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 int 116 bsd_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_SWAP); 130 if (!strcasecmp(type, alias)) { 131 *fstype = FS_SWAP; 132 return (0); 133 } 134 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS); 135 if (!strcasecmp(type, alias)) { 136 *fstype = FS_BSDFFS; 137 return (0); 138 } 139 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM); 140 if (!strcasecmp(type, alias)) { 141 *fstype = FS_VINUM; 142 return (0); 143 } 144 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS); 145 if (!strcasecmp(type, alias)) { 146 *fstype = FS_ZFS; 147 return (0); 148 } 149 return (EINVAL); 150 } 151 152 static int 153 g_part_bsd_add(struct g_part_table *basetable, struct g_part_entry *baseentry, 154 struct g_part_parms *gpp) 155 { 156 struct g_part_bsd_entry *entry; 157 struct g_part_bsd_table *table; 158 159 if (gpp->gpp_parms & G_PART_PARM_LABEL) 160 return (EINVAL); 161 162 entry = (struct g_part_bsd_entry *)baseentry; 163 table = (struct g_part_bsd_table *)basetable; 164 165 entry->part.p_size = gpp->gpp_size; 166 entry->part.p_offset = gpp->gpp_start + table->offset; 167 entry->part.p_fsize = 0; 168 entry->part.p_frag = 0; 169 entry->part.p_cpg = 0; 170 return (bsd_parse_type(gpp->gpp_type, &entry->part.p_fstype)); 171 } 172 173 static int 174 g_part_bsd_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp) 175 { 176 struct g_part_bsd_table *table; 177 const u_char *codeptr; 178 179 if (gpp->gpp_codesize != BOOT1_SIZE && gpp->gpp_codesize != BBSIZE) 180 return (ENODEV); 181 182 table = (struct g_part_bsd_table *)basetable; 183 codeptr = gpp->gpp_codeptr; 184 bcopy(codeptr, table->bbarea, BOOT1_SIZE); 185 if (gpp->gpp_codesize == BBSIZE) 186 bcopy(codeptr + BOOT2_OFF, table->bbarea + BOOT2_OFF, 187 BOOT2_SIZE); 188 return (0); 189 } 190 191 static int 192 g_part_bsd_create(struct g_part_table *basetable, struct g_part_parms *gpp) 193 { 194 struct g_provider *pp; 195 struct g_part_entry *baseentry; 196 struct g_part_bsd_entry *entry; 197 struct g_part_bsd_table *table; 198 u_char *ptr; 199 uint32_t msize, ncyls, secpercyl; 200 201 pp = gpp->gpp_provider; 202 203 if (pp->sectorsize < sizeof(struct disklabel)) 204 return (ENOSPC); 205 if (BBSIZE % pp->sectorsize) 206 return (ENOTBLK); 207 208 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX); 209 secpercyl = basetable->gpt_sectors * basetable->gpt_heads; 210 ncyls = msize / secpercyl; 211 212 table = (struct g_part_bsd_table *)basetable; 213 table->bbarea = g_malloc(BBSIZE, M_WAITOK | M_ZERO); 214 ptr = table->bbarea + pp->sectorsize; 215 216 le32enc(ptr + 0, DISKMAGIC); /* d_magic */ 217 le32enc(ptr + 40, pp->sectorsize); /* d_secsize */ 218 le32enc(ptr + 44, basetable->gpt_sectors); /* d_nsectors */ 219 le32enc(ptr + 48, basetable->gpt_heads); /* d_ntracks */ 220 le32enc(ptr + 52, ncyls); /* d_ncylinders */ 221 le32enc(ptr + 56, secpercyl); /* d_secpercyl */ 222 le32enc(ptr + 60, msize); /* d_secperunit */ 223 le16enc(ptr + 72, 3600); /* d_rpm */ 224 le32enc(ptr + 132, DISKMAGIC); /* d_magic2 */ 225 le16enc(ptr + 138, basetable->gpt_entries); /* d_npartitions */ 226 le32enc(ptr + 140, BBSIZE); /* d_bbsize */ 227 228 basetable->gpt_first = 0; 229 basetable->gpt_last = msize - 1; 230 basetable->gpt_isleaf = 1; 231 232 baseentry = g_part_new_entry(basetable, RAW_PART + 1, 233 basetable->gpt_first, basetable->gpt_last); 234 baseentry->gpe_internal = 1; 235 entry = (struct g_part_bsd_entry *)baseentry; 236 entry->part.p_size = basetable->gpt_last + 1; 237 entry->part.p_offset = table->offset; 238 239 return (0); 240 } 241 242 static int 243 g_part_bsd_destroy(struct g_part_table *basetable, struct g_part_parms *gpp) 244 { 245 struct g_part_bsd_table *table; 246 247 table = (struct g_part_bsd_table *)basetable; 248 if (table->bbarea != NULL) 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 int 303 g_part_bsd_resize(struct g_part_table *basetable, 304 struct g_part_entry *baseentry, struct g_part_parms *gpp) 305 { 306 struct g_part_bsd_entry *entry; 307 308 entry = (struct g_part_bsd_entry *)baseentry; 309 baseentry->gpe_end = baseentry->gpe_start + gpp->gpp_size - 1; 310 entry->part.p_size = gpp->gpp_size; 311 312 return (0); 313 } 314 315 static const char * 316 g_part_bsd_name(struct g_part_table *table, struct g_part_entry *baseentry, 317 char *buf, size_t bufsz) 318 { 319 320 snprintf(buf, bufsz, "%c", 'a' + baseentry->gpe_index - 1); 321 return (buf); 322 } 323 324 static int 325 g_part_bsd_probe(struct g_part_table *table, struct g_consumer *cp) 326 { 327 struct g_provider *pp; 328 u_char *buf; 329 uint32_t magic1, magic2; 330 int error; 331 332 pp = cp->provider; 333 334 /* Sanity-check the provider. */ 335 if (pp->sectorsize < sizeof(struct disklabel) || 336 pp->mediasize < BBSIZE) 337 return (ENOSPC); 338 if (BBSIZE % pp->sectorsize) 339 return (ENOTBLK); 340 341 /* Check that there's a disklabel. */ 342 buf = g_read_data(cp, pp->sectorsize, pp->sectorsize, &error); 343 if (buf == NULL) 344 return (error); 345 magic1 = le32dec(buf + 0); 346 magic2 = le32dec(buf + 132); 347 g_free(buf); 348 return ((magic1 == DISKMAGIC && magic2 == DISKMAGIC) 349 ? G_PART_PROBE_PRI_HIGH : ENXIO); 350 } 351 352 static int 353 g_part_bsd_read(struct g_part_table *basetable, struct g_consumer *cp) 354 { 355 struct g_provider *pp; 356 struct g_part_bsd_table *table; 357 struct g_part_entry *baseentry; 358 struct g_part_bsd_entry *entry; 359 struct partition part; 360 u_char *buf, *p; 361 off_t chs, msize; 362 u_int sectors, heads; 363 int error, index; 364 365 pp = cp->provider; 366 table = (struct g_part_bsd_table *)basetable; 367 msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX); 368 369 table->bbarea = g_read_data(cp, 0, BBSIZE, &error); 370 if (table->bbarea == NULL) 371 return (error); 372 373 buf = table->bbarea + pp->sectorsize; 374 375 if (le32dec(buf + 40) != pp->sectorsize) 376 goto invalid_label; 377 sectors = le32dec(buf + 44); 378 if (sectors < 1 || sectors > 255) 379 goto invalid_label; 380 if (sectors != basetable->gpt_sectors && !basetable->gpt_fixgeom) { 381 g_part_geometry_heads(msize, sectors, &chs, &heads); 382 if (chs != 0) { 383 basetable->gpt_sectors = sectors; 384 basetable->gpt_heads = heads; 385 } 386 } 387 heads = le32dec(buf + 48); 388 if (heads < 1 || heads > 255) 389 goto invalid_label; 390 if (heads != basetable->gpt_heads && !basetable->gpt_fixgeom) 391 basetable->gpt_heads = heads; 392 393 chs = le32dec(buf + 60); 394 if (chs < 1) 395 goto invalid_label; 396 /* Fix-up a sysinstall bug. */ 397 if (chs > msize) { 398 chs = msize; 399 le32enc(buf + 60, msize); 400 } 401 402 basetable->gpt_first = 0; 403 basetable->gpt_last = msize - 1; 404 basetable->gpt_isleaf = 1; 405 406 basetable->gpt_entries = le16dec(buf + 138); 407 if (basetable->gpt_entries < g_part_bsd_scheme.gps_minent || 408 basetable->gpt_entries > g_part_bsd_scheme.gps_maxent) 409 goto invalid_label; 410 411 table->offset = le32dec(buf + 148 + RAW_PART * 16 + 4); 412 for (index = basetable->gpt_entries - 1; index >= 0; index--) { 413 p = buf + 148 + index * 16; 414 part.p_size = le32dec(p + 0); 415 part.p_offset = le32dec(p + 4); 416 part.p_fsize = le32dec(p + 8); 417 part.p_fstype = p[12]; 418 part.p_frag = p[13]; 419 part.p_cpg = le16dec(p + 14); 420 if (part.p_size == 0) 421 continue; 422 if (part.p_offset < table->offset) 423 continue; 424 if (part.p_offset - table->offset > basetable->gpt_last) 425 goto invalid_label; 426 baseentry = g_part_new_entry(basetable, index + 1, 427 part.p_offset - table->offset, 428 part.p_offset - table->offset + part.p_size - 1); 429 entry = (struct g_part_bsd_entry *)baseentry; 430 entry->part = part; 431 if (index == RAW_PART) 432 baseentry->gpe_internal = 1; 433 } 434 435 return (0); 436 437 invalid_label: 438 printf("GEOM: %s: invalid disklabel.\n", pp->name); 439 g_free(table->bbarea); 440 table->bbarea = NULL; 441 return (EINVAL); 442 } 443 444 static const char * 445 g_part_bsd_type(struct g_part_table *basetable, struct g_part_entry *baseentry, 446 char *buf, size_t bufsz) 447 { 448 struct g_part_bsd_entry *entry; 449 int type; 450 451 entry = (struct g_part_bsd_entry *)baseentry; 452 type = entry->part.p_fstype; 453 if (type == FS_SWAP) 454 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP)); 455 if (type == FS_BSDFFS) 456 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS)); 457 if (type == FS_VINUM) 458 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM)); 459 if (type == FS_ZFS) 460 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS)); 461 snprintf(buf, bufsz, "!%d", type); 462 return (buf); 463 } 464 465 static int 466 g_part_bsd_write(struct g_part_table *basetable, struct g_consumer *cp) 467 { 468 struct g_provider *pp; 469 struct g_part_entry *baseentry; 470 struct g_part_bsd_entry *entry; 471 struct g_part_bsd_table *table; 472 uint16_t sum; 473 u_char *label, *p, *pe; 474 int error, index; 475 476 pp = cp->provider; 477 table = (struct g_part_bsd_table *)basetable; 478 baseentry = LIST_FIRST(&basetable->gpt_entry); 479 label = table->bbarea + pp->sectorsize; 480 for (index = 1; index <= basetable->gpt_entries; index++) { 481 p = label + 148 + (index - 1) * 16; 482 entry = (baseentry != NULL && index == baseentry->gpe_index) 483 ? (struct g_part_bsd_entry *)baseentry : NULL; 484 if (entry != NULL && !baseentry->gpe_deleted) { 485 le32enc(p + 0, entry->part.p_size); 486 le32enc(p + 4, entry->part.p_offset); 487 le32enc(p + 8, entry->part.p_fsize); 488 p[12] = entry->part.p_fstype; 489 p[13] = entry->part.p_frag; 490 le16enc(p + 14, entry->part.p_cpg); 491 } else 492 bzero(p, 16); 493 494 if (entry != NULL) 495 baseentry = LIST_NEXT(baseentry, gpe_entry); 496 } 497 498 /* Calculate checksum. */ 499 le16enc(label + 136, 0); 500 pe = label + 148 + basetable->gpt_entries * 16; 501 sum = 0; 502 for (p = label; p < pe; p += 2) 503 sum ^= le16dec(p); 504 le16enc(label + 136, sum); 505 506 error = g_write_data(cp, 0, table->bbarea, BBSIZE); 507 return (error); 508 } 509