Add kernel metadata support to lttng and API
[lttng-tools.git] / libkernelctl / kernel-ioctl.h
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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; either version 2
8 * of the License, or (at your option) any later version.
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
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49#define LTTNG_KERNEL_SESSION _IO(0xF6, 0x40)
50#define LTTNG_KERNEL_SESSION_START _IO(0xF6, 0x41)
51#define LTTNG_KERNEL_SESSION_STOP _IO(0xF6, 0x42)
52#define LTTNG_KERNEL_CHANNEL \
53 _IOW(0xF6, 0x43, struct lttng_kernel_channel)
54#define LTTNG_KERNEL_STREAM _IO(0xF6, 0x44)
55#define LTTNG_KERNEL_EVENT \
56 _IOW(0xF6, 0x45, struct lttng_kernel_event)
57#define LTTNG_KERNEL_METADATA \
58 _IOW(0xF6, 0x46, struct lttng_kernel_channel)
59#define LTTNG_KERNEL_KPROBE \
60 _IOW(0xF6, 0x47, struct lttng_kernel_kprobe)
61#define LTTNG_KERNEL_TRACER_VERSION \
62 _IOR(0xF6, 0x48, struct lttng_kernel_tracer_version)
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63
64#endif /* _LTT_KERNEL_IOCTL_H */
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