1 /*- 2 * Copyright (c) 2003 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 */ 43 #define G_STRIPE_VERSION 2 44 45 #ifdef _KERNEL 46 #define G_STRIPE_TYPE_MANUAL 0 47 #define G_STRIPE_TYPE_AUTOMATIC 1 48 49 #define G_STRIPE_DEBUG(lvl, ...) do { \ 50 if (g_stripe_debug >= (lvl)) { \ 51 printf("GEOM_STRIPE"); \ 52 if (g_stripe_debug > 0) \ 53 printf("[%u]", lvl); \ 54 printf(": "); \ 55 printf(__VA_ARGS__); \ 56 printf("\n"); \ 57 } \ 58 } while (0) 59 #define G_STRIPE_LOGREQ(bp, ...) do { \ 60 if (g_stripe_debug >= 2) { \ 61 printf("GEOM_STRIPE[2]: "); \ 62 printf(__VA_ARGS__); \ 63 printf(" "); \ 64 g_print_bio(bp); \ 65 printf("\n"); \ 66 } \ 67 } while (0) 68 69 struct g_stripe_softc { 70 u_int sc_type; /* provider type */ 71 struct g_geom *sc_geom; 72 struct g_provider *sc_provider; 73 uint32_t sc_id; /* stripe unique ID */ 74 struct g_consumer **sc_disks; 75 uint16_t sc_ndisks; 76 uint32_t sc_stripesize; 77 uint32_t sc_stripebits; 78 }; 79 #define sc_name sc_geom->name 80 #endif /* _KERNEL */ 81 82 struct g_stripe_metadata { 83 char md_magic[16]; /* Magic value. */ 84 uint32_t md_version; /* Version number. */ 85 char md_name[16]; /* Stripe name. */ 86 uint32_t md_id; /* Unique ID. */ 87 uint16_t md_no; /* Disk number. */ 88 uint16_t md_all; /* Number of all disks. */ 89 uint32_t md_stripesize; /* Stripe size. */ 90 char md_provider[16]; /* Hardcoded provider. */ 91 }; 92 static __inline void 93 stripe_metadata_encode(const struct g_stripe_metadata *md, u_char *data) 94 { 95 96 bcopy(md->md_magic, data, sizeof(md->md_magic)); 97 le32enc(data + 16, md->md_version); 98 bcopy(md->md_name, data + 20, sizeof(md->md_name)); 99 le32enc(data + 36, md->md_id); 100 le16enc(data + 40, md->md_no); 101 le16enc(data + 42, md->md_all); 102 le32enc(data + 44, md->md_stripesize); 103 bcopy(md->md_provider, data + 48, sizeof(md->md_provider)); 104 } 105 static __inline void 106 stripe_metadata_decode(const u_char *data, struct g_stripe_metadata *md) 107 { 108 109 bcopy(data, md->md_magic, sizeof(md->md_magic)); 110 md->md_version = le32dec(data + 16); 111 bcopy(data + 20, md->md_name, sizeof(md->md_name)); 112 md->md_id = le32dec(data + 36); 113 md->md_no = le16dec(data + 40); 114 md->md_all = le16dec(data + 42); 115 md->md_stripesize = le32dec(data + 44); 116 bcopy(data + 48, md->md_provider, sizeof(md->md_provider)); 117 } 118 119 #ifndef BITCOUNT 120 #define BITCOUNT(x) (((BX_(x) + (BX_(x) >> 4)) & 0x0F0F0F0F) % 255) 121 #define BX_(x) ((x) - (((x) >> 1) & 0x77777777) - \ 122 (((x) >> 2) & 0x33333333) - (((x) >> 3) & 0x11111111)) 123 #endif 124 125 #endif /* _G_STRIPE_H_ */ 126