src/common/lttng-kernel-old.h

   1 /*
   2  * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
   3  * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   4  * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
   5  *
   6  * SPDX-License-Identifier: GPL-2.0-only
   7  *
   8  */
   9
  10 #ifndef _LTTNG_KERNEL_OLD_H
  11 #define _LTTNG_KERNEL_OLD_H
  12
  13 #include <stdint.h>
  14 #include <common/lttng-kernel.h>
  15
  16 /*
  17  * LTTng DebugFS ABI structures.
  18  *
  19  * This is the kernel ABI copied from lttng-modules tree.
  20  */
  21
  22 /* Perf counter attributes */
  23 struct lttng_kernel_old_perf_counter_ctx {
  24         uint32_t type;
  25         uint64_t config;
  26         char name[LTTNG_KERNEL_SYM_NAME_LEN];
  27 };
  28
  29 /* Event/Channel context */
  30 #define LTTNG_KERNEL_OLD_CONTEXT_PADDING1  16
  31 #define LTTNG_KERNEL_OLD_CONTEXT_PADDING2  LTTNG_KERNEL_SYM_NAME_LEN + 32
  32 struct lttng_kernel_old_context {
  33         enum lttng_kernel_context_type ctx;
  34         char padding[LTTNG_KERNEL_OLD_CONTEXT_PADDING1];
  35
  36         union {
  37                 struct lttng_kernel_old_perf_counter_ctx perf_counter;
  38                 char padding[LTTNG_KERNEL_OLD_CONTEXT_PADDING2];
  39         } u;
  40 };
  41
  42 struct lttng_kernel_old_kretprobe {
  43         uint64_t addr;
  44
  45         uint64_t offset;
  46         char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
  47 };
  48
  49 /*
  50  * Either addr is used, or symbol_name and offset.
  51  */
  52 struct lttng_kernel_old_kprobe {
  53         uint64_t addr;
  54
  55         uint64_t offset;
  56         char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
  57 };
  58
  59 /* Function tracer */
  60 struct lttng_kernel_old_function {
  61         char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
  62 };
  63
  64 #define LTTNG_KERNEL_OLD_EVENT_PADDING1    16
  65 #define LTTNG_KERNEL_OLD_EVENT_PADDING2    LTTNG_KERNEL_SYM_NAME_LEN + 32
  66 struct lttng_kernel_old_event {
  67         char name[LTTNG_KERNEL_SYM_NAME_LEN];
  68         enum lttng_kernel_instrumentation instrumentation;
  69         char padding[LTTNG_KERNEL_OLD_EVENT_PADDING1];
  70
  71         /* Per instrumentation type configuration */
  72         union {
  73                 struct lttng_kernel_old_kretprobe kretprobe;
  74                 struct lttng_kernel_old_kprobe kprobe;
  75                 struct lttng_kernel_old_function ftrace;
  76                 char padding[LTTNG_KERNEL_OLD_EVENT_PADDING2];
  77         } u;
  78 };
  79
  80 struct lttng_kernel_old_tracer_version {
  81         uint32_t major;
  82         uint32_t minor;
  83         uint32_t patchlevel;
  84 };
  85
  86 /*
  87  * kernel channel
  88  */
  89 #define LTTNG_KERNEL_OLD_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
  90 struct lttng_kernel_old_channel {
  91         int overwrite;                      /* 1: overwrite, 0: discard */
  92         uint64_t subbuf_size;               /* bytes */
  93         uint64_t num_subbuf;                /* power of 2 */
  94         unsigned int switch_timer_interval; /* usec */
  95         unsigned int read_timer_interval;   /* usec */
  96         enum lttng_event_output output;     /* splice, mmap */
  97
  98         char padding[LTTNG_KERNEL_OLD_CHANNEL_PADDING1];
  99 };
 100
 101 #endif /* _LTTNG_KERNEL_OLD_H */