secondary, which died between send(2) and recv(2). Do it by adding timeout to recv(2) for primary incoming and outgoing sockets and secondary outgoing socket. Reported by: Mikolaj Golub <to.my.trociny@gmail.com> Tested by: Mikolaj Golub <to.my.trociny@gmail.com> MFC after: 3 days
1800 lines
49 KiB
C
1800 lines
49 KiB
C
/*-
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* Copyright (c) 2009 The FreeBSD Foundation
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/bio.h>
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#include <sys/disk.h>
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#include <sys/refcount.h>
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#include <sys/stat.h>
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#include <geom/gate/g_gate.h>
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#include <assert.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <libgeom.h>
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#include <pthread.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <sysexits.h>
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#include <unistd.h>
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#include <activemap.h>
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#include <nv.h>
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#include <rangelock.h>
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#include "control.h"
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#include "hast.h"
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#include "hast_proto.h"
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#include "hastd.h"
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#include "metadata.h"
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#include "proto.h"
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#include "pjdlog.h"
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#include "subr.h"
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#include "synch.h"
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struct hio {
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/*
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* Number of components we are still waiting for.
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* When this field goes to 0, we can send the request back to the
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* kernel. Each component has to decrease this counter by one
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* even on failure.
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*/
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unsigned int hio_countdown;
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/*
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* Each component has a place to store its own error.
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* Once the request is handled by all components we can decide if the
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* request overall is successful or not.
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*/
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int *hio_errors;
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/*
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* Structure used to comunicate with GEOM Gate class.
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*/
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struct g_gate_ctl_io hio_ggio;
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TAILQ_ENTRY(hio) *hio_next;
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};
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#define hio_free_next hio_next[0]
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#define hio_done_next hio_next[0]
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/*
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* Free list holds unused structures. When free list is empty, we have to wait
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* until some in-progress requests are freed.
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*/
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static TAILQ_HEAD(, hio) hio_free_list;
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static pthread_mutex_t hio_free_list_lock;
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static pthread_cond_t hio_free_list_cond;
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/*
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* There is one send list for every component. One requests is placed on all
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* send lists - each component gets the same request, but each component is
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* responsible for managing his own send list.
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*/
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static TAILQ_HEAD(, hio) *hio_send_list;
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static pthread_mutex_t *hio_send_list_lock;
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static pthread_cond_t *hio_send_list_cond;
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/*
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* There is one recv list for every component, although local components don't
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* use recv lists as local requests are done synchronously.
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*/
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static TAILQ_HEAD(, hio) *hio_recv_list;
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static pthread_mutex_t *hio_recv_list_lock;
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static pthread_cond_t *hio_recv_list_cond;
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/*
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* Request is placed on done list by the slowest component (the one that
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* decreased hio_countdown from 1 to 0).
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*/
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static TAILQ_HEAD(, hio) hio_done_list;
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static pthread_mutex_t hio_done_list_lock;
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static pthread_cond_t hio_done_list_cond;
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/*
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* Structure below are for interaction with sync thread.
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*/
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static bool sync_inprogress;
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static pthread_mutex_t sync_lock;
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static pthread_cond_t sync_cond;
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/*
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* The lock below allows to synchornize access to remote connections.
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*/
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static pthread_rwlock_t *hio_remote_lock;
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static pthread_mutex_t hio_guard_lock;
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static pthread_cond_t hio_guard_cond;
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/*
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* Lock to synchronize metadata updates. Also synchronize access to
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* hr_primary_localcnt and hr_primary_remotecnt fields.
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*/
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static pthread_mutex_t metadata_lock;
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/*
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* Maximum number of outstanding I/O requests.
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*/
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#define HAST_HIO_MAX 256
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/*
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* Number of components. At this point there are only two components: local
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* and remote, but in the future it might be possible to use multiple local
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* and remote components.
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*/
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#define HAST_NCOMPONENTS 2
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/*
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* Number of seconds to sleep before next reconnect try.
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*/
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#define RECONNECT_SLEEP 5
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#define ISCONNECTED(res, no) \
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((res)->hr_remotein != NULL && (res)->hr_remoteout != NULL)
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#define QUEUE_INSERT1(hio, name, ncomp) do { \
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bool _wakeup; \
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\
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mtx_lock(&hio_##name##_list_lock[(ncomp)]); \
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_wakeup = TAILQ_EMPTY(&hio_##name##_list[(ncomp)]); \
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TAILQ_INSERT_TAIL(&hio_##name##_list[(ncomp)], (hio), \
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hio_next[(ncomp)]); \
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mtx_unlock(&hio_##name##_list_lock[ncomp]); \
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if (_wakeup) \
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cv_signal(&hio_##name##_list_cond[(ncomp)]); \
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} while (0)
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#define QUEUE_INSERT2(hio, name) do { \
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bool _wakeup; \
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\
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mtx_lock(&hio_##name##_list_lock); \
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_wakeup = TAILQ_EMPTY(&hio_##name##_list); \
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TAILQ_INSERT_TAIL(&hio_##name##_list, (hio), hio_##name##_next);\
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mtx_unlock(&hio_##name##_list_lock); \
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if (_wakeup) \
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cv_signal(&hio_##name##_list_cond); \
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} while (0)
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#define QUEUE_TAKE1(hio, name, ncomp) do { \
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mtx_lock(&hio_##name##_list_lock[(ncomp)]); \
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while (((hio) = TAILQ_FIRST(&hio_##name##_list[(ncomp)])) == NULL) { \
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cv_wait(&hio_##name##_list_cond[(ncomp)], \
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&hio_##name##_list_lock[(ncomp)]); \
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} \
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TAILQ_REMOVE(&hio_##name##_list[(ncomp)], (hio), \
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hio_next[(ncomp)]); \
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mtx_unlock(&hio_##name##_list_lock[(ncomp)]); \
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} while (0)
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#define QUEUE_TAKE2(hio, name) do { \
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mtx_lock(&hio_##name##_list_lock); \
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while (((hio) = TAILQ_FIRST(&hio_##name##_list)) == NULL) { \
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cv_wait(&hio_##name##_list_cond, \
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&hio_##name##_list_lock); \
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} \
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TAILQ_REMOVE(&hio_##name##_list, (hio), hio_##name##_next); \
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mtx_unlock(&hio_##name##_list_lock); \
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} while (0)
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#define SYNCREQ(hio) do { (hio)->hio_ggio.gctl_unit = -1; } while (0)
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#define ISSYNCREQ(hio) ((hio)->hio_ggio.gctl_unit == -1)
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#define SYNCREQDONE(hio) do { (hio)->hio_ggio.gctl_unit = -2; } while (0)
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#define ISSYNCREQDONE(hio) ((hio)->hio_ggio.gctl_unit == -2)
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static struct hast_resource *gres;
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static pthread_mutex_t range_lock;
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static struct rangelocks *range_regular;
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static bool range_regular_wait;
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static pthread_cond_t range_regular_cond;
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static struct rangelocks *range_sync;
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static bool range_sync_wait;
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static pthread_cond_t range_sync_cond;
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static void *ggate_recv_thread(void *arg);
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static void *local_send_thread(void *arg);
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static void *remote_send_thread(void *arg);
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static void *remote_recv_thread(void *arg);
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static void *ggate_send_thread(void *arg);
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static void *sync_thread(void *arg);
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static void *guard_thread(void *arg);
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static void sighandler(int sig);
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static void
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cleanup(struct hast_resource *res)
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{
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int rerrno;
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/* Remember errno. */
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rerrno = errno;
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/*
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* Close descriptor to /dev/hast/<name>
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* to work-around race in the kernel.
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*/
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close(res->hr_localfd);
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/* Destroy ggate provider if we created one. */
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if (res->hr_ggateunit >= 0) {
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struct g_gate_ctl_destroy ggiod;
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ggiod.gctl_version = G_GATE_VERSION;
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ggiod.gctl_unit = res->hr_ggateunit;
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ggiod.gctl_force = 1;
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if (ioctl(res->hr_ggatefd, G_GATE_CMD_DESTROY, &ggiod) < 0) {
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pjdlog_warning("Unable to destroy hast/%s device",
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res->hr_provname);
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}
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res->hr_ggateunit = -1;
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}
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/* Restore errno. */
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errno = rerrno;
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}
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static void
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primary_exit(int exitcode, const char *fmt, ...)
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{
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va_list ap;
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assert(exitcode != EX_OK);
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va_start(ap, fmt);
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pjdlogv_errno(LOG_ERR, fmt, ap);
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va_end(ap);
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cleanup(gres);
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exit(exitcode);
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}
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static void
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primary_exitx(int exitcode, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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pjdlogv(exitcode == EX_OK ? LOG_INFO : LOG_ERR, fmt, ap);
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va_end(ap);
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cleanup(gres);
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exit(exitcode);
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}
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static int
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hast_activemap_flush(struct hast_resource *res)
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{
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const unsigned char *buf;
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size_t size;
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buf = activemap_bitmap(res->hr_amp, &size);
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assert(buf != NULL);
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assert((size % res->hr_local_sectorsize) == 0);
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if (pwrite(res->hr_localfd, buf, size, METADATA_SIZE) !=
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(ssize_t)size) {
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KEEP_ERRNO(pjdlog_errno(LOG_ERR,
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"Unable to flush activemap to disk"));
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return (-1);
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}
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return (0);
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}
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static void
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init_environment(struct hast_resource *res __unused)
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{
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struct hio *hio;
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unsigned int ii, ncomps;
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/*
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* In the future it might be per-resource value.
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*/
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ncomps = HAST_NCOMPONENTS;
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/*
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* Allocate memory needed by lists.
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*/
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hio_send_list = malloc(sizeof(hio_send_list[0]) * ncomps);
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if (hio_send_list == NULL) {
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primary_exitx(EX_TEMPFAIL,
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"Unable to allocate %zu bytes of memory for send lists.",
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sizeof(hio_send_list[0]) * ncomps);
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}
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hio_send_list_lock = malloc(sizeof(hio_send_list_lock[0]) * ncomps);
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if (hio_send_list_lock == NULL) {
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primary_exitx(EX_TEMPFAIL,
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"Unable to allocate %zu bytes of memory for send list locks.",
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sizeof(hio_send_list_lock[0]) * ncomps);
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}
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hio_send_list_cond = malloc(sizeof(hio_send_list_cond[0]) * ncomps);
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if (hio_send_list_cond == NULL) {
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primary_exitx(EX_TEMPFAIL,
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"Unable to allocate %zu bytes of memory for send list condition variables.",
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sizeof(hio_send_list_cond[0]) * ncomps);
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}
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hio_recv_list = malloc(sizeof(hio_recv_list[0]) * ncomps);
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if (hio_recv_list == NULL) {
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primary_exitx(EX_TEMPFAIL,
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"Unable to allocate %zu bytes of memory for recv lists.",
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sizeof(hio_recv_list[0]) * ncomps);
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}
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hio_recv_list_lock = malloc(sizeof(hio_recv_list_lock[0]) * ncomps);
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if (hio_recv_list_lock == NULL) {
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primary_exitx(EX_TEMPFAIL,
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"Unable to allocate %zu bytes of memory for recv list locks.",
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sizeof(hio_recv_list_lock[0]) * ncomps);
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}
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hio_recv_list_cond = malloc(sizeof(hio_recv_list_cond[0]) * ncomps);
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if (hio_recv_list_cond == NULL) {
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primary_exitx(EX_TEMPFAIL,
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"Unable to allocate %zu bytes of memory for recv list condition variables.",
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sizeof(hio_recv_list_cond[0]) * ncomps);
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}
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hio_remote_lock = malloc(sizeof(hio_remote_lock[0]) * ncomps);
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if (hio_remote_lock == NULL) {
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primary_exitx(EX_TEMPFAIL,
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"Unable to allocate %zu bytes of memory for remote connections locks.",
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sizeof(hio_remote_lock[0]) * ncomps);
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}
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/*
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* Initialize lists, their locks and theirs condition variables.
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*/
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TAILQ_INIT(&hio_free_list);
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mtx_init(&hio_free_list_lock);
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cv_init(&hio_free_list_cond);
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for (ii = 0; ii < HAST_NCOMPONENTS; ii++) {
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TAILQ_INIT(&hio_send_list[ii]);
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mtx_init(&hio_send_list_lock[ii]);
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cv_init(&hio_send_list_cond[ii]);
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TAILQ_INIT(&hio_recv_list[ii]);
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mtx_init(&hio_recv_list_lock[ii]);
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cv_init(&hio_recv_list_cond[ii]);
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rw_init(&hio_remote_lock[ii]);
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}
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TAILQ_INIT(&hio_done_list);
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mtx_init(&hio_done_list_lock);
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cv_init(&hio_done_list_cond);
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mtx_init(&hio_guard_lock);
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cv_init(&hio_guard_cond);
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mtx_init(&metadata_lock);
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/*
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* Allocate requests pool and initialize requests.
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*/
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for (ii = 0; ii < HAST_HIO_MAX; ii++) {
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hio = malloc(sizeof(*hio));
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if (hio == NULL) {
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primary_exitx(EX_TEMPFAIL,
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"Unable to allocate %zu bytes of memory for hio request.",
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sizeof(*hio));
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}
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hio->hio_countdown = 0;
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hio->hio_errors = malloc(sizeof(hio->hio_errors[0]) * ncomps);
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if (hio->hio_errors == NULL) {
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primary_exitx(EX_TEMPFAIL,
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"Unable allocate %zu bytes of memory for hio errors.",
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sizeof(hio->hio_errors[0]) * ncomps);
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}
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hio->hio_next = malloc(sizeof(hio->hio_next[0]) * ncomps);
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if (hio->hio_next == NULL) {
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primary_exitx(EX_TEMPFAIL,
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"Unable allocate %zu bytes of memory for hio_next field.",
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sizeof(hio->hio_next[0]) * ncomps);
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}
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hio->hio_ggio.gctl_version = G_GATE_VERSION;
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hio->hio_ggio.gctl_data = malloc(MAXPHYS);
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if (hio->hio_ggio.gctl_data == NULL) {
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primary_exitx(EX_TEMPFAIL,
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"Unable to allocate %zu bytes of memory for gctl_data.",
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MAXPHYS);
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}
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hio->hio_ggio.gctl_length = MAXPHYS;
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hio->hio_ggio.gctl_error = 0;
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TAILQ_INSERT_HEAD(&hio_free_list, hio, hio_free_next);
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}
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/*
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* Turn on signals handling.
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*/
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signal(SIGINT, sighandler);
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signal(SIGTERM, sighandler);
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}
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static void
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init_local(struct hast_resource *res)
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{
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unsigned char *buf;
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size_t mapsize;
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if (metadata_read(res, true) < 0)
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exit(EX_NOINPUT);
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mtx_init(&res->hr_amp_lock);
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if (activemap_init(&res->hr_amp, res->hr_datasize, res->hr_extentsize,
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res->hr_local_sectorsize, res->hr_keepdirty) < 0) {
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primary_exit(EX_TEMPFAIL, "Unable to create activemap");
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}
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mtx_init(&range_lock);
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cv_init(&range_regular_cond);
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if (rangelock_init(&range_regular) < 0)
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primary_exit(EX_TEMPFAIL, "Unable to create regular range lock");
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cv_init(&range_sync_cond);
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if (rangelock_init(&range_sync) < 0)
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primary_exit(EX_TEMPFAIL, "Unable to create sync range lock");
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mapsize = activemap_ondisk_size(res->hr_amp);
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buf = calloc(1, mapsize);
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if (buf == NULL) {
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primary_exitx(EX_TEMPFAIL,
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"Unable to allocate buffer for activemap.");
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}
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if (pread(res->hr_localfd, buf, mapsize, METADATA_SIZE) !=
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(ssize_t)mapsize) {
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primary_exit(EX_NOINPUT, "Unable to read activemap");
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}
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activemap_copyin(res->hr_amp, buf, mapsize);
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if (res->hr_resuid != 0)
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return;
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/*
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* We're using provider for the first time, so we have to generate
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* resource unique identifier and initialize local and remote counts.
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*/
|
|
arc4random_buf(&res->hr_resuid, sizeof(res->hr_resuid));
|
|
res->hr_primary_localcnt = 1;
|
|
res->hr_primary_remotecnt = 0;
|
|
if (metadata_write(res) < 0)
|
|
exit(EX_NOINPUT);
|
|
}
|
|
|
|
static bool
|
|
init_remote(struct hast_resource *res, struct proto_conn **inp,
|
|
struct proto_conn **outp)
|
|
{
|
|
struct proto_conn *in, *out;
|
|
struct nv *nvout, *nvin;
|
|
const unsigned char *token;
|
|
unsigned char *map;
|
|
const char *errmsg;
|
|
int32_t extentsize;
|
|
int64_t datasize;
|
|
uint32_t mapsize;
|
|
size_t size;
|
|
|
|
assert((inp == NULL && outp == NULL) || (inp != NULL && outp != NULL));
|
|
|
|
in = out = NULL;
|
|
|
|
/* Prepare outgoing connection with remote node. */
|
|
if (proto_client(res->hr_remoteaddr, &out) < 0) {
|
|
primary_exit(EX_TEMPFAIL, "Unable to create connection to %s",
|
|
res->hr_remoteaddr);
|
|
}
|
|
/* Try to connect, but accept failure. */
|
|
if (proto_connect(out) < 0) {
|
|
pjdlog_errno(LOG_WARNING, "Unable to connect to %s",
|
|
res->hr_remoteaddr);
|
|
goto close;
|
|
}
|
|
/* Error in setting timeout is not critical, but why should it fail? */
|
|
if (proto_timeout(out, res->hr_timeout) < 0)
|
|
pjdlog_errno(LOG_WARNING, "Unable to set connection timeout");
|
|
/*
|
|
* First handshake step.
|
|
* Setup outgoing connection with remote node.
|
|
*/
|
|
nvout = nv_alloc();
|
|
nv_add_string(nvout, res->hr_name, "resource");
|
|
if (nv_error(nvout) != 0) {
|
|
pjdlog_common(LOG_WARNING, 0, nv_error(nvout),
|
|
"Unable to allocate header for connection with %s",
|
|
res->hr_remoteaddr);
|
|
nv_free(nvout);
|
|
goto close;
|
|
}
|
|
if (hast_proto_send(res, out, nvout, NULL, 0) < 0) {
|
|
pjdlog_errno(LOG_WARNING,
|
|
"Unable to send handshake header to %s",
|
|
res->hr_remoteaddr);
|
|
nv_free(nvout);
|
|
goto close;
|
|
}
|
|
nv_free(nvout);
|
|
if (hast_proto_recv_hdr(out, &nvin) < 0) {
|
|
pjdlog_errno(LOG_WARNING,
|
|
"Unable to receive handshake header from %s",
|
|
res->hr_remoteaddr);
|
|
goto close;
|
|
}
|
|
errmsg = nv_get_string(nvin, "errmsg");
|
|
if (errmsg != NULL) {
|
|
pjdlog_warning("%s", errmsg);
|
|
nv_free(nvin);
|
|
goto close;
|
|
}
|
|
token = nv_get_uint8_array(nvin, &size, "token");
|
|
if (token == NULL) {
|
|
pjdlog_warning("Handshake header from %s has no 'token' field.",
|
|
res->hr_remoteaddr);
|
|
nv_free(nvin);
|
|
goto close;
|
|
}
|
|
if (size != sizeof(res->hr_token)) {
|
|
pjdlog_warning("Handshake header from %s contains 'token' of wrong size (got %zu, expected %zu).",
|
|
res->hr_remoteaddr, size, sizeof(res->hr_token));
|
|
nv_free(nvin);
|
|
goto close;
|
|
}
|
|
bcopy(token, res->hr_token, sizeof(res->hr_token));
|
|
nv_free(nvin);
|
|
|
|
/*
|
|
* Second handshake step.
|
|
* Setup incoming connection with remote node.
|
|
*/
|
|
if (proto_client(res->hr_remoteaddr, &in) < 0) {
|
|
pjdlog_errno(LOG_WARNING, "Unable to create connection to %s",
|
|
res->hr_remoteaddr);
|
|
}
|
|
/* Try to connect, but accept failure. */
|
|
if (proto_connect(in) < 0) {
|
|
pjdlog_errno(LOG_WARNING, "Unable to connect to %s",
|
|
res->hr_remoteaddr);
|
|
goto close;
|
|
}
|
|
/* Error in setting timeout is not critical, but why should it fail? */
|
|
if (proto_timeout(in, res->hr_timeout) < 0)
|
|
pjdlog_errno(LOG_WARNING, "Unable to set connection timeout");
|
|
nvout = nv_alloc();
|
|
nv_add_string(nvout, res->hr_name, "resource");
|
|
nv_add_uint8_array(nvout, res->hr_token, sizeof(res->hr_token),
|
|
"token");
|
|
nv_add_uint64(nvout, res->hr_resuid, "resuid");
|
|
nv_add_uint64(nvout, res->hr_primary_localcnt, "localcnt");
|
|
nv_add_uint64(nvout, res->hr_primary_remotecnt, "remotecnt");
|
|
if (nv_error(nvout) != 0) {
|
|
pjdlog_common(LOG_WARNING, 0, nv_error(nvout),
|
|
"Unable to allocate header for connection with %s",
|
|
res->hr_remoteaddr);
|
|
nv_free(nvout);
|
|
goto close;
|
|
}
|
|
if (hast_proto_send(res, in, nvout, NULL, 0) < 0) {
|
|
pjdlog_errno(LOG_WARNING,
|
|
"Unable to send handshake header to %s",
|
|
res->hr_remoteaddr);
|
|
nv_free(nvout);
|
|
goto close;
|
|
}
|
|
nv_free(nvout);
|
|
if (hast_proto_recv_hdr(out, &nvin) < 0) {
|
|
pjdlog_errno(LOG_WARNING,
|
|
"Unable to receive handshake header from %s",
|
|
res->hr_remoteaddr);
|
|
goto close;
|
|
}
|
|
errmsg = nv_get_string(nvin, "errmsg");
|
|
if (errmsg != NULL) {
|
|
pjdlog_warning("%s", errmsg);
|
|
nv_free(nvin);
|
|
goto close;
|
|
}
|
|
datasize = nv_get_int64(nvin, "datasize");
|
|
if (datasize != res->hr_datasize) {
|
|
pjdlog_warning("Data size differs between nodes (local=%jd, remote=%jd).",
|
|
(intmax_t)res->hr_datasize, (intmax_t)datasize);
|
|
nv_free(nvin);
|
|
goto close;
|
|
}
|
|
extentsize = nv_get_int32(nvin, "extentsize");
|
|
if (extentsize != res->hr_extentsize) {
|
|
pjdlog_warning("Extent size differs between nodes (local=%zd, remote=%zd).",
|
|
(ssize_t)res->hr_extentsize, (ssize_t)extentsize);
|
|
nv_free(nvin);
|
|
goto close;
|
|
}
|
|
res->hr_secondary_localcnt = nv_get_uint64(nvin, "localcnt");
|
|
res->hr_secondary_remotecnt = nv_get_uint64(nvin, "remotecnt");
|
|
res->hr_syncsrc = nv_get_uint8(nvin, "syncsrc");
|
|
map = NULL;
|
|
mapsize = nv_get_uint32(nvin, "mapsize");
|
|
if (mapsize > 0) {
|
|
map = malloc(mapsize);
|
|
if (map == NULL) {
|
|
pjdlog_error("Unable to allocate memory for remote activemap (mapsize=%ju).",
|
|
(uintmax_t)mapsize);
|
|
nv_free(nvin);
|
|
goto close;
|
|
}
|
|
/*
|
|
* Remote node have some dirty extents on its own, lets
|
|
* download its activemap.
|
|
*/
|
|
if (hast_proto_recv_data(res, out, nvin, map,
|
|
mapsize) < 0) {
|
|
pjdlog_errno(LOG_ERR,
|
|
"Unable to receive remote activemap");
|
|
nv_free(nvin);
|
|
free(map);
|
|
goto close;
|
|
}
|
|
/*
|
|
* Merge local and remote bitmaps.
|
|
*/
|
|
activemap_merge(res->hr_amp, map, mapsize);
|
|
free(map);
|
|
/*
|
|
* Now that we merged bitmaps from both nodes, flush it to the
|
|
* disk before we start to synchronize.
|
|
*/
|
|
(void)hast_activemap_flush(res);
|
|
}
|
|
pjdlog_info("Connected to %s.", res->hr_remoteaddr);
|
|
if (inp != NULL && outp != NULL) {
|
|
*inp = in;
|
|
*outp = out;
|
|
} else {
|
|
res->hr_remotein = in;
|
|
res->hr_remoteout = out;
|
|
}
|
|
return (true);
|
|
close:
|
|
proto_close(out);
|
|
if (in != NULL)
|
|
proto_close(in);
|
|
return (false);
|
|
}
|
|
|
|
static void
|
|
sync_start(void)
|
|
{
|
|
|
|
mtx_lock(&sync_lock);
|
|
sync_inprogress = true;
|
|
mtx_unlock(&sync_lock);
|
|
cv_signal(&sync_cond);
|
|
}
|
|
|
|
static void
|
|
init_ggate(struct hast_resource *res)
|
|
{
|
|
struct g_gate_ctl_create ggiocreate;
|
|
struct g_gate_ctl_cancel ggiocancel;
|
|
|
|
/*
|
|
* We communicate with ggate via /dev/ggctl. Open it.
|
|
*/
|
|
res->hr_ggatefd = open("/dev/" G_GATE_CTL_NAME, O_RDWR);
|
|
if (res->hr_ggatefd < 0)
|
|
primary_exit(EX_OSFILE, "Unable to open /dev/" G_GATE_CTL_NAME);
|
|
/*
|
|
* Create provider before trying to connect, as connection failure
|
|
* is not critical, but may take some time.
|
|
*/
|
|
ggiocreate.gctl_version = G_GATE_VERSION;
|
|
ggiocreate.gctl_mediasize = res->hr_datasize;
|
|
ggiocreate.gctl_sectorsize = res->hr_local_sectorsize;
|
|
ggiocreate.gctl_flags = 0;
|
|
ggiocreate.gctl_maxcount = G_GATE_MAX_QUEUE_SIZE;
|
|
ggiocreate.gctl_timeout = 0;
|
|
ggiocreate.gctl_unit = G_GATE_NAME_GIVEN;
|
|
snprintf(ggiocreate.gctl_name, sizeof(ggiocreate.gctl_name), "hast/%s",
|
|
res->hr_provname);
|
|
bzero(ggiocreate.gctl_info, sizeof(ggiocreate.gctl_info));
|
|
if (ioctl(res->hr_ggatefd, G_GATE_CMD_CREATE, &ggiocreate) == 0) {
|
|
pjdlog_info("Device hast/%s created.", res->hr_provname);
|
|
res->hr_ggateunit = ggiocreate.gctl_unit;
|
|
return;
|
|
}
|
|
if (errno != EEXIST) {
|
|
primary_exit(EX_OSERR, "Unable to create hast/%s device",
|
|
res->hr_provname);
|
|
}
|
|
pjdlog_debug(1,
|
|
"Device hast/%s already exists, we will try to take it over.",
|
|
res->hr_provname);
|
|
/*
|
|
* If we received EEXIST, we assume that the process who created the
|
|
* provider died and didn't clean up. In that case we will start from
|
|
* where he left of.
|
|
*/
|
|
ggiocancel.gctl_version = G_GATE_VERSION;
|
|
ggiocancel.gctl_unit = G_GATE_NAME_GIVEN;
|
|
snprintf(ggiocancel.gctl_name, sizeof(ggiocancel.gctl_name), "hast/%s",
|
|
res->hr_provname);
|
|
if (ioctl(res->hr_ggatefd, G_GATE_CMD_CANCEL, &ggiocancel) == 0) {
|
|
pjdlog_info("Device hast/%s recovered.", res->hr_provname);
|
|
res->hr_ggateunit = ggiocancel.gctl_unit;
|
|
return;
|
|
}
|
|
primary_exit(EX_OSERR, "Unable to take over hast/%s device",
|
|
res->hr_provname);
|
|
}
|
|
|
|
void
|
|
hastd_primary(struct hast_resource *res)
|
|
{
|
|
pthread_t td;
|
|
pid_t pid;
|
|
int error;
|
|
|
|
gres = res;
|
|
|
|
/*
|
|
* Create communication channel between parent and child.
|
|
*/
|
|
if (proto_client("socketpair://", &res->hr_ctrl) < 0) {
|
|
KEEP_ERRNO((void)pidfile_remove(pfh));
|
|
primary_exit(EX_OSERR,
|
|
"Unable to create control sockets between parent and child");
|
|
}
|
|
|
|
pid = fork();
|
|
if (pid < 0) {
|
|
KEEP_ERRNO((void)pidfile_remove(pfh));
|
|
primary_exit(EX_TEMPFAIL, "Unable to fork");
|
|
}
|
|
|
|
if (pid > 0) {
|
|
/* This is parent. */
|
|
res->hr_workerpid = pid;
|
|
return;
|
|
}
|
|
(void)pidfile_close(pfh);
|
|
|
|
setproctitle("%s (primary)", res->hr_name);
|
|
|
|
init_local(res);
|
|
if (init_remote(res, NULL, NULL))
|
|
sync_start();
|
|
init_ggate(res);
|
|
init_environment(res);
|
|
error = pthread_create(&td, NULL, ggate_recv_thread, res);
|
|
assert(error == 0);
|
|
error = pthread_create(&td, NULL, local_send_thread, res);
|
|
assert(error == 0);
|
|
error = pthread_create(&td, NULL, remote_send_thread, res);
|
|
assert(error == 0);
|
|
error = pthread_create(&td, NULL, remote_recv_thread, res);
|
|
assert(error == 0);
|
|
error = pthread_create(&td, NULL, ggate_send_thread, res);
|
|
assert(error == 0);
|
|
error = pthread_create(&td, NULL, sync_thread, res);
|
|
assert(error == 0);
|
|
error = pthread_create(&td, NULL, ctrl_thread, res);
|
|
assert(error == 0);
|
|
(void)guard_thread(res);
|
|
}
|
|
|
|
static void
|
|
reqlog(int loglevel, int debuglevel, struct g_gate_ctl_io *ggio, const char *fmt, ...)
|
|
{
|
|
char msg[1024];
|
|
va_list ap;
|
|
int len;
|
|
|
|
va_start(ap, fmt);
|
|
len = vsnprintf(msg, sizeof(msg), fmt, ap);
|
|
va_end(ap);
|
|
if ((size_t)len < sizeof(msg)) {
|
|
switch (ggio->gctl_cmd) {
|
|
case BIO_READ:
|
|
(void)snprintf(msg + len, sizeof(msg) - len,
|
|
"READ(%ju, %ju).", (uintmax_t)ggio->gctl_offset,
|
|
(uintmax_t)ggio->gctl_length);
|
|
break;
|
|
case BIO_DELETE:
|
|
(void)snprintf(msg + len, sizeof(msg) - len,
|
|
"DELETE(%ju, %ju).", (uintmax_t)ggio->gctl_offset,
|
|
(uintmax_t)ggio->gctl_length);
|
|
break;
|
|
case BIO_FLUSH:
|
|
(void)snprintf(msg + len, sizeof(msg) - len, "FLUSH.");
|
|
break;
|
|
case BIO_WRITE:
|
|
(void)snprintf(msg + len, sizeof(msg) - len,
|
|
"WRITE(%ju, %ju).", (uintmax_t)ggio->gctl_offset,
|
|
(uintmax_t)ggio->gctl_length);
|
|
break;
|
|
default:
|
|
(void)snprintf(msg + len, sizeof(msg) - len,
|
|
"UNKNOWN(%u).", (unsigned int)ggio->gctl_cmd);
|
|
break;
|
|
}
|
|
}
|
|
pjdlog_common(loglevel, debuglevel, -1, "%s", msg);
|
|
}
|
|
|
|
static void
|
|
remote_close(struct hast_resource *res, int ncomp)
|
|
{
|
|
|
|
rw_wlock(&hio_remote_lock[ncomp]);
|
|
/*
|
|
* A race is possible between dropping rlock and acquiring wlock -
|
|
* another thread can close connection in-between.
|
|
*/
|
|
if (!ISCONNECTED(res, ncomp)) {
|
|
assert(res->hr_remotein == NULL);
|
|
assert(res->hr_remoteout == NULL);
|
|
rw_unlock(&hio_remote_lock[ncomp]);
|
|
return;
|
|
}
|
|
|
|
assert(res->hr_remotein != NULL);
|
|
assert(res->hr_remoteout != NULL);
|
|
|
|
pjdlog_debug(2, "Closing old incoming connection to %s.",
|
|
res->hr_remoteaddr);
|
|
proto_close(res->hr_remotein);
|
|
res->hr_remotein = NULL;
|
|
pjdlog_debug(2, "Closing old outgoing connection to %s.",
|
|
res->hr_remoteaddr);
|
|
proto_close(res->hr_remoteout);
|
|
res->hr_remoteout = NULL;
|
|
|
|
rw_unlock(&hio_remote_lock[ncomp]);
|
|
|
|
/*
|
|
* Stop synchronization if in-progress.
|
|
*/
|
|
mtx_lock(&sync_lock);
|
|
if (sync_inprogress)
|
|
sync_inprogress = false;
|
|
mtx_unlock(&sync_lock);
|
|
|
|
/*
|
|
* Wake up guard thread, so it can immediately start reconnect.
|
|
*/
|
|
mtx_lock(&hio_guard_lock);
|
|
cv_signal(&hio_guard_cond);
|
|
mtx_unlock(&hio_guard_lock);
|
|
}
|
|
|
|
/*
|
|
* Thread receives ggate I/O requests from the kernel and passes them to
|
|
* appropriate threads:
|
|
* WRITE - always goes to both local_send and remote_send threads
|
|
* READ (when the block is up-to-date on local component) -
|
|
* only local_send thread
|
|
* READ (when the block isn't up-to-date on local component) -
|
|
* only remote_send thread
|
|
* DELETE - always goes to both local_send and remote_send threads
|
|
* FLUSH - always goes to both local_send and remote_send threads
|
|
*/
|
|
static void *
|
|
ggate_recv_thread(void *arg)
|
|
{
|
|
struct hast_resource *res = arg;
|
|
struct g_gate_ctl_io *ggio;
|
|
struct hio *hio;
|
|
unsigned int ii, ncomp, ncomps;
|
|
int error;
|
|
|
|
ncomps = HAST_NCOMPONENTS;
|
|
|
|
for (;;) {
|
|
pjdlog_debug(2, "ggate_recv: Taking free request.");
|
|
QUEUE_TAKE2(hio, free);
|
|
pjdlog_debug(2, "ggate_recv: (%p) Got free request.", hio);
|
|
ggio = &hio->hio_ggio;
|
|
ggio->gctl_unit = res->hr_ggateunit;
|
|
ggio->gctl_length = MAXPHYS;
|
|
ggio->gctl_error = 0;
|
|
pjdlog_debug(2,
|
|
"ggate_recv: (%p) Waiting for request from the kernel.",
|
|
hio);
|
|
if (ioctl(res->hr_ggatefd, G_GATE_CMD_START, ggio) < 0) {
|
|
if (sigexit_received)
|
|
pthread_exit(NULL);
|
|
primary_exit(EX_OSERR, "G_GATE_CMD_START failed");
|
|
}
|
|
error = ggio->gctl_error;
|
|
switch (error) {
|
|
case 0:
|
|
break;
|
|
case ECANCELED:
|
|
/* Exit gracefully. */
|
|
if (!sigexit_received) {
|
|
pjdlog_debug(2,
|
|
"ggate_recv: (%p) Received cancel from the kernel.",
|
|
hio);
|
|
pjdlog_info("Received cancel from the kernel, exiting.");
|
|
}
|
|
pthread_exit(NULL);
|
|
case ENOMEM:
|
|
/*
|
|
* Buffer too small? Impossible, we allocate MAXPHYS
|
|
* bytes - request can't be bigger than that.
|
|
*/
|
|
/* FALLTHROUGH */
|
|
case ENXIO:
|
|
default:
|
|
primary_exitx(EX_OSERR, "G_GATE_CMD_START failed: %s.",
|
|
strerror(error));
|
|
}
|
|
for (ii = 0; ii < ncomps; ii++)
|
|
hio->hio_errors[ii] = EINVAL;
|
|
reqlog(LOG_DEBUG, 2, ggio,
|
|
"ggate_recv: (%p) Request received from the kernel: ",
|
|
hio);
|
|
/*
|
|
* Inform all components about new write request.
|
|
* For read request prefer local component unless the given
|
|
* range is out-of-date, then use remote component.
|
|
*/
|
|
switch (ggio->gctl_cmd) {
|
|
case BIO_READ:
|
|
pjdlog_debug(2,
|
|
"ggate_recv: (%p) Moving request to the send queue.",
|
|
hio);
|
|
refcount_init(&hio->hio_countdown, 1);
|
|
mtx_lock(&metadata_lock);
|
|
if (res->hr_syncsrc == HAST_SYNCSRC_UNDEF ||
|
|
res->hr_syncsrc == HAST_SYNCSRC_PRIMARY) {
|
|
/*
|
|
* This range is up-to-date on local component,
|
|
* so handle request locally.
|
|
*/
|
|
/* Local component is 0 for now. */
|
|
ncomp = 0;
|
|
} else /* if (res->hr_syncsrc ==
|
|
HAST_SYNCSRC_SECONDARY) */ {
|
|
assert(res->hr_syncsrc ==
|
|
HAST_SYNCSRC_SECONDARY);
|
|
/*
|
|
* This range is out-of-date on local component,
|
|
* so send request to the remote node.
|
|
*/
|
|
/* Remote component is 1 for now. */
|
|
ncomp = 1;
|
|
}
|
|
mtx_unlock(&metadata_lock);
|
|
QUEUE_INSERT1(hio, send, ncomp);
|
|
break;
|
|
case BIO_WRITE:
|
|
for (;;) {
|
|
mtx_lock(&range_lock);
|
|
if (rangelock_islocked(range_sync,
|
|
ggio->gctl_offset, ggio->gctl_length)) {
|
|
pjdlog_debug(2,
|
|
"regular: Range offset=%jd length=%zu locked.",
|
|
(intmax_t)ggio->gctl_offset,
|
|
(size_t)ggio->gctl_length);
|
|
range_regular_wait = true;
|
|
cv_wait(&range_regular_cond, &range_lock);
|
|
range_regular_wait = false;
|
|
mtx_unlock(&range_lock);
|
|
continue;
|
|
}
|
|
if (rangelock_add(range_regular,
|
|
ggio->gctl_offset, ggio->gctl_length) < 0) {
|
|
mtx_unlock(&range_lock);
|
|
pjdlog_debug(2,
|
|
"regular: Range offset=%jd length=%zu is already locked, waiting.",
|
|
(intmax_t)ggio->gctl_offset,
|
|
(size_t)ggio->gctl_length);
|
|
sleep(1);
|
|
continue;
|
|
}
|
|
mtx_unlock(&range_lock);
|
|
break;
|
|
}
|
|
mtx_lock(&res->hr_amp_lock);
|
|
if (activemap_write_start(res->hr_amp,
|
|
ggio->gctl_offset, ggio->gctl_length)) {
|
|
(void)hast_activemap_flush(res);
|
|
}
|
|
mtx_unlock(&res->hr_amp_lock);
|
|
/* FALLTHROUGH */
|
|
case BIO_DELETE:
|
|
case BIO_FLUSH:
|
|
pjdlog_debug(2,
|
|
"ggate_recv: (%p) Moving request to the send queues.",
|
|
hio);
|
|
refcount_init(&hio->hio_countdown, ncomps);
|
|
for (ii = 0; ii < ncomps; ii++)
|
|
QUEUE_INSERT1(hio, send, ii);
|
|
break;
|
|
}
|
|
}
|
|
/* NOTREACHED */
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Thread reads from or writes to local component.
|
|
* If local read fails, it redirects it to remote_send thread.
|
|
*/
|
|
static void *
|
|
local_send_thread(void *arg)
|
|
{
|
|
struct hast_resource *res = arg;
|
|
struct g_gate_ctl_io *ggio;
|
|
struct hio *hio;
|
|
unsigned int ncomp, rncomp;
|
|
ssize_t ret;
|
|
|
|
/* Local component is 0 for now. */
|
|
ncomp = 0;
|
|
/* Remote component is 1 for now. */
|
|
rncomp = 1;
|
|
|
|
for (;;) {
|
|
pjdlog_debug(2, "local_send: Taking request.");
|
|
QUEUE_TAKE1(hio, send, ncomp);
|
|
pjdlog_debug(2, "local_send: (%p) Got request.", hio);
|
|
ggio = &hio->hio_ggio;
|
|
switch (ggio->gctl_cmd) {
|
|
case BIO_READ:
|
|
ret = pread(res->hr_localfd, ggio->gctl_data,
|
|
ggio->gctl_length,
|
|
ggio->gctl_offset + res->hr_localoff);
|
|
if (ret == ggio->gctl_length)
|
|
hio->hio_errors[ncomp] = 0;
|
|
else {
|
|
/*
|
|
* If READ failed, try to read from remote node.
|
|
*/
|
|
QUEUE_INSERT1(hio, send, rncomp);
|
|
continue;
|
|
}
|
|
break;
|
|
case BIO_WRITE:
|
|
ret = pwrite(res->hr_localfd, ggio->gctl_data,
|
|
ggio->gctl_length,
|
|
ggio->gctl_offset + res->hr_localoff);
|
|
if (ret < 0)
|
|
hio->hio_errors[ncomp] = errno;
|
|
else if (ret != ggio->gctl_length)
|
|
hio->hio_errors[ncomp] = EIO;
|
|
else
|
|
hio->hio_errors[ncomp] = 0;
|
|
break;
|
|
case BIO_DELETE:
|
|
ret = g_delete(res->hr_localfd,
|
|
ggio->gctl_offset + res->hr_localoff,
|
|
ggio->gctl_length);
|
|
if (ret < 0)
|
|
hio->hio_errors[ncomp] = errno;
|
|
else
|
|
hio->hio_errors[ncomp] = 0;
|
|
break;
|
|
case BIO_FLUSH:
|
|
ret = g_flush(res->hr_localfd);
|
|
if (ret < 0)
|
|
hio->hio_errors[ncomp] = errno;
|
|
else
|
|
hio->hio_errors[ncomp] = 0;
|
|
break;
|
|
}
|
|
if (refcount_release(&hio->hio_countdown)) {
|
|
if (ISSYNCREQ(hio)) {
|
|
mtx_lock(&sync_lock);
|
|
SYNCREQDONE(hio);
|
|
mtx_unlock(&sync_lock);
|
|
cv_signal(&sync_cond);
|
|
} else {
|
|
pjdlog_debug(2,
|
|
"local_send: (%p) Moving request to the done queue.",
|
|
hio);
|
|
QUEUE_INSERT2(hio, done);
|
|
}
|
|
}
|
|
}
|
|
/* NOTREACHED */
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Thread sends request to secondary node.
|
|
*/
|
|
static void *
|
|
remote_send_thread(void *arg)
|
|
{
|
|
struct hast_resource *res = arg;
|
|
struct g_gate_ctl_io *ggio;
|
|
struct hio *hio;
|
|
struct nv *nv;
|
|
unsigned int ncomp;
|
|
bool wakeup;
|
|
uint64_t offset, length;
|
|
uint8_t cmd;
|
|
void *data;
|
|
|
|
/* Remote component is 1 for now. */
|
|
ncomp = 1;
|
|
|
|
for (;;) {
|
|
pjdlog_debug(2, "remote_send: Taking request.");
|
|
QUEUE_TAKE1(hio, send, ncomp);
|
|
pjdlog_debug(2, "remote_send: (%p) Got request.", hio);
|
|
ggio = &hio->hio_ggio;
|
|
switch (ggio->gctl_cmd) {
|
|
case BIO_READ:
|
|
cmd = HIO_READ;
|
|
data = NULL;
|
|
offset = ggio->gctl_offset;
|
|
length = ggio->gctl_length;
|
|
break;
|
|
case BIO_WRITE:
|
|
cmd = HIO_WRITE;
|
|
data = ggio->gctl_data;
|
|
offset = ggio->gctl_offset;
|
|
length = ggio->gctl_length;
|
|
break;
|
|
case BIO_DELETE:
|
|
cmd = HIO_DELETE;
|
|
data = NULL;
|
|
offset = ggio->gctl_offset;
|
|
length = ggio->gctl_length;
|
|
break;
|
|
case BIO_FLUSH:
|
|
cmd = HIO_FLUSH;
|
|
data = NULL;
|
|
offset = 0;
|
|
length = 0;
|
|
break;
|
|
default:
|
|
assert(!"invalid condition");
|
|
abort();
|
|
}
|
|
nv = nv_alloc();
|
|
nv_add_uint8(nv, cmd, "cmd");
|
|
nv_add_uint64(nv, (uint64_t)ggio->gctl_seq, "seq");
|
|
nv_add_uint64(nv, offset, "offset");
|
|
nv_add_uint64(nv, length, "length");
|
|
if (nv_error(nv) != 0) {
|
|
hio->hio_errors[ncomp] = nv_error(nv);
|
|
pjdlog_debug(2,
|
|
"remote_send: (%p) Unable to prepare header to send.",
|
|
hio);
|
|
reqlog(LOG_ERR, 0, ggio,
|
|
"Unable to prepare header to send (%s): ",
|
|
strerror(nv_error(nv)));
|
|
/* Move failed request immediately to the done queue. */
|
|
goto done_queue;
|
|
}
|
|
pjdlog_debug(2,
|
|
"remote_send: (%p) Moving request to the recv queue.",
|
|
hio);
|
|
/*
|
|
* Protect connection from disappearing.
|
|
*/
|
|
rw_rlock(&hio_remote_lock[ncomp]);
|
|
if (!ISCONNECTED(res, ncomp)) {
|
|
rw_unlock(&hio_remote_lock[ncomp]);
|
|
hio->hio_errors[ncomp] = ENOTCONN;
|
|
goto done_queue;
|
|
}
|
|
/*
|
|
* Move the request to recv queue before sending it, because
|
|
* in different order we can get reply before we move request
|
|
* to recv queue.
|
|
*/
|
|
mtx_lock(&hio_recv_list_lock[ncomp]);
|
|
wakeup = TAILQ_EMPTY(&hio_recv_list[ncomp]);
|
|
TAILQ_INSERT_TAIL(&hio_recv_list[ncomp], hio, hio_next[ncomp]);
|
|
mtx_unlock(&hio_recv_list_lock[ncomp]);
|
|
if (hast_proto_send(res, res->hr_remoteout, nv, data,
|
|
data != NULL ? length : 0) < 0) {
|
|
hio->hio_errors[ncomp] = errno;
|
|
rw_unlock(&hio_remote_lock[ncomp]);
|
|
remote_close(res, ncomp);
|
|
pjdlog_debug(2,
|
|
"remote_send: (%p) Unable to send request.", hio);
|
|
reqlog(LOG_ERR, 0, ggio,
|
|
"Unable to send request (%s): ",
|
|
strerror(hio->hio_errors[ncomp]));
|
|
/*
|
|
* Take request back from the receive queue and move
|
|
* it immediately to the done queue.
|
|
*/
|
|
mtx_lock(&hio_recv_list_lock[ncomp]);
|
|
TAILQ_REMOVE(&hio_recv_list[ncomp], hio, hio_next[ncomp]);
|
|
mtx_unlock(&hio_recv_list_lock[ncomp]);
|
|
goto done_queue;
|
|
}
|
|
rw_unlock(&hio_remote_lock[ncomp]);
|
|
nv_free(nv);
|
|
if (wakeup)
|
|
cv_signal(&hio_recv_list_cond[ncomp]);
|
|
continue;
|
|
done_queue:
|
|
nv_free(nv);
|
|
if (ISSYNCREQ(hio)) {
|
|
if (!refcount_release(&hio->hio_countdown))
|
|
continue;
|
|
mtx_lock(&sync_lock);
|
|
SYNCREQDONE(hio);
|
|
mtx_unlock(&sync_lock);
|
|
cv_signal(&sync_cond);
|
|
continue;
|
|
}
|
|
if (ggio->gctl_cmd == BIO_WRITE) {
|
|
mtx_lock(&res->hr_amp_lock);
|
|
if (activemap_need_sync(res->hr_amp, ggio->gctl_offset,
|
|
ggio->gctl_length)) {
|
|
(void)hast_activemap_flush(res);
|
|
}
|
|
mtx_unlock(&res->hr_amp_lock);
|
|
}
|
|
if (!refcount_release(&hio->hio_countdown))
|
|
continue;
|
|
pjdlog_debug(2,
|
|
"remote_send: (%p) Moving request to the done queue.",
|
|
hio);
|
|
QUEUE_INSERT2(hio, done);
|
|
}
|
|
/* NOTREACHED */
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Thread receives answer from secondary node and passes it to ggate_send
|
|
* thread.
|
|
*/
|
|
static void *
|
|
remote_recv_thread(void *arg)
|
|
{
|
|
struct hast_resource *res = arg;
|
|
struct g_gate_ctl_io *ggio;
|
|
struct hio *hio;
|
|
struct nv *nv;
|
|
unsigned int ncomp;
|
|
uint64_t seq;
|
|
int error;
|
|
|
|
/* Remote component is 1 for now. */
|
|
ncomp = 1;
|
|
|
|
for (;;) {
|
|
/* Wait until there is anything to receive. */
|
|
mtx_lock(&hio_recv_list_lock[ncomp]);
|
|
while (TAILQ_EMPTY(&hio_recv_list[ncomp])) {
|
|
pjdlog_debug(2, "remote_recv: No requests, waiting.");
|
|
cv_wait(&hio_recv_list_cond[ncomp],
|
|
&hio_recv_list_lock[ncomp]);
|
|
}
|
|
mtx_unlock(&hio_recv_list_lock[ncomp]);
|
|
rw_rlock(&hio_remote_lock[ncomp]);
|
|
if (!ISCONNECTED(res, ncomp)) {
|
|
rw_unlock(&hio_remote_lock[ncomp]);
|
|
/*
|
|
* Connection is dead, so move all pending requests to
|
|
* the done queue (one-by-one).
|
|
*/
|
|
mtx_lock(&hio_recv_list_lock[ncomp]);
|
|
hio = TAILQ_FIRST(&hio_recv_list[ncomp]);
|
|
assert(hio != NULL);
|
|
TAILQ_REMOVE(&hio_recv_list[ncomp], hio,
|
|
hio_next[ncomp]);
|
|
mtx_unlock(&hio_recv_list_lock[ncomp]);
|
|
goto done_queue;
|
|
}
|
|
if (hast_proto_recv_hdr(res->hr_remotein, &nv) < 0) {
|
|
pjdlog_errno(LOG_ERR,
|
|
"Unable to receive reply header");
|
|
rw_unlock(&hio_remote_lock[ncomp]);
|
|
remote_close(res, ncomp);
|
|
continue;
|
|
}
|
|
rw_unlock(&hio_remote_lock[ncomp]);
|
|
seq = nv_get_uint64(nv, "seq");
|
|
if (seq == 0) {
|
|
pjdlog_error("Header contains no 'seq' field.");
|
|
nv_free(nv);
|
|
continue;
|
|
}
|
|
mtx_lock(&hio_recv_list_lock[ncomp]);
|
|
TAILQ_FOREACH(hio, &hio_recv_list[ncomp], hio_next[ncomp]) {
|
|
if (hio->hio_ggio.gctl_seq == seq) {
|
|
TAILQ_REMOVE(&hio_recv_list[ncomp], hio,
|
|
hio_next[ncomp]);
|
|
break;
|
|
}
|
|
}
|
|
mtx_unlock(&hio_recv_list_lock[ncomp]);
|
|
if (hio == NULL) {
|
|
pjdlog_error("Found no request matching received 'seq' field (%ju).",
|
|
(uintmax_t)seq);
|
|
nv_free(nv);
|
|
continue;
|
|
}
|
|
error = nv_get_int16(nv, "error");
|
|
if (error != 0) {
|
|
/* Request failed on remote side. */
|
|
hio->hio_errors[ncomp] = 0;
|
|
nv_free(nv);
|
|
goto done_queue;
|
|
}
|
|
ggio = &hio->hio_ggio;
|
|
switch (ggio->gctl_cmd) {
|
|
case BIO_READ:
|
|
rw_rlock(&hio_remote_lock[ncomp]);
|
|
if (!ISCONNECTED(res, ncomp)) {
|
|
rw_unlock(&hio_remote_lock[ncomp]);
|
|
nv_free(nv);
|
|
goto done_queue;
|
|
}
|
|
if (hast_proto_recv_data(res, res->hr_remotein, nv,
|
|
ggio->gctl_data, ggio->gctl_length) < 0) {
|
|
hio->hio_errors[ncomp] = errno;
|
|
pjdlog_errno(LOG_ERR,
|
|
"Unable to receive reply data");
|
|
rw_unlock(&hio_remote_lock[ncomp]);
|
|
nv_free(nv);
|
|
remote_close(res, ncomp);
|
|
goto done_queue;
|
|
}
|
|
rw_unlock(&hio_remote_lock[ncomp]);
|
|
break;
|
|
case BIO_WRITE:
|
|
case BIO_DELETE:
|
|
case BIO_FLUSH:
|
|
break;
|
|
default:
|
|
assert(!"invalid condition");
|
|
abort();
|
|
}
|
|
hio->hio_errors[ncomp] = 0;
|
|
nv_free(nv);
|
|
done_queue:
|
|
if (refcount_release(&hio->hio_countdown)) {
|
|
if (ISSYNCREQ(hio)) {
|
|
mtx_lock(&sync_lock);
|
|
SYNCREQDONE(hio);
|
|
mtx_unlock(&sync_lock);
|
|
cv_signal(&sync_cond);
|
|
} else {
|
|
pjdlog_debug(2,
|
|
"remote_recv: (%p) Moving request to the done queue.",
|
|
hio);
|
|
QUEUE_INSERT2(hio, done);
|
|
}
|
|
}
|
|
}
|
|
/* NOTREACHED */
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Thread sends answer to the kernel.
|
|
*/
|
|
static void *
|
|
ggate_send_thread(void *arg)
|
|
{
|
|
struct hast_resource *res = arg;
|
|
struct g_gate_ctl_io *ggio;
|
|
struct hio *hio;
|
|
unsigned int ii, ncomp, ncomps;
|
|
|
|
ncomps = HAST_NCOMPONENTS;
|
|
|
|
for (;;) {
|
|
pjdlog_debug(2, "ggate_send: Taking request.");
|
|
QUEUE_TAKE2(hio, done);
|
|
pjdlog_debug(2, "ggate_send: (%p) Got request.", hio);
|
|
ggio = &hio->hio_ggio;
|
|
for (ii = 0; ii < ncomps; ii++) {
|
|
if (hio->hio_errors[ii] == 0) {
|
|
/*
|
|
* One successful request is enough to declare
|
|
* success.
|
|
*/
|
|
ggio->gctl_error = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (ii == ncomps) {
|
|
/*
|
|
* None of the requests were successful.
|
|
* Use first error.
|
|
*/
|
|
ggio->gctl_error = hio->hio_errors[0];
|
|
}
|
|
if (ggio->gctl_error == 0 && ggio->gctl_cmd == BIO_WRITE) {
|
|
mtx_lock(&res->hr_amp_lock);
|
|
activemap_write_complete(res->hr_amp,
|
|
ggio->gctl_offset, ggio->gctl_length);
|
|
mtx_unlock(&res->hr_amp_lock);
|
|
}
|
|
if (ggio->gctl_cmd == BIO_WRITE) {
|
|
/*
|
|
* Unlock range we locked.
|
|
*/
|
|
mtx_lock(&range_lock);
|
|
rangelock_del(range_regular, ggio->gctl_offset,
|
|
ggio->gctl_length);
|
|
if (range_sync_wait)
|
|
cv_signal(&range_sync_cond);
|
|
mtx_unlock(&range_lock);
|
|
/*
|
|
* Bump local count if this is first write after
|
|
* connection failure with remote node.
|
|
*/
|
|
ncomp = 1;
|
|
rw_rlock(&hio_remote_lock[ncomp]);
|
|
if (!ISCONNECTED(res, ncomp)) {
|
|
mtx_lock(&metadata_lock);
|
|
if (res->hr_primary_localcnt ==
|
|
res->hr_secondary_remotecnt) {
|
|
res->hr_primary_localcnt++;
|
|
pjdlog_debug(1,
|
|
"Increasing localcnt to %ju.",
|
|
(uintmax_t)res->hr_primary_localcnt);
|
|
(void)metadata_write(res);
|
|
}
|
|
mtx_unlock(&metadata_lock);
|
|
}
|
|
rw_unlock(&hio_remote_lock[ncomp]);
|
|
}
|
|
if (ioctl(res->hr_ggatefd, G_GATE_CMD_DONE, ggio) < 0)
|
|
primary_exit(EX_OSERR, "G_GATE_CMD_DONE failed");
|
|
pjdlog_debug(2,
|
|
"ggate_send: (%p) Moving request to the free queue.", hio);
|
|
QUEUE_INSERT2(hio, free);
|
|
}
|
|
/* NOTREACHED */
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Thread synchronize local and remote components.
|
|
*/
|
|
static void *
|
|
sync_thread(void *arg __unused)
|
|
{
|
|
struct hast_resource *res = arg;
|
|
struct hio *hio;
|
|
struct g_gate_ctl_io *ggio;
|
|
unsigned int ii, ncomp, ncomps;
|
|
off_t offset, length, synced;
|
|
bool dorewind;
|
|
int syncext;
|
|
|
|
ncomps = HAST_NCOMPONENTS;
|
|
dorewind = true;
|
|
synced = 0;
|
|
|
|
for (;;) {
|
|
mtx_lock(&sync_lock);
|
|
while (!sync_inprogress) {
|
|
dorewind = true;
|
|
synced = 0;
|
|
cv_wait(&sync_cond, &sync_lock);
|
|
}
|
|
mtx_unlock(&sync_lock);
|
|
/*
|
|
* Obtain offset at which we should synchronize.
|
|
* Rewind synchronization if needed.
|
|
*/
|
|
mtx_lock(&res->hr_amp_lock);
|
|
if (dorewind)
|
|
activemap_sync_rewind(res->hr_amp);
|
|
offset = activemap_sync_offset(res->hr_amp, &length, &syncext);
|
|
if (syncext != -1) {
|
|
/*
|
|
* We synchronized entire syncext extent, we can mark
|
|
* it as clean now.
|
|
*/
|
|
if (activemap_extent_complete(res->hr_amp, syncext))
|
|
(void)hast_activemap_flush(res);
|
|
}
|
|
mtx_unlock(&res->hr_amp_lock);
|
|
if (dorewind) {
|
|
dorewind = false;
|
|
if (offset < 0)
|
|
pjdlog_info("Nodes are in sync.");
|
|
else {
|
|
pjdlog_info("Synchronization started. %ju bytes to go.",
|
|
(uintmax_t)(res->hr_extentsize *
|
|
activemap_ndirty(res->hr_amp)));
|
|
}
|
|
}
|
|
if (offset < 0) {
|
|
mtx_lock(&sync_lock);
|
|
sync_inprogress = false;
|
|
mtx_unlock(&sync_lock);
|
|
pjdlog_debug(1, "Nothing to synchronize.");
|
|
/*
|
|
* Synchronization complete, make both localcnt and
|
|
* remotecnt equal.
|
|
*/
|
|
ncomp = 1;
|
|
rw_rlock(&hio_remote_lock[ncomp]);
|
|
if (ISCONNECTED(res, ncomp)) {
|
|
if (synced > 0) {
|
|
pjdlog_info("Synchronization complete. "
|
|
"%jd bytes synchronized.",
|
|
(intmax_t)synced);
|
|
}
|
|
mtx_lock(&metadata_lock);
|
|
res->hr_syncsrc = HAST_SYNCSRC_UNDEF;
|
|
res->hr_primary_localcnt =
|
|
res->hr_secondary_localcnt;
|
|
res->hr_primary_remotecnt =
|
|
res->hr_secondary_remotecnt;
|
|
pjdlog_debug(1,
|
|
"Setting localcnt to %ju and remotecnt to %ju.",
|
|
(uintmax_t)res->hr_primary_localcnt,
|
|
(uintmax_t)res->hr_secondary_localcnt);
|
|
(void)metadata_write(res);
|
|
mtx_unlock(&metadata_lock);
|
|
} else if (synced > 0) {
|
|
pjdlog_info("Synchronization interrupted. "
|
|
"%jd bytes synchronized so far.",
|
|
(intmax_t)synced);
|
|
}
|
|
rw_unlock(&hio_remote_lock[ncomp]);
|
|
continue;
|
|
}
|
|
pjdlog_debug(2, "sync: Taking free request.");
|
|
QUEUE_TAKE2(hio, free);
|
|
pjdlog_debug(2, "sync: (%p) Got free request.", hio);
|
|
/*
|
|
* Lock the range we are going to synchronize. We don't want
|
|
* race where someone writes between our read and write.
|
|
*/
|
|
for (;;) {
|
|
mtx_lock(&range_lock);
|
|
if (rangelock_islocked(range_regular, offset, length)) {
|
|
pjdlog_debug(2,
|
|
"sync: Range offset=%jd length=%jd locked.",
|
|
(intmax_t)offset, (intmax_t)length);
|
|
range_sync_wait = true;
|
|
cv_wait(&range_sync_cond, &range_lock);
|
|
range_sync_wait = false;
|
|
mtx_unlock(&range_lock);
|
|
continue;
|
|
}
|
|
if (rangelock_add(range_sync, offset, length) < 0) {
|
|
mtx_unlock(&range_lock);
|
|
pjdlog_debug(2,
|
|
"sync: Range offset=%jd length=%jd is already locked, waiting.",
|
|
(intmax_t)offset, (intmax_t)length);
|
|
sleep(1);
|
|
continue;
|
|
}
|
|
mtx_unlock(&range_lock);
|
|
break;
|
|
}
|
|
/*
|
|
* First read the data from synchronization source.
|
|
*/
|
|
SYNCREQ(hio);
|
|
ggio = &hio->hio_ggio;
|
|
ggio->gctl_cmd = BIO_READ;
|
|
ggio->gctl_offset = offset;
|
|
ggio->gctl_length = length;
|
|
ggio->gctl_error = 0;
|
|
for (ii = 0; ii < ncomps; ii++)
|
|
hio->hio_errors[ii] = EINVAL;
|
|
reqlog(LOG_DEBUG, 2, ggio, "sync: (%p) Sending sync request: ",
|
|
hio);
|
|
pjdlog_debug(2, "sync: (%p) Moving request to the send queue.",
|
|
hio);
|
|
mtx_lock(&metadata_lock);
|
|
if (res->hr_syncsrc == HAST_SYNCSRC_PRIMARY) {
|
|
/*
|
|
* This range is up-to-date on local component,
|
|
* so handle request locally.
|
|
*/
|
|
/* Local component is 0 for now. */
|
|
ncomp = 0;
|
|
} else /* if (res->hr_syncsrc == HAST_SYNCSRC_SECONDARY) */ {
|
|
assert(res->hr_syncsrc == HAST_SYNCSRC_SECONDARY);
|
|
/*
|
|
* This range is out-of-date on local component,
|
|
* so send request to the remote node.
|
|
*/
|
|
/* Remote component is 1 for now. */
|
|
ncomp = 1;
|
|
}
|
|
mtx_unlock(&metadata_lock);
|
|
refcount_init(&hio->hio_countdown, 1);
|
|
QUEUE_INSERT1(hio, send, ncomp);
|
|
|
|
/*
|
|
* Let's wait for READ to finish.
|
|
*/
|
|
mtx_lock(&sync_lock);
|
|
while (!ISSYNCREQDONE(hio))
|
|
cv_wait(&sync_cond, &sync_lock);
|
|
mtx_unlock(&sync_lock);
|
|
|
|
if (hio->hio_errors[ncomp] != 0) {
|
|
pjdlog_error("Unable to read synchronization data: %s.",
|
|
strerror(hio->hio_errors[ncomp]));
|
|
goto free_queue;
|
|
}
|
|
|
|
/*
|
|
* We read the data from synchronization source, now write it
|
|
* to synchronization target.
|
|
*/
|
|
SYNCREQ(hio);
|
|
ggio->gctl_cmd = BIO_WRITE;
|
|
for (ii = 0; ii < ncomps; ii++)
|
|
hio->hio_errors[ii] = EINVAL;
|
|
reqlog(LOG_DEBUG, 2, ggio, "sync: (%p) Sending sync request: ",
|
|
hio);
|
|
pjdlog_debug(2, "sync: (%p) Moving request to the send queue.",
|
|
hio);
|
|
mtx_lock(&metadata_lock);
|
|
if (res->hr_syncsrc == HAST_SYNCSRC_PRIMARY) {
|
|
/*
|
|
* This range is up-to-date on local component,
|
|
* so we update remote component.
|
|
*/
|
|
/* Remote component is 1 for now. */
|
|
ncomp = 1;
|
|
} else /* if (res->hr_syncsrc == HAST_SYNCSRC_SECONDARY) */ {
|
|
assert(res->hr_syncsrc == HAST_SYNCSRC_SECONDARY);
|
|
/*
|
|
* This range is out-of-date on local component,
|
|
* so we update it.
|
|
*/
|
|
/* Local component is 0 for now. */
|
|
ncomp = 0;
|
|
}
|
|
mtx_unlock(&metadata_lock);
|
|
|
|
pjdlog_debug(2, "sync: (%p) Moving request to the send queues.",
|
|
hio);
|
|
refcount_init(&hio->hio_countdown, 1);
|
|
QUEUE_INSERT1(hio, send, ncomp);
|
|
|
|
/*
|
|
* Let's wait for WRITE to finish.
|
|
*/
|
|
mtx_lock(&sync_lock);
|
|
while (!ISSYNCREQDONE(hio))
|
|
cv_wait(&sync_cond, &sync_lock);
|
|
mtx_unlock(&sync_lock);
|
|
|
|
if (hio->hio_errors[ncomp] != 0) {
|
|
pjdlog_error("Unable to write synchronization data: %s.",
|
|
strerror(hio->hio_errors[ncomp]));
|
|
goto free_queue;
|
|
}
|
|
free_queue:
|
|
mtx_lock(&range_lock);
|
|
rangelock_del(range_sync, offset, length);
|
|
if (range_regular_wait)
|
|
cv_signal(&range_regular_cond);
|
|
mtx_unlock(&range_lock);
|
|
|
|
synced += length;
|
|
|
|
pjdlog_debug(2, "sync: (%p) Moving request to the free queue.",
|
|
hio);
|
|
QUEUE_INSERT2(hio, free);
|
|
}
|
|
/* NOTREACHED */
|
|
return (NULL);
|
|
}
|
|
|
|
static void
|
|
sighandler(int sig)
|
|
{
|
|
bool unlock;
|
|
|
|
switch (sig) {
|
|
case SIGINT:
|
|
case SIGTERM:
|
|
sigexit_received = true;
|
|
break;
|
|
default:
|
|
assert(!"invalid condition");
|
|
}
|
|
/*
|
|
* XXX: Racy, but if we cannot obtain hio_guard_lock here, we don't
|
|
* want to risk deadlock.
|
|
*/
|
|
unlock = mtx_trylock(&hio_guard_lock);
|
|
cv_signal(&hio_guard_cond);
|
|
if (unlock)
|
|
mtx_unlock(&hio_guard_lock);
|
|
}
|
|
|
|
/*
|
|
* Thread guards remote connections and reconnects when needed, handles
|
|
* signals, etc.
|
|
*/
|
|
static void *
|
|
guard_thread(void *arg)
|
|
{
|
|
struct hast_resource *res = arg;
|
|
struct proto_conn *in, *out;
|
|
unsigned int ii, ncomps;
|
|
int timeout;
|
|
|
|
ncomps = HAST_NCOMPONENTS;
|
|
/* The is only one remote component for now. */
|
|
#define ISREMOTE(no) ((no) == 1)
|
|
|
|
for (;;) {
|
|
if (sigexit_received) {
|
|
primary_exitx(EX_OK,
|
|
"Termination signal received, exiting.");
|
|
}
|
|
/*
|
|
* If all the connection will be fine, we will sleep until
|
|
* someone wakes us up.
|
|
* If any of the connections will be broken and we won't be
|
|
* able to connect, we will sleep only for RECONNECT_SLEEP
|
|
* seconds so we can retry soon.
|
|
*/
|
|
timeout = 0;
|
|
pjdlog_debug(2, "remote_guard: Checking connections.");
|
|
mtx_lock(&hio_guard_lock);
|
|
for (ii = 0; ii < ncomps; ii++) {
|
|
if (!ISREMOTE(ii))
|
|
continue;
|
|
rw_rlock(&hio_remote_lock[ii]);
|
|
if (ISCONNECTED(res, ii)) {
|
|
assert(res->hr_remotein != NULL);
|
|
assert(res->hr_remoteout != NULL);
|
|
rw_unlock(&hio_remote_lock[ii]);
|
|
pjdlog_debug(2,
|
|
"remote_guard: Connection to %s is ok.",
|
|
res->hr_remoteaddr);
|
|
} else {
|
|
assert(res->hr_remotein == NULL);
|
|
assert(res->hr_remoteout == NULL);
|
|
/*
|
|
* Upgrade the lock. It doesn't have to be
|
|
* atomic as no other thread can change
|
|
* connection status from disconnected to
|
|
* connected.
|
|
*/
|
|
rw_unlock(&hio_remote_lock[ii]);
|
|
pjdlog_debug(2,
|
|
"remote_guard: Reconnecting to %s.",
|
|
res->hr_remoteaddr);
|
|
in = out = NULL;
|
|
if (init_remote(res, &in, &out)) {
|
|
rw_wlock(&hio_remote_lock[ii]);
|
|
assert(res->hr_remotein == NULL);
|
|
assert(res->hr_remoteout == NULL);
|
|
assert(in != NULL && out != NULL);
|
|
res->hr_remotein = in;
|
|
res->hr_remoteout = out;
|
|
rw_unlock(&hio_remote_lock[ii]);
|
|
pjdlog_info("Successfully reconnected to %s.",
|
|
res->hr_remoteaddr);
|
|
sync_start();
|
|
} else {
|
|
/* Both connections should be NULL. */
|
|
assert(res->hr_remotein == NULL);
|
|
assert(res->hr_remoteout == NULL);
|
|
assert(in == NULL && out == NULL);
|
|
pjdlog_debug(2,
|
|
"remote_guard: Reconnect to %s failed.",
|
|
res->hr_remoteaddr);
|
|
timeout = RECONNECT_SLEEP;
|
|
}
|
|
}
|
|
}
|
|
(void)cv_timedwait(&hio_guard_cond, &hio_guard_lock, timeout);
|
|
mtx_unlock(&hio_guard_lock);
|
|
}
|
|
#undef ISREMOTE
|
|
/* NOTREACHED */
|
|
return (NULL);
|
|
}
|