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[lttng-tools.git] / libkernelctl / kernel-ioctl.h
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 #ifndef _LTT_KERNEL_IOCTL_H
21 #define _LTT_KERNEL_IOCTL_H
22
23 /* Get a snapshot of the current ring buffer producer and consumer positions */
24 #define RING_BUFFER_SNAPSHOT _IO(0xF6, 0x00)
25 /* Get the consumer position (iteration start) */
26 #define RING_BUFFER_SNAPSHOT_GET_CONSUMED _IOR(0xF6, 0x01, unsigned long)
27 /* Get the producer position (iteration end) */
28 #define RING_BUFFER_SNAPSHOT_GET_PRODUCED _IOR(0xF6, 0x02, unsigned long)
29 /* Get exclusive read access to the specified sub-buffer position */
30 #define RING_BUFFER_GET_SUBBUF _IOW(0xF6, 0x03, unsigned long)
31 /* Release exclusive sub-buffer access */
32 #define RING_BUFFER_PUT_SUBBUF _IO(0xF6, 0x04)
33
34 /* Get exclusive read access to the next sub-buffer that can be read. */
35 #define RING_BUFFER_GET_NEXT_SUBBUF _IO(0xF6, 0x05)
36 /* Release exclusive sub-buffer access, move consumer forward. */
37 #define RING_BUFFER_PUT_NEXT_SUBBUF _IO(0xF6, 0x06)
38 /* returns the size of the current sub-buffer, without padding (for mmap). */
39 #define RING_BUFFER_GET_SUBBUF_SIZE _IOR(0xF6, 0x07, unsigned long)
40 /* returns the size of the current sub-buffer, with padding (for splice). */
41 #define RING_BUFFER_GET_PADDED_SUBBUF_SIZE _IOR(0xF6, 0x08, unsigned long)
42 /* returns the maximum size for sub-buffers. */
43 #define RING_BUFFER_GET_MAX_SUBBUF_SIZE _IOR(0xF6, 0x09, unsigned long)
44 /* returns the length to mmap. */
45 #define RING_BUFFER_GET_MMAP_LEN _IOR(0xF6, 0x0A, unsigned long)
46 /* returns the offset of the subbuffer belonging to the mmap reader. */
47 #define RING_BUFFER_GET_MMAP_READ_OFFSET _IOR(0xF6, 0x0B, unsigned long)
48 /* flush the current sub-buffer */
49 #define RING_BUFFER_FLUSH _IO(0xF6, 0x0C)
50
51 /* LTTng file descriptor ioctl */
52 #define LTTNG_KERNEL_SESSION _IO(0xF6, 0x40)
53 #define LTTNG_KERNEL_TRACER_VERSION \
54 _IOR(0xF6, 0x41, struct lttng_kernel_tracer_version)
55 #define LTTNG_KERNEL_TRACEPOINT_LIST _IO(0xF6, 0x42)
56 #define LTTNG_KERNEL_WAIT_QUIESCENT _IO(0xF6, 0x43)
57
58 /* Session FD ioctl */
59 #define LTTNG_KERNEL_METADATA \
60 _IOW(0xF6, 0x50, struct lttng_channel_attr)
61 #define LTTNG_KERNEL_CHANNEL \
62 _IOW(0xF6, 0x51, struct lttng_channel_attr)
63 #define LTTNG_KERNEL_SESSION_START _IO(0xF6, 0x52)
64 #define LTTNG_KERNEL_SESSION_STOP _IO(0xF6, 0x53)
65
66 /* Channel FD ioctl */
67 #define LTTNG_KERNEL_STREAM _IO(0xF6, 0x60)
68 #define LTTNG_KERNEL_EVENT \
69 _IOW(0xF6, 0x61, struct lttng_kernel_event)
70
71 /* Event and Channel FD ioctl */
72 #define LTTNG_KERNEL_CONTEXT \
73 _IOW(0xF6, 0x70, struct lttng_kernel_context)
74
75 /* Event, Channel and Session ioctl */
76 #define LTTNG_KERNEL_ENABLE _IO(0xF6, 0x80)
77 #define LTTNG_KERNEL_DISABLE _IO(0xF6, 0x81)
78
79 #endif /* _LTT_KERNEL_IOCTL_H */
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