2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2 only,
6 * as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 #ifndef _LTT_KERNEL_CTL_H
19 #define _LTT_KERNEL_CTL_H
23 #include "trace-kernel.h"
26 * Default size for the event list when kernel_list_events is called. This size
27 * value is based on the initial LTTng 2.0 version set of tracepoints.
29 * This is NOT an upper bound because if the real event list size is bigger,
30 * dynamic reallocation is performed.
32 #define KERNEL_EVENT_INIT_LIST_SIZE 64
33 #define KERNEL_TRACKER_PIDS_INIT_LIST_SIZE 64
35 int kernel_add_channel_context(struct ltt_kernel_channel
*chan
,
36 struct ltt_kernel_context
*ctx
);
37 int kernel_create_session(struct ltt_session
*session
);
38 int kernel_create_channel(struct ltt_kernel_session
*session
,
39 struct lttng_channel
*chan
);
40 int kernel_create_event(struct lttng_event
*ev
, struct ltt_kernel_channel
*channel
,
41 char *filter_expression
, struct lttng_filter_bytecode
*filter
);
42 int kernel_disable_channel(struct ltt_kernel_channel
*chan
);
43 int kernel_disable_event(struct ltt_kernel_event
*event
);
44 int kernel_enable_event(struct ltt_kernel_event
*event
);
45 int kernel_enable_channel(struct ltt_kernel_channel
*chan
);
46 int kernel_track_pid(struct ltt_kernel_session
*session
, int pid
);
47 int kernel_untrack_pid(struct ltt_kernel_session
*session
, int pid
);
48 int kernel_open_metadata(struct ltt_kernel_session
*session
);
49 int kernel_open_metadata_stream(struct ltt_kernel_session
*session
);
50 int kernel_open_channel_stream(struct ltt_kernel_channel
*channel
);
51 int kernel_flush_buffer(struct ltt_kernel_channel
*channel
);
52 int kernel_metadata_flush_buffer(int fd
);
53 int kernel_start_session(struct ltt_kernel_session
*session
);
54 int kernel_stop_session(struct ltt_kernel_session
*session
);
55 ssize_t
kernel_list_events(struct lttng_event
**event_list
);
56 void kernel_wait_quiescent(void);
57 int kernel_validate_version(struct lttng_kernel_tracer_version
*kernel_tracer_version
,
58 struct lttng_kernel_tracer_abi_version
*kernel_tracer_abi_version
);
59 void kernel_destroy_session(struct ltt_kernel_session
*ksess
);
60 void kernel_free_session(struct ltt_kernel_session
*ksess
);
61 void kernel_destroy_channel(struct ltt_kernel_channel
*kchan
);
62 enum lttng_error_code
kernel_snapshot_record(
63 struct ltt_kernel_session
*ksess
,
64 const struct consumer_output
*output
, int wait
,
65 uint64_t nb_packets_per_stream
);
66 int kernel_syscall_mask(int chan_fd
, char **syscall_mask
, uint32_t *nr_bits
);
67 enum lttng_error_code
kernel_rotate_session(struct ltt_session
*session
);
69 int init_kernel_workarounds(void);
70 ssize_t
kernel_list_tracker_pids(struct ltt_kernel_session
*session
,
72 int kernel_supports_ring_buffer_snapshot_sample_positions(void);
73 int init_kernel_tracer(void);
74 void cleanup_kernel_tracer(void);
75 bool kernel_tracer_is_initialized(void);
77 enum lttng_error_code
kernel_create_channel_subdirectories(
78 const struct ltt_kernel_session
*ksess
);
80 #endif /* _LTT_KERNEL_CTL_H */