2 * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
4 * SPDX-License-Identifier: GPL-2.0-only
8 #ifndef _LTT_KERNEL_CTL_H
9 #define _LTT_KERNEL_CTL_H
13 #include "trace-kernel.h"
16 * Default size for the event list when kernel_list_events is called. This size
17 * value is based on the initial LTTng 2.0 version set of tracepoints.
19 * This is NOT an upper bound because if the real event list size is bigger,
20 * dynamic reallocation is performed.
22 #define KERNEL_EVENT_INIT_LIST_SIZE 64
23 #define KERNEL_TRACKER_IDS_INIT_LIST_SIZE 64
25 int kernel_add_channel_context(struct ltt_kernel_channel
*chan
,
26 struct ltt_kernel_context
*ctx
);
27 int kernel_create_session(struct ltt_session
*session
);
28 int kernel_create_channel(struct ltt_kernel_session
*session
,
29 struct lttng_channel
*chan
);
30 int kernel_create_event(struct lttng_event
*ev
, struct ltt_kernel_channel
*channel
,
31 char *filter_expression
, struct lttng_filter_bytecode
*filter
);
32 int kernel_disable_channel(struct ltt_kernel_channel
*chan
);
33 int kernel_disable_event(struct ltt_kernel_event
*event
);
34 int kernel_enable_event(struct ltt_kernel_event
*event
);
35 int kernel_enable_channel(struct ltt_kernel_channel
*chan
);
36 int kernel_track_id(enum lttng_tracker_type tracker_type
,
37 struct ltt_kernel_session
*session
,
38 const struct lttng_tracker_id
*id
);
39 int kernel_untrack_id(enum lttng_tracker_type tracker_type
,
40 struct ltt_kernel_session
*session
,
41 const struct lttng_tracker_id
*id
);
42 int kernel_open_metadata(struct ltt_kernel_session
*session
);
43 int kernel_open_metadata_stream(struct ltt_kernel_session
*session
);
44 int kernel_open_channel_stream(struct ltt_kernel_channel
*channel
);
45 int kernel_flush_buffer(struct ltt_kernel_channel
*channel
);
46 int kernel_metadata_flush_buffer(int fd
);
47 int kernel_start_session(struct ltt_kernel_session
*session
);
48 int kernel_stop_session(struct ltt_kernel_session
*session
);
49 ssize_t
kernel_list_events(struct lttng_event
**event_list
);
50 void kernel_wait_quiescent(void);
51 int kernel_validate_version(struct lttng_kernel_tracer_version
*kernel_tracer_version
,
52 struct lttng_kernel_tracer_abi_version
*kernel_tracer_abi_version
);
53 void kernel_destroy_session(struct ltt_kernel_session
*ksess
);
54 void kernel_free_session(struct ltt_kernel_session
*ksess
);
55 void kernel_destroy_channel(struct ltt_kernel_channel
*kchan
);
56 enum lttng_error_code
kernel_snapshot_record(
57 struct ltt_kernel_session
*ksess
,
58 const struct consumer_output
*output
, int wait
,
59 uint64_t nb_packets_per_stream
);
60 int kernel_syscall_mask(int chan_fd
, char **syscall_mask
, uint32_t *nr_bits
);
61 enum lttng_error_code
kernel_rotate_session(struct ltt_session
*session
);
62 enum lttng_error_code
kernel_clear_session(struct ltt_session
*session
);
64 int init_kernel_workarounds(void);
65 int kernel_list_tracker_ids(enum lttng_tracker_type tracker_type
,
66 struct ltt_kernel_session
*session
,
67 struct lttng_tracker_ids
**ids
);
68 int kernel_supports_ring_buffer_snapshot_sample_positions(void);
69 int kernel_supports_ring_buffer_packet_sequence_number(void);
70 int init_kernel_tracer(void);
71 void cleanup_kernel_tracer(void);
72 bool kernel_tracer_is_initialized(void);
74 enum lttng_error_code
kernel_create_channel_subdirectories(
75 const struct ltt_kernel_session
*ksess
);
77 #endif /* _LTT_KERNEL_CTL_H */