_socket and return the pointer.
371 */
372 struct consumer_socket *consumer_allocate_socket(int *fd)
373 {
374 struct consumer_socket *socket = NULL;
375
376 assert(fd);
377
378 socket = zmalloc(sizeof(struct consumer_socket));
379 if (socket == NULL) {
380 PERROR("zmalloc consumer socket");
381 goto error;
382 }
383
384 socket->fd_ptr = fd;
385 lttng_ht_node_init_ulong(&socket->node, *fd);
386
387 error:
388 return socket;
389 }
390
391 /*
392 * Add consumer socket to consumer output object. Read side lock must be
393 * acquired before calling this function.
394 */
395 void consumer_add_socket(struct consumer_socket *sock,
396 struct consumer_output *consumer)
397 {
398 assert(sock);
399 assert(consumer);
400
401 lttng_ht_add_unique_ulong(consumer->socks, &sock->node);
402 }
403
404 /*
405 * Delte consumer socket to consumer output object. Read side lock must be
406 * acquired before calling this function.
407 */
408 void consumer_del_socket(struct consumer_socket *sock,
409 struct consumer_output *consumer)
410 {
411 int ret;
412 struct lttng_ht_iter iter;
413
414 assert(sock);
415 assert(consumer);
416
417 iter.iter.node = &sock->node.node;
418 ret = lttng_ht_del(consumer->socks, &iter);
419 assert(!ret);
420 }
421
422 /*
423 * RCU destroy call function.
424 */
425 static void destroy_socket_rcu(struct rcu_head *head)
426 {
427 struct lttng_ht_node_ulong *node =
428 caa_container_of(head, struct lttng_ht_node_ulong, head);
429 struct consumer_socket *socket =
430 caa_container_of(node, struct consumer_socket, node);
431
432 free(socket);
433 }
434
435 /*
436 * Destroy and free socket pointer in a call RCU. Read side lock must be
437 * acquired before calling this function.
438 */
439 void consumer_destroy_socket(struct consumer_socket *sock)
440 {
441 assert(sock);
442
443 /*
444 * We DO NOT close the file descriptor here since it is global to the
445 * session daemon and is closed only if the consumer dies or a custom
446 * consumer was registered,
447 */
448 if (sock->registered) {
449 DBG3("Consumer socket was registered. Closing fd %d", *sock->fd_ptr);
450 lttcomm_close_unix_sock(*sock->fd_ptr);
451 }
452
453 call_rcu(&sock->node.head, destroy_socket_rcu);
454 }
455
456 /*
457 * Allocate and assign data to a consumer_output object.
458 *
459 * Return pointer to structure.
460 */
461 struct consumer_output *consumer_create_output(enum consumer_dst_type type)
462 {
463 struct consumer_output *output = NULL;
464
465 output = zmalloc(sizeof(struct consumer_output));
466 if (output == NULL) {
467 PERROR("zmalloc consumer_output");
468 goto error;
469 }
470
471 /* By default, consumer output is enabled */
472 output->enabled = 1;
473 output->type = type;
474 output->net_seq_index = (uint64_t) -1ULL;
475 urcu_ref_init(&output->ref);
476
477 output->socks = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
478
479 error:
480 return output;
481 }
482
483 /*
484 * Iterate over the consumer output socket hash table and destroy them. The
485 * socket file descriptor are only closed if the consumer output was
486 * registered meaning it's an external consumer.
487 */
488 void consumer_destroy_output_sockets(struct consumer_output *obj)
489 {
490 struct lttng_ht_iter iter;
491 struct consumer_socket *socket;
492
493 if (!obj->socks) {
494 return;
495 }
496
497 rcu_read_lock();
498 cds_lfht_for_each_entry(obj->socks->ht, &iter.iter, socket, node.node) {
499 consumer_del_socket(socket, obj);
500 consumer_destroy_socket(socket);
501 }
502 rcu_read_unlock();
503 }
504
505 /*
506 * Delete the consumer_output object from the list and free the ptr.
507 *
508 * Should *NOT* be called with RCU read-side lock held.
509 */
510 static void consumer_release_output(struct urcu_ref *ref)
511 {
512 struct consumer_output *obj =
513 caa_container_of(ref, struct consumer_output, ref);
514
515 consumer_destroy_output_sockets(obj);
516
517 if (obj->socks) {
518 /* Finally destroy HT */
519 ht_cleanup_push(obj->socks);
520 }
521
522 free(obj);
523 }
524
525 /*
526 * Get the consumer_output object.
527 */
528 void consumer_output_get(struct consumer_output *obj)
529 {
530 urcu_ref_get(&obj->ref);
531 }
532
533 /*
534 * Put the consumer_output object.
535 *
536 * Should *NOT* be called with RCU read-side lock held.
537 */
538 void consumer_output_put(struct consumer_output *obj)
539 {
540 if (!obj) {
541 return;
542 }
543 urcu_ref_put(&obj->ref, consumer_release_output);
544 }
545
546 /*
547 * Copy consumer output and returned the newly allocated copy.
548 *
549 * Should *NOT* be called with RCU read-side lock held.
550 */
551 struct consumer_output *consumer_copy_output(struct consumer_output *obj)
552 {
553 int ret;
554 struct consumer_output *output;
555
556 assert(obj);
557
558 output = consumer_create_output(obj->type);
559 if (output == NULL) {
560 goto end;
561 }
562 output->enabled = obj->enabled;
563 output->net_seq_index = obj->net_seq_index;
564 memcpy(output->subdir, obj->subdir, sizeof(output->subdir));
565 output->snapshot = obj->snapshot;
566 output->relay_major_version = obj->relay_major_version;
567 output->relay_minor_version = obj->relay_minor_version;
568 memcpy(&output->dst, &obj->dst, sizeof(output->dst));
569 ret = consumer_copy_sockets(output, obj);
570 if (ret < 0) {
571 goto error_put;
572 }
573 end:
574 return output;
575
576 error_put:
577 consumer_output_put(output);
578 return NULL;
579 }
580
581 /*
582 * Copy consumer sockets from src to dst.
583 *
584 * Return 0 on success or else a negative value.
585 */
586 int consumer_copy_sockets(struct consumer_output *dst,
587 struct consumer_output *src)
588 {
589 int ret = 0;
590 struct lttng_ht_iter iter;
591 struct consumer_socket *socket, *copy_sock;
592
593 assert(dst);
594 assert(src);
595
596 rcu_read_lock();
597 cds_lfht_for_each_entry(src->socks->ht, &iter.iter, socket, node.node) {
598 /* Ignore socket that are already there. */
599 copy_sock = consumer_find_socket(*socket->fd_ptr, dst);
600 if (copy_sock) {
601 continue;
602 }
603
604 /* Create new socket object. */
605 copy_sock = consumer_allocate_socket(socket->fd_ptr);
606 if (copy_sock == NULL) {
607 rcu_read_unlock();
608 ret = -ENOMEM;
609 goto error;
610 }
611
612 copy_sock->registered = socket->registered;
613 /*
614 * This is valid because this lock is shared accross all consumer
615 * object being the global lock of the consumer data structure of the
616 * session daemon.
617 */
618 copy_sock->lock = socket->lock;
619 consumer_add_socket(copy_sock, dst);
620 }
621 rcu_read_unlock();
622
623 error:
624 return ret;
625 }
626
627 /*
628 * Set network URI to the consumer output object.
629 *
630 * Return 0 on success. Return 1 if the URI were equal. Else, negative value on
631 * error.
632 */
633 int consumer_set_network_uri(struct consumer_output *obj,
634 struct lttng_uri *uri)
635 {
636 int ret;
637 char tmp_path[PATH_MAX];
638 char hostname[HOST_NAME_MAX];
639 struct lttng_uri *dst_uri = NULL;
640
641 /* Code flow error safety net. */
642 assert(obj);
643 assert(uri);
644
645 switch (uri->stype) {
646 case LTTNG_STREAM_CONTROL:
647 dst_uri = &obj->dst.net.control;
648 obj->dst.net.control_isset = 1;
649 if (uri->port == 0) {
650 /* Assign default port. */
651 uri->port = DEFAULT_NETWORK_CONTROL_PORT;
652 } else {
653 if (obj->dst.net.data_isset && uri->port ==
654 obj->dst.net.data.port) {
655 ret = -LTTNG_ERR_INVALID;
656 goto error;
657 }
658 }
659 DBG3("Consumer control URI set with port %d", uri->port);
660 break;
661 case LTTNG_STREAM_DATA:
662 dst_uri = &obj->dst.net.data;
663 obj->dst.net.data_isset = 1;
664 if (uri->port == 0) {
665 /* Assign default port. */
666 uri->port = DEFAULT_NETWORK_DATA_PORT;
667 } else {
668 if (obj->dst.net.control_isset && uri->port ==
669 obj->dst.net.control.port) {
670 ret = -LTTNG_ERR_INVALID;
671 goto error;
672 }
673 }
674 DBG3("Consumer data URI set with port %d", uri->port);
675 break;
676 default:
677 ERR("Set network uri type unknown %d", uri->stype);
678 ret = -LTTNG_ERR_INVALID;
679 goto error;
680 }
681
682 ret = uri_compare(dst_uri, uri);
683 if (!ret) {
684 /* Same URI, don't touch it and return success. */
685 DBG3("URI network compare are the same");
686 goto equal;
687 }
688
689 /* URIs were not equal, replacing it. */
690 memset(dst_uri, 0, sizeof(struct lttng_uri));
691 memcpy(dst_uri, uri, sizeof(struct lttng_uri));
692 obj->type = CONSUMER_DST_NET;
693
694 /* Handle subdir and add hostname in front. */
695 if (dst_uri->stype == LTTNG_STREAM_CONTROL) {
696 /* Get hostname to append it in the pathname */
697 ret = gethostname(hostname, sizeof(hostname));
698 if (ret < 0) {
699 PERROR("gethostname. Fallback on default localhost");
700 strncpy(hostname, "localhost", sizeof(hostname));
701 }
702 hostname[sizeof(hostname) - 1] = '\0';
703
704 /* Setup consumer subdir if none present in the control URI */
705 if (strlen(dst_uri->subdir) == 0) {
706 ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s",
707 hostname, obj->subdir);
708 } else {
709 ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s",
710 hostname, dst_uri->subdir);
711 }
712 if (ret < 0) {
713 PERROR("snprintf set consumer uri subdir");
714 ret = -LTTNG_ERR_NOMEM;
715 goto error;
716 }
717
718 if (lttng_strncpy(obj->dst.net.base_dir, tmp_path,
719 sizeof(obj->dst.net.base_dir))) {
720 ret = -LTTNG_ERR_INVALID;
721 goto error;
722 }
723 DBG3("Consumer set network uri base_dir path %s", tmp_path);
724 }
725
726 return 0;
727 equal:
728 return 1;
729 error:
730 return ret;
731 }
732
733 /*
734 * Send file descriptor to consumer via sock.
735 *
736 * The consumer socket lock must be held by the caller.
737 */
738 int consumer_send_fds(struct consumer_socket *sock, int *fds, size_t nb_fd)
739 {
740 int ret;
741
742 assert(fds);
743 assert(sock);
744 assert(nb_fd > 0);
745 assert(pthread_mutex_trylock(sock->lock) == EBUSY);
746
747 ret = lttcomm_send_fds_unix_sock(*sock->fd_ptr, fds, nb_fd);
748 if (ret < 0) {
749 /* The above call will print a PERROR on error. */
750 DBG("Error when sending consumer fds on sock %d", *sock->fd_ptr);
751 goto error;
752 }
753
754 ret = consumer_recv_status_reply(sock);
755 error:
756 return ret;
757 }
758
759 /*
760 * Consumer send communication message structure to consumer.
761 *
762 * The consumer socket lock must be held by the caller.
763 */
764 int consumer_send_msg(struct consumer_socket *sock,
765 struct lttcomm_consumer_msg *msg)
766 {
767 int ret;
768
769 assert(msg);
770 assert(sock);
771 assert(pthread_mutex_trylock(sock->lock) == EBUSY);
772
773 ret = consumer_socket_send(sock, msg, sizeof(struct lttcomm_consumer_msg));
774 if (ret < 0) {
775 goto error;
776 }
777
778 ret = consumer_recv_status_reply(sock);
779
780 error:
781 return ret;
782 }
783
784 /*
785 * Consumer send channel communication message structure to consumer.
786 *
787 * The consumer socket lock must be held by the caller.
788 */
789 int consumer_send_channel(struct consumer_socket *sock,
790 struct lttcomm_consumer_msg *msg)
791 {
792 int ret;
793
794 assert(msg);
795 assert(sock);
796
797 ret = consumer_send_msg(sock, msg);
798 if (ret < 0) {
799 goto error;
800 }
801
802 error:
803 return ret;
804 }
805
806 /*
807 * Populate the given consumer msg structure with the ask_channel command
808 * information.
809 */
810 void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg *msg,
811 uint64_t subbuf_size,
812 uint64_t num_subbuf,
813 int overwrite,
814 unsigned int switch_timer_interval,
815 unsigned int read_timer_interval,
816 unsigned int live_timer_interval,
817 unsigned int monitor_timer_interval,
818 int output,
819 int type,
820 uint64_t session_id,
821 const char *pathname,
822 const char *name,
823 uid_t uid,
824 gid_t gid,
825 uint64_t relayd_id,
826 uint64_t key,
827 unsigned char *uuid,
828 uint32_t chan_id,
829 uint64_t tracefile_size,
830 uint64_t tracefile_count,
831 uint64_t session_id_per_pid,
832 unsigned int monitor,
833 uint32_t ust_app_uid,
834 int64_t blocking_timeout,
835 const char *root_shm_path,
836 const char *shm_path)
837 {
838 assert(msg);
839
840 /* Zeroed structure */
841 memset(msg, 0, sizeof(struct lttcomm_consumer_msg));
842
843 msg->cmd_type = LTTNG_CONSUMER_ASK_CHANNEL_CREATION;
844 msg->u.ask_channel.subbuf_size = subbuf_size;
845 msg->u.ask_channel.num_subbuf = num_subbuf ;
846 msg->u.ask_channel.overwrite = overwrite;
847 msg->u.ask_channel.switch_timer_interval = switch_timer_interval;
848 msg->u.ask_channel.read_timer_interval = read_timer_interval;
849 msg->u.ask_channel.live_timer_interval = live_timer_interval;
850 msg->u.ask_channel.monitor_timer_interval = monitor_timer_interval;
851 msg->u.ask_channel.output = output;
852 msg->u.ask_channel.type = type;
853 msg->u.ask_channel.session_id = session_id;
854 msg->u.ask_channel.session_id_per_pid = session_id_per_pid;
855 msg->u.ask_channel.uid = uid;
856 msg->u.ask_channel.gid = gid;
857 msg->u.ask_channel.relayd_id = relayd_id;
858 msg->u.ask_channel.key = key;
859 msg->u.ask_channel.chan_id = chan_id;
860 msg->u.ask_channel.tracefile_size = tracefile_size;
861 msg->u.ask_channel.tracefile_count = tracefile_count;
862 msg->u.ask_channel.monitor = monitor;
863 msg->u.ask_channel.ust_app_uid = ust_app_uid;
864 msg->u.ask_channel.blocking_timeout = blocking_timeout;
865
866 memcpy(msg->u.ask_channel.uuid, uuid, sizeof(msg->u.ask_channel.uuid));
867
868 if (pathname) {
869 strncpy(msg->u.ask_channel.pathname, pathname,
870 sizeof(msg->u.ask_channel.pathname));
871 msg->u.ask_channel.pathname[sizeof(msg->u.ask_channel.pathname)-1] = '\0';
872 }
873
874 strncpy(msg->u.ask_channel.name, name, sizeof(msg->u.ask_channel.name));
875 msg->u.ask_channel.name[sizeof(msg->u.ask_channel.name) - 1] = '\0';
876
877 if (root_shm_path) {
878 strncpy(msg->u.ask_channel.root_shm_path, root_shm_path,
879 sizeof(msg->u.ask_channel.root_shm_path));
880 msg->u.ask_channel.root_shm_path[sizeof(msg->u.ask_channel.root_shm_path) - 1] = '\0';
881 }
882 if (shm_path) {
883 strncpy(msg->u.ask_channel.shm_path, shm_path,
884 sizeof(msg->u.ask_channel.shm_path));
885 msg->u.ask_channel.shm_path[sizeof(msg->u.ask_channel.shm_path) - 1] = '\0';
886 }
887 }
888
889 /*
890 * Init channel communication message structure.
891 */
892 void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg *msg,
893 enum lttng_consumer_command cmd,
894 uint64_t channel_key,
895 uint64_t session_id,
896 const char *pathname,
897 uid_t uid,
898 gid_t gid,
899 uint64_t relayd_id,
900 const char *name,
901 unsigned int nb_init_streams,
902 enum lttng_event_output output,
903 int type,
904 uint64_t tracefile_size,
905 uint64_t tracefile_count,
906 unsigned int monitor,
907 unsigned int live_timer_interval,
908 unsigned int monitor_timer_interval)
909 {
910 assert(msg);
911
912 /* Zeroed structure */
913 memset(msg, 0, sizeof(struct lttcomm_consumer_msg));
914
915 /* Send channel */
916 msg->cmd_type = cmd;
917 msg->u.channel.channel_key = channel_key;
918 msg->u.channel.session_id = session_id;
919 msg->u.channel.uid = uid;
920 msg->u.channel.gid = gid;
921 msg->u.channel.relayd_id = relayd_id;
922 msg->u.channel.nb_init_streams = nb_init_streams;
923 msg->u.channel.output = output;
924 msg->u.channel.type = type;
925 msg->u.channel.tracefile_size = tracefile_size;
926 msg->u.channel.tracefile_count = tracefile_count;
927 msg->u.channel.monitor = monitor;
928 msg->u.channel.live_timer_interval = live_timer_interval;
929 msg->u.channel.monitor_timer_interval = monitor_timer_interval;
930
931 strncpy(msg->u.channel.pathname, pathname,
932 sizeof(msg->u.channel.pathname));
933 msg->u.channel.pathname[sizeof(msg->u.channel.pathname) - 1] = '\0';
934
935 strncpy(msg->u.channel.name, name, sizeof(msg->u.channel.name));
936 msg->u.channel.name[sizeof(msg->u.channel.name) - 1] = '\0';
937 }
938
939 /*
940 * Init stream communication message structure.
941 */
942 void consumer_init_stream_comm_msg(struct lttcomm_consumer_msg *msg,
943 enum lttng_consumer_command cmd,
944 uint64_t channel_key,
945 uint64_t stream_key,
946 int cpu)
947 {
948 assert(msg);
949
950 memset(msg, 0, sizeof(struct lttcomm_consumer_msg));
951
952 msg->cmd_type = cmd;
953 msg->u.stream.channel_key = channel_key;
954 msg->u.stream.stream_key = stream_key;
955 msg->u.stream.cpu = cpu;
956 }
957
958 void consumer_init_streams_sent_comm_msg(struct lttcomm_consumer_msg *msg,
959 enum lttng_consumer_command cmd,
960 uint64_t channel_key, uint64_t net_seq_idx)
961 {
962 assert(msg);
963
964 memset(msg, 0, sizeof(struct lttcomm_consumer_msg));
965
966 msg->cmd_type = cmd;
967 msg->u.sent_streams.channel_key = channel_key;
968 msg->u.sent_streams.net_seq_idx = net_seq_idx;
969 }
970
971 /*
972 * Send stream communication structure to the consumer.
973 */
974 int consumer_send_stream(struct consumer_socket *sock,
975 struct consumer_output *dst, struct lttcomm_consumer_msg *msg,
976 int *fds, size_t nb_fd)
977 {
978 int ret;
979
980 assert(msg);
981 assert(dst);
982 assert(sock);
983 assert(fds);
984
985 ret = consumer_send_msg(sock, msg);
986 if (ret < 0) {
987 goto error;
988 }
989
990 ret = consumer_send_fds(sock, fds, nb_fd);
991 if (ret < 0) {
992 goto error;
993 }
994
995 error:
996 return ret;
997 }
998
999 /*
1000 * Send relayd socket to consumer associated with a session name.
1001 *
1002 * The consumer socket lock must be held by the caller.
1003 *
1004 * On success return positive value. On error, negative value.
1005 */
1006 int consumer_send_relayd_socket(struct consumer_socket *consumer_sock,
1007 struct lttcomm_relayd_sock *rsock, struct consumer_output *consumer,
1008 enum lttng_stream_type type, uint64_t session_id,
1009 char *session_name, char *hostname, int session_live_timer)
1010 {
1011 int ret;
1012 struct lttcomm_consumer_msg msg;
1013
1014 /* Code flow error. Safety net. */
1015 assert(rsock);
1016 assert(consumer);
1017 assert(consumer_sock);
1018
1019 memset(&msg, 0, sizeof(msg));
1020 /* Bail out if consumer is disabled */
1021 if (!consumer->enabled) {
1022 ret = LTTNG_OK;
1023 goto error;
1024 }
1025
1026 if (type == LTTNG_STREAM_CONTROL) {
1027 ret = relayd_create_session(rsock,
1028 &msg.u.relayd_sock.relayd_session_id,
1029 session_name, hostname, session_live_timer,
1030 consumer->snapshot);
1031 if (ret < 0) {
1032 /* Close the control socket. */
1033 (void) relayd_close(rsock);
1034 goto error;
1035 }
1036 }
1037
1038 msg.cmd_type = LTTNG_CONSUMER_ADD_RELAYD_SOCKET;
1039 /*
1040 * Assign network consumer output index using the temporary consumer since
1041 * this call should only be made from within a set_consumer_uri() function
1042 * call in the session daemon.
1043 */
1044 msg.u.relayd_sock.net_index = consumer->net_seq_index;
1045 msg.u.relayd_sock.type = type;
1046 msg.u.relayd_sock.session_id = session_id;
1047 memcpy(&msg.u.relayd_sock.sock, rsock, sizeof(msg.u.relayd_sock.sock));
1048
1049 DBG3("Sending relayd sock info to consumer on %d", *consumer_sock->fd_ptr);
1050 ret = consumer_send_msg(consumer_sock, &msg);
1051 if (ret < 0) {
1052 goto error;
1053 }
1054
1055 DBG3("Sending relayd socket file descriptor to consumer");
1056 ret = consumer_send_fds(consumer_sock, &rsock->sock.fd, 1);
1057 if (ret < 0) {
1058 goto error;
1059 }
1060
1061 DBG2("Consumer relayd socket sent");
1062
1063 error:
1064 return ret;
1065 }
1066
1067 static
1068 int consumer_send_pipe(struct consumer_socket *consumer_sock,
1069 enum lttng_consumer_command cmd, int pipe)
1070 {
1071 int ret;
1072 struct lttcomm_consumer_msg msg;
1073 const char *pipe_name;
1074 const char *command_name;
1075
1076 switch (cmd) {
1077 case LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE:
1078 pipe_name = "channel monitor";
1079 command_name = "SET_CHANNEL_MONITOR_PIPE";
1080 break;
1081 case LTTNG_CONSUMER_SET_CHANNEL_ROTATE_PIPE:
1082 pipe_name = "channel rotate";
1083 command_name = "SET_CHANNEL_ROTATE_PIPE";
1084 break;
1085 default:
1086 ERR("Unexpected command received in %s (cmd = %d)", __func__,
1087 (int) cmd);
1088 abort();
1089 }
1090
1091 /* Code flow error. Safety net. */
1092
1093 memset(&msg, 0, sizeof(msg));
1094 msg.cmd_type = cmd;
1095
1096 pthread_mutex_lock(consumer_sock->lock);
1097 DBG3("Sending %s command to consumer", command_name);
1098 ret = consumer_send_msg(consumer_sock, &msg);
1099 if (ret < 0) {
1100 goto error;
1101 }
1102
1103 DBG3("Sending %s pipe %d to consumer on socket %d",
1104 pipe_name,
1105 pipe, *consumer_sock->fd_ptr);
1106 ret = consumer_send_fds(consumer_sock, &pipe, 1);
1107 if (ret < 0) {
1108 goto error;
1109 }
1110
1111 DBG2("%s pipe successfully sent", pipe_name);
1112 error:
1113 pthread_mutex_unlock(consumer_sock->lock);
1114 return ret;
1115 }
1116
1117 int consumer_send_channel_monitor_pipe(struct consumer_socket *consumer_sock,
1118 int pipe)
1119 {
1120 return consumer_send_pipe(consumer_sock,
1121 LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE, pipe);
1122 }
1123
1124 int consumer_send_channel_rotate_pipe(struct consumer_socket *consumer_sock,
1125 int pipe)
1126 {
1127 return consumer_send_pipe(consumer_sock,
1128 LTTNG_CONSUMER_SET_CHANNEL_ROTATE_PIPE, pipe);
1129 }
1130
1131 /*
1132 * Set consumer subdirectory using the session name and a generated datetime if
1133 * needed. This is appended to the current subdirectory.
1134 */
1135 int consumer_set_subdir(struct consumer_output *consumer,
1136 const char *session_name)
1137 {
1138 int ret = 0;
1139 unsigned int have_default_name = 0;
1140 char datetime[16], tmp_path[PATH_MAX];
1141 time_t rawtime;
1142 struct tm *timeinfo;
1143
1144 assert(consumer);
1145 assert(session_name);
1146
1147 memset(tmp_path, 0, sizeof(tmp_path));
1148
1149 /* Flag if we have a default session. */
1150 if (strncmp(session_name, DEFAULT_SESSION_NAME "-",
1151 strlen(DEFAULT_SESSION_NAME) + 1) == 0) {
1152 have_default_name = 1;
1153 } else {
1154 /* Get date and time for session path */
1155 time(&rawtime);
1156 timeinfo = localtime(&rawtime);
1157 strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo);
1158 }
1159
1160 if (have_default_name) {
1161 ret = snprintf(tmp_path, sizeof(tmp_path),
1162 "%s/%s", consumer->subdir, session_name);
1163 } else {
1164 ret = snprintf(tmp_path, sizeof(tmp_path),
1165 "%s/%s-%s/", consumer->subdir, session_name, datetime);
1166 }
1167 if (ret < 0) {
1168 PERROR("snprintf session name date");
1169 goto error;
1170 }
1171
1172 if (lttng_strncpy(consumer->subdir, tmp_path,
1173 sizeof(consumer->subdir))) {
1174 ret = -EINVAL;
1175 goto error;
1176 }
1177 DBG2("Consumer subdir set to %s", consumer->subdir);
1178
1179 error:
1180 return ret;
1181 }
1182
1183 /*
1184 * Ask the consumer if the data is pending for the specific session id.
1185 * Returns 1 if data is pending, 0 otherwise, or < 0 on error.
1186 */
1187 int consumer_is_data_pending(uint64_t session_id,
1188 struct consumer_output *consumer)
1189 {
1190 int ret;
1191 int32_t ret_code = 0; /* Default is that the data is NOT pending */
1192 struct consumer_socket *socket;
1193 struct lttng_ht_iter iter;
1194 struct lttcomm_consumer_msg msg;
1195
1196 assert(consumer);
1197
1198 DBG3("Consumer data pending for id %" PRIu64, session_id);
1199
1200 memset(&msg, 0, sizeof(msg));
1201 msg.cmd_type = LTTNG_CONSUMER_DATA_PENDING;
1202 msg.u.data_pending.session_id = session_id;
1203
1204 /* Send command for each consumer */
1205 rcu_read_lock();
1206 cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket,
1207 node.node) {
1208 pthread_mutex_lock(socket->lock);
1209 ret = consumer_socket_send(socket, &msg, sizeof(msg));
1210 if (ret < 0) {
1211 pthread_mutex_unlock(socket->lock);
1212 goto error_unlock;
1213 }
1214
1215 /*
1216 * No need for a recv reply status because the answer to the command is
1217 * the reply status message.
1218 */
1219
1220 ret = consumer_socket_recv(socket, &ret_code, sizeof(ret_code));
1221 if (ret < 0) {
1222 pthread_mutex_unlock(socket->lock);
1223 goto error_unlock;
1224 }
1225 pthread_mutex_unlock(socket->lock);
1226
1227 if (ret_code == 1) {
1228 break;
1229 }
1230 }
1231 rcu_read_unlock();
1232
1233 DBG("Consumer data is %s pending for session id %" PRIu64,
1234 ret_code == 1 ? "" : "NOT", session_id);
1235 return ret_code;
1236
1237 error_unlock:
1238 rcu_read_unlock();
1239 return -1;
1240 }
1241
1242 /*
1243 * Send a flush command to consumer using the given channel key.
1244 *
1245 * Return 0 on success else a negative value.
1246 */
1247 int consumer_flush_channel(struct consumer_socket *socket, uint64_t key)
1248 {
1249 int ret;
1250 struct lttcomm_consumer_msg msg;
1251
1252 assert(socket);
1253
1254 DBG2("Consumer flush channel key %" PRIu64, key);
1255
1256 memset(&msg, 0, sizeof(msg));
1257 msg.cmd_type = LTTNG_CONSUMER_FLUSH_CHANNEL;
1258 msg.u.flush_channel.key = key;
1259
1260 pthread_mutex_lock(socket->lock);
1261 health_code_update();
1262
1263 ret = consumer_send_msg(socket, &msg);
1264 if (ret < 0) {
1265 goto end;
1266 }
1267
1268 end:
1269 health_code_update();
1270 pthread_mutex_unlock(socket->lock);
1271 return ret;
1272 }
1273
1274 /*
1275 * Send a clear quiescent command to consumer using the given channel key.
1276 *
1277 * Return 0 on success else a negative value.
1278 */
1279 int consumer_clear_quiescent_channel(struct consumer_socket *socket, uint64_t key)
1280 {
1281 int ret;
1282 struct lttcomm_consumer_msg msg;
1283
1284 assert(socket);
1285
1286 DBG2("Consumer clear quiescent channel key %" PRIu64, key);
1287
1288 memset(&msg, 0, sizeof(msg));
1289 msg.cmd_type = LTTNG_CONSUMER_CLEAR_QUIESCENT_CHANNEL;
1290 msg.u.clear_quiescent_channel.key = key;
1291
1292 pthread_mutex_lock(socket->lock);
1293 health_code_update();
1294
1295 ret = consumer_send_msg(socket, &msg);
1296 if (ret < 0) {
1297 goto end;
1298 }
1299
1300 end:
1301 health_code_update();
1302 pthread_mutex_unlock(socket->lock);
1303 return ret;
1304 }
1305
1306 /*
1307 * Send a close metadata command to consumer using the given channel key.
1308 * Called with registry lock held.
1309 *
1310 * Return 0 on success else a negative value.
1311 */
1312 int consumer_close_metadata(struct consumer_socket *socket,
1313 uint64_t metadata_key)
1314 {
1315 int ret;
1316 struct lttcomm_consumer_msg msg;
1317
1318 assert(socket);
1319
1320 DBG2("Consumer close metadata channel key %" PRIu64, metadata_key);
1321
1322 memset(&msg, 0, sizeof(msg));
1323 msg.cmd_type = LTTNG_CONSUMER_CLOSE_METADATA;
1324 msg.u.close_metadata.key = metadata_key;
1325
1326 pthread_mutex_lock(socket->lock);
1327 health_code_update();
1328
1329 ret = consumer_send_msg(socket, &msg);
1330 if (ret < 0) {
1331 goto end;
1332 }
1333
1334 end:
1335 health_code_update();
1336 pthread_mutex_unlock(socket->lock);
1337 return ret;
1338 }
1339
1340 /*
1341 * Send a setup metdata command to consumer using the given channel key.
1342 *
1343 * Return 0 on success else a negative value.
1344 */
1345 int consumer_setup_metadata(struct consumer_socket *socket,
1346 uint64_t metadata_key)
1347 {
1348 int ret;
1349 struct lttcomm_consumer_msg msg;
1350
1351 assert(socket);
1352
1353 DBG2("Consumer setup metadata channel key %" PRIu64, metadata_key);
1354
1355 memset(&msg, 0, sizeof(msg));
1356 msg.cmd_type = LTTNG_CONSUMER_SETUP_METADATA;
1357 msg.u.setup_metadata.key = metadata_key;
1358
1359 pthread_mutex_lock(socket->lock);
1360 health_code_update();
1361
1362 ret = consumer_send_msg(socket, &msg);
1363 if (ret < 0) {
1364 goto end;
1365 }
1366
1367 end:
1368 health_code_update();
1369 pthread_mutex_unlock(socket->lock);
1370 return ret;
1371 }
1372
1373 /*
1374 * Send metadata string to consumer.
1375 * RCU read-side lock must be held to guarantee existence of socket.
1376 *
1377 * Return 0 on success else a negative value.
1378 */
1379 int consumer_push_metadata(struct consumer_socket *socket,
1380 uint64_t metadata_key, char *metadata_str, size_t len,
1381 size_t target_offset, uint64_t version)
1382 {
1383 int ret;
1384 struct lttcomm_consumer_msg msg;
1385
1386 assert(socket);
1387
1388 DBG2("Consumer push metadata to consumer socket %d", *socket->fd_ptr);
1389
1390 pthread_mutex_lock(socket->lock);
1391
1392 memset(&msg, 0, sizeof(msg));
1393 msg.cmd_type = LTTNG_CONSUMER_PUSH_METADATA;
1394 msg.u.push_metadata.key = metadata_key;
1395 msg.u.push_metadata.target_offset = target_offset;
1396 msg.u.push_metadata.len = len;
1397 msg.u.push_metadata.version = version;
1398
1399 health_code_update();
1400 ret = consumer_send_msg(socket, &msg);
1401 if (ret < 0 || len == 0) {
1402 goto end;
1403 }
1404
1405 DBG3("Consumer pushing metadata on sock %d of len %zu", *socket->fd_ptr,
1406 len);
1407
1408 ret = consumer_socket_send(socket, metadata_str, len);
1409 if (ret < 0) {
1410 goto end;
1411 }
1412
1413 health_code_update();
1414 ret = consumer_recv_status_reply(socket);
1415 if (ret < 0) {
1416 goto end;
1417 }
1418
1419 end:
1420 pthread_mutex_unlock(socket->lock);
1421 health_code_update();
1422 return ret;
1423 }
1424
1425 /*
1426 * Ask the consumer to snapshot a specific channel using the key.
1427 *
1428 * Return 0 on success or else a negative error.
1429 */
1430 int consumer_snapshot_channel(struct consumer_socket *socket, uint64_t key,
1431 struct snapshot_output *output, int metadata, uid_t uid, gid_t gid,
1432 const char *session_path, int wait, uint64_t nb_packets_per_stream)
1433 {
1434 int ret;
1435 struct lttcomm_consumer_msg msg;
1436
1437 assert(socket);
1438 assert(output);
1439 assert(output->consumer);
1440
1441 DBG("Consumer snapshot channel key %" PRIu64, key);
1442
1443 memset(&msg, 0, sizeof(msg));
1444 msg.cmd_type = LTTNG_CONSUMER_SNAPSHOT_CHANNEL;
1445 msg.u.snapshot_channel.key = key;
1446 msg.u.snapshot_channel.nb_packets_per_stream = nb_packets_per_stream;
1447 msg.u.snapshot_channel.metadata = metadata;
1448
1449 if (output->consumer->type == CONSUMER_DST_NET) {
1450 msg.u.snapshot_channel.relayd_id = output->consumer->net_seq_index;
1451 msg.u.snapshot_channel.use_relayd = 1;
1452 ret = snprintf(msg.u.snapshot_channel.pathname,
1453 sizeof(msg.u.snapshot_channel.pathname),
1454 "%s/%s/%s-%s-%" PRIu64 "%s",
1455 output->consumer->dst.net.base_dir,
1456 output->consumer->subdir,
1457 output->name, output->datetime,
1458 output->nb_snapshot,
1459 session_path);
1460 if (ret < 0) {
1461 ret = -LTTNG_ERR_NOMEM;
1462 goto error;
1463 }
1464 } else {
1465 ret = snprintf(msg.u.snapshot_channel.pathname,
1466 sizeof(msg.u.snapshot_channel.pathname),
1467 "%s/%s-%s-%" PRIu64 "%s",
1468 output->consumer->dst.session_root_path,
1469 output->name, output->datetime,
1470 output->nb_snapshot,
1471 session_path);
1472 if (ret < 0) {
1473 ret = -LTTNG_ERR_NOMEM;
1474 goto error;
1475 }
1476 msg.u.snapshot_channel.relayd_id = (uint64_t) -1ULL;
1477
1478 /* Create directory. Ignore if exist. */
1479 ret = run_as_mkdir_recursive(msg.u.snapshot_channel.pathname,
1480 S_IRWXU | S_IRWXG, uid, gid);
1481 if (ret < 0) {
1482 if (errno != EEXIST) {
1483 ERR("Trace directory creation error");
1484 goto error;
1485 }
1486 }
1487 }
1488
1489 health_code_update();
1490 pthread_mutex_lock(socket->lock);
1491 ret = consumer_send_msg(socket, &msg);
1492 pthread_mutex_unlock(socket->lock);
1493 if (ret < 0) {
1494 goto error;
1495 }
1496
1497 error:
1498 health_code_update();
1499 return ret;
1500 }
1501
1502 /*
1503 * Ask the consumer the number of discarded events for a channel.
1504 */
1505 int consumer_get_discarded_events(uint64_t session_id, uint64_t channel_key,
1506 struct consumer_output *consumer, uint64_t *discarded)
1507 {
1508 int ret;
1509 struct consumer_socket *socket;
1510 struct lttng_ht_iter iter;
1511 struct lttcomm_consumer_msg msg;
1512
1513 assert(consumer);
1514
1515 DBG3("Consumer discarded events id %" PRIu64, session_id);
1516
1517 memset(&msg, 0, sizeof(msg));
1518 msg.cmd_type = LTTNG_CONSUMER_DISCARDED_EVENTS;
1519 msg.u.discarded_events.session_id = session_id;
1520 msg.u.discarded_events.channel_key = channel_key;
1521
1522 *discarded = 0;
1523
1524 /* Send command for each consumer */
1525 rcu_read_lock();
1526 cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket,
1527 node.node) {
1528 uint64_t consumer_discarded = 0;
1529 pthread_mutex_lock(socket->lock);
1530 ret = consumer_socket_send(socket, &msg, sizeof(msg));
1531 if (ret < 0) {
1532 pthread_mutex_unlock(socket->lock);
1533 goto end;
1534 }
1535
1536 /*
1537 * No need for a recv reply status because the answer to the
1538 * command is the reply status message.
1539 */
1540 ret = consumer_socket_recv(socket, &consumer_discarded,
1541 sizeof(consumer_discarded));
1542 if (ret < 0) {
1543 ERR("get discarded events");
1544 pthread_mutex_unlock(socket->lock);
1545 goto end;
1546 }
1547 pthread_mutex_unlock(socket->lock);
1548 *discarded += consumer_discarded;
1549 }
1550 ret = 0;
1551 DBG("Consumer discarded %" PRIu64 " events in session id %" PRIu64,
1552 *discarded, session_id);
1553
1554 end:
1555 rcu_read_unlock();
1556 return ret;
1557 }
1558
1559 /*
1560 * Ask the consumer the number of lost packets for a channel.
1561 */
1562 int consumer_get_lost_packets(uint64_t session_id, uint64_t channel_key,
1563 struct consumer_output *consumer, uint64_t *lost)
1564 {
1565 int ret;
1566 struct consumer_socket *socket;
1567 struct lttng_ht_iter iter;
1568 struct lttcomm_consumer_msg msg;
1569
1570 assert(consumer);
1571
1572 DBG3("Consumer lost packets id %" PRIu64, session_id);
1573
1574 memset(&msg, 0, sizeof(msg));
1575 msg.cmd_type = LTTNG_CONSUMER_LOST_PACKETS;
1576 msg.u.lost_packets.session_id = session_id;
1577 msg.u.lost_packets.channel_key = channel_key;
1578
1579 *lost = 0;
1580
1581 /* Send command for each consumer */
1582 rcu_read_lock();
1583 cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket,
1584 node.node) {
1585 uint64_t consumer_lost = 0;
1586 pthread_mutex_lock(socket->lock);
1587 ret = consumer_socket_send(socket, &msg, sizeof(msg));
1588 if (ret < 0) {
1589 pthread_mutex_unlock(socket->lock);
1590 goto end;
1591 }
1592
1593 /*
1594 * No need for a recv reply status because the answer to the
1595 * command is the reply status message.
1596 */
1597 ret = consumer_socket_recv(socket, &consumer_lost,
1598 sizeof(consumer_lost));
1599 if (ret < 0) {
1600 ERR("get lost packets");
1601 pthread_mutex_unlock(socket->lock);
1602 goto end;
1603 }
1604 pthread_mutex_unlock(socket->lock);
1605 *lost += consumer_lost;
1606 }
1607 ret = 0;
1608 DBG("Consumer lost %" PRIu64 " packets in session id %" PRIu64,
1609 *lost, session_id);
1610
1611 end:
1612 rcu_read_unlock();
1613 return ret;
1614 }
1615
1616 /*
1617 * Ask the consumer to rotate a channel.
1618 * domain_path contains "/kernel" for kernel or the complete path for UST
1619 * (ex: /ust/uid/1000/64-bit);
1620 *
1621 * The new_chunk_id is the session->rotate_count that has been incremented
1622 * when the rotation started. On the relay, this allows to keep track in which
1623 * chunk each stream is currently writing to (for the rotate_pending operation).
1624 */
1625 int consumer_rotate_channel(struct consumer_socket *socket, uint64_t key,
1626 uid_t uid, gid_t gid, struct consumer_output *output,
1627 char *domain_path, bool is_metadata_channel,
1628 uint64_t new_chunk_id,
1629 bool *rotate_pending_relay)
1630 {
1631 int ret;
1632 struct lttcomm_consumer_msg msg;
1633
1634 assert(socket);
1635
1636 DBG("Consumer rotate channel key %" PRIu64, key);
1637
1638 pthread_mutex_lock(socket->lock);
1639 memset(&msg, 0, sizeof(msg));
1640 msg.cmd_type = LTTNG_CONSUMER_ROTATE_CHANNEL;
1641 msg.u.rotate_channel.key = key;
1642 msg.u.rotate_channel.metadata = !!is_metadata_channel;
1643 msg.u.rotate_channel.new_chunk_id = new_chunk_id;
1644
1645 if (output->type == CONSUMER_DST_NET) {
1646 msg.u.rotate_channel.relayd_id = output->net_seq_index;
1647 ret = snprintf(msg.u.rotate_channel.pathname,
1648 sizeof(msg.u.rotate_channel.pathname), "%s%s%s",
1649 output->dst.net.base_dir,
1650 output->chunk_path, domain_path);
1651 if (ret < 0 || ret == sizeof(msg.u.rotate_channel.pathname)) {
1652 ERR("Failed to format channel path name when asking consumer to rotate channel");
1653 ret = -1;
1654 goto error;
1655 }
1656 *rotate_pending_relay = true;
1657 } else {
1658 msg.u.rotate_channel.relayd_id = (uint64_t) -1ULL;
1659 ret = snprintf(msg.u.rotate_channel.pathname,
1660 sizeof(msg.u.rotate_channel.pathname), "%s%s%s",
1661 output->dst.session_root_path,
1662 output->chunk_path, domain_path);
1663 if (ret < 0 || ret == sizeof(msg.u.rotate_channel.pathname)) {
1664 ERR("Failed to format channel path name when asking consumer to rotate channel");
1665 ret = -1;
1666 goto error;
1667 }
1668 }
1669
1670 health_code_update();
1671 ret = consumer_send_msg(socket, &msg);
1672 if (ret < 0) {
1673 goto error;
1674 }
1675
1676 error:
1677 pthread_mutex_unlock(socket->lock);
1678 health_code_update();
1679 return ret;
1680 }
1681
1682 int consumer_rotate_rename(struct consumer_socket *socket, uint64_t session_id,
1683 const struct consumer_output *output, const char *old_path,
1684 const char *new_path, uid_t uid, gid_t gid)
1685 {
1686 int ret;
1687 struct lttcomm_consumer_msg msg;
1688 size_t old_path_length, new_path_length;
1689
1690 assert(socket);
1691 assert(old_path);
1692 assert(new_path);
1693
1694 DBG("Consumer rotate rename session %" PRIu64 ", old path = \"%s\", new_path = \"%s\"",
1695 session_id, old_path, new_path);
1696
1697 old_path_length = strlen(old_path);
1698 if (old_path_length >= sizeof(msg.u.rotate_rename.old_path)) {
1699 ERR("consumer_rotate_rename: old path length (%zu bytes) exceeds the maximal length allowed by the consumer protocol (%zu bytes)",
1700 old_path_length + 1, sizeof(msg.u.rotate_rename.old_path));
1701 ret = -1;
1702 goto error;
1703 }
1704
1705 new_path_length = strlen(new_path);
1706 if (new_path_length >= sizeof(msg.u.rotate_rename.new_path)) {
1707 ERR("consumer_rotate_rename: new path length (%zu bytes) exceeds the maximal length allowed by the consumer protocol (%zu bytes)",
1708 new_path_length + 1, sizeof(msg.u.rotate_rename.new_path));
1709 ret = -1;
1710 goto error;
1711 }
1712
1713 memset(&msg, 0, sizeof(msg));
1714 msg.cmd_type = LTTNG_CONSUMER_ROTATE_RENAME;
1715 msg.u.rotate_rename.session_id = session_id;
1716 msg.u.rotate_rename.uid = uid;
1717 msg.u.rotate_rename.gid = gid;
1718 strcpy(msg.u.rotate_rename.old_path, old_path);
1719 strcpy(msg.u.rotate_rename.new_path, new_path);
1720
1721 if (output->type == CONSUMER_DST_NET) {
1722 msg.u.rotate_rename.relayd_id = output->net_seq_index;
1723 } else {
1724 msg.u.rotate_rename.relayd_id = -1ULL;
1725 }
1726
1727 health_code_update();
1728 ret = consumer_send_msg(socket, &msg);
1729 if (ret < 0) {
1730 goto error;
1731 }
1732
1733 error:
1734 health_code_update();
1735 return ret;
1736 }
1737
1738 /*
1739 * Ask the relay if a rotation is still pending. Must be called with the socket
1740 * lock held.
1741 *
1742 * Return 1 if the rotation is still pending, 0 if finished, a negative value
1743 * on error.
1744 */
1745 int consumer_rotate_pending_relay(struct consumer_socket *socket,
1746 struct consumer_output *output, uint64_t session_id,
1747 uint64_t chunk_id)
1748 {
1749 int ret;
1750 struct lttcomm_consumer_msg msg;
1751 uint32_t pending = 0;
1752
1753 assert(socket);
1754
1755 DBG("Consumer rotate pending on relay for session %" PRIu64 ", chunk id %" PRIu64,
1756 session_id, chunk_id);
1757 assert(output->type == CONSUMER_DST_NET);
1758
1759 memset(&msg, 0, sizeof(msg));
1760 msg.cmd_type = LTTNG_CONSUMER_ROTATE_PENDING_RELAY;
1761 msg.u.rotate_pending_relay.session_id = session_id;
1762 msg.u.rotate_pending_relay.relayd_id = output->net_seq_index;
1763 msg.u.rotate_pending_relay.chunk_id = chunk_id;
1764
1765 health_code_update();
1766 ret = consumer_send_msg(socket, &msg);
1767 if (ret < 0) {
1768 goto error;
1769 }
1770
1771 ret = consumer_socket_recv(socket, &pending, sizeof(pending));
1772 if (ret < 0) {
1773 goto error;
1774 }
1775
1776 ret = pending;
1777
1778 error:
1779 health_code_update();
1780 return ret;
1781 }
1782
1783 /*
1784 * Ask the consumer to create a directory.
1785 *
1786 * Called with the consumer socket lock held.
1787 */
1788 int consumer_mkdir(struct consumer_socket *socket, uint64_t session_id,
1789 const struct consumer_output *output, const char *path,
1790 uid_t uid, gid_t gid)
1791 {
1792 int ret;
1793 struct lttcomm_consumer_msg msg;
1794
1795 assert(socket);
1796
1797 DBG("Consumer mkdir %s in session %" PRIu64, path, session_id);
1798
1799 memset(&msg, 0, sizeof(msg));
1800 msg.cmd_type = LTTNG_CONSUMER_MKDIR;
1801 msg.u.mkdir.session_id = session_id;
1802 msg.u.mkdir.uid = uid;
1803 msg.u.mkdir.gid = gid;
1804 ret = snprintf(msg.u.mkdir.path, sizeof(msg.u.mkdir.path), "%s", path);
1805 if (ret < 0 || ret >= sizeof(msg.u.mkdir.path)) {
1806 ERR("Format path");
1807 ret = -1;
1808 goto error;
1809 }
1810
1811 if (output->type == CONSUMER_DST_NET) {
1812 msg.u.mkdir.relayd_id = output->net_seq_index;
1813 } else {
1814 msg.u.mkdir.relayd_id = -1ULL;
1815 }
1816
1817 health_code_update();
1818 ret = consumer_send_msg(socket, &msg);
1819 if (ret < 0) {
1820 goto error;
1821 }
1822
1823 error:
1824 health_code_update();
1825 return ret;
1826 }
This page took 0.0666 seconds and 4 git commands to generate.