projects / lttng-tools.git / blame
| Commit | Line | Data |
|---|---|---|
| db66e574 JD |
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 | ||
| 90936dcf | 21 | #include <lttng/notification/channel-internal.h> |
| db66e574 JD |
22 | #include "rotation-thread.h" |
| 23 | ||
| 24 | /* | |
| 25 | * Key in channel_pending_rotate_ht to map a channel to a | |
| 26 | * struct rotation_channel_info. | |
| 27 | */ | |
| 28 | struct rotation_channel_key { | |
| 29 | uint64_t key; | |
| 30 | enum lttng_domain_type domain; | |
| 31 | }; | |
| 32 | ||
| 33 | /* | |
| 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. | |
| 38 | */ | |
| 39 | struct rotation_channel_info { | |
| 40 | uint64_t session_id; | |
| 41 | struct rotation_channel_key channel_key; | |
| 42 | struct cds_lfht_node rotate_channels_ht_node; | |
| 43 | }; | |
| 44 | ||
| 90936dcf | 45 | |
| db66e574 | 46 | extern struct cds_lfht *channel_pending_rotate_ht; |
| 90936dcf | 47 | extern struct lttng_notification_channel *rotate_notification_channel; |
| db66e574 JD |
48 | |
| 49 | unsigned long hash_channel_key(struct rotation_channel_key *key); | |
| 50 | ||
| 51 | /* session lock must be held by this function's caller. */ | |
| 52 | int rename_complete_chunk(struct ltt_session *session, time_t ts); | |
| 53 | ||
| d88744a4 JD |
54 | int relay_rotate_pending(struct ltt_session *session, uint64_t chunk_id); |
| 55 | ||
| 5c408ad8 JD |
56 | /* |
| 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. | |
| 62 | */ | |
| 63 | int rotate_add_channel_pending(uint64_t key, enum lttng_domain_type domain, | |
| 64 | struct ltt_session *session); | |
| 65 | ||
| 90936dcf JD |
66 | /* |
| 67 | * Subscribe/unsubscribe the notification_channel from the rotation_thread to | |
| 68 | * session usage notifications to perform size-based rotations. | |
| 69 | */ | |
| 70 | int subscribe_session_consumed_size_rotation(struct ltt_session *session, | |
| 71 | uint64_t size, | |
| 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); | |
| 75 | ||
| db66e574 | 76 | #endif /* ROTATE_H */ |