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/*-
* Copyright (c) 2005 Ivan Voras <ivoras@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: release/9.1.0/sys/geom/virstor/g_virstor_md.h 172302 2007-09-23 07:34:23Z pjd $
*/
#ifndef _G_VIRSTOR_MD_H_
#define _G_VIRSTOR_MD_H_
/*
* Metadata declaration
*/
#define G_VIRSTOR_MAGIC "GEOM::VIRSTOR"
#define G_VIRSTOR_VERSION 1
/* flag: provider is allocated */
#define VIRSTOR_PROVIDER_ALLOCATED 1
/* flag: provider is currently being filled (usually it's the last
* provider with VIRSTOR_PROVIDER_ALLOCATED flag */
#define VIRSTOR_PROVIDER_CURRENT 2
struct g_virstor_metadata {
/* Data global to the virstor device */
char md_magic[16]; /* Magic value. */
uint32_t md_version; /* Version number. */
char md_name[16]; /* Device name (e.g. "mydata") */
uint32_t md_id; /* Unique ID. */
uint64_t md_virsize; /* Virtual device's size */
uint32_t md_chunk_size; /* Chunk size in bytes */
uint16_t md_count; /* Total number of providers */
/* Data local to this provider */
char provider[16]; /* Hardcoded provider name */
uint16_t no; /* Provider number/index */
uint64_t provsize; /* Provider's size */
uint32_t chunk_count; /* Number of chunks in this pr. */
uint32_t chunk_next; /* Next chunk to allocate */
uint16_t chunk_reserved; /* Count of "reserved" chunks */
uint16_t flags; /* Provider's flags */
};
void virstor_metadata_encode(struct g_virstor_metadata *md, unsigned char *data);
void virstor_metadata_decode(unsigned char *data, struct g_virstor_metadata *md);
#endif /* !_G_VIRSTOR_H_ */