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The storage file drivers are currently loaded as a side effect of loading the storage driver. This is a bogus dependancy because the storage file code has no interaction with the storage drivers, and even ultimately be running in a completely separate daemon. Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
104 lines
3.3 KiB
C
104 lines
3.3 KiB
C
/*
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* virstoragefilebackend.h: internal storage source backend contract
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*
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* Copyright (C) 2007-2018 Red Hat, Inc.
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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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#ifndef __VIR_STORAGE_FILE_BACKEND_H__
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# define __VIR_STORAGE_FILE_BACKEND_H__
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# include <sys/stat.h>
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# include "virstoragefile.h"
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/* ------- virStorageFile backends ------------ */
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typedef struct _virStorageFileBackend virStorageFileBackend;
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typedef virStorageFileBackend *virStorageFileBackendPtr;
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struct _virStorageDriverData {
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virStorageFileBackendPtr backend;
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void *priv;
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uid_t uid;
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gid_t gid;
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};
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typedef int
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(*virStorageFileBackendInit)(virStorageSourcePtr src);
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typedef void
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(*virStorageFileBackendDeinit)(virStorageSourcePtr src);
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typedef int
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(*virStorageFileBackendCreate)(virStorageSourcePtr src);
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typedef int
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(*virStorageFileBackendUnlink)(virStorageSourcePtr src);
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typedef int
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(*virStorageFileBackendStat)(virStorageSourcePtr src,
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struct stat *st);
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typedef ssize_t
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(*virStorageFileBackendRead)(virStorageSourcePtr src,
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size_t offset,
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size_t len,
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char **buf);
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typedef const char *
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(*virStorageFileBackendGetUniqueIdentifier)(virStorageSourcePtr src);
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typedef int
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(*virStorageFileBackendAccess)(virStorageSourcePtr src,
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int mode);
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typedef int
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(*virStorageFileBackendChown)(const virStorageSource *src,
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uid_t uid,
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gid_t gid);
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int 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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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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virStorageFileBackendRead storageFileRead;
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virStorageFileBackendGetUniqueIdentifier storageFileGetUniqueIdentifier;
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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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virStorageFileBackendAccess storageFileAccess;
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virStorageFileBackendChown storageFileChown;
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};
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int virStorageFileBackendRegister(virStorageFileBackendPtr backend);
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#endif /* __VIR_STORAGE_FILE_BACKEND_H__ */
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