[lttng-tools.git] / src / common / sessiond-comm / relayd.hpp

/*
 * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
 * Copyright (C) 2012 Julien Desfossez <julien.desfossez@efficios.com>
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 */

#ifndef _RELAYD_COMM
#define _RELAYD_COMM

#include <common/compiler.hpp>
#include <common/defaults.hpp>
#include <common/index/ctf-index.hpp>
#include <common/macros.hpp>
#include <common/optional.hpp>
#include <common/uuid.hpp>

#include <lttng/lttng.h>

#include <limits.h>
#include <stdint.h>

#define RELAYD_VERSION_COMM_MAJOR VERSION_MAJOR
#define RELAYD_VERSION_COMM_MINOR VERSION_MINOR

#define RELAYD_COMM_LTTNG_HOST_NAME_MAX_2_4 64
#define RELAYD_COMM_LTTNG_NAME_MAX_2_4	    255
#define RELAYD_COMM_LTTNG_PATH_MAX	    4096
#define RELAYD_COMM_DEFAULT_STREAM_NAME_LEN 264 /* 256 + 8 */

/*
 * lttng-relayd communication header.
 */
struct lttcomm_relayd_hdr {
	/* Circuit ID not used for now so always ignored */
	uint64_t circuit_id;
	uint64_t data_size; /* data size following this header */
	uint32_t cmd; /* enum lttcomm_relayd_command */
	uint32_t cmd_version; /* command version */
} LTTNG_PACKED;

/*
 * lttng-relayd data header.
 */
struct lttcomm_relayd_data_hdr {
	/* Circuit ID not used for now so always ignored */
	uint64_t circuit_id;
	uint64_t stream_id; /* Stream ID known by the relayd */
	uint64_t net_seq_num; /* Network sequence number, per stream. */
	uint32_t data_size; /* data size following this header */
	uint32_t padding_size; /* Size of 0 padding the data */
} LTTNG_PACKED;

/*
 * Reply from a create session command.
 */
struct lttcomm_relayd_status_session {
	uint64_t session_id;
	uint32_t ret_code;
} LTTNG_PACKED;

/*
 * Used to add a stream on the relay daemon.
 */
struct lttcomm_relayd_add_stream {
	char channel_name[RELAYD_COMM_DEFAULT_STREAM_NAME_LEN];
	char pathname[RELAYD_COMM_LTTNG_PATH_MAX];
} LTTNG_PACKED;

/*
 * Used to add a stream on the relay daemon.
 * Protocol version 2.2
 */
struct lttcomm_relayd_add_stream_2_2 {
	char channel_name[RELAYD_COMM_DEFAULT_STREAM_NAME_LEN];
	char pathname[RELAYD_COMM_LTTNG_PATH_MAX];
	uint64_t tracefile_size;
	uint64_t tracefile_count;
} LTTNG_PACKED;

struct lttcomm_relayd_add_stream_2_11 {
	uint32_t channel_name_len;
	uint32_t pathname_len;
	uint64_t tracefile_size;
	uint64_t tracefile_count;
	uint64_t trace_chunk_id;
	char names[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
} LTTNG_PACKED;

/*
 * Answer from an add stream command.
 */
struct lttcomm_relayd_status_stream {
	uint64_t handle;
	uint32_t ret_code;
} LTTNG_PACKED;

/*
 * Used to return command code for command not needing special data.
 */
struct lttcomm_relayd_generic_reply {
	uint32_t ret_code;
} LTTNG_PACKED;

/*
 * Version command.
 */
struct lttcomm_relayd_version {
	uint32_t major;
	uint32_t minor;
} LTTNG_PACKED;

/*
 * Metadata payload used when metadata command is sent.
 */
struct lttcomm_relayd_metadata_payload {
	uint64_t stream_id;
	uint32_t padding_size;
	char payload[];
} LTTNG_PACKED;

/*
 * Used to indicate that a specific stream id can now be closed.
 */
struct lttcomm_relayd_close_stream {
	uint64_t stream_id;
	uint64_t last_net_seq_num; /* sequence number of last packet */
} LTTNG_PACKED;

/*
 * Used to test if for a given stream id the data is pending on the relayd side
 * for reading.
 */
struct lttcomm_relayd_data_pending {
	uint64_t stream_id;
	uint64_t last_net_seq_num; /* Sequence number of the last packet */
} LTTNG_PACKED;

struct lttcomm_relayd_begin_data_pending {
	uint64_t session_id;
} LTTNG_PACKED;

struct lttcomm_relayd_end_data_pending {
	uint64_t session_id;
} LTTNG_PACKED;

struct lttcomm_relayd_quiescent_control {
	uint64_t stream_id;
} LTTNG_PACKED;

/*
 * Index data.
 */
struct lttcomm_relayd_index {
	uint64_t relay_stream_id;
	uint64_t net_seq_num;
	uint64_t packet_size;
	uint64_t content_size;
	uint64_t timestamp_begin;
	uint64_t timestamp_end;
	uint64_t events_discarded;
	uint64_t stream_id;
	/* 2.8+ */
	uint64_t stream_instance_id;
	uint64_t packet_seq_num;
} LTTNG_PACKED;

static inline size_t lttcomm_relayd_index_len(uint32_t major, uint32_t minor)
{
	if (major == 1) {
		switch (minor) {
		case 0:
			return offsetof(struct lttcomm_relayd_index, stream_id) +
				member_sizeof(struct lttcomm_relayd_index, stream_id);
		case 1:
			return offsetof(struct lttcomm_relayd_index, packet_seq_num) +
				member_sizeof(struct lttcomm_relayd_index, packet_seq_num);
		default:
			abort();
		}
	}
	abort();
}

/*
 * Create session in 2.4 adds additionnal parameters for live reading.
 */
struct lttcomm_relayd_create_session_2_4 {
	char session_name[RELAYD_COMM_LTTNG_NAME_MAX_2_4];
	char hostname[RELAYD_COMM_LTTNG_HOST_NAME_MAX_2_4];
	uint32_t live_timer;
	uint32_t snapshot;
} LTTNG_PACKED;

struct lttcomm_relayd_create_session_2_11 {
	uint32_t session_name_len;
	uint32_t hostname_len;
	/* Optional, set to 0 to indicate it is not user-specified. */
	uint32_t base_path_len;
	uint32_t live_timer;
	uint8_t snapshot;
	uint8_t session_name_contains_creation_time;
	/* Sessiond instance UUID */
	uint8_t sessiond_uuid[LTTNG_UUID_LEN];
	/* Sessiond session id */
	uint64_t session_id;
	/* Session creation time, in seconds since UNIX Epoch. */
	uint64_t creation_time;
	LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED current_chunk_id;
	/* Contains the session_name, hostname, base_path. */
	char names[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
} LTTNG_PACKED;

struct lttcomm_relayd_create_session_reply_2_11 {
	struct lttcomm_relayd_status_session generic;
	/* Includes the '\0' terminator. */
	uint32_t output_path_length;
	char output_path[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
} LTTNG_PACKED;

/*
 * Used to ask the relay to reset the metadata trace file (regeneration).
 * Send the new version of the metadata (starts at 0).
 */
struct lttcomm_relayd_reset_metadata {
	uint64_t stream_id;
	uint64_t version;
} LTTNG_PACKED;

struct lttcomm_relayd_stream_rotation_position {
	uint64_t stream_id;
	/*
	 * Sequence number of the first packet belonging to the new
	 * "destination" trace chunk to which the stream is rotating.
	 *
	 * Ignored for metadata streams.
	 */
	uint64_t rotate_at_seq_num;
} LTTNG_PACKED;

/*
 * For certain releases, the LTTNG_PACKED annotation was missing on the
 * `new_chunk_id` field which causes padding to be added between the
 * "optional" structure's `is_set` and `value` fields.
 *
 * Three alignment cases are handled:
 *   - `value` is aligned to the next byte boundary after `is_set`
 *     no padding is produced, see
 *     `struct lttcomm_relayd_rotate_streams_packed`,
 *   - `value` is aligned to the next 4-byte boundary after `is_set`
 *     (e.g. x86), 3 bytes of padding are produced, see
 *     `struct lttcomm_relayd_rotate_streams_3_bytes_padding`,
 *   - `value` is aligned to the next 8-byte boundary after `is_set`
 *     (e.g. x86-64), 7 bytes of padding are produced, see
 *     `struct lttcomm_relayd_rotate_streams_7_bytes_padding`.
 *
 * Note that since this structure's advertised size is used to determine
 * the size of the padding it includes, it can't be extended with new
 * optional fields. A new command would be needed.
 */
struct lttcomm_relayd_rotate_streams {
	uint32_t stream_count;
	/*
	 * Streams can be rotated outside of a chunk but not be parented to
	 * a new chunk.
	 *
	 * Improperly packed, but left as-is for backwards compatibility
	 * with unpatched relay daemons.
	 */
	LTTNG_OPTIONAL_COMM(uint64_t) new_chunk_id;
	/* `stream_count` positions follow. */
	struct lttcomm_relayd_stream_rotation_position rotation_positions[];
} LTTNG_PACKED;

struct lttcomm_relayd_rotate_streams_packed {
	uint32_t stream_count;
	LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED new_chunk_id;
	struct lttcomm_relayd_stream_rotation_position rotation_positions[];
} LTTNG_PACKED;

struct lttcomm_relayd_rotate_streams_3_bytes_padding {
	uint32_t stream_count;
	struct {
		union {
			uint8_t is_set;
			uint32_t padding;
		};
		uint64_t value;
	} LTTNG_PACKED new_chunk_id;
	struct lttcomm_relayd_stream_rotation_position rotation_positions[];
} LTTNG_PACKED;

struct lttcomm_relayd_rotate_streams_7_bytes_padding {
	uint32_t stream_count;
	struct {
		union {
			uint8_t is_set;
			uint64_t padding;
		};
		uint64_t value;
	} LTTNG_PACKED new_chunk_id;
	struct lttcomm_relayd_stream_rotation_position rotation_positions[];
} LTTNG_PACKED;

struct lttcomm_relayd_create_trace_chunk {
	uint64_t chunk_id;
	/* Seconds since EPOCH. */
	uint64_t creation_timestamp;
	/* Includes trailing NULL. */
	uint32_t override_name_length;
	char override_name[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
} LTTNG_PACKED;

struct lttcomm_relayd_close_trace_chunk {
	uint64_t chunk_id;
	/* Seconds since EPOCH. */
	uint64_t close_timestamp;
	/* enum lttng_trace_chunk_command_type */
	LTTNG_OPTIONAL_COMM(uint32_t) LTTNG_PACKED close_command;
} LTTNG_PACKED;

struct lttcomm_relayd_close_trace_chunk_reply {
	struct lttcomm_relayd_generic_reply generic;
	/* Includes trailing NULL. */
	uint32_t path_length;
	char path[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
} LTTNG_PACKED;

struct lttcomm_relayd_trace_chunk_exists {
	uint64_t chunk_id;
} LTTNG_PACKED;

struct lttcomm_relayd_trace_chunk_exists_reply {
	struct lttcomm_relayd_generic_reply generic;
	uint8_t trace_chunk_exists;
} LTTNG_PACKED;

enum lttcomm_relayd_configuration_flag {
	/* The relay daemon (2.12) is configured to allow clear operations. */
	LTTCOMM_RELAYD_CONFIGURATION_FLAG_CLEAR_ALLOWED = (1 << 0),
};

struct lttcomm_relayd_get_configuration {
	uint64_t query_flags;
} LTTNG_PACKED;

/*
 * Used to return a relay daemon's configuration in reply to the
 * RELAYD_GET_CONFIGURATION command.
 */
struct lttcomm_relayd_get_configuration_reply {
	struct lttcomm_relayd_generic_reply generic;
	/* Set of lttcomm_relayd_configuration_flag. */
	uint64_t relayd_configuration_flags;
	/* Optional variable-length payload. */
	char payload[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
} LTTNG_PACKED;

#endif /* _RELAYD_COMM */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
	3	* Copyright (C) 2012 Julien Desfossez <julien.desfossez@efficios.com>
	4	*
	5	* SPDX-License-Identifier: GPL-2.0-only
	6	*
	7	*/
	8
	9	#ifndef _RELAYD_COMM
	10	#define _RELAYD_COMM
	11
	12	#include <common/compiler.hpp>
	13	#include <common/defaults.hpp>
	14	#include <common/index/ctf-index.hpp>
	15	#include <common/macros.hpp>
	16	#include <common/optional.hpp>
	17	#include <common/uuid.hpp>
	18
	19	#include <lttng/lttng.h>
	20
	21	#include <limits.h>
	22	#include <stdint.h>
	23
	24	#define RELAYD_VERSION_COMM_MAJOR VERSION_MAJOR
	25	#define RELAYD_VERSION_COMM_MINOR VERSION_MINOR
	26
	27	#define RELAYD_COMM_LTTNG_HOST_NAME_MAX_2_4 64
	28	#define RELAYD_COMM_LTTNG_NAME_MAX_2_4 255
	29	#define RELAYD_COMM_LTTNG_PATH_MAX 4096
	30	#define RELAYD_COMM_DEFAULT_STREAM_NAME_LEN 264 /* 256 + 8 */
	31
	32	/*
	33	* lttng-relayd communication header.
	34	*/
	35	struct lttcomm_relayd_hdr {
	36	/* Circuit ID not used for now so always ignored */
	37	uint64_t circuit_id;
	38	uint64_t data_size; /* data size following this header */
	39	uint32_t cmd; /* enum lttcomm_relayd_command */
	40	uint32_t cmd_version; /* command version */
	41	} LTTNG_PACKED;
	42
	43	/*
	44	* lttng-relayd data header.
	45	*/
	46	struct lttcomm_relayd_data_hdr {
	47	/* Circuit ID not used for now so always ignored */
	48	uint64_t circuit_id;
	49	uint64_t stream_id; /* Stream ID known by the relayd */
	50	uint64_t net_seq_num; /* Network sequence number, per stream. */
	51	uint32_t data_size; /* data size following this header */
	52	uint32_t padding_size; /* Size of 0 padding the data */
	53	} LTTNG_PACKED;
	54
	55	/*
	56	* Reply from a create session command.
	57	*/
	58	struct lttcomm_relayd_status_session {
	59	uint64_t session_id;
	60	uint32_t ret_code;
	61	} LTTNG_PACKED;
	62
	63	/*
	64	* Used to add a stream on the relay daemon.
	65	*/
	66	struct lttcomm_relayd_add_stream {
	67	char channel_name[RELAYD_COMM_DEFAULT_STREAM_NAME_LEN];
	68	char pathname[RELAYD_COMM_LTTNG_PATH_MAX];
	69	} LTTNG_PACKED;
	70
	71	/*
	72	* Used to add a stream on the relay daemon.
	73	* Protocol version 2.2
	74	*/
	75	struct lttcomm_relayd_add_stream_2_2 {
	76	char channel_name[RELAYD_COMM_DEFAULT_STREAM_NAME_LEN];
	77	char pathname[RELAYD_COMM_LTTNG_PATH_MAX];
	78	uint64_t tracefile_size;
	79	uint64_t tracefile_count;
	80	} LTTNG_PACKED;
	81
	82	struct lttcomm_relayd_add_stream_2_11 {
	83	uint32_t channel_name_len;
	84	uint32_t pathname_len;
	85	uint64_t tracefile_size;
	86	uint64_t tracefile_count;
	87	uint64_t trace_chunk_id;
	88	char names[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
	89	} LTTNG_PACKED;
	90
	91	/*
	92	* Answer from an add stream command.
	93	*/
	94	struct lttcomm_relayd_status_stream {
	95	uint64_t handle;
	96	uint32_t ret_code;
	97	} LTTNG_PACKED;
	98
	99	/*
	100	* Used to return command code for command not needing special data.
	101	*/
	102	struct lttcomm_relayd_generic_reply {
	103	uint32_t ret_code;
	104	} LTTNG_PACKED;
	105
	106	/*
	107	* Version command.
	108	*/
	109	struct lttcomm_relayd_version {
	110	uint32_t major;
	111	uint32_t minor;
	112	} LTTNG_PACKED;
	113
	114	/*
	115	* Metadata payload used when metadata command is sent.
	116	*/
	117	struct lttcomm_relayd_metadata_payload {
	118	uint64_t stream_id;
	119	uint32_t padding_size;
	120	char payload[];
	121	} LTTNG_PACKED;
	122
	123	/*
	124	* Used to indicate that a specific stream id can now be closed.
	125	*/
	126	struct lttcomm_relayd_close_stream {
	127	uint64_t stream_id;
	128	uint64_t last_net_seq_num; /* sequence number of last packet */
	129	} LTTNG_PACKED;
	130
	131	/*
	132	* Used to test if for a given stream id the data is pending on the relayd side
	133	* for reading.
	134	*/
	135	struct lttcomm_relayd_data_pending {
	136	uint64_t stream_id;
	137	uint64_t last_net_seq_num; /* Sequence number of the last packet */
	138	} LTTNG_PACKED;
	139
	140	struct lttcomm_relayd_begin_data_pending {
	141	uint64_t session_id;
	142	} LTTNG_PACKED;
	143
	144	struct lttcomm_relayd_end_data_pending {
	145	uint64_t session_id;
	146	} LTTNG_PACKED;
	147
	148	struct lttcomm_relayd_quiescent_control {
	149	uint64_t stream_id;
	150	} LTTNG_PACKED;
	151
	152	/*
	153	* Index data.
	154	*/
	155	struct lttcomm_relayd_index {
	156	uint64_t relay_stream_id;
	157	uint64_t net_seq_num;
	158	uint64_t packet_size;
	159	uint64_t content_size;
	160	uint64_t timestamp_begin;
	161	uint64_t timestamp_end;
	162	uint64_t events_discarded;
	163	uint64_t stream_id;
	164	/* 2.8+ */
	165	uint64_t stream_instance_id;
	166	uint64_t packet_seq_num;
	167	} LTTNG_PACKED;
	168
	169	static inline size_t lttcomm_relayd_index_len(uint32_t major, uint32_t minor)
	170	{
	171	if (major == 1) {
	172	switch (minor) {
	173	case 0:
	174	return offsetof(struct lttcomm_relayd_index, stream_id) +
	175	member_sizeof(struct lttcomm_relayd_index, stream_id);
	176	case 1:
	177	return offsetof(struct lttcomm_relayd_index, packet_seq_num) +
	178	member_sizeof(struct lttcomm_relayd_index, packet_seq_num);
	179	default:
	180	abort();
	181	}
	182	}
	183	abort();
	184	}
	185
	186	/*
	187	* Create session in 2.4 adds additionnal parameters for live reading.
	188	*/
	189	struct lttcomm_relayd_create_session_2_4 {
	190	char session_name[RELAYD_COMM_LTTNG_NAME_MAX_2_4];
	191	char hostname[RELAYD_COMM_LTTNG_HOST_NAME_MAX_2_4];
	192	uint32_t live_timer;
	193	uint32_t snapshot;
	194	} LTTNG_PACKED;
	195
	196	struct lttcomm_relayd_create_session_2_11 {
	197	uint32_t session_name_len;
	198	uint32_t hostname_len;
	199	/* Optional, set to 0 to indicate it is not user-specified. */
	200	uint32_t base_path_len;
	201	uint32_t live_timer;
	202	uint8_t snapshot;
	203	uint8_t session_name_contains_creation_time;
	204	/* Sessiond instance UUID */
	205	uint8_t sessiond_uuid[LTTNG_UUID_LEN];
	206	/* Sessiond session id */
	207	uint64_t session_id;
	208	/* Session creation time, in seconds since UNIX Epoch. */
	209	uint64_t creation_time;
	210	LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED current_chunk_id;
	211	/* Contains the session_name, hostname, base_path. */
	212	char names[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
	213	} LTTNG_PACKED;
	214
	215	struct lttcomm_relayd_create_session_reply_2_11 {
	216	struct lttcomm_relayd_status_session generic;
	217	/* Includes the '\0' terminator. */
	218	uint32_t output_path_length;
	219	char output_path[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
	220	} LTTNG_PACKED;
	221
	222	/*
	223	* Used to ask the relay to reset the metadata trace file (regeneration).
	224	* Send the new version of the metadata (starts at 0).
	225	*/
	226	struct lttcomm_relayd_reset_metadata {
	227	uint64_t stream_id;
	228	uint64_t version;
	229	} LTTNG_PACKED;
	230
	231	struct lttcomm_relayd_stream_rotation_position {
	232	uint64_t stream_id;
	233	/*
	234	* Sequence number of the first packet belonging to the new
	235	* "destination" trace chunk to which the stream is rotating.
	236	*
	237	* Ignored for metadata streams.
	238	*/
	239	uint64_t rotate_at_seq_num;
	240	} LTTNG_PACKED;
	241
	242	/*
	243	* For certain releases, the LTTNG_PACKED annotation was missing on the
	244	* `new_chunk_id` field which causes padding to be added between the
	245	* "optional" structure's `is_set` and `value` fields.
	246	*
	247	* Three alignment cases are handled:
	248	* - `value` is aligned to the next byte boundary after `is_set`
	249	* no padding is produced, see
	250	* `struct lttcomm_relayd_rotate_streams_packed`,
	251	* - `value` is aligned to the next 4-byte boundary after `is_set`
	252	* (e.g. x86), 3 bytes of padding are produced, see
	253	* `struct lttcomm_relayd_rotate_streams_3_bytes_padding`,
	254	* - `value` is aligned to the next 8-byte boundary after `is_set`
	255	* (e.g. x86-64), 7 bytes of padding are produced, see
	256	* `struct lttcomm_relayd_rotate_streams_7_bytes_padding`.
	257	*
	258	* Note that since this structure's advertised size is used to determine
	259	* the size of the padding it includes, it can't be extended with new
	260	* optional fields. A new command would be needed.
	261	*/
	262	struct lttcomm_relayd_rotate_streams {
	263	uint32_t stream_count;
	264	/*
	265	* Streams can be rotated outside of a chunk but not be parented to
	266	* a new chunk.
	267	*
	268	* Improperly packed, but left as-is for backwards compatibility
	269	* with unpatched relay daemons.
	270	*/
	271	LTTNG_OPTIONAL_COMM(uint64_t) new_chunk_id;
	272	/* `stream_count` positions follow. */
	273	struct lttcomm_relayd_stream_rotation_position rotation_positions[];
	274	} LTTNG_PACKED;
	275
	276	struct lttcomm_relayd_rotate_streams_packed {
	277	uint32_t stream_count;
	278	LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED new_chunk_id;
	279	struct lttcomm_relayd_stream_rotation_position rotation_positions[];
	280	} LTTNG_PACKED;
	281
	282	struct lttcomm_relayd_rotate_streams_3_bytes_padding {
	283	uint32_t stream_count;
	284	struct {
	285	union {
	286	uint8_t is_set;
	287	uint32_t padding;
	288	};
	289	uint64_t value;
	290	} LTTNG_PACKED new_chunk_id;
	291	struct lttcomm_relayd_stream_rotation_position rotation_positions[];
	292	} LTTNG_PACKED;
	293
	294	struct lttcomm_relayd_rotate_streams_7_bytes_padding {
	295	uint32_t stream_count;
	296	struct {
	297	union {
	298	uint8_t is_set;
	299	uint64_t padding;
	300	};
	301	uint64_t value;
	302	} LTTNG_PACKED new_chunk_id;
	303	struct lttcomm_relayd_stream_rotation_position rotation_positions[];
	304	} LTTNG_PACKED;
	305
	306	struct lttcomm_relayd_create_trace_chunk {
	307	uint64_t chunk_id;
	308	/* Seconds since EPOCH. */
	309	uint64_t creation_timestamp;
	310	/* Includes trailing NULL. */
	311	uint32_t override_name_length;
	312	char override_name[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
	313	} LTTNG_PACKED;
	314
	315	struct lttcomm_relayd_close_trace_chunk {
	316	uint64_t chunk_id;
	317	/* Seconds since EPOCH. */
	318	uint64_t close_timestamp;
	319	/* enum lttng_trace_chunk_command_type */
	320	LTTNG_OPTIONAL_COMM(uint32_t) LTTNG_PACKED close_command;
	321	} LTTNG_PACKED;
	322
	323	struct lttcomm_relayd_close_trace_chunk_reply {
	324	struct lttcomm_relayd_generic_reply generic;
	325	/* Includes trailing NULL. */
	326	uint32_t path_length;
	327	char path[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
	328	} LTTNG_PACKED;
	329
	330	struct lttcomm_relayd_trace_chunk_exists {
	331	uint64_t chunk_id;
	332	} LTTNG_PACKED;
	333
	334	struct lttcomm_relayd_trace_chunk_exists_reply {
	335	struct lttcomm_relayd_generic_reply generic;
	336	uint8_t trace_chunk_exists;
	337	} LTTNG_PACKED;
	338
	339	enum lttcomm_relayd_configuration_flag {
	340	/* The relay daemon (2.12) is configured to allow clear operations. */
	341	LTTCOMM_RELAYD_CONFIGURATION_FLAG_CLEAR_ALLOWED = (1 << 0),
	342	};
	343
	344	struct lttcomm_relayd_get_configuration {
	345	uint64_t query_flags;
	346	} LTTNG_PACKED;
	347
	348	/*
	349	* Used to return a relay daemon's configuration in reply to the
	350	* RELAYD_GET_CONFIGURATION command.
	351	*/
	352	struct lttcomm_relayd_get_configuration_reply {
	353	struct lttcomm_relayd_generic_reply generic;
	354	/* Set of lttcomm_relayd_configuration_flag. */
	355	uint64_t relayd_configuration_flags;
	356	/* Optional variable-length payload. */
	357	char payload[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
	358	} LTTNG_PACKED;
	359
	360	#endif /* _RELAYD_COMM */