Fix: Stream allocation and insertion consistency
[lttng-tools.git] / src / common / kernel-ctl / 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 *
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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.
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8 *
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.
13 *
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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.
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17 */
18
19#ifndef _LTT_KERNEL_IOCTL_H
20#define _LTT_KERNEL_IOCTL_H
21
22/* Get a snapshot of the current ring buffer producer and consumer positions */
f3ed775e 23#define RING_BUFFER_SNAPSHOT _IO(0xF6, 0x00)
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24/* Get the consumer position (iteration start) */
25#define RING_BUFFER_SNAPSHOT_GET_CONSUMED _IOR(0xF6, 0x01, unsigned long)
26/* Get the producer position (iteration end) */
27#define RING_BUFFER_SNAPSHOT_GET_PRODUCED _IOR(0xF6, 0x02, unsigned long)
28/* Get exclusive read access to the specified sub-buffer position */
f3ed775e 29#define RING_BUFFER_GET_SUBBUF _IOW(0xF6, 0x03, unsigned long)
16421f6e 30/* Release exclusive sub-buffer access */
f3ed775e 31#define RING_BUFFER_PUT_SUBBUF _IO(0xF6, 0x04)
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32
33/* Get exclusive read access to the next sub-buffer that can be read. */
f3ed775e 34#define RING_BUFFER_GET_NEXT_SUBBUF _IO(0xF6, 0x05)
16421f6e 35/* Release exclusive sub-buffer access, move consumer forward. */
f3ed775e 36#define RING_BUFFER_PUT_NEXT_SUBBUF _IO(0xF6, 0x06)
16421f6e 37/* returns the size of the current sub-buffer, without padding (for mmap). */
f3ed775e 38#define RING_BUFFER_GET_SUBBUF_SIZE _IOR(0xF6, 0x07, unsigned long)
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39/* returns the size of the current sub-buffer, with padding (for splice). */
40#define RING_BUFFER_GET_PADDED_SUBBUF_SIZE _IOR(0xF6, 0x08, unsigned long)
41/* returns the maximum size for sub-buffers. */
42#define RING_BUFFER_GET_MAX_SUBBUF_SIZE _IOR(0xF6, 0x09, unsigned long)
43/* returns the length to mmap. */
f3ed775e 44#define RING_BUFFER_GET_MMAP_LEN _IOR(0xF6, 0x0A, unsigned long)
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45/* returns the offset of the subbuffer belonging to the mmap reader. */
46#define RING_BUFFER_GET_MMAP_READ_OFFSET _IOR(0xF6, 0x0B, unsigned long)
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47/* flush the current sub-buffer */
48#define RING_BUFFER_FLUSH _IO(0xF6, 0x0C)
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49/* map stream to stream id for network streaming */
50#define RING_BUFFER_SET_STREAM_ID _IOW(0xF6, 0x0D, unsigned long)
51
f3ed775e 52
857aa172 53/* LTTng file descriptor ioctl */
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54#define LTTNG_KERNEL_SESSION _IO(0xF6, 0x40)
55#define LTTNG_KERNEL_TRACER_VERSION \
56 _IOR(0xF6, 0x41, struct lttng_kernel_tracer_version)
8d609afd 57#define LTTNG_KERNEL_TRACEPOINT_LIST _IO(0xF6, 0x42)
f3ed775e 58#define LTTNG_KERNEL_WAIT_QUIESCENT _IO(0xF6, 0x43)
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59#define LTTNG_KERNEL_CALIBRATE \
60 _IOWR(0xF6, 0x44, struct lttng_kernel_calibrate)
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61
62/* Session FD ioctl */
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63#define LTTNG_KERNEL_METADATA \
64 _IOW(0xF6, 0x50, struct lttng_channel_attr)
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65#define LTTNG_KERNEL_CHANNEL \
66 _IOW(0xF6, 0x51, struct lttng_channel_attr)
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67#define LTTNG_KERNEL_SESSION_START _IO(0xF6, 0x52)
68#define LTTNG_KERNEL_SESSION_STOP _IO(0xF6, 0x53)
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69
70/* Channel FD ioctl */
f3ed775e 71#define LTTNG_KERNEL_STREAM _IO(0xF6, 0x60)
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72#define LTTNG_KERNEL_EVENT \
73 _IOW(0xF6, 0x61, struct lttng_kernel_event)
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74#define LTTNG_KERNEL_STREAM_ID_OFFSET \
75 _IOR(0xF6, 0x62, unsigned long)
f3ed775e 76
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77/* Event and Channel FD ioctl */
78#define LTTNG_KERNEL_CONTEXT \
79 _IOW(0xF6, 0x70, struct lttng_kernel_context)
80
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81/* Event, Channel and Session ioctl */
82#define LTTNG_KERNEL_ENABLE _IO(0xF6, 0x80)
83#define LTTNG_KERNEL_DISABLE _IO(0xF6, 0x81)
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84
85#endif /* _LTT_KERNEL_IOCTL_H */
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