| 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 <common/compat/poll.hpp> |
| 14 | #include <common/fd-tracker/fd-tracker.hpp> |
| 15 | #include <common/hashtable/hashtable.hpp> |
| 16 | |
| 17 | #include <limits.h> |
| 18 | #include <urcu.h> |
| 19 | #include <urcu/wfcqueue.h> |
| 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, int size, const char *name); |
| 64 | |
| 65 | #endif /* LTTNG_RELAYD_H */ |