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.
24 #include <sys/types.h>
28 #include <common/common.h>
29 #include <common/defaults.h>
30 #include <common/uri.h>
31 #include <common/relayd/relayd.h>
34 #include "health-sessiond.h"
39 * Send a data payload using a given consumer socket of size len.
41 * The consumer socket lock MUST be acquired before calling this since this
42 * function can change the fd value.
44 * Return 0 on success else a negative value on error.
46 int consumer_socket_send(struct consumer_socket
*socket
, void *msg
, size_t len
)
52 assert(socket
->fd_ptr
);
55 /* Consumer socket is invalid. Stopping. */
61 size
= lttcomm_send_unix_sock(fd
, msg
, len
);
63 /* The above call will print a PERROR on error. */
64 DBG("Error when sending data to consumer on sock %d", fd
);
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.
70 /* This call will PERROR on error. */
71 (void) lttcomm_close_unix_sock(fd
);
83 * Receive a data payload using a given consumer socket of size len.
85 * The consumer socket lock MUST be acquired before calling this since this
86 * function can change the fd value.
88 * Return 0 on success else a negative value on error.
90 int consumer_socket_recv(struct consumer_socket
*socket
, void *msg
, size_t len
)
96 assert(socket
->fd_ptr
);
99 /* Consumer socket is invalid. Stopping. */
100 fd
= *socket
->fd_ptr
;
105 size
= lttcomm_recv_unix_sock(fd
, msg
, len
);
107 /* The above call will print a PERROR on error. */
108 DBG("Error when receiving data from the consumer socket %d", fd
);
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.
114 /* This call will PERROR on error. */
115 (void) lttcomm_close_unix_sock(fd
);
116 *socket
->fd_ptr
= -1;
127 * Receive a reply command status message from the consumer. Consumer socket
128 * lock MUST be acquired before calling this function.
130 * Return 0 on success, -1 on recv error or a negative lttng error code which
131 * was possibly returned by the consumer.
133 int consumer_recv_status_reply(struct consumer_socket
*sock
)
136 struct lttcomm_consumer_status_msg reply
;
140 ret
= consumer_socket_recv(sock
, &reply
, sizeof(reply
));
145 if (reply
.ret_code
== LTTCOMM_CONSUMERD_SUCCESS
) {
149 ret
= -reply
.ret_code
;
150 DBG("Consumer ret code %d", ret
);
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
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.
165 int consumer_recv_status_channel(struct consumer_socket
*sock
,
166 uint64_t *key
, unsigned int *stream_count
)
169 struct lttcomm_consumer_status_channel reply
;
172 assert(stream_count
);
175 ret
= consumer_socket_recv(sock
, &reply
, sizeof(reply
));
180 /* An error is possible so don't touch the key and stream_count. */
181 if (reply
.ret_code
!= LTTCOMM_CONSUMERD_SUCCESS
) {
187 *stream_count
= reply
.stream_count
;
195 * Send destroy relayd command to consumer.
197 * On success return positive value. On error, negative value.
199 int consumer_send_destroy_relayd(struct consumer_socket
*sock
,
200 struct consumer_output
*consumer
)
203 struct lttcomm_consumer_msg msg
;
208 DBG2("Sending destroy relayd command to consumer sock %d", *sock
->fd_ptr
);
210 msg
.cmd_type
= LTTNG_CONSUMER_DESTROY_RELAYD
;
211 msg
.u
.destroy_relayd
.net_seq_idx
= consumer
->net_seq_index
;
213 pthread_mutex_lock(sock
->lock
);
214 ret
= consumer_socket_send(sock
, &msg
, sizeof(msg
));
219 /* Don't check the return value. The caller will do it. */
220 ret
= consumer_recv_status_reply(sock
);
222 DBG2("Consumer send destroy relayd command done");
225 pthread_mutex_unlock(sock
->lock
);
230 * For each consumer socket in the consumer output object, send a destroy
233 void consumer_output_send_destroy_relayd(struct consumer_output
*consumer
)
235 struct lttng_ht_iter iter
;
236 struct consumer_socket
*socket
;
240 /* Destroy any relayd connection */
241 if (consumer
->type
== CONSUMER_DST_NET
) {
243 cds_lfht_for_each_entry(consumer
->socks
->ht
, &iter
.iter
, socket
,
247 /* Send destroy relayd command */
248 ret
= consumer_send_destroy_relayd(socket
, consumer
);
250 DBG("Unable to send destroy relayd command to consumer");
251 /* Continue since we MUST delete everything at this point. */
259 * From a consumer_data structure, allocate and add a consumer socket to the
262 * Return 0 on success, else negative value on error
264 int consumer_create_socket(struct consumer_data
*data
,
265 struct consumer_output
*output
)
268 struct consumer_socket
*socket
;
272 if (output
== NULL
|| data
->cmd_sock
< 0) {
274 * Not an error. Possible there is simply not spawned consumer or it's
275 * disabled for the tracing session asking the socket.
281 socket
= consumer_find_socket(data
->cmd_sock
, output
);
283 if (socket
== NULL
) {
284 socket
= consumer_allocate_socket(&data
->cmd_sock
);
285 if (socket
== NULL
) {
290 socket
->registered
= 0;
291 socket
->lock
= &data
->lock
;
293 consumer_add_socket(socket
, output
);
297 socket
->type
= data
->type
;
299 DBG3("Consumer socket created (fd: %d) and added to output",
307 * Return the consumer socket from the given consumer output with the right
308 * bitness. On error, returns NULL.
310 * The caller MUST acquire a rcu read side lock and keep it until the socket
311 * object reference is not needed anymore.
313 struct consumer_socket
*consumer_find_socket_by_bitness(int bits
,
314 struct consumer_output
*consumer
)
317 struct consumer_socket
*socket
= NULL
;
321 consumer_fd
= uatomic_read(&ust_consumerd64_fd
);
324 consumer_fd
= uatomic_read(&ust_consumerd32_fd
);
331 socket
= consumer_find_socket(consumer_fd
, consumer
);
333 ERR("Consumer socket fd %d not found in consumer obj %p",
334 consumer_fd
, consumer
);
342 * Find a consumer_socket in a consumer_output hashtable. Read side lock must
343 * be acquired before calling this function and across use of the
344 * returned consumer_socket.
346 struct consumer_socket
*consumer_find_socket(int key
,
347 struct consumer_output
*consumer
)
349 struct lttng_ht_iter iter
;
350 struct lttng_ht_node_ulong
*node
;
351 struct consumer_socket
*socket
= NULL
;
353 /* Negative keys are lookup failures */
354 if (key
< 0 || consumer
== NULL
) {
358 lttng_ht_lookup(consumer
->socks
, (void *)((unsigned long) key
),
360 node
= lttng_ht_iter_get_node_ulong(&iter
);
362 socket
= caa_container_of(node
, struct consumer_socket
, node
);
369 * Allocate a new consumer_socket and return the pointer.
371 struct consumer_socket
*consumer_allocate_socket(int *fd
)
373 struct consumer_socket
*socket
= NULL
;
377 socket
= zmalloc(sizeof(struct consumer_socket
));
378 if (socket
== NULL
) {
379 PERROR("zmalloc consumer socket");
384 lttng_ht_node_init_ulong(&socket
->node
, *fd
);
391 * Add consumer socket to consumer output object. Read side lock must be
392 * acquired before calling this function.
394 void consumer_add_socket(struct consumer_socket
*sock
,
395 struct consumer_output
*consumer
)
400 lttng_ht_add_unique_ulong(consumer
->socks
, &sock
->node
);
404 * Delte consumer socket to consumer output object. Read side lock must be
405 * acquired before calling this function.
407 void consumer_del_socket(struct consumer_socket
*sock
,
408 struct consumer_output
*consumer
)
411 struct lttng_ht_iter iter
;
416 iter
.iter
.node
= &sock
->node
.node
;
417 ret
= lttng_ht_del(consumer
->socks
, &iter
);
422 * RCU destroy call function.
424 static void destroy_socket_rcu(struct rcu_head
*head
)
426 struct lttng_ht_node_ulong
*node
=
427 caa_container_of(head
, struct lttng_ht_node_ulong
, head
);
428 struct consumer_socket
*socket
=
429 caa_container_of(node
, struct consumer_socket
, node
);
435 * Destroy and free socket pointer in a call RCU. Read side lock must be
436 * acquired before calling this function.
438 void consumer_destroy_socket(struct consumer_socket
*sock
)
443 * We DO NOT close the file descriptor here since it is global to the
444 * session daemon and is closed only if the consumer dies or a custom
445 * consumer was registered,
447 if (sock
->registered
) {
448 DBG3("Consumer socket was registered. Closing fd %d", *sock
->fd_ptr
);
449 lttcomm_close_unix_sock(*sock
->fd_ptr
);
452 call_rcu(&sock
->node
.head
, destroy_socket_rcu
);
456 * Allocate and assign data to a consumer_output object.
458 * Return pointer to structure.
460 struct consumer_output
*consumer_create_output(enum consumer_dst_type type
)
462 struct consumer_output
*output
= NULL
;
464 output
= zmalloc(sizeof(struct consumer_output
));
465 if (output
== NULL
) {
466 PERROR("zmalloc consumer_output");
470 /* By default, consumer output is enabled */
473 output
->net_seq_index
= (uint64_t) -1ULL;
475 output
->socks
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
482 * Iterate over the consumer output socket hash table and destroy them. The
483 * socket file descriptor are only closed if the consumer output was
484 * registered meaning it's an external consumer.
486 void consumer_destroy_output_sockets(struct consumer_output
*obj
)
488 struct lttng_ht_iter iter
;
489 struct consumer_socket
*socket
;
496 cds_lfht_for_each_entry(obj
->socks
->ht
, &iter
.iter
, socket
, node
.node
) {
497 consumer_del_socket(socket
, obj
);
498 consumer_destroy_socket(socket
);
504 * Delete the consumer_output object from the list and free the ptr.
506 * Should *NOT* be called with RCU read-side lock held.
508 void consumer_destroy_output(struct consumer_output
*obj
)
514 consumer_destroy_output_sockets(obj
);
517 /* Finally destroy HT */
518 ht_cleanup_push(obj
->socks
);
525 * Copy consumer output and returned the newly allocated copy.
527 * Should *NOT* be called with RCU read-side lock held.
529 struct consumer_output
*consumer_copy_output(struct consumer_output
*obj
)
532 struct lttng_ht
*tmp_ht_ptr
;
533 struct consumer_output
*output
;
537 output
= consumer_create_output(obj
->type
);
538 if (output
== NULL
) {
541 /* Avoid losing the HT reference after the memcpy() */
542 tmp_ht_ptr
= output
->socks
;
544 memcpy(output
, obj
, sizeof(struct consumer_output
));
546 /* Putting back the HT pointer and start copying socket(s). */
547 output
->socks
= tmp_ht_ptr
;
549 ret
= consumer_copy_sockets(output
, obj
);
558 consumer_destroy_output(output
);
563 * Copy consumer sockets from src to dst.
565 * Return 0 on success or else a negative value.
567 int consumer_copy_sockets(struct consumer_output
*dst
,
568 struct consumer_output
*src
)
571 struct lttng_ht_iter iter
;
572 struct consumer_socket
*socket
, *copy_sock
;
578 cds_lfht_for_each_entry(src
->socks
->ht
, &iter
.iter
, socket
, node
.node
) {
579 /* Ignore socket that are already there. */
580 copy_sock
= consumer_find_socket(*socket
->fd_ptr
, dst
);
585 /* Create new socket object. */
586 copy_sock
= consumer_allocate_socket(socket
->fd_ptr
);
587 if (copy_sock
== NULL
) {
593 copy_sock
->registered
= socket
->registered
;
595 * This is valid because this lock is shared accross all consumer
596 * object being the global lock of the consumer data structure of the
599 copy_sock
->lock
= socket
->lock
;
600 consumer_add_socket(copy_sock
, dst
);
609 * Set network URI to the consumer output object.
611 * Return 0 on success. Return 1 if the URI were equal. Else, negative value on
614 int consumer_set_network_uri(struct consumer_output
*obj
,
615 struct lttng_uri
*uri
)
618 char tmp_path
[PATH_MAX
];
619 char hostname
[HOST_NAME_MAX
];
620 struct lttng_uri
*dst_uri
= NULL
;
622 /* Code flow error safety net. */
626 switch (uri
->stype
) {
627 case LTTNG_STREAM_CONTROL
:
628 dst_uri
= &obj
->dst
.net
.control
;
629 obj
->dst
.net
.control_isset
= 1;
630 if (uri
->port
== 0) {
631 /* Assign default port. */
632 uri
->port
= DEFAULT_NETWORK_CONTROL_PORT
;
634 if (obj
->dst
.net
.data_isset
&& uri
->port
==
635 obj
->dst
.net
.data
.port
) {
636 ret
= -LTTNG_ERR_INVALID
;
640 DBG3("Consumer control URI set with port %d", uri
->port
);
642 case LTTNG_STREAM_DATA
:
643 dst_uri
= &obj
->dst
.net
.data
;
644 obj
->dst
.net
.data_isset
= 1;
645 if (uri
->port
== 0) {
646 /* Assign default port. */
647 uri
->port
= DEFAULT_NETWORK_DATA_PORT
;
649 if (obj
->dst
.net
.control_isset
&& uri
->port
==
650 obj
->dst
.net
.control
.port
) {
651 ret
= -LTTNG_ERR_INVALID
;
655 DBG3("Consumer data URI set with port %d", uri
->port
);
658 ERR("Set network uri type unknown %d", uri
->stype
);
659 ret
= -LTTNG_ERR_INVALID
;
663 ret
= uri_compare(dst_uri
, uri
);
665 /* Same URI, don't touch it and return success. */
666 DBG3("URI network compare are the same");
670 /* URIs were not equal, replacing it. */
671 memset(dst_uri
, 0, sizeof(struct lttng_uri
));
672 memcpy(dst_uri
, uri
, sizeof(struct lttng_uri
));
673 obj
->type
= CONSUMER_DST_NET
;
675 /* Handle subdir and add hostname in front. */
676 if (dst_uri
->stype
== LTTNG_STREAM_CONTROL
) {
677 /* Get hostname to append it in the pathname */
678 ret
= gethostname(hostname
, sizeof(hostname
));
680 PERROR("gethostname. Fallback on default localhost");
681 strncpy(hostname
, "localhost", sizeof(hostname
));
683 hostname
[sizeof(hostname
) - 1] = '\0';
685 /* Setup consumer subdir if none present in the control URI */
686 if (strlen(dst_uri
->subdir
) == 0) {
687 ret
= snprintf(tmp_path
, sizeof(tmp_path
), "%s/%s",
688 hostname
, obj
->subdir
);
690 ret
= snprintf(tmp_path
, sizeof(tmp_path
), "%s/%s",
691 hostname
, dst_uri
->subdir
);
694 PERROR("snprintf set consumer uri subdir");
695 ret
= -LTTNG_ERR_NOMEM
;
699 strncpy(obj
->subdir
, tmp_path
, sizeof(obj
->subdir
));
700 DBG3("Consumer set network uri subdir path %s", tmp_path
);
711 * Send file descriptor to consumer via sock.
713 int consumer_send_fds(struct consumer_socket
*sock
, int *fds
, size_t nb_fd
)
721 ret
= lttcomm_send_fds_unix_sock(*sock
->fd_ptr
, fds
, nb_fd
);
723 /* The above call will print a PERROR on error. */
724 DBG("Error when sending consumer fds on sock %d", *sock
->fd_ptr
);
728 ret
= consumer_recv_status_reply(sock
);
735 * Consumer send communication message structure to consumer.
737 int consumer_send_msg(struct consumer_socket
*sock
,
738 struct lttcomm_consumer_msg
*msg
)
745 ret
= consumer_socket_send(sock
, msg
, sizeof(struct lttcomm_consumer_msg
));
750 ret
= consumer_recv_status_reply(sock
);
757 * Consumer send channel communication message structure to consumer.
759 int consumer_send_channel(struct consumer_socket
*sock
,
760 struct lttcomm_consumer_msg
*msg
)
767 ret
= consumer_send_msg(sock
, msg
);
777 * Populate the given consumer msg structure with the ask_channel command
780 void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg
*msg
,
781 uint64_t subbuf_size
,
784 unsigned int switch_timer_interval
,
785 unsigned int read_timer_interval
,
786 unsigned int live_timer_interval
,
790 const char *pathname
,
798 uint64_t tracefile_size
,
799 uint64_t tracefile_count
,
800 uint64_t session_id_per_pid
,
801 unsigned int monitor
,
802 uint32_t ust_app_uid
)
806 /* Zeroed structure */
807 memset(msg
, 0, sizeof(struct lttcomm_consumer_msg
));
809 msg
->cmd_type
= LTTNG_CONSUMER_ASK_CHANNEL_CREATION
;
810 msg
->u
.ask_channel
.subbuf_size
= subbuf_size
;
811 msg
->u
.ask_channel
.num_subbuf
= num_subbuf
;
812 msg
->u
.ask_channel
.overwrite
= overwrite
;
813 msg
->u
.ask_channel
.switch_timer_interval
= switch_timer_interval
;
814 msg
->u
.ask_channel
.read_timer_interval
= read_timer_interval
;
815 msg
->u
.ask_channel
.live_timer_interval
= live_timer_interval
;
816 msg
->u
.ask_channel
.output
= output
;
817 msg
->u
.ask_channel
.type
= type
;
818 msg
->u
.ask_channel
.session_id
= session_id
;
819 msg
->u
.ask_channel
.session_id_per_pid
= session_id_per_pid
;
820 msg
->u
.ask_channel
.uid
= uid
;
821 msg
->u
.ask_channel
.gid
= gid
;
822 msg
->u
.ask_channel
.relayd_id
= relayd_id
;
823 msg
->u
.ask_channel
.key
= key
;
824 msg
->u
.ask_channel
.chan_id
= chan_id
;
825 msg
->u
.ask_channel
.tracefile_size
= tracefile_size
;
826 msg
->u
.ask_channel
.tracefile_count
= tracefile_count
;
827 msg
->u
.ask_channel
.monitor
= monitor
;
828 msg
->u
.ask_channel
.ust_app_uid
= ust_app_uid
;
830 memcpy(msg
->u
.ask_channel
.uuid
, uuid
, sizeof(msg
->u
.ask_channel
.uuid
));
833 strncpy(msg
->u
.ask_channel
.pathname
, pathname
,
834 sizeof(msg
->u
.ask_channel
.pathname
));
835 msg
->u
.ask_channel
.pathname
[sizeof(msg
->u
.ask_channel
.pathname
)-1] = '\0';
838 strncpy(msg
->u
.ask_channel
.name
, name
, sizeof(msg
->u
.ask_channel
.name
));
839 msg
->u
.ask_channel
.name
[sizeof(msg
->u
.ask_channel
.name
) - 1] = '\0';
843 * Init channel communication message structure.
845 void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg
*msg
,
846 enum lttng_consumer_command cmd
,
847 uint64_t channel_key
,
849 const char *pathname
,
854 unsigned int nb_init_streams
,
855 enum lttng_event_output output
,
857 uint64_t tracefile_size
,
858 uint64_t tracefile_count
,
859 unsigned int monitor
,
860 unsigned int live_timer_interval
)
864 /* Zeroed structure */
865 memset(msg
, 0, sizeof(struct lttcomm_consumer_msg
));
869 msg
->u
.channel
.channel_key
= channel_key
;
870 msg
->u
.channel
.session_id
= session_id
;
871 msg
->u
.channel
.uid
= uid
;
872 msg
->u
.channel
.gid
= gid
;
873 msg
->u
.channel
.relayd_id
= relayd_id
;
874 msg
->u
.channel
.nb_init_streams
= nb_init_streams
;
875 msg
->u
.channel
.output
= output
;
876 msg
->u
.channel
.type
= type
;
877 msg
->u
.channel
.tracefile_size
= tracefile_size
;
878 msg
->u
.channel
.tracefile_count
= tracefile_count
;
879 msg
->u
.channel
.monitor
= monitor
;
880 msg
->u
.channel
.live_timer_interval
= live_timer_interval
;
882 strncpy(msg
->u
.channel
.pathname
, pathname
,
883 sizeof(msg
->u
.channel
.pathname
));
884 msg
->u
.channel
.pathname
[sizeof(msg
->u
.channel
.pathname
) - 1] = '\0';
886 strncpy(msg
->u
.channel
.name
, name
, sizeof(msg
->u
.channel
.name
));
887 msg
->u
.channel
.name
[sizeof(msg
->u
.channel
.name
) - 1] = '\0';
891 * Init stream communication message structure.
893 void consumer_init_stream_comm_msg(struct lttcomm_consumer_msg
*msg
,
894 enum lttng_consumer_command cmd
,
895 uint64_t channel_key
,
901 memset(msg
, 0, sizeof(struct lttcomm_consumer_msg
));
904 msg
->u
.stream
.channel_key
= channel_key
;
905 msg
->u
.stream
.stream_key
= stream_key
;
906 msg
->u
.stream
.cpu
= cpu
;
910 * Send stream communication structure to the consumer.
912 int consumer_send_stream(struct consumer_socket
*sock
,
913 struct consumer_output
*dst
, struct lttcomm_consumer_msg
*msg
,
914 int *fds
, size_t nb_fd
)
923 ret
= consumer_send_msg(sock
, msg
);
928 ret
= consumer_send_fds(sock
, fds
, nb_fd
);
938 * Send relayd socket to consumer associated with a session name.
940 * On success return positive value. On error, negative value.
942 int consumer_send_relayd_socket(struct consumer_socket
*consumer_sock
,
943 struct lttcomm_relayd_sock
*rsock
, struct consumer_output
*consumer
,
944 enum lttng_stream_type type
, uint64_t session_id
,
945 char *session_name
, char *hostname
, int session_live_timer
)
948 struct lttcomm_consumer_msg msg
;
950 /* Code flow error. Safety net. */
953 assert(consumer_sock
);
955 /* Bail out if consumer is disabled */
956 if (!consumer
->enabled
) {
961 if (type
== LTTNG_STREAM_CONTROL
) {
962 ret
= relayd_create_session(rsock
,
963 &msg
.u
.relayd_sock
.relayd_session_id
,
964 session_name
, hostname
, session_live_timer
,
967 /* Close the control socket. */
968 (void) relayd_close(rsock
);
973 msg
.cmd_type
= LTTNG_CONSUMER_ADD_RELAYD_SOCKET
;
975 * Assign network consumer output index using the temporary consumer since
976 * this call should only be made from within a set_consumer_uri() function
977 * call in the session daemon.
979 msg
.u
.relayd_sock
.net_index
= consumer
->net_seq_index
;
980 msg
.u
.relayd_sock
.type
= type
;
981 msg
.u
.relayd_sock
.session_id
= session_id
;
982 memcpy(&msg
.u
.relayd_sock
.sock
, rsock
, sizeof(msg
.u
.relayd_sock
.sock
));
984 DBG3("Sending relayd sock info to consumer on %d", *consumer_sock
->fd_ptr
);
985 ret
= consumer_send_msg(consumer_sock
, &msg
);
990 DBG3("Sending relayd socket file descriptor to consumer");
991 ret
= consumer_send_fds(consumer_sock
, &rsock
->sock
.fd
, 1);
996 DBG2("Consumer relayd socket sent");
1003 * Set consumer subdirectory using the session name and a generated datetime if
1004 * needed. This is appended to the current subdirectory.
1006 int consumer_set_subdir(struct consumer_output
*consumer
,
1007 const char *session_name
)
1010 unsigned int have_default_name
= 0;
1011 char datetime
[16], tmp_path
[PATH_MAX
];
1013 struct tm
*timeinfo
;
1016 assert(session_name
);
1018 memset(tmp_path
, 0, sizeof(tmp_path
));
1020 /* Flag if we have a default session. */
1021 if (strncmp(session_name
, DEFAULT_SESSION_NAME
"-",
1022 strlen(DEFAULT_SESSION_NAME
) + 1) == 0) {
1023 have_default_name
= 1;
1025 /* Get date and time for session path */
1027 timeinfo
= localtime(&rawtime
);
1028 strftime(datetime
, sizeof(datetime
), "%Y%m%d-%H%M%S", timeinfo
);
1031 if (have_default_name
) {
1032 ret
= snprintf(tmp_path
, sizeof(tmp_path
),
1033 "%s/%s", consumer
->subdir
, session_name
);
1035 ret
= snprintf(tmp_path
, sizeof(tmp_path
),
1036 "%s/%s-%s/", consumer
->subdir
, session_name
, datetime
);
1039 PERROR("snprintf session name date");
1043 strncpy(consumer
->subdir
, tmp_path
, sizeof(consumer
->subdir
));
1044 DBG2("Consumer subdir set to %s", consumer
->subdir
);
1051 * Ask the consumer if the data is ready to read (NOT pending) for the specific
1054 * This function has a different behavior with the consumer i.e. that it waits
1055 * for a reply from the consumer if yes or no the data is pending.
1057 int consumer_is_data_pending(uint64_t session_id
,
1058 struct consumer_output
*consumer
)
1061 int32_t ret_code
= 0; /* Default is that the data is NOT pending */
1062 struct consumer_socket
*socket
;
1063 struct lttng_ht_iter iter
;
1064 struct lttcomm_consumer_msg msg
;
1068 msg
.cmd_type
= LTTNG_CONSUMER_DATA_PENDING
;
1070 msg
.u
.data_pending
.session_id
= session_id
;
1072 DBG3("Consumer data pending for id %" PRIu64
, session_id
);
1074 /* Send command for each consumer */
1076 cds_lfht_for_each_entry(consumer
->socks
->ht
, &iter
.iter
, socket
,
1078 pthread_mutex_lock(socket
->lock
);
1079 ret
= consumer_socket_send(socket
, &msg
, sizeof(msg
));
1081 pthread_mutex_unlock(socket
->lock
);
1086 * No need for a recv reply status because the answer to the command is
1087 * the reply status message.
1090 ret
= consumer_socket_recv(socket
, &ret_code
, sizeof(ret_code
));
1092 pthread_mutex_unlock(socket
->lock
);
1095 pthread_mutex_unlock(socket
->lock
);
1097 if (ret_code
== 1) {
1103 DBG("Consumer data is %s pending for session id %" PRIu64
,
1104 ret_code
== 1 ? "" : "NOT", session_id
);
1113 * Send a flush command to consumer using the given channel key.
1115 * Return 0 on success else a negative value.
1117 int consumer_flush_channel(struct consumer_socket
*socket
, uint64_t key
)
1120 struct lttcomm_consumer_msg msg
;
1124 DBG2("Consumer flush channel key %" PRIu64
, key
);
1126 msg
.cmd_type
= LTTNG_CONSUMER_FLUSH_CHANNEL
;
1127 msg
.u
.flush_channel
.key
= key
;
1129 pthread_mutex_lock(socket
->lock
);
1130 health_code_update();
1132 ret
= consumer_send_msg(socket
, &msg
);
1138 health_code_update();
1139 pthread_mutex_unlock(socket
->lock
);
1144 * Send a close metdata command to consumer using the given channel key.
1146 * Return 0 on success else a negative value.
1148 int consumer_close_metadata(struct consumer_socket
*socket
,
1149 uint64_t metadata_key
)
1152 struct lttcomm_consumer_msg msg
;
1156 DBG2("Consumer close metadata channel key %" PRIu64
, metadata_key
);
1158 msg
.cmd_type
= LTTNG_CONSUMER_CLOSE_METADATA
;
1159 msg
.u
.close_metadata
.key
= metadata_key
;
1161 pthread_mutex_lock(socket
->lock
);
1162 health_code_update();
1164 ret
= consumer_send_msg(socket
, &msg
);
1170 health_code_update();
1171 pthread_mutex_unlock(socket
->lock
);
1176 * Send a setup metdata command to consumer using the given channel key.
1178 * Return 0 on success else a negative value.
1180 int consumer_setup_metadata(struct consumer_socket
*socket
,
1181 uint64_t metadata_key
)
1184 struct lttcomm_consumer_msg msg
;
1188 DBG2("Consumer setup metadata channel key %" PRIu64
, metadata_key
);
1190 msg
.cmd_type
= LTTNG_CONSUMER_SETUP_METADATA
;
1191 msg
.u
.setup_metadata
.key
= metadata_key
;
1193 pthread_mutex_lock(socket
->lock
);
1194 health_code_update();
1196 ret
= consumer_send_msg(socket
, &msg
);
1202 health_code_update();
1203 pthread_mutex_unlock(socket
->lock
);
1208 * Send metadata string to consumer. Socket lock MUST be acquired.
1210 * Return 0 on success else a negative value.
1212 int consumer_push_metadata(struct consumer_socket
*socket
,
1213 uint64_t metadata_key
, char *metadata_str
, size_t len
,
1214 size_t target_offset
)
1217 struct lttcomm_consumer_msg msg
;
1221 DBG2("Consumer push metadata to consumer socket %d", *socket
->fd_ptr
);
1223 msg
.cmd_type
= LTTNG_CONSUMER_PUSH_METADATA
;
1224 msg
.u
.push_metadata
.key
= metadata_key
;
1225 msg
.u
.push_metadata
.target_offset
= target_offset
;
1226 msg
.u
.push_metadata
.len
= len
;
1228 health_code_update();
1229 ret
= consumer_send_msg(socket
, &msg
);
1230 if (ret
< 0 || len
== 0) {
1234 DBG3("Consumer pushing metadata on sock %d of len %zu", *socket
->fd_ptr
,
1237 ret
= consumer_socket_send(socket
, metadata_str
, len
);
1242 health_code_update();
1243 ret
= consumer_recv_status_reply(socket
);
1249 health_code_update();
1254 * Ask the consumer to snapshot a specific channel using the key.
1256 * Return 0 on success or else a negative error.
1258 int consumer_snapshot_channel(struct consumer_socket
*socket
, uint64_t key
,
1259 struct snapshot_output
*output
, int metadata
, uid_t uid
, gid_t gid
,
1260 const char *session_path
, int wait
, int max_stream_size
)
1263 struct lttcomm_consumer_msg msg
;
1267 assert(output
->consumer
);
1269 DBG("Consumer snapshot channel key %" PRIu64
, key
);
1271 memset(&msg
, 0, sizeof(msg
));
1272 msg
.cmd_type
= LTTNG_CONSUMER_SNAPSHOT_CHANNEL
;
1273 msg
.u
.snapshot_channel
.key
= key
;
1274 msg
.u
.snapshot_channel
.max_stream_size
= max_stream_size
;
1275 msg
.u
.snapshot_channel
.metadata
= metadata
;
1277 if (output
->consumer
->type
== CONSUMER_DST_NET
) {
1278 msg
.u
.snapshot_channel
.relayd_id
= output
->consumer
->net_seq_index
;
1279 msg
.u
.snapshot_channel
.use_relayd
= 1;
1280 ret
= snprintf(msg
.u
.snapshot_channel
.pathname
,
1281 sizeof(msg
.u
.snapshot_channel
.pathname
),
1282 "%s/%s-%s-%" PRIu64
"%s", output
->consumer
->subdir
,
1283 output
->name
, output
->datetime
, output
->nb_snapshot
,
1286 ret
= -LTTNG_ERR_NOMEM
;
1290 ret
= snprintf(msg
.u
.snapshot_channel
.pathname
,
1291 sizeof(msg
.u
.snapshot_channel
.pathname
),
1292 "%s/%s-%s-%" PRIu64
"%s", output
->consumer
->dst
.trace_path
,
1293 output
->name
, output
->datetime
, output
->nb_snapshot
,
1296 ret
= -LTTNG_ERR_NOMEM
;
1299 msg
.u
.snapshot_channel
.relayd_id
= (uint64_t) -1ULL;
1301 /* Create directory. Ignore if exist. */
1302 ret
= run_as_mkdir_recursive(msg
.u
.snapshot_channel
.pathname
,
1303 S_IRWXU
| S_IRWXG
, uid
, gid
);
1305 if (ret
!= -EEXIST
) {
1306 ERR("Trace directory creation error");
1312 health_code_update();
1313 ret
= consumer_send_msg(socket
, &msg
);
1319 health_code_update();