bin: compile lttng-sessiond as C++
[lttng-tools.git] / src / common / kernel-ctl / kernel-ctl.h
1 /*
2 * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 *
5 * SPDX-License-Identifier: GPL-2.0-only
6 *
7 */
8
9 #ifndef _LTTNG_KERNEL_CTL_H
10 #define _LTTNG_KERNEL_CTL_H
11
12 #include <stdbool.h>
13
14 #include <lttng/lttng.h>
15 #include <common/lttng-kernel.h>
16 #include <common/lttng-kernel-old.h>
17 #include <common/sessiond-comm/sessiond-comm.h> /* for struct lttng_filter_bytecode */
18
19 #ifdef __cplusplus
20 extern "C" {
21 #endif
22
23 int kernctl_create_session(int fd);
24 int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops);
25 int kernctl_create_channel(int fd, struct lttng_channel_attr *chops);
26 int kernctl_create_stream(int fd);
27 int kernctl_create_event(int fd, struct lttng_kernel_abi_event *ev);
28 int kernctl_add_context(int fd, struct lttng_kernel_abi_context *ctx);
29
30 int kernctl_enable(int fd);
31 int kernctl_disable(int fd);
32 int kernctl_start_session(int fd);
33 int kernctl_stop_session(int fd);
34
35 int kernctl_create_event_notifier_group(int fd);
36
37 /* Apply on event notifier_group file descriptor. */
38 int kernctl_create_event_notifier_group_notification_fd(int fd);
39 int kernctl_create_event_notifier_group_error_counter(int fd,
40 const struct lttng_kernel_abi_counter_conf *error_counter_conf);
41 int kernctl_create_event_notifier(int fd,
42 const struct lttng_kernel_abi_event_notifier *event_notifier);
43
44 int kernctl_counter_get_aggregate_value(int counter_fd,
45 struct lttng_kernel_abi_counter_aggregate *value);
46 int kernctl_counter_clear(int counter_fd,
47 struct lttng_kernel_abi_counter_clear *clear);
48
49 /* Apply on event file descriptor. */
50 int kernctl_filter(int fd, const struct lttng_bytecode *filter);
51 int kernctl_add_callsite(int fd, struct lttng_kernel_abi_event_callsite *callsite);
52 int kernctl_capture(int fd, const struct lttng_bytecode *capture);
53
54 int kernctl_tracepoint_list(int fd);
55 int kernctl_syscall_list(int fd);
56 int kernctl_tracer_version(int fd, struct lttng_kernel_abi_tracer_version *v);
57 int kernctl_tracer_abi_version(int fd, struct lttng_kernel_abi_tracer_abi_version *v);
58 int kernctl_wait_quiescent(int fd);
59
60 /*
61 * kernctl_syscall_mask - Get syscall mask associated to a channel file
62 * descriptor.
63 *
64 * The parameter @syscall_mask should initially be either NULL or point
65 * to memory allocated with malloc(3) or realloc(3). When the function
66 * returns, it will point to a memory area of the size required for the
67 * bitmask (using realloc(3) to resize the memory).
68 *
69 * It returns 0 if OK, -1 on error. In all cases (error and OK),
70 * @syscall_mask should be freed by the caller with free(3).
71 */
72 int kernctl_syscall_mask(int fd, char **syscall_mask,
73 uint32_t *nr_bits);
74
75 /* Process ID tracking can be applied to session file descriptor. */
76 int kernctl_track_pid(int fd, int pid);
77 int kernctl_untrack_pid(int fd, int pid);
78 int kernctl_list_tracker_pids(int fd);
79
80 int kernctl_track_id(int fd, enum lttng_process_attr process_attr, int id);
81 int kernctl_untrack_id(int fd, enum lttng_process_attr process_attr, int id);
82 int kernctl_list_tracker_ids(int fd, enum lttng_process_attr process_attr);
83
84 int kernctl_session_regenerate_metadata(int fd);
85 int kernctl_session_regenerate_statedump(int fd);
86 int kernctl_session_set_name(int fd, const char *name);
87 int kernctl_session_set_creation_time(int fd, time_t time);
88
89 /* Buffer operations */
90
91 /* For mmap mode, readable without "get" operation */
92 int kernctl_get_mmap_len(int fd, unsigned long *len);
93 int kernctl_get_max_subbuf_size(int fd, unsigned long *len);
94
95 /*
96 * For mmap mode, operate on the current packet (between get/put or
97 * get_next/put_next).
98 */
99 int kernctl_get_mmap_read_offset(int fd, unsigned long *len);
100 int kernctl_get_subbuf_size(int fd, unsigned long *len);
101 int kernctl_get_padded_subbuf_size(int fd, unsigned long *len);
102
103 int kernctl_get_next_subbuf(int fd);
104 int kernctl_put_next_subbuf(int fd);
105
106 /* snapshot */
107 int kernctl_snapshot(int fd);
108 int kernctl_snapshot_sample_positions(int fd);
109 int kernctl_snapshot_get_consumed(int fd, unsigned long *pos);
110 int kernctl_snapshot_get_produced(int fd, unsigned long *pos);
111 int kernctl_get_subbuf(int fd, unsigned long *pos);
112 int kernctl_put_subbuf(int fd);
113
114 int kernctl_buffer_flush(int fd);
115 int kernctl_buffer_flush_empty(int fd);
116 int kernctl_buffer_clear(int fd);
117 int kernctl_get_metadata_version(int fd, uint64_t *version);
118 int kernctl_metadata_cache_dump(int fd);
119 int kernctl_get_next_subbuf_metadata_check(int fd, bool *consistent);
120
121 /* index */
122 int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin);
123 int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end);
124 int kernctl_get_events_discarded(int fd, uint64_t *events_discarded);
125 int kernctl_get_content_size(int fd, uint64_t *content_size);
126 int kernctl_get_packet_size(int fd, uint64_t *packet_size);
127 int kernctl_get_stream_id(int fd, uint64_t *stream_id);
128 int kernctl_get_current_timestamp(int fd, uint64_t *ts);
129 int kernctl_get_sequence_number(int fd, uint64_t *seq);
130 int kernctl_get_instance_id(int fd, uint64_t *seq);
131
132 #ifdef __cplusplus
133 }
134 #endif
135
136 #endif /* _LTTNG_KERNEL_CTL_H */
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