2 * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
5 * SPDX-License-Identifier: GPL-2.0-only
9 #ifndef _LTTNG_KERNEL_CTL_H
10 #define _LTTNG_KERNEL_CTL_H
12 #include <lttng/lttng.h>
13 #include <common/lttng-kernel.h>
14 #include <common/lttng-kernel-old.h>
15 #include <common/sessiond-comm/sessiond-comm.h> /* for struct lttng_filter_bytecode */
17 int kernctl_create_session(int fd
);
18 int kernctl_open_metadata(int fd
, struct lttng_channel_attr
*chops
);
19 int kernctl_create_channel(int fd
, struct lttng_channel_attr
*chops
);
20 int kernctl_create_stream(int fd
);
21 int kernctl_create_event(int fd
, struct lttng_kernel_event
*ev
);
22 int kernctl_add_context(int fd
, struct lttng_kernel_context
*ctx
);
24 int kernctl_enable(int fd
);
25 int kernctl_disable(int fd
);
26 int kernctl_start_session(int fd
);
27 int kernctl_stop_session(int fd
);
29 /* Apply on event FD */
30 int kernctl_filter(int fd
, struct lttng_filter_bytecode
*filter
);
31 int kernctl_add_callsite(int fd
, struct lttng_kernel_event_callsite
*callsite
);
33 int kernctl_tracepoint_list(int fd
);
34 int kernctl_syscall_list(int fd
);
35 int kernctl_tracer_version(int fd
, struct lttng_kernel_tracer_version
*v
);
36 int kernctl_tracer_abi_version(int fd
, struct lttng_kernel_tracer_abi_version
*v
);
37 int kernctl_wait_quiescent(int fd
);
40 * kernctl_syscall_mask - Get syscall mask associated to a channel FD.
42 * The parameter @syscall_mask should initially be either NULL or point
43 * to memory allocated with malloc(3) or realloc(3). When the function
44 * returns, it will point to a memory area of the size required for the
45 * bitmask (using realloc(3) to resize the memory).
47 * It returns 0 if OK, -1 on error. In all cases (error and OK),
48 * @syscall_mask should be freed by the caller with free(3).
50 int kernctl_syscall_mask(int fd
, char **syscall_mask
,
53 /* Process ID tracking can be applied to session FD */
54 int kernctl_track_pid(int fd
, int pid
);
55 int kernctl_untrack_pid(int fd
, int pid
);
56 int kernctl_list_tracker_pids(int fd
);
58 int kernctl_track_id(int fd
, enum lttng_process_attr process_attr
, int id
);
59 int kernctl_untrack_id(int fd
, enum lttng_process_attr process_attr
, int id
);
60 int kernctl_list_tracker_ids(int fd
, enum lttng_process_attr process_attr
);
62 int kernctl_session_regenerate_metadata(int fd
);
63 int kernctl_session_regenerate_statedump(int fd
);
64 int kernctl_session_set_name(int fd
, const char *name
);
65 int kernctl_session_set_creation_time(int fd
, time_t time
);
67 /* Buffer operations */
69 /* For mmap mode, readable without "get" operation */
70 int kernctl_get_mmap_len(int fd
, unsigned long *len
);
71 int kernctl_get_max_subbuf_size(int fd
, unsigned long *len
);
74 * For mmap mode, operate on the current packet (between get/put or
77 int kernctl_get_mmap_read_offset(int fd
, unsigned long *len
);
78 int kernctl_get_subbuf_size(int fd
, unsigned long *len
);
79 int kernctl_get_padded_subbuf_size(int fd
, unsigned long *len
);
81 int kernctl_get_next_subbuf(int fd
);
82 int kernctl_put_next_subbuf(int fd
);
85 int kernctl_snapshot(int fd
);
86 int kernctl_snapshot_sample_positions(int fd
);
87 int kernctl_snapshot_get_consumed(int fd
, unsigned long *pos
);
88 int kernctl_snapshot_get_produced(int fd
, unsigned long *pos
);
89 int kernctl_get_subbuf(int fd
, unsigned long *pos
);
90 int kernctl_put_subbuf(int fd
);
92 int kernctl_buffer_flush(int fd
);
93 int kernctl_buffer_flush_empty(int fd
);
94 int kernctl_buffer_clear(int fd
);
95 int kernctl_get_metadata_version(int fd
, uint64_t *version
);
96 int kernctl_metadata_cache_dump(int fd
);
99 int kernctl_get_timestamp_begin(int fd
, uint64_t *timestamp_begin
);
100 int kernctl_get_timestamp_end(int fd
, uint64_t *timestamp_end
);
101 int kernctl_get_events_discarded(int fd
, uint64_t *events_discarded
);
102 int kernctl_get_content_size(int fd
, uint64_t *content_size
);
103 int kernctl_get_packet_size(int fd
, uint64_t *packet_size
);
104 int kernctl_get_stream_id(int fd
, uint64_t *stream_id
);
105 int kernctl_get_current_timestamp(int fd
, uint64_t *ts
);
106 int kernctl_get_sequence_number(int fd
, uint64_t *seq
);
107 int kernctl_get_instance_id(int fd
, uint64_t *seq
);
109 #endif /* _LTTNG_KERNEL_CTL_H */