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064fec69be
The QEMU driver loadable module needs to be able to resolve all ELF symbols it references against libvirt.so. Some of its symbols can only be resolved against the storage_driver.so loadable module which creates a hard dependancy between them. By moving the storage file backend framework into the util directory, this gets included directly in the libvirt.so library. The actual backend implementations are still done as loadable modules, so this doesn't re-add deps on gluster libraries. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
109 lines
3.2 KiB
C
109 lines
3.2 KiB
C
/*
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* virstoragefilebackend.c: internal storage source backend contract
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*
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* Copyright (C) 2007-2018 Red Hat, Inc.
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* Copyright (C) 2007-2008 Daniel P. Berrange
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Author: Daniel P. Berrange <berrange@redhat.com>
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*/
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#include <config.h>
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#include <string.h>
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#include <sys/stat.h>
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#include "datatypes.h"
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#include "virerror.h"
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#include "viralloc.h"
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#include "internal.h"
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#include "virstoragefilebackend.h"
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#include "virlog.h"
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#include "virfile.h"
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#include "configmake.h"
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#define VIR_FROM_THIS VIR_FROM_STORAGE
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VIR_LOG_INIT("storage.storage_source_backend");
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#define VIR_STORAGE_BACKENDS_MAX 20
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static virStorageFileBackendPtr virStorageFileBackends[VIR_STORAGE_BACKENDS_MAX];
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static size_t virStorageFileBackendsCount;
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int
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virStorageFileBackendRegister(virStorageFileBackendPtr backend)
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{
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VIR_DEBUG("Registering storage file backend '%s' protocol '%s'",
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virStorageTypeToString(backend->type),
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virStorageNetProtocolTypeToString(backend->protocol));
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if (virStorageFileBackendsCount >= VIR_STORAGE_BACKENDS_MAX) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Too many drivers, cannot register storage file "
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"backend '%s'"),
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virStorageTypeToString(backend->type));
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return -1;
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}
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virStorageFileBackends[virStorageFileBackendsCount] = backend;
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virStorageFileBackendsCount++;
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return 0;
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}
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virStorageFileBackendPtr
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virStorageFileBackendForTypeInternal(int type,
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int protocol,
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bool report)
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{
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size_t i;
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for (i = 0; i < virStorageFileBackendsCount; i++) {
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if (virStorageFileBackends[i]->type == type) {
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if (type == VIR_STORAGE_TYPE_NETWORK &&
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virStorageFileBackends[i]->protocol != protocol)
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continue;
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return virStorageFileBackends[i];
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}
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}
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if (!report)
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return NULL;
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if (type == VIR_STORAGE_TYPE_NETWORK) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("missing storage backend for network files "
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"using %s protocol"),
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virStorageNetProtocolTypeToString(protocol));
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} else {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("missing storage backend for '%s' storage"),
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virStorageTypeToString(type));
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}
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return NULL;
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}
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virStorageFileBackendPtr
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virStorageFileBackendForType(int type,
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int protocol)
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{
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return virStorageFileBackendForTypeInternal(type, protocol, true);
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}
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