--- /dev/null
+#ifndef _LTTNG_UST_ABI_H
+#define _LTTNG_UST_ABI_H
+
+/*
+ * lttng-ust-abi.h
+ *
+ * Copyright 2010-2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * LTTng-UST ABI header
+ *
+ * Dual LGPL v2.1/GPL v2 license.
+ */
+
+#include <stdint.h>
+
+#define LTTNG_UST_SYM_NAME_LEN 128
+
+#define LTTNG_UST_COMM_VERSION_MAJOR 0
+#define LTTNG_UST_COMM_VERSION_MINOR 1
+
+enum lttng_ust_instrumentation {
+ LTTNG_UST_TRACEPOINT = 0,
+ LTTNG_UST_PROBE = 1,
+ LTTNG_UST_FUNCTION = 2,
+};
+
+enum lttng_ust_output {
+ LTTNG_UST_MMAP = 0,
+};
+
+struct lttng_ust_tracer_version {
+ uint32_t version;
+ uint32_t patchlevel;
+ uint32_t sublevel;
+};
+
+struct lttng_ust_channel {
+ int overwrite; /* 1: overwrite, 0: discard */
+ uint64_t subbuf_size; /* in bytes */
+ uint64_t num_subbuf;
+ unsigned int switch_timer_interval; /* usecs */
+ unsigned int read_timer_interval; /* usecs */
+ enum lttng_ust_output output; /* output mode */
+ /* The following fields are used internally within UST. */
+ int shm_fd;
+ int wait_fd;
+ uint64_t memory_map_size;
+};
+
+/*
+ * This structure is only used internally within UST. It is not per-se
+ * part of the communication between sessiond and UST.
+ */
+struct lttng_ust_stream {
+ int shm_fd;
+ int wait_fd;
+ uint64_t memory_map_size;
+};
+
+struct lttng_ust_event {
+ char name[LTTNG_UST_SYM_NAME_LEN]; /* event name */
+ enum lttng_ust_instrumentation instrumentation;
+ /* Per instrumentation type configuration */
+ union {
+ } u;
+};
+
+enum lttng_ust_context_type {
+ LTTNG_UST_CONTEXT_VTID = 0,
+ LTTNG_UST_CONTEXT_VPID = 1,
+ LTTNG_UST_CONTEXT_PTHREAD_ID = 2,
+ LTTNG_UST_CONTEXT_PROCNAME = 3,
+};
+
+struct lttng_ust_context {
+ enum lttng_ust_context_type ctx;
+ union {
+ } u;
+};
+
+#define _UST_CMD(minor) (minor)
+#define _UST_CMDR(minor, type) (minor)
+#define _UST_CMDW(minor, type) (minor)
+
+/* Handled by object descriptor */
+#define LTTNG_UST_RELEASE _UST_CMD(0x1)
+
+/* Handled by object cmd */
+
+/* LTTng-UST commands */
+#define LTTNG_UST_SESSION _UST_CMD(0x40)
+#define LTTNG_UST_TRACER_VERSION \
+ _UST_CMDR(0x41, struct lttng_ust_tracer_version)
+#define LTTNG_UST_TRACEPOINT_LIST _UST_CMD(0x42)
+#define LTTNG_UST_WAIT_QUIESCENT _UST_CMD(0x43)
+#define LTTNG_UST_REGISTER_DONE _UST_CMD(0x44)
+
+/* Session FD commands */
+#define LTTNG_UST_METADATA \
+ _UST_CMDW(0x50, struct lttng_ust_channel)
+#define LTTNG_UST_CHANNEL \
+ _UST_CMDW(0x51, struct lttng_ust_channel)
+#define LTTNG_UST_SESSION_START _UST_CMD(0x52)
+#define LTTNG_UST_SESSION_STOP _UST_CMD(0x53)
+
+/* Channel FD commands */
+#define LTTNG_UST_STREAM _UST_CMD(0x60)
+#define LTTNG_UST_EVENT \
+ _UST_CMDW(0x61, struct lttng_ust_event)
+
+/* Event and Channel FD commands */
+#define LTTNG_UST_CONTEXT \
+ _UST_CMDW(0x70, struct lttng_ust_context)
+
+/* Event, Channel and Session commands */
+#define LTTNG_UST_ENABLE _UST_CMD(0x80)
+#define LTTNG_UST_DISABLE _UST_CMD(0x81)
+
+#define LTTNG_UST_ROOT_HANDLE 0
+
+struct obj;
+
+struct objd_ops {
+ long (*cmd)(int objd, unsigned int cmd, unsigned long arg);
+ int (*release)(int objd);
+};
+
+/* Create root handle. Always ID 0. */
+int lttng_abi_create_root_handle(void);
+
+const struct objd_ops *objd_ops(int id);
+int objd_unref(int id);
+
+void lttng_ust_abi_exit(void);
+void ltt_events_exit(void);
+
+#endif /* _LTTNG_UST_ABI_H */