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af36f8a641
Missing semicolon at the end of macros can confuse some analyzers (like cppcheck <filename>). VIR_ONCE_GLOBAL_INIT is almost exclusively called without an ending semicolon, but let's standardize on using one like the other macros. Add a dummy struct definition at the end of the macro, so the compiler will require callers to add a semicolon. Reviewed-by: John Ferlan <jferlan@redhat.com> Signed-off-by: Cole Robinson <crobinso@redhat.com>
148 lines
4.5 KiB
C
148 lines
4.5 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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#include <config.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 "virmodule.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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#if WITH_STORAGE_DIR || WITH_STORAGE_FS || WITH_STORAGE_GLUSTER
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# define STORAGE_FILE_MODULE_DIR LIBDIR "/libvirt/storage-file"
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static int
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virStorageFileLoadBackendModule(const char *name,
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const char *regfunc,
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bool forceload)
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{
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char *modfile = NULL;
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int ret;
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if (!(modfile = virFileFindResourceFull(name,
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"libvirt_storage_file_",
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".so",
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abs_topbuilddir "/src/.libs",
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STORAGE_FILE_MODULE_DIR,
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"LIBVIRT_STORAGE_FILE_DIR")))
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return -1;
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ret = virModuleLoad(modfile, regfunc, forceload);
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VIR_FREE(modfile);
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return ret;
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}
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#endif /* WITH_STORAGE_DIR || WITH_STORAGE_FS || WITH_STORAGE_GLUSTER */
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static int virStorageFileBackendOnceInit(void)
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{
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#if WITH_STORAGE_DIR || WITH_STORAGE_FS
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if (virStorageFileLoadBackendModule("fs", "virStorageFileFsRegister", false) < 0)
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return -1;
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#endif /* WITH_STORAGE_DIR || WITH_STORAGE_FS */
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#if WITH_STORAGE_GLUSTER
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if (virStorageFileLoadBackendModule("gluster", "virStorageFileGlusterRegister", false) < 0)
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return -1;
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#endif /* WITH_STORAGE_GLUSTER */
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return 0;
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}
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VIR_ONCE_GLOBAL_INIT(virStorageFileBackend);
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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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int
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virStorageFileBackendForType(int type,
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int protocol,
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bool required,
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virStorageFileBackendPtr *backend)
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{
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size_t i;
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*backend = NULL;
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if (virStorageFileBackendInitialize() < 0)
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return -1;
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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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*backend = virStorageFileBackends[i];
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return 0;
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}
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}
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if (!required)
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return 0;
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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 -1;
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}
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