kernel-ctl: Expose kernel clear buffer operation
[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 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
ee0326c0 4 *
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5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License, version 2 only,
7 * as published by the Free Software Foundation.
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8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
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14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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17 */
18
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19#ifndef _LTTNG_KERNEL_CTL_H
20#define _LTTNG_KERNEL_CTL_H
ee0326c0 21
f3ed775e 22#include <lttng/lttng.h>
10a8a223 23#include <common/lttng-kernel.h>
4dbc372b 24#include <common/lttng-kernel-old.h>
00a62084 25#include <common/sessiond-comm/sessiond-comm.h> /* for struct lttng_filter_bytecode */
16421f6e 26
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27int kernctl_create_session(int fd);
28int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops);
f3ed775e 29int kernctl_create_channel(int fd, struct lttng_channel_attr *chops);
964ccb60 30int kernctl_create_stream(int fd);
9cb98350 31int kernctl_create_event(int fd, struct lttng_kernel_event *ev);
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32int kernctl_add_context(int fd, struct lttng_kernel_context *ctx);
33
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34int kernctl_enable(int fd);
35int kernctl_disable(int fd);
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36int kernctl_start_session(int fd);
37int kernctl_stop_session(int fd);
964ccb60 38
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39/* Apply on event FD */
40int kernctl_filter(int fd, struct lttng_filter_bytecode *filter);
1ab8c2ad 41int kernctl_add_callsite(int fd, struct lttng_kernel_event_callsite *callsite);
00a62084 42
8d609afd 43int kernctl_tracepoint_list(int fd);
d02666a9 44int kernctl_syscall_list(int fd);
8d609afd 45int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v);
c052142c 46int kernctl_tracer_abi_version(int fd, struct lttng_kernel_tracer_abi_version *v);
f3ed775e 47int kernctl_wait_quiescent(int fd);
16421f6e 48
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49/*
50 * kernctl_syscall_mask - Get syscall mask associated to a channel FD.
51 *
52 * The parameter @syscall_mask should initially be either NULL or point
53 * to memory allocated with malloc(3) or realloc(3). When the function
54 * returns, it will point to a memory area of the size required for the
55 * bitmask (using realloc(3) to resize the memory).
56 *
57 * It returns 0 if OK, -1 on error. In all cases (error and OK),
58 * @syscall_mask should be freed by the caller with free(3).
59 */
60int kernctl_syscall_mask(int fd, char **syscall_mask,
61 uint32_t *nr_bits);
62
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63/* Process ID tracking can be applied to session FD */
64int kernctl_track_pid(int fd, int pid);
65int kernctl_untrack_pid(int fd, int pid);
a5dfbb9d 66int kernctl_list_tracker_pids(int fd);
ccf10263 67
eded6438 68int kernctl_session_regenerate_metadata(int fd);
c2561365 69int kernctl_session_regenerate_statedump(int fd);
8ff4109e 70int kernctl_session_set_name(int fd, const char *name);
e04b2181 71int kernctl_session_set_creation_time(int fd, time_t time);
93ec662e 72
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73/* Buffer operations */
74
75/* For mmap mode, readable without "get" operation */
76int kernctl_get_mmap_len(int fd, unsigned long *len);
77int kernctl_get_max_subbuf_size(int fd, unsigned long *len);
78
79/*
80 * For mmap mode, operate on the current packet (between get/put or
81 * get_next/put_next).
82 */
83int kernctl_get_mmap_read_offset(int fd, unsigned long *len);
84int kernctl_get_subbuf_size(int fd, unsigned long *len);
85int kernctl_get_padded_subbuf_size(int fd, unsigned long *len);
86
87int kernctl_get_next_subbuf(int fd);
88int kernctl_put_next_subbuf(int fd);
89
90/* snapshot */
91int kernctl_snapshot(int fd);
b007ec59 92int kernctl_snapshot_sample_positions(int fd);
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93int kernctl_snapshot_get_consumed(int fd, unsigned long *pos);
94int kernctl_snapshot_get_produced(int fd, unsigned long *pos);
95int kernctl_get_subbuf(int fd, unsigned long *pos);
96int kernctl_put_subbuf(int fd);
97
98int kernctl_buffer_flush(int fd);
f22dd891 99int kernctl_buffer_flush_empty(int fd);
99930a9d 100int kernctl_buffer_clear(int fd);
93ec662e 101int kernctl_get_metadata_version(int fd, uint64_t *version);
8024cc8c 102int kernctl_metadata_cache_dump(int fd);
964ccb60 103
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104/* index */
105int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin);
106int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end);
107int kernctl_get_events_discarded(int fd, uint64_t *events_discarded);
108int kernctl_get_content_size(int fd, uint64_t *content_size);
109int kernctl_get_packet_size(int fd, uint64_t *packet_size);
110int kernctl_get_stream_id(int fd, uint64_t *stream_id);
d3e2ba59 111int kernctl_get_current_timestamp(int fd, uint64_t *ts);
fb83fe64 112int kernctl_get_sequence_number(int fd, uint64_t *seq);
000fa86f 113int kernctl_get_instance_id(int fd, uint64_t *seq);
309167d2 114
3bd1e081 115#endif /* _LTTNG_KERNEL_CTL_H */
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