src/bin/lttng-relayd/lttng-relayd.h

   1 #ifndef LTTNG_RELAYD_H
   2 #define LTTNG_RELAYD_H
   3
   4 /*
   5  * Copyright (C) 2012 Julien Desfossez <jdesfossez@efficios.com>
   6  * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
   7  * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  *
   9  * SPDX-License-Identifier: GPL-2.0-only
  10  *
  11  */
  12
  13 #include <limits.h>
  14 #include <urcu.h>
  15 #include <urcu/wfcqueue.h>
  16
  17 #include <common/hashtable/hashtable.h>
  18 #include <common/fd-tracker/fd-tracker.h>
  19
  20 struct sessiond_trace_chunk_registry;
  21
  22 /*
  23  * Queue used to enqueue relay requests
  24  */
  25 struct relay_conn_queue {
  26         struct cds_wfcq_head head;
  27         struct cds_wfcq_tail tail;
  28         int32_t futex;
  29 };
  30
  31 enum relay_group_output_by {
  32         RELAYD_GROUP_OUTPUT_BY_UNKNOWN,
  33         RELAYD_GROUP_OUTPUT_BY_HOST,
  34         RELAYD_GROUP_OUTPUT_BY_SESSION,
  35 };
  36
  37 /*
  38  * Contains stream indexed by ID. This is important since many commands lookup
  39  * streams only by ID thus also keeping them in this hash table makes the
  40  * search O(1).
  41  */
  42 extern struct lttng_ht *sessions_ht;
  43 extern struct lttng_ht *relay_streams_ht;
  44 extern struct lttng_ht *viewer_streams_ht;
  45 extern struct sessiond_trace_chunk_registry *sessiond_trace_chunk_registry;
  46
  47 extern char *opt_output_path;
  48 extern const char *tracing_group_name;
  49 extern const char * const config_section_name;
  50 extern enum relay_group_output_by opt_group_output_by;
  51
  52 extern int thread_quit_pipe[2];
  53
  54 extern struct fd_tracker *the_fd_tracker;
  55
  56 void lttng_relay_notify_ready(void);
  57 int lttng_relay_stop_threads(void);
  58
  59 #endif /* LTTNG_RELAYD_H */