+void ustctl_clear_buffer(struct ustctl_consumer_stream *stream);
+
+/* index */
+
+/*
+ * Getters which need to be used on the current packet (between get/put
+ * or get_next/put_next.
+ */
+
+int ustctl_get_timestamp_begin(struct ustctl_consumer_stream *stream,
+ uint64_t *timestamp_begin);
+int ustctl_get_timestamp_end(struct ustctl_consumer_stream *stream,
+ uint64_t *timestamp_end);
+int ustctl_get_events_discarded(struct ustctl_consumer_stream *stream,
+ uint64_t *events_discarded);
+int ustctl_get_content_size(struct ustctl_consumer_stream *stream,
+ uint64_t *content_size);
+int ustctl_get_packet_size(struct ustctl_consumer_stream *stream,
+ uint64_t *packet_size);
+int ustctl_get_sequence_number(struct ustctl_consumer_stream *stream,
+ uint64_t *seq);
+
+/*
+ * Getter returning state invariant for the stream, which can be used
+ * without "get" operation.
+ */
+
+int ustctl_get_stream_id(struct ustctl_consumer_stream *stream,
+ uint64_t *stream_id);
+int ustctl_get_instance_id(struct ustctl_consumer_stream *stream,
+ uint64_t *id);
+
+/*
+ * Getter returning the current timestamp as perceived from the
+ * tracer.
+ */
+int ustctl_get_current_timestamp(struct ustctl_consumer_stream *stream,
+ uint64_t *ts);
+
+/* returns whether UST has perf counters support. */
+int ustctl_has_perf_counters(void);
+
+/* Regenerate the statedump. */
+int ustctl_regenerate_statedump(int sock, int handle);
+
+/* event registry management */
+
+enum ustctl_socket_type {
+ USTCTL_SOCKET_CMD = 0,
+ USTCTL_SOCKET_NOTIFY = 1,
+};
+
+enum ustctl_notify_cmd {
+ USTCTL_NOTIFY_CMD_EVENT = 0,
+ USTCTL_NOTIFY_CMD_CHANNEL = 1,
+ USTCTL_NOTIFY_CMD_ENUM = 2,
+};
+
+enum ustctl_channel_header {
+ USTCTL_CHANNEL_HEADER_UNKNOWN = 0,
+ USTCTL_CHANNEL_HEADER_COMPACT = 1,
+ USTCTL_CHANNEL_HEADER_LARGE = 2,
+};
+
+/* event type structures */
+
+enum ustctl_abstract_types {
+ ustctl_atype_integer,
+ ustctl_atype_enum,
+ ustctl_atype_array,
+ ustctl_atype_sequence,
+ ustctl_atype_string,
+ ustctl_atype_float,
+ ustctl_atype_variant,
+ ustctl_atype_struct,
+ NR_USTCTL_ABSTRACT_TYPES,
+};
+
+enum ustctl_string_encodings {
+ ustctl_encode_none = 0,
+ ustctl_encode_UTF8 = 1,
+ ustctl_encode_ASCII = 2,
+ NR_USTCTL_STRING_ENCODINGS,
+};
+
+#define USTCTL_UST_INTEGER_TYPE_PADDING 24
+struct ustctl_integer_type {
+ uint32_t size; /* in bits */
+ uint32_t signedness;
+ uint32_t reverse_byte_order;
+ uint32_t base; /* 2, 8, 10, 16, for pretty print */
+ int32_t encoding; /* enum ustctl_string_encodings */
+ uint16_t alignment; /* in bits */
+ char padding[USTCTL_UST_INTEGER_TYPE_PADDING];
+} LTTNG_PACKED;
+
+#define USTCTL_UST_FLOAT_TYPE_PADDING 24
+struct ustctl_float_type {
+ uint32_t exp_dig; /* exponent digits, in bits */
+ uint32_t mant_dig; /* mantissa digits, in bits */
+ uint32_t reverse_byte_order;
+ uint16_t alignment; /* in bits */
+ char padding[USTCTL_UST_FLOAT_TYPE_PADDING];
+} LTTNG_PACKED;
+
+#define USTCTL_UST_ENUM_VALUE_PADDING 15
+struct ustctl_enum_value {
+ uint64_t value;
+ uint8_t signedness;
+ char padding[USTCTL_UST_ENUM_VALUE_PADDING];
+} LTTNG_PACKED;
+
+enum ustctl_ust_enum_entry_options {
+ USTCTL_UST_ENUM_ENTRY_OPTION_IS_AUTO = 1U << 0,
+};
+
+#define USTCTL_UST_ENUM_ENTRY_PADDING 32
+struct ustctl_enum_entry {
+ struct ustctl_enum_value start, end; /* start and end are inclusive */
+ char string[LTTNG_UST_SYM_NAME_LEN];
+ union {
+ struct {
+ uint32_t options;
+ } LTTNG_PACKED extra;
+ char padding[USTCTL_UST_ENUM_ENTRY_PADDING];
+ } u;
+} LTTNG_PACKED;
+
+#define USTCTL_UST_BASIC_TYPE_PADDING 296
+union _ustctl_basic_type {
+ struct ustctl_integer_type integer;
+ struct {
+ char name[LTTNG_UST_SYM_NAME_LEN];
+ struct ustctl_integer_type container_type;
+ uint64_t id; /* enum ID in sessiond. */
+ } enumeration;
+ struct {
+ int32_t encoding; /* enum ustctl_string_encodings */
+ } string;
+ struct ustctl_float_type _float;
+ char padding[USTCTL_UST_BASIC_TYPE_PADDING];
+} LTTNG_PACKED;
+
+struct ustctl_basic_type {
+ enum ustctl_abstract_types atype;
+ union {
+ union _ustctl_basic_type basic;
+ } u;
+} LTTNG_PACKED;