Channel rotate pipe between sessiond and the consumers
[lttng-tools.git] / src / bin / lttng-relayd / index.h
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1#ifndef _RELAY_INDEX_H
2#define _RELAY_INDEX_H
3
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4/*
5 * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
6 * David Goulet <dgoulet@efficios.com>
7591bab1 7 * 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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8 *
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.
12 *
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
16 * more details.
17 *
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.
21 */
22
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23#include <inttypes.h>
24#include <pthread.h>
25
26#include <common/hashtable/hashtable.h>
27#include <common/index/index.h>
28
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29#include "stream-fd.h"
30
31struct relay_stream;
32
1c20f0e2 33struct relay_index {
1c20f0e2 34 /*
7591bab1 35 * index lock nests inside stream lock.
1c20f0e2 36 */
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37 struct urcu_ref ref; /* Reference from getters. */
38 struct relay_stream *stream; /* Back ref to stream */
39
40 pthread_mutex_t lock;
41 /*
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42 * index file on which to write the index data. May differ from
43 * stream->index_file due to tracefile rotation.
7591bab1 44 */
f8f3885c 45 struct lttng_index_file *index_file;
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46
47 /* Index packet data. This is the data that is written on disk. */
50adc264 48 struct ctf_packet_index index_data;
1c20f0e2 49
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50 bool has_index_data;
51 bool flushed;
52 bool in_hash_table;
53
54 /*
55 * Node within indexes_ht that corresponds to this struct
56 * relay_index. Indexed by net_seq_num, which is unique for this
57 * index across the stream.
58 */
59 struct lttng_ht_node_u64 index_n;
60 struct rcu_head rcu_node; /* For call_rcu teardown. */
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61};
62
7591bab1 63struct relay_index *relay_index_get_by_id_or_create(struct relay_stream *stream,
1c20f0e2 64 uint64_t net_seq_num);
7591bab1 65void relay_index_put(struct relay_index *index);
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66int relay_index_set_file(struct relay_index *index,
67 struct lttng_index_file *index_file,
68 uint64_t data_offset);
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69int relay_index_set_data(struct relay_index *index,
70 const struct ctf_packet_index *data);
71int relay_index_try_flush(struct relay_index *index);
72
73void relay_index_close_all(struct relay_stream *stream);
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74void relay_index_close_partial_fd(struct relay_stream *stream);
75uint64_t relay_index_find_last(struct relay_stream *stream);
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76
77#endif /* _RELAY_INDEX_H */
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