518dd4c0d9
reordering won't make the actual write to be committed before marking the coresponding extent as dirty. It can be disabled in configuration file. If BIO_FLUSH is not supported by the underlying file system we log a warning and never send BIO_FLUSH again to that GEOM provider. MFC after: 3 days
246 lines
7.0 KiB
C
246 lines
7.0 KiB
C
/*-
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* Copyright (c) 2009-2010 The FreeBSD Foundation
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* Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>
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* All rights reserved.
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*
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* This software was developed by Pawel Jakub Dawidek under sponsorship from
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* the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _HAST_H_
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#define _HAST_H_
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#include <sys/queue.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <limits.h>
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#include <pthread.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <activemap.h>
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#include "proto.h"
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/*
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* Version history:
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* 0 - initial version
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* 1 - HIO_KEEPALIVE added
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*/
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#define HAST_PROTO_VERSION 1
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#define EHAST_OK 0
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#define EHAST_NOENTRY 1
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#define EHAST_INVALID 2
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#define EHAST_NOMEMORY 3
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#define EHAST_UNIMPLEMENTED 4
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#define HASTCTL_CMD_UNKNOWN 0
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#define HASTCTL_CMD_SETROLE 1
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#define HASTCTL_CMD_STATUS 2
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#define HAST_ROLE_UNDEF 0
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#define HAST_ROLE_INIT 1
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#define HAST_ROLE_PRIMARY 2
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#define HAST_ROLE_SECONDARY 3
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#define HAST_SYNCSRC_UNDEF 0
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#define HAST_SYNCSRC_PRIMARY 1
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#define HAST_SYNCSRC_SECONDARY 2
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#define HIO_UNDEF 0
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#define HIO_READ 1
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#define HIO_WRITE 2
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#define HIO_DELETE 3
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#define HIO_FLUSH 4
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#define HIO_KEEPALIVE 5
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#define HAST_USER "hast"
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#define HAST_TIMEOUT 20
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#define HAST_CONFIG "/etc/hast.conf"
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#define HAST_CONTROL "/var/run/hastctl"
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#define HASTD_LISTEN_TCP4 "tcp4://0.0.0.0:8457"
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#define HASTD_LISTEN_TCP6 "tcp6://[::]:8457"
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#define HASTD_PIDFILE "/var/run/hastd.pid"
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/* Default extent size. */
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#define HAST_EXTENTSIZE 2097152
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/* Default maximum number of extents that are kept dirty. */
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#define HAST_KEEPDIRTY 64
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#define HAST_ADDRSIZE 1024
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#define HAST_TOKEN_SIZE 16
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/* Number of seconds to sleep between reconnect retries or keepalive packets. */
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#define HAST_KEEPALIVE 10
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struct hastd_listen {
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/* Address to listen on. */
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char hl_addr[HAST_ADDRSIZE];
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/* Protocol-specific data. */
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struct proto_conn *hl_conn;
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TAILQ_ENTRY(hastd_listen) hl_next;
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};
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struct hastd_config {
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/* Address to communicate with hastctl(8). */
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char hc_controladdr[HAST_ADDRSIZE];
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/* Protocol-specific data. */
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struct proto_conn *hc_controlconn;
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/* Incoming control connection. */
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struct proto_conn *hc_controlin;
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/* List of addresses to listen on. */
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TAILQ_HEAD(, hastd_listen) hc_listen;
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/* List of resources. */
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TAILQ_HEAD(, hast_resource) hc_resources;
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};
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#define HAST_REPLICATION_FULLSYNC 0
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#define HAST_REPLICATION_MEMSYNC 1
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#define HAST_REPLICATION_ASYNC 2
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#define HAST_COMPRESSION_NONE 0
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#define HAST_COMPRESSION_HOLE 1
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#define HAST_COMPRESSION_LZF 2
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#define HAST_CHECKSUM_NONE 0
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#define HAST_CHECKSUM_CRC32 1
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#define HAST_CHECKSUM_SHA256 2
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/*
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* Structure that describes single resource.
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*/
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struct hast_resource {
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/* Resource name. */
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char hr_name[NAME_MAX];
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/* Replication mode (HAST_REPLICATION_*). */
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int hr_replication;
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/* Provider name that will appear in /dev/hast/. */
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char hr_provname[NAME_MAX];
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/* Synchronization extent size. */
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int hr_extentsize;
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/* Maximum number of extents that are kept dirty. */
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int hr_keepdirty;
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/* Path to a program to execute on various events. */
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char hr_exec[PATH_MAX];
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/* Compression algorithm. */
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int hr_compression;
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/* Checksum algorithm. */
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int hr_checksum;
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/* Path to local component. */
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char hr_localpath[PATH_MAX];
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/* Descriptor to access local component. */
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int hr_localfd;
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/* Offset into local component. */
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off_t hr_localoff;
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/* Size of usable space. */
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off_t hr_datasize;
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/* Size of entire local provider. */
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off_t hr_local_mediasize;
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/* Sector size of local provider. */
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unsigned int hr_local_sectorsize;
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/* Flush write cache on metadata updates? */
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int hr_metaflush;
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/* Descriptor for /dev/ggctl communication. */
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int hr_ggatefd;
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/* Unit number for ggate communication. */
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int hr_ggateunit;
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/* Address of the remote component. */
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char hr_remoteaddr[HAST_ADDRSIZE];
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/* Local address to bind to for outgoing connections. */
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char hr_sourceaddr[HAST_ADDRSIZE];
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/* Connection for incoming data. */
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struct proto_conn *hr_remotein;
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/* Connection for outgoing data. */
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struct proto_conn *hr_remoteout;
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/* Token to verify both in and out connection are coming from
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the same node (not necessarily from the same address). */
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unsigned char hr_token[HAST_TOKEN_SIZE];
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/* Connection timeout. */
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int hr_timeout;
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/* Resource unique identifier. */
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uint64_t hr_resuid;
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/* Primary's local modification count. */
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uint64_t hr_primary_localcnt;
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/* Primary's remote modification count. */
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uint64_t hr_primary_remotecnt;
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/* Secondary's local modification count. */
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uint64_t hr_secondary_localcnt;
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/* Secondary's remote modification count. */
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uint64_t hr_secondary_remotecnt;
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/* Synchronization source. */
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uint8_t hr_syncsrc;
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/* Resource role: HAST_ROLE_{INIT,PRIMARY,SECONDARY}. */
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int hr_role;
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/* Previous resource role: HAST_ROLE_{INIT,PRIMARY,SECONDARY}. */
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int hr_previous_role;
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/* PID of child worker process. 0 - no child. */
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pid_t hr_workerpid;
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/* Control commands from parent to child. */
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struct proto_conn *hr_ctrl;
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/* Events from child to parent. */
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struct proto_conn *hr_event;
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/* Connection requests from child to parent. */
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struct proto_conn *hr_conn;
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/* Activemap structure. */
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struct activemap *hr_amp;
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/* Locked used to synchronize access to hr_amp. */
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pthread_mutex_t hr_amp_lock;
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/* Number of BIO_READ requests. */
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uint64_t hr_stat_read;
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/* Number of BIO_WRITE requests. */
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uint64_t hr_stat_write;
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/* Number of BIO_DELETE requests. */
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uint64_t hr_stat_delete;
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/* Number of BIO_FLUSH requests. */
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uint64_t hr_stat_flush;
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/* Number of activemap updates. */
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uint64_t hr_stat_activemap_update;
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/* Next resource. */
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TAILQ_ENTRY(hast_resource) hr_next;
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};
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struct hastd_config *yy_config_parse(const char *config, bool exitonerror);
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void yy_config_free(struct hastd_config *config);
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void yyerror(const char *);
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int yylex(void);
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int yyparse(void);
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#endif /* !_HAST_H_ */
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