2 * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
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.
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
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.
25 #include <common/common.h>
26 #include <common/defaults.h>
27 #include <common/compat/string.h>
30 #include "health-sessiond.h"
31 #include "kernel-consumer.h"
32 #include "notification-thread-commands.h"
34 #include "lttng-sessiond.h"
36 static char *create_channel_path(struct consumer_output
*consumer
,
40 char tmp_path
[PATH_MAX
];
41 char *pathname
= NULL
;
45 /* Get the right path name destination */
46 if (consumer
->type
== CONSUMER_DST_LOCAL
) {
47 /* Set application path to the destination path */
48 ret
= snprintf(tmp_path
, sizeof(tmp_path
), "%s%s%s",
49 consumer
->dst
.session_root_path
,
53 PERROR("snprintf kernel channel path");
55 } else if (ret
>= sizeof(tmp_path
)) {
56 ERR("Kernel channel path exceeds the maximal allowed length of of %zu bytes (%i bytes required) with path \"%s%s%s\"",
57 sizeof(tmp_path
), ret
,
58 consumer
->dst
.session_root_path
,
63 pathname
= lttng_strndup(tmp_path
, sizeof(tmp_path
));
65 PERROR("lttng_strndup");
69 /* Create directory */
70 ret
= run_as_mkdir_recursive(pathname
, S_IRWXU
| S_IRWXG
, uid
, gid
);
72 if (errno
!= EEXIST
) {
73 ERR("Trace directory creation error");
77 DBG3("Kernel local consumer tracefile path: %s", pathname
);
79 ret
= snprintf(tmp_path
, sizeof(tmp_path
), "%s%s",
80 consumer
->dst
.net
.base_dir
,
83 PERROR("snprintf kernel metadata path");
85 } else if (ret
>= sizeof(tmp_path
)) {
86 ERR("Kernel channel path exceeds the maximal allowed length of of %zu bytes (%i bytes required) with path \"%s%s\"",
87 sizeof(tmp_path
), ret
,
88 consumer
->dst
.net
.base_dir
,
92 pathname
= lttng_strndup(tmp_path
, sizeof(tmp_path
));
94 PERROR("lttng_strndup");
97 DBG3("Kernel network consumer subdir path: %s", pathname
);
108 * Sending a single channel to the consumer with command ADD_CHANNEL.
110 int kernel_consumer_add_channel(struct consumer_socket
*sock
,
111 struct ltt_kernel_channel
*channel
,
112 struct ltt_kernel_session
*ksession
,
113 unsigned int monitor
)
117 struct lttcomm_consumer_msg lkm
;
118 struct consumer_output
*consumer
;
119 enum lttng_error_code status
;
120 struct ltt_session
*session
;
121 struct lttng_channel_extended
*channel_attr_extended
;
126 assert(ksession
->consumer
);
128 consumer
= ksession
->consumer
;
129 channel_attr_extended
= (struct lttng_channel_extended
*)
130 channel
->channel
->attr
.extended
.ptr
;
132 DBG("Kernel consumer adding channel %s to kernel consumer",
133 channel
->channel
->name
);
136 pathname
= create_channel_path(consumer
, ksession
->uid
,
140 pathname
= strdup("");
147 /* Prep channel message structure */
148 consumer_init_add_channel_comm_msg(&lkm
,
154 consumer
->net_seq_index
,
155 channel
->channel
->name
,
156 channel
->stream_count
,
157 channel
->channel
->attr
.output
,
158 CONSUMER_CHANNEL_TYPE_DATA
,
159 channel
->channel
->attr
.tracefile_size
,
160 channel
->channel
->attr
.tracefile_count
,
162 channel
->channel
->attr
.live_timer_interval
,
163 channel_attr_extended
->monitor_timer_interval
);
165 health_code_update();
167 ret
= consumer_send_channel(sock
, &lkm
);
172 health_code_update();
174 session
= session_find_by_id(ksession
->id
);
176 assert(pthread_mutex_trylock(&session
->lock
));
177 assert(session_trylock_list());
179 status
= notification_thread_command_add_channel(
180 notification_thread_handle
, session
->name
,
181 ksession
->uid
, ksession
->gid
,
182 channel
->channel
->name
, channel
->key
,
184 channel
->channel
->attr
.subbuf_size
* channel
->channel
->attr
.num_subbuf
);
186 if (status
!= LTTNG_OK
) {
191 channel
->published_to_notification_thread
= true;
199 * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM.
201 * The consumer socket lock must be held by the caller.
203 int kernel_consumer_add_metadata(struct consumer_socket
*sock
,
204 struct ltt_kernel_session
*ksession
, unsigned int monitor
)
208 struct lttcomm_consumer_msg lkm
;
209 struct consumer_output
*consumer
;
210 struct ltt_session
*session
;
216 assert(ksession
->consumer
);
219 DBG("Sending metadata %d to kernel consumer",
220 ksession
->metadata_stream_fd
);
222 /* Get consumer output pointer */
223 consumer
= ksession
->consumer
;
226 pathname
= create_channel_path(consumer
,
227 ksession
->uid
, ksession
->gid
);
230 pathname
= strdup("");
237 session
= session_find_by_id(ksession
->id
);
239 assert(pthread_mutex_trylock(&session
->lock
));
240 assert(session_trylock_list());
242 /* Prep channel message structure */
243 consumer_init_add_channel_comm_msg(&lkm
,
244 ksession
->metadata
->key
,
249 consumer
->net_seq_index
,
250 DEFAULT_METADATA_NAME
,
252 DEFAULT_KERNEL_CHANNEL_OUTPUT
,
253 CONSUMER_CHANNEL_TYPE_METADATA
,
257 health_code_update();
259 ret
= consumer_send_channel(sock
, &lkm
);
264 health_code_update();
266 /* Prep stream message structure */
267 consumer_init_add_stream_comm_msg(&lkm
,
268 ksession
->metadata
->key
,
269 ksession
->metadata_stream_fd
,
270 0 /* CPU: 0 for metadata. */,
271 session
->current_archive_id
);
273 health_code_update();
275 /* Send stream and file descriptor */
276 ret
= consumer_send_stream(sock
, consumer
, &lkm
,
277 &ksession
->metadata_stream_fd
, 1);
282 health_code_update();
291 * Sending a single stream to the consumer with command ADD_STREAM.
294 int kernel_consumer_add_stream(struct consumer_socket
*sock
,
295 struct ltt_kernel_channel
*channel
,
296 struct ltt_kernel_stream
*stream
,
297 struct ltt_kernel_session
*session
, unsigned int monitor
,
298 uint64_t trace_archive_id
)
301 struct lttcomm_consumer_msg lkm
;
302 struct consumer_output
*consumer
;
307 assert(session
->consumer
);
310 DBG("Sending stream %d of channel %s to kernel consumer",
311 stream
->fd
, channel
->channel
->name
);
313 /* Get consumer output pointer */
314 consumer
= session
->consumer
;
316 /* Prep stream consumer message */
317 consumer_init_add_stream_comm_msg(&lkm
,
323 health_code_update();
325 /* Send stream and file descriptor */
326 ret
= consumer_send_stream(sock
, consumer
, &lkm
, &stream
->fd
, 1);
331 health_code_update();
338 * Sending the notification that all streams were sent with STREAMS_SENT.
340 int kernel_consumer_streams_sent(struct consumer_socket
*sock
,
341 struct ltt_kernel_session
*session
, uint64_t channel_key
)
344 struct lttcomm_consumer_msg lkm
;
345 struct consumer_output
*consumer
;
350 DBG("Sending streams_sent");
351 /* Get consumer output pointer */
352 consumer
= session
->consumer
;
354 /* Prep stream consumer message */
355 consumer_init_streams_sent_comm_msg(&lkm
,
356 LTTNG_CONSUMER_STREAMS_SENT
,
357 channel_key
, consumer
->net_seq_index
);
359 health_code_update();
361 /* Send stream and file descriptor */
362 ret
= consumer_send_msg(sock
, &lkm
);
372 * Send all stream fds of kernel channel to the consumer.
374 * The consumer socket lock must be held by the caller.
376 int kernel_consumer_send_channel_streams(struct consumer_socket
*sock
,
377 struct ltt_kernel_channel
*channel
, struct ltt_kernel_session
*ksession
,
378 unsigned int monitor
)
381 struct ltt_kernel_stream
*stream
;
382 struct ltt_session
*session
;
387 assert(ksession
->consumer
);
392 session
= session_find_by_id(ksession
->id
);
394 assert(pthread_mutex_trylock(&session
->lock
));
395 assert(session_trylock_list());
397 /* Bail out if consumer is disabled */
398 if (!ksession
->consumer
->enabled
) {
403 DBG("Sending streams of channel %s to kernel consumer",
404 channel
->channel
->name
);
406 if (!channel
->sent_to_consumer
) {
407 ret
= kernel_consumer_add_channel(sock
, channel
, ksession
, monitor
);
411 channel
->sent_to_consumer
= true;
415 cds_list_for_each_entry(stream
, &channel
->stream_list
.head
, list
) {
416 if (!stream
->fd
|| stream
->sent_to_consumer
) {
420 /* Add stream on the kernel consumer side. */
421 ret
= kernel_consumer_add_stream(sock
, channel
, stream
,
422 ksession
, monitor
, session
->current_archive_id
);
426 stream
->sent_to_consumer
= true;
435 * Send all stream fds of the kernel session to the consumer.
437 * The consumer socket lock must be held by the caller.
439 int kernel_consumer_send_session(struct consumer_socket
*sock
,
440 struct ltt_kernel_session
*session
)
442 int ret
, monitor
= 0;
443 struct ltt_kernel_channel
*chan
;
447 assert(session
->consumer
);
450 /* Bail out if consumer is disabled */
451 if (!session
->consumer
->enabled
) {
456 /* Don't monitor the streams on the consumer if in flight recorder. */
457 if (session
->output_traces
) {
461 DBG("Sending session stream to kernel consumer");
463 if (session
->metadata_stream_fd
>= 0 && session
->metadata
) {
464 ret
= kernel_consumer_add_metadata(sock
, session
, monitor
);
470 /* Send channel and streams of it */
471 cds_list_for_each_entry(chan
, &session
->channel_list
.head
, list
) {
472 ret
= kernel_consumer_send_channel_streams(sock
, chan
, session
,
479 * Inform the relay that all the streams for the
482 ret
= kernel_consumer_streams_sent(sock
, session
, chan
->key
);
489 DBG("Kernel consumer FDs of metadata and channel streams sent");
491 session
->consumer_fds_sent
= 1;
498 int kernel_consumer_destroy_channel(struct consumer_socket
*socket
,
499 struct ltt_kernel_channel
*channel
)
502 struct lttcomm_consumer_msg msg
;
507 DBG("Sending kernel consumer destroy channel key %" PRIu64
, channel
->key
);
509 memset(&msg
, 0, sizeof(msg
));
510 msg
.cmd_type
= LTTNG_CONSUMER_DESTROY_CHANNEL
;
511 msg
.u
.destroy_channel
.key
= channel
->key
;
513 pthread_mutex_lock(socket
->lock
);
514 health_code_update();
516 ret
= consumer_send_msg(socket
, &msg
);
522 health_code_update();
523 pthread_mutex_unlock(socket
->lock
);
527 int kernel_consumer_destroy_metadata(struct consumer_socket
*socket
,
528 struct ltt_kernel_metadata
*metadata
)
531 struct lttcomm_consumer_msg msg
;
536 DBG("Sending kernel consumer destroy channel key %" PRIu64
, metadata
->key
);
538 memset(&msg
, 0, sizeof(msg
));
539 msg
.cmd_type
= LTTNG_CONSUMER_DESTROY_CHANNEL
;
540 msg
.u
.destroy_channel
.key
= metadata
->key
;
542 pthread_mutex_lock(socket
->lock
);
543 health_code_update();
545 ret
= consumer_send_msg(socket
, &msg
);
551 health_code_update();
552 pthread_mutex_unlock(socket
->lock
);