2 * Copyright (C) 2017 - Julien Desfossez <jdesfossez@efficios.com>
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.
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
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.
21 #include <lttng/notification/channel-internal.h>
22 #include "rotation-thread.h"
25 * Key in channel_pending_rotate_ht to map a channel to a
26 * struct rotation_channel_info.
28 struct rotation_channel_key
{
30 enum lttng_domain_type domain
;
34 * Added in channel_pending_rotate_ht everytime we start the rotation of a
35 * channel. The consumer notifies the rotation thread with the channel_key to
36 * inform a rotation is complete, we use that information to lookup the related
37 * session from channel_pending_rotate_ht.
39 struct rotation_channel_info
{
41 struct rotation_channel_key channel_key
;
42 struct cds_lfht_node rotate_channels_ht_node
;
46 extern struct cds_lfht
*channel_pending_rotate_ht
;
47 extern struct lttng_notification_channel
*rotate_notification_channel
;
49 unsigned long hash_channel_key(struct rotation_channel_key
*key
);
51 /* session lock must be held by this function's caller. */
52 int rename_complete_chunk(struct ltt_session
*session
, time_t ts
);
54 int relay_rotate_pending(struct ltt_session
*session
, uint64_t chunk_id
);
57 * When we start the rotation of a channel, we add its information in
58 * channel_pending_rotate_ht. This is called in the context of
59 * thread_manage_client when the client asks for a rotation, in the context
60 * of the sessiond_timer thread when periodic rotations are enabled and from
61 * the rotation_thread when size-based rotations are enabled.
63 int rotate_add_channel_pending(uint64_t key
, enum lttng_domain_type domain
,
64 struct ltt_session
*session
);
67 * Subscribe/unsubscribe the notification_channel from the rotation_thread to
68 * session usage notifications to perform size-based rotations.
70 int subscribe_session_consumed_size_rotation(struct ltt_session
*session
,
72 struct notification_thread_handle
*notification_thread_handle
);
73 int unsubscribe_session_consumed_size_rotation(struct ltt_session
*session
,
74 struct notification_thread_handle
*notification_thread_handle
);