g_shsec.h revision 259065
150477Speter/*- 22996Spst * Copyright (c) 2005 Pawel Jakub Dawidek <pjd@FreeBSD.org> 317914Speter * All rights reserved. 417914Speter * 535641Speter * Redistribution and use in source and binary forms, with or without 635641Speter * modification, are permitted provided that the following conditions 717914Speter * are met: 82996Spst * 1. Redistributions of source code must retain the above copyright 92996Spst * notice, this list of conditions and the following disclaimer. 102996Spst * 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: releng/10.0/sys/geom/shsec/g_shsec.h 155174 2006-02-01 12:06:01Z pjd $ 27 */ 28 29#ifndef _G_SHSEC_H_ 30#define _G_SHSEC_H_ 31 32#include <sys/endian.h> 33 34#define G_SHSEC_CLASS_NAME "SHSEC" 35 36#define G_SHSEC_MAGIC "GEOM::SHSEC" 37/* 38 * Version history: 39 * 0 - Initial version number. 40 * 1 - Added md_provsize field to metadata. 41 */ 42#define G_SHSEC_VERSION 1 43 44#ifdef _KERNEL 45#define G_SHSEC_BFLAG_FIRST 0x1 46 47#define G_SHSEC_DEBUG(lvl, ...) do { \ 48 if (g_shsec_debug >= (lvl)) { \ 49 printf("GEOM_SHSEC"); \ 50 if (g_shsec_debug > 0) \ 51 printf("[%u]", lvl); \ 52 printf(": "); \ 53 printf(__VA_ARGS__); \ 54 printf("\n"); \ 55 } \ 56} while (0) 57#define G_SHSEC_LOGREQ(lvl, bp, ...) do { \ 58 if (g_shsec_debug >= (lvl)) { \ 59 printf("GEOM_SHSEC"); \ 60 if (g_shsec_debug > 0) \ 61 printf("[%u]", lvl); \ 62 printf(": "); \ 63 printf(__VA_ARGS__); \ 64 printf(" "); \ 65 g_print_bio(bp); \ 66 printf("\n"); \ 67 } \ 68} while (0) 69 70struct g_shsec_softc { 71 u_int sc_type; /* provider type */ 72 struct g_geom *sc_geom; 73 struct g_provider *sc_provider; 74 uint32_t sc_id; /* device unique ID */ 75 struct g_consumer **sc_disks; 76 uint16_t sc_ndisks; 77}; 78#define sc_name sc_geom->name 79#endif /* _KERNEL */ 80 81struct g_shsec_metadata { 82 char md_magic[16]; /* Magic value. */ 83 uint32_t md_version; /* Version number. */ 84 char md_name[16]; /* Stripe name. */ 85 uint32_t md_id; /* Unique ID. */ 86 uint16_t md_no; /* Disk number. */ 87 uint16_t md_all; /* Number of all disks. */ 88 char md_provider[16]; /* Hardcoded provider. */ 89 uint64_t md_provsize; /* Provider's size. */ 90}; 91static __inline void 92shsec_metadata_encode(const struct g_shsec_metadata *md, u_char *data) 93{ 94 95 bcopy(md->md_magic, data, sizeof(md->md_magic)); 96 le32enc(data + 16, md->md_version); 97 bcopy(md->md_name, data + 20, sizeof(md->md_name)); 98 le32enc(data + 36, md->md_id); 99 le16enc(data + 40, md->md_no); 100 le16enc(data + 42, md->md_all); 101 bcopy(md->md_provider, data + 44, sizeof(md->md_provider)); 102 le64enc(data + 60, md->md_provsize); 103} 104static __inline void 105shsec_metadata_decode(const u_char *data, struct g_shsec_metadata *md) 106{ 107 108 bcopy(data, md->md_magic, sizeof(md->md_magic)); 109 md->md_version = le32dec(data + 16); 110 bcopy(data + 20, md->md_name, sizeof(md->md_name)); 111 md->md_id = le32dec(data + 36); 112 md->md_no = le16dec(data + 40); 113 md->md_all = le16dec(data + 42); 114 bcopy(data + 44, md->md_provider, sizeof(md->md_provider)); 115 md->md_provsize = le64dec(data + 60); 116} 117#endif /* _G_SHSEC_H_ */ 118