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