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providers with limited physical storage and add physical storage as needed. Submitted by: Ivan Voras Sponsored by: Google Summer of Code 2006 Approved by: re (kensmith)
70 lines
2.7 KiB
C
70 lines
2.7 KiB
C
/*-
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* Copyright (c) 2005 Ivan Voras <ivoras@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _G_VIRSTOR_MD_H_
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#define _G_VIRSTOR_MD_H_
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/*
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* Metadata declaration
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*/
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#define G_VIRSTOR_MAGIC "GEOM::VIRSTOR"
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#define G_VIRSTOR_VERSION 1
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/* flag: provider is allocated */
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#define VIRSTOR_PROVIDER_ALLOCATED 1
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/* flag: provider is currently being filled (usually it's the last
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* provider with VIRSTOR_PROVIDER_ALLOCATED flag */
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#define VIRSTOR_PROVIDER_CURRENT 2
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struct g_virstor_metadata {
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/* Data global to the virstor device */
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char md_magic[16]; /* Magic value. */
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uint32_t md_version; /* Version number. */
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char md_name[16]; /* Device name (e.g. "mydata") */
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uint32_t md_id; /* Unique ID. */
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uint64_t md_virsize; /* Virtual device's size */
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uint32_t md_chunk_size; /* Chunk size in bytes */
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uint16_t md_count; /* Total number of providers */
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/* Data local to this provider */
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char provider[16]; /* Hardcoded provider name */
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uint16_t no; /* Provider number/index */
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uint64_t provsize; /* Provider's size */
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uint32_t chunk_count; /* Number of chunks in this pr. */
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uint32_t chunk_next; /* Next chunk to allocate */
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uint16_t chunk_reserved; /* Count of "reserved" chunks */
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uint16_t flags; /* Provider's flags */
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};
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void virstor_metadata_encode(struct g_virstor_metadata *md, unsigned char *data);
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void virstor_metadata_decode(unsigned char *data, struct g_virstor_metadata *md);
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#endif /* !_G_VIRSTOR_H_ */
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