include/ust/lttng-ust-abi.h

   1 #ifndef _LTTNG_UST_ABI_H
   2 #define _LTTNG_UST_ABI_H
   3
   4 /*
   5  * lttng-ust-abi.h
   6  *
   7  * Copyright 2010-2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  *
   9  * LTTng-UST ABI header
  10  *
  11  * Dual LGPL v2.1/GPL v2 license.
  12  */
  13
  14 #define LTTNG_UST_SYM_NAME_LEN  128
  15
  16 enum lttng_ust_instrumentation {
  17         LTTNG_UST_TRACEPOINT    = 0,
  18 };
  19
  20 /*
  21  * LTTng consumer mode
  22  */
  23 enum lttng_ust_output {
  24         LTTNG_UST_MMAP  = 0,
  25 };
  26
  27 /*
  28  * LTTng DebugFS ABI structures.
  29  */
  30
  31 struct lttng_ust_channel {
  32         int overwrite;                          /* 1: overwrite, 0: discard */
  33         uint64_t subbuf_size;                   /* in bytes */
  34         uint64_t num_subbuf;
  35         unsigned int switch_timer_interval;     /* usecs */
  36         unsigned int read_timer_interval;       /* usecs */
  37         enum lttng_ust_output output;           /* mmap */
  38 };
  39
  40 struct lttng_ust_event {
  41         char name[LTTNG_UST_SYM_NAME_LEN];      /* event name */
  42         enum lttng_ust_instrumentation instrumentation;
  43         /* Per instrumentation type configuration */
  44         union {
  45         } u;
  46 };
  47
  48 struct lttng_ust_tracer_version {
  49         uint32_t version;
  50         uint32_t patchlevel;
  51         uint32_t sublevel;
  52 };
  53
  54 enum lttng_ust_context_type {
  55         LTTNG_UST_CONTEXT_VTID                  = 0,
  56 };
  57
  58 struct lttng_ust_context {
  59         enum lttng_ust_context_type ctx;
  60         union {
  61         } u;
  62 };
  63
  64 #define _UST_CMD(minor)                         (minor)
  65 #define _UST_CMDR(minor, type)                  (minor)
  66 #define _UST_CMDW(minor, type)                  (minor)
  67
  68 /* LTTng-UST commands */
  69 #define LTTNG_UST_SESSION                       _UST_CMD(0x40)
  70 #define LTTNG_UST_TRACER_VERSION                \
  71         _UST_CMDR(0x41, struct lttng_ust_tracer_version)
  72 #define LTTNG_UST_TRACEPOINT_LIST               _UST_CMD(0x42)
  73 #define LTTNG_UST_WAIT_QUIESCENT                _UST_CMD(0x43)
  74
  75 /* Session FD ioctl */
  76 #define LTTNG_UST_METADATA                      \
  77         _UST_CMDW(0x50, struct lttng_ust_channel)
  78 #define LTTNG_UST_CHANNEL                       \
  79         _UST_CMDW(0x51, struct lttng_ust_channel)
  80 #define LTTNG_UST_SESSION_START                 _UST_CMD(0x52)
  81 #define LTTNG_UST_SESSION_STOP                  _UST_CMD(0x53)
  82
  83 /* Channel FD ioctl */
  84 #define LTTNG_UST_STREAM                        _UST_CMD(0x60)
  85 #define LTTNG_UST_EVENT                 \
  86         _UST_CMDW(0x61, struct lttng_ust_event)
  87
  88 /* Event and Channel FD ioctl */
  89 #define LTTNG_UST_CONTEXT                       \
  90         _UST_CMDW(0x70, struct lttng_ust_context)
  91
  92 /* Event, Channel and Session ioctl */
  93 #define LTTNG_UST_ENABLE                        _UST_CMD(0x80)
  94 #define LTTNG_UST_DISABLE                       _UST_CMD(0x81)
  95
  96 #endif /* _LTTNG_UST_ABI_H */