g_part_bsd.c revision 265912
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: stable/10/sys/geom/part/g_part_bsd.c 265912 2014-05-12 12:04:44Z ae $"); 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 54FEATURE(geom_part_bsd, "GEOM partitioning class for BSD disklabels"); 55 56struct g_part_bsd_table { 57 struct g_part_table base; 58 u_char *bbarea; 59 uint32_t offset; 60}; 61 62struct g_part_bsd_entry { 63 struct g_part_entry base; 64 struct partition part; 65}; 66 67static int g_part_bsd_add(struct g_part_table *, struct g_part_entry *, 68 struct g_part_parms *); 69static int g_part_bsd_bootcode(struct g_part_table *, struct g_part_parms *); 70static int g_part_bsd_create(struct g_part_table *, struct g_part_parms *); 71static int g_part_bsd_destroy(struct g_part_table *, struct g_part_parms *); 72static void g_part_bsd_dumpconf(struct g_part_table *, struct g_part_entry *, 73 struct sbuf *, const char *); 74static int g_part_bsd_dumpto(struct g_part_table *, struct g_part_entry *); 75static int g_part_bsd_modify(struct g_part_table *, struct g_part_entry *, 76 struct g_part_parms *); 77static const char *g_part_bsd_name(struct g_part_table *, struct g_part_entry *, 78 char *, size_t); 79static int g_part_bsd_probe(struct g_part_table *, struct g_consumer *); 80static int g_part_bsd_read(struct g_part_table *, struct g_consumer *); 81static const char *g_part_bsd_type(struct g_part_table *, struct g_part_entry *, 82 char *, size_t); 83static int g_part_bsd_write(struct g_part_table *, struct g_consumer *); 84static int g_part_bsd_resize(struct g_part_table *, struct g_part_entry *, 85 struct g_part_parms *); 86 87static 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 104static 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}; 113G_PART_SCHEME_DECLARE(g_part_bsd); 114 115static int 116bsd_parse_type(const char *type, uint8_t *fstype) 117{ 118 const char *alias; 119 char *endp; 120 long lt; 121 122 if (type[0] == '!') { 123 lt = strtol(type + 1, &endp, 0); 124 if (type[1] == '\0' || *endp != '\0' || lt <= 0 || lt >= 256) 125 return (EINVAL); 126 *fstype = (u_int)lt; 127 return (0); 128 } 129 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_NANDFS); 130 if (!strcasecmp(type, alias)) { 131 *fstype = FS_NANDFS; 132 return (0); 133 } 134 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP); 135 if (!strcasecmp(type, alias)) { 136 *fstype = FS_SWAP; 137 return (0); 138 } 139 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS); 140 if (!strcasecmp(type, alias)) { 141 *fstype = FS_BSDFFS; 142 return (0); 143 } 144 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM); 145 if (!strcasecmp(type, alias)) { 146 *fstype = FS_VINUM; 147 return (0); 148 } 149 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS); 150 if (!strcasecmp(type, alias)) { 151 *fstype = FS_ZFS; 152 return (0); 153 } 154 return (EINVAL); 155} 156 157static int 158g_part_bsd_add(struct g_part_table *basetable, struct g_part_entry *baseentry, 159 struct g_part_parms *gpp) 160{ 161 struct g_part_bsd_entry *entry; 162 struct g_part_bsd_table *table; 163 164 if (gpp->gpp_parms & G_PART_PARM_LABEL) 165 return (EINVAL); 166 167 entry = (struct g_part_bsd_entry *)baseentry; 168 table = (struct g_part_bsd_table *)basetable; 169 170 entry->part.p_size = gpp->gpp_size; 171 entry->part.p_offset = gpp->gpp_start + table->offset; 172 entry->part.p_fsize = 0; 173 entry->part.p_frag = 0; 174 entry->part.p_cpg = 0; 175 return (bsd_parse_type(gpp->gpp_type, &entry->part.p_fstype)); 176} 177 178static int 179g_part_bsd_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp) 180{ 181 struct g_part_bsd_table *table; 182 const u_char *codeptr; 183 184 if (gpp->gpp_codesize != BOOT1_SIZE && gpp->gpp_codesize != BBSIZE) 185 return (ENODEV); 186 187 table = (struct g_part_bsd_table *)basetable; 188 codeptr = gpp->gpp_codeptr; 189 bcopy(codeptr, table->bbarea, BOOT1_SIZE); 190 if (gpp->gpp_codesize == BBSIZE) 191 bcopy(codeptr + BOOT2_OFF, table->bbarea + BOOT2_OFF, 192 BOOT2_SIZE); 193 return (0); 194} 195 196static int 197g_part_bsd_create(struct g_part_table *basetable, struct g_part_parms *gpp) 198{ 199 struct g_provider *pp; 200 struct g_part_entry *baseentry; 201 struct g_part_bsd_entry *entry; 202 struct g_part_bsd_table *table; 203 u_char *ptr; 204 uint32_t msize, ncyls, secpercyl; 205 206 pp = gpp->gpp_provider; 207 208 if (pp->sectorsize < sizeof(struct disklabel)) 209 return (ENOSPC); 210 if (BBSIZE % pp->sectorsize) 211 return (ENOTBLK); 212 213 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX); 214 secpercyl = basetable->gpt_sectors * basetable->gpt_heads; 215 ncyls = msize / secpercyl; 216 217 table = (struct g_part_bsd_table *)basetable; 218 table->bbarea = g_malloc(BBSIZE, M_WAITOK | M_ZERO); 219 ptr = table->bbarea + pp->sectorsize; 220 221 le32enc(ptr + 0, DISKMAGIC); /* d_magic */ 222 le32enc(ptr + 40, pp->sectorsize); /* d_secsize */ 223 le32enc(ptr + 44, basetable->gpt_sectors); /* d_nsectors */ 224 le32enc(ptr + 48, basetable->gpt_heads); /* d_ntracks */ 225 le32enc(ptr + 52, ncyls); /* d_ncylinders */ 226 le32enc(ptr + 56, secpercyl); /* d_secpercyl */ 227 le32enc(ptr + 60, msize); /* d_secperunit */ 228 le16enc(ptr + 72, 3600); /* d_rpm */ 229 le32enc(ptr + 132, DISKMAGIC); /* d_magic2 */ 230 le16enc(ptr + 138, basetable->gpt_entries); /* d_npartitions */ 231 le32enc(ptr + 140, BBSIZE); /* d_bbsize */ 232 233 basetable->gpt_first = 0; 234 basetable->gpt_last = msize - 1; 235 basetable->gpt_isleaf = 1; 236 237 baseentry = g_part_new_entry(basetable, RAW_PART + 1, 238 basetable->gpt_first, basetable->gpt_last); 239 baseentry->gpe_internal = 1; 240 entry = (struct g_part_bsd_entry *)baseentry; 241 entry->part.p_size = basetable->gpt_last + 1; 242 entry->part.p_offset = table->offset; 243 244 return (0); 245} 246 247static int 248g_part_bsd_destroy(struct g_part_table *basetable, struct g_part_parms *gpp) 249{ 250 struct g_part_bsd_table *table; 251 252 table = (struct g_part_bsd_table *)basetable; 253 if (table->bbarea != NULL) 254 g_free(table->bbarea); 255 table->bbarea = NULL; 256 257 /* Wipe the second sector to clear the partitioning. */ 258 basetable->gpt_smhead |= 2; 259 return (0); 260} 261 262static void 263g_part_bsd_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry, 264 struct sbuf *sb, const char *indent) 265{ 266 struct g_part_bsd_entry *entry; 267 268 entry = (struct g_part_bsd_entry *)baseentry; 269 if (indent == NULL) { 270 /* conftxt: libdisk compatibility */ 271 sbuf_printf(sb, " xs BSD xt %u", entry->part.p_fstype); 272 } else if (entry != NULL) { 273 /* confxml: partition entry information */ 274 sbuf_printf(sb, "%s<rawtype>%u</rawtype>\n", indent, 275 entry->part.p_fstype); 276 } else { 277 /* confxml: scheme information */ 278 } 279} 280 281static int 282g_part_bsd_dumpto(struct g_part_table *table, struct g_part_entry *baseentry) 283{ 284 struct g_part_bsd_entry *entry; 285 286 /* Allow dumping to a swap partition or an unused partition. */ 287 entry = (struct g_part_bsd_entry *)baseentry; 288 return ((entry->part.p_fstype == FS_UNUSED || 289 entry->part.p_fstype == FS_SWAP) ? 1 : 0); 290} 291 292static int 293g_part_bsd_modify(struct g_part_table *basetable, 294 struct g_part_entry *baseentry, struct g_part_parms *gpp) 295{ 296 struct g_part_bsd_entry *entry; 297 298 if (gpp->gpp_parms & G_PART_PARM_LABEL) 299 return (EINVAL); 300 301 entry = (struct g_part_bsd_entry *)baseentry; 302 if (gpp->gpp_parms & G_PART_PARM_TYPE) 303 return (bsd_parse_type(gpp->gpp_type, &entry->part.p_fstype)); 304 return (0); 305} 306 307static void 308bsd_set_rawsize(struct g_part_table *basetable, struct g_provider *pp) 309{ 310 struct g_part_bsd_table *table; 311 struct g_part_bsd_entry *entry; 312 struct g_part_entry *baseentry; 313 uint32_t msize; 314 315 table = (struct g_part_bsd_table *)basetable; 316 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX); 317 le32enc(table->bbarea + pp->sectorsize + 60, msize); /* d_secperunit */ 318 basetable->gpt_last = msize - 1; 319 LIST_FOREACH(baseentry, &basetable->gpt_entry, gpe_entry) { 320 if (baseentry->gpe_index != RAW_PART + 1) 321 continue; 322 baseentry->gpe_end = basetable->gpt_last; 323 entry = (struct g_part_bsd_entry *)baseentry; 324 entry->part.p_size = msize; 325 return; 326 } 327} 328 329static int 330g_part_bsd_resize(struct g_part_table *basetable, 331 struct g_part_entry *baseentry, struct g_part_parms *gpp) 332{ 333 struct g_part_bsd_entry *entry; 334 struct g_provider *pp; 335 336 if (baseentry == NULL) { 337 pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider; 338 bsd_set_rawsize(basetable, pp); 339 return (0); 340 } 341 entry = (struct g_part_bsd_entry *)baseentry; 342 baseentry->gpe_end = baseentry->gpe_start + gpp->gpp_size - 1; 343 entry->part.p_size = gpp->gpp_size; 344 345 return (0); 346} 347 348static const char * 349g_part_bsd_name(struct g_part_table *table, struct g_part_entry *baseentry, 350 char *buf, size_t bufsz) 351{ 352 353 snprintf(buf, bufsz, "%c", 'a' + baseentry->gpe_index - 1); 354 return (buf); 355} 356 357static int 358g_part_bsd_probe(struct g_part_table *table, struct g_consumer *cp) 359{ 360 struct g_provider *pp; 361 u_char *buf; 362 uint32_t magic1, magic2; 363 int error; 364 365 pp = cp->provider; 366 367 /* Sanity-check the provider. */ 368 if (pp->sectorsize < sizeof(struct disklabel) || 369 pp->mediasize < BBSIZE) 370 return (ENOSPC); 371 if (BBSIZE % pp->sectorsize) 372 return (ENOTBLK); 373 374 /* Check that there's a disklabel. */ 375 buf = g_read_data(cp, pp->sectorsize, pp->sectorsize, &error); 376 if (buf == NULL) 377 return (error); 378 magic1 = le32dec(buf + 0); 379 magic2 = le32dec(buf + 132); 380 g_free(buf); 381 return ((magic1 == DISKMAGIC && magic2 == DISKMAGIC) 382 ? G_PART_PROBE_PRI_HIGH : ENXIO); 383} 384 385static int 386g_part_bsd_read(struct g_part_table *basetable, struct g_consumer *cp) 387{ 388 struct g_provider *pp; 389 struct g_part_bsd_table *table; 390 struct g_part_entry *baseentry; 391 struct g_part_bsd_entry *entry; 392 struct partition part; 393 u_char *buf, *p; 394 off_t chs, msize; 395 u_int sectors, heads; 396 int error, index; 397 398 pp = cp->provider; 399 table = (struct g_part_bsd_table *)basetable; 400 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX); 401 402 table->bbarea = g_read_data(cp, 0, BBSIZE, &error); 403 if (table->bbarea == NULL) 404 return (error); 405 406 buf = table->bbarea + pp->sectorsize; 407 408 if (le32dec(buf + 40) != pp->sectorsize) 409 goto invalid_label; 410 sectors = le32dec(buf + 44); 411 if (sectors < 1 || sectors > 255) 412 goto invalid_label; 413 if (sectors != basetable->gpt_sectors && !basetable->gpt_fixgeom) { 414 g_part_geometry_heads(msize, sectors, &chs, &heads); 415 if (chs != 0) { 416 basetable->gpt_sectors = sectors; 417 basetable->gpt_heads = heads; 418 } 419 } 420 heads = le32dec(buf + 48); 421 if (heads < 1 || heads > 255) 422 goto invalid_label; 423 if (heads != basetable->gpt_heads && !basetable->gpt_fixgeom) 424 basetable->gpt_heads = heads; 425 426 chs = le32dec(buf + 60); 427 if (chs < 1) 428 goto invalid_label; 429 /* Fix-up a sysinstall bug. */ 430 if (chs > msize) { 431 chs = msize; 432 le32enc(buf + 60, msize); 433 } 434 435 basetable->gpt_first = 0; 436 basetable->gpt_last = msize - 1; 437 basetable->gpt_isleaf = 1; 438 439 basetable->gpt_entries = le16dec(buf + 138); 440 if (basetable->gpt_entries < g_part_bsd_scheme.gps_minent || 441 basetable->gpt_entries > g_part_bsd_scheme.gps_maxent) 442 goto invalid_label; 443 444 table->offset = le32dec(buf + 148 + RAW_PART * 16 + 4); 445 for (index = basetable->gpt_entries - 1; index >= 0; index--) { 446 p = buf + 148 + index * 16; 447 part.p_size = le32dec(p + 0); 448 part.p_offset = le32dec(p + 4); 449 part.p_fsize = le32dec(p + 8); 450 part.p_fstype = p[12]; 451 part.p_frag = p[13]; 452 part.p_cpg = le16dec(p + 14); 453 if (part.p_size == 0) 454 continue; 455 if (part.p_offset < table->offset) 456 continue; 457 if (part.p_offset - table->offset > basetable->gpt_last) 458 goto invalid_label; 459 baseentry = g_part_new_entry(basetable, index + 1, 460 part.p_offset - table->offset, 461 part.p_offset - table->offset + part.p_size - 1); 462 entry = (struct g_part_bsd_entry *)baseentry; 463 entry->part = part; 464 if (index == RAW_PART) 465 baseentry->gpe_internal = 1; 466 } 467 468 return (0); 469 470 invalid_label: 471 printf("GEOM: %s: invalid disklabel.\n", pp->name); 472 g_free(table->bbarea); 473 table->bbarea = NULL; 474 return (EINVAL); 475} 476 477static const char * 478g_part_bsd_type(struct g_part_table *basetable, struct g_part_entry *baseentry, 479 char *buf, size_t bufsz) 480{ 481 struct g_part_bsd_entry *entry; 482 int type; 483 484 entry = (struct g_part_bsd_entry *)baseentry; 485 type = entry->part.p_fstype; 486 if (type == FS_NANDFS) 487 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_NANDFS)); 488 if (type == FS_SWAP) 489 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP)); 490 if (type == FS_BSDFFS) 491 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS)); 492 if (type == FS_VINUM) 493 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM)); 494 if (type == FS_ZFS) 495 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS)); 496 snprintf(buf, bufsz, "!%d", type); 497 return (buf); 498} 499 500static int 501g_part_bsd_write(struct g_part_table *basetable, struct g_consumer *cp) 502{ 503 struct g_provider *pp; 504 struct g_part_entry *baseentry; 505 struct g_part_bsd_entry *entry; 506 struct g_part_bsd_table *table; 507 uint16_t sum; 508 u_char *label, *p, *pe; 509 int error, index; 510 511 pp = cp->provider; 512 table = (struct g_part_bsd_table *)basetable; 513 baseentry = LIST_FIRST(&basetable->gpt_entry); 514 label = table->bbarea + pp->sectorsize; 515 for (index = 1; index <= basetable->gpt_entries; index++) { 516 p = label + 148 + (index - 1) * 16; 517 entry = (baseentry != NULL && index == baseentry->gpe_index) 518 ? (struct g_part_bsd_entry *)baseentry : NULL; 519 if (entry != NULL && !baseentry->gpe_deleted) { 520 le32enc(p + 0, entry->part.p_size); 521 le32enc(p + 4, entry->part.p_offset); 522 le32enc(p + 8, entry->part.p_fsize); 523 p[12] = entry->part.p_fstype; 524 p[13] = entry->part.p_frag; 525 le16enc(p + 14, entry->part.p_cpg); 526 } else 527 bzero(p, 16); 528 529 if (entry != NULL) 530 baseentry = LIST_NEXT(baseentry, gpe_entry); 531 } 532 533 /* Calculate checksum. */ 534 le16enc(label + 136, 0); 535 pe = label + 148 + basetable->gpt_entries * 16; 536 sum = 0; 537 for (p = label; p < pe; p += 2) 538 sum ^= le16dec(p); 539 le16enc(label + 136, sum); 540 541 error = g_write_data(cp, 0, table->bbarea, BBSIZE); 542 return (error); 543} 544