Sessiond rotation thread
[lttng-tools.git] / src / bin / lttng-sessiond / rotate.h
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1/*
2 * Copyright (C) 2017 - Julien Desfossez <jdesfossez@efficios.com>
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License, version 2 only, as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 51
15 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16 */
17
18#ifndef ROTATE_H
19#define ROTATE_H
20
21#include "rotation-thread.h"
22
23/*
24 * Key in channel_pending_rotate_ht to map a channel to a
25 * struct rotation_channel_info.
26 */
27struct rotation_channel_key {
28 uint64_t key;
29 enum lttng_domain_type domain;
30};
31
32/*
33 * Added in channel_pending_rotate_ht everytime we start the rotation of a
34 * channel. The consumer notifies the rotation thread with the channel_key to
35 * inform a rotation is complete, we use that information to lookup the related
36 * session from channel_pending_rotate_ht.
37 */
38struct rotation_channel_info {
39 uint64_t session_id;
40 struct rotation_channel_key channel_key;
41 struct cds_lfht_node rotate_channels_ht_node;
42};
43
44extern struct cds_lfht *channel_pending_rotate_ht;
45
46unsigned long hash_channel_key(struct rotation_channel_key *key);
47
48/* session lock must be held by this function's caller. */
49int rename_complete_chunk(struct ltt_session *session, time_t ts);
50
51#endif /* ROTATE_H */
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