ltt-debugfs-abi.h

   1 #ifndef _LTT_DEBUGFS_ABI_H
   2 #define _LTT_DEBUGFS_ABI_H
   3
   4 /*
   5  * ltt-debugfs-abi.h
   6  *
   7  * Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  *
   9  * LTTng debugfs ABI header
  10  *
  11  * Dual LGPL v2.1/GPL v2 license.
  12  */
  13
  14 #include <linux/fs.h>
  15
  16 #define LTTNG_SYM_NAME_LEN      128
  17
  18 enum lttng_kernel_instrumentation {
  19         LTTNG_KERNEL_TRACEPOINT = 0,
  20         LTTNG_KERNEL_KPROBE     = 1,
  21         LTTNG_KERNEL_FUNCTION   = 2,
  22 };
  23
  24 /*
  25  * LTTng consumer mode
  26  */
  27 enum lttng_kernel_output {
  28         LTTNG_KERNEL_SPLICE     = 0,
  29         LTTNG_KERNEL_MMAP       = 1,
  30 };
  31
  32 /*
  33  * LTTng DebugFS ABI structures.
  34  */
  35
  36 struct lttng_kernel_channel {
  37         int overwrite;                          /* 1: overwrite, 0: discard */
  38         uint64_t subbuf_size;                   /* in bytes */
  39         uint64_t num_subbuf;
  40         unsigned int switch_timer_interval;     /* usecs */
  41         unsigned int read_timer_interval;       /* usecs */
  42         enum lttng_kernel_output output;        /* splice, mmap */
  43 };
  44
  45 /*
  46  * Either addr is used, or symbol_name and offset.
  47  */
  48 struct lttng_kernel_kprobe {
  49         uint64_t addr;
  50
  51         uint64_t offset;
  52         char symbol_name[LTTNG_SYM_NAME_LEN];
  53 };
  54
  55 struct lttng_kernel_function_tracer {
  56         char symbol_name[LTTNG_SYM_NAME_LEN];
  57 };
  58
  59 struct lttng_kernel_event {
  60         char name[LTTNG_SYM_NAME_LEN];  /* event name */
  61         enum lttng_kernel_instrumentation instrumentation;
  62         /* Per instrumentation type configuration */
  63         union {
  64                 struct lttng_kernel_kprobe kprobe;
  65                 struct lttng_kernel_function_tracer ftrace;
  66         } u;
  67 };
  68
  69 struct lttng_kernel_tracer_version {
  70         uint32_t version;
  71         uint32_t patchlevel;
  72         uint32_t sublevel;
  73 };
  74
  75 enum lttng_kernel_context_type {
  76         LTTNG_KERNEL_CONTEXT_PID                = 0,
  77         LTTNG_KERNEL_CONTEXT_PERF_COUNTER       = 1,
  78         LTTNG_KERNEL_CONTEXT_COMM               = 2,
  79         LTTNG_KERNEL_CONTEXT_PRIO               = 3,
  80         LTTNG_KERNEL_CONTEXT_NICE               = 4,
  81         LTTNG_KERNEL_CONTEXT_VPID               = 5,
  82         LTTNG_KERNEL_CONTEXT_TID                = 6,
  83         LTTNG_KERNEL_CONTEXT_VTID               = 7,
  84         LTTNG_KERNEL_CONTEXT_PPID               = 8,
  85         LTTNG_KERNEL_CONTEXT_VPPID              = 9,
  86 };
  87
  88 struct lttng_kernel_perf_counter_ctx {
  89         uint32_t type;
  90         uint64_t config;
  91         char name[LTTNG_SYM_NAME_LEN];
  92 };
  93
  94 struct lttng_kernel_context {
  95         enum lttng_kernel_context_type ctx;
  96         union {
  97                 struct lttng_kernel_perf_counter_ctx perf_counter;
  98         } u;
  99 };
 100
 101 /* LTTng file descriptor ioctl */
 102 #define LTTNG_KERNEL_SESSION                    _IO(0xF6, 0x40)
 103 #define LTTNG_KERNEL_TRACER_VERSION             \
 104         _IOR(0xF6, 0x41, struct lttng_kernel_tracer_version)
 105 #define LTTNG_KERNEL_TRACEPOINT_LIST            _IO(0xF6, 0x42)
 106 #define LTTNG_KERNEL_WAIT_QUIESCENT             _IO(0xF6, 0x43)
 107
 108 /* Session FD ioctl */
 109 #define LTTNG_KERNEL_METADATA                   \
 110         _IOW(0xF6, 0x50, struct lttng_kernel_channel)
 111 #define LTTNG_KERNEL_CHANNEL                    \
 112         _IOW(0xF6, 0x51, struct lttng_kernel_channel)
 113 #define LTTNG_KERNEL_SESSION_START              _IO(0xF6, 0x52)
 114 #define LTTNG_KERNEL_SESSION_STOP               _IO(0xF6, 0x53)
 115
 116 /* Channel FD ioctl */
 117 #define LTTNG_KERNEL_STREAM                     _IO(0xF6, 0x60)
 118 #define LTTNG_KERNEL_EVENT                      \
 119         _IOW(0xF6, 0x61, struct lttng_kernel_event)
 120
 121 /* Event and Channel FD ioctl */
 122 #define LTTNG_KERNEL_CONTEXT                    \
 123         _IOW(0xF6, 0x70, struct lttng_kernel_context)
 124
 125 /* Event, Channel and Session ioctl */
 126 #define LTTNG_KERNEL_ENABLE                     _IO(0xF6, 0x80)
 127 #define LTTNG_KERNEL_DISABLE                    _IO(0xF6, 0x81)
 128
 129 #endif /* _LTT_DEBUGFS_ABI_H */