trackers: support tracking feature
[lttng-tools.git] / src / bin / lttng-sessiond / kernel.h
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1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
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4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2 only,
6 * as published by the Free Software Foundation.
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7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
d14d33bf 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
12 *
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13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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16 */
17
18#ifndef _LTT_KERNEL_CTL_H
19#define _LTT_KERNEL_CTL_H
20
8c0faa1d 21#include "session.h"
6dc3064a 22#include "snapshot.h"
62499ad6 23#include "trace-kernel.h"
f34daff7 24
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25/*
26 * Default size for the event list when kernel_list_events is called. This size
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27 * value is based on the initial LTTng 2.0 version set of tracepoints.
28 *
29 * This is NOT an upper bound because if the real event list size is bigger,
30 * dynamic reallocation is performed.
2ef84c95 31 */
6725fe19 32#define KERNEL_EVENT_INIT_LIST_SIZE 64
55c9e7ca 33#define KERNEL_TRACKER_IDS_INIT_LIST_SIZE 64
2ef84c95 34
d65106b1 35int kernel_add_channel_context(struct ltt_kernel_channel *chan,
645328ae 36 struct ltt_kernel_context *ctx);
7d268848 37int kernel_create_session(struct ltt_session *session);
b082db07 38int kernel_create_channel(struct ltt_kernel_session *session,
fdd9eb17 39 struct lttng_channel *chan);
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40int kernel_create_event(struct lttng_event *ev, struct ltt_kernel_channel *channel,
41 char *filter_expression, struct lttng_filter_bytecode *filter);
26cc6b4e 42int kernel_disable_channel(struct ltt_kernel_channel *chan);
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43int kernel_disable_event(struct ltt_kernel_event *event);
44int kernel_enable_event(struct ltt_kernel_event *event);
d36b8583 45int kernel_enable_channel(struct ltt_kernel_channel *chan);
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46int kernel_track_id(enum lttng_tracker_type tracker_type,
47 struct ltt_kernel_session *session,
48 const struct lttng_tracker_id *id);
49int kernel_untrack_id(enum lttng_tracker_type tracker_type,
50 struct ltt_kernel_session *session,
51 const struct lttng_tracker_id *id);
a4b92340 52int kernel_open_metadata(struct ltt_kernel_session *session);
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53int kernel_open_metadata_stream(struct ltt_kernel_session *session);
54int kernel_open_channel_stream(struct ltt_kernel_channel *channel);
55int kernel_flush_buffer(struct ltt_kernel_channel *channel);
56int kernel_metadata_flush_buffer(int fd);
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57int kernel_start_session(struct ltt_kernel_session *session);
58int kernel_stop_session(struct ltt_kernel_session *session);
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59ssize_t kernel_list_events(struct lttng_event **event_list);
60void kernel_wait_quiescent(void);
61int kernel_validate_version(struct lttng_kernel_tracer_version *kernel_tracer_version,
88076e89 62 struct lttng_kernel_tracer_abi_version *kernel_tracer_abi_version);
2f77fc4b 63void kernel_destroy_session(struct ltt_kernel_session *ksess);
d070c424 64void kernel_free_session(struct ltt_kernel_session *ksess);
fb5f35b6 65void kernel_destroy_channel(struct ltt_kernel_channel *kchan);
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66enum lttng_error_code kernel_snapshot_record(
67 struct ltt_kernel_session *ksess,
348a81dc 68 const struct consumer_output *output, int wait,
d07ceecd 69 uint64_t nb_packets_per_stream);
834978fd 70int kernel_syscall_mask(int chan_fd, char **syscall_mask, uint32_t *nr_bits);
d5a1b7aa 71enum lttng_error_code kernel_rotate_session(struct ltt_session *session);
bca212a2 72enum lttng_error_code kernel_clear_session(struct ltt_session *session);
20fe2104 73
335a95b7 74int init_kernel_workarounds(void);
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75ssize_t kernel_list_tracker_ids(enum lttng_tracker_type tracker_type,
76 struct ltt_kernel_session *session,
77 struct lttng_tracker_id **_ids);
7d268848 78int kernel_supports_ring_buffer_snapshot_sample_positions(void);
a40a503f 79int kernel_supports_ring_buffer_packet_sequence_number(void);
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80int init_kernel_tracer(void);
81void cleanup_kernel_tracer(void);
82bool kernel_tracer_is_initialized(void);
335a95b7 83
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84enum lttng_error_code kernel_create_channel_subdirectories(
85 const struct ltt_kernel_session *ksess);
86
20fe2104 87#endif /* _LTT_KERNEL_CTL_H */
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