src/bin/lttng-relayd/lttng-relayd.hpp

   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/compat/poll.hpp>
  18 #include <common/hashtable/hashtable.hpp>
  19 #include <common/fd-tracker/fd-tracker.hpp>
  20
  21 struct sessiond_trace_chunk_registry;
  22
  23 /*
  24  * Queue used to enqueue relay requests
  25  */
  26 struct relay_conn_queue {
  27         struct cds_wfcq_head head;
  28         struct cds_wfcq_tail tail;
  29         int32_t futex;
  30 };
  31
  32 enum relay_group_output_by {
  33         RELAYD_GROUP_OUTPUT_BY_UNKNOWN,
  34         RELAYD_GROUP_OUTPUT_BY_HOST,
  35         RELAYD_GROUP_OUTPUT_BY_SESSION,
  36 };
  37
  38 /*
  39  * Contains stream indexed by ID. This is important since many commands lookup
  40  * streams only by ID thus also keeping them in this hash table makes the
  41  * search O(1).
  42  */
  43 extern struct lttng_ht *sessions_ht;
  44 extern struct lttng_ht *relay_streams_ht;
  45 extern struct lttng_ht *viewer_streams_ht;
  46 extern struct sessiond_trace_chunk_registry *sessiond_trace_chunk_registry;
  47
  48 extern char *opt_output_path;
  49 extern const char *tracing_group_name;
  50 extern const char * const config_section_name;
  51 extern enum relay_group_output_by opt_group_output_by;
  52
  53 extern struct fd_tracker *the_fd_tracker;
  54
  55 void lttng_relay_notify_ready(void);
  56 int lttng_relay_stop_threads(void);
  57
  58 int relayd_init_thread_quit_pipe(void);
  59 int relayd_notify_thread_quit_pipe(void);
  60 void relayd_close_thread_quit_pipe(void);
  61 bool relayd_is_thread_quit_pipe(const int fd);
  62
  63 int create_named_thread_poll_set(struct lttng_poll_event *events,
  64                 int size, const char *name);
  65
  66 #endif /* LTTNG_RELAYD_H */