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