g_concat.h revision 260385
1228063Sbapt/*- 295060Sjmallett * Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org> 395060Sjmallett * All rights reserved. 41590Srgrimes * 51590Srgrimes * Redistribution and use in source and binary forms, with or without 61590Srgrimes * modification, are permitted provided that the following conditions 71590Srgrimes * are met: 81590Srgrimes * 1. Redistributions of source code must retain the above copyright 91590Srgrimes * notice, this list of conditions and the following disclaimer. 101590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111590Srgrimes * notice, this list of conditions and the following disclaimer in the 121590Srgrimes * documentation and/or other materials provided with the distribution. 131590Srgrimes * 141590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 151590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 161590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 171590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 181590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19228063Sbapt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 201590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 211590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 221590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 231590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 241590Srgrimes * SUCH DAMAGE. 251590Srgrimes * 261590Srgrimes * $FreeBSD: stable/10/sys/geom/concat/g_concat.h 260385 2014-01-07 01:32:23Z scottl $ 271590Srgrimes */ 281590Srgrimes 291590Srgrimes#ifndef _G_CONCAT_H_ 301590Srgrimes#define _G_CONCAT_H_ 311590Srgrimes 321590Srgrimes#include <sys/endian.h> 331590Srgrimes 341590Srgrimes#define G_CONCAT_CLASS_NAME "CONCAT" 351590Srgrimes 3695060Sjmallett#define G_CONCAT_MAGIC "GEOM::CONCAT" 371590Srgrimes/* 381590Srgrimes * Version history: 391590Srgrimes * 1 - Initial version number. 401590Srgrimes * 2 - Added 'stop' command to gconcat(8). 411590Srgrimes * 3 - Added md_provider field to metadata and '-h' option to gconcat(8). 421590Srgrimes * 4 - Added md_provsize field to metadata. 431590Srgrimes */ 441590Srgrimes#define G_CONCAT_VERSION 4 451590Srgrimes 461590Srgrimes#ifdef _KERNEL 471590Srgrimes#define G_CONCAT_TYPE_MANUAL 0 48100014Sjmallett#define G_CONCAT_TYPE_AUTOMATIC 1 49100014Sjmallett 50100014Sjmallett#define G_CONCAT_DEBUG(lvl, ...) do { \ 511590Srgrimes if (g_concat_debug >= (lvl)) { \ 521590Srgrimes printf("GEOM_CONCAT"); \ 531590Srgrimes if (g_concat_debug > 0) \ 541590Srgrimes printf("[%u]", lvl); \ 551590Srgrimes printf(": "); \ 561590Srgrimes printf(__VA_ARGS__); \ 57 printf("\n"); \ 58 } \ 59} while (0) 60#define G_CONCAT_LOGREQ(bp, ...) do { \ 61 if (g_concat_debug >= 2) { \ 62 printf("GEOM_CONCAT[2]: "); \ 63 printf(__VA_ARGS__); \ 64 printf(" "); \ 65 g_print_bio(bp); \ 66 printf("\n"); \ 67 } \ 68} while (0) 69 70struct g_concat_disk { 71 struct g_consumer *d_consumer; 72 struct g_concat_softc *d_softc; 73 off_t d_start; 74 off_t d_end; 75 int d_removed; 76}; 77 78struct g_concat_softc { 79 u_int sc_type; /* provider type */ 80 struct g_geom *sc_geom; 81 struct g_provider *sc_provider; 82 uint32_t sc_id; /* concat unique ID */ 83 84 struct g_concat_disk *sc_disks; 85 uint16_t sc_ndisks; 86 struct mtx sc_lock; 87}; 88#define sc_name sc_geom->name 89#endif /* _KERNEL */ 90 91struct g_concat_metadata { 92 char md_magic[16]; /* Magic value. */ 93 uint32_t md_version; /* Version number. */ 94 char md_name[16]; /* Concat name. */ 95 uint32_t md_id; /* Unique ID. */ 96 uint16_t md_no; /* Disk number. */ 97 uint16_t md_all; /* Number of all disks. */ 98 char md_provider[16]; /* Hardcoded provider. */ 99 uint64_t md_provsize; /* Provider's size. */ 100}; 101static __inline void 102concat_metadata_encode(const struct g_concat_metadata *md, u_char *data) 103{ 104 105 bcopy(md->md_magic, data, sizeof(md->md_magic)); 106 le32enc(data + 16, md->md_version); 107 bcopy(md->md_name, data + 20, sizeof(md->md_name)); 108 le32enc(data + 36, md->md_id); 109 le16enc(data + 40, md->md_no); 110 le16enc(data + 42, md->md_all); 111 bcopy(md->md_provider, data + 44, sizeof(md->md_provider)); 112 le64enc(data + 60, md->md_provsize); 113} 114static __inline void 115concat_metadata_decode(const u_char *data, struct g_concat_metadata *md) 116{ 117 118 bcopy(data, md->md_magic, sizeof(md->md_magic)); 119 md->md_version = le32dec(data + 16); 120 bcopy(data + 20, md->md_name, sizeof(md->md_name)); 121 md->md_id = le32dec(data + 36); 122 md->md_no = le16dec(data + 40); 123 md->md_all = le16dec(data + 42); 124 bcopy(data + 44, md->md_provider, sizeof(md->md_provider)); 125 md->md_provsize = le64dec(data + 60); 126} 127#endif /* _G_CONCAT_H_ */ 128