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348b4e254b
This gets rid of another stat() per volume, as well as cutting bytes read in half, when populating the volumes of a directory pool during a pool refresh. Not to mention that it provides an interface that can let gluster pools also probe file types. * src/util/virstoragefile.h (virStorageFileProbeFormatFromFD): Delete. (virStorageFileProbeFormatFromBuf): New prototype. (VIR_STORAGE_MAX_HEADER): New constant, based on... * src/util/virstoragefile.c (STORAGE_MAX_HEAD): ...old name. (vmdk4GetBackingStore, virStorageFileGetMetadataInternal) (virStorageFileProbeFormat): Adjust clients. (virStorageFileProbeFormatFromFD): Delete. (virStorageFileProbeFormatFromBuf): Export. * src/storage/storage_backend_fs.c (virStorageBackendProbeTarget): Adjust client. * src/libvirt_private.syms (virstoragefile.h): Adjust exports. Signed-off-by: Eric Blake <eblake@redhat.com>
142 lines
5.2 KiB
C
142 lines
5.2 KiB
C
/*
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* virstoragefile.h: file utility functions for FS storage backend
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*
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* Copyright (C) 2007-2009, 2012-2013 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_FILE_H__
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# define __VIR_STORAGE_FILE_H__
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# include "virbitmap.h"
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# include "virutil.h"
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/* Minimum header size required to probe all known formats with
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* virStorageFileProbeFormat, or obtain metadata from a known format.
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* Rounded to multiple of 512 (ISO has a 5-byte magic at offset
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* 32769). Some formats can be probed with fewer bytes. Although
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* some formats theoretically permit metadata that can rely on offsets
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* beyond this size, in practice that doesn't matter. */
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# define VIR_STORAGE_MAX_HEADER 0x8200
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enum virStorageFileFormat {
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VIR_STORAGE_FILE_AUTO_SAFE = -2,
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VIR_STORAGE_FILE_AUTO = -1,
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VIR_STORAGE_FILE_NONE = 0,
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VIR_STORAGE_FILE_RAW,
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VIR_STORAGE_FILE_DIR,
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VIR_STORAGE_FILE_BOCHS,
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VIR_STORAGE_FILE_CLOOP,
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VIR_STORAGE_FILE_COW,
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VIR_STORAGE_FILE_DMG,
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VIR_STORAGE_FILE_ISO,
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VIR_STORAGE_FILE_QCOW,
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VIR_STORAGE_FILE_QCOW2,
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VIR_STORAGE_FILE_QED,
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VIR_STORAGE_FILE_VMDK,
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VIR_STORAGE_FILE_VPC,
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VIR_STORAGE_FILE_FAT,
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VIR_STORAGE_FILE_VHD,
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VIR_STORAGE_FILE_VDI,
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VIR_STORAGE_FILE_LAST,
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};
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VIR_ENUM_DECL(virStorageFileFormat);
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enum virStorageFileFeature {
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VIR_STORAGE_FILE_FEATURE_LAZY_REFCOUNTS = 0,
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VIR_STORAGE_FILE_FEATURE_LAST
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};
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VIR_ENUM_DECL(virStorageFileFeature);
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typedef struct _virStorageFileMetadata virStorageFileMetadata;
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typedef virStorageFileMetadata *virStorageFileMetadataPtr;
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struct _virStorageFileMetadata {
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char *backingStore; /* Canonical name (absolute file, or protocol) */
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char *backingStoreRaw; /* If file, original name, possibly relative */
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char *directory; /* The directory containing basename of backingStoreRaw */
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int backingStoreFormat; /* enum virStorageFileFormat */
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bool backingStoreIsFile;
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virStorageFileMetadataPtr backingMeta;
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unsigned long long capacity;
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bool encrypted;
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virBitmapPtr features; /* bits described by enum virStorageFileFeature */
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char *compat;
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};
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# ifndef DEV_BSIZE
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# define DEV_BSIZE 512
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# endif
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int virStorageFileProbeFormat(const char *path, uid_t uid, gid_t gid);
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int virStorageFileProbeFormatFromBuf(const char *path, char *buf,
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size_t buflen);
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virStorageFileMetadataPtr virStorageFileGetMetadata(const char *path,
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int format,
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uid_t uid, gid_t gid,
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bool allow_probe);
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virStorageFileMetadataPtr virStorageFileGetMetadataFromFD(const char *path,
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int fd,
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int format);
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virStorageFileMetadataPtr virStorageFileGetMetadataFromBuf(const char *path,
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char *buf,
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size_t len,
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int format);
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int virStorageFileChainGetBroken(virStorageFileMetadataPtr chain,
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char **broken_file);
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const char *virStorageFileChainLookup(virStorageFileMetadataPtr chain,
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const char *start,
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const char *name,
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virStorageFileMetadataPtr *meta,
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const char **parent)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
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void virStorageFileFreeMetadata(virStorageFileMetadataPtr meta);
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int virStorageFileResize(const char *path,
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unsigned long long capacity,
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unsigned long long orig_capacity,
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bool pre_allocate);
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enum {
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VIR_STORAGE_FILE_SHFS_NFS = (1 << 0),
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VIR_STORAGE_FILE_SHFS_GFS2 = (1 << 1),
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VIR_STORAGE_FILE_SHFS_OCFS = (1 << 2),
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VIR_STORAGE_FILE_SHFS_AFS = (1 << 3),
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VIR_STORAGE_FILE_SHFS_SMB = (1 << 4),
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VIR_STORAGE_FILE_SHFS_CIFS = (1 << 5),
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};
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int virStorageFileIsSharedFS(const char *path);
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int virStorageFileIsClusterFS(const char *path);
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int virStorageFileIsSharedFSType(const char *path,
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int fstypes);
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int virStorageFileGetLVMKey(const char *path,
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char **key);
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int virStorageFileGetSCSIKey(const char *path,
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char **key);
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#endif /* __VIR_STORAGE_FILE_H__ */
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