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_CONCAT_H_ 32 #define _G_CONCAT_H_ 33 34 #include <sys/endian.h> 35 36 #define G_CONCAT_CLASS_NAME "CONCAT" 37 38 #define G_CONCAT_MAGIC "GEOM::CONCAT" 39 /* 40 * Version history: 41 * 1 - Initial version number. 42 * 2 - Added 'stop' command to gconcat(8). 43 * 3 - Added md_provider field to metadata and '-h' option to gconcat(8). 44 * 4 - Added md_provsize field to metadata. 45 */ 46 #define G_CONCAT_VERSION 4 47 48 #ifdef _KERNEL 49 #define G_CONCAT_TYPE_MANUAL 0 50 #define G_CONCAT_TYPE_AUTOMATIC 1 51 52 #define G_CONCAT_DEBUG(lvl, ...) \ 53 _GEOM_DEBUG("GEOM_CONCAT", g_concat_debug, (lvl), NULL, __VA_ARGS__) 54 #define G_CONCAT_LOGREQ(bp, ...) \ 55 _GEOM_DEBUG("GEOM_CONCAT", g_concat_debug, 2, (bp), __VA_ARGS__) 56 57 struct g_concat_disk { 58 TAILQ_ENTRY(g_concat_disk) d_next; 59 struct g_consumer *d_consumer; 60 struct g_concat_softc *d_softc; 61 off_t d_start; 62 off_t d_end; 63 int d_candelete; 64 int d_removed; 65 bool d_hardcoded; 66 }; 67 68 struct g_concat_softc { 69 u_int sc_type; /* provider type */ 70 struct g_geom *sc_geom; 71 struct g_provider *sc_provider; 72 uint32_t sc_id; /* concat unique ID */ 73 74 uint16_t sc_ndisks; 75 TAILQ_HEAD(g_concat_disks, g_concat_disk) sc_disks; 76 77 struct mtx sc_completion_lock; /* synchronizes cross-boundary IOs */ 78 struct sx sc_disks_lock; /* synchronizes modification of sc_disks */ 79 }; 80 #define sc_name sc_geom->name 81 #endif /* _KERNEL */ 82 83 struct g_concat_metadata { 84 char md_magic[16]; /* Magic value. */ 85 uint32_t md_version; /* Version number. */ 86 char md_name[16]; /* Concat 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 char md_provider[16]; /* Hardcoded provider. */ 91 uint64_t md_provsize; /* Provider's size. */ 92 }; 93 static __inline void 94 concat_metadata_encode(const struct g_concat_metadata *md, u_char *data) 95 { 96 97 bcopy(md->md_magic, data, sizeof(md->md_magic)); 98 le32enc(data + 16, md->md_version); 99 bcopy(md->md_name, data + 20, sizeof(md->md_name)); 100 le32enc(data + 36, md->md_id); 101 le16enc(data + 40, md->md_no); 102 le16enc(data + 42, md->md_all); 103 bcopy(md->md_provider, data + 44, sizeof(md->md_provider)); 104 le64enc(data + 60, md->md_provsize); 105 } 106 static __inline void 107 concat_metadata_decode(const u_char *data, struct g_concat_metadata *md) 108 { 109 110 bcopy(data, md->md_magic, sizeof(md->md_magic)); 111 md->md_version = le32dec(data + 16); 112 bcopy(data + 20, md->md_name, sizeof(md->md_name)); 113 md->md_id = le32dec(data + 36); 114 md->md_no = le16dec(data + 40); 115 md->md_all = le16dec(data + 42); 116 bcopy(data + 44, md->md_provider, sizeof(md->md_provider)); 117 md->md_provsize = le64dec(data + 60); 118 } 119 #endif /* _G_CONCAT_H_ */ 120