src/common/kernel-ctl/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 modify
   6  * it under the terms of the GNU General Public License, version 2 only,
   7  * as published by the Free Software Foundation.
   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  *
  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.
  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 */
  23 #define RING_BUFFER_SNAPSHOT                _IO(0xF6, 0x00)
  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 */
  29 #define RING_BUFFER_GET_SUBBUF              _IOW(0xF6, 0x03, unsigned long)
  30 /* Release exclusive sub-buffer access */
  31 #define RING_BUFFER_PUT_SUBBUF              _IO(0xF6, 0x04)
  32
  33 /* Get exclusive read access to the next sub-buffer that can be read. */
  34 #define RING_BUFFER_GET_NEXT_SUBBUF         _IO(0xF6, 0x05)
  35 /* Release exclusive sub-buffer access, move consumer forward. */
  36 #define RING_BUFFER_PUT_NEXT_SUBBUF         _IO(0xF6, 0x06)
  37 /* returns the size of the current sub-buffer, without padding (for mmap). */
  38 #define RING_BUFFER_GET_SUBBUF_SIZE         _IOR(0xF6, 0x07, unsigned long)
  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. */
  44 #define RING_BUFFER_GET_MMAP_LEN            _IOR(0xF6, 0x0A, unsigned long)
  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)
  47 /* flush the current sub-buffer */
  48 #define RING_BUFFER_FLUSH                   _IO(0xF6, 0x0C)
  49 /* map stream to stream id for network streaming */
  50 #define RING_BUFFER_SET_STREAM_ID           _IOW(0xF6, 0x0D, unsigned long)
  51
  52
  53 /* LTTng file descriptor ioctl */
  54 #define LTTNG_KERNEL_SESSION                _IO(0xF6, 0x40)
  55 #define LTTNG_KERNEL_TRACER_VERSION         \
  56                 _IOR(0xF6, 0x41, struct lttng_kernel_tracer_version)
  57 #define LTTNG_KERNEL_TRACEPOINT_LIST        _IO(0xF6, 0x42)
  58 #define LTTNG_KERNEL_WAIT_QUIESCENT         _IO(0xF6, 0x43)
  59 #define LTTNG_KERNEL_CALIBRATE                  \
  60         _IOWR(0xF6, 0x44, struct lttng_kernel_calibrate)
  61
  62 /* Session FD ioctl */
  63 #define LTTNG_KERNEL_METADATA               \
  64                 _IOW(0xF6, 0x50, struct lttng_channel_attr)
  65 #define LTTNG_KERNEL_CHANNEL                \
  66                 _IOW(0xF6, 0x51, struct lttng_channel_attr)
  67 #define LTTNG_KERNEL_SESSION_START          _IO(0xF6, 0x52)
  68 #define LTTNG_KERNEL_SESSION_STOP           _IO(0xF6, 0x53)
  69
  70 /* Channel FD ioctl */
  71 #define LTTNG_KERNEL_STREAM                 _IO(0xF6, 0x60)
  72 #define LTTNG_KERNEL_EVENT                  \
  73                 _IOW(0xF6, 0x61, struct lttng_kernel_event)
  74 #define LTTNG_KERNEL_STREAM_ID_OFFSET       \
  75                 _IOR(0xF6, 0x62, unsigned long)
  76
  77 /* Event and Channel FD ioctl */
  78 #define LTTNG_KERNEL_CONTEXT                \
  79                 _IOW(0xF6, 0x70, struct lttng_kernel_context)
  80
  81 /* Event, Channel and Session ioctl */
  82 #define LTTNG_KERNEL_ENABLE                 _IO(0xF6, 0x80)
  83 #define LTTNG_KERNEL_DISABLE                _IO(0xF6, 0x81)
  84
  85 #endif /* _LTT_KERNEL_IOCTL_H */