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 #define LTTNG_KPROBE_SYM_NAME_LEN       128
  15
  16 enum lttng_kernel_instrumentation {
  17         LTTNG_KERNEL_TRACEPOINTS,
  18         LTTNG_KERNEL_KPROBES,
  19         LTTNG_KERNEL_FUNCTION_TRACER,
  20 };
  21
  22 /*
  23  * LTTng DebugFS ABI structures.
  24  */
  25
  26 struct lttng_kernel_channel {
  27         int overwrite;                  /* 1: overwrite, 0: discard */
  28         uint64_t subbuf_size;
  29         uint64_t num_subbuf;
  30         unsigned int switch_timer_interval;
  31         unsigned int read_timer_interval;
  32 };
  33
  34 /*
  35  * Either addr is used, or symbol_name and offset.
  36  */
  37 struct lttng_kernel_kprobe {
  38         uint64_t addr;
  39
  40         uint64_t offset;
  41         char symbol_name[LTTNG_KPROBE_SYM_NAME_LEN];
  42 };
  43
  44 struct lttng_kernel_function_tracer {
  45         char symbol_name[LTTNG_KPROBE_SYM_NAME_LEN];
  46 };
  47
  48 struct lttng_kernel_event {
  49         enum lttng_kernel_instrumentation instrumentation;
  50         /* Per instrumentation type configuration */
  51         union {
  52                 struct lttng_kernel_kprobe kprobe;
  53                 struct lttng_kernel_function_tracer ftrace;
  54         } u;
  55         char name[];    /* event name */
  56 };
  57
  58 struct lttng_kernel_tracer_version {
  59         uint32_t version;
  60         uint32_t patchlevel;
  61         uint32_t sublevel;
  62 };
  63
  64 #define LTTNG_KERNEL_SESSION            _IO(0xF6, 0x40)
  65 #define LTTNG_KERNEL_SESSION_START      _IO(0xF6, 0x41)
  66 #define LTTNG_KERNEL_SESSION_STOP       _IO(0xF6, 0x42)
  67 #define LTTNG_KERNEL_CHANNEL            \
  68         _IOW(0xF6, 0x43, struct lttng_kernel_channel)
  69 #define LTTNG_KERNEL_STREAM             _IO(0xF6, 0x44)
  70 #define LTTNG_KERNEL_EVENT              \
  71         _IOW(0xF6, 0x45, struct lttng_kernel_event)
  72 #define LTTNG_KERNEL_METADATA           \
  73         _IOW(0xF6, 0x46, struct lttng_kernel_channel)
  74 #define LTTNG_KERNEL_KPROBE             \
  75         _IOW(0xF6, 0x47, struct lttng_kernel_kprobe)
  76 #define LTTNG_KERNEL_TRACER_VERSION     \
  77         _IOR(0xF6, 0x48, struct lttng_kernel_tracer_version)
  78
  79 #endif /* _LTT_DEBUGFS_ABI_H */