1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 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_FLAG_CANDELETE 0x00000001UL 51 52 #define G_STRIPE_DEBUG(lvl, ...) \ 53 _GEOM_DEBUG("GEOM_STRIPE", g_stripe_debug, (lvl), NULL, __VA_ARGS__) 54 #define G_STRIPE_LOGREQ(bp, ...) \ 55 _GEOM_DEBUG("GEOM_STRIPE", g_stripe_debug, 2, (bp), __VA_ARGS__) 56 57 struct g_stripe_softc { 58 u_int sc_type; /* provider type */ 59 struct g_geom *sc_geom; 60 struct g_provider *sc_provider; 61 uint32_t sc_id; /* stripe unique ID */ 62 struct g_consumer **sc_disks; 63 uint16_t sc_ndisks; 64 off_t sc_stripesize; 65 uint32_t sc_stripebits; 66 struct mtx sc_lock; 67 int sc_flags; 68 }; 69 #define sc_name sc_geom->name 70 #endif /* _KERNEL */ 71 72 struct g_stripe_metadata { 73 char md_magic[16]; /* Magic value. */ 74 uint32_t md_version; /* Version number. */ 75 char md_name[16]; /* Stripe name. */ 76 uint32_t md_id; /* Unique ID. */ 77 uint16_t md_no; /* Disk number. */ 78 uint16_t md_all; /* Number of all disks. */ 79 uint32_t md_stripesize; /* Stripe size. */ 80 char md_provider[16]; /* Hardcoded provider. */ 81 uint64_t md_provsize; /* Provider's size. */ 82 }; 83 static __inline void 84 stripe_metadata_encode(const struct g_stripe_metadata *md, u_char *data) 85 { 86 87 bcopy(md->md_magic, data, sizeof(md->md_magic)); 88 le32enc(data + 16, md->md_version); 89 bcopy(md->md_name, data + 20, sizeof(md->md_name)); 90 le32enc(data + 36, md->md_id); 91 le16enc(data + 40, md->md_no); 92 le16enc(data + 42, md->md_all); 93 le32enc(data + 44, md->md_stripesize); 94 bcopy(md->md_provider, data + 48, sizeof(md->md_provider)); 95 le64enc(data + 64, md->md_provsize); 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 bcopy(data + 48, md->md_provider, sizeof(md->md_provider)); 109 md->md_provsize = le64dec(data + 64); 110 } 111 112 #endif /* _G_STRIPE_H_ */ 113