projects / lttng-tools.git / blame
| Commit | Line | Data |
|---|---|---|
| 0c1b0f77 | 1 | /* |
| ab5be9fa | 2 | * Copyright (C) 2019 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 0c1b0f77 | 3 | * |
| ab5be9fa | 4 | * SPDX-License-Identifier: GPL-2.0-only |
| 0c1b0f77 | 5 | * |
| 0c1b0f77 JG |
6 | */ |
| 7 | ||
| 8 | #ifndef SESSIOND_TRACE_CHUNK_REGISTRY_H | |
| 9 | #define SESSIOND_TRACE_CHUNK_REGISTRY_H | |
| 10 | ||
| c9e313bc SM |
11 | #include <common/uuid.hpp> |
| 12 | #include <common/trace-chunk.hpp> | |
| 0c1b0f77 JG |
13 | #include <stdint.h> |
| 14 | ||
| 72c696e8 JG |
15 | /* |
| 16 | * A session trace chunk registry allows the relay daemon to share trace chunks | |
| 17 | * used by different "relay sessions" when they were created for the same | |
| 18 | * user-visible session daemon session. Tracing multiple domains (e.g. ust and | |
| 19 | * kernel) results in per-domain relay sessions being created. | |
| 20 | * | |
| 21 | * Sharing trace chunks, and their output directory more specifically, is | |
| 22 | * essential to properly implement session rotations. The sharing of output | |
| 23 | * directory handles allows directory renames to be performed once and without | |
| 24 | * races that would stem from from multiple renames. | |
| 25 | */ | |
| 0c1b0f77 JG |
26 | struct sessiond_trace_chunk_registry; |
| 27 | ||
| 28 | struct sessiond_trace_chunk_registry * | |
| 29 | sessiond_trace_chunk_registry_create(void); | |
| 30 | ||
| 31 | void sessiond_trace_chunk_registry_destroy( | |
| 32 | struct sessiond_trace_chunk_registry *sessiond_registry); | |
| 33 | ||
| 34 | int sessiond_trace_chunk_registry_session_created( | |
| 35 | struct sessiond_trace_chunk_registry *sessiond_registry, | |
| 36 | const lttng_uuid sessiond_uuid); | |
| 37 | ||
| 38 | int sessiond_trace_chunk_registry_session_destroyed( | |
| 39 | struct sessiond_trace_chunk_registry *sessiond_registry, | |
| 40 | const lttng_uuid sessiond_uuid); | |
| 41 | ||
| 42 | struct lttng_trace_chunk *sessiond_trace_chunk_registry_publish_chunk( | |
| 43 | struct sessiond_trace_chunk_registry *sessiond_registry, | |
| 44 | const lttng_uuid sessiond_uuid, uint64_t session_id, | |
| 45 | struct lttng_trace_chunk *chunk); | |
| 46 | ||
| 47 | struct lttng_trace_chunk * | |
| 48 | sessiond_trace_chunk_registry_get_anonymous_chunk( | |
| 49 | struct sessiond_trace_chunk_registry *sessiond_registry, | |
| 50 | const lttng_uuid sessiond_uuid, | |
| 51 | uint64_t session_id); | |
| 52 | ||
| 53 | struct lttng_trace_chunk * | |
| 54 | sessiond_trace_chunk_registry_get_chunk( | |
| 55 | struct sessiond_trace_chunk_registry *sessiond_registry, | |
| 56 | const lttng_uuid sessiond_uuid, | |
| 57 | uint64_t session_id, uint64_t chunk_id); | |
| 58 | ||
| 6b584c2e JG |
59 | int sessiond_trace_chunk_registry_chunk_exists( |
| 60 | struct sessiond_trace_chunk_registry *sessiond_registry, | |
| 61 | const lttng_uuid sessiond_uuid, | |
| 62 | uint64_t session_id, uint64_t chunk_id, bool *chunk_exists); | |
| 63 | ||
| 0c1b0f77 | 64 | #endif /* SESSIOND_TRACE_CHUNK_REGISTRY_H */ |