Use lttng_event_{create, destroy} to manage lttng_event struct
[lttng-tools.git] / src / common / kernel-ctl / kernel-ctl.h
1 /*
2 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 *
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.
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 *
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.
17 */
18
19 #ifndef _LTTNG_KERNEL_CTL_H
20 #define _LTTNG_KERNEL_CTL_H
21
22 #include <lttng/lttng.h>
23 #include <common/lttng-kernel.h>
24 #include <common/lttng-kernel-old.h>
25 #include <common/sessiond-comm/sessiond-comm.h> /* for struct lttng_filter_bytecode */
26
27 int kernctl_create_session(int fd);
28 int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops);
29 int kernctl_create_channel(int fd, struct lttng_channel_attr *chops);
30 int kernctl_create_stream(int fd);
31 int kernctl_create_event(int fd, struct lttng_kernel_event *ev);
32 int kernctl_add_context(int fd, struct lttng_kernel_context *ctx);
33
34 int kernctl_enable(int fd);
35 int kernctl_disable(int fd);
36 int kernctl_start_session(int fd);
37 int kernctl_stop_session(int fd);
38
39 /* Apply on event FD */
40 int kernctl_filter(int fd, struct lttng_filter_bytecode *filter);
41
42 int kernctl_tracepoint_list(int fd);
43 int kernctl_syscall_list(int fd);
44 int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v);
45 int kernctl_tracer_abi_version(int fd, struct lttng_kernel_tracer_abi_version *v);
46 int kernctl_wait_quiescent(int fd);
47
48 /*
49 * kernctl_syscall_mask - Get syscall mask associated to a channel FD.
50 *
51 * The parameter @syscall_mask should initially be either NULL or point
52 * to memory allocated with malloc(3) or realloc(3). When the function
53 * returns, it will point to a memory area of the size required for the
54 * bitmask (using realloc(3) to resize the memory).
55 *
56 * It returns 0 if OK, -1 on error. In all cases (error and OK),
57 * @syscall_mask should be freed by the caller with free(3).
58 */
59 int kernctl_syscall_mask(int fd, char **syscall_mask,
60 uint32_t *nr_bits);
61
62 /* Process ID tracking can be applied to session FD */
63 int kernctl_track_pid(int fd, int pid);
64 int kernctl_untrack_pid(int fd, int pid);
65 int kernctl_list_tracker_pids(int fd);
66
67 int kernctl_session_regenerate_metadata(int fd);
68 int kernctl_session_regenerate_statedump(int fd);
69
70 /* Buffer operations */
71
72 /* For mmap mode, readable without "get" operation */
73 int kernctl_get_mmap_len(int fd, unsigned long *len);
74 int kernctl_get_max_subbuf_size(int fd, unsigned long *len);
75
76 /*
77 * For mmap mode, operate on the current packet (between get/put or
78 * get_next/put_next).
79 */
80 int kernctl_get_mmap_read_offset(int fd, unsigned long *len);
81 int kernctl_get_subbuf_size(int fd, unsigned long *len);
82 int kernctl_get_padded_subbuf_size(int fd, unsigned long *len);
83
84 int kernctl_get_next_subbuf(int fd);
85 int kernctl_put_next_subbuf(int fd);
86
87 /* snapshot */
88 int kernctl_snapshot(int fd);
89 int kernctl_snapshot_sample_positions(int fd);
90 int kernctl_snapshot_get_consumed(int fd, unsigned long *pos);
91 int kernctl_snapshot_get_produced(int fd, unsigned long *pos);
92 int kernctl_get_subbuf(int fd, unsigned long *pos);
93 int kernctl_put_subbuf(int fd);
94
95 int kernctl_buffer_flush(int fd);
96 int kernctl_buffer_flush_empty(int fd);
97 int kernctl_get_metadata_version(int fd, uint64_t *version);
98 int kernctl_metadata_cache_dump(int fd);
99
100 /* index */
101 int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin);
102 int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end);
103 int kernctl_get_events_discarded(int fd, uint64_t *events_discarded);
104 int kernctl_get_content_size(int fd, uint64_t *content_size);
105 int kernctl_get_packet_size(int fd, uint64_t *packet_size);
106 int kernctl_get_stream_id(int fd, uint64_t *stream_id);
107 int kernctl_get_current_timestamp(int fd, uint64_t *ts);
108 int kernctl_get_sequence_number(int fd, uint64_t *seq);
109 int kernctl_get_instance_id(int fd, uint64_t *seq);
110
111 #endif /* _LTTNG_KERNEL_CTL_H */
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