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