src/common/lttng-kernel-old.hpp

   1 /*
   2  * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   3  * Copyright (C) 2011 EfficiOS Inc.
   4  *
   5  * SPDX-License-Identifier: GPL-2.0-only
   6  *
   7  */
   8
   9 #ifndef _LTTNG_KERNEL_OLD_H
  10 #define _LTTNG_KERNEL_OLD_H
  11
  12 #include <stdint.h>
  13 #include <common/lttng-kernel.hpp>
  14
  15 /*
  16  * LTTng DebugFS ABI structures.
  17  *
  18  * This is the kernel ABI copied from lttng-modules tree.
  19  */
  20
  21 /* Perf counter attributes */
  22 struct lttng_kernel_abi_old_perf_counter_ctx {
  23         uint32_t type;
  24         uint64_t config;
  25         char name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
  26 };
  27
  28 /* Event/Channel context */
  29 #define LTTNG_KERNEL_ABI_OLD_CONTEXT_PADDING1  16
  30 #define LTTNG_KERNEL_ABI_OLD_CONTEXT_PADDING2  LTTNG_KERNEL_ABI_SYM_NAME_LEN + 32
  31 struct lttng_kernel_abi_old_context {
  32         enum lttng_kernel_abi_context_type ctx;
  33         char padding[LTTNG_KERNEL_ABI_OLD_CONTEXT_PADDING1];
  34
  35         union {
  36                 struct lttng_kernel_abi_old_perf_counter_ctx perf_counter;
  37                 char padding[LTTNG_KERNEL_ABI_OLD_CONTEXT_PADDING2];
  38         } u;
  39 };
  40
  41 struct lttng_kernel_abi_old_kretprobe {
  42         uint64_t addr;
  43
  44         uint64_t offset;
  45         char symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
  46 };
  47
  48 /*
  49  * Either addr is used, or symbol_name and offset.
  50  */
  51 struct lttng_kernel_abi_old_kprobe {
  52         uint64_t addr;
  53
  54         uint64_t offset;
  55         char symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
  56 };
  57
  58 /* Function tracer */
  59 struct lttng_kernel_abi_old_function {
  60         char symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
  61 };
  62
  63 #define LTTNG_KERNEL_ABI_OLD_EVENT_PADDING1    16
  64 #define LTTNG_KERNEL_ABI_OLD_EVENT_PADDING2    LTTNG_KERNEL_ABI_SYM_NAME_LEN + 32
  65 struct lttng_kernel_abi_old_event {
  66         char name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
  67         enum lttng_kernel_abi_instrumentation instrumentation;
  68         char padding[LTTNG_KERNEL_ABI_OLD_EVENT_PADDING1];
  69
  70         /* Per instrumentation type configuration */
  71         union {
  72                 struct lttng_kernel_abi_old_kretprobe kretprobe;
  73                 struct lttng_kernel_abi_old_kprobe kprobe;
  74                 struct lttng_kernel_abi_old_function ftrace;
  75                 char padding[LTTNG_KERNEL_ABI_OLD_EVENT_PADDING2];
  76         } u;
  77 };
  78
  79 struct lttng_kernel_abi_old_tracer_version {
  80         uint32_t major;
  81         uint32_t minor;
  82         uint32_t patchlevel;
  83 };
  84
  85 /*
  86  * kernel channel
  87  */
  88 #define LTTNG_KERNEL_ABI_OLD_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
  89 struct lttng_kernel_abi_old_channel {
  90         int overwrite;                      /* 1: overwrite, 0: discard */
  91         uint64_t subbuf_size;               /* bytes */
  92         uint64_t num_subbuf;                /* power of 2 */
  93         unsigned int switch_timer_interval; /* usec */
  94         unsigned int read_timer_interval;   /* usec */
  95         enum lttng_event_output output;     /* splice, mmap */
  96
  97         char padding[LTTNG_KERNEL_ABI_OLD_CHANNEL_PADDING1];
  98 };
  99
 100 #endif /* _LTTNG_KERNEL_OLD_H */