1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org> 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_STRIPE_H_ 32 #define _G_STRIPE_H_ 33 34 #include <sys/endian.h> 35 36 #define G_STRIPE_CLASS_NAME "STRIPE" 37 38 #define G_STRIPE_MAGIC "GEOM::STRIPE" 39 /* 40 * Version history: 41 * 0 - Initial version number. 42 * 1 - Added 'stop' command for gstripe(8). 43 * 2 - Added md_provider field to metadata and '-h' option for gstripe(8). 44 * 3 - Added md_provsize field to metadata. 45 */ 46 #define G_STRIPE_VERSION 3 47 48 #ifdef _KERNEL 49 #define G_STRIPE_TYPE_MANUAL 0 50 #define G_STRIPE_TYPE_AUTOMATIC 1 51 52 #define G_STRIPE_DEBUG(lvl, ...) do { \ 53 if (g_stripe_debug >= (lvl)) { \ 54 printf("GEOM_STRIPE"); \ 55 if (g_stripe_debug > 0) \ 56 printf("[%u]", lvl); \ 57 printf(": "); \ 58 printf(__VA_ARGS__); \ 59 printf("\n"); \ 60 } \ 61 } while (0) 62 #define G_STRIPE_LOGREQ(bp, ...) do { \ 63 if (g_stripe_debug >= 2) { \ 64 printf("GEOM_STRIPE[2]: "); \ 65 printf(__VA_ARGS__); \ 66 printf(" "); \ 67 g_print_bio(bp); \ 68 printf("\n"); \ 69 } \ 70 } while (0) 71 72 struct g_stripe_softc { 73 u_int sc_type; /* provider type */ 74 struct g_geom *sc_geom; 75 struct g_provider *sc_provider; 76 uint32_t sc_id; /* stripe unique ID */ 77 struct g_consumer **sc_disks; 78 uint16_t sc_ndisks; 79 off_t sc_stripesize; 80 uint32_t sc_stripebits; 81 struct mtx sc_lock; 82 }; 83 #define sc_name sc_geom->name 84 #endif /* _KERNEL */ 85 86 struct g_stripe_metadata { 87 char md_magic[16]; /* Magic value. */ 88 uint32_t md_version; /* Version number. */ 89 char md_name[16]; /* Stripe name. */ 90 uint32_t md_id; /* Unique ID. */ 91 uint16_t md_no; /* Disk number. */ 92 uint16_t md_all; /* Number of all disks. */ 93 uint32_t md_stripesize; /* Stripe size. */ 94 char md_provider[16]; /* Hardcoded provider. */ 95 uint64_t md_provsize; /* Provider's size. */ 96 }; 97 static __inline void 98 stripe_metadata_encode(const struct g_stripe_metadata *md, u_char *data) 99 { 100 101 bcopy(md->md_magic, data, sizeof(md->md_magic)); 102 le32enc(data + 16, md->md_version); 103 bcopy(md->md_name, data + 20, sizeof(md->md_name)); 104 le32enc(data + 36, md->md_id); 105 le16enc(data + 40, md->md_no); 106 le16enc(data + 42, md->md_all); 107 le32enc(data + 44, md->md_stripesize); 108 bcopy(md->md_provider, data + 48, sizeof(md->md_provider)); 109 le64enc(data + 64, md->md_provsize); 110 } 111 static __inline void 112 stripe_metadata_decode(const u_char *data, struct g_stripe_metadata *md) 113 { 114 115 bcopy(data, md->md_magic, sizeof(md->md_magic)); 116 md->md_version = le32dec(data + 16); 117 bcopy(data + 20, md->md_name, sizeof(md->md_name)); 118 md->md_id = le32dec(data + 36); 119 md->md_no = le16dec(data + 40); 120 md->md_all = le16dec(data + 42); 121 md->md_stripesize = le32dec(data + 44); 122 bcopy(data + 48, md->md_provider, sizeof(md->md_provider)); 123 md->md_provsize = le64dec(data + 64); 124 } 125 126 #endif /* _G_STRIPE_H_ */ 127