g_concat.h revision 131649
1126007Spjd/*- 2126589Spjd * Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3126007Spjd * All rights reserved. 4126007Spjd * 5126007Spjd * Redistribution and use in source and binary forms, with or without 6126007Spjd * modification, are permitted provided that the following conditions 7126007Spjd * are met: 8126007Spjd * 1. Redistributions of source code must retain the above copyright 9126007Spjd * notice, this list of conditions and the following disclaimer. 10126007Spjd * 2. Redistributions in binary form must reproduce the above copyright 11126007Spjd * notice, this list of conditions and the following disclaimer in the 12126007Spjd * documentation and/or other materials provided with the distribution. 13126007Spjd * 14126007Spjd * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15126007Spjd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16126007Spjd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17126007Spjd * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18126007Spjd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19126007Spjd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20126007Spjd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21126007Spjd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22126007Spjd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23126007Spjd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24126007Spjd * SUCH DAMAGE. 25126007Spjd * 26126007Spjd * $FreeBSD: head/sys/geom/concat/g_concat.h 131649 2004-07-05 21:16:37Z pjd $ 27126007Spjd */ 28126007Spjd 29126007Spjd#ifndef _G_CONCAT_H_ 30126007Spjd#define _G_CONCAT_H_ 31126007Spjd 32126007Spjd#include <sys/endian.h> 33126007Spjd 34126007Spjd#define G_CONCAT_CLASS_NAME "CONCAT" 35126007Spjd 36126007Spjd#define G_CONCAT_MAGIC "GEOM::CONCAT" 37131649Spjd#define G_CONCAT_VERSION 2 38126007Spjd 39126007Spjd#ifdef _KERNEL 40126007Spjd#define G_CONCAT_TYPE_MANUAL 0 41126007Spjd#define G_CONCAT_TYPE_AUTOMATIC 1 42126007Spjd 43126007Spjd#define G_CONCAT_DEBUG(lvl, ...) do { \ 44126007Spjd if (g_concat_debug >= (lvl)) { \ 45129478Spjd printf("GEOM_CONCAT"); \ 46129478Spjd if (g_concat_debug > 0) \ 47129478Spjd printf("[%u]", lvl); \ 48129478Spjd printf(": "); \ 49126007Spjd printf(__VA_ARGS__); \ 50126007Spjd printf("\n"); \ 51126007Spjd } \ 52126007Spjd} while (0) 53126007Spjd#define G_CONCAT_LOGREQ(bp, ...) do { \ 54126007Spjd if (g_concat_debug >= 2) { \ 55126007Spjd printf("GEOM_CONCAT[2]: "); \ 56126007Spjd printf(__VA_ARGS__); \ 57126772Spjd printf(" "); \ 58126007Spjd g_print_bio(bp); \ 59126007Spjd printf("\n"); \ 60126007Spjd } \ 61126007Spjd} while (0) 62126007Spjd 63126007Spjdstruct g_concat_disk { 64126007Spjd struct g_consumer *d_consumer; 65126007Spjd struct g_concat_softc *d_softc; 66126007Spjd off_t d_start; 67126007Spjd off_t d_end; 68126007Spjd}; 69126007Spjd 70126007Spjdstruct g_concat_softc { 71129478Spjd u_int sc_type; /* provider type */ 72129478Spjd struct g_geom *sc_geom; 73126007Spjd struct g_provider *sc_provider; 74129478Spjd char sc_name[16]; /* concat name */ 75129478Spjd uint32_t sc_id; /* concat unique ID */ 76126007Spjd 77126007Spjd struct g_concat_disk *sc_disks; 78129478Spjd uint16_t sc_ndisks; 79126007Spjd}; 80126007Spjd#endif /* _KERNEL */ 81126007Spjd 82126007Spjdstruct g_concat_metadata { 83126007Spjd char md_magic[16]; /* Magic value. */ 84126007Spjd uint32_t md_version; /* Version number. */ 85126007Spjd char md_name[16]; /* Concat name. */ 86126007Spjd uint32_t md_id; /* Unique ID. */ 87126007Spjd uint16_t md_no; /* Disk number. */ 88126007Spjd uint16_t md_all; /* Number of all disks. */ 89126007Spjd}; 90126007Spjdstatic __inline void 91126007Spjdconcat_metadata_encode(const struct g_concat_metadata *md, u_char *data) 92126007Spjd{ 93126007Spjd 94126007Spjd bcopy(md->md_magic, data, sizeof(md->md_magic)); 95126007Spjd le32enc(data + 16, md->md_version); 96126007Spjd bcopy(md->md_name, data + 20, sizeof(md->md_name)); 97126007Spjd le32enc(data + 36, md->md_id); 98126007Spjd le16enc(data + 40, md->md_no); 99126007Spjd le16enc(data + 42, md->md_all); 100126007Spjd} 101126007Spjdstatic __inline void 102126007Spjdconcat_metadata_decode(const u_char *data, struct g_concat_metadata *md) 103126007Spjd{ 104126007Spjd 105126007Spjd bcopy(data, md->md_magic, sizeof(md->md_magic)); 106126007Spjd md->md_version = le32dec(data + 16); 107126007Spjd bcopy(data + 20, md->md_name, sizeof(md->md_name)); 108126007Spjd md->md_id = le32dec(data + 36); 109126007Spjd md->md_no = le16dec(data + 40); 110126007Spjd md->md_all = le16dec(data + 42); 111126007Spjd} 112126007Spjd#endif /* _G_CONCAT_H_ */ 113