1 /*- 2 * Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org> 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 #ifndef _G_STRIPE_H_ 30 #define _G_STRIPE_H_ 31 32 #include <sys/endian.h> 33 34 #define G_STRIPE_CLASS_NAME "STRIPE" 35 36 #define G_STRIPE_MAGIC "GEOM::STRIPE" 37 /* 38 * Version history: 39 * 0 - Initial version number. 40 * 1 - Added 'stop' command for gstripe(8). 41 * 2 - Added md_provider field to metadata and '-h' option for gstripe(8). 42 * 3 - Added md_provsize field to metadata. 43 */ 44 #define G_STRIPE_VERSION 3 45 46 #ifdef _KERNEL 47 #define G_STRIPE_TYPE_MANUAL 0 48 #define G_STRIPE_TYPE_AUTOMATIC 1 49 50 #define G_STRIPE_DEBUG(lvl, ...) do { \ 51 if (g_stripe_debug >= (lvl)) { \ 52 printf("GEOM_STRIPE"); \ 53 if (g_stripe_debug > 0) \ 54 printf("[%u]", lvl); \ 55 printf(": "); \ 56 printf(__VA_ARGS__); \ 57 printf("\n"); \ 58 } \ 59 } while (0) 60 #define G_STRIPE_LOGREQ(bp, ...) do { \ 61 if (g_stripe_debug >= 2) { \ 62 printf("GEOM_STRIPE[2]: "); \ 63 printf(__VA_ARGS__); \ 64 printf(" "); \ 65 g_print_bio(bp); \ 66 printf("\n"); \ 67 } \ 68 } while (0) 69 70 struct g_stripe_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; /* stripe unique ID */ 75 struct g_consumer **sc_disks; 76 uint16_t sc_ndisks; 77 uint32_t sc_stripesize; 78 uint32_t sc_stripebits; 79 }; 80 #define sc_name sc_geom->name 81 #endif /* _KERNEL */ 82 83 struct g_stripe_metadata { 84 char md_magic[16]; /* Magic value. */ 85 uint32_t md_version; /* Version number. */ 86 char md_name[16]; /* Stripe name. */ 87 uint32_t md_id; /* Unique ID. */ 88 uint16_t md_no; /* Disk number. */ 89 uint16_t md_all; /* Number of all disks. */ 90 uint32_t md_stripesize; /* Stripe size. */ 91 char md_provider[16]; /* Hardcoded provider. */ 92 uint64_t md_provsize; /* Provider's size. */ 93 }; 94 static __inline void 95 stripe_metadata_encode(const struct g_stripe_metadata *md, u_char *data) 96 { 97 98 bcopy(md->md_magic, data, sizeof(md->md_magic)); 99 le32enc(data + 16, md->md_version); 100 bcopy(md->md_name, data + 20, sizeof(md->md_name)); 101 le32enc(data + 36, md->md_id); 102 le16enc(data + 40, md->md_no); 103 le16enc(data + 42, md->md_all); 104 le32enc(data + 44, md->md_stripesize); 105 bcopy(md->md_provider, data + 48, sizeof(md->md_provider)); 106 le64enc(data + 64, md->md_provsize); 107 } 108 static __inline void 109 stripe_metadata_decode(const u_char *data, struct g_stripe_metadata *md) 110 { 111 112 bcopy(data, md->md_magic, sizeof(md->md_magic)); 113 md->md_version = le32dec(data + 16); 114 bcopy(data + 20, md->md_name, sizeof(md->md_name)); 115 md->md_id = le32dec(data + 36); 116 md->md_no = le16dec(data + 40); 117 md->md_all = le16dec(data + 42); 118 md->md_stripesize = le32dec(data + 44); 119 bcopy(data + 48, md->md_provider, sizeof(md->md_provider)); 120 md->md_provsize = le64dec(data + 64); 121 } 122 123 #endif /* _G_STRIPE_H_ */ 124