1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2005 Ivan Voras <ivoras@gmail.com> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _G_VIRSTOR_MD_H_ 32 #define _G_VIRSTOR_MD_H_ 33 34 /* 35 * Metadata declaration 36 */ 37 38 #define G_VIRSTOR_MAGIC "GEOM::VIRSTOR" 39 #define G_VIRSTOR_VERSION 1 40 41 /* flag: provider is allocated */ 42 #define VIRSTOR_PROVIDER_ALLOCATED 1 43 /* flag: provider is currently being filled (usually it's the last 44 * provider with VIRSTOR_PROVIDER_ALLOCATED flag */ 45 #define VIRSTOR_PROVIDER_CURRENT 2 46 47 struct g_virstor_metadata { 48 /* Data global to the virstor device */ 49 char md_magic[16]; /* Magic value. */ 50 uint32_t md_version; /* Version number. */ 51 char md_name[16]; /* Device name (e.g. "mydata") */ 52 uint32_t md_id; /* Unique ID. */ 53 uint64_t md_virsize; /* Virtual device's size */ 54 uint32_t md_chunk_size; /* Chunk size in bytes */ 55 uint16_t md_count; /* Total number of providers */ 56 57 /* Data local to this provider */ 58 char provider[16]; /* Hardcoded provider name */ 59 uint16_t no; /* Provider number/index */ 60 uint64_t provsize; /* Provider's size */ 61 uint32_t chunk_count; /* Number of chunks in this pr. */ 62 uint32_t chunk_next; /* Next chunk to allocate */ 63 uint16_t chunk_reserved; /* Count of "reserved" chunks */ 64 uint16_t flags; /* Provider's flags */ 65 }; 66 67 void virstor_metadata_encode(struct g_virstor_metadata *md, unsigned char *data); 68 void virstor_metadata_decode(unsigned char *data, struct g_virstor_metadata *md); 69 70 #endif /* !_G_VIRSTOR_H_ */ 71