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 */