1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 29 #ifndef _G_VIRSTOR_MD_H_ 30 #define _G_VIRSTOR_MD_H_ 31 32 /* 33 * Metadata declaration 34 */ 35 36 #define G_VIRSTOR_MAGIC "GEOM::VIRSTOR" 37 #define G_VIRSTOR_VERSION 1 38 39 /* flag: provider is allocated */ 40 #define VIRSTOR_PROVIDER_ALLOCATED 1 41 /* flag: provider is currently being filled (usually it's the last 42 * provider with VIRSTOR_PROVIDER_ALLOCATED flag */ 43 #define VIRSTOR_PROVIDER_CURRENT 2 44 45 struct g_virstor_metadata { 46 /* Data global to the virstor device */ 47 char md_magic[16]; /* Magic value. */ 48 uint32_t md_version; /* Version number. */ 49 char md_name[16]; /* Device name (e.g. "mydata") */ 50 uint32_t md_id; /* Unique ID. */ 51 uint64_t md_virsize; /* Virtual device's size */ 52 uint32_t md_chunk_size; /* Chunk size in bytes */ 53 uint16_t md_count; /* Total number of providers */ 54 55 /* Data local to this provider */ 56 char provider[16]; /* Hardcoded provider name */ 57 uint16_t no; /* Provider number/index */ 58 uint64_t provsize; /* Provider's size */ 59 uint32_t chunk_count; /* Number of chunks in this pr. */ 60 uint32_t chunk_next; /* Next chunk to allocate */ 61 uint16_t chunk_reserved; /* Count of "reserved" chunks */ 62 uint16_t flags; /* Provider's flags */ 63 }; 64 65 void virstor_metadata_encode(struct g_virstor_metadata *md, unsigned char *data); 66 void virstor_metadata_decode(unsigned char *data, struct g_virstor_metadata *md); 67 68 #endif /* !_G_VIRSTOR_H_ */ 69