2 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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.
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.
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.
19 #ifndef _LTTNG_KERNEL_CTL_H
20 #define _LTTNG_KERNEL_CTL_H
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 */
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
);
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
);
39 /* Apply on event FD */
40 int kernctl_filter(int fd
, struct lttng_filter_bytecode
*filter
);
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
);
49 * kernctl_syscall_mask - Get syscall mask associated to a channel FD.
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).
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).
59 int kernctl_syscall_mask(int fd
, char **syscall_mask
,
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
);
67 int kernctl_session_regenerate_metadata(int fd
);
68 int kernctl_session_regenerate_statedump(int fd
);
70 /* Buffer operations */
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
);
77 * For mmap mode, operate on the current packet (between get/put or
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
);
84 int kernctl_get_next_subbuf(int fd
);
85 int kernctl_put_next_subbuf(int fd
);
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
);
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
);
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
);
111 #endif /* _LTTNG_KERNEL_CTL_H */