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 #define G_STRIPE_VERSION 1 38 39 #ifdef _KERNEL 40 #define G_STRIPE_TYPE_MANUAL 0 41 #define G_STRIPE_TYPE_AUTOMATIC 1 42 43 #define G_STRIPE_DEBUG(lvl, ...) do { \ 44 if (g_stripe_debug >= (lvl)) { \ 45 printf("GEOM_STRIPE"); \ 46 if (g_stripe_debug > 0) \ 47 printf("[%u]", lvl); \ 48 printf(": "); \ 49 printf(__VA_ARGS__); \ 50 printf("\n"); \ 51 } \ 52 } while (0) 53 #define G_STRIPE_LOGREQ(bp, ...) do { \ 54 if (g_stripe_debug >= 2) { \ 55 printf("GEOM_STRIPE[2]: "); \ 56 printf(__VA_ARGS__); \ 57 printf(" "); \ 58 g_print_bio(bp); \ 59 printf("\n"); \ 60 } \ 61 } while (0) 62 63 struct g_stripe_softc { 64 u_int sc_type; /* provider type */ 65 struct g_geom *sc_geom; 66 struct g_provider *sc_provider; 67 uint32_t sc_id; /* stripe unique ID */ 68 struct g_consumer **sc_disks; 69 uint16_t sc_ndisks; 70 uint32_t sc_stripesize; 71 uint32_t sc_stripebits; 72 }; 73 #define sc_name sc_geom->name 74 #endif /* _KERNEL */ 75 76 struct g_stripe_metadata { 77 char md_magic[16]; /* Magic value. */ 78 uint32_t md_version; /* Version number. */ 79 char md_name[16]; /* Stripe name. */ 80 uint32_t md_id; /* Unique ID. */ 81 uint16_t md_no; /* Disk number. */ 82 uint16_t md_all; /* Number of all disks. */ 83 uint32_t md_stripesize; /* Stripe size. */ 84 }; 85 static __inline void 86 stripe_metadata_encode(const struct g_stripe_metadata *md, u_char *data) 87 { 88 89 bcopy(md->md_magic, data, sizeof(md->md_magic)); 90 le32enc(data + 16, md->md_version); 91 bcopy(md->md_name, data + 20, sizeof(md->md_name)); 92 le32enc(data + 36, md->md_id); 93 le16enc(data + 40, md->md_no); 94 le16enc(data + 42, md->md_all); 95 le32enc(data + 44, md->md_stripesize); 96 } 97 static __inline void 98 stripe_metadata_decode(const u_char *data, struct g_stripe_metadata *md) 99 { 100 101 bcopy(data, md->md_magic, sizeof(md->md_magic)); 102 md->md_version = le32dec(data + 16); 103 bcopy(data + 20, md->md_name, sizeof(md->md_name)); 104 md->md_id = le32dec(data + 36); 105 md->md_no = le16dec(data + 40); 106 md->md_all = le16dec(data + 42); 107 md->md_stripesize = le32dec(data + 44); 108 } 109 110 #ifndef BITCOUNT 111 #define BITCOUNT(x) (((BX_(x) + (BX_(x) >> 4)) & 0x0F0F0F0F) % 255) 112 #define BX_(x) ((x) - (((x) >> 1) & 0x77777777) - \ 113 (((x) >> 2) & 0x33333333) - (((x) >> 3) & 0x11111111)) 114 #endif 115 116 #endif /* _G_STRIPE_H_ */ 117