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 <geom/geom.h> 44 #include <geom/part/g_part.h> 45 46 #include "g_part_if.h" 47 48 struct g_part_bsd_table { 49 struct g_part_table base; 50 u_char *bbarea; 51 uint32_t offset; 52 }; 53 54 struct g_part_bsd_entry { 55 struct g_part_entry base; 56 struct partition part; 57 }; 58 59 static int g_part_bsd_add(struct g_part_table *, struct g_part_entry *, 60 struct g_part_parms *); 61 static int g_part_bsd_bootcode(struct g_part_table *, struct g_part_parms *); 62 static int g_part_bsd_create(struct g_part_table *, struct g_part_parms *); 63 static int g_part_bsd_destroy(struct g_part_table *, struct g_part_parms *); 64 static void g_part_bsd_dumpconf(struct g_part_table *, struct g_part_entry *, 65 struct sbuf *, const char *); 66 static int g_part_bsd_dumpto(struct g_part_table *, struct g_part_entry *); 67 static int g_part_bsd_modify(struct g_part_table *, struct g_part_entry *, 68 struct g_part_parms *); 69 static const char *g_part_bsd_name(struct g_part_table *, struct g_part_entry *, 70 char *, size_t); 71 static int g_part_bsd_probe(struct g_part_table *, struct g_consumer *); 72 static int g_part_bsd_read(struct g_part_table *, struct g_consumer *); 73 static const char *g_part_bsd_type(struct g_part_table *, struct g_part_entry *, 74 char *, size_t); 75 static int g_part_bsd_write(struct g_part_table *, struct g_consumer *); 76 77 static kobj_method_t g_part_bsd_methods[] = { 78 KOBJMETHOD(g_part_add, g_part_bsd_add), 79 KOBJMETHOD(g_part_bootcode, g_part_bsd_bootcode), 80 KOBJMETHOD(g_part_create, g_part_bsd_create), 81 KOBJMETHOD(g_part_destroy, g_part_bsd_destroy), 82 KOBJMETHOD(g_part_dumpconf, g_part_bsd_dumpconf), 83 KOBJMETHOD(g_part_dumpto, g_part_bsd_dumpto), 84 KOBJMETHOD(g_part_modify, g_part_bsd_modify), 85 KOBJMETHOD(g_part_name, g_part_bsd_name), 86 KOBJMETHOD(g_part_probe, g_part_bsd_probe), 87 KOBJMETHOD(g_part_read, g_part_bsd_read), 88 KOBJMETHOD(g_part_type, g_part_bsd_type), 89 KOBJMETHOD(g_part_write, g_part_bsd_write), 90 { 0, 0 } 91 }; 92 93 static struct g_part_scheme g_part_bsd_scheme = { 94 "BSD", 95 g_part_bsd_methods, 96 sizeof(struct g_part_bsd_table), 97 .gps_entrysz = sizeof(struct g_part_bsd_entry), 98 .gps_minent = 8, 99 .gps_maxent = 20, 100 .gps_bootcodesz = BBSIZE, 101 }; 102 G_PART_SCHEME_DECLARE(g_part_bsd); 103 104 static int 105 bsd_parse_type(const char *type, uint8_t *fstype) 106 { 107 const char *alias; 108 char *endp; 109 long lt; 110 111 if (type[0] == '!') { 112 lt = strtol(type + 1, &endp, 0); 113 if (type[1] == '\0' || *endp != '\0' || lt <= 0 || lt >= 256) 114 return (EINVAL); 115 *fstype = (u_int)lt; 116 return (0); 117 } 118 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP); 119 if (!strcasecmp(type, alias)) { 120 *fstype = FS_SWAP; 121 return (0); 122 } 123 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS); 124 if (!strcasecmp(type, alias)) { 125 *fstype = FS_BSDFFS; 126 return (0); 127 } 128 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM); 129 if (!strcasecmp(type, alias)) { 130 *fstype = FS_VINUM; 131 return (0); 132 } 133 alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS); 134 if (!strcasecmp(type, alias)) { 135 *fstype = FS_ZFS; 136 return (0); 137 } 138 return (EINVAL); 139 } 140 141 static int 142 g_part_bsd_add(struct g_part_table *basetable, struct g_part_entry *baseentry, 143 struct g_part_parms *gpp) 144 { 145 struct g_part_bsd_entry *entry; 146 struct g_part_bsd_table *table; 147 148 if (gpp->gpp_parms & G_PART_PARM_LABEL) 149 return (EINVAL); 150 151 entry = (struct g_part_bsd_entry *)baseentry; 152 table = (struct g_part_bsd_table *)basetable; 153 154 entry->part.p_size = gpp->gpp_size; 155 entry->part.p_offset = gpp->gpp_start + table->offset; 156 entry->part.p_fsize = 0; 157 entry->part.p_frag = 0; 158 entry->part.p_cpg = 0; 159 return (bsd_parse_type(gpp->gpp_type, &entry->part.p_fstype)); 160 } 161 162 static int 163 g_part_bsd_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp) 164 { 165 struct g_part_bsd_table *table; 166 const u_char *codeptr; 167 size_t hdsz, tlsz; 168 size_t codesz, tlofs; 169 170 hdsz = 512; 171 tlofs = hdsz + 148 + basetable->gpt_entries * 16; 172 tlsz = BBSIZE - tlofs; 173 table = (struct g_part_bsd_table *)basetable; 174 bzero(table->bbarea, hdsz); 175 bzero(table->bbarea + tlofs, tlsz); 176 codeptr = gpp->gpp_codeptr; 177 codesz = MIN(hdsz, gpp->gpp_codesize); 178 if (codesz > 0) 179 bcopy(codeptr, table->bbarea, codesz); 180 codesz = MIN(tlsz, gpp->gpp_codesize - tlofs); 181 if (codesz > 0) 182 bcopy(codeptr + tlofs, table->bbarea + tlofs, codesz); 183 return (0); 184 } 185 186 static int 187 g_part_bsd_create(struct g_part_table *basetable, struct g_part_parms *gpp) 188 { 189 struct g_consumer *cp; 190 struct g_provider *pp; 191 struct g_part_entry *baseentry; 192 struct g_part_bsd_entry *entry; 193 struct g_part_bsd_table *table; 194 u_char *ptr; 195 uint64_t msize; 196 uint32_t ncyls, secpercyl; 197 198 pp = gpp->gpp_provider; 199 cp = LIST_FIRST(&pp->consumers); 200 201 if (pp->sectorsize < sizeof(struct disklabel)) 202 return (ENOSPC); 203 if (BBSIZE % pp->sectorsize) 204 return (ENOTBLK); 205 206 msize = pp->mediasize / pp->sectorsize; 207 secpercyl = basetable->gpt_sectors * basetable->gpt_heads; 208 ncyls = msize / secpercyl; 209 210 table = (struct g_part_bsd_table *)basetable; 211 table->bbarea = g_malloc(BBSIZE, M_WAITOK | M_ZERO); 212 ptr = table->bbarea + pp->sectorsize; 213 214 le32enc(ptr + 0, DISKMAGIC); /* d_magic */ 215 le32enc(ptr + 40, pp->sectorsize); /* d_secsize */ 216 le32enc(ptr + 44, basetable->gpt_sectors); /* d_nsectors */ 217 le32enc(ptr + 48, basetable->gpt_heads); /* d_ntracks */ 218 le32enc(ptr + 52, ncyls); /* d_ncylinders */ 219 le32enc(ptr + 56, secpercyl); /* d_secpercyl */ 220 le32enc(ptr + 60, msize); /* d_secperunit */ 221 le16enc(ptr + 72, 3600); /* d_rpm */ 222 le32enc(ptr + 132, DISKMAGIC); /* d_magic2 */ 223 le16enc(ptr + 138, basetable->gpt_entries); /* d_npartitions */ 224 le32enc(ptr + 140, BBSIZE); /* d_bbsize */ 225 226 basetable->gpt_first = 0; 227 basetable->gpt_last = msize - 1; 228 basetable->gpt_isleaf = 1; 229 230 baseentry = g_part_new_entry(basetable, RAW_PART + 1, 231 basetable->gpt_first, basetable->gpt_last); 232 baseentry->gpe_internal = 1; 233 entry = (struct g_part_bsd_entry *)baseentry; 234 entry->part.p_size = basetable->gpt_last + 1; 235 entry->part.p_offset = table->offset; 236 237 return (0); 238 } 239 240 static int 241 g_part_bsd_destroy(struct g_part_table *basetable, struct g_part_parms *gpp) 242 { 243 244 /* Wipe the second sector to clear the partitioning. */ 245 basetable->gpt_smhead |= 2; 246 return (0); 247 } 248 249 static void 250 g_part_bsd_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry, 251 struct sbuf *sb, const char *indent) 252 { 253 struct g_part_bsd_entry *entry; 254 255 entry = (struct g_part_bsd_entry *)baseentry; 256 if (indent == NULL) { 257 /* conftxt: libdisk compatibility */ 258 sbuf_printf(sb, " xs BSD xt %u", entry->part.p_fstype); 259 } else if (entry != NULL) { 260 /* confxml: partition entry information */ 261 sbuf_printf(sb, "%s<rawtype>%u</rawtype>\n", indent, 262 entry->part.p_fstype); 263 } else { 264 /* confxml: scheme information */ 265 } 266 } 267 268 static int 269 g_part_bsd_dumpto(struct g_part_table *table, struct g_part_entry *baseentry) 270 { 271 struct g_part_bsd_entry *entry; 272 273 /* Allow dumping to a swap partition or an unused partition. */ 274 entry = (struct g_part_bsd_entry *)baseentry; 275 return ((entry->part.p_fstype == FS_UNUSED || 276 entry->part.p_fstype == FS_SWAP) ? 1 : 0); 277 } 278 279 static int 280 g_part_bsd_modify(struct g_part_table *basetable, 281 struct g_part_entry *baseentry, struct g_part_parms *gpp) 282 { 283 struct g_part_bsd_entry *entry; 284 285 if (gpp->gpp_parms & G_PART_PARM_LABEL) 286 return (EINVAL); 287 288 entry = (struct g_part_bsd_entry *)baseentry; 289 if (gpp->gpp_parms & G_PART_PARM_TYPE) 290 return (bsd_parse_type(gpp->gpp_type, &entry->part.p_fstype)); 291 return (0); 292 } 293 294 static const char * 295 g_part_bsd_name(struct g_part_table *table, struct g_part_entry *baseentry, 296 char *buf, size_t bufsz) 297 { 298 299 snprintf(buf, bufsz, "%c", 'a' + baseentry->gpe_index - 1); 300 return (buf); 301 } 302 303 static int 304 g_part_bsd_probe(struct g_part_table *table, struct g_consumer *cp) 305 { 306 struct g_provider *pp; 307 u_char *buf; 308 uint32_t magic1, magic2; 309 int error; 310 311 pp = cp->provider; 312 313 /* Sanity-check the provider. */ 314 if (pp->sectorsize < sizeof(struct disklabel) || 315 pp->mediasize < BBSIZE) 316 return (ENOSPC); 317 if (BBSIZE % pp->sectorsize) 318 return (ENOTBLK); 319 320 /* Check that there's a disklabel. */ 321 buf = g_read_data(cp, pp->sectorsize, pp->sectorsize, &error); 322 if (buf == NULL) 323 return (error); 324 magic1 = le32dec(buf + 0); 325 magic2 = le32dec(buf + 132); 326 g_free(buf); 327 return ((magic1 == DISKMAGIC && magic2 == DISKMAGIC) 328 ? G_PART_PROBE_PRI_HIGH : ENXIO); 329 } 330 331 static int 332 g_part_bsd_read(struct g_part_table *basetable, struct g_consumer *cp) 333 { 334 struct g_provider *pp; 335 struct g_part_bsd_table *table; 336 struct g_part_entry *baseentry; 337 struct g_part_bsd_entry *entry; 338 struct partition part; 339 u_char *buf, *p; 340 off_t chs, msize; 341 u_int sectors, heads; 342 int error, index; 343 344 pp = cp->provider; 345 table = (struct g_part_bsd_table *)basetable; 346 msize = pp->mediasize / pp->sectorsize; 347 348 table->bbarea = g_read_data(cp, 0, BBSIZE, &error); 349 if (table->bbarea == NULL) 350 return (error); 351 352 buf = table->bbarea + pp->sectorsize; 353 354 if (le32dec(buf + 40) != pp->sectorsize) 355 goto invalid_label; 356 sectors = le32dec(buf + 44); 357 if (sectors < 1 || sectors > 255) 358 goto invalid_label; 359 if (sectors != basetable->gpt_sectors && !basetable->gpt_fixgeom) { 360 g_part_geometry_heads(msize, sectors, &chs, &heads); 361 if (chs != 0) { 362 basetable->gpt_sectors = sectors; 363 basetable->gpt_heads = heads; 364 } 365 } 366 heads = le32dec(buf + 48); 367 if (heads < 1 || heads > 255) 368 goto invalid_label; 369 if (heads != basetable->gpt_heads && !basetable->gpt_fixgeom) 370 basetable->gpt_heads = heads; 371 if (sectors != basetable->gpt_sectors || heads != basetable->gpt_heads) 372 printf("GEOM: %s: geometry does not match label" 373 " (%uh,%us != %uh,%us).\n", pp->name, heads, sectors, 374 basetable->gpt_heads, basetable->gpt_sectors); 375 376 chs = le32dec(buf + 60); 377 if (chs < 1) 378 goto invalid_label; 379 /* Fix-up a sysinstall bug. */ 380 if (chs > msize) { 381 chs = msize; 382 le32enc(buf + 60, msize); 383 } 384 if (chs != msize) 385 printf("GEOM: %s: media size does not match label.\n", 386 pp->name); 387 388 basetable->gpt_first = 0; 389 basetable->gpt_last = msize - 1; 390 basetable->gpt_isleaf = 1; 391 392 basetable->gpt_entries = le16dec(buf + 138); 393 if (basetable->gpt_entries < g_part_bsd_scheme.gps_minent || 394 basetable->gpt_entries > g_part_bsd_scheme.gps_maxent) 395 goto invalid_label; 396 397 table->offset = le32dec(buf + 148 + RAW_PART * 16 + 4); 398 for (index = basetable->gpt_entries - 1; index >= 0; index--) { 399 p = buf + 148 + index * 16; 400 part.p_size = le32dec(p + 0); 401 part.p_offset = le32dec(p + 4); 402 part.p_fsize = le32dec(p + 8); 403 part.p_fstype = p[12]; 404 part.p_frag = p[13]; 405 part.p_cpg = le16dec(p + 14); 406 if (part.p_size == 0) 407 continue; 408 if (part.p_offset < table->offset) 409 continue; 410 baseentry = g_part_new_entry(basetable, index + 1, 411 part.p_offset - table->offset, 412 part.p_offset - table->offset + part.p_size - 1); 413 entry = (struct g_part_bsd_entry *)baseentry; 414 entry->part = part; 415 if (index == RAW_PART) 416 baseentry->gpe_internal = 1; 417 } 418 419 return (0); 420 421 invalid_label: 422 printf("GEOM: %s: invalid disklabel.\n", pp->name); 423 g_free(table->bbarea); 424 return (EINVAL); 425 } 426 427 static const char * 428 g_part_bsd_type(struct g_part_table *basetable, struct g_part_entry *baseentry, 429 char *buf, size_t bufsz) 430 { 431 struct g_part_bsd_entry *entry; 432 int type; 433 434 entry = (struct g_part_bsd_entry *)baseentry; 435 type = entry->part.p_fstype; 436 if (type == FS_SWAP) 437 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP)); 438 if (type == FS_BSDFFS) 439 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS)); 440 if (type == FS_VINUM) 441 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM)); 442 if (type == FS_ZFS) 443 return (g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS)); 444 snprintf(buf, bufsz, "!%d", type); 445 return (buf); 446 } 447 448 static int 449 g_part_bsd_write(struct g_part_table *basetable, struct g_consumer *cp) 450 { 451 struct g_provider *pp; 452 struct g_part_entry *baseentry; 453 struct g_part_bsd_entry *entry; 454 struct g_part_bsd_table *table; 455 uint16_t sum; 456 u_char *label, *p, *pe; 457 int error, index; 458 459 pp = cp->provider; 460 table = (struct g_part_bsd_table *)basetable; 461 baseentry = LIST_FIRST(&basetable->gpt_entry); 462 label = table->bbarea + pp->sectorsize; 463 for (index = 1; index <= basetable->gpt_entries; index++) { 464 p = label + 148 + (index - 1) * 16; 465 entry = (baseentry != NULL && index == baseentry->gpe_index) 466 ? (struct g_part_bsd_entry *)baseentry : NULL; 467 if (entry != NULL && !baseentry->gpe_deleted) { 468 le32enc(p + 0, entry->part.p_size); 469 le32enc(p + 4, entry->part.p_offset); 470 le32enc(p + 8, entry->part.p_fsize); 471 p[12] = entry->part.p_fstype; 472 p[13] = entry->part.p_frag; 473 le16enc(p + 14, entry->part.p_cpg); 474 } else 475 bzero(p, 16); 476 477 if (entry != NULL) 478 baseentry = LIST_NEXT(baseentry, gpe_entry); 479 } 480 481 /* Calculate checksum. */ 482 le16enc(label + 136, 0); 483 pe = label + 148 + basetable->gpt_entries * 16; 484 sum = 0; 485 for (p = label; p < pe; p += 2) 486 sum ^= le16dec(p); 487 le16enc(label + 136, sum); 488 489 error = g_write_data(cp, 0, table->bbarea, BBSIZE); 490 return (error); 491 } 492