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
== LTTNG_OK
) {
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
!= LTTNG_OK
) {
187 *stream_count
= reply
.stream_count
;
194 * Send destroy relayd command to consumer.
196 * On success return positive value. On error, negative value.
198 int consumer_send_destroy_relayd(struct consumer_socket
*sock
,
199 struct consumer_output
*consumer
)
202 struct lttcomm_consumer_msg msg
;
207 DBG2("Sending destroy relayd command to consumer sock %d", *sock
->fd_ptr
);
209 msg
.cmd_type
= LTTNG_CONSUMER_DESTROY_RELAYD
;
210 msg
.u
.destroy_relayd
.net_seq_idx
= consumer
->net_seq_index
;
212 pthread_mutex_lock(sock
->lock
);
213 ret
= consumer_socket_send(sock
, &msg
, sizeof(msg
));
218 /* Don't check the return value. The caller will do it. */
219 ret
= consumer_recv_status_reply(sock
);
221 DBG2("Consumer send destroy relayd command done");
224 pthread_mutex_unlock(sock
->lock
);
229 * For each consumer socket in the consumer output object, send a destroy
232 void consumer_output_send_destroy_relayd(struct consumer_output
*consumer
)
234 struct lttng_ht_iter iter
;
235 struct consumer_socket
*socket
;
239 /* Destroy any relayd connection */
240 if (consumer
->type
== CONSUMER_DST_NET
) {
242 cds_lfht_for_each_entry(consumer
->socks
->ht
, &iter
.iter
, socket
,
246 /* Send destroy relayd command */
247 ret
= consumer_send_destroy_relayd(socket
, consumer
);
249 DBG("Unable to send destroy relayd command to consumer");
250 /* Continue since we MUST delete everything at this point. */
258 * From a consumer_data structure, allocate and add a consumer socket to the
261 * Return 0 on success, else negative value on error
263 int consumer_create_socket(struct consumer_data
*data
,
264 struct consumer_output
*output
)
267 struct consumer_socket
*socket
;
271 if (output
== NULL
|| data
->cmd_sock
< 0) {
273 * Not an error. Possible there is simply not spawned consumer or it's
274 * disabled for the tracing session asking the socket.
280 socket
= consumer_find_socket(data
->cmd_sock
, output
);
282 if (socket
== NULL
) {
283 socket
= consumer_allocate_socket(&data
->cmd_sock
);
284 if (socket
== NULL
) {
289 socket
->registered
= 0;
290 socket
->lock
= &data
->lock
;
292 consumer_add_socket(socket
, output
);
296 socket
->type
= data
->type
;
298 DBG3("Consumer socket created (fd: %d) and added to output",
306 * Return the consumer socket from the given consumer output with the right
307 * bitness. On error, returns NULL.
309 * The caller MUST acquire a rcu read side lock and keep it until the socket
310 * object reference is not needed anymore.
312 struct consumer_socket
*consumer_find_socket_by_bitness(int bits
,
313 struct consumer_output
*consumer
)
316 struct consumer_socket
*socket
= NULL
;
320 consumer_fd
= uatomic_read(&ust_consumerd64_fd
);
323 consumer_fd
= uatomic_read(&ust_consumerd32_fd
);
330 socket
= consumer_find_socket(consumer_fd
, consumer
);
332 ERR("Consumer socket fd %d not found in consumer obj %p",
333 consumer_fd
, consumer
);
341 * Find a consumer_socket in a consumer_output hashtable. Read side lock must
342 * be acquired before calling this function and across use of the
343 * returned consumer_socket.
345 struct consumer_socket
*consumer_find_socket(int key
,
346 struct consumer_output
*consumer
)
348 struct lttng_ht_iter iter
;
349 struct lttng_ht_node_ulong
*node
;
350 struct consumer_socket
*socket
= NULL
;
352 /* Negative keys are lookup failures */
353 if (key
< 0 || consumer
== NULL
) {
357 lttng_ht_lookup(consumer
->socks
, (void *)((unsigned long) key
),
359 node
= lttng_ht_iter_get_node_ulong(&iter
);
361 socket
= caa_container_of(node
, struct consumer_socket
, node
);
368 * Allocate a new consumer_socket and return the pointer.
370 struct consumer_socket
*consumer_allocate_socket(int *fd
)
372 struct consumer_socket
*socket
= NULL
;
376 socket
= zmalloc(sizeof(struct consumer_socket
));
377 if (socket
== NULL
) {
378 PERROR("zmalloc consumer socket");
383 lttng_ht_node_init_ulong(&socket
->node
, *fd
);
390 * Add consumer socket to consumer output object. Read side lock must be
391 * acquired before calling this function.
393 void consumer_add_socket(struct consumer_socket
*sock
,
394 struct consumer_output
*consumer
)
399 lttng_ht_add_unique_ulong(consumer
->socks
, &sock
->node
);
403 * Delte consumer socket to consumer output object. Read side lock must be
404 * acquired before calling this function.
406 void consumer_del_socket(struct consumer_socket
*sock
,
407 struct consumer_output
*consumer
)
410 struct lttng_ht_iter iter
;
415 iter
.iter
.node
= &sock
->node
.node
;
416 ret
= lttng_ht_del(consumer
->socks
, &iter
);
421 * RCU destroy call function.
423 static void destroy_socket_rcu(struct rcu_head
*head
)
425 struct lttng_ht_node_ulong
*node
=
426 caa_container_of(head
, struct lttng_ht_node_ulong
, head
);
427 struct consumer_socket
*socket
=
428 caa_container_of(node
, struct consumer_socket
, node
);
434 * Destroy and free socket pointer in a call RCU. Read side lock must be
435 * acquired before calling this function.
437 void consumer_destroy_socket(struct consumer_socket
*sock
)
442 * We DO NOT close the file descriptor here since it is global to the
443 * session daemon and is closed only if the consumer dies or a custom
444 * consumer was registered,
446 if (sock
->registered
) {
447 DBG3("Consumer socket was registered. Closing fd %d", *sock
->fd_ptr
);
448 lttcomm_close_unix_sock(*sock
->fd_ptr
);
451 call_rcu(&sock
->node
.head
, destroy_socket_rcu
);
455 * Allocate and assign data to a consumer_output object.
457 * Return pointer to structure.
459 struct consumer_output
*consumer_create_output(enum consumer_dst_type type
)
461 struct consumer_output
*output
= NULL
;
463 output
= zmalloc(sizeof(struct consumer_output
));
464 if (output
== NULL
) {
465 PERROR("zmalloc consumer_output");
469 /* By default, consumer output is enabled */
472 output
->net_seq_index
= (uint64_t) -1ULL;
474 output
->socks
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
481 * Iterate over the consumer output socket hash table and destroy them. The
482 * socket file descriptor are only closed if the consumer output was
483 * registered meaning it's an external consumer.
485 void consumer_destroy_output_sockets(struct consumer_output
*obj
)
487 struct lttng_ht_iter iter
;
488 struct consumer_socket
*socket
;
495 cds_lfht_for_each_entry(obj
->socks
->ht
, &iter
.iter
, socket
, node
.node
) {
496 consumer_del_socket(socket
, obj
);
497 consumer_destroy_socket(socket
);
503 * Delete the consumer_output object from the list and free the ptr.
505 * Should *NOT* be called with RCU read-side lock held.
507 void consumer_destroy_output(struct consumer_output
*obj
)
513 consumer_destroy_output_sockets(obj
);
516 /* Finally destroy HT */
517 ht_cleanup_push(obj
->socks
);
524 * Copy consumer output and returned the newly allocated copy.
526 * Should *NOT* be called with RCU read-side lock held.
528 struct consumer_output
*consumer_copy_output(struct consumer_output
*obj
)
531 struct lttng_ht
*tmp_ht_ptr
;
532 struct consumer_output
*output
;
536 output
= consumer_create_output(obj
->type
);
537 if (output
== NULL
) {
540 /* Avoid losing the HT reference after the memcpy() */
541 tmp_ht_ptr
= output
->socks
;
543 memcpy(output
, obj
, sizeof(struct consumer_output
));
545 /* Putting back the HT pointer and start copying socket(s). */
546 output
->socks
= tmp_ht_ptr
;
548 ret
= consumer_copy_sockets(output
, obj
);
557 consumer_destroy_output(output
);
562 * Copy consumer sockets from src to dst.
564 * Return 0 on success or else a negative value.
566 int consumer_copy_sockets(struct consumer_output
*dst
,
567 struct consumer_output
*src
)
570 struct lttng_ht_iter iter
;
571 struct consumer_socket
*socket
, *copy_sock
;
577 cds_lfht_for_each_entry(src
->socks
->ht
, &iter
.iter
, socket
, node
.node
) {
578 /* Ignore socket that are already there. */
579 copy_sock
= consumer_find_socket(*socket
->fd_ptr
, dst
);
584 /* Create new socket object. */
585 copy_sock
= consumer_allocate_socket(socket
->fd_ptr
);
586 if (copy_sock
== NULL
) {
592 copy_sock
->registered
= socket
->registered
;
594 * This is valid because this lock is shared accross all consumer
595 * object being the global lock of the consumer data structure of the
598 copy_sock
->lock
= socket
->lock
;
599 consumer_add_socket(copy_sock
, dst
);
608 * Set network URI to the consumer output object.
610 * Return 0 on success. Return 1 if the URI were equal. Else, negative value on
613 int consumer_set_network_uri(struct consumer_output
*obj
,
614 struct lttng_uri
*uri
)
617 char tmp_path
[PATH_MAX
];
618 char hostname
[HOST_NAME_MAX
];
619 struct lttng_uri
*dst_uri
= NULL
;
621 /* Code flow error safety net. */
625 switch (uri
->stype
) {
626 case LTTNG_STREAM_CONTROL
:
627 dst_uri
= &obj
->dst
.net
.control
;
628 obj
->dst
.net
.control_isset
= 1;
629 if (uri
->port
== 0) {
630 /* Assign default port. */
631 uri
->port
= DEFAULT_NETWORK_CONTROL_PORT
;
633 if (obj
->dst
.net
.data_isset
&& uri
->port
==
634 obj
->dst
.net
.data
.port
) {
635 ret
= -LTTNG_ERR_INVALID
;
639 DBG3("Consumer control URI set with port %d", uri
->port
);
641 case LTTNG_STREAM_DATA
:
642 dst_uri
= &obj
->dst
.net
.data
;
643 obj
->dst
.net
.data_isset
= 1;
644 if (uri
->port
== 0) {
645 /* Assign default port. */
646 uri
->port
= DEFAULT_NETWORK_DATA_PORT
;
648 if (obj
->dst
.net
.control_isset
&& uri
->port
==
649 obj
->dst
.net
.control
.port
) {
650 ret
= -LTTNG_ERR_INVALID
;
654 DBG3("Consumer data URI set with port %d", uri
->port
);
657 ERR("Set network uri type unknown %d", uri
->stype
);
658 ret
= -LTTNG_ERR_INVALID
;
662 ret
= uri_compare(dst_uri
, uri
);
664 /* Same URI, don't touch it and return success. */
665 DBG3("URI network compare are the same");
669 /* URIs were not equal, replacing it. */
670 memset(dst_uri
, 0, sizeof(struct lttng_uri
));
671 memcpy(dst_uri
, uri
, sizeof(struct lttng_uri
));
672 obj
->type
= CONSUMER_DST_NET
;
674 /* Handle subdir and add hostname in front. */
675 if (dst_uri
->stype
== LTTNG_STREAM_CONTROL
) {
676 /* Get hostname to append it in the pathname */
677 ret
= gethostname(hostname
, sizeof(hostname
));
679 PERROR("gethostname. Fallback on default localhost");
680 strncpy(hostname
, "localhost", sizeof(hostname
));
682 hostname
[sizeof(hostname
) - 1] = '\0';
684 /* Setup consumer subdir if none present in the control URI */
685 if (strlen(dst_uri
->subdir
) == 0) {
686 ret
= snprintf(tmp_path
, sizeof(tmp_path
), "%s/%s",
687 hostname
, obj
->subdir
);
689 ret
= snprintf(tmp_path
, sizeof(tmp_path
), "%s/%s",
690 hostname
, dst_uri
->subdir
);
693 PERROR("snprintf set consumer uri subdir");
694 ret
= -LTTNG_ERR_NOMEM
;
698 strncpy(obj
->subdir
, tmp_path
, sizeof(obj
->subdir
));
699 DBG3("Consumer set network uri subdir path %s", tmp_path
);
710 * Send file descriptor to consumer via sock.
712 int consumer_send_fds(struct consumer_socket
*sock
, int *fds
, size_t nb_fd
)
720 ret
= lttcomm_send_fds_unix_sock(*sock
->fd_ptr
, fds
, nb_fd
);
722 /* The above call will print a PERROR on error. */
723 DBG("Error when sending consumer fds on sock %d", *sock
->fd_ptr
);
727 ret
= consumer_recv_status_reply(sock
);
734 * Consumer send communication message structure to consumer.
736 int consumer_send_msg(struct consumer_socket
*sock
,
737 struct lttcomm_consumer_msg
*msg
)
744 ret
= consumer_socket_send(sock
, msg
, sizeof(struct lttcomm_consumer_msg
));
749 ret
= consumer_recv_status_reply(sock
);
756 * Consumer send channel communication message structure to consumer.
758 int consumer_send_channel(struct consumer_socket
*sock
,
759 struct lttcomm_consumer_msg
*msg
)
766 ret
= consumer_send_msg(sock
, msg
);
776 * Populate the given consumer msg structure with the ask_channel command
779 void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg
*msg
,
780 uint64_t subbuf_size
,
783 unsigned int switch_timer_interval
,
784 unsigned int read_timer_interval
,
785 unsigned int live_timer_interval
,
789 const char *pathname
,
797 uint64_t tracefile_size
,
798 uint64_t tracefile_count
,
799 uint64_t session_id_per_pid
,
800 unsigned int monitor
,
801 uint32_t ust_app_uid
)
805 /* Zeroed structure */
806 memset(msg
, 0, sizeof(struct lttcomm_consumer_msg
));
808 msg
->cmd_type
= LTTNG_CONSUMER_ASK_CHANNEL_CREATION
;
809 msg
->u
.ask_channel
.subbuf_size
= subbuf_size
;
810 msg
->u
.ask_channel
.num_subbuf
= num_subbuf
;
811 msg
->u
.ask_channel
.overwrite
= overwrite
;
812 msg
->u
.ask_channel
.switch_timer_interval
= switch_timer_interval
;
813 msg
->u
.ask_channel
.read_timer_interval
= read_timer_interval
;
814 msg
->u
.ask_channel
.live_timer_interval
= live_timer_interval
;
815 msg
->u
.ask_channel
.output
= output
;
816 msg
->u
.ask_channel
.type
= type
;
817 msg
->u
.ask_channel
.session_id
= session_id
;
818 msg
->u
.ask_channel
.session_id_per_pid
= session_id_per_pid
;
819 msg
->u
.ask_channel
.uid
= uid
;
820 msg
->u
.ask_channel
.gid
= gid
;
821 msg
->u
.ask_channel
.relayd_id
= relayd_id
;
822 msg
->u
.ask_channel
.key
= key
;
823 msg
->u
.ask_channel
.chan_id
= chan_id
;
824 msg
->u
.ask_channel
.tracefile_size
= tracefile_size
;
825 msg
->u
.ask_channel
.tracefile_count
= tracefile_count
;
826 msg
->u
.ask_channel
.monitor
= monitor
;
827 msg
->u
.ask_channel
.ust_app_uid
= ust_app_uid
;
829 memcpy(msg
->u
.ask_channel
.uuid
, uuid
, sizeof(msg
->u
.ask_channel
.uuid
));
832 strncpy(msg
->u
.ask_channel
.pathname
, pathname
,
833 sizeof(msg
->u
.ask_channel
.pathname
));
834 msg
->u
.ask_channel
.pathname
[sizeof(msg
->u
.ask_channel
.pathname
)-1] = '\0';
837 strncpy(msg
->u
.ask_channel
.name
, name
, sizeof(msg
->u
.ask_channel
.name
));
838 msg
->u
.ask_channel
.name
[sizeof(msg
->u
.ask_channel
.name
) - 1] = '\0';
842 * Init channel communication message structure.
844 void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg
*msg
,
845 enum lttng_consumer_command cmd
,
846 uint64_t channel_key
,
848 const char *pathname
,
853 unsigned int nb_init_streams
,
854 enum lttng_event_output output
,
856 uint64_t tracefile_size
,
857 uint64_t tracefile_count
,
858 unsigned int monitor
,
859 unsigned int live_timer_interval
)
863 /* Zeroed structure */
864 memset(msg
, 0, sizeof(struct lttcomm_consumer_msg
));
868 msg
->u
.channel
.channel_key
= channel_key
;
869 msg
->u
.channel
.session_id
= session_id
;
870 msg
->u
.channel
.uid
= uid
;
871 msg
->u
.channel
.gid
= gid
;
872 msg
->u
.channel
.relayd_id
= relayd_id
;
873 msg
->u
.channel
.nb_init_streams
= nb_init_streams
;
874 msg
->u
.channel
.output
= output
;
875 msg
->u
.channel
.type
= type
;
876 msg
->u
.channel
.tracefile_size
= tracefile_size
;
877 msg
->u
.channel
.tracefile_count
= tracefile_count
;
878 msg
->u
.channel
.monitor
= monitor
;
879 msg
->u
.channel
.live_timer_interval
= live_timer_interval
;
881 strncpy(msg
->u
.channel
.pathname
, pathname
,
882 sizeof(msg
->u
.channel
.pathname
));
883 msg
->u
.channel
.pathname
[sizeof(msg
->u
.channel
.pathname
) - 1] = '\0';
885 strncpy(msg
->u
.channel
.name
, name
, sizeof(msg
->u
.channel
.name
));
886 msg
->u
.channel
.name
[sizeof(msg
->u
.channel
.name
) - 1] = '\0';
890 * Init stream communication message structure.
892 void consumer_init_stream_comm_msg(struct lttcomm_consumer_msg
*msg
,
893 enum lttng_consumer_command cmd
,
894 uint64_t channel_key
,
900 memset(msg
, 0, sizeof(struct lttcomm_consumer_msg
));
903 msg
->u
.stream
.channel_key
= channel_key
;
904 msg
->u
.stream
.stream_key
= stream_key
;
905 msg
->u
.stream
.cpu
= cpu
;
909 * Send stream communication structure to the consumer.
911 int consumer_send_stream(struct consumer_socket
*sock
,
912 struct consumer_output
*dst
, struct lttcomm_consumer_msg
*msg
,
913 int *fds
, size_t nb_fd
)
922 ret
= consumer_send_msg(sock
, msg
);
927 ret
= consumer_send_fds(sock
, fds
, nb_fd
);
937 * Send relayd socket to consumer associated with a session name.
939 * On success return positive value. On error, negative value.
941 int consumer_send_relayd_socket(struct consumer_socket
*consumer_sock
,
942 struct lttcomm_relayd_sock
*rsock
, struct consumer_output
*consumer
,
943 enum lttng_stream_type type
, uint64_t session_id
,
944 char *session_name
, char *hostname
, int session_live_timer
)
947 struct lttcomm_consumer_msg msg
;
949 /* Code flow error. Safety net. */
952 assert(consumer_sock
);
954 /* Bail out if consumer is disabled */
955 if (!consumer
->enabled
) {
960 if (type
== LTTNG_STREAM_CONTROL
) {
961 ret
= relayd_create_session(rsock
,
962 &msg
.u
.relayd_sock
.relayd_session_id
,
963 session_name
, hostname
, session_live_timer
,
966 /* Close the control socket. */
967 (void) relayd_close(rsock
);
972 msg
.cmd_type
= LTTNG_CONSUMER_ADD_RELAYD_SOCKET
;
974 * Assign network consumer output index using the temporary consumer since
975 * this call should only be made from within a set_consumer_uri() function
976 * call in the session daemon.
978 msg
.u
.relayd_sock
.net_index
= consumer
->net_seq_index
;
979 msg
.u
.relayd_sock
.type
= type
;
980 msg
.u
.relayd_sock
.session_id
= session_id
;
981 memcpy(&msg
.u
.relayd_sock
.sock
, rsock
, sizeof(msg
.u
.relayd_sock
.sock
));
983 DBG3("Sending relayd sock info to consumer on %d", *consumer_sock
->fd_ptr
);
984 ret
= consumer_send_msg(consumer_sock
, &msg
);
989 DBG3("Sending relayd socket file descriptor to consumer");
990 ret
= consumer_send_fds(consumer_sock
, &rsock
->sock
.fd
, 1);
995 DBG2("Consumer relayd socket sent");
1002 * Set consumer subdirectory using the session name and a generated datetime if
1003 * needed. This is appended to the current subdirectory.
1005 int consumer_set_subdir(struct consumer_output
*consumer
,
1006 const char *session_name
)
1009 unsigned int have_default_name
= 0;
1010 char datetime
[16], tmp_path
[PATH_MAX
];
1012 struct tm
*timeinfo
;
1015 assert(session_name
);
1017 memset(tmp_path
, 0, sizeof(tmp_path
));
1019 /* Flag if we have a default session. */
1020 if (strncmp(session_name
, DEFAULT_SESSION_NAME
"-",
1021 strlen(DEFAULT_SESSION_NAME
) + 1) == 0) {
1022 have_default_name
= 1;
1024 /* Get date and time for session path */
1026 timeinfo
= localtime(&rawtime
);
1027 strftime(datetime
, sizeof(datetime
), "%Y%m%d-%H%M%S", timeinfo
);
1030 if (have_default_name
) {
1031 ret
= snprintf(tmp_path
, sizeof(tmp_path
),
1032 "%s/%s", consumer
->subdir
, session_name
);
1034 ret
= snprintf(tmp_path
, sizeof(tmp_path
),
1035 "%s/%s-%s/", consumer
->subdir
, session_name
, datetime
);
1038 PERROR("snprintf session name date");
1042 strncpy(consumer
->subdir
, tmp_path
, sizeof(consumer
->subdir
));
1043 DBG2("Consumer subdir set to %s", consumer
->subdir
);
1050 * Ask the consumer if the data is ready to read (NOT pending) for the specific
1053 * This function has a different behavior with the consumer i.e. that it waits
1054 * for a reply from the consumer if yes or no the data is pending.
1056 int consumer_is_data_pending(uint64_t session_id
,
1057 struct consumer_output
*consumer
)
1060 int32_t ret_code
= 0; /* Default is that the data is NOT pending */
1061 struct consumer_socket
*socket
;
1062 struct lttng_ht_iter iter
;
1063 struct lttcomm_consumer_msg msg
;
1067 msg
.cmd_type
= LTTNG_CONSUMER_DATA_PENDING
;
1069 msg
.u
.data_pending
.session_id
= session_id
;
1071 DBG3("Consumer data pending for id %" PRIu64
, session_id
);
1073 /* Send command for each consumer */
1075 cds_lfht_for_each_entry(consumer
->socks
->ht
, &iter
.iter
, socket
,
1077 pthread_mutex_lock(socket
->lock
);
1078 ret
= consumer_socket_send(socket
, &msg
, sizeof(msg
));
1080 pthread_mutex_unlock(socket
->lock
);
1085 * No need for a recv reply status because the answer to the command is
1086 * the reply status message.
1089 ret
= consumer_socket_recv(socket
, &ret_code
, sizeof(ret_code
));
1091 pthread_mutex_unlock(socket
->lock
);
1094 pthread_mutex_unlock(socket
->lock
);
1096 if (ret_code
== 1) {
1102 DBG("Consumer data is %s pending for session id %" PRIu64
,
1103 ret_code
== 1 ? "" : "NOT", session_id
);
1112 * Send a flush command to consumer using the given channel key.
1114 * Return 0 on success else a negative value.
1116 int consumer_flush_channel(struct consumer_socket
*socket
, uint64_t key
)
1119 struct lttcomm_consumer_msg msg
;
1123 DBG2("Consumer flush channel key %" PRIu64
, key
);
1125 msg
.cmd_type
= LTTNG_CONSUMER_FLUSH_CHANNEL
;
1126 msg
.u
.flush_channel
.key
= key
;
1128 pthread_mutex_lock(socket
->lock
);
1129 health_code_update();
1131 ret
= consumer_send_msg(socket
, &msg
);
1137 health_code_update();
1138 pthread_mutex_unlock(socket
->lock
);
1143 * Send a close metdata command to consumer using the given channel key.
1145 * Return 0 on success else a negative value.
1147 int consumer_close_metadata(struct consumer_socket
*socket
,
1148 uint64_t metadata_key
)
1151 struct lttcomm_consumer_msg msg
;
1155 DBG2("Consumer close metadata channel key %" PRIu64
, metadata_key
);
1157 msg
.cmd_type
= LTTNG_CONSUMER_CLOSE_METADATA
;
1158 msg
.u
.close_metadata
.key
= metadata_key
;
1160 pthread_mutex_lock(socket
->lock
);
1161 health_code_update();
1163 ret
= consumer_send_msg(socket
, &msg
);
1169 health_code_update();
1170 pthread_mutex_unlock(socket
->lock
);
1175 * Send a setup metdata command to consumer using the given channel key.
1177 * Return 0 on success else a negative value.
1179 int consumer_setup_metadata(struct consumer_socket
*socket
,
1180 uint64_t metadata_key
)
1183 struct lttcomm_consumer_msg msg
;
1187 DBG2("Consumer setup metadata channel key %" PRIu64
, metadata_key
);
1189 msg
.cmd_type
= LTTNG_CONSUMER_SETUP_METADATA
;
1190 msg
.u
.setup_metadata
.key
= metadata_key
;
1192 pthread_mutex_lock(socket
->lock
);
1193 health_code_update();
1195 ret
= consumer_send_msg(socket
, &msg
);
1201 health_code_update();
1202 pthread_mutex_unlock(socket
->lock
);
1207 * Send metadata string to consumer. Socket lock MUST be acquired.
1209 * Return 0 on success else a negative value.
1211 int consumer_push_metadata(struct consumer_socket
*socket
,
1212 uint64_t metadata_key
, char *metadata_str
, size_t len
,
1213 size_t target_offset
)
1216 struct lttcomm_consumer_msg msg
;
1220 DBG2("Consumer push metadata to consumer socket %d", *socket
->fd_ptr
);
1222 msg
.cmd_type
= LTTNG_CONSUMER_PUSH_METADATA
;
1223 msg
.u
.push_metadata
.key
= metadata_key
;
1224 msg
.u
.push_metadata
.target_offset
= target_offset
;
1225 msg
.u
.push_metadata
.len
= len
;
1227 health_code_update();
1228 ret
= consumer_send_msg(socket
, &msg
);
1229 if (ret
< 0 || len
== 0) {
1233 DBG3("Consumer pushing metadata on sock %d of len %zu", *socket
->fd_ptr
,
1236 ret
= consumer_socket_send(socket
, metadata_str
, len
);
1241 health_code_update();
1242 ret
= consumer_recv_status_reply(socket
);
1248 health_code_update();
1253 * Ask the consumer to snapshot a specific channel using the key.
1255 * Return 0 on success or else a negative error.
1257 int consumer_snapshot_channel(struct consumer_socket
*socket
, uint64_t key
,
1258 struct snapshot_output
*output
, int metadata
, uid_t uid
, gid_t gid
,
1259 const char *session_path
, int wait
, int max_stream_size
)
1262 struct lttcomm_consumer_msg msg
;
1266 assert(output
->consumer
);
1268 DBG("Consumer snapshot channel key %" PRIu64
, key
);
1270 memset(&msg
, 0, sizeof(msg
));
1271 msg
.cmd_type
= LTTNG_CONSUMER_SNAPSHOT_CHANNEL
;
1272 msg
.u
.snapshot_channel
.key
= key
;
1273 msg
.u
.snapshot_channel
.max_stream_size
= max_stream_size
;
1274 msg
.u
.snapshot_channel
.metadata
= metadata
;
1276 if (output
->consumer
->type
== CONSUMER_DST_NET
) {
1277 msg
.u
.snapshot_channel
.relayd_id
= output
->consumer
->net_seq_index
;
1278 msg
.u
.snapshot_channel
.use_relayd
= 1;
1279 ret
= snprintf(msg
.u
.snapshot_channel
.pathname
,
1280 sizeof(msg
.u
.snapshot_channel
.pathname
),
1281 "%s/%s-%s-%" PRIu64
"%s", output
->consumer
->subdir
,
1282 output
->name
, output
->datetime
, output
->nb_snapshot
,
1285 ret
= -LTTNG_ERR_NOMEM
;
1289 ret
= snprintf(msg
.u
.snapshot_channel
.pathname
,
1290 sizeof(msg
.u
.snapshot_channel
.pathname
),
1291 "%s/%s-%s-%" PRIu64
"%s", output
->consumer
->dst
.trace_path
,
1292 output
->name
, output
->datetime
, output
->nb_snapshot
,
1295 ret
= -LTTNG_ERR_NOMEM
;
1298 msg
.u
.snapshot_channel
.relayd_id
= (uint64_t) -1ULL;
1300 /* Create directory. Ignore if exist. */
1301 ret
= run_as_mkdir_recursive(msg
.u
.snapshot_channel
.pathname
,
1302 S_IRWXU
| S_IRWXG
, uid
, gid
);
1304 if (ret
!= -EEXIST
) {
1305 ERR("Trace directory creation error");
1311 health_code_update();
1312 ret
= consumer_send_msg(socket
, &msg
);
1318 health_code_update();