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

/*
 * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
 *                      Julien Desfossez <julien.desfossez@efficios.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2 only,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef _RELAYD_COMM
#define _RELAYD_COMM

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

#include <lttng/lttng.h>
#include <common/defaults.h>
#include <common/index/ctf-index.h>
#include <common/macros.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_archive_id;
	char names[];
} 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;
	uint32_t live_timer;
	uint8_t snapshot;
	/* Contains the session_name and hostname */
	char names[];
} 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_rotate_stream {
	uint64_t stream_id;
	/* Ignored for metadata streams. */
	uint64_t rotate_at_seq_num;
	uint64_t new_chunk_id;
	/* Includes trailing NULL. */
	uint32_t pathname_length;
	/* Must be the last member of this structure. */
	char new_pathname[];
} LTTNG_PACKED;

struct lttcomm_relayd_rotate_rename {
	uint32_t old_path_length;
	uint32_t new_path_length;
	/* Concatenation of the old and new paths, separated by \0. */
	char paths[];
} LTTNG_PACKED;

struct lttcomm_relayd_rotate_pending {
	uint64_t chunk_id;
} LTTNG_PACKED;

struct lttcomm_relayd_rotate_pending_reply {
	struct lttcomm_relayd_generic_reply generic;
	/* Valid values are [0, 1]. */
	uint8_t is_pending;
} LTTNG_PACKED;

struct lttcomm_relayd_mkdir {
	/* Includes trailing NULL */
	uint32_t length;
	char path[];
} LTTNG_PACKED;

#endif	/* _RELAYD_COMM */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
	3	* Julien Desfossez <julien.desfossez@efficios.com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License, version 2 only,
	7	* as published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along
	15	* with this program; if not, write to the Free Software Foundation, Inc.,
	16	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	17	*/
	18
	19	#ifndef _RELAYD_COMM
	20	#define _RELAYD_COMM
	21
	22	#include <limits.h>
	23	#include <stdint.h>
	24
	25	#include <lttng/lttng.h>
	26	#include <common/defaults.h>
	27	#include <common/index/ctf-index.h>
	28	#include <common/macros.h>
	29
	30	#define RELAYD_VERSION_COMM_MAJOR VERSION_MAJOR
	31	#define RELAYD_VERSION_COMM_MINOR VERSION_MINOR
	32
	33	#define RELAYD_COMM_LTTNG_HOST_NAME_MAX_2_4 64
	34	#define RELAYD_COMM_LTTNG_NAME_MAX_2_4 255
	35	#define RELAYD_COMM_LTTNG_PATH_MAX 4096
	36	#define RELAYD_COMM_DEFAULT_STREAM_NAME_LEN 264 /* 256 + 8 */
	37
	38	/*
	39	* lttng-relayd communication header.
	40	*/
	41	struct lttcomm_relayd_hdr {
	42	/* Circuit ID not used for now so always ignored */
	43	uint64_t circuit_id;
	44	uint64_t data_size; /* data size following this header */
	45	uint32_t cmd; /* enum lttcomm_relayd_command */
	46	uint32_t cmd_version; /* command version */
	47	} LTTNG_PACKED;
	48
	49	/*
	50	* lttng-relayd data header.
	51	*/
	52	struct lttcomm_relayd_data_hdr {
	53	/* Circuit ID not used for now so always ignored */
	54	uint64_t circuit_id;
	55	uint64_t stream_id; /* Stream ID known by the relayd */
	56	uint64_t net_seq_num; /* Network sequence number, per stream. */
	57	uint32_t data_size; /* data size following this header */
	58	uint32_t padding_size; /* Size of 0 padding the data */
	59	} LTTNG_PACKED;
	60
	61	/*
	62	* Reply from a create session command.
	63	*/
	64	struct lttcomm_relayd_status_session {
	65	uint64_t session_id;
	66	uint32_t ret_code;
	67	} LTTNG_PACKED;
	68
	69	/*
	70	* Used to add a stream on the relay daemon.
	71	*/
	72	struct lttcomm_relayd_add_stream {
	73	char channel_name[RELAYD_COMM_DEFAULT_STREAM_NAME_LEN];
	74	char pathname[RELAYD_COMM_LTTNG_PATH_MAX];
	75	} LTTNG_PACKED;
	76
	77	/*
	78	* Used to add a stream on the relay daemon.
	79	* Protocol version 2.2
	80	*/
	81	struct lttcomm_relayd_add_stream_2_2 {
	82	char channel_name[RELAYD_COMM_DEFAULT_STREAM_NAME_LEN];
	83	char pathname[RELAYD_COMM_LTTNG_PATH_MAX];
	84	uint64_t tracefile_size;
	85	uint64_t tracefile_count;
	86	} LTTNG_PACKED;
	87
	88	struct lttcomm_relayd_add_stream_2_11 {
	89	uint32_t channel_name_len;
	90	uint32_t pathname_len;
	91	uint64_t tracefile_size;
	92	uint64_t tracefile_count;
	93	uint64_t trace_archive_id;
	94	char names[];
	95	} LTTNG_PACKED;
	96
	97	/*
	98	* Answer from an add stream command.
	99	*/
	100	struct lttcomm_relayd_status_stream {
	101	uint64_t handle;
	102	uint32_t ret_code;
	103	} LTTNG_PACKED;
	104
	105	/*
	106	* Used to return command code for command not needing special data.
	107	*/
	108	struct lttcomm_relayd_generic_reply {
	109	uint32_t ret_code;
	110	} LTTNG_PACKED;
	111
	112	/*
	113	* Version command.
	114	*/
	115	struct lttcomm_relayd_version {
	116	uint32_t major;
	117	uint32_t minor;
	118	} LTTNG_PACKED;
	119
	120	/*
	121	* Metadata payload used when metadata command is sent.
	122	*/
	123	struct lttcomm_relayd_metadata_payload {
	124	uint64_t stream_id;
	125	uint32_t padding_size;
	126	char payload[];
	127	} LTTNG_PACKED;
	128
	129	/*
	130	* Used to indicate that a specific stream id can now be closed.
	131	*/
	132	struct lttcomm_relayd_close_stream {
	133	uint64_t stream_id;
	134	uint64_t last_net_seq_num; /* sequence number of last packet */
	135	} LTTNG_PACKED;
	136
	137	/*
	138	* Used to test if for a given stream id the data is pending on the relayd side
	139	* for reading.
	140	*/
	141	struct lttcomm_relayd_data_pending {
	142	uint64_t stream_id;
	143	uint64_t last_net_seq_num; /* Sequence number of the last packet */
	144	} LTTNG_PACKED;
	145
	146	struct lttcomm_relayd_begin_data_pending {
	147	uint64_t session_id;
	148	} LTTNG_PACKED;
	149
	150	struct lttcomm_relayd_end_data_pending {
	151	uint64_t session_id;
	152	} LTTNG_PACKED;
	153
	154	struct lttcomm_relayd_quiescent_control {
	155	uint64_t stream_id;
	156	} LTTNG_PACKED;
	157
	158	/*
	159	* Index data.
	160	*/
	161	struct lttcomm_relayd_index {
	162	uint64_t relay_stream_id;
	163	uint64_t net_seq_num;
	164	uint64_t packet_size;
	165	uint64_t content_size;
	166	uint64_t timestamp_begin;
	167	uint64_t timestamp_end;
	168	uint64_t events_discarded;
	169	uint64_t stream_id;
	170	/* 2.8+ */
	171	uint64_t stream_instance_id;
	172	uint64_t packet_seq_num;
	173	} LTTNG_PACKED;
	174
	175	static inline size_t lttcomm_relayd_index_len(uint32_t major, uint32_t minor)
	176	{
	177	if (major == 1) {
	178	switch (minor) {
	179	case 0:
	180	return offsetof(struct lttcomm_relayd_index, stream_id)
	181	+ member_sizeof(struct lttcomm_relayd_index,
	182	stream_id);
	183	case 1:
	184	return offsetof(struct lttcomm_relayd_index, packet_seq_num)
	185	+ member_sizeof(struct lttcomm_relayd_index,
	186	packet_seq_num);
	187	default:
	188	abort();
	189	}
	190	}
	191	abort();
	192	}
	193
	194	/*
	195	* Create session in 2.4 adds additionnal parameters for live reading.
	196	*/
	197	struct lttcomm_relayd_create_session_2_4 {
	198	char session_name[RELAYD_COMM_LTTNG_NAME_MAX_2_4];
	199	char hostname[RELAYD_COMM_LTTNG_HOST_NAME_MAX_2_4];
	200	uint32_t live_timer;
	201	uint32_t snapshot;
	202	} LTTNG_PACKED;
	203
	204	struct lttcomm_relayd_create_session_2_11 {
	205	uint32_t session_name_len;
	206	uint32_t hostname_len;
	207	uint32_t live_timer;
	208	uint8_t snapshot;
	209	/* Contains the session_name and hostname */
	210	char names[];
	211	} LTTNG_PACKED;
	212
	213	/*
	214	* Used to ask the relay to reset the metadata trace file (regeneration).
	215	* Send the new version of the metadata (starts at 0).
	216	*/
	217	struct lttcomm_relayd_reset_metadata {
	218	uint64_t stream_id;
	219	uint64_t version;
	220	} LTTNG_PACKED;
	221
	222	struct lttcomm_relayd_rotate_stream {
	223	uint64_t stream_id;
	224	/* Ignored for metadata streams. */
	225	uint64_t rotate_at_seq_num;
	226	uint64_t new_chunk_id;
	227	/* Includes trailing NULL. */
	228	uint32_t pathname_length;
	229	/* Must be the last member of this structure. */
	230	char new_pathname[];
	231	} LTTNG_PACKED;
	232
	233	struct lttcomm_relayd_rotate_rename {
	234	uint32_t old_path_length;
	235	uint32_t new_path_length;
	236	/* Concatenation of the old and new paths, separated by \0. */
	237	char paths[];
	238	} LTTNG_PACKED;
	239
	240	struct lttcomm_relayd_rotate_pending {
	241	uint64_t chunk_id;
	242	} LTTNG_PACKED;
	243
	244	struct lttcomm_relayd_rotate_pending_reply {
	245	struct lttcomm_relayd_generic_reply generic;
	246	/* Valid values are [0, 1]. */
	247	uint8_t is_pending;
	248	} LTTNG_PACKED;
	249
	250	struct lttcomm_relayd_mkdir {
	251	/* Includes trailing NULL */
	252	uint32_t length;
	253	char path[];
	254	} LTTNG_PACKED;
	255
	256	#endif /* _RELAYD_COMM */