f854db0bf5
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
/*-
|
|
* 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
|
|
#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_ */
|