1 /* $NetBSD: disklbl.c,v 1.6 2009/03/14 21:04:07 dsl Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Waldi Ravens. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Waldi Ravens. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/types.h> 34 #include <stdlib.h> 35 #include <stdio.h> 36 #include "libtos.h" 37 #include "aptck.h" 38 #include "ahdilbl.h" 39 #include "disklbl.h" 40 41 static int dkcksum PROTO((struct disklabel *)); 42 static int bsd_label PROTO((disk_t *, u_int)); 43 static int ahdi_label PROTO((disk_t *)); 44 static int ahdi_display PROTO((disk_t *)); 45 static u_int ahdi_getparts PROTO((disk_t *, u_int, u_int)); 46 47 int 48 readdisklabel(disk_t *dd) 49 { 50 int e; 51 52 printf("Device : %s (%s) [%s]\n", dd->sname, dd->fname, 53 dd->product); 54 printf("Medium size: %lu sectors\n", (u_long)dd->msize); 55 printf("Sector size: %lu bytes\n\n", (u_long)dd->bsize); 56 57 e = bsd_label(dd, LABELSECTOR); 58 if (e < 0) { 59 printf("Device I/O error (hardware problem?)\n\n"); 60 return(-1); 61 } 62 if (!e) { 63 printf("NetBSD/Atari format, boot block: " 64 "sector %u labeloffset %u\n\n", 65 dd->bblock, dd->lblofs); 66 return(0); 67 } 68 69 e = ahdi_label(dd); 70 if (e < 0) { 71 printf("Device I/O error (hardware problem?)\n\n"); 72 return(-1); 73 } 74 if (!e) { 75 printf("AHDI format, NetBSD boot block: "); 76 if (dd->bblock != NO_BOOT_BLOCK) 77 printf("sector %u labeloffset %u\n\n", 78 dd->bblock, dd->lblofs); 79 else printf("none\n\n"); 80 return(0); 81 } 82 83 printf("Unknown label format.\n\n"); 84 return(-1); 85 } 86 87 static int 88 bsd_label(disk_t *dd, u_int offset) 89 { 90 u_char *bblk; 91 u_int nsec; 92 int rv; 93 94 nsec = (BBMINSIZE + (dd->bsize - 1)) / dd->bsize; 95 bblk = disk_read(dd, offset, nsec); 96 if (bblk) { 97 u_int *end, *p; 98 99 end = (u_int *)&bblk[BBMINSIZE - sizeof(struct disklabel)]; 100 rv = 1; 101 for (p = (u_int *)bblk; p < end; ++p) { 102 struct disklabel *dl = (struct disklabel *)&p[1]; 103 if ( ( (p[0] == NBDAMAGIC && offset == 0) 104 || (p[0] == AHDIMAGIC && offset != 0) 105 || (u_char *)dl - bblk == 7168 106 ) 107 && dl->d_npartitions <= MAXPARTITIONS 108 && dl->d_magic2 == DISKMAGIC 109 && dl->d_magic == DISKMAGIC 110 && dkcksum(dl) == 0 111 ) { 112 dd->lblofs = (u_char *)dl - bblk; 113 dd->bblock = offset; 114 rv = 0; 115 break; 116 } 117 } 118 free(bblk); 119 } 120 else rv = -1; 121 122 return(rv); 123 } 124 125 static int 126 dkcksum(struct disklabel *dl) 127 { 128 u_short *start, *end, sum = 0; 129 130 start = (u_short *)dl; 131 end = (u_short *)&dl->d_partitions[dl->d_npartitions]; 132 while (start < end) 133 sum ^= *start++; 134 return(sum); 135 } 136 137 int 138 ahdi_label(disk_t *dd) 139 { 140 u_int i; 141 int e; 142 143 /* 144 * The AHDI format requires a specific block size. 145 */ 146 if (dd->bsize != AHDI_BSIZE) 147 return(1); 148 149 /* 150 * Fetch the AHDI partition descriptors. 151 */ 152 i = ahdi_getparts(dd, AHDI_BBLOCK, AHDI_BBLOCK); 153 if (i) { 154 if (i < dd->msize) 155 return(-1); /* disk read error */ 156 else return(1); /* reading past end of medium */ 157 } 158 159 /* 160 * Display and perform sanity checks. 161 */ 162 i = ahdi_display(dd); 163 if (i) 164 return(i); 165 166 /* 167 * Search for a NetBSD disk label 168 */ 169 dd->bblock = NO_BOOT_BLOCK; 170 for (i = 0; i < dd->nparts; ++i) { 171 part_t *pd = &dd->parts[i]; 172 u_int id = *((u_int32_t *)&pd->id) >> 8; 173 if (id == AHDI_PID_NBD || id == AHDI_PID_RAW) { 174 u_int offs = pd->start; 175 if ((e = bsd_label(dd, offs)) < 0) { 176 return(e); /* I/O error */ 177 } 178 if (!e) { 179 dd->bblock = offs; /* got it */ 180 return(0); 181 } 182 if (id == AHDI_PID_NBD && dd->bblock == NO_BOOT_BLOCK) 183 dd->bblock = offs; 184 } 185 } 186 return(0); 187 } 188 189 static int 190 root_cmp(const void *x1, const void *x2) 191 { 192 const u_int *r1 = x1, 193 *r2 = x2; 194 195 if (*r1 < *r2) 196 return(-1); 197 if (*r1 > *r2) 198 return(1); 199 return(0); 200 } 201 202 static int 203 part_cmp(const void *x1, const void *x2) 204 { 205 const part_t *p1 = x1, 206 *p2 = x2; 207 208 if (p1->start < p2->start) 209 return(-1); 210 if (p1->start > p2->start) 211 return(1); 212 if (p1->end < p2->end) 213 return(-1); 214 if (p1->end > p2->end) 215 return(1); 216 if (p1->rsec < p2->rsec) 217 return(-1); 218 if (p1->rsec > p2->rsec) 219 return(1); 220 if (p1->rent < p2->rent) 221 return(-1); 222 if (p1->rent > p2->rent) 223 return(1); 224 return(0); 225 } 226 227 static int 228 ahdi_display(disk_t *dd) 229 { 230 int i, j, rv = 0; 231 232 printf("Start of bad sector list : %u\n", dd->bslst); 233 if (dd->bslst == 0) { 234 printf("* Illegal value (zero) *\n"); rv = 1; 235 } 236 printf("End of bad sector list : %u\n", dd->bslend); 237 if (dd->bslend == 0) { 238 printf("* Illegal value (zero) *\n"); rv = 1; 239 } 240 printf("Medium size (in root sec): %u\n", dd->hdsize); 241 if (dd->hdsize == 0) { 242 printf("* Illegal value (zero) *\n"); rv = 1; 243 } 244 245 qsort(dd->roots, dd->nroots, sizeof *dd->roots, root_cmp); 246 qsort(dd->parts, dd->nparts, sizeof *dd->parts, part_cmp); 247 printf("\n root desc id start end MBs\n"); 248 249 for (i = 0; i < dd->nparts; ++i) { 250 part_t *p1 = &dd->parts[i]; 251 u_int megs = p1->end - p1->start + 1, 252 blpm = (1024 * 1024) / dd->bsize; 253 megs = (megs + (blpm >> 1)) / blpm; 254 printf("%8u %4u %s %8u %8u (%3u)\n", 255 p1->rsec, p1->rent, p1->id, 256 p1->start, p1->end, megs); 257 for (j = 0; j < dd->nroots; ++j) { 258 u_int aux = dd->roots[j]; 259 if (aux >= p1->start && aux <= p1->end) { 260 printf("FATAL: auxiliary root at %u\n", aux); 261 rv = 1; 262 } 263 } 264 for (j = i; j--;) { 265 part_t *p2 = &dd->parts[j]; 266 if (p1->start >= p2->start && p1->start <= p2->end) { 267 printf("FATAL: clash with %u/%u\n", p2->rsec, p2->rent); 268 rv = 1; 269 } 270 if (p2->start >= p1->start && p2->start <= p1->end) { 271 printf("FATAL: clash with %u/%u\n", p2->rsec, p2->rent); 272 rv = 1; 273 } 274 } 275 if (p1->start >= dd->bslst && p1->start <= dd->bslend) { 276 printf("FATAL: partition overlaps with bad sector list\n"); 277 rv = 1; 278 } 279 if (dd->bslst >= p1->start && dd->bslst <= p1->end) { 280 printf("FATAL: partition overlaps with bad sector list\n"); 281 rv = 1; 282 } 283 } 284 285 printf("\nTotal number of auxiliary roots: %u\n", dd->nroots); 286 printf("Total number of partitions : %u\n", dd->nparts); 287 if (dd->nparts == 0) { 288 printf("* Weird # of partitions (zero) *\n"); rv = 1; 289 } 290 if (dd->nparts > AHDI_MAXPARTS) { 291 printf("* Too many AHDI partitions for the default NetBSD " 292 "kernel *\n Increase MAXAUXROOTS in src/sys/arch/" 293 "atari/include/disklabel.h\n to at least %u, and " 294 "recompile the NetBSD kernel.\n", dd->nroots); 295 rv = -1; 296 } 297 return(rv); 298 } 299 300 static u_int 301 ahdi_getparts(dd, rsec, esec) 302 disk_t *dd; 303 u_int rsec, 304 esec; 305 { 306 struct ahdi_part *part, *end; 307 struct ahdi_root *root; 308 u_int rv; 309 310 root = disk_read(dd, rsec, 1); 311 if (!root) { 312 rv = rsec + (rsec == 0); 313 goto done; 314 } 315 316 if (rsec == AHDI_BBLOCK) 317 end = &root->ar_parts[AHDI_MAXRPD]; 318 else end = &root->ar_parts[AHDI_MAXARPD]; 319 for (part = root->ar_parts; part < end; ++part) { 320 u_int id = *((u_int32_t *)&part->ap_flg); 321 if (!(id & 0x01000000)) 322 continue; 323 if ((id &= 0x00ffffff) == AHDI_PID_XGM) { 324 u_int offs = part->ap_offs + esec; 325 u_int i = ++dd->nroots; 326 dd->roots = xrealloc(dd->roots, i * sizeof *dd->roots); 327 dd->roots[--i] = offs; 328 rv = ahdi_getparts(dd, offs, 329 esec == AHDI_BBLOCK ? offs : esec); 330 if (rv) 331 goto done; 332 } else { 333 part_t *p; 334 u_int i = ++dd->nparts; 335 dd->parts = xrealloc(dd->parts, i * sizeof *dd->parts); 336 p = &dd->parts[--i]; 337 *((u_int32_t *)&p->id) = id << 8; 338 p->start = part->ap_offs + rsec; 339 p->end = p->start + part->ap_size - 1; 340 p->rsec = rsec; 341 p->rent = part - root->ar_parts; 342 } 343 } 344 dd->hdsize = root->ar_hdsize; 345 dd->bslst = root->ar_bslst; 346 dd->bslend = root->ar_bslst + root->ar_bslsize - 1; 347 rv = 0; 348 done: 349 free(root); 350 return(rv); 351 } 352