disk.c revision 1.2.10.2
1 1.2.10.2 skrll /* $NetBSD: disk.c,v 1.2.10.2 2005/11/10 13:55:09 skrll Exp $ */ 2 1.2.10.2 skrll 3 1.2.10.2 skrll /* 4 1.2.10.2 skrll * Copyright (c) 1992, 1993 5 1.2.10.2 skrll * The Regents of the University of California. All rights reserved. 6 1.2.10.2 skrll * 7 1.2.10.2 skrll * This code is derived from software contributed to Berkeley by 8 1.2.10.2 skrll * Van Jacobson of Lawrence Berkeley Laboratory and Ralph Campbell. 9 1.2.10.2 skrll * 10 1.2.10.2 skrll * Redistribution and use in source and binary forms, with or without 11 1.2.10.2 skrll * modification, are permitted provided that the following conditions 12 1.2.10.2 skrll * are met: 13 1.2.10.2 skrll * 1. Redistributions of source code must retain the above copyright 14 1.2.10.2 skrll * notice, this list of conditions and the following disclaimer. 15 1.2.10.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.10.2 skrll * notice, this list of conditions and the following disclaimer in the 17 1.2.10.2 skrll * documentation and/or other materials provided with the distribution. 18 1.2.10.2 skrll * 3. Neither the name of the University nor the names of its contributors 19 1.2.10.2 skrll * may be used to endorse or promote products derived from this software 20 1.2.10.2 skrll * without specific prior written permission. 21 1.2.10.2 skrll * 22 1.2.10.2 skrll * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 1.2.10.2 skrll * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 1.2.10.2 skrll * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 1.2.10.2 skrll * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 1.2.10.2 skrll * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 1.2.10.2 skrll * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 1.2.10.2 skrll * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 1.2.10.2 skrll * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 1.2.10.2 skrll * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 1.2.10.2 skrll * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 1.2.10.2 skrll * SUCH DAMAGE. 33 1.2.10.2 skrll * 34 1.2.10.2 skrll * @(#)disk.c 8.1 (Berkeley) 6/10/93 35 1.2.10.2 skrll */ 36 1.2.10.2 skrll 37 1.2.10.2 skrll #include <lib/libsa/stand.h> 38 1.2.10.2 skrll #include <machine/stdarg.h> 39 1.2.10.2 skrll 40 1.2.10.2 skrll #include <sys/param.h> 41 1.2.10.2 skrll #include <sys/disklabel.h> 42 1.2.10.2 skrll 43 1.2.10.2 skrll #include <dev/arcbios/arcbios.h> 44 1.2.10.2 skrll 45 1.2.10.2 skrll #include "common.h" 46 1.2.10.2 skrll #include "disk.h" 47 1.2.10.2 skrll 48 1.2.10.2 skrll #define RF_PROTECTED_SECTORS 64 /* XXX refer to <.../rf_optnames.h> */ 49 1.2.10.2 skrll 50 1.2.10.2 skrll extern const struct arcbios_fv *ARCBIOS; 51 1.2.10.2 skrll 52 1.2.10.2 skrll struct disk_softc { 53 1.2.10.2 skrll u_long sc_fd; /* ARCBIOS file id */ 54 1.2.10.2 skrll int sc_part; /* disk partition number */ 55 1.2.10.2 skrll struct disklabel sc_label; /* disk label for this disk */ 56 1.2.10.2 skrll }; 57 1.2.10.2 skrll 58 1.2.10.2 skrll int 59 1.2.10.2 skrll diskstrategy(void *devdata, int rw, daddr_t bn, size_t reqcnt, void *addr, 60 1.2.10.2 skrll size_t *cnt) 61 1.2.10.2 skrll { 62 1.2.10.2 skrll struct disk_softc *sc = (struct disk_softc *)devdata; 63 1.2.10.2 skrll int part = sc->sc_part; 64 1.2.10.2 skrll struct partition *pp = &sc->sc_label.d_partitions[part]; 65 1.2.10.2 skrll long error; 66 1.2.10.2 skrll int64_t offset; 67 1.2.10.2 skrll u_long count; 68 1.2.10.2 skrll 69 1.2.10.2 skrll offset = bn; 70 1.2.10.2 skrll 71 1.2.10.2 skrll /* 72 1.2.10.2 skrll * Partial-block transfers not handled. 73 1.2.10.2 skrll */ 74 1.2.10.2 skrll if (reqcnt & (DEV_BSIZE - 1)) { 75 1.2.10.2 skrll *cnt = 0; 76 1.2.10.2 skrll return EINVAL; 77 1.2.10.2 skrll } 78 1.2.10.2 skrll 79 1.2.10.2 skrll offset += pp->p_offset; 80 1.2.10.2 skrll 81 1.2.10.2 skrll if (pp->p_fstype == FS_RAID) 82 1.2.10.2 skrll offset += RF_PROTECTED_SECTORS; 83 1.2.10.2 skrll 84 1.2.10.2 skrll /* 85 1.2.10.2 skrll * Convert from blocks to bytes. 86 1.2.10.2 skrll */ 87 1.2.10.2 skrll offset *= DEV_BSIZE; 88 1.2.10.2 skrll 89 1.2.10.2 skrll error = (*ARCBIOS->Seek)(sc->sc_fd, &offset, 0); 90 1.2.10.2 skrll if (error != ARCBIOS_ESUCCESS) 91 1.2.10.2 skrll return EIO; 92 1.2.10.2 skrll error = (*ARCBIOS->Read)(sc->sc_fd, addr, reqcnt, &count); 93 1.2.10.2 skrll if (error != ARCBIOS_ESUCCESS) 94 1.2.10.2 skrll return EIO; 95 1.2.10.2 skrll 96 1.2.10.2 skrll *cnt = count; 97 1.2.10.2 skrll return 0; 98 1.2.10.2 skrll } 99 1.2.10.2 skrll 100 1.2.10.2 skrll int 101 1.2.10.2 skrll diskopen(struct open_file *f, ...) 102 1.2.10.2 skrll { 103 1.2.10.2 skrll int part; 104 1.2.10.2 skrll 105 1.2.10.2 skrll struct disk_softc *sc; 106 1.2.10.2 skrll struct disklabel *lp; 107 1.2.10.2 skrll #ifdef arc 108 1.2.10.2 skrll char *msg, buf[DEV_BSIZE]; 109 1.2.10.2 skrll size_t cnt; 110 1.2.10.2 skrll int mbrp_off, i; 111 1.2.10.2 skrll #endif 112 1.2.10.2 skrll int error; 113 1.2.10.2 skrll u_long fd; 114 1.2.10.2 skrll char *device; 115 1.2.10.2 skrll va_list ap; 116 1.2.10.2 skrll 117 1.2.10.2 skrll va_start(ap, f); 118 1.2.10.2 skrll 119 1.2.10.2 skrll device = va_arg(ap, char *); 120 1.2.10.2 skrll 121 1.2.10.2 skrll /* 122 1.2.10.2 skrll * For NetBSD/sgimips, since we use the SGI partition map directly, 123 1.2.10.2 skrll * we fake an in-core NetBSD disklabel with offset of 0. 124 1.2.10.2 skrll * 125 1.2.10.2 skrll * For NetBSD/arc, there is a MBR partition map on the disk, which we 126 1.2.10.2 skrll * then expect to find a NetBSD disklabel within the MBR partition. 127 1.2.10.2 skrll * We require that the kernel be located in first partition in the 128 1.2.10.2 skrll * NetBSD disklabel, because we have not other way to represent the 129 1.2.10.2 skrll * root partition. 130 1.2.10.2 skrll */ 131 1.2.10.2 skrll part = 0; 132 1.2.10.2 skrll 133 1.2.10.2 skrll if (part >= MAXPARTITIONS) 134 1.2.10.2 skrll return ENXIO; 135 1.2.10.2 skrll 136 1.2.10.2 skrll error = (*ARCBIOS->Open)(device, 0, &fd); 137 1.2.10.2 skrll if (error) { 138 1.2.10.2 skrll printf("diskopen: open failed, errno = %d\n", error); 139 1.2.10.2 skrll return ENXIO; 140 1.2.10.2 skrll } 141 1.2.10.2 skrll 142 1.2.10.2 skrll sc = alloc(sizeof(struct disk_softc)); 143 1.2.10.2 skrll memset(sc, 0, sizeof(struct disk_softc)); 144 1.2.10.2 skrll f->f_devdata = (void *)sc; 145 1.2.10.2 skrll 146 1.2.10.2 skrll sc->sc_fd = fd; 147 1.2.10.2 skrll sc->sc_part = part; 148 1.2.10.2 skrll 149 1.2.10.2 skrll /* try to read disk label and partition table information */ 150 1.2.10.2 skrll lp = &sc->sc_label; 151 1.2.10.2 skrll lp->d_secsize = DEV_BSIZE; 152 1.2.10.2 skrll lp->d_secpercyl = 1; 153 1.2.10.2 skrll lp->d_npartitions = MAXPARTITIONS; 154 1.2.10.2 skrll lp->d_partitions[part].p_offset = 0; 155 1.2.10.2 skrll lp->d_partitions[part].p_size = 0x7fffffff; 156 1.2.10.2 skrll 157 1.2.10.2 skrll #ifdef arc 158 1.2.10.2 skrll error = diskstrategy(sc, F_READ, (daddr_t)LABELSECTOR, DEV_BSIZE, 159 1.2.10.2 skrll buf, &cnt); 160 1.2.10.2 skrll if (error || cnt != DEV_BSIZE) { 161 1.2.10.2 skrll printf("%s: can't read disklabel, errno = %d\n", 162 1.2.10.2 skrll device, error); 163 1.2.10.2 skrll free(sc, sizeof(struct disk_softc)); 164 1.2.10.2 skrll return ENXIO; 165 1.2.10.2 skrll } 166 1.2.10.2 skrll msg = getdisklabel(buf, lp); 167 1.2.10.2 skrll if (msg) { 168 1.2.10.2 skrll /* If no label, just assume 0 and return */ 169 1.2.10.2 skrll return 0; 170 1.2.10.2 skrll } 171 1.2.10.2 skrll 172 1.2.10.2 skrll /* 173 1.2.10.2 skrll * On arc, we can't open whole disk, but can open each partition with 174 1.2.10.2 skrll * OSLOADPARTITION like scsi(0)disk(0)rdisk()partition(1) etc. 175 1.2.10.2 skrll * Thus, we don't have to add offset of the MBR partition. 176 1.2.10.2 skrll */ 177 1.2.10.2 skrll /* XXX magic: partition 2 is whole NetBSD partition */ 178 1.2.10.2 skrll mbrp_off = lp->d_partitions[2].p_offset; 179 1.2.10.2 skrll for (i = 0; i < MAXPARTITIONS; i++) { 180 1.2.10.2 skrll if (lp->d_partitions[i].p_fstype != FS_UNUSED && 181 1.2.10.2 skrll lp->d_partitions[i].p_offset >= mbrp_off) 182 1.2.10.2 skrll lp->d_partitions[i].p_offset -= mbrp_off; 183 1.2.10.2 skrll } 184 1.2.10.2 skrll 185 1.2.10.2 skrll if (part >= lp->d_npartitions || 186 1.2.10.2 skrll lp->d_partitions[part].p_fstype == FS_UNUSED || 187 1.2.10.2 skrll lp->d_partitions[part].p_size == 0) { 188 1.2.10.2 skrll free(sc, sizeof(struct disk_softc)); 189 1.2.10.2 skrll return ENXIO; 190 1.2.10.2 skrll } 191 1.2.10.2 skrll #endif 192 1.2.10.2 skrll return 0; 193 1.2.10.2 skrll } 194 1.2.10.2 skrll 195 1.2.10.2 skrll #ifndef LIBSA_NO_DEV_CLOSE 196 1.2.10.2 skrll int 197 1.2.10.2 skrll diskclose(struct open_file *f) 198 1.2.10.2 skrll { 199 1.2.10.2 skrll 200 1.2.10.2 skrll (*ARCBIOS->Close)(((struct disk_softc *)(f->f_devdata))->sc_fd); 201 1.2.10.2 skrll free(f->f_devdata, sizeof(struct disk_softc)); 202 1.2.10.2 skrll f->f_devdata = NULL; 203 1.2.10.2 skrll return 0; 204 1.2.10.2 skrll } 205 1.2.10.2 skrll #endif 206
Indexes created Mon Oct 13 16:09:52 GMT 2025