1 /*- 2 * Copyright (c) 2004 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_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 */ 43 #define G_CONCAT_VERSION 3 44 45 #ifdef _KERNEL 46 #define G_CONCAT_TYPE_MANUAL 0 47 #define G_CONCAT_TYPE_AUTOMATIC 1 48 49 #define G_CONCAT_DEBUG(lvl, ...) do { \ 50 if (g_concat_debug >= (lvl)) { \ 51 printf("GEOM_CONCAT"); \ 52 if (g_concat_debug > 0) \ 53 printf("[%u]", lvl); \ 54 printf(": "); \ 55 printf(__VA_ARGS__); \ 56 printf("\n"); \ 57 } \ 58 } while (0) 59 #define G_CONCAT_LOGREQ(bp, ...) do { \ 60 if (g_concat_debug >= 2) { \ 61 printf("GEOM_CONCAT[2]: "); \ 62 printf(__VA_ARGS__); \ 63 printf(" "); \ 64 g_print_bio(bp); \ 65 printf("\n"); \ 66 } \ 67 } while (0) 68 69 struct g_concat_disk { 70 struct g_consumer *d_consumer; 71 struct g_concat_softc *d_softc; 72 off_t d_start; 73 off_t d_end; 74 }; 75 76 struct g_concat_softc { 77 u_int sc_type; /* provider type */ 78 struct g_geom *sc_geom; 79 struct g_provider *sc_provider; 80 uint32_t sc_id; /* concat unique ID */ 81 82 struct g_concat_disk *sc_disks; 83 uint16_t sc_ndisks; 84 }; 85 #define sc_name sc_geom->name 86 #endif /* _KERNEL */ 87 88 struct g_concat_metadata { 89 char md_magic[16]; /* Magic value. */ 90 uint32_t md_version; /* Version number. */ 91 char md_name[16]; /* Concat name. */ 92 uint32_t md_id; /* Unique ID. */ 93 uint16_t md_no; /* Disk number. */ 94 uint16_t md_all; /* Number of all disks. */ 95 char md_provider[16]; /* Hardcoded provider. */ 96 }; 97 static __inline void 98 concat_metadata_encode(const struct g_concat_metadata *md, u_char *data) 99 { 100 101 bcopy(md->md_magic, data, sizeof(md->md_magic)); 102 le32enc(data + 16, md->md_version); 103 bcopy(md->md_name, data + 20, sizeof(md->md_name)); 104 le32enc(data + 36, md->md_id); 105 le16enc(data + 40, md->md_no); 106 le16enc(data + 42, md->md_all); 107 bcopy(md->md_provider, data + 44, sizeof(md->md_provider)); 108 } 109 static __inline void 110 concat_metadata_decode(const u_char *data, struct g_concat_metadata *md) 111 { 112 113 bcopy(data, md->md_magic, sizeof(md->md_magic)); 114 md->md_version = le32dec(data + 16); 115 bcopy(data + 20, md->md_name, sizeof(md->md_name)); 116 md->md_id = le32dec(data + 36); 117 md->md_no = le16dec(data + 40); 118 md->md_all = le16dec(data + 42); 119 bcopy(data + 44, md->md_provider, sizeof(md->md_provider)); 120 } 121 #endif /* _G_CONCAT_H_ */ 122