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         LTTNG_KERNEL_KRETPROBE  = 3,
  23 };
  24
  25 /*
  26  * LTTng consumer mode
  27  */
  28 enum lttng_kernel_output {
  29         LTTNG_KERNEL_SPLICE     = 0,
  30         LTTNG_KERNEL_MMAP       = 1,
  31 };
  32
  33 /*
  34  * LTTng DebugFS ABI structures.
  35  */
  36
  37 struct lttng_kernel_channel {
  38         int overwrite;                          /* 1: overwrite, 0: discard */
  39         uint64_t subbuf_size;                   /* in bytes */
  40         uint64_t num_subbuf;
  41         unsigned int switch_timer_interval;     /* usecs */
  42         unsigned int read_timer_interval;       /* usecs */
  43         enum lttng_kernel_output output;        /* splice, mmap */
  44 };
  45
  46 struct lttng_kernel_kretprobe {
  47         uint64_t addr;
  48
  49         uint64_t offset;
  50         char symbol_name[LTTNG_SYM_NAME_LEN];
  51 };
  52
  53 /*
  54  * Either addr is used, or symbol_name and offset.
  55  */
  56 struct lttng_kernel_kprobe {
  57         uint64_t addr;
  58
  59         uint64_t offset;
  60         char symbol_name[LTTNG_SYM_NAME_LEN];
  61 };
  62
  63 struct lttng_kernel_function_tracer {
  64         char symbol_name[LTTNG_SYM_NAME_LEN];
  65 };
  66
  67 struct lttng_kernel_event {
  68         char name[LTTNG_SYM_NAME_LEN];  /* event name */
  69         enum lttng_kernel_instrumentation instrumentation;
  70         /* Per instrumentation type configuration */
  71         union {
  72                 struct lttng_kernel_kretprobe kretprobe;
  73                 struct lttng_kernel_kprobe kprobe;
  74                 struct lttng_kernel_function_tracer ftrace;
  75         } u;
  76 };
  77
  78 struct lttng_kernel_tracer_version {
  79         uint32_t version;
  80         uint32_t patchlevel;
  81         uint32_t sublevel;
  82 };
  83
  84 enum lttng_kernel_context_type {
  85         LTTNG_KERNEL_CONTEXT_PID                = 0,
  86         LTTNG_KERNEL_CONTEXT_PERF_COUNTER       = 1,
  87         LTTNG_KERNEL_CONTEXT_COMM               = 2,
  88         LTTNG_KERNEL_CONTEXT_PRIO               = 3,
  89         LTTNG_KERNEL_CONTEXT_NICE               = 4,
  90         LTTNG_KERNEL_CONTEXT_VPID               = 5,
  91         LTTNG_KERNEL_CONTEXT_TID                = 6,
  92         LTTNG_KERNEL_CONTEXT_VTID               = 7,
  93         LTTNG_KERNEL_CONTEXT_PPID               = 8,
  94         LTTNG_KERNEL_CONTEXT_VPPID              = 9,
  95 };
  96
  97 struct lttng_kernel_perf_counter_ctx {
  98         uint32_t type;
  99         uint64_t config;
 100         char name[LTTNG_SYM_NAME_LEN];
 101 };
 102
 103 struct lttng_kernel_context {
 104         enum lttng_kernel_context_type ctx;
 105         union {
 106                 struct lttng_kernel_perf_counter_ctx perf_counter;
 107         } u;
 108 };
 109
 110 /* LTTng file descriptor ioctl */
 111 #define LTTNG_KERNEL_SESSION                    _IO(0xF6, 0x40)
 112 #define LTTNG_KERNEL_TRACER_VERSION             \
 113         _IOR(0xF6, 0x41, struct lttng_kernel_tracer_version)
 114 #define LTTNG_KERNEL_TRACEPOINT_LIST            _IO(0xF6, 0x42)
 115 #define LTTNG_KERNEL_WAIT_QUIESCENT             _IO(0xF6, 0x43)
 116
 117 /* Session FD ioctl */
 118 #define LTTNG_KERNEL_METADATA                   \
 119         _IOW(0xF6, 0x50, struct lttng_kernel_channel)
 120 #define LTTNG_KERNEL_CHANNEL                    \
 121         _IOW(0xF6, 0x51, struct lttng_kernel_channel)
 122 #define LTTNG_KERNEL_SESSION_START              _IO(0xF6, 0x52)
 123 #define LTTNG_KERNEL_SESSION_STOP               _IO(0xF6, 0x53)
 124
 125 /* Channel FD ioctl */
 126 #define LTTNG_KERNEL_STREAM                     _IO(0xF6, 0x60)
 127 #define LTTNG_KERNEL_EVENT                      \
 128         _IOW(0xF6, 0x61, struct lttng_kernel_event)
 129
 130 /* Event and Channel FD ioctl */
 131 #define LTTNG_KERNEL_CONTEXT                    \
 132         _IOW(0xF6, 0x70, struct lttng_kernel_context)
 133
 134 /* Event, Channel and Session ioctl */
 135 #define LTTNG_KERNEL_ENABLE                     _IO(0xF6, 0x80)
 136 #define LTTNG_KERNEL_DISABLE                    _IO(0xF6, 0x81)
 137
 138 #endif /* _LTT_DEBUGFS_ABI_H */