1 /*- 2 * Copyright (c) 2007 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/bio.h> 32 #include <sys/disklabel.h> 33 #include <sys/endian.h> 34 #include <sys/kernel.h> 35 #include <sys/kobj.h> 36 #include <sys/limits.h> 37 #include <sys/lock.h> 38 #include <sys/malloc.h> 39 #include <sys/mutex.h> 40 #include <sys/queue.h> 41 #include <sys/sbuf.h> 42 #include <sys/systm.h> 43 #include <sys/sysctl.h> 44 #include <geom/geom.h> 45 #include <geom/part/g_part.h> 46 47 #include "g_part_if.h" 48 49 #define BOOT1_SIZE 512 50 #define LABEL_SIZE 512 51 #define BOOT2_OFF (BOOT1_SIZE + LABEL_SIZE) 52 #define BOOT2_SIZE (BBSIZE - BOOT2_OFF) 53 54 FEATURE(geom_part_bsd, "GEOM partitioning class for BSD disklabels"); 55 56 struct g_part_bsd_table { 57 struct g_part_table base; 58 u_char *bbarea; 59 uint32_t offset; 60 }; 61 62 struct g_part_bsd_entry { 63 struct g_part_entry base; 64 struct partition part; 65 }; 66 67 static int g_part_bsd_add(struct g_part_table *, struct g_part_entry *, 68 struct g_part_parms *); 69 static int g_part_bsd_bootcode(struct g_part_table *, struct g_part_parms *); 70 static int g_part_bsd_create(struct g_part_table *, struct g_part_parms *); 71 static int g_part_bsd_destroy(struct g_part_table *, struct g_part_parms *); 72 static void g_part_bsd_dumpconf(struct g_part_table *, struct g_part_entry *, 73 struct sbuf *, const char *); 74 static int g_part_bsd_dumpto(struct g_part_table *, struct g_part_entry *); 75 static int g_part_bsd_modify(struct g_part_table *, struct g_part_entry *, 76 struct g_part_parms *); 77 static const char *g_part_bsd_name(struct g_part_table *, struct g_part_entry *, 78 char *, size_t); 79 static int g_part_bsd_probe(struct g_part_table *, struct g_consumer *); 80 static int g_part_bsd_read(struct g_part_table *, struct g_consumer *); 81 static const char *g_part_bsd_type(struct g_part_table *, struct g_part_entry *, 82 char *, size_t); 83 static int g_part_bsd_write(struct g_part_table *, struct g_consumer *); 84 static int g_part_bsd_resize(struct g_part_table *, struct g_part_entry *, 85 struct g_part_parms *); 86 87 static kobj_method_t g_part_bsd_methods[] = { 88 KOBJMETHOD(g_part_add, g_part_bsd_add), 89 KOBJMETHOD(g_part_bootcode, g_part_bsd_bootcode), 90 KOBJMETHOD(g_part_create, g_part_bsd_create), 91 KOBJMETHOD(g_part_destroy, g_part_bsd_destroy), 92 KOBJMETHOD(g_part_dumpconf, g_part_bsd_dumpconf), 93 KOBJMETHOD(g_part_dumpto, g_part_bsd_dumpto), 94 KOBJMETHOD(g_part_modify, g_part_bsd_modify), 95 KOBJMETHOD(g_part_resize, g_part_bsd_resize), 96 KOBJMETHOD(g_part_name, g_part_bsd_name), 97 KOBJMETHOD(g_part_probe, g_part_bsd_probe), 98 KOBJMETHOD(g_part_read, g_part_bsd_read), 99 KOBJMETHOD(g_part_type, g_part_bsd_type), 100 KOBJMETHOD(g_part_write, g_part_bsd_write), 101 { 0, 0 } 102 }; 103 104 static struct g_part_scheme g_part_bsd_scheme = { 105 "BSD", 106 g_part_bsd_methods, 107 sizeof(struct g_part_bsd_table), 108 .gps_entrysz = sizeof(struct g_part_bsd_entry), 109 .gps_minent = 8, 110 .gps_maxent = 20, /* Only 22 entries fit in 512 byte sectors */ 111 .gps_bootcodesz = BBSIZE, 112 }; 113 G_PART_SCHEME_DECLARE(g_part_bsd); 114 115 static struct g_part_bsd_alias { 116 uint8_t type; 117 int alias; 118 } bsd_alias_match[] = { 119 { FS_BSDFFS, G_PART_ALIAS_FREEBSD_UFS }, 120 { FS_SWAP, G_PART_ALIAS_FREEBSD_SWAP }, 121 { FS_ZFS, G_PART_ALIAS_FREEBSD_ZFS }, 122 { FS_VINUM, G_PART_ALIAS_FREEBSD_VINUM }, 123 { FS_NANDFS, G_PART_ALIAS_FREEBSD_NANDFS }, 124 { FS_HAMMER, G_PART_ALIAS_DFBSD_HAMMER }, 125 { FS_HAMMER2, G_PART_ALIAS_DFBSD_HAMMER2 }, 126 }; 127 128 static int 129 bsd_parse_type(const char *type, uint8_t *fstype) 130 { 131 const char *alias; 132 char *endp; 133 long lt; 134 int i; 135 136 if (type[0] == '!') { 137 lt = strtol(type + 1, &endp, 0); 138 if (type[1] == '\0' || *endp != '\0' || lt <= 0 || lt >= 256) 139 return (EINVAL); 140 *fstype = (u_int)lt; 141 return (0); 142 } 143 for (i = 0; 144 i < sizeof(bsd_alias_match) / sizeof(bsd_alias_match[0]); i++) { 145 alias = g_part_alias_name(bsd_alias_match[i].alias); 146 if (strcasecmp(type, alias) == 0) { 147 *fstype = bsd_alias_match[i].type; 148 return (0); 149 } 150 } 151 return (EINVAL); 152 } 153 154 static int 155 g_part_bsd_add(struct g_part_table *basetable, struct g_part_entry *baseentry, 156 struct g_part_parms *gpp) 157 { 158 struct g_part_bsd_entry *entry; 159 struct g_part_bsd_table *table; 160 161 if (gpp->gpp_parms & G_PART_PARM_LABEL) 162 return (EINVAL); 163 164 entry = (struct g_part_bsd_entry *)baseentry; 165 table = (struct g_part_bsd_table *)basetable; 166 167 entry->part.p_size = gpp->gpp_size; 168 entry->part.p_offset = gpp->gpp_start + table->offset; 169 entry->part.p_fsize = 0; 170 entry->part.p_frag = 0; 171 entry->part.p_cpg = 0; 172 return (bsd_parse_type(gpp->gpp_type, &entry->part.p_fstype)); 173 } 174 175 static int 176 g_part_bsd_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp) 177 { 178 struct g_part_bsd_table *table; 179 const u_char *codeptr; 180 181 if (gpp->gpp_codesize != BOOT1_SIZE && gpp->gpp_codesize != BBSIZE) 182 return (ENODEV); 183 184 table = (struct g_part_bsd_table *)basetable; 185 codeptr = gpp->gpp_codeptr; 186 bcopy(codeptr, table->bbarea, BOOT1_SIZE); 187 if (gpp->gpp_codesize == BBSIZE) 188 bcopy(codeptr + BOOT2_OFF, table->bbarea + BOOT2_OFF, 189 BOOT2_SIZE); 190 return (0); 191 } 192 193 static int 194 g_part_bsd_create(struct g_part_table *basetable, struct g_part_parms *gpp) 195 { 196 struct g_provider *pp; 197 struct g_part_entry *baseentry; 198 struct g_part_bsd_entry *entry; 199 struct g_part_bsd_table *table; 200 u_char *ptr; 201 uint32_t msize, ncyls, secpercyl; 202 203 pp = gpp->gpp_provider; 204 205 if (pp->sectorsize < sizeof(struct disklabel)) 206 return (ENOSPC); 207 if (BBSIZE % pp->sectorsize) 208 return (ENOTBLK); 209 210 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX); 211 secpercyl = basetable->gpt_sectors * basetable->gpt_heads; 212 ncyls = msize / secpercyl; 213 214 table = (struct g_part_bsd_table *)basetable; 215 table->bbarea = g_malloc(BBSIZE, M_WAITOK | M_ZERO); 216 ptr = table->bbarea + pp->sectorsize; 217 218 le32enc(ptr + 0, DISKMAGIC); /* d_magic */ 219 le32enc(ptr + 40, pp->sectorsize); /* d_secsize */ 220 le32enc(ptr + 44, basetable->gpt_sectors); /* d_nsectors */ 221 le32enc(ptr + 48, basetable->gpt_heads); /* d_ntracks */ 222 le32enc(ptr + 52, ncyls); /* d_ncylinders */ 223 le32enc(ptr + 56, secpercyl); /* d_secpercyl */ 224 le32enc(ptr + 60, msize); /* d_secperunit */ 225 le16enc(ptr + 72, 3600); /* d_rpm */ 226 le32enc(ptr + 132, DISKMAGIC); /* d_magic2 */ 227 le16enc(ptr + 138, basetable->gpt_entries); /* d_npartitions */ 228 le32enc(ptr + 140, BBSIZE); /* d_bbsize */ 229 230 basetable->gpt_first = 0; 231 basetable->gpt_last = msize - 1; 232 basetable->gpt_isleaf = 1; 233 234 baseentry = g_part_new_entry(basetable, RAW_PART + 1, 235 basetable->gpt_first, basetable->gpt_last); 236 baseentry->gpe_internal = 1; 237 entry = (struct g_part_bsd_entry *)baseentry; 238 entry->part.p_size = basetable->gpt_last + 1; 239 entry->part.p_offset = table->offset; 240 241 return (0); 242 } 243 244 static int 245 g_part_bsd_destroy(struct g_part_table *basetable, struct g_part_parms *gpp) 246 { 247 struct g_part_bsd_table *table; 248 249 table = (struct g_part_bsd_table *)basetable; 250 if (table->bbarea != NULL) 251 g_free(table->bbarea); 252 table->bbarea = NULL; 253 254 /* Wipe the second sector to clear the partitioning. */ 255 basetable->gpt_smhead |= 2; 256 return (0); 257 } 258 259 static void 260 g_part_bsd_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry, 261 struct sbuf *sb, const char *indent) 262 { 263 struct g_part_bsd_entry *entry; 264 265 entry = (struct g_part_bsd_entry *)baseentry; 266 if (indent == NULL) { 267 /* conftxt: libdisk compatibility */ 268 sbuf_printf(sb, " xs BSD xt %u", entry->part.p_fstype); 269 } else if (entry != NULL) { 270 /* confxml: partition entry information */ 271 sbuf_printf(sb, "%s<rawtype>%u</rawtype>\n", indent, 272 entry->part.p_fstype); 273 } else { 274 /* confxml: scheme information */ 275 } 276 } 277 278 static int 279 g_part_bsd_dumpto(struct g_part_table *table, struct g_part_entry *baseentry) 280 { 281 struct g_part_bsd_entry *entry; 282 283 /* Allow dumping to a swap partition or an unused partition. */ 284 entry = (struct g_part_bsd_entry *)baseentry; 285 return ((entry->part.p_fstype == FS_UNUSED || 286 entry->part.p_fstype == FS_SWAP) ? 1 : 0); 287 } 288 289 static int 290 g_part_bsd_modify(struct g_part_table *basetable, 291 struct g_part_entry *baseentry, struct g_part_parms *gpp) 292 { 293 struct g_part_bsd_entry *entry; 294 295 if (gpp->gpp_parms & G_PART_PARM_LABEL) 296 return (EINVAL); 297 298 entry = (struct g_part_bsd_entry *)baseentry; 299 if (gpp->gpp_parms & G_PART_PARM_TYPE) 300 return (bsd_parse_type(gpp->gpp_type, &entry->part.p_fstype)); 301 return (0); 302 } 303 304 static void 305 bsd_set_rawsize(struct g_part_table *basetable, struct g_provider *pp) 306 { 307 struct g_part_bsd_table *table; 308 struct g_part_bsd_entry *entry; 309 struct g_part_entry *baseentry; 310 uint32_t msize; 311 312 table = (struct g_part_bsd_table *)basetable; 313 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX); 314 le32enc(table->bbarea + pp->sectorsize + 60, msize); /* d_secperunit */ 315 basetable->gpt_last = msize - 1; 316 LIST_FOREACH(baseentry, &basetable->gpt_entry, gpe_entry) { 317 if (baseentry->gpe_index != RAW_PART + 1) 318 continue; 319 baseentry->gpe_end = basetable->gpt_last; 320 entry = (struct g_part_bsd_entry *)baseentry; 321 entry->part.p_size = msize; 322 return; 323 } 324 } 325 326 static int 327 g_part_bsd_resize(struct g_part_table *basetable, 328 struct g_part_entry *baseentry, struct g_part_parms *gpp) 329 { 330 struct g_part_bsd_entry *entry; 331 struct g_provider *pp; 332 333 if (baseentry == NULL) { 334 pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider; 335 bsd_set_rawsize(basetable, pp); 336 return (0); 337 } 338 entry = (struct g_part_bsd_entry *)baseentry; 339 baseentry->gpe_end = baseentry->gpe_start + gpp->gpp_size - 1; 340 entry->part.p_size = gpp->gpp_size; 341 342 return (0); 343 } 344 345 static const char * 346 g_part_bsd_name(struct g_part_table *table, struct g_part_entry *baseentry, 347 char *buf, size_t bufsz) 348 { 349 350 snprintf(buf, bufsz, "%c", 'a' + baseentry->gpe_index - 1); 351 return (buf); 352 } 353 354 static int 355 g_part_bsd_probe(struct g_part_table *table, struct g_consumer *cp) 356 { 357 struct g_provider *pp; 358 u_char *buf; 359 uint32_t magic1, magic2; 360 int error; 361 362 pp = cp->provider; 363 364 /* Sanity-check the provider. */ 365 if (pp->sectorsize < sizeof(struct disklabel) || 366 pp->mediasize < BBSIZE) 367 return (ENOSPC); 368 if (BBSIZE % pp->sectorsize) 369 return (ENOTBLK); 370 371 /* Check that there's a disklabel. */ 372 buf = g_read_data(cp, pp->sectorsize, pp->sectorsize, &error); 373 if (buf == NULL) 374 return (error); 375 magic1 = le32dec(buf + 0); 376 magic2 = le32dec(buf + 132); 377 g_free(buf); 378 return ((magic1 == DISKMAGIC && magic2 == DISKMAGIC) 379 ? G_PART_PROBE_PRI_HIGH : ENXIO); 380 } 381 382 static int 383 g_part_bsd_read(struct g_part_table *basetable, struct g_consumer *cp) 384 { 385 struct g_provider *pp; 386 struct g_part_bsd_table *table; 387 struct g_part_entry *baseentry; 388 struct g_part_bsd_entry *entry; 389 struct partition part; 390 u_char *buf, *p; 391 off_t chs, msize; 392 u_int sectors, heads; 393 int error, index; 394 395 pp = cp->provider; 396 table = (struct g_part_bsd_table *)basetable; 397 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX); 398 399 table->bbarea = g_read_data(cp, 0, BBSIZE, &error); 400 if (table->bbarea == NULL) 401 return (error); 402 403 buf = table->bbarea + pp->sectorsize; 404 405 if (le32dec(buf + 40) != pp->sectorsize) 406 goto invalid_label; 407 sectors = le32dec(buf + 44); 408 if (sectors < 1 || sectors > 255) 409 goto invalid_label; 410 if (sectors != basetable->gpt_sectors && !basetable->gpt_fixgeom) { 411 g_part_geometry_heads(msize, sectors, &chs, &heads); 412 if (chs != 0) { 413 basetable->gpt_sectors = sectors; 414 basetable->gpt_heads = heads; 415 } 416 } 417 heads = le32dec(buf + 48); 418 if (heads < 1 || heads > 255) 419 goto invalid_label; 420 if (heads != basetable->gpt_heads && !basetable->gpt_fixgeom) 421 basetable->gpt_heads = heads; 422 423 chs = le32dec(buf + 60); 424 if (chs < 1) 425 goto invalid_label; 426 /* Fix-up a sysinstall bug. */ 427 if (chs > msize) { 428 chs = msize; 429 le32enc(buf + 60, msize); 430 } 431 432 basetable->gpt_first = 0; 433 basetable->gpt_last = msize - 1; 434 basetable->gpt_isleaf = 1; 435 436 basetable->gpt_entries = le16dec(buf + 138); 437 if (basetable->gpt_entries < g_part_bsd_scheme.gps_minent || 438 basetable->gpt_entries > g_part_bsd_scheme.gps_maxent) 439 goto invalid_label; 440 441 table->offset = le32dec(buf + 148 + RAW_PART * 16 + 4); 442 for (index = basetable->gpt_entries - 1; index >= 0; index--) { 443 p = buf + 148 + index * 16; 444 part.p_size = le32dec(p + 0); 445 part.p_offset = le32dec(p + 4); 446 part.p_fsize = le32dec(p + 8); 447 part.p_fstype = p[12]; 448 part.p_frag = p[13]; 449 part.p_cpg = le16dec(p + 14); 450 if (part.p_size == 0) 451 continue; 452 if (part.p_offset < table->offset) 453 continue; 454 if (part.p_offset - table->offset > basetable->gpt_last) 455 goto invalid_label; 456 baseentry = g_part_new_entry(basetable, index + 1, 457 part.p_offset - table->offset, 458 part.p_offset - table->offset + part.p_size - 1); 459 entry = (struct g_part_bsd_entry *)baseentry; 460 entry->part = part; 461 if (index == RAW_PART) 462 baseentry->gpe_internal = 1; 463 } 464 465 return (0); 466 467 invalid_label: 468 printf("GEOM: %s: invalid disklabel.\n", pp->name); 469 g_free(table->bbarea); 470 table->bbarea = NULL; 471 return (EINVAL); 472 } 473 474 static const char * 475 g_part_bsd_type(struct g_part_table *basetable, struct g_part_entry *baseentry, 476 char *buf, size_t bufsz) 477 { 478 struct g_part_bsd_entry *entry; 479 int type; 480 481 entry = (struct g_part_bsd_entry *)baseentry; 482 type = entry->part.p_fstype; 483 if (type == FS_NANDFS) 484 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_NANDFS)); 485 if (type == FS_SWAP) 486 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP)); 487 if (type == FS_BSDFFS) 488 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS)); 489 if (type == FS_VINUM) 490 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM)); 491 if (type == FS_ZFS) 492 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS)); 493 snprintf(buf, bufsz, "!%d", type); 494 return (buf); 495 } 496 497 static int 498 g_part_bsd_write(struct g_part_table *basetable, struct g_consumer *cp) 499 { 500 struct g_provider *pp; 501 struct g_part_entry *baseentry; 502 struct g_part_bsd_entry *entry; 503 struct g_part_bsd_table *table; 504 uint16_t sum; 505 u_char *label, *p, *pe; 506 int error, index; 507 508 pp = cp->provider; 509 table = (struct g_part_bsd_table *)basetable; 510 baseentry = LIST_FIRST(&basetable->gpt_entry); 511 label = table->bbarea + pp->sectorsize; 512 for (index = 1; index <= basetable->gpt_entries; index++) { 513 p = label + 148 + (index - 1) * 16; 514 entry = (baseentry != NULL && index == baseentry->gpe_index) 515 ? (struct g_part_bsd_entry *)baseentry : NULL; 516 if (entry != NULL && !baseentry->gpe_deleted) { 517 le32enc(p + 0, entry->part.p_size); 518 le32enc(p + 4, entry->part.p_offset); 519 le32enc(p + 8, entry->part.p_fsize); 520 p[12] = entry->part.p_fstype; 521 p[13] = entry->part.p_frag; 522 le16enc(p + 14, entry->part.p_cpg); 523 } else 524 bzero(p, 16); 525 526 if (entry != NULL) 527 baseentry = LIST_NEXT(baseentry, gpe_entry); 528 } 529 530 /* Calculate checksum. */ 531 le16enc(label + 136, 0); 532 pe = label + 148 + basetable->gpt_entries * 16; 533 sum = 0; 534 for (p = label; p < pe; p += 2) 535 sum ^= le16dec(p); 536 le16enc(label + 136, sum); 537 538 error = g_write_data(cp, 0, table->bbarea, BBSIZE); 539 return (error); 540 } 541