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 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
;
214 pthread_mutex_lock(sock
->lock
);
215 ret
= consumer_socket_send(sock
, &msg
, sizeof(msg
));
220 /* Don't check the return value. The caller will do it. */
221 ret
= consumer_recv_status_reply(sock
);
223 DBG2("Consumer send destroy relayd command done");
226 pthread_mutex_unlock(sock
->lock
);
231 * For each consumer socket in the consumer output object, send a destroy
234 void consumer_output_send_destroy_relayd(struct consumer_output
*consumer
)
236 struct lttng_ht_iter iter
;
237 struct consumer_socket
*socket
;
241 /* Destroy any relayd connection */
242 if (consumer
->type
== CONSUMER_DST_NET
) {
244 cds_lfht_for_each_entry(consumer
->socks
->ht
, &iter
.iter
, socket
,
248 /* Send destroy relayd command */
249 ret
= consumer_send_destroy_relayd(socket
, consumer
);
251 DBG("Unable to send destroy relayd command to consumer");
252 /* Continue since we MUST delete everything at this point. */
260 * From a consumer_data structure, allocate and add a consumer socket to the
263 * Return 0 on success, else negative value on error
265 int consumer_create_socket(struct consumer_data
*data
,
266 struct consumer_output
*output
)
269 struct consumer_socket
*socket
;
273 if (output
== NULL
|| data
->cmd_sock
< 0) {
275 * Not an error. Possible there is simply not spawned consumer or it's
276 * disabled for the tracing session asking the socket.
282 socket
= consumer_find_socket(data
->cmd_sock
, output
);
284 if (socket
== NULL
) {
285 socket
= consumer_allocate_socket(&data
->cmd_sock
);
286 if (socket
== NULL
) {
291 socket
->registered
= 0;
292 socket
->lock
= &data
->lock
;
294 consumer_add_socket(socket
, output
);
298 socket
->type
= data
->type
;
300 DBG3("Consumer socket created (fd: %d) and added to output",
308 * Return the consumer socket from the given consumer output with the right
309 * bitness. On error, returns NULL.
311 * The caller MUST acquire a rcu read side lock and keep it until the socket
312 * object reference is not needed anymore.
314 struct consumer_socket
*consumer_find_socket_by_bitness(int bits
,
315 struct consumer_output
*consumer
)
318 struct consumer_socket
*socket
= NULL
;
322 consumer_fd
= uatomic_read(&ust_consumerd64_fd
);
325 consumer_fd
= uatomic_read(&ust_consumerd32_fd
);
332 socket
= consumer_find_socket(consumer_fd
, consumer
);
334 ERR("Consumer socket fd %d not found in consumer obj %p",
335 consumer_fd
, consumer
);
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.
347 struct consumer_socket
*consumer_find_socket(int key
,
348 struct consumer_output
*consumer
)
350 struct lttng_ht_iter iter
;
351 struct lttng_ht_node_ulong
*node
;
352 struct consumer_socket
*socket
= NULL
;
354 /* Negative keys are lookup failures */
355 if (key
< 0 || consumer
== NULL
) {
359 lttng_ht_lookup(consumer
->socks
, (void *)((unsigned long) key
),
361 node
= lttng_ht_iter_get_node_ulong(&iter
);
363 socket
= caa_container_of(node
, struct consumer_socket
, node
);
370 * Allocate a new consumer_socket and return the pointer.
372 struct consumer_socket
*consumer_allocate_socket(int *fd
)
374 struct consumer_socket
*socket
= NULL
;
378 socket
= zmalloc(sizeof(struct consumer_socket
));
379 if (socket
== NULL
) {
380 PERROR("zmalloc consumer socket");
385 lttng_ht_node_init_ulong(&socket
->node
, *fd
);
392 * Add consumer socket to consumer output object. Read side lock must be
393 * acquired before calling this function.
395 void consumer_add_socket(struct consumer_socket
*sock
,
396 struct consumer_output
*consumer
)
401 lttng_ht_add_unique_ulong(consumer
->socks
, &sock
->node
);
405 * Delte consumer socket to consumer output object. Read side lock must be
406 * acquired before calling this function.
408 void consumer_del_socket(struct consumer_socket
*sock
,
409 struct consumer_output
*consumer
)
412 struct lttng_ht_iter iter
;
417 iter
.iter
.node
= &sock
->node
.node
;
418 ret
= lttng_ht_del(consumer
->socks
, &iter
);
423 * RCU destroy call function.
425 static void destroy_socket_rcu(struct rcu_head
*head
)
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
);
436 * Destroy and free socket pointer in a call RCU. Read side lock must be
437 * acquired before calling this function.
439 void consumer_destroy_socket(struct consumer_socket
*sock
)
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,
448 if (sock
->registered
) {
449 DBG3("Consumer socket was registered. Closing fd %d", *sock
->fd_ptr
);
450 lttcomm_close_unix_sock(*sock
->fd_ptr
);
453 call_rcu(&sock
->node
.head
, destroy_socket_rcu
);
457 * Allocate and assign data to a consumer_output object.
459 * Return pointer to structure.
461 struct consumer_output
*consumer_create_output(enum consumer_dst_type type
)
463 struct consumer_output
*output
= NULL
;
465 output
= zmalloc(sizeof(struct consumer_output
));
466 if (output
== NULL
) {
467 PERROR("zmalloc consumer_output");
471 /* By default, consumer output is enabled */
474 output
->net_seq_index
= (uint64_t) -1ULL;
475 urcu_ref_init(&output
->ref
);
477 output
->socks
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
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.
488 void consumer_destroy_output_sockets(struct consumer_output
*obj
)
490 struct lttng_ht_iter iter
;
491 struct consumer_socket
*socket
;
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
);
506 * Delete the consumer_output object from the list and free the ptr.
508 * Should *NOT* be called with RCU read-side lock held.
510 static void consumer_release_output(struct urcu_ref
*ref
)
512 struct consumer_output
*obj
=
513 caa_container_of(ref
, struct consumer_output
, ref
);
515 consumer_destroy_output_sockets(obj
);
518 /* Finally destroy HT */
519 ht_cleanup_push(obj
->socks
);
526 * Get the consumer_output object.
528 void consumer_output_get(struct consumer_output
*obj
)
530 urcu_ref_get(&obj
->ref
);
534 * Put the consumer_output object.
536 * Should *NOT* be called with RCU read-side lock held.
538 void consumer_output_put(struct consumer_output
*obj
)
543 urcu_ref_put(&obj
->ref
, consumer_release_output
);
547 * Copy consumer output and returned the newly allocated copy.
549 * Should *NOT* be called with RCU read-side lock held.
551 struct consumer_output
*consumer_copy_output(struct consumer_output
*obj
)
554 struct consumer_output
*output
;
558 output
= consumer_create_output(obj
->type
);
559 if (output
== NULL
) {
562 output
->enabled
= obj
->enabled
;
563 output
->net_seq_index
= obj
->net_seq_index
;
564 memcpy(output
->subdir
, obj
->subdir
, PATH_MAX
);
565 output
->snapshot
= obj
->snapshot
;
566 memcpy(&output
->dst
, &obj
->dst
, sizeof(output
->dst
));
567 ret
= consumer_copy_sockets(output
, obj
);
575 consumer_output_put(output
);
580 * Copy consumer sockets from src to dst.
582 * Return 0 on success or else a negative value.
584 int consumer_copy_sockets(struct consumer_output
*dst
,
585 struct consumer_output
*src
)
588 struct lttng_ht_iter iter
;
589 struct consumer_socket
*socket
, *copy_sock
;
595 cds_lfht_for_each_entry(src
->socks
->ht
, &iter
.iter
, socket
, node
.node
) {
596 /* Ignore socket that are already there. */
597 copy_sock
= consumer_find_socket(*socket
->fd_ptr
, dst
);
602 /* Create new socket object. */
603 copy_sock
= consumer_allocate_socket(socket
->fd_ptr
);
604 if (copy_sock
== NULL
) {
610 copy_sock
->registered
= socket
->registered
;
612 * This is valid because this lock is shared accross all consumer
613 * object being the global lock of the consumer data structure of the
616 copy_sock
->lock
= socket
->lock
;
617 consumer_add_socket(copy_sock
, dst
);
626 * Set network URI to the consumer output object.
628 * Return 0 on success. Return 1 if the URI were equal. Else, negative value on
631 int consumer_set_network_uri(struct consumer_output
*obj
,
632 struct lttng_uri
*uri
)
635 char tmp_path
[PATH_MAX
];
636 char hostname
[HOST_NAME_MAX
];
637 struct lttng_uri
*dst_uri
= NULL
;
639 /* Code flow error safety net. */
643 switch (uri
->stype
) {
644 case LTTNG_STREAM_CONTROL
:
645 dst_uri
= &obj
->dst
.net
.control
;
646 obj
->dst
.net
.control_isset
= 1;
647 if (uri
->port
== 0) {
648 /* Assign default port. */
649 uri
->port
= DEFAULT_NETWORK_CONTROL_PORT
;
651 if (obj
->dst
.net
.data_isset
&& uri
->port
==
652 obj
->dst
.net
.data
.port
) {
653 ret
= -LTTNG_ERR_INVALID
;
657 DBG3("Consumer control URI set with port %d", uri
->port
);
659 case LTTNG_STREAM_DATA
:
660 dst_uri
= &obj
->dst
.net
.data
;
661 obj
->dst
.net
.data_isset
= 1;
662 if (uri
->port
== 0) {
663 /* Assign default port. */
664 uri
->port
= DEFAULT_NETWORK_DATA_PORT
;
666 if (obj
->dst
.net
.control_isset
&& uri
->port
==
667 obj
->dst
.net
.control
.port
) {
668 ret
= -LTTNG_ERR_INVALID
;
672 DBG3("Consumer data URI set with port %d", uri
->port
);
675 ERR("Set network uri type unknown %d", uri
->stype
);
676 ret
= -LTTNG_ERR_INVALID
;
680 ret
= uri_compare(dst_uri
, uri
);
682 /* Same URI, don't touch it and return success. */
683 DBG3("URI network compare are the same");
687 /* URIs were not equal, replacing it. */
688 memset(dst_uri
, 0, sizeof(struct lttng_uri
));
689 memcpy(dst_uri
, uri
, sizeof(struct lttng_uri
));
690 obj
->type
= CONSUMER_DST_NET
;
692 /* Handle subdir and add hostname in front. */
693 if (dst_uri
->stype
== LTTNG_STREAM_CONTROL
) {
694 /* Get hostname to append it in the pathname */
695 ret
= gethostname(hostname
, sizeof(hostname
));
697 PERROR("gethostname. Fallback on default localhost");
698 strncpy(hostname
, "localhost", sizeof(hostname
));
700 hostname
[sizeof(hostname
) - 1] = '\0';
702 /* Setup consumer subdir if none present in the control URI */
703 if (strlen(dst_uri
->subdir
) == 0) {
704 ret
= snprintf(tmp_path
, sizeof(tmp_path
), "%s/%s",
705 hostname
, obj
->subdir
);
707 ret
= snprintf(tmp_path
, sizeof(tmp_path
), "%s/%s",
708 hostname
, dst_uri
->subdir
);
711 PERROR("snprintf set consumer uri subdir");
712 ret
= -LTTNG_ERR_NOMEM
;
716 strncpy(obj
->subdir
, tmp_path
, sizeof(obj
->subdir
));
717 DBG3("Consumer set network uri subdir path %s", tmp_path
);
728 * Send file descriptor to consumer via sock.
730 int consumer_send_fds(struct consumer_socket
*sock
, int *fds
, size_t nb_fd
)
738 ret
= lttcomm_send_fds_unix_sock(*sock
->fd_ptr
, fds
, nb_fd
);
740 /* The above call will print a PERROR on error. */
741 DBG("Error when sending consumer fds on sock %d", *sock
->fd_ptr
);
745 ret
= consumer_recv_status_reply(sock
);
752 * Consumer send communication message structure to consumer.
754 int consumer_send_msg(struct consumer_socket
*sock
,
755 struct lttcomm_consumer_msg
*msg
)
762 ret
= consumer_socket_send(sock
, msg
, sizeof(struct lttcomm_consumer_msg
));
767 ret
= consumer_recv_status_reply(sock
);
774 * Consumer send channel communication message structure to consumer.
776 int consumer_send_channel(struct consumer_socket
*sock
,
777 struct lttcomm_consumer_msg
*msg
)
784 ret
= consumer_send_msg(sock
, msg
);
794 * Populate the given consumer msg structure with the ask_channel command
797 void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg
*msg
,
798 uint64_t subbuf_size
,
801 unsigned int switch_timer_interval
,
802 unsigned int read_timer_interval
,
803 unsigned int live_timer_interval
,
807 const char *pathname
,
815 uint64_t tracefile_size
,
816 uint64_t tracefile_count
,
817 uint64_t session_id_per_pid
,
818 unsigned int monitor
,
819 uint32_t ust_app_uid
)
823 /* Zeroed structure */
824 memset(msg
, 0, sizeof(struct lttcomm_consumer_msg
));
826 msg
->cmd_type
= LTTNG_CONSUMER_ASK_CHANNEL_CREATION
;
827 msg
->u
.ask_channel
.subbuf_size
= subbuf_size
;
828 msg
->u
.ask_channel
.num_subbuf
= num_subbuf
;
829 msg
->u
.ask_channel
.overwrite
= overwrite
;
830 msg
->u
.ask_channel
.switch_timer_interval
= switch_timer_interval
;
831 msg
->u
.ask_channel
.read_timer_interval
= read_timer_interval
;
832 msg
->u
.ask_channel
.live_timer_interval
= live_timer_interval
;
833 msg
->u
.ask_channel
.output
= output
;
834 msg
->u
.ask_channel
.type
= type
;
835 msg
->u
.ask_channel
.session_id
= session_id
;
836 msg
->u
.ask_channel
.session_id_per_pid
= session_id_per_pid
;
837 msg
->u
.ask_channel
.uid
= uid
;
838 msg
->u
.ask_channel
.gid
= gid
;
839 msg
->u
.ask_channel
.relayd_id
= relayd_id
;
840 msg
->u
.ask_channel
.key
= key
;
841 msg
->u
.ask_channel
.chan_id
= chan_id
;
842 msg
->u
.ask_channel
.tracefile_size
= tracefile_size
;
843 msg
->u
.ask_channel
.tracefile_count
= tracefile_count
;
844 msg
->u
.ask_channel
.monitor
= monitor
;
845 msg
->u
.ask_channel
.ust_app_uid
= ust_app_uid
;
847 memcpy(msg
->u
.ask_channel
.uuid
, uuid
, sizeof(msg
->u
.ask_channel
.uuid
));
850 strncpy(msg
->u
.ask_channel
.pathname
, pathname
,
851 sizeof(msg
->u
.ask_channel
.pathname
));
852 msg
->u
.ask_channel
.pathname
[sizeof(msg
->u
.ask_channel
.pathname
)-1] = '\0';
855 strncpy(msg
->u
.ask_channel
.name
, name
, sizeof(msg
->u
.ask_channel
.name
));
856 msg
->u
.ask_channel
.name
[sizeof(msg
->u
.ask_channel
.name
) - 1] = '\0';
860 * Init channel communication message structure.
862 void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg
*msg
,
863 enum lttng_consumer_command cmd
,
864 uint64_t channel_key
,
866 const char *pathname
,
871 unsigned int nb_init_streams
,
872 enum lttng_event_output output
,
874 uint64_t tracefile_size
,
875 uint64_t tracefile_count
,
876 unsigned int monitor
,
877 unsigned int live_timer_interval
)
881 /* Zeroed structure */
882 memset(msg
, 0, sizeof(struct lttcomm_consumer_msg
));
886 msg
->u
.channel
.channel_key
= channel_key
;
887 msg
->u
.channel
.session_id
= session_id
;
888 msg
->u
.channel
.uid
= uid
;
889 msg
->u
.channel
.gid
= gid
;
890 msg
->u
.channel
.relayd_id
= relayd_id
;
891 msg
->u
.channel
.nb_init_streams
= nb_init_streams
;
892 msg
->u
.channel
.output
= output
;
893 msg
->u
.channel
.type
= type
;
894 msg
->u
.channel
.tracefile_size
= tracefile_size
;
895 msg
->u
.channel
.tracefile_count
= tracefile_count
;
896 msg
->u
.channel
.monitor
= monitor
;
897 msg
->u
.channel
.live_timer_interval
= live_timer_interval
;
899 strncpy(msg
->u
.channel
.pathname
, pathname
,
900 sizeof(msg
->u
.channel
.pathname
));
901 msg
->u
.channel
.pathname
[sizeof(msg
->u
.channel
.pathname
) - 1] = '\0';
903 strncpy(msg
->u
.channel
.name
, name
, sizeof(msg
->u
.channel
.name
));
904 msg
->u
.channel
.name
[sizeof(msg
->u
.channel
.name
) - 1] = '\0';
908 * Init stream communication message structure.
910 void consumer_init_stream_comm_msg(struct lttcomm_consumer_msg
*msg
,
911 enum lttng_consumer_command cmd
,
912 uint64_t channel_key
,
918 memset(msg
, 0, sizeof(struct lttcomm_consumer_msg
));
921 msg
->u
.stream
.channel_key
= channel_key
;
922 msg
->u
.stream
.stream_key
= stream_key
;
923 msg
->u
.stream
.cpu
= cpu
;
926 void consumer_init_streams_sent_comm_msg(struct lttcomm_consumer_msg
*msg
,
927 enum lttng_consumer_command cmd
,
928 uint64_t channel_key
, uint64_t net_seq_idx
)
932 memset(msg
, 0, sizeof(struct lttcomm_consumer_msg
));
935 msg
->u
.sent_streams
.channel_key
= channel_key
;
936 msg
->u
.sent_streams
.net_seq_idx
= net_seq_idx
;
940 * Send stream communication structure to the consumer.
942 int consumer_send_stream(struct consumer_socket
*sock
,
943 struct consumer_output
*dst
, struct lttcomm_consumer_msg
*msg
,
944 int *fds
, size_t nb_fd
)
953 ret
= consumer_send_msg(sock
, msg
);
958 ret
= consumer_send_fds(sock
, fds
, nb_fd
);
968 * Send relayd socket to consumer associated with a session name.
970 * On success return positive value. On error, negative value.
972 int consumer_send_relayd_socket(struct consumer_socket
*consumer_sock
,
973 struct lttcomm_relayd_sock
*rsock
, struct consumer_output
*consumer
,
974 enum lttng_stream_type type
, uint64_t session_id
,
975 char *session_name
, char *hostname
, int session_live_timer
)
978 struct lttcomm_consumer_msg msg
;
980 /* Code flow error. Safety net. */
983 assert(consumer_sock
);
985 memset(&msg
, 0, sizeof(msg
));
986 /* Bail out if consumer is disabled */
987 if (!consumer
->enabled
) {
992 if (type
== LTTNG_STREAM_CONTROL
) {
993 ret
= relayd_create_session(rsock
,
994 &msg
.u
.relayd_sock
.relayd_session_id
,
995 session_name
, hostname
, session_live_timer
,
998 /* Close the control socket. */
999 (void) relayd_close(rsock
);
1004 msg
.cmd_type
= LTTNG_CONSUMER_ADD_RELAYD_SOCKET
;
1006 * Assign network consumer output index using the temporary consumer since
1007 * this call should only be made from within a set_consumer_uri() function
1008 * call in the session daemon.
1010 msg
.u
.relayd_sock
.net_index
= consumer
->net_seq_index
;
1011 msg
.u
.relayd_sock
.type
= type
;
1012 msg
.u
.relayd_sock
.session_id
= session_id
;
1013 memcpy(&msg
.u
.relayd_sock
.sock
, rsock
, sizeof(msg
.u
.relayd_sock
.sock
));
1015 DBG3("Sending relayd sock info to consumer on %d", *consumer_sock
->fd_ptr
);
1016 ret
= consumer_send_msg(consumer_sock
, &msg
);
1021 DBG3("Sending relayd socket file descriptor to consumer");
1022 ret
= consumer_send_fds(consumer_sock
, &rsock
->sock
.fd
, 1);
1027 DBG2("Consumer relayd socket sent");
1034 * Set consumer subdirectory using the session name and a generated datetime if
1035 * needed. This is appended to the current subdirectory.
1037 int consumer_set_subdir(struct consumer_output
*consumer
,
1038 const char *session_name
)
1041 unsigned int have_default_name
= 0;
1042 char datetime
[16], tmp_path
[PATH_MAX
];
1044 struct tm
*timeinfo
;
1047 assert(session_name
);
1049 memset(tmp_path
, 0, sizeof(tmp_path
));
1051 /* Flag if we have a default session. */
1052 if (strncmp(session_name
, DEFAULT_SESSION_NAME
"-",
1053 strlen(DEFAULT_SESSION_NAME
) + 1) == 0) {
1054 have_default_name
= 1;
1056 /* Get date and time for session path */
1058 timeinfo
= localtime(&rawtime
);
1059 strftime(datetime
, sizeof(datetime
), "%Y%m%d-%H%M%S", timeinfo
);
1062 if (have_default_name
) {
1063 ret
= snprintf(tmp_path
, sizeof(tmp_path
),
1064 "%s/%s", consumer
->subdir
, session_name
);
1066 ret
= snprintf(tmp_path
, sizeof(tmp_path
),
1067 "%s/%s-%s/", consumer
->subdir
, session_name
, datetime
);
1070 PERROR("snprintf session name date");
1074 strncpy(consumer
->subdir
, tmp_path
, sizeof(consumer
->subdir
));
1075 DBG2("Consumer subdir set to %s", consumer
->subdir
);
1082 * Ask the consumer if the data is ready to read (NOT pending) for the specific
1085 * This function has a different behavior with the consumer i.e. that it waits
1086 * for a reply from the consumer if yes or no the data is pending.
1088 int consumer_is_data_pending(uint64_t session_id
,
1089 struct consumer_output
*consumer
)
1092 int32_t ret_code
= 0; /* Default is that the data is NOT pending */
1093 struct consumer_socket
*socket
;
1094 struct lttng_ht_iter iter
;
1095 struct lttcomm_consumer_msg msg
;
1099 DBG3("Consumer data pending for id %" PRIu64
, session_id
);
1101 memset(&msg
, 0, sizeof(msg
));
1102 msg
.cmd_type
= LTTNG_CONSUMER_DATA_PENDING
;
1103 msg
.u
.data_pending
.session_id
= session_id
;
1105 /* Send command for each consumer */
1107 cds_lfht_for_each_entry(consumer
->socks
->ht
, &iter
.iter
, socket
,
1109 pthread_mutex_lock(socket
->lock
);
1110 ret
= consumer_socket_send(socket
, &msg
, sizeof(msg
));
1112 pthread_mutex_unlock(socket
->lock
);
1117 * No need for a recv reply status because the answer to the command is
1118 * the reply status message.
1121 ret
= consumer_socket_recv(socket
, &ret_code
, sizeof(ret_code
));
1123 pthread_mutex_unlock(socket
->lock
);
1126 pthread_mutex_unlock(socket
->lock
);
1128 if (ret_code
== 1) {
1134 DBG("Consumer data is %s pending for session id %" PRIu64
,
1135 ret_code
== 1 ? "" : "NOT", session_id
);
1144 * Send a flush command to consumer using the given channel key.
1146 * Return 0 on success else a negative value.
1148 int consumer_flush_channel(struct consumer_socket
*socket
, uint64_t key
)
1151 struct lttcomm_consumer_msg msg
;
1155 DBG2("Consumer flush channel key %" PRIu64
, key
);
1157 memset(&msg
, 0, sizeof(msg
));
1158 msg
.cmd_type
= LTTNG_CONSUMER_FLUSH_CHANNEL
;
1159 msg
.u
.flush_channel
.key
= 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 close metadata command to consumer using the given channel key.
1177 * Called with registry lock held.
1179 * Return 0 on success else a negative value.
1181 int consumer_close_metadata(struct consumer_socket
*socket
,
1182 uint64_t metadata_key
)
1185 struct lttcomm_consumer_msg msg
;
1189 DBG2("Consumer close metadata channel key %" PRIu64
, metadata_key
);
1191 memset(&msg
, 0, sizeof(msg
));
1192 msg
.cmd_type
= LTTNG_CONSUMER_CLOSE_METADATA
;
1193 msg
.u
.close_metadata
.key
= metadata_key
;
1195 pthread_mutex_lock(socket
->lock
);
1196 health_code_update();
1198 ret
= consumer_send_msg(socket
, &msg
);
1204 health_code_update();
1205 pthread_mutex_unlock(socket
->lock
);
1210 * Send a setup metdata command to consumer using the given channel key.
1212 * Return 0 on success else a negative value.
1214 int consumer_setup_metadata(struct consumer_socket
*socket
,
1215 uint64_t metadata_key
)
1218 struct lttcomm_consumer_msg msg
;
1222 DBG2("Consumer setup metadata channel key %" PRIu64
, metadata_key
);
1224 memset(&msg
, 0, sizeof(msg
));
1225 msg
.cmd_type
= LTTNG_CONSUMER_SETUP_METADATA
;
1226 msg
.u
.setup_metadata
.key
= metadata_key
;
1228 pthread_mutex_lock(socket
->lock
);
1229 health_code_update();
1231 ret
= consumer_send_msg(socket
, &msg
);
1237 health_code_update();
1238 pthread_mutex_unlock(socket
->lock
);
1243 * Send metadata string to consumer.
1244 * RCU read-side lock must be held to guarantee existence of socket.
1246 * Return 0 on success else a negative value.
1248 int consumer_push_metadata(struct consumer_socket
*socket
,
1249 uint64_t metadata_key
, char *metadata_str
, size_t len
,
1250 size_t target_offset
)
1253 struct lttcomm_consumer_msg msg
;
1257 DBG2("Consumer push metadata to consumer socket %d", *socket
->fd_ptr
);
1259 pthread_mutex_lock(socket
->lock
);
1261 memset(&msg
, 0, sizeof(msg
));
1262 msg
.cmd_type
= LTTNG_CONSUMER_PUSH_METADATA
;
1263 msg
.u
.push_metadata
.key
= metadata_key
;
1264 msg
.u
.push_metadata
.target_offset
= target_offset
;
1265 msg
.u
.push_metadata
.len
= len
;
1267 health_code_update();
1268 ret
= consumer_send_msg(socket
, &msg
);
1269 if (ret
< 0 || len
== 0) {
1273 DBG3("Consumer pushing metadata on sock %d of len %zu", *socket
->fd_ptr
,
1276 ret
= consumer_socket_send(socket
, metadata_str
, len
);
1281 health_code_update();
1282 ret
= consumer_recv_status_reply(socket
);
1288 pthread_mutex_unlock(socket
->lock
);
1289 health_code_update();
1294 * Ask the consumer to snapshot a specific channel using the key.
1296 * Return 0 on success or else a negative error.
1298 int consumer_snapshot_channel(struct consumer_socket
*socket
, uint64_t key
,
1299 struct snapshot_output
*output
, int metadata
, uid_t uid
, gid_t gid
,
1300 const char *session_path
, int wait
, uint64_t nb_packets_per_stream
)
1303 struct lttcomm_consumer_msg msg
;
1307 assert(output
->consumer
);
1309 DBG("Consumer snapshot channel key %" PRIu64
, key
);
1311 memset(&msg
, 0, sizeof(msg
));
1312 msg
.cmd_type
= LTTNG_CONSUMER_SNAPSHOT_CHANNEL
;
1313 msg
.u
.snapshot_channel
.key
= key
;
1314 msg
.u
.snapshot_channel
.nb_packets_per_stream
= nb_packets_per_stream
;
1315 msg
.u
.snapshot_channel
.metadata
= metadata
;
1317 if (output
->consumer
->type
== CONSUMER_DST_NET
) {
1318 msg
.u
.snapshot_channel
.relayd_id
= output
->consumer
->net_seq_index
;
1319 msg
.u
.snapshot_channel
.use_relayd
= 1;
1320 ret
= snprintf(msg
.u
.snapshot_channel
.pathname
,
1321 sizeof(msg
.u
.snapshot_channel
.pathname
),
1322 "%s/%s-%s-%" PRIu64
"%s", output
->consumer
->subdir
,
1323 output
->name
, output
->datetime
, output
->nb_snapshot
,
1326 ret
= -LTTNG_ERR_NOMEM
;
1330 ret
= snprintf(msg
.u
.snapshot_channel
.pathname
,
1331 sizeof(msg
.u
.snapshot_channel
.pathname
),
1332 "%s/%s-%s-%" PRIu64
"%s", output
->consumer
->dst
.trace_path
,
1333 output
->name
, output
->datetime
, output
->nb_snapshot
,
1336 ret
= -LTTNG_ERR_NOMEM
;
1339 msg
.u
.snapshot_channel
.relayd_id
= (uint64_t) -1ULL;
1341 /* Create directory. Ignore if exist. */
1342 ret
= run_as_mkdir_recursive(msg
.u
.snapshot_channel
.pathname
,
1343 S_IRWXU
| S_IRWXG
, uid
, gid
);
1345 if (ret
!= -EEXIST
) {
1346 ERR("Trace directory creation error");
1352 health_code_update();
1353 ret
= consumer_send_msg(socket
, &msg
);
1359 health_code_update();