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_CONCAT_H_ 30 #define _G_CONCAT_H_ 31 32 #include <sys/endian.h> 33 34 #define G_CONCAT_CLASS_NAME "CONCAT" 35 36 #define G_CONCAT_MAGIC "GEOM::CONCAT" 37 /* 38 * Version history: 39 * 1 - Initial version number. 40 * 2 - Added 'stop' command to gconcat(8). 41 * 3 - Added md_provider field to metadata and '-h' option to gconcat(8). 42 * 4 - Added md_provsize field to metadata. 43 */ 44 #define G_CONCAT_VERSION 4 45 46 #ifdef _KERNEL 47 #define G_CONCAT_TYPE_MANUAL 0 48 #define G_CONCAT_TYPE_AUTOMATIC 1 49 50 #define G_CONCAT_DEBUG(lvl, ...) \ 51 _GEOM_DEBUG("GEOM_CONCAT", g_concat_debug, (lvl), NULL, __VA_ARGS__) 52 #define G_CONCAT_LOGREQ(bp, ...) \ 53 _GEOM_DEBUG("GEOM_CONCAT", g_concat_debug, 2, (bp), __VA_ARGS__) 54 55 struct g_concat_disk { 56 TAILQ_ENTRY(g_concat_disk) d_next; 57 struct g_consumer *d_consumer; 58 struct g_concat_softc *d_softc; 59 off_t d_start; 60 off_t d_end; 61 int d_candelete; 62 int d_removed; 63 bool d_hardcoded; 64 }; 65 66 struct g_concat_softc { 67 u_int sc_type; /* provider type */ 68 struct g_geom *sc_geom; 69 struct g_provider *sc_provider; 70 uint32_t sc_id; /* concat unique ID */ 71 72 uint16_t sc_ndisks; 73 TAILQ_HEAD(g_concat_disks, g_concat_disk) sc_disks; 74 75 struct mtx sc_completion_lock; /* synchronizes cross-boundary IOs */ 76 struct sx sc_disks_lock; /* synchronizes modification of sc_disks */ 77 }; 78 #define sc_name sc_geom->name 79 #endif /* _KERNEL */ 80 81 struct g_concat_metadata { 82 char md_magic[16]; /* Magic value. */ 83 uint32_t md_version; /* Version number. */ 84 char md_name[16]; /* Concat name. */ 85 uint32_t md_id; /* Unique ID. */ 86 uint16_t md_no; /* Disk number. */ 87 uint16_t md_all; /* Number of all disks. */ 88 char md_provider[16]; /* Hardcoded provider. */ 89 uint64_t md_provsize; /* Provider's size. */ 90 }; 91 static __inline void 92 concat_metadata_encode(const struct g_concat_metadata *md, u_char *data) 93 { 94 95 bcopy(md->md_magic, data, sizeof(md->md_magic)); 96 le32enc(data + 16, md->md_version); 97 bcopy(md->md_name, data + 20, sizeof(md->md_name)); 98 le32enc(data + 36, md->md_id); 99 le16enc(data + 40, md->md_no); 100 le16enc(data + 42, md->md_all); 101 bcopy(md->md_provider, data + 44, sizeof(md->md_provider)); 102 le64enc(data + 60, md->md_provsize); 103 } 104 static __inline void 105 concat_metadata_decode(const u_char *data, struct g_concat_metadata *md) 106 { 107 108 bcopy(data, md->md_magic, sizeof(md->md_magic)); 109 md->md_version = le32dec(data + 16); 110 bcopy(data + 20, md->md_name, sizeof(md->md_name)); 111 md->md_id = le32dec(data + 36); 112 md->md_no = le16dec(data + 40); 113 md->md_all = le16dec(data + 42); 114 bcopy(data + 44, md->md_provider, sizeof(md->md_provider)); 115 md->md_provsize = le64dec(data + 60); 116 } 117 #endif /* _G_CONCAT_H_ */ 118