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
  12 #include <linux/fs.h>
  13
  14 enum lttng_kernel_instrumentation {
  15         LTTNG_KERNEL_TRACEPOINTS,
  16         LTTNG_KERNEL_KPROBES,
  17 };
  18
  19 /*
  20  * LTTng DebugFS ABI structures.
  21  */
  22
  23 struct lttng_kernel_channel {
  24         int overwrite;                  /* 1: overwrite, 0: discard */
  25         u64 subbuf_size;
  26         u64 num_subbuf;
  27         unsigned int switch_timer_interval;
  28         unsigned int read_timer_interval;
  29 };
  30
  31 struct lttng_kernel_event {
  32         enum lttng_kernel_instrumentation instrumentation;
  33         char name[];
  34 };
  35
  36 /*
  37  * Either addr is used, or symbol_name and offset.
  38  */
  39 struct lttng_kernel_kprobe {
  40         u64 addr;
  41
  42         u64 offset;
  43         char symbol_name[];
  44 };
  45
  46 #define LTTNG_KERNEL_SESSION            _IO(0xF6, 0x40)
  47 #define LTTNG_KERNEL_SESSION_START      _IO(0xF6, 0x41)
  48 #define LTTNG_KERNEL_SESSION_STOP       _IO(0xF6, 0x42)
  49 #define LTTNG_KERNEL_CHANNEL            \
  50         _IOW(0xF6, 0x43, struct lttng_kernel_channel)
  51 #define LTTNG_KERNEL_STREAM             _IO(0xF6, 0x44)
  52 #define LTTNG_KERNEL_EVENT              \
  53         _IOW(0xF6, 0x45, struct lttng_kernel_event)
  54 #define LTTNG_KERNEL_METADATA           \
  55         _IOW(0xF6, 0x46, struct lttng_kernel_channel)
  56 #define LTTNG_KERNEL_KPROBE             \
  57         _IOW(0xF6, 0x47, struct lttng_kernel_kprobe)
  58 #define LTTNG_KERNEL_TRACER_VERSION     \
  59         _IOW(0xF6, 0x48, struct lttng_kernel_tracer_version)
  60
  61 #endif /* _LTT_DEBUGFS_ABI_H */