1 /*- 2 * Copyright (c) 2007-2009 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 "opt_geom.h" 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/bio.h> 34 #include <sys/diskmbr.h> 35 #include <sys/endian.h> 36 #include <sys/kernel.h> 37 #include <sys/kobj.h> 38 #include <sys/limits.h> 39 #include <sys/lock.h> 40 #include <sys/malloc.h> 41 #include <sys/mutex.h> 42 #include <sys/queue.h> 43 #include <sys/sbuf.h> 44 #include <sys/systm.h> 45 #include <sys/sysctl.h> 46 #include <geom/geom.h> 47 #include <geom/part/g_part.h> 48 49 #include "g_part_if.h" 50 51 FEATURE(geom_part_ebr, 52 "GEOM partitioning class for extended boot records support"); 53 #if defined(GEOM_PART_EBR_COMPAT) 54 FEATURE(geom_part_ebr_compat, 55 "GEOM EBR partitioning class: backward-compatible partition names"); 56 #endif 57 58 #define EBRSIZE 512 59 60 struct g_part_ebr_table { 61 struct g_part_table base; 62 #ifndef GEOM_PART_EBR_COMPAT 63 u_char ebr[EBRSIZE]; 64 #endif 65 }; 66 67 struct g_part_ebr_entry { 68 struct g_part_entry base; 69 struct dos_partition ent; 70 }; 71 72 static int g_part_ebr_add(struct g_part_table *, struct g_part_entry *, 73 struct g_part_parms *); 74 static int g_part_ebr_create(struct g_part_table *, struct g_part_parms *); 75 static int g_part_ebr_destroy(struct g_part_table *, struct g_part_parms *); 76 static void g_part_ebr_dumpconf(struct g_part_table *, struct g_part_entry *, 77 struct sbuf *, const char *); 78 static int g_part_ebr_dumpto(struct g_part_table *, struct g_part_entry *); 79 #if defined(GEOM_PART_EBR_COMPAT) 80 static void g_part_ebr_fullname(struct g_part_table *, struct g_part_entry *, 81 struct sbuf *, const char *); 82 #endif 83 static int g_part_ebr_modify(struct g_part_table *, struct g_part_entry *, 84 struct g_part_parms *); 85 static const char *g_part_ebr_name(struct g_part_table *, struct g_part_entry *, 86 char *, size_t); 87 static int g_part_ebr_precheck(struct g_part_table *, enum g_part_ctl, 88 struct g_part_parms *); 89 static int g_part_ebr_probe(struct g_part_table *, struct g_consumer *); 90 static int g_part_ebr_read(struct g_part_table *, struct g_consumer *); 91 static int g_part_ebr_setunset(struct g_part_table *, struct g_part_entry *, 92 const char *, unsigned int); 93 static const char *g_part_ebr_type(struct g_part_table *, struct g_part_entry *, 94 char *, size_t); 95 static int g_part_ebr_write(struct g_part_table *, struct g_consumer *); 96 97 static kobj_method_t g_part_ebr_methods[] = { 98 KOBJMETHOD(g_part_add, g_part_ebr_add), 99 KOBJMETHOD(g_part_create, g_part_ebr_create), 100 KOBJMETHOD(g_part_destroy, g_part_ebr_destroy), 101 KOBJMETHOD(g_part_dumpconf, g_part_ebr_dumpconf), 102 KOBJMETHOD(g_part_dumpto, g_part_ebr_dumpto), 103 #if defined(GEOM_PART_EBR_COMPAT) 104 KOBJMETHOD(g_part_fullname, g_part_ebr_fullname), 105 #endif 106 KOBJMETHOD(g_part_modify, g_part_ebr_modify), 107 KOBJMETHOD(g_part_name, g_part_ebr_name), 108 KOBJMETHOD(g_part_precheck, g_part_ebr_precheck), 109 KOBJMETHOD(g_part_probe, g_part_ebr_probe), 110 KOBJMETHOD(g_part_read, g_part_ebr_read), 111 KOBJMETHOD(g_part_setunset, g_part_ebr_setunset), 112 KOBJMETHOD(g_part_type, g_part_ebr_type), 113 KOBJMETHOD(g_part_write, g_part_ebr_write), 114 { 0, 0 } 115 }; 116 117 static struct g_part_scheme g_part_ebr_scheme = { 118 "EBR", 119 g_part_ebr_methods, 120 sizeof(struct g_part_ebr_table), 121 .gps_entrysz = sizeof(struct g_part_ebr_entry), 122 .gps_minent = 1, 123 .gps_maxent = INT_MAX, 124 }; 125 G_PART_SCHEME_DECLARE(g_part_ebr); 126 127 static struct g_part_ebr_alias { 128 u_char typ; 129 int alias; 130 } ebr_alias_match[] = { 131 { DOSPTYP_386BSD, G_PART_ALIAS_FREEBSD }, 132 { DOSPTYP_NTFS, G_PART_ALIAS_MS_NTFS }, 133 { DOSPTYP_FAT32, G_PART_ALIAS_MS_FAT32 }, 134 { DOSPTYP_LINSWP, G_PART_ALIAS_LINUX_SWAP }, 135 { DOSPTYP_LINUX, G_PART_ALIAS_LINUX_DATA }, 136 { DOSPTYP_LINLVM, G_PART_ALIAS_LINUX_LVM }, 137 { DOSPTYP_LINRAID, G_PART_ALIAS_LINUX_RAID }, 138 }; 139 140 static void ebr_set_chs(struct g_part_table *, uint32_t, u_char *, u_char *, 141 u_char *); 142 143 static void 144 ebr_entry_decode(const char *p, struct dos_partition *ent) 145 { 146 ent->dp_flag = p[0]; 147 ent->dp_shd = p[1]; 148 ent->dp_ssect = p[2]; 149 ent->dp_scyl = p[3]; 150 ent->dp_typ = p[4]; 151 ent->dp_ehd = p[5]; 152 ent->dp_esect = p[6]; 153 ent->dp_ecyl = p[7]; 154 ent->dp_start = le32dec(p + 8); 155 ent->dp_size = le32dec(p + 12); 156 } 157 158 static void 159 ebr_entry_link(struct g_part_table *table, uint32_t start, uint32_t end, 160 u_char *buf) 161 { 162 163 buf[0] = 0 /* dp_flag */; 164 ebr_set_chs(table, start, &buf[3] /* dp_scyl */, &buf[1] /* dp_shd */, 165 &buf[2] /* dp_ssect */); 166 buf[4] = 5 /* dp_typ */; 167 ebr_set_chs(table, end, &buf[7] /* dp_ecyl */, &buf[5] /* dp_ehd */, 168 &buf[6] /* dp_esect */); 169 le32enc(buf + 8, start); 170 le32enc(buf + 12, end - start + 1); 171 } 172 173 static int 174 ebr_parse_type(const char *type, u_char *dp_typ) 175 { 176 const char *alias; 177 char *endp; 178 long lt; 179 int i; 180 181 if (type[0] == '!') { 182 lt = strtol(type + 1, &endp, 0); 183 if (type[1] == '\0' || *endp != '\0' || lt <= 0 || lt >= 256) 184 return (EINVAL); 185 *dp_typ = (u_char)lt; 186 return (0); 187 } 188 for (i = 0; 189 i < sizeof(ebr_alias_match) / sizeof(ebr_alias_match[0]); i++) { 190 alias = g_part_alias_name(ebr_alias_match[i].alias); 191 if (strcasecmp(type, alias) == 0) { 192 *dp_typ = ebr_alias_match[i].typ; 193 return (0); 194 } 195 } 196 return (EINVAL); 197 } 198 199 200 static void 201 ebr_set_chs(struct g_part_table *table, uint32_t lba, u_char *cylp, u_char *hdp, 202 u_char *secp) 203 { 204 uint32_t cyl, hd, sec; 205 206 sec = lba % table->gpt_sectors + 1; 207 lba /= table->gpt_sectors; 208 hd = lba % table->gpt_heads; 209 lba /= table->gpt_heads; 210 cyl = lba; 211 if (cyl > 1023) 212 sec = hd = cyl = ~0; 213 214 *cylp = cyl & 0xff; 215 *hdp = hd & 0xff; 216 *secp = (sec & 0x3f) | ((cyl >> 2) & 0xc0); 217 } 218 219 static int 220 g_part_ebr_add(struct g_part_table *basetable, struct g_part_entry *baseentry, 221 struct g_part_parms *gpp) 222 { 223 struct g_geom *gp; 224 struct g_provider *pp; 225 struct g_part_ebr_entry *entry; 226 uint32_t start, size, sectors; 227 228 if (gpp->gpp_parms & G_PART_PARM_LABEL) 229 return (EINVAL); 230 231 gp = basetable->gpt_gp; 232 pp = LIST_FIRST(&gp->consumer)->provider; 233 sectors = basetable->gpt_sectors; 234 235 entry = (struct g_part_ebr_entry *)baseentry; 236 237 start = gpp->gpp_start; 238 size = gpp->gpp_size; 239 if (size < 2 * sectors) 240 return (EINVAL); 241 if (start % sectors) { 242 size = size - sectors + (start % sectors); 243 start = start - (start % sectors) + sectors; 244 } 245 if (size % sectors) 246 size = size - (size % sectors); 247 if (size < 2 * sectors) 248 return (EINVAL); 249 250 if (baseentry->gpe_deleted) 251 bzero(&entry->ent, sizeof(entry->ent)); 252 253 KASSERT(baseentry->gpe_start <= start, ("%s", __func__)); 254 KASSERT(baseentry->gpe_end >= start + size - 1, ("%s", __func__)); 255 baseentry->gpe_index = (start / sectors) + 1; 256 baseentry->gpe_offset = (off_t)(start + sectors) * pp->sectorsize; 257 baseentry->gpe_start = start; 258 baseentry->gpe_end = start + size - 1; 259 entry->ent.dp_start = sectors; 260 entry->ent.dp_size = size - sectors; 261 ebr_set_chs(basetable, entry->ent.dp_start, &entry->ent.dp_scyl, 262 &entry->ent.dp_shd, &entry->ent.dp_ssect); 263 ebr_set_chs(basetable, baseentry->gpe_end, &entry->ent.dp_ecyl, 264 &entry->ent.dp_ehd, &entry->ent.dp_esect); 265 return (ebr_parse_type(gpp->gpp_type, &entry->ent.dp_typ)); 266 } 267 268 static int 269 g_part_ebr_create(struct g_part_table *basetable, struct g_part_parms *gpp) 270 { 271 char psn[8]; 272 struct g_consumer *cp; 273 struct g_provider *pp; 274 uint32_t msize; 275 int error; 276 277 pp = gpp->gpp_provider; 278 279 if (pp->sectorsize < EBRSIZE) 280 return (ENOSPC); 281 if (pp->sectorsize > 4096) 282 return (ENXIO); 283 284 /* Check that we have a parent and that it's a MBR. */ 285 if (basetable->gpt_depth == 0) 286 return (ENXIO); 287 cp = LIST_FIRST(&pp->consumers); 288 error = g_getattr("PART::scheme", cp, &psn); 289 if (error) 290 return (error); 291 if (strcmp(psn, "MBR")) 292 return (ENXIO); 293 294 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX); 295 basetable->gpt_first = 0; 296 basetable->gpt_last = msize - 1; 297 basetable->gpt_entries = msize / basetable->gpt_sectors; 298 return (0); 299 } 300 301 static int 302 g_part_ebr_destroy(struct g_part_table *basetable, struct g_part_parms *gpp) 303 { 304 305 /* Wipe the first sector to clear the partitioning. */ 306 basetable->gpt_smhead |= 1; 307 return (0); 308 } 309 310 static void 311 g_part_ebr_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry, 312 struct sbuf *sb, const char *indent) 313 { 314 struct g_part_ebr_entry *entry; 315 316 entry = (struct g_part_ebr_entry *)baseentry; 317 if (indent == NULL) { 318 /* conftxt: libdisk compatibility */ 319 sbuf_printf(sb, " xs MBREXT xt %u", entry->ent.dp_typ); 320 } else if (entry != NULL) { 321 /* confxml: partition entry information */ 322 sbuf_printf(sb, "%s<rawtype>%u</rawtype>\n", indent, 323 entry->ent.dp_typ); 324 if (entry->ent.dp_flag & 0x80) 325 sbuf_printf(sb, "%s<attrib>active</attrib>\n", indent); 326 } else { 327 /* confxml: scheme information */ 328 } 329 } 330 331 static int 332 g_part_ebr_dumpto(struct g_part_table *table, struct g_part_entry *baseentry) 333 { 334 struct g_part_ebr_entry *entry; 335 336 /* Allow dumping to a FreeBSD partition or Linux swap partition only. */ 337 entry = (struct g_part_ebr_entry *)baseentry; 338 return ((entry->ent.dp_typ == DOSPTYP_386BSD || 339 entry->ent.dp_typ == DOSPTYP_LINSWP) ? 1 : 0); 340 } 341 342 #if defined(GEOM_PART_EBR_COMPAT) 343 static void 344 g_part_ebr_fullname(struct g_part_table *table, struct g_part_entry *entry, 345 struct sbuf *sb, const char *pfx) 346 { 347 struct g_part_entry *iter; 348 u_int idx; 349 350 idx = 5; 351 LIST_FOREACH(iter, &table->gpt_entry, gpe_entry) { 352 if (iter == entry) 353 break; 354 idx++; 355 } 356 sbuf_printf(sb, "%.*s%u", (int)strlen(pfx) - 1, pfx, idx); 357 } 358 #endif 359 360 static int 361 g_part_ebr_modify(struct g_part_table *basetable, 362 struct g_part_entry *baseentry, struct g_part_parms *gpp) 363 { 364 struct g_part_ebr_entry *entry; 365 366 if (gpp->gpp_parms & G_PART_PARM_LABEL) 367 return (EINVAL); 368 369 entry = (struct g_part_ebr_entry *)baseentry; 370 if (gpp->gpp_parms & G_PART_PARM_TYPE) 371 return (ebr_parse_type(gpp->gpp_type, &entry->ent.dp_typ)); 372 return (0); 373 } 374 375 static const char * 376 g_part_ebr_name(struct g_part_table *table, struct g_part_entry *entry, 377 char *buf, size_t bufsz) 378 { 379 380 snprintf(buf, bufsz, "+%08u", entry->gpe_index); 381 return (buf); 382 } 383 384 static int 385 g_part_ebr_precheck(struct g_part_table *table, enum g_part_ctl req, 386 struct g_part_parms *gpp) 387 { 388 #if defined(GEOM_PART_EBR_COMPAT) 389 if (req == G_PART_CTL_DESTROY) 390 return (0); 391 return (ECANCELED); 392 #else 393 /* 394 * The index is a function of the start of the partition. 395 * This is not something the user can override, nor is it 396 * something the common code will do right. We can set the 397 * index now so that we get what we need. 398 */ 399 if (req == G_PART_CTL_ADD) 400 gpp->gpp_index = (gpp->gpp_start / table->gpt_sectors) + 1; 401 return (0); 402 #endif 403 } 404 405 static int 406 g_part_ebr_probe(struct g_part_table *table, struct g_consumer *cp) 407 { 408 char psn[8]; 409 struct g_provider *pp; 410 u_char *buf, *p; 411 int error, index, res; 412 uint16_t magic; 413 414 pp = cp->provider; 415 416 /* Sanity-check the provider. */ 417 if (pp->sectorsize < EBRSIZE || pp->mediasize < pp->sectorsize) 418 return (ENOSPC); 419 if (pp->sectorsize > 4096) 420 return (ENXIO); 421 422 /* Check that we have a parent and that it's a MBR. */ 423 if (table->gpt_depth == 0) 424 return (ENXIO); 425 error = g_getattr("PART::scheme", cp, &psn); 426 if (error) 427 return (error); 428 if (strcmp(psn, "MBR")) 429 return (ENXIO); 430 431 /* Check that there's a EBR. */ 432 buf = g_read_data(cp, 0L, pp->sectorsize, &error); 433 if (buf == NULL) 434 return (error); 435 436 /* We goto out on mismatch. */ 437 res = ENXIO; 438 439 magic = le16dec(buf + DOSMAGICOFFSET); 440 if (magic != DOSMAGIC) 441 goto out; 442 443 for (index = 0; index < 2; index++) { 444 p = buf + DOSPARTOFF + index * DOSPARTSIZE; 445 if (p[0] != 0 && p[0] != 0x80) 446 goto out; 447 } 448 res = G_PART_PROBE_PRI_NORM; 449 450 out: 451 g_free(buf); 452 return (res); 453 } 454 455 static int 456 g_part_ebr_read(struct g_part_table *basetable, struct g_consumer *cp) 457 { 458 struct dos_partition ent[2]; 459 struct g_provider *pp; 460 struct g_part_entry *baseentry; 461 struct g_part_ebr_table *table; 462 struct g_part_ebr_entry *entry; 463 u_char *buf; 464 off_t ofs, msize; 465 u_int lba; 466 int error, index; 467 468 pp = cp->provider; 469 table = (struct g_part_ebr_table *)basetable; 470 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX); 471 472 lba = 0; 473 while (1) { 474 ofs = (off_t)lba * pp->sectorsize; 475 buf = g_read_data(cp, ofs, pp->sectorsize, &error); 476 if (buf == NULL) 477 return (error); 478 479 ebr_entry_decode(buf + DOSPARTOFF + 0 * DOSPARTSIZE, ent + 0); 480 ebr_entry_decode(buf + DOSPARTOFF + 1 * DOSPARTSIZE, ent + 1); 481 482 /* The 3rd & 4th entries should be zeroes. */ 483 if (le64dec(buf + DOSPARTOFF + 2 * DOSPARTSIZE) + 484 le64dec(buf + DOSPARTOFF + 3 * DOSPARTSIZE) != 0) { 485 basetable->gpt_corrupt = 1; 486 printf("GEOM: %s: invalid entries in the EBR ignored.\n", 487 pp->name); 488 } 489 #ifndef GEOM_PART_EBR_COMPAT 490 /* Save the first EBR, it can contain a boot code */ 491 if (lba == 0) 492 bcopy(buf, table->ebr, sizeof(table->ebr)); 493 #endif 494 g_free(buf); 495 496 if (ent[0].dp_typ == 0) 497 break; 498 499 if (ent[0].dp_typ == 5 && ent[1].dp_typ == 0) { 500 lba = ent[0].dp_start; 501 continue; 502 } 503 504 index = (lba / basetable->gpt_sectors) + 1; 505 baseentry = (struct g_part_entry *)g_part_new_entry(basetable, 506 index, lba, lba + ent[0].dp_start + ent[0].dp_size - 1); 507 baseentry->gpe_offset = (off_t)(lba + ent[0].dp_start) * 508 pp->sectorsize; 509 entry = (struct g_part_ebr_entry *)baseentry; 510 entry->ent = ent[0]; 511 512 if (ent[1].dp_typ == 0) 513 break; 514 515 lba = ent[1].dp_start; 516 } 517 518 basetable->gpt_entries = msize / basetable->gpt_sectors; 519 basetable->gpt_first = 0; 520 basetable->gpt_last = msize - 1; 521 return (0); 522 } 523 524 static int 525 g_part_ebr_setunset(struct g_part_table *table, struct g_part_entry *baseentry, 526 const char *attrib, unsigned int set) 527 { 528 struct g_part_entry *iter; 529 struct g_part_ebr_entry *entry; 530 int changed; 531 532 if (strcasecmp(attrib, "active") != 0) 533 return (EINVAL); 534 535 /* Only one entry can have the active attribute. */ 536 LIST_FOREACH(iter, &table->gpt_entry, gpe_entry) { 537 if (iter->gpe_deleted) 538 continue; 539 changed = 0; 540 entry = (struct g_part_ebr_entry *)iter; 541 if (iter == baseentry) { 542 if (set && (entry->ent.dp_flag & 0x80) == 0) { 543 entry->ent.dp_flag |= 0x80; 544 changed = 1; 545 } else if (!set && (entry->ent.dp_flag & 0x80)) { 546 entry->ent.dp_flag &= ~0x80; 547 changed = 1; 548 } 549 } else { 550 if (set && (entry->ent.dp_flag & 0x80)) { 551 entry->ent.dp_flag &= ~0x80; 552 changed = 1; 553 } 554 } 555 if (changed && !iter->gpe_created) 556 iter->gpe_modified = 1; 557 } 558 return (0); 559 } 560 561 static const char * 562 g_part_ebr_type(struct g_part_table *basetable, struct g_part_entry *baseentry, 563 char *buf, size_t bufsz) 564 { 565 struct g_part_ebr_entry *entry; 566 int i; 567 568 entry = (struct g_part_ebr_entry *)baseentry; 569 for (i = 0; 570 i < sizeof(ebr_alias_match) / sizeof(ebr_alias_match[0]); i++) { 571 if (ebr_alias_match[i].typ == entry->ent.dp_typ) 572 return (g_part_alias_name(ebr_alias_match[i].alias)); 573 } 574 snprintf(buf, bufsz, "!%d", entry->ent.dp_typ); 575 return (buf); 576 } 577 578 static int 579 g_part_ebr_write(struct g_part_table *basetable, struct g_consumer *cp) 580 { 581 #ifndef GEOM_PART_EBR_COMPAT 582 struct g_part_ebr_table *table; 583 #endif 584 struct g_provider *pp; 585 struct g_part_entry *baseentry, *next; 586 struct g_part_ebr_entry *entry; 587 u_char *buf; 588 u_char *p; 589 int error; 590 591 pp = cp->provider; 592 buf = g_malloc(pp->sectorsize, M_WAITOK | M_ZERO); 593 #ifndef GEOM_PART_EBR_COMPAT 594 table = (struct g_part_ebr_table *)basetable; 595 bcopy(table->ebr, buf, DOSPARTOFF); 596 #endif 597 le16enc(buf + DOSMAGICOFFSET, DOSMAGIC); 598 599 baseentry = LIST_FIRST(&basetable->gpt_entry); 600 while (baseentry != NULL && baseentry->gpe_deleted) 601 baseentry = LIST_NEXT(baseentry, gpe_entry); 602 603 /* Wipe-out the first EBR when there are no slices. */ 604 if (baseentry == NULL) { 605 error = g_write_data(cp, 0, buf, pp->sectorsize); 606 goto out; 607 } 608 609 /* 610 * If the first partition is not in LBA 0, we need to 611 * put a "link" EBR in LBA 0. 612 */ 613 if (baseentry->gpe_start != 0) { 614 ebr_entry_link(basetable, (uint32_t)baseentry->gpe_start, 615 (uint32_t)baseentry->gpe_end, buf + DOSPARTOFF); 616 error = g_write_data(cp, 0, buf, pp->sectorsize); 617 if (error) 618 goto out; 619 } 620 621 do { 622 entry = (struct g_part_ebr_entry *)baseentry; 623 624 p = buf + DOSPARTOFF; 625 p[0] = entry->ent.dp_flag; 626 p[1] = entry->ent.dp_shd; 627 p[2] = entry->ent.dp_ssect; 628 p[3] = entry->ent.dp_scyl; 629 p[4] = entry->ent.dp_typ; 630 p[5] = entry->ent.dp_ehd; 631 p[6] = entry->ent.dp_esect; 632 p[7] = entry->ent.dp_ecyl; 633 le32enc(p + 8, entry->ent.dp_start); 634 le32enc(p + 12, entry->ent.dp_size); 635 636 next = LIST_NEXT(baseentry, gpe_entry); 637 while (next != NULL && next->gpe_deleted) 638 next = LIST_NEXT(next, gpe_entry); 639 640 p += DOSPARTSIZE; 641 if (next != NULL) 642 ebr_entry_link(basetable, (uint32_t)next->gpe_start, 643 (uint32_t)next->gpe_end, p); 644 else 645 bzero(p, DOSPARTSIZE); 646 647 error = g_write_data(cp, baseentry->gpe_start * pp->sectorsize, 648 buf, pp->sectorsize); 649 #ifndef GEOM_PART_EBR_COMPAT 650 if (baseentry->gpe_start == 0) 651 bzero(buf, DOSPARTOFF); 652 #endif 653 baseentry = next; 654 } while (!error && baseentry != NULL); 655 656 out: 657 g_free(buf); 658 return (error); 659 } 660