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

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

#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
b8aa1682	1	/*
ab5be9fa MJ	2	* Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
ab5be9fa MJ	3	* Copyright (C) 2012 Julien Desfossez <julien.desfossez@efficios.com>
b8aa1682	4	*
ab5be9fa	5	* SPDX-License-Identifier: GPL-2.0-only
b8aa1682	6	*
b8aa1682 JD	7	*/
	8
	9	#ifndef _RELAYD_COMM
	10	#define _RELAYD_COMM
	11
b8aa1682 JD	12	#include <limits.h>
	13	#include <stdint.h>
	14
	15	#include <lttng/lttng.h>
40ebe219	16	#include <common/compiler.hpp>
c9e313bc SM	17	#include <common/defaults.hpp>
	18	#include <common/index/ctf-index.hpp>
	19	#include <common/macros.hpp>
	20	#include <common/uuid.hpp>
	21	#include <common/optional.hpp>
b8aa1682	22
6947778e MD	23	#define RELAYD_VERSION_COMM_MAJOR VERSION_MAJOR
6947778e MD	24	#define RELAYD_VERSION_COMM_MINOR VERSION_MINOR
0a6b5085	25
1c17e424 JR	26	#define RELAYD_COMM_LTTNG_HOST_NAME_MAX_2_4 64
	27	#define RELAYD_COMM_LTTNG_NAME_MAX_2_4 255
	28	#define RELAYD_COMM_LTTNG_PATH_MAX 4096
	29	#define RELAYD_COMM_DEFAULT_STREAM_NAME_LEN 264 /* 256 + 8 */
	30
b8aa1682 JD	31	/*
	32	* lttng-relayd communication header.
	33	*/
	34	struct lttcomm_relayd_hdr {
	35	/* Circuit ID not used for now so always ignored */
	36	uint64_t circuit_id;
	37	uint64_t data_size; /* data size following this header */
7c9534d6	38	uint32_t cmd; /* enum lttcomm_relayd_command */
b8aa1682	39	uint32_t cmd_version; /* command version */
a9e87764	40	} LTTNG_PACKED;
b8aa1682 JD	41
	42	/*
	43	* lttng-relayd data header.
	44	*/
	45	struct lttcomm_relayd_data_hdr {
	46	/* Circuit ID not used for now so always ignored */
	47	uint64_t circuit_id;
	48	uint64_t stream_id; /* Stream ID known by the relayd */
173af62f	49	uint64_t net_seq_num; /* Network sequence number, per stream. */
b8aa1682	50	uint32_t data_size; /* data size following this header */
1d4dfdef	51	uint32_t padding_size; /* Size of 0 padding the data */
a9e87764	52	} LTTNG_PACKED;
b8aa1682	53
c5b6f4f0 DG	54	/*
	55	* Reply from a create session command.
	56	*/
	57	struct lttcomm_relayd_status_session {
	58	uint64_t session_id;
	59	uint32_t ret_code;
a9e87764	60	} LTTNG_PACKED;
c5b6f4f0	61
b8aa1682 JD	62	/*
	63	* Used to add a stream on the relay daemon.
	64	*/
	65	struct lttcomm_relayd_add_stream {
1c17e424 JR	66	char channel_name[RELAYD_COMM_DEFAULT_STREAM_NAME_LEN];
1c17e424 JR	67	char pathname[RELAYD_COMM_LTTNG_PATH_MAX];
a9e87764	68	} LTTNG_PACKED;
b8aa1682	69
0f907de1 JD	70	/*
	71	* Used to add a stream on the relay daemon.
	72	* Protocol version 2.2
	73	*/
	74	struct lttcomm_relayd_add_stream_2_2 {
1c17e424 JR	75	char channel_name[RELAYD_COMM_DEFAULT_STREAM_NAME_LEN];
1c17e424 JR	76	char pathname[RELAYD_COMM_LTTNG_PATH_MAX];
0f907de1 JD	77	uint64_t tracefile_size;
	78	uint64_t tracefile_count;
	79	} LTTNG_PACKED;
	80
2f21a469 JR	81	struct lttcomm_relayd_add_stream_2_11 {
	82	uint32_t channel_name_len;
	83	uint32_t pathname_len;
	84	uint64_t tracefile_size;
	85	uint64_t tracefile_count;
348a81dc	86	uint64_t trace_chunk_id;
40ebe219	87	char names[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
2f21a469 JR	88	} LTTNG_PACKED;
2f21a469 JR	89
b8aa1682 JD	90	/*
	91	* Answer from an add stream command.
	92	*/
	93	struct lttcomm_relayd_status_stream {
	94	uint64_t handle;
	95	uint32_t ret_code;
a9e87764	96	} LTTNG_PACKED;
b8aa1682 JD	97
	98	/*
	99	* Used to return command code for command not needing special data.
	100	*/
	101	struct lttcomm_relayd_generic_reply {
	102	uint32_t ret_code;
a9e87764	103	} LTTNG_PACKED;
b8aa1682	104
b8aa1682 JD	105	/*
	106	* Version command.
	107	*/
	108	struct lttcomm_relayd_version {
	109	uint32_t major;
	110	uint32_t minor;
a9e87764	111	} LTTNG_PACKED;
b8aa1682 JD	112
	113	/*
	114	* Metadata payload used when metadata command is sent.
	115	*/
	116	struct lttcomm_relayd_metadata_payload {
	117	uint64_t stream_id;
1d4dfdef	118	uint32_t padding_size;
b8aa1682	119	char payload[];
a9e87764	120	} LTTNG_PACKED;
b8aa1682	121
173af62f DG	122	/*
	123	* Used to indicate that a specific stream id can now be closed.
	124	*/
	125	struct lttcomm_relayd_close_stream {
	126	uint64_t stream_id;
	127	uint64_t last_net_seq_num; /* sequence number of last packet */
a9e87764	128	} LTTNG_PACKED;
173af62f	129
c8f59ee5	130	/*
6d805429 DG	131	* Used to test if for a given stream id the data is pending on the relayd side
6d805429 DG	132	* for reading.
c8f59ee5	133	*/
6d805429	134	struct lttcomm_relayd_data_pending {
c8f59ee5 DG	135	uint64_t stream_id;
c8f59ee5 DG	136	uint64_t last_net_seq_num; /* Sequence number of the last packet */
a9e87764	137	} LTTNG_PACKED;
c8f59ee5	138
f7079f67 DG	139	struct lttcomm_relayd_begin_data_pending {
f7079f67 DG	140	uint64_t session_id;
a9e87764	141	} LTTNG_PACKED;
f7079f67 DG	142
	143	struct lttcomm_relayd_end_data_pending {
	144	uint64_t session_id;
a9e87764	145	} LTTNG_PACKED;
f7079f67	146
ad7051c0 DG	147	struct lttcomm_relayd_quiescent_control {
	148	uint64_t stream_id;
	149	} LTTNG_PACKED;
	150
1c20f0e2 JD	151	/*
	152	* Index data.
	153	*/
	154	struct lttcomm_relayd_index {
	155	uint64_t relay_stream_id;
	156	uint64_t net_seq_num;
	157	uint64_t packet_size;
	158	uint64_t content_size;
	159	uint64_t timestamp_begin;
	160	uint64_t timestamp_end;
	161	uint64_t events_discarded;
	162	uint64_t stream_id;
f8f3885c	163	/* 2.8+ */
234cd636 JD	164	uint64_t stream_instance_id;
234cd636 JD	165	uint64_t packet_seq_num;
1c20f0e2 JD	166	} LTTNG_PACKED;
1c20f0e2 JD	167
f8f3885c MD	168	static inline size_t lttcomm_relayd_index_len(uint32_t major, uint32_t minor)
	169	{
	170	if (major == 1) {
	171	switch (minor) {
	172	case 0:
	173	return offsetof(struct lttcomm_relayd_index, stream_id)
	174	+ member_sizeof(struct lttcomm_relayd_index,
	175	stream_id);
	176	case 1:
	177	return offsetof(struct lttcomm_relayd_index, packet_seq_num)
	178	+ member_sizeof(struct lttcomm_relayd_index,
	179	packet_seq_num);
	180	default:
	181	abort();
	182	}
	183	}
	184	abort();
	185	}
	186
d3e2ba59 JD	187	/*
	188	* Create session in 2.4 adds additionnal parameters for live reading.
	189	*/
	190	struct lttcomm_relayd_create_session_2_4 {
1c17e424 JR	191	char session_name[RELAYD_COMM_LTTNG_NAME_MAX_2_4];
1c17e424 JR	192	char hostname[RELAYD_COMM_LTTNG_HOST_NAME_MAX_2_4];
d3e2ba59	193	uint32_t live_timer;
7d2f7452	194	uint32_t snapshot;
d3e2ba59 JD	195	} LTTNG_PACKED;
d3e2ba59 JD	196
f86f6389 JR	197	struct lttcomm_relayd_create_session_2_11 {
	198	uint32_t session_name_len;
	199	uint32_t hostname_len;
6fa5fe7c MD	200	/* Optional, set to 0 to indicate it is not user-specified. */
6fa5fe7c MD	201	uint32_t base_path_len;
f86f6389 JR	202	uint32_t live_timer;
f86f6389 JR	203	uint8_t snapshot;
46ef2188	204	uint8_t session_name_contains_creation_time;
658f12fa	205	/* Sessiond instance UUID */
328c2fe7	206	uint8_t sessiond_uuid[LTTNG_UUID_LEN];
658f12fa	207	/* Sessiond session id */
d3219302	208	uint64_t session_id;
db1da059 JG	209	/* Session creation time, in seconds since UNIX Epoch. */
	210	uint64_t creation_time;
	211	LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED current_chunk_id;
6fa5fe7c	212	/* Contains the session_name, hostname, base_path. */
40ebe219	213	char names[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
f86f6389 JR	214	} LTTNG_PACKED;
f86f6389 JR	215
ecd1a12f MD	216	struct lttcomm_relayd_create_session_reply_2_11 {
	217	struct lttcomm_relayd_status_session generic;
	218	/* Includes the '\0' terminator. */
	219	uint32_t output_path_length;
40ebe219	220	char output_path[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
ecd1a12f MD	221	} LTTNG_PACKED;
ecd1a12f MD	222
93ec662e JD	223	/*
	224	* Used to ask the relay to reset the metadata trace file (regeneration).
	225	* Send the new version of the metadata (starts at 0).
	226	*/
	227	struct lttcomm_relayd_reset_metadata {
	228	uint64_t stream_id;
	229	uint64_t version;
	230	} LTTNG_PACKED;
	231
c35f9726	232	struct lttcomm_relayd_stream_rotation_position {
d3ecc550	233	uint64_t stream_id;
c35f9726 JG	234	/*
	235	* Sequence number of the first packet belonging to the new
	236	* "destination" trace chunk to which the stream is rotating.
	237	*
	238	* Ignored for metadata streams.
	239	*/
d3ecc550	240	uint64_t rotate_at_seq_num;
c35f9726 JG	241	} LTTNG_PACKED;
c35f9726 JG	242
ce9dbd47 JG	243	/*
	244	* For certain releases, the LTTNG_PACKED annotation was missing on the
	245	* `new_chunk_id` field which causes padding to be added between the
	246	* "optional" structure's `is_set` and `value` fields.
	247	*
	248	* Three alignment cases are handled:
	249	* - `value` is aligned to the next byte boundary after `is_set`
	250	* no padding is produced, see
	251	* `struct lttcomm_relayd_rotate_streams_packed`,
	252	* - `value` is aligned to the next 4-byte boundary after `is_set`
	253	* (e.g. x86), 3 bytes of padding are produced, see
	254	* `struct lttcomm_relayd_rotate_streams_3_bytes_padding`,
	255	* - `value` is aligned to the next 8-byte boundary after `is_set`
	256	* (e.g. x86-64), 7 bytes of padding are produced, see
	257	* `struct lttcomm_relayd_rotate_streams_7_bytes_padding`.
	258	*
	259	* Note that since this structure's advertised size is used to determine
	260	* the size of the padding it includes, it can't be extended with new
	261	* optional fields. A new command would be needed.
	262	*/
c35f9726 JG	263	struct lttcomm_relayd_rotate_streams {
	264	uint32_t stream_count;
	265	/*
	266	* Streams can be rotated outside of a chunk but not be parented to
	267	* a new chunk.
ce9dbd47 JG	268	*
	269	* Improperly packed, but left as-is for backwards compatibility
	270	* with unpatched relay daemons.
c35f9726 JG	271	*/
	272	LTTNG_OPTIONAL_COMM(uint64_t) new_chunk_id;
	273	/* `stream_count` positions follow. */
	274	struct lttcomm_relayd_stream_rotation_position rotation_positions[];
d3ecc550 JD	275	} LTTNG_PACKED;
d3ecc550 JD	276
ce9dbd47 JG	277	struct lttcomm_relayd_rotate_streams_packed {
	278	uint32_t stream_count;
	279	LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED new_chunk_id;
	280	struct lttcomm_relayd_stream_rotation_position rotation_positions[];
	281	} LTTNG_PACKED;
	282
	283	struct lttcomm_relayd_rotate_streams_3_bytes_padding {
	284	uint32_t stream_count;
	285	struct {
	286	union {
	287	uint8_t is_set;
	288	uint32_t padding;
	289	};
	290	uint64_t value;
	291	} LTTNG_PACKED new_chunk_id;
	292	struct lttcomm_relayd_stream_rotation_position rotation_positions[];
	293	} LTTNG_PACKED;
	294
	295	struct lttcomm_relayd_rotate_streams_7_bytes_padding {
	296	uint32_t stream_count;
	297	struct {
	298	union {
	299	uint8_t is_set;
	300	uint64_t padding;
	301	};
	302	uint64_t value;
	303	} LTTNG_PACKED new_chunk_id;
	304	struct lttcomm_relayd_stream_rotation_position rotation_positions[];
	305	} LTTNG_PACKED;
	306
e5add6d0 JG	307	struct lttcomm_relayd_create_trace_chunk {
	308	uint64_t chunk_id;
	309	/* Seconds since EPOCH. */
	310	uint64_t creation_timestamp;
	311	/* Includes trailing NULL. */
	312	uint32_t override_name_length;
40ebe219	313	char override_name[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
e5add6d0 JG	314	} LTTNG_PACKED;
e5add6d0 JG	315
bbc4768c JG	316	struct lttcomm_relayd_close_trace_chunk {
	317	uint64_t chunk_id;
	318	/* Seconds since EPOCH. */
	319	uint64_t close_timestamp;
	320	/* enum lttng_trace_chunk_command_type */
	321	LTTNG_OPTIONAL_COMM(uint32_t) LTTNG_PACKED close_command;
	322	} LTTNG_PACKED;
	323
ecd1a12f MD	324	struct lttcomm_relayd_close_trace_chunk_reply {
	325	struct lttcomm_relayd_generic_reply generic;
	326	/* Includes trailing NULL. */
	327	uint32_t path_length;
40ebe219	328	char path[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
ecd1a12f MD	329	} LTTNG_PACKED;
ecd1a12f MD	330
c35f9726 JG	331	struct lttcomm_relayd_trace_chunk_exists {
	332	uint64_t chunk_id;
	333	} LTTNG_PACKED;
	334
	335	struct lttcomm_relayd_trace_chunk_exists_reply {
	336	struct lttcomm_relayd_generic_reply generic;
	337	uint8_t trace_chunk_exists;
	338	} LTTNG_PACKED;
	339
8614e600 MD	340	enum lttcomm_relayd_configuration_flag {
	341	/* The relay daemon (2.12) is configured to allow clear operations. */
	342	LTTCOMM_RELAYD_CONFIGURATION_FLAG_CLEAR_ALLOWED = (1 << 0),
	343	};
	344
	345	struct lttcomm_relayd_get_configuration {
	346	uint64_t query_flags;
	347	} LTTNG_PACKED;
	348
	349	/*
	350	* Used to return a relay daemon's configuration in reply to the
	351	* RELAYD_GET_CONFIGURATION command.
	352	*/
	353	struct lttcomm_relayd_get_configuration_reply {
	354	struct lttcomm_relayd_generic_reply generic;
	355	/* Set of lttcomm_relayd_configuration_flag. */
	356	uint64_t relayd_configuration_flags;
	357	/* Optional variable-length payload. */
40ebe219	358	char payload[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
8614e600 MD	359	} LTTNG_PACKED;
8614e600 MD	360
b8aa1682	361	#endif /* _RELAYD_COMM */