kernel: load lttng-ring-buffer-event-notifier-client module
[lttng-tools.git] / src / common / kernel-ctl / kernel-ctl.h
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ee0326c0 1/*
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2 * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
ee0326c0 4 *
ab5be9fa 5 * SPDX-License-Identifier: GPL-2.0-only
ee0326c0 6 *
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7 */
8
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9#ifndef _LTTNG_KERNEL_CTL_H
10#define _LTTNG_KERNEL_CTL_H
ee0326c0 11
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12#include <stdbool.h>
13
f3ed775e 14#include <lttng/lttng.h>
10a8a223 15#include <common/lttng-kernel.h>
4dbc372b 16#include <common/lttng-kernel-old.h>
00a62084 17#include <common/sessiond-comm/sessiond-comm.h> /* for struct lttng_filter_bytecode */
16421f6e 18
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19int kernctl_create_session(int fd);
20int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops);
f3ed775e 21int kernctl_create_channel(int fd, struct lttng_channel_attr *chops);
964ccb60 22int kernctl_create_stream(int fd);
9cb98350 23int kernctl_create_event(int fd, struct lttng_kernel_event *ev);
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24int kernctl_add_context(int fd, struct lttng_kernel_context *ctx);
25
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26int kernctl_enable(int fd);
27int kernctl_disable(int fd);
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28int kernctl_start_session(int fd);
29int kernctl_stop_session(int fd);
964ccb60 30
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31/* Apply on event FD */
32int kernctl_filter(int fd, struct lttng_filter_bytecode *filter);
1ab8c2ad 33int kernctl_add_callsite(int fd, struct lttng_kernel_event_callsite *callsite);
00a62084 34
8d609afd 35int kernctl_tracepoint_list(int fd);
d02666a9 36int kernctl_syscall_list(int fd);
8d609afd 37int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v);
c052142c 38int kernctl_tracer_abi_version(int fd, struct lttng_kernel_tracer_abi_version *v);
f3ed775e 39int kernctl_wait_quiescent(int fd);
16421f6e 40
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41/*
42 * kernctl_syscall_mask - Get syscall mask associated to a channel FD.
43 *
44 * The parameter @syscall_mask should initially be either NULL or point
45 * to memory allocated with malloc(3) or realloc(3). When the function
46 * returns, it will point to a memory area of the size required for the
47 * bitmask (using realloc(3) to resize the memory).
48 *
49 * It returns 0 if OK, -1 on error. In all cases (error and OK),
50 * @syscall_mask should be freed by the caller with free(3).
51 */
52int kernctl_syscall_mask(int fd, char **syscall_mask,
53 uint32_t *nr_bits);
54
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55/* Process ID tracking can be applied to session FD */
56int kernctl_track_pid(int fd, int pid);
57int kernctl_untrack_pid(int fd, int pid);
a5dfbb9d 58int kernctl_list_tracker_pids(int fd);
ccf10263 59
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60int kernctl_track_id(int fd, enum lttng_process_attr process_attr, int id);
61int kernctl_untrack_id(int fd, enum lttng_process_attr process_attr, int id);
62int kernctl_list_tracker_ids(int fd, enum lttng_process_attr process_attr);
d01c0e56 63
eded6438 64int kernctl_session_regenerate_metadata(int fd);
c2561365 65int kernctl_session_regenerate_statedump(int fd);
8ff4109e 66int kernctl_session_set_name(int fd, const char *name);
e04b2181 67int kernctl_session_set_creation_time(int fd, time_t time);
93ec662e 68
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69/* Buffer operations */
70
71/* For mmap mode, readable without "get" operation */
72int kernctl_get_mmap_len(int fd, unsigned long *len);
73int kernctl_get_max_subbuf_size(int fd, unsigned long *len);
74
75/*
76 * For mmap mode, operate on the current packet (between get/put or
77 * get_next/put_next).
78 */
79int kernctl_get_mmap_read_offset(int fd, unsigned long *len);
80int kernctl_get_subbuf_size(int fd, unsigned long *len);
81int kernctl_get_padded_subbuf_size(int fd, unsigned long *len);
82
83int kernctl_get_next_subbuf(int fd);
84int kernctl_put_next_subbuf(int fd);
85
86/* snapshot */
87int kernctl_snapshot(int fd);
b007ec59 88int kernctl_snapshot_sample_positions(int fd);
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89int kernctl_snapshot_get_consumed(int fd, unsigned long *pos);
90int kernctl_snapshot_get_produced(int fd, unsigned long *pos);
91int kernctl_get_subbuf(int fd, unsigned long *pos);
92int kernctl_put_subbuf(int fd);
93
94int kernctl_buffer_flush(int fd);
f22dd891 95int kernctl_buffer_flush_empty(int fd);
99930a9d 96int kernctl_buffer_clear(int fd);
93ec662e 97int kernctl_get_metadata_version(int fd, uint64_t *version);
8024cc8c 98int kernctl_metadata_cache_dump(int fd);
41dc93d9 99int kernctl_get_next_subbuf_metadata_check(int fd, bool *consistent);
964ccb60 100
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101/* index */
102int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin);
103int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end);
104int kernctl_get_events_discarded(int fd, uint64_t *events_discarded);
105int kernctl_get_content_size(int fd, uint64_t *content_size);
106int kernctl_get_packet_size(int fd, uint64_t *packet_size);
107int kernctl_get_stream_id(int fd, uint64_t *stream_id);
d3e2ba59 108int kernctl_get_current_timestamp(int fd, uint64_t *ts);
fb83fe64 109int kernctl_get_sequence_number(int fd, uint64_t *seq);
000fa86f 110int kernctl_get_instance_id(int fd, uint64_t *seq);
309167d2 111
3bd1e081 112#endif /* _LTTNG_KERNEL_CTL_H */
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