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/*-
* Copyright (c) 2009-2010 The FreeBSD Foundation
* Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>
* All rights reserved.
*
* This software was developed by Pawel Jakub Dawidek under sponsorship from
* the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _HAST_H_
#define _HAST_H_
#include <sys/queue.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <limits.h>
#include <pthread.h>
#include <stdbool.h>
#include <stdint.h>
#include <activemap.h>
#include "proto.h"
/*
* Version history:
* 0 - initial version
* 1 - HIO_KEEPALIVE added
* 2 - "memsync" and "received" attributes added for memsync mode
*/
#define HAST_PROTO_VERSION 2
#define EHAST_OK 0
#define EHAST_NOENTRY 1
#define EHAST_INVALID 2
#define EHAST_NOMEMORY 3
#define EHAST_UNIMPLEMENTED 4
#define HASTCTL_CMD_UNKNOWN 0
#define HASTCTL_CMD_SETROLE 1
#define HASTCTL_CMD_STATUS 2
#define HAST_ROLE_UNDEF 0
#define HAST_ROLE_INIT 1
#define HAST_ROLE_PRIMARY 2
#define HAST_ROLE_SECONDARY 3
#define HAST_SYNCSRC_UNDEF 0
#define HAST_SYNCSRC_PRIMARY 1
#define HAST_SYNCSRC_SECONDARY 2
#define HIO_UNDEF 0
#define HIO_READ 1
#define HIO_WRITE 2
#define HIO_DELETE 3
#define HIO_FLUSH 4
#define HIO_KEEPALIVE 5
#define HAST_USER "hast"
#define HAST_TIMEOUT 20
#define HAST_CONFIG "/etc/hast.conf"
#define HAST_CONTROL "/var/run/hastctl"
#define HASTD_LISTEN_TCP4 "tcp4://0.0.0.0:8457"
#define HASTD_LISTEN_TCP6 "tcp6://[::]:8457"
#define HASTD_PIDFILE "/var/run/hastd.pid"
/* Default extent size. */
#define HAST_EXTENTSIZE 2097152
/* Default maximum number of extents that are kept dirty. */
#define HAST_KEEPDIRTY 64
#define HAST_ADDRSIZE 1024
#define HAST_TOKEN_SIZE 16
/* Number of seconds to sleep between reconnect retries or keepalive packets. */
#define HAST_KEEPALIVE 10
struct hastd_listen {
/* Address to listen on. */
char hl_addr[HAST_ADDRSIZE];
/* Protocol-specific data. */
struct proto_conn *hl_conn;
TAILQ_ENTRY(hastd_listen) hl_next;
};
struct hastd_config {
/* Address to communicate with hastctl(8). */
char hc_controladdr[HAST_ADDRSIZE];
/* Protocol-specific data. */
struct proto_conn *hc_controlconn;
/* Incoming control connection. */
struct proto_conn *hc_controlin;
/* PID file path. */
char hc_pidfile[PATH_MAX];
/* List of addresses to listen on. */
TAILQ_HEAD(, hastd_listen) hc_listen;
/* List of resources. */
TAILQ_HEAD(, hast_resource) hc_resources;
};
#define HAST_REPLICATION_FULLSYNC 0
#define HAST_REPLICATION_MEMSYNC 1
#define HAST_REPLICATION_ASYNC 2
#define HAST_COMPRESSION_NONE 0
#define HAST_COMPRESSION_HOLE 1
#define HAST_COMPRESSION_LZF 2
#define HAST_CHECKSUM_NONE 0
#define HAST_CHECKSUM_CRC32 1
#define HAST_CHECKSUM_SHA256 2
struct nv;
/*
* Structure that describes single resource.
*/
struct hast_resource {
/* Resource name. */
char hr_name[NAME_MAX];
/* Negotiated replication mode (HAST_REPLICATION_*). */
int hr_replication;
/* Configured replication mode (HAST_REPLICATION_*). */
int hr_original_replication;
/* Provider name that will appear in /dev/hast/. */
char hr_provname[NAME_MAX];
/* Synchronization extent size. */
int hr_extentsize;
/* Maximum number of extents that are kept dirty. */
int hr_keepdirty;
/* Path to a program to execute on various events. */
char hr_exec[PATH_MAX];
/* Compression algorithm. */
int hr_compression;
/* Checksum algorithm. */
int hr_checksum;
/* Protocol version. */
int hr_version;
/* Path to local component. */
char hr_localpath[PATH_MAX];
/* Descriptor to access local component. */
int hr_localfd;
/* Offset into local component. */
off_t hr_localoff;
/* Size of usable space. */
off_t hr_datasize;
/* Size of entire local provider. */
off_t hr_local_mediasize;
/* Sector size of local provider. */
unsigned int hr_local_sectorsize;
/* Is flushing write cache supported by the local provider? */
bool hr_localflush;
/* Flush write cache on metadata updates? */
int hr_metaflush;
/* Descriptor for /dev/ggctl communication. */
int hr_ggatefd;
/* Unit number for ggate communication. */
int hr_ggateunit;
/* Address of the remote component. */
char hr_remoteaddr[HAST_ADDRSIZE];
/* Local address to bind to for outgoing connections. */
char hr_sourceaddr[HAST_ADDRSIZE];
/* Connection for incoming data. */
struct proto_conn *hr_remotein;
/* Connection for outgoing data. */
struct proto_conn *hr_remoteout;
/* Token to verify both in and out connection are coming from
the same node (not necessarily from the same address). */
unsigned char hr_token[HAST_TOKEN_SIZE];
/* Connection timeout. */
int hr_timeout;
/* Resource unique identifier. */
uint64_t hr_resuid;
/* Primary's local modification count. */
uint64_t hr_primary_localcnt;
/* Primary's remote modification count. */
uint64_t hr_primary_remotecnt;
/* Secondary's local modification count. */
uint64_t hr_secondary_localcnt;
/* Secondary's remote modification count. */
uint64_t hr_secondary_remotecnt;
/* Synchronization source. */
uint8_t hr_syncsrc;
/* Resource role: HAST_ROLE_{INIT,PRIMARY,SECONDARY}. */
int hr_role;
/* Previous resource role: HAST_ROLE_{INIT,PRIMARY,SECONDARY}. */
int hr_previous_role;
/* PID of child worker process. 0 - no child. */
pid_t hr_workerpid;
/* Control commands from parent to child. */
struct proto_conn *hr_ctrl;
/* Events from child to parent. */
struct proto_conn *hr_event;
/* Connection requests from child to parent. */
struct proto_conn *hr_conn;
/* Activemap structure. */
struct activemap *hr_amp;
/* Lock used to synchronize access to hr_amp. */
pthread_mutex_t hr_amp_lock;
/* Lock used to synchronize access to hr_amp diskmap. */
pthread_mutex_t hr_amp_diskmap_lock;
/* Number of BIO_READ requests. */
uint64_t hr_stat_read;
/* Number of BIO_WRITE requests. */
uint64_t hr_stat_write;
/* Number of BIO_DELETE requests. */
uint64_t hr_stat_delete;
/* Number of BIO_FLUSH requests. */
uint64_t hr_stat_flush;
/* Number of activemap updates. */
uint64_t hr_stat_activemap_update;
/* Number of local read errors. */
uint64_t hr_stat_read_error;
/* Number of local write errors. */
uint64_t hr_stat_write_error;
/* Number of local delete errors. */
uint64_t hr_stat_delete_error;
/* Number of flush errors. */
uint64_t hr_stat_flush_error;
/* Number of activemap write errors. */
uint64_t hr_stat_activemap_write_error;
/* Number of activemap flush errors. */
uint64_t hr_stat_activemap_flush_error;
/* Function to output worker specific info on control status request. */
void (*output_status_aux)(struct nv *);
/* Next resource. */
TAILQ_ENTRY(hast_resource) hr_next;
};
struct hastd_config *yy_config_parse(const char *config, bool exitonerror);
void yy_config_free(struct hastd_config *config);
#endif /* !_HAST_H_ */
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