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A fairly smooth transition. And now that domain disks and storage volumes share a common struct, it opens the doors for a future patch to expose more details in the XML for both objects. * src/conf/storage_conf.h (_virStorageVolTarget): Delete. (_virStorageVolDef): Use common type. * src/conf/storage_conf.c (virStorageVolDefFree) (virStorageVolTargetDefFormat): Update clients. * src/storage/storage_backend.h: Likewise. * src/storage/storage_backend.c (virStorageBackendDetectBlockVolFormatFD) (virStorageBackendUpdateVolTargetInfo) (virStorageBackendUpdateVolTargetInfoFD): Likewise. * src/storage/storage_backend_fs.c (virStorageBackendProbeTarget): Likewise. Signed-off-by: Eric Blake <eblake@redhat.com>
206 lines
9.0 KiB
C
206 lines
9.0 KiB
C
/*
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* storage_backend.h: internal storage driver backend contract
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*
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* Copyright (C) 2007-2010, 2012-2014 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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#ifndef __VIR_STORAGE_BACKEND_H__
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# define __VIR_STORAGE_BACKEND_H__
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# include <sys/stat.h>
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# include "internal.h"
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# include "storage_conf.h"
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# include "vircommand.h"
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# include "storage_driver.h"
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typedef char * (*virStorageBackendFindPoolSources)(virConnectPtr conn,
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const char *srcSpec,
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unsigned int flags);
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typedef int (*virStorageBackendCheckPool)(virConnectPtr conn,
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virStoragePoolObjPtr pool,
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bool *active);
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typedef int (*virStorageBackendStartPool)(virConnectPtr conn,
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virStoragePoolObjPtr pool);
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typedef int (*virStorageBackendBuildPool)(virConnectPtr conn,
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virStoragePoolObjPtr pool,
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unsigned int flags);
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typedef int (*virStorageBackendRefreshPool)(virConnectPtr conn,
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virStoragePoolObjPtr pool);
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typedef int (*virStorageBackendStopPool)(virConnectPtr conn,
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virStoragePoolObjPtr pool);
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typedef int (*virStorageBackendDeletePool)(virConnectPtr conn,
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virStoragePoolObjPtr pool,
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unsigned int flags);
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typedef int (*virStorageBackendBuildVol)(virConnectPtr conn,
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virStoragePoolObjPtr pool,
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virStorageVolDefPtr vol,
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unsigned int flags);
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typedef int (*virStorageBackendCreateVol)(virConnectPtr conn,
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virStoragePoolObjPtr pool,
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virStorageVolDefPtr vol);
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typedef int (*virStorageBackendRefreshVol)(virConnectPtr conn,
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virStoragePoolObjPtr pool,
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virStorageVolDefPtr vol);
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typedef int (*virStorageBackendDeleteVol)(virConnectPtr conn,
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virStoragePoolObjPtr pool,
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virStorageVolDefPtr vol,
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unsigned int flags);
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typedef int (*virStorageBackendBuildVolFrom)(virConnectPtr conn,
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virStoragePoolObjPtr pool,
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virStorageVolDefPtr origvol,
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virStorageVolDefPtr newvol,
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unsigned int flags);
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typedef int (*virStorageBackendVolumeResize)(virConnectPtr conn,
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virStoragePoolObjPtr pool,
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virStorageVolDefPtr vol,
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unsigned long long capacity,
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unsigned int flags);
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/* File creation/cloning functions used for cloning between backends */
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int virStorageBackendCreateRaw(virConnectPtr conn,
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virStoragePoolObjPtr pool,
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virStorageVolDefPtr vol,
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virStorageVolDefPtr inputvol,
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unsigned int flags);
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virStorageBackendBuildVolFrom
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virStorageBackendGetBuildVolFromFunction(virStorageVolDefPtr vol,
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virStorageVolDefPtr inputvol);
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int virStorageBackendFindFSImageTool(char **tool);
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virStorageBackendBuildVolFrom
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virStorageBackendFSImageToolTypeToFunc(int tool_type);
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int virStorageBackendFindGlusterPoolSources(const char *host,
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int pooltype,
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virStoragePoolSourceListPtr list);
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typedef struct _virStorageBackend virStorageBackend;
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typedef virStorageBackend *virStorageBackendPtr;
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/* Callbacks are optional unless documented otherwise; but adding more
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* callbacks provides better pool support. */
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struct _virStorageBackend {
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int type;
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virStorageBackendFindPoolSources findPoolSources;
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virStorageBackendCheckPool checkPool;
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virStorageBackendStartPool startPool;
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virStorageBackendBuildPool buildPool;
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virStorageBackendRefreshPool refreshPool; /* Must be non-NULL */
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virStorageBackendStopPool stopPool;
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virStorageBackendDeletePool deletePool;
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virStorageBackendBuildVol buildVol;
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virStorageBackendBuildVolFrom buildVolFrom;
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virStorageBackendCreateVol createVol;
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virStorageBackendRefreshVol refreshVol;
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virStorageBackendDeleteVol deleteVol;
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virStorageBackendVolumeResize resizeVol;
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};
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virStorageBackendPtr virStorageBackendForType(int type);
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/* VolOpenCheckMode flags */
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enum {
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VIR_STORAGE_VOL_OPEN_ERROR = 1 << 0, /* warn if unexpected type
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* encountered */
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VIR_STORAGE_VOL_OPEN_REG = 1 << 1, /* regular files okay */
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VIR_STORAGE_VOL_OPEN_BLOCK = 1 << 2, /* block files okay */
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VIR_STORAGE_VOL_OPEN_CHAR = 1 << 3, /* char files okay */
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VIR_STORAGE_VOL_OPEN_DIR = 1 << 4, /* directories okay */
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};
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# define VIR_STORAGE_VOL_OPEN_DEFAULT (VIR_STORAGE_VOL_OPEN_ERROR |\
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VIR_STORAGE_VOL_OPEN_REG |\
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VIR_STORAGE_VOL_OPEN_BLOCK)
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int virStorageBackendVolOpen(const char *path, struct stat *sb,
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unsigned int flags)
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ATTRIBUTE_RETURN_CHECK
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
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int virStorageBackendUpdateVolInfo(virStorageVolDefPtr vol,
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bool withCapacity,
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bool withBlockVolFormat,
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unsigned int openflags);
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int virStorageBackendUpdateVolTargetInfo(virStorageSourcePtr target,
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unsigned long long *allocation,
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unsigned long long *capacity,
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bool withBlockVolFormat,
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unsigned int openflags);
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int virStorageBackendUpdateVolTargetInfoFD(virStorageSourcePtr target,
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int fd,
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struct stat *sb,
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unsigned long long *allocation,
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unsigned long long *capacity);
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char *virStorageBackendStablePath(virStoragePoolObjPtr pool,
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const char *devpath,
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bool loop);
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virCommandPtr
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virStorageBackendCreateQemuImgCmd(virConnectPtr conn,
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virStoragePoolObjPtr pool,
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virStorageVolDefPtr vol,
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virStorageVolDefPtr inputvol,
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unsigned int flags,
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const char *create_tool,
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int imgformat);
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/* ------- virStorageFile backends ------------ */
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typedef int
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(*virStorageFileBackendInit)(virStorageFilePtr file);
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typedef void
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(*virStorageFileBackendDeinit)(virStorageFilePtr file);
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typedef int
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(*virStorageFileBackendCreate)(virStorageFilePtr file);
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typedef int
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(*virStorageFileBackendUnlink)(virStorageFilePtr file);
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typedef int
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(*virStorageFileBackendStat)(virStorageFilePtr file,
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struct stat *st);
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virStorageFileBackendPtr virStorageFileBackendForType(int type, int protocol);
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struct _virStorageFileBackend {
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int type;
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int protocol;
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/* All storage file callbacks may be omitted if not implemented */
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/* The following group of callbacks is expected to set a libvirt
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* error on failure. */
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virStorageFileBackendInit backendInit;
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virStorageFileBackendDeinit backendDeinit;
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/* The following group of callbacks is expected to set errno
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* and return -1 on error. No libvirt error shall be reported */
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virStorageFileBackendCreate storageFileCreate;
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virStorageFileBackendUnlink storageFileUnlink;
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virStorageFileBackendStat storageFileStat;
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};
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#endif /* __VIR_STORAGE_BACKEND_H__ */
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