rdb.c revision 1.1.2.3
1 1.1.2.3 yamt /* $NetBSD: rdb.c,v 1.1.2.3 2010/08/11 22:52:31 yamt Exp $ */ 2 1.1.2.2 yamt 3 1.1.2.2 yamt /*- 4 1.1.2.2 yamt * Copyright (c) 2009 Frank Wille. 5 1.1.2.2 yamt * All rights reserved. 6 1.1.2.2 yamt * 7 1.1.2.2 yamt * Written by Frank Wille for The NetBSD Project. 8 1.1.2.2 yamt * 9 1.1.2.2 yamt * Redistribution and use in source and binary forms, with or without 10 1.1.2.2 yamt * modification, are permitted provided that the following conditions 11 1.1.2.2 yamt * are met: 12 1.1.2.2 yamt * 1. Redistributions of source code must retain the above copyright 13 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer. 14 1.1.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 15 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer in the 16 1.1.2.2 yamt * documentation and/or other materials provided with the distribution. 17 1.1.2.2 yamt * 18 1.1.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 1.1.2.2 yamt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 1.1.2.2 yamt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 1.1.2.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 1.1.2.2 yamt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 1.1.2.2 yamt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 1.1.2.2 yamt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 1.1.2.2 yamt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 1.1.2.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 1.1.2.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 1.1.2.2 yamt * POSSIBILITY OF SUCH DAMAGE. 29 1.1.2.2 yamt */ 30 1.1.2.2 yamt 31 1.1.2.2 yamt #include <sys/param.h> 32 1.1.2.2 yamt #include <sys/disklabel_rdb.h> 33 1.1.2.2 yamt 34 1.1.2.2 yamt #include <lib/libsa/stand.h> 35 1.1.2.2 yamt 36 1.1.2.2 yamt #include "rdb.h" 37 1.1.2.2 yamt 38 1.1.2.2 yamt 39 1.1.2.2 yamt static u_long 40 1.1.2.2 yamt rdbchksum(void *bdata) 41 1.1.2.2 yamt { 42 1.1.2.2 yamt u_long *blp, cnt, val; 43 1.1.2.2 yamt 44 1.1.2.2 yamt blp = bdata; 45 1.1.2.2 yamt cnt = blp[1]; 46 1.1.2.2 yamt val = 0; 47 1.1.2.2 yamt 48 1.1.2.2 yamt while (cnt--) 49 1.1.2.2 yamt val += *blp++; 50 1.1.2.2 yamt return val; 51 1.1.2.2 yamt } 52 1.1.2.2 yamt 53 1.1.2.2 yamt 54 1.1.2.2 yamt static struct adostype 55 1.1.2.2 yamt getadostype(u_long dostype) 56 1.1.2.2 yamt { 57 1.1.2.2 yamt struct adostype adt; 58 1.1.2.2 yamt u_long t3, b1; 59 1.1.2.2 yamt 60 1.1.2.2 yamt t3 = dostype & 0xffffff00; 61 1.1.2.2 yamt b1 = dostype & 0x000000ff; 62 1.1.2.2 yamt 63 1.1.2.2 yamt adt.fstype = b1; 64 1.1.2.2 yamt 65 1.1.2.2 yamt switch (t3) { 66 1.1.2.2 yamt case DOST_NBR: 67 1.1.2.2 yamt adt.archtype = ADT_NETBSDROOT; 68 1.1.2.2 yamt return adt; 69 1.1.2.2 yamt case DOST_NBS: 70 1.1.2.2 yamt adt.archtype = ADT_NETBSDSWAP; 71 1.1.2.2 yamt return adt; 72 1.1.2.2 yamt case DOST_NBU: 73 1.1.2.2 yamt adt.archtype = ADT_NETBSDUSER; 74 1.1.2.2 yamt return adt; 75 1.1.2.2 yamt case DOST_AMIX: 76 1.1.2.2 yamt adt.archtype = ADT_AMIX; 77 1.1.2.2 yamt if (b1 == 2) 78 1.1.2.2 yamt adt.fstype = FS_BSDFFS; 79 1.1.2.2 yamt else 80 1.1.2.2 yamt adt.fstype = FS_UNUSED; 81 1.1.2.2 yamt return adt; 82 1.1.2.2 yamt case DOST_XXXBSD: 83 1.1.2.2 yamt if (b1 == 'S') { 84 1.1.2.2 yamt dostype = DOST_NBS; 85 1.1.2.2 yamt dostype |= FS_SWAP; 86 1.1.2.2 yamt } else { 87 1.1.2.2 yamt if (b1 == 'R') 88 1.1.2.2 yamt dostype = DOST_NBR; 89 1.1.2.2 yamt else 90 1.1.2.2 yamt dostype = DOST_NBU; 91 1.1.2.2 yamt dostype |= FS_BSDFFS; 92 1.1.2.2 yamt } 93 1.1.2.2 yamt return getadostype(dostype); 94 1.1.2.2 yamt case DOST_EXT2: 95 1.1.2.2 yamt adt.archtype = ADT_EXT2; 96 1.1.2.2 yamt adt.fstype = FS_EX2FS; 97 1.1.2.2 yamt return adt; 98 1.1.2.2 yamt case DOST_RAID: 99 1.1.2.2 yamt adt.archtype = ADT_RAID; 100 1.1.2.2 yamt adt.fstype = FS_RAID; 101 1.1.2.2 yamt return adt; 102 1.1.2.3 yamt case DOST_MSD: 103 1.1.2.3 yamt adt.archtype = ADT_MSD; 104 1.1.2.3 yamt adt.fstype = FS_MSDOS; 105 1.1.2.3 yamt return adt; 106 1.1.2.2 yamt default: 107 1.1.2.2 yamt adt.archtype = ADT_UNKNOWN; 108 1.1.2.2 yamt adt.fstype = FS_UNUSED; 109 1.1.2.2 yamt return adt; 110 1.1.2.2 yamt } 111 1.1.2.2 yamt } 112 1.1.2.2 yamt 113 1.1.2.2 yamt 114 1.1.2.2 yamt /* 115 1.1.2.2 yamt * Find a valid RDB disklabel. 116 1.1.2.2 yamt */ 117 1.1.2.2 yamt int 118 1.1.2.2 yamt search_rdb_label(struct of_dev *devp, char *buf, struct disklabel *lp) 119 1.1.2.2 yamt { 120 1.1.2.2 yamt struct adostype adt; 121 1.1.2.2 yamt struct rdblock *rbp; 122 1.1.2.2 yamt struct partblock *pbp; 123 1.1.2.2 yamt struct disklabel *dlp; 124 1.1.2.2 yamt struct partition *pp; 125 1.1.2.2 yamt u_long blk; 126 1.1.2.2 yamt size_t read; 127 1.1.2.2 yamt int i; 128 1.1.2.2 yamt 129 1.1.2.2 yamt /* 130 1.1.2.2 yamt * Scan the first RDB_MAXBLOCKS of a disk for an RDB block. 131 1.1.2.2 yamt */ 132 1.1.2.2 yamt rbp = (struct rdblock *)buf; 133 1.1.2.2 yamt for (blk = 0; blk < RDB_MAXBLOCKS; blk++) { 134 1.1.2.2 yamt if (strategy(devp, F_READ, blk, DEV_BSIZE, buf, &read) 135 1.1.2.2 yamt || read != DEV_BSIZE) 136 1.1.2.2 yamt return ERDLAB; 137 1.1.2.2 yamt 138 1.1.2.2 yamt /* check for valid RDB */ 139 1.1.2.2 yamt if (rbp->id == RDBLOCK_ID && rdbchksum(rbp) == 0) 140 1.1.2.2 yamt break; 141 1.1.2.2 yamt 142 1.1.2.2 yamt /* check for native NetBSD label */ 143 1.1.2.2 yamt dlp = (struct disklabel *)(buf + LABELOFFSET); 144 1.1.2.2 yamt if (dlp->d_magic == DISKMAGIC && dkcksum(dlp) == 0) { 145 1.1.2.2 yamt *lp = *dlp; 146 1.1.2.2 yamt return 0; 147 1.1.2.2 yamt } 148 1.1.2.2 yamt } 149 1.1.2.2 yamt if (blk == RDB_MAXBLOCKS) 150 1.1.2.2 yamt return ERDLAB; 151 1.1.2.2 yamt 152 1.1.2.2 yamt /* Found RDB, clear disklabel partitions before reading PART blocks. */ 153 1.1.2.2 yamt lp->d_npartitions = RAW_PART + 1; 154 1.1.2.2 yamt for (i = 0; i < MAXPARTITIONS; i++) { 155 1.1.2.2 yamt lp->d_partitions[i].p_size = 0; 156 1.1.2.2 yamt lp->d_partitions[i].p_offset = 0; 157 1.1.2.2 yamt lp->d_partitions[i].p_fstype = 0; 158 1.1.2.2 yamt } 159 1.1.2.2 yamt 160 1.1.2.2 yamt /* 161 1.1.2.2 yamt * Construct a disklabel from RDB. 162 1.1.2.2 yamt */ 163 1.1.2.2 yamt lp->d_secsize = rbp->nbytes; 164 1.1.2.2 yamt lp->d_nsectors = rbp->nsectors; 165 1.1.2.2 yamt lp->d_ntracks = rbp->nheads; 166 1.1.2.2 yamt /* be prepared that rbp->ncylinders may be a bogus value */ 167 1.1.2.2 yamt if (rbp->highcyl == 0) 168 1.1.2.2 yamt lp->d_ncylinders = rbp->ncylinders; 169 1.1.2.2 yamt else 170 1.1.2.2 yamt lp->d_ncylinders = rbp->highcyl + 1; 171 1.1.2.2 yamt /* also don't trust rbp->secpercyl */ 172 1.1.2.2 yamt lp->d_secpercyl = (rbp->secpercyl <= lp->d_nsectors * lp->d_ntracks) ? 173 1.1.2.2 yamt rbp->secpercyl : lp->d_nsectors * lp->d_ntracks; 174 1.1.2.2 yamt if (lp->d_secpercyl == 0) 175 1.1.2.2 yamt lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 176 1.1.2.2 yamt 177 1.1.2.2 yamt lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 178 1.1.2.2 yamt lp->d_acylinders = rbp->ncylinders - (rbp->highcyl - rbp->lowcyl + 1); 179 1.1.2.2 yamt lp->d_rpm = 3600; 180 1.1.2.2 yamt lp->d_interleave = rbp->interleave; 181 1.1.2.2 yamt lp->d_headswitch = lp->d_flags = lp->d_trackskew = lp->d_cylskew = 0; 182 1.1.2.2 yamt lp->d_trkseek = 0; 183 1.1.2.2 yamt 184 1.1.2.2 yamt /* raw partition gets the entire disk */ 185 1.1.2.2 yamt lp->d_partitions[RAW_PART].p_size = rbp->ncylinders * lp->d_secpercyl; 186 1.1.2.2 yamt 187 1.1.2.2 yamt /* 188 1.1.2.2 yamt * Now scan for partition blocks. 189 1.1.2.2 yamt */ 190 1.1.2.2 yamt pbp = (struct partblock *)buf; 191 1.1.2.2 yamt for (blk = rbp->partbhead; blk != RDBNULL; blk = pbp->next) { 192 1.1.2.2 yamt if (strategy(devp, F_READ, blk * (lp->d_secsize / DEV_BSIZE), 193 1.1.2.2 yamt lp->d_secsize, buf, &read) 194 1.1.2.2 yamt || read != lp->d_secsize) 195 1.1.2.2 yamt return ERDLAB; 196 1.1.2.2 yamt 197 1.1.2.2 yamt /* verify ID and checksum of PART block */ 198 1.1.2.2 yamt if (pbp->id != PARTBLOCK_ID || rdbchksum(pbp)) 199 1.1.2.2 yamt return ERDLAB; 200 1.1.2.2 yamt 201 1.1.2.2 yamt /* environment table in PART block needs at least 11 entries */ 202 1.1.2.2 yamt if (pbp->e.tabsize < 11) 203 1.1.2.2 yamt return ERDLAB; 204 1.1.2.2 yamt 205 1.1.2.2 yamt /* need a table size of 16 for a valid dostype */ 206 1.1.2.2 yamt if (pbp->e.tabsize < 16) 207 1.1.2.2 yamt pbp->e.dostype = 0; 208 1.1.2.2 yamt adt = getadostype(pbp->e.dostype); 209 1.1.2.2 yamt 210 1.1.2.2 yamt /* determine partition index */ 211 1.1.2.2 yamt switch (adt.archtype) { 212 1.1.2.2 yamt case ADT_NETBSDROOT: 213 1.1.2.2 yamt pp = &lp->d_partitions[0]; 214 1.1.2.2 yamt if (pp->p_size) 215 1.1.2.2 yamt continue; 216 1.1.2.2 yamt break; 217 1.1.2.2 yamt case ADT_NETBSDSWAP: 218 1.1.2.2 yamt pp = &lp->d_partitions[1]; 219 1.1.2.2 yamt if (pp->p_size) 220 1.1.2.2 yamt continue; 221 1.1.2.2 yamt break; 222 1.1.2.2 yamt default: 223 1.1.2.2 yamt pp = &lp->d_partitions[lp->d_npartitions++]; 224 1.1.2.2 yamt break; 225 1.1.2.2 yamt } 226 1.1.2.2 yamt 227 1.1.2.2 yamt /* sort partitions after RAW_PART by offset */ 228 1.1.2.2 yamt while ((pp - lp->d_partitions) > RAW_PART + 1) { 229 1.1.2.2 yamt daddr_t boff; 230 1.1.2.2 yamt 231 1.1.2.2 yamt boff = pbp->e.lowcyl * pbp->e.secpertrk 232 1.1.2.2 yamt * pbp->e.numheads 233 1.1.2.2 yamt * ((pbp->e.sizeblock << 2) / lp->d_secsize); 234 1.1.2.2 yamt if (boff > (pp - 1)->p_offset) 235 1.1.2.2 yamt break; 236 1.1.2.2 yamt *pp = *(pp - 1); /* struct copy */ 237 1.1.2.2 yamt pp--; 238 1.1.2.2 yamt } 239 1.1.2.2 yamt 240 1.1.2.2 yamt /* get partition size, offset, fstype */ 241 1.1.2.2 yamt pp->p_size = (pbp->e.highcyl - pbp->e.lowcyl + 1) 242 1.1.2.2 yamt * pbp->e.secpertrk * pbp->e.numheads 243 1.1.2.2 yamt * ((pbp->e.sizeblock << 2) / lp->d_secsize); 244 1.1.2.2 yamt pp->p_offset = pbp->e.lowcyl * pbp->e.secpertrk 245 1.1.2.2 yamt * pbp->e.numheads 246 1.1.2.2 yamt * ((pbp->e.sizeblock << 2) / lp->d_secsize); 247 1.1.2.2 yamt pp->p_fstype = adt.fstype; 248 1.1.2.2 yamt } 249 1.1.2.2 yamt 250 1.1.2.2 yamt /* 251 1.1.2.2 yamt * All partitions have been found. The disklabel is valid. 252 1.1.2.2 yamt */ 253 1.1.2.2 yamt lp->d_magic = lp->d_magic2 = DISKMAGIC; 254 1.1.2.2 yamt lp->d_checksum = 0; 255 1.1.2.2 yamt lp->d_checksum = dkcksum(lp); 256 1.1.2.2 yamt return 0; 257 1.1.2.2 yamt } 258
Indexes created Mon Oct 20 20:10:13 GMT 2025