src/common/lttng-kernel-old.h

   1 /*
   2  * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
   3  *                      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   4  *                      David Goulet <david.goulet@polymtl.ca>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License, version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #ifndef _LTTNG_KERNEL_OLD_H
  21 #define _LTTNG_KERNEL_OLD_H
  22
  23 #include <stdint.h>
  24 #include <common/lttng-kernel.h>
  25
  26 /*
  27  * LTTng DebugFS ABI structures.
  28  *
  29  * This is the kernel ABI copied from lttng-modules tree.
  30  */
  31
  32 /* Perf counter attributes */
  33 struct lttng_kernel_old_perf_counter_ctx {
  34         uint32_t type;
  35         uint64_t config;
  36         char name[LTTNG_KERNEL_SYM_NAME_LEN];
  37 };
  38
  39 /* Event/Channel context */
  40 #define LTTNG_KERNEL_OLD_CONTEXT_PADDING1  16
  41 #define LTTNG_KERNEL_OLD_CONTEXT_PADDING2  LTTNG_KERNEL_SYM_NAME_LEN + 32
  42 struct lttng_kernel_old_context {
  43         enum lttng_kernel_context_type ctx;
  44         char padding[LTTNG_KERNEL_OLD_CONTEXT_PADDING1];
  45
  46         union {
  47                 struct lttng_kernel_old_perf_counter_ctx perf_counter;
  48                 char padding[LTTNG_KERNEL_OLD_CONTEXT_PADDING2];
  49         } u;
  50 };
  51
  52 struct lttng_kernel_old_kretprobe {
  53         uint64_t addr;
  54
  55         uint64_t offset;
  56         char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
  57 };
  58
  59 /*
  60  * Either addr is used, or symbol_name and offset.
  61  */
  62 struct lttng_kernel_old_kprobe {
  63         uint64_t addr;
  64
  65         uint64_t offset;
  66         char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
  67 };
  68
  69 /* Function tracer */
  70 struct lttng_kernel_old_function {
  71         char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
  72 };
  73
  74 #define LTTNG_KERNEL_OLD_EVENT_PADDING1    16
  75 #define LTTNG_KERNEL_OLD_EVENT_PADDING2    LTTNG_KERNEL_SYM_NAME_LEN + 32
  76 struct lttng_kernel_old_event {
  77         char name[LTTNG_KERNEL_SYM_NAME_LEN];
  78         enum lttng_kernel_instrumentation instrumentation;
  79         char padding[LTTNG_KERNEL_OLD_EVENT_PADDING1];
  80
  81         /* Per instrumentation type configuration */
  82         union {
  83                 struct lttng_kernel_old_kretprobe kretprobe;
  84                 struct lttng_kernel_old_kprobe kprobe;
  85                 struct lttng_kernel_old_function ftrace;
  86                 char padding[LTTNG_KERNEL_OLD_EVENT_PADDING2];
  87         } u;
  88 };
  89
  90 struct lttng_kernel_old_tracer_version {
  91         uint32_t major;
  92         uint32_t minor;
  93         uint32_t patchlevel;
  94 };
  95
  96 /*
  97  * kernel channel
  98  */
  99 #define LTTNG_KERNEL_OLD_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
 100 struct lttng_kernel_old_channel {
 101         int overwrite;                      /* 1: overwrite, 0: discard */
 102         uint64_t subbuf_size;               /* bytes */
 103         uint64_t num_subbuf;                /* power of 2 */
 104         unsigned int switch_timer_interval; /* usec */
 105         unsigned int read_timer_interval;   /* usec */
 106         enum lttng_event_output output;     /* splice, mmap */
 107
 108         char padding[LTTNG_KERNEL_OLD_CHANNEL_PADDING1];
 109 };
 110
 111 #endif /* _LTTNG_KERNEL_OLD_H */