78b2563473fd370be92dc116dc57875af59c45e3
[lttng-tools.git] / libkernelctl / libkernelctl.c
1 /*
2 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; only version 2
8 * of the License.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 */
19
20 #include <sys/ioctl.h>
21
22 #include "kernel-ioctl.h"
23 #include "libkernelctl.h"
24
25 int kernctl_add_context(int fd, struct lttng_kernel_context *ctx)
26 {
27 return ioctl(fd, LTTNG_KERNEL_CONTEXT, ctx);
28 }
29
30 int kernctl_buffer_flush(int fd)
31 {
32 return ioctl(fd, RING_BUFFER_FLUSH);
33 }
34
35 int kernctl_create_channel(int fd, struct lttng_channel_attr *chops)
36 {
37 return ioctl(fd, LTTNG_KERNEL_CHANNEL, chops);
38 }
39
40 int kernctl_create_event(int fd, struct lttng_kernel_event *ev)
41 {
42 return ioctl(fd, LTTNG_KERNEL_EVENT, ev);
43 }
44
45 int kernctl_create_session(int fd)
46 {
47 return ioctl(fd, LTTNG_KERNEL_SESSION);
48 }
49
50 int kernctl_create_stream(int fd)
51 {
52 return ioctl(fd, LTTNG_KERNEL_STREAM);
53 }
54
55 /* Enable event, channel and session ioctl */
56 int kernctl_enable(int fd)
57 {
58 return ioctl(fd, LTTNG_KERNEL_ENABLE);
59 }
60
61 /* Disable event, channel and session ioctl */
62 int kernctl_disable(int fd)
63 {
64 return ioctl(fd, LTTNG_KERNEL_DISABLE);
65 }
66
67 /* returns the maximum size for sub-buffers. */
68 int kernctl_get_max_subbuf_size(int fd, unsigned long *len)
69 {
70 return ioctl(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len);
71 }
72
73 /* returns the length to mmap. */
74 int kernctl_get_mmap_len(int fd, unsigned long *len)
75 {
76 return ioctl(fd, RING_BUFFER_GET_MMAP_LEN, len);
77 }
78
79 /* returns the offset of the subbuffer belonging to the mmap reader. */
80 int kernctl_get_mmap_read_offset(int fd, unsigned long *off)
81 {
82 return ioctl(fd, RING_BUFFER_GET_MMAP_READ_OFFSET, off);
83 }
84
85 /* Get exclusive read access to the next sub-buffer that can be read. */
86 int kernctl_get_next_subbuf(int fd)
87 {
88 return ioctl(fd, RING_BUFFER_GET_NEXT_SUBBUF);
89 }
90
91 /* returns the size of the current sub-buffer, without padding (for mmap). */
92 int kernctl_get_padded_subbuf_size(int fd, unsigned long *len)
93 {
94 return ioctl(fd, RING_BUFFER_GET_PADDED_SUBBUF_SIZE, len);
95 }
96
97 /* Get exclusive read access to the specified sub-buffer position */
98 int kernctl_get_subbuf(int fd, unsigned long *len)
99 {
100 return ioctl(fd, RING_BUFFER_GET_SUBBUF, len);
101 }
102
103 /* returns the size of the current sub-buffer, without padding (for mmap). */
104 int kernctl_get_subbuf_size(int fd, unsigned long *len)
105 {
106 return ioctl(fd, RING_BUFFER_GET_SUBBUF_SIZE, len);
107 }
108
109 /* open the metadata global channel */
110 int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops)
111 {
112 return ioctl(fd, LTTNG_KERNEL_METADATA, chops);
113 }
114
115 /* Release exclusive sub-buffer access, move consumer forward. */
116 int kernctl_put_next_subbuf(int fd)
117 {
118 return ioctl(fd, RING_BUFFER_PUT_NEXT_SUBBUF);
119 }
120
121 /* Release exclusive sub-buffer access */
122 int kernctl_put_subbuf(int fd)
123 {
124 return ioctl(fd, RING_BUFFER_PUT_SUBBUF);
125 }
126
127 /* Get a snapshot of the current ring buffer producer and consumer positions */
128 int kernctl_snapshot(int fd)
129 {
130 return ioctl(fd, RING_BUFFER_SNAPSHOT);
131 }
132
133 /* Get the consumer position (iteration start) */
134 int kernctl_snapshot_get_consumed(int fd, unsigned long *pos)
135 {
136 return ioctl(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos);
137 }
138
139 /* Get the producer position (iteration end) */
140 int kernctl_snapshot_get_produced(int fd, unsigned long *pos)
141 {
142 return ioctl(fd, RING_BUFFER_SNAPSHOT_GET_PRODUCED, pos);
143 }
144
145 int kernctl_start_session(int fd)
146 {
147 return ioctl(fd, LTTNG_KERNEL_SESSION_START);
148 }
149
150 int kernctl_stop_session(int fd)
151 {
152 return ioctl(fd, LTTNG_KERNEL_SESSION_STOP);
153 }
154
155 int kernctl_tracepoint_list(int fd)
156 {
157 return ioctl(fd, LTTNG_KERNEL_TRACEPOINT_LIST);
158 }
159
160 int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v)
161 {
162 return ioctl(fd, LTTNG_KERNEL_TRACER_VERSION, v);
163 }
164
165 int kernctl_wait_quiescent(int fd)
166 {
167 return ioctl(fd, LTTNG_KERNEL_WAIT_QUIESCENT);
168 }
169
170 int kernctl_calibrate(int fd, struct lttng_kernel_calibrate *calibrate)
171 {
172 return ioctl(fd, LTTNG_KERNEL_CALIBRATE, calibrate);
173 }
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