5 * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
6 * David Goulet <dgoulet@efficios.com>
7 * 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License, version 2 only, as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
18 * You should have received a copy of the GNU General Public License along with
19 * this program; if not, write to the Free Software Foundation, Inc., 51
20 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
26 #include <urcu/list.h>
28 #include <common/hashtable/hashtable.h>
31 #include "stream-fd.h"
34 * Represents a stream in the relay
37 uint64_t stream_handle
;
40 * reflock used to synchronize the closing of this stream.
41 * stream reflock nests inside viewer stream reflock.
42 * stream reflock nests inside index reflock.
44 pthread_mutex_t reflock
;
46 /* Back reference to trace. Protected by refcount on trace object. */
47 struct ctf_trace
*trace
;
50 * To protect from concurrent read/update. The viewer stream
51 * lock nests inside the stream lock. The stream lock nests
52 * inside the ctf_trace lock.
55 uint64_t prev_seq
; /* previous data sequence number encountered. */
56 uint64_t last_net_seq_num
; /* seq num to encounter before closing. */
58 /* FD on which to write the stream data. */
59 struct stream_fd
*stream_fd
;
60 /* FD on which to write the index data. */
61 struct stream_fd
*index_fd
;
66 /* On-disk circular buffer of tracefiles. */
67 uint64_t tracefile_size
;
68 uint64_t tracefile_size_current
;
69 uint64_t tracefile_count
;
70 uint64_t current_tracefile_id
;
72 uint64_t current_tracefile_seq
; /* Free-running counter. */
73 uint64_t oldest_tracefile_seq
; /* Free-running counter. */
75 /* To inform the viewer up to where it can go back in time. */
76 uint64_t oldest_tracefile_id
;
78 uint64_t total_index_received
;
80 bool closed
; /* Stream is closed. */
83 * Counts number of indexes in indexes_ht. Redundant info.
84 * Protected by stream lock.
86 int indexes_in_flight
;
87 struct lttng_ht
*indexes_ht
;
90 * If the stream is inactive, this field is updated with the
91 * live beacon timestamp end, when it is active, this
94 uint64_t beacon_ts_end
;
96 /* CTF stream ID, -1ULL when unset (first packet not received yet). */
97 uint64_t ctf_stream_id
;
99 /* Indicate if the stream was initialized for a data pending command. */
100 bool data_pending_check_done
;
102 /* Is this stream a metadata stream ? */
104 /* Amount of metadata received (bytes). */
105 uint64_t metadata_received
;
108 * Member of the stream list in struct ctf_trace.
109 * Updates are protected by the stream_list_lock.
110 * Traversals are protected by RCU.
112 struct cds_list_head stream_node
;
114 * Temporary list belonging to the connection until all streams
115 * are received for that connection.
116 * Member of the stream recv list in the connection.
117 * Updates are protected by the stream_recv_list_lock.
118 * Traversals are protected by RCU.
121 struct cds_list_head recv_node
;
122 bool published
; /* Protected by session lock. */
124 * Node of stream within global stream hash table.
126 struct lttng_ht_node_u64 node
;
127 struct rcu_head rcu_node
; /* For call_rcu teardown. */
130 struct relay_stream
*stream_create(struct ctf_trace
*trace
,
131 uint64_t stream_handle
, char *path_name
,
132 char *channel_name
, uint64_t tracefile_size
,
133 uint64_t tracefile_count
);
135 struct relay_stream
*stream_get_by_id(uint64_t stream_id
);
136 bool stream_get(struct relay_stream
*stream
);
137 void stream_put(struct relay_stream
*stream
);
138 void stream_close(struct relay_stream
*stream
);
139 void stream_publish(struct relay_stream
*stream
);
140 void print_relay_streams(void);
142 #endif /* _STREAM_H */