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/*
* storage_backend.c: internal storage driver backend contract
*
* Copyright (C) 2007-2016 Red Hat, Inc.
* Copyright (C) 2007-2008 Daniel P. Berrange
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <sys/stat.h>
#include "virerror.h"
#include "internal.h"
#include "storage_backend.h"
#include "virlog.h"
#include "virmodule.h"
#include "virfile.h"
#include "configmake.h"
#if WITH_STORAGE_LVM
# include "storage_backend_logical.h"
#endif
#if WITH_STORAGE_ISCSI
# include "storage_backend_iscsi.h"
#endif
#if WITH_STORAGE_ISCSI_DIRECT
# include "storage_backend_iscsi_direct.h"
#endif
#if WITH_STORAGE_SCSI
# include "storage_backend_scsi.h"
#endif
#if WITH_STORAGE_MPATH
# include "storage_backend_mpath.h"
#endif
#if WITH_STORAGE_DISK
# include "storage_backend_disk.h"
#endif
#if WITH_STORAGE_DIR
# include "storage_backend_fs.h"
#endif
#if WITH_STORAGE_RBD
# include "storage_backend_rbd.h"
#endif
#if WITH_STORAGE_GLUSTER
# include "storage_backend_gluster.h"
#endif
#if WITH_STORAGE_ZFS
# include "storage_backend_zfs.h"
#endif
#if WITH_STORAGE_VSTORAGE
# include "storage_backend_vstorage.h"
#endif
#define VIR_FROM_THIS VIR_FROM_STORAGE
VIR_LOG_INIT("storage.storage_backend");
#define VIR_STORAGE_BACKENDS_MAX 20
static virStorageBackend *virStorageBackends[VIR_STORAGE_BACKENDS_MAX];
static size_t virStorageBackendsCount;
#define STORAGE_BACKEND_MODULE_DIR LIBDIR "/libvirt/storage-backend"
static int
virStorageDriverLoadBackendModule(const char *name,
const char *regfunc,
bool forceload)
{
g_autofree char *modfile = NULL;
if (!(modfile = virFileFindResourceFull(name,
"libvirt_storage_backend_",
VIR_FILE_MODULE_EXT,
abs_top_builddir "/src",
STORAGE_BACKEND_MODULE_DIR,
"LIBVIRT_STORAGE_BACKEND_DIR")))
return -1;
return virModuleLoad(modfile, regfunc, forceload);
}
#define VIR_STORAGE_BACKEND_REGISTER(func, module) \
if (virStorageDriverLoadBackendModule(module, #func, allbackends) < 0) \
return -1
int
virStorageBackendDriversRegister(bool allbackends G_GNUC_UNUSED)
{
#if WITH_STORAGE_DIR || WITH_STORAGE_FS
VIR_STORAGE_BACKEND_REGISTER(virStorageBackendFsRegister, "fs");
#endif
#if WITH_STORAGE_LVM
VIR_STORAGE_BACKEND_REGISTER(virStorageBackendLogicalRegister, "logical");
#endif
#if WITH_STORAGE_ISCSI
VIR_STORAGE_BACKEND_REGISTER(virStorageBackendISCSIRegister, "iscsi");
#endif
#if WITH_STORAGE_ISCSI_DIRECT
VIR_STORAGE_BACKEND_REGISTER(virStorageBackendISCSIDirectRegister, "iscsi-direct");
#endif
#if WITH_STORAGE_SCSI
VIR_STORAGE_BACKEND_REGISTER(virStorageBackendSCSIRegister, "scsi");
#endif
#if WITH_STORAGE_MPATH
VIR_STORAGE_BACKEND_REGISTER(virStorageBackendMpathRegister, "mpath");
#endif
#if WITH_STORAGE_DISK
VIR_STORAGE_BACKEND_REGISTER(virStorageBackendDiskRegister, "disk");
#endif
#if WITH_STORAGE_RBD
VIR_STORAGE_BACKEND_REGISTER(virStorageBackendRBDRegister, "rbd");
#endif
#if WITH_STORAGE_GLUSTER
VIR_STORAGE_BACKEND_REGISTER(virStorageBackendGlusterRegister, "gluster");
#endif
#if WITH_STORAGE_ZFS
VIR_STORAGE_BACKEND_REGISTER(virStorageBackendZFSRegister, "zfs");
#endif
#if WITH_STORAGE_VSTORAGE
VIR_STORAGE_BACKEND_REGISTER(virStorageBackendVstorageRegister, "vstorage");
#endif
return 0;
}
#undef VIR_STORAGE_BACKEND_REGISTER
int
virStorageBackendRegister(virStorageBackend *backend)
{
VIR_DEBUG("Registering storage backend '%s'",
virStoragePoolTypeToString(backend->type));
if (virStorageBackendsCount >= VIR_STORAGE_BACKENDS_MAX) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Too many drivers, cannot register storage backend '%1$s'"),
virStoragePoolTypeToString(backend->type));
return -1;
}
virStorageBackends[virStorageBackendsCount] = backend;
virStorageBackendsCount++;
return 0;
}
virStorageBackend *
virStorageBackendForType(int type)
{
size_t i;
for (i = 0; i < virStorageBackendsCount; i++)
if (virStorageBackends[i]->type == type)
return virStorageBackends[i];
virReportError(VIR_ERR_INTERNAL_ERROR,
_("missing backend for pool type %1$d (%2$s)"),
type, NULLSTR(virStoragePoolTypeToString(type)));
return NULL;
}
virCaps *
virStorageBackendGetCapabilities(void)
{
virCaps *caps;
size_t i;
if (!(caps = virCapabilitiesNew(VIR_ARCH_NONE, false, false)))
return NULL;
for (i = 0; i < virStorageBackendsCount; i++)
virCapabilitiesAddStoragePool(caps, virStorageBackends[i]->type);
return caps;
}
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