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sys/geom/part/g_part_gpt.c
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1 /*- 2 * Copyright (c) 2002, 2005, 2006, 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: releng/8.3/sys/geom/part/g_part_gpt.c 223816 2011-07-06 05:40:22Z ae $"); 29 30 #include <sys/param.h> 31 #include <sys/bio.h> 32 #include <sys/diskmbr.h> 33 #include <sys/endian.h> 34 #include <sys/gpt.h> 35 #include <sys/kernel.h> 36 #include <sys/kobj.h> 37 #include <sys/limits.h> 38 #include <sys/lock.h> 39 #include <sys/malloc.h> 40 #include <sys/mutex.h> 41 #include <sys/queue.h> 42 #include <sys/sbuf.h> 43 #include <sys/systm.h> 44 #include <sys/uuid.h> 45 #include <geom/geom.h> 46 #include <geom/part/g_part.h> 47 48 #include "g_part_if.h" 49 50 CTASSERT(offsetof(struct gpt_hdr, padding) == 92); 51 CTASSERT(sizeof(struct gpt_ent) == 128); 52 53 #define EQUUID(a,b) (memcmp(a, b, sizeof(struct uuid)) == 0) 54 55 #define MBRSIZE 512 56 57 enum gpt_elt { 58 GPT_ELT_PRIHDR, 59 GPT_ELT_PRITBL, 60 GPT_ELT_SECHDR, 61 GPT_ELT_SECTBL, 62 GPT_ELT_COUNT 63 }; 64 65 enum gpt_state { 66 GPT_STATE_UNKNOWN, /* Not determined. */ 67 GPT_STATE_MISSING, /* No signature found. */ 68 GPT_STATE_CORRUPT, /* Checksum mismatch. */ 69 GPT_STATE_INVALID, /* Nonconformant/invalid. */ 70 GPT_STATE_OK /* Perfectly fine. */ 71 }; 72 73 struct g_part_gpt_table { 74 struct g_part_table base; 75 u_char mbr[MBRSIZE]; 76 struct gpt_hdr *hdr; 77 quad_t lba[GPT_ELT_COUNT]; 78 enum gpt_state state[GPT_ELT_COUNT]; 79 }; 80 81 struct g_part_gpt_entry { 82 struct g_part_entry base; 83 struct gpt_ent ent; 84 }; 85 86 static void g_gpt_printf_utf16(struct sbuf *, uint16_t *, size_t); 87 static void g_gpt_utf8_to_utf16(const uint8_t *, uint16_t *, size_t); 88 static void g_gpt_set_defaults(struct g_part_table *, struct g_provider *); 89 90 static int g_part_gpt_add(struct g_part_table *, struct g_part_entry *, 91 struct g_part_parms *); 92 static int g_part_gpt_bootcode(struct g_part_table *, struct g_part_parms *); 93 static int g_part_gpt_create(struct g_part_table *, struct g_part_parms *); 94 static int g_part_gpt_destroy(struct g_part_table *, struct g_part_parms *); 95 static void g_part_gpt_dumpconf(struct g_part_table *, struct g_part_entry *, 96 struct sbuf *, const char *); 97 static int g_part_gpt_dumpto(struct g_part_table *, struct g_part_entry *); 98 static int g_part_gpt_modify(struct g_part_table *, struct g_part_entry *, 99 struct g_part_parms *); 100 static const char *g_part_gpt_name(struct g_part_table *, struct g_part_entry *, 101 char *, size_t); 102 static int g_part_gpt_probe(struct g_part_table *, struct g_consumer *); 103 static int g_part_gpt_read(struct g_part_table *, struct g_consumer *); 104 static int g_part_gpt_setunset(struct g_part_table *table, 105 struct g_part_entry *baseentry, const char *attrib, unsigned int set); 106 static const char *g_part_gpt_type(struct g_part_table *, struct g_part_entry *, 107 char *, size_t); 108 static int g_part_gpt_write(struct g_part_table *, struct g_consumer *); 109 static int g_part_gpt_resize(struct g_part_table *, struct g_part_entry *, 110 struct g_part_parms *); 111 static int g_part_gpt_recover(struct g_part_table *); 112 113 static kobj_method_t g_part_gpt_methods[] = { 114 KOBJMETHOD(g_part_add, g_part_gpt_add), 115 KOBJMETHOD(g_part_bootcode, g_part_gpt_bootcode), 116 KOBJMETHOD(g_part_create, g_part_gpt_create), 117 KOBJMETHOD(g_part_destroy, g_part_gpt_destroy), 118 KOBJMETHOD(g_part_dumpconf, g_part_gpt_dumpconf), 119 KOBJMETHOD(g_part_dumpto, g_part_gpt_dumpto), 120 KOBJMETHOD(g_part_modify, g_part_gpt_modify), 121 KOBJMETHOD(g_part_resize, g_part_gpt_resize), 122 KOBJMETHOD(g_part_name, g_part_gpt_name), 123 KOBJMETHOD(g_part_probe, g_part_gpt_probe), 124 KOBJMETHOD(g_part_read, g_part_gpt_read), 125 KOBJMETHOD(g_part_recover, g_part_gpt_recover), 126 KOBJMETHOD(g_part_setunset, g_part_gpt_setunset), 127 KOBJMETHOD(g_part_type, g_part_gpt_type), 128 KOBJMETHOD(g_part_write, g_part_gpt_write), 129 { 0, 0 } 130 }; 131 132 static struct g_part_scheme g_part_gpt_scheme = { 133 "GPT", 134 g_part_gpt_methods, 135 sizeof(struct g_part_gpt_table), 136 .gps_entrysz = sizeof(struct g_part_gpt_entry), 137 .gps_minent = 128, 138 .gps_maxent = 4096, 139 .gps_bootcodesz = MBRSIZE, 140 }; 141 G_PART_SCHEME_DECLARE(g_part_gpt); 142 143 static struct uuid gpt_uuid_apple_boot = GPT_ENT_TYPE_APPLE_BOOT; 144 static struct uuid gpt_uuid_apple_hfs = GPT_ENT_TYPE_APPLE_HFS; 145 static struct uuid gpt_uuid_apple_label = GPT_ENT_TYPE_APPLE_LABEL; 146 static struct uuid gpt_uuid_apple_raid = GPT_ENT_TYPE_APPLE_RAID; 147 static struct uuid gpt_uuid_apple_raid_offline = GPT_ENT_TYPE_APPLE_RAID_OFFLINE; 148 static struct uuid gpt_uuid_apple_tv_recovery = GPT_ENT_TYPE_APPLE_TV_RECOVERY; 149 static struct uuid gpt_uuid_apple_ufs = GPT_ENT_TYPE_APPLE_UFS; 150 static struct uuid gpt_uuid_bios_boot = GPT_ENT_TYPE_BIOS_BOOT; 151 static struct uuid gpt_uuid_efi = GPT_ENT_TYPE_EFI; 152 static struct uuid gpt_uuid_freebsd = GPT_ENT_TYPE_FREEBSD; 153 static struct uuid gpt_uuid_freebsd_boot = GPT_ENT_TYPE_FREEBSD_BOOT; 154 static struct uuid gpt_uuid_freebsd_swap = GPT_ENT_TYPE_FREEBSD_SWAP; 155 static struct uuid gpt_uuid_freebsd_ufs = GPT_ENT_TYPE_FREEBSD_UFS; 156 static struct uuid gpt_uuid_freebsd_vinum = GPT_ENT_TYPE_FREEBSD_VINUM; 157 static struct uuid gpt_uuid_freebsd_zfs = GPT_ENT_TYPE_FREEBSD_ZFS; 158 static struct uuid gpt_uuid_linux_data = GPT_ENT_TYPE_LINUX_DATA; 159 static struct uuid gpt_uuid_linux_lvm = GPT_ENT_TYPE_LINUX_LVM; 160 static struct uuid gpt_uuid_linux_raid = GPT_ENT_TYPE_LINUX_RAID; 161 static struct uuid gpt_uuid_linux_swap = GPT_ENT_TYPE_LINUX_SWAP; 162 static struct uuid gpt_uuid_ms_basic_data = GPT_ENT_TYPE_MS_BASIC_DATA; 163 static struct uuid gpt_uuid_ms_reserved = GPT_ENT_TYPE_MS_RESERVED; 164 static struct uuid gpt_uuid_ms_ldm_data = GPT_ENT_TYPE_MS_LDM_DATA; 165 static struct uuid gpt_uuid_ms_ldm_metadata = GPT_ENT_TYPE_MS_LDM_METADATA; 166 static struct uuid gpt_uuid_netbsd_ccd = GPT_ENT_TYPE_NETBSD_CCD; 167 static struct uuid gpt_uuid_netbsd_cgd = GPT_ENT_TYPE_NETBSD_CGD; 168 static struct uuid gpt_uuid_netbsd_ffs = GPT_ENT_TYPE_NETBSD_FFS; 169 static struct uuid gpt_uuid_netbsd_lfs = GPT_ENT_TYPE_NETBSD_LFS; 170 static struct uuid gpt_uuid_netbsd_raid = GPT_ENT_TYPE_NETBSD_RAID; 171 static struct uuid gpt_uuid_netbsd_swap = GPT_ENT_TYPE_NETBSD_SWAP; 172 static struct uuid gpt_uuid_mbr = GPT_ENT_TYPE_MBR; 173 static struct uuid gpt_uuid_unused = GPT_ENT_TYPE_UNUSED; 174 175 static struct g_part_uuid_alias { 176 struct uuid *uuid; 177 int alias; 178 } gpt_uuid_alias_match[] = { 179 { &gpt_uuid_apple_boot, G_PART_ALIAS_APPLE_BOOT }, 180 { &gpt_uuid_apple_hfs, G_PART_ALIAS_APPLE_HFS }, 181 { &gpt_uuid_apple_label, G_PART_ALIAS_APPLE_LABEL }, 182 { &gpt_uuid_apple_raid, G_PART_ALIAS_APPLE_RAID }, 183 { &gpt_uuid_apple_raid_offline, G_PART_ALIAS_APPLE_RAID_OFFLINE }, 184 { &gpt_uuid_apple_tv_recovery, G_PART_ALIAS_APPLE_TV_RECOVERY }, 185 { &gpt_uuid_apple_ufs, G_PART_ALIAS_APPLE_UFS }, 186 { &gpt_uuid_bios_boot, G_PART_ALIAS_BIOS_BOOT }, 187 { &gpt_uuid_efi, G_PART_ALIAS_EFI }, 188 { &gpt_uuid_freebsd, G_PART_ALIAS_FREEBSD }, 189 { &gpt_uuid_freebsd_boot, G_PART_ALIAS_FREEBSD_BOOT }, 190 { &gpt_uuid_freebsd_swap, G_PART_ALIAS_FREEBSD_SWAP }, 191 { &gpt_uuid_freebsd_ufs, G_PART_ALIAS_FREEBSD_UFS }, 192 { &gpt_uuid_freebsd_vinum, G_PART_ALIAS_FREEBSD_VINUM }, 193 { &gpt_uuid_freebsd_zfs, G_PART_ALIAS_FREEBSD_ZFS }, 194 { &gpt_uuid_linux_data, G_PART_ALIAS_LINUX_DATA }, 195 { &gpt_uuid_linux_lvm, G_PART_ALIAS_LINUX_LVM }, 196 { &gpt_uuid_linux_raid, G_PART_ALIAS_LINUX_RAID }, 197 { &gpt_uuid_linux_swap, G_PART_ALIAS_LINUX_SWAP }, 198 { &gpt_uuid_mbr, G_PART_ALIAS_MBR }, 199 { &gpt_uuid_ms_basic_data, G_PART_ALIAS_MS_BASIC_DATA }, 200 { &gpt_uuid_ms_ldm_data, G_PART_ALIAS_MS_LDM_DATA }, 201 { &gpt_uuid_ms_ldm_metadata, G_PART_ALIAS_MS_LDM_METADATA }, 202 { &gpt_uuid_ms_reserved, G_PART_ALIAS_MS_RESERVED }, 203 { &gpt_uuid_netbsd_ccd, G_PART_ALIAS_NETBSD_CCD }, 204 { &gpt_uuid_netbsd_cgd, G_PART_ALIAS_NETBSD_CGD }, 205 { &gpt_uuid_netbsd_ffs, G_PART_ALIAS_NETBSD_FFS }, 206 { &gpt_uuid_netbsd_lfs, G_PART_ALIAS_NETBSD_LFS }, 207 { &gpt_uuid_netbsd_raid, G_PART_ALIAS_NETBSD_RAID }, 208 { &gpt_uuid_netbsd_swap, G_PART_ALIAS_NETBSD_SWAP }, 209 210 { NULL, 0 } 211 }; 212 213 static struct gpt_hdr * 214 gpt_read_hdr(struct g_part_gpt_table *table, struct g_consumer *cp, 215 enum gpt_elt elt) 216 { 217 struct gpt_hdr *buf, *hdr; 218 struct g_provider *pp; 219 quad_t lba, last; 220 int error; 221 uint32_t crc, sz; 222 223 pp = cp->provider; 224 last = (pp->mediasize / pp->sectorsize) - 1; 225 table->state[elt] = GPT_STATE_MISSING; 226 /* 227 * If the primary header is valid look for secondary 228 * header in AlternateLBA, otherwise in the last medium's LBA. 229 */ 230 if (elt == GPT_ELT_SECHDR) { 231 if (table->state[GPT_ELT_PRIHDR] != GPT_STATE_OK) 232 table->lba[elt] = last; 233 } else 234 table->lba[elt] = 1; 235 buf = g_read_data(cp, table->lba[elt] * pp->sectorsize, pp->sectorsize, 236 &error); 237 if (buf == NULL) 238 return (NULL); 239 hdr = NULL; 240 if (memcmp(buf->hdr_sig, GPT_HDR_SIG, sizeof(buf->hdr_sig)) != 0) 241 goto fail; 242 243 table->state[elt] = GPT_STATE_CORRUPT; 244 sz = le32toh(buf->hdr_size); 245 if (sz < 92 || sz > pp->sectorsize) 246 goto fail; 247 248 hdr = g_malloc(sz, M_WAITOK | M_ZERO); 249 bcopy(buf, hdr, sz); 250 hdr->hdr_size = sz; 251 252 crc = le32toh(buf->hdr_crc_self); 253 buf->hdr_crc_self = 0; 254 if (crc32(buf, sz) != crc) 255 goto fail; 256 hdr->hdr_crc_self = crc; 257 258 table->state[elt] = GPT_STATE_INVALID; 259 hdr->hdr_revision = le32toh(buf->hdr_revision); 260 if (hdr->hdr_revision < GPT_HDR_REVISION) 261 goto fail; 262 hdr->hdr_lba_self = le64toh(buf->hdr_lba_self); 263 if (hdr->hdr_lba_self != table->lba[elt]) 264 goto fail; 265 hdr->hdr_lba_alt = le64toh(buf->hdr_lba_alt); 266 if (hdr->hdr_lba_alt == hdr->hdr_lba_self || 267 hdr->hdr_lba_alt > last) 268 goto fail; 269 270 /* Check the managed area. */ 271 hdr->hdr_lba_start = le64toh(buf->hdr_lba_start); 272 if (hdr->hdr_lba_start < 2 || hdr->hdr_lba_start >= last) 273 goto fail; 274 hdr->hdr_lba_end = le64toh(buf->hdr_lba_end); 275 if (hdr->hdr_lba_end < hdr->hdr_lba_start || hdr->hdr_lba_end >= last) 276 goto fail; 277 278 /* Check the table location and size of the table. */ 279 hdr->hdr_entries = le32toh(buf->hdr_entries); 280 hdr->hdr_entsz = le32toh(buf->hdr_entsz); 281 if (hdr->hdr_entries == 0 || hdr->hdr_entsz < 128 || 282 (hdr->hdr_entsz & 7) != 0) 283 goto fail; 284 hdr->hdr_lba_table = le64toh(buf->hdr_lba_table); 285 if (hdr->hdr_lba_table < 2 || hdr->hdr_lba_table >= last) 286 goto fail; 287 if (hdr->hdr_lba_table >= hdr->hdr_lba_start && 288 hdr->hdr_lba_table <= hdr->hdr_lba_end) 289 goto fail; 290 lba = hdr->hdr_lba_table + 291 (hdr->hdr_entries * hdr->hdr_entsz + pp->sectorsize - 1) / 292 pp->sectorsize - 1; 293 if (lba >= last) 294 goto fail; 295 if (lba >= hdr->hdr_lba_start && lba <= hdr->hdr_lba_end) 296 goto fail; 297 298 table->state[elt] = GPT_STATE_OK; 299 le_uuid_dec(&buf->hdr_uuid, &hdr->hdr_uuid); 300 hdr->hdr_crc_table = le32toh(buf->hdr_crc_table); 301 302 /* save LBA for secondary header */ 303 if (elt == GPT_ELT_PRIHDR) 304 table->lba[GPT_ELT_SECHDR] = hdr->hdr_lba_alt; 305 306 g_free(buf); 307 return (hdr); 308 309 fail: 310 if (hdr != NULL) 311 g_free(hdr); 312 g_free(buf); 313 return (NULL); 314 } 315 316 static struct gpt_ent * 317 gpt_read_tbl(struct g_part_gpt_table *table, struct g_consumer *cp, 318 enum gpt_elt elt, struct gpt_hdr *hdr) 319 { 320 struct g_provider *pp; 321 struct gpt_ent *ent, *tbl; 322 char *buf, *p; 323 unsigned int idx, sectors, tblsz, size; 324 int error; 325 326 if (hdr == NULL) 327 return (NULL); 328 329 pp = cp->provider; 330 table->lba[elt] = hdr->hdr_lba_table; 331 332 table->state[elt] = GPT_STATE_MISSING; 333 tblsz = hdr->hdr_entries * hdr->hdr_entsz; 334 sectors = (tblsz + pp->sectorsize - 1) / pp->sectorsize; 335 buf = g_malloc(sectors * pp->sectorsize, M_WAITOK | M_ZERO); 336 for (idx = 0; idx < sectors; idx += MAXPHYS / pp->sectorsize) { 337 size = (sectors - idx > MAXPHYS / pp->sectorsize) ? MAXPHYS: 338 (sectors - idx) * pp->sectorsize; 339 p = g_read_data(cp, (table->lba[elt] + idx) * pp->sectorsize, 340 size, &error); 341 if (p == NULL) { 342 g_free(buf); 343 return (NULL); 344 } 345 bcopy(p, buf + idx * pp->sectorsize, size); 346 g_free(p); 347 } 348 table->state[elt] = GPT_STATE_CORRUPT; 349 if (crc32(buf, tblsz) != hdr->hdr_crc_table) { 350 g_free(buf); 351 return (NULL); 352 } 353 354 table->state[elt] = GPT_STATE_OK; 355 tbl = g_malloc(hdr->hdr_entries * sizeof(struct gpt_ent), 356 M_WAITOK | M_ZERO); 357 358 for (idx = 0, ent = tbl, p = buf; 359 idx < hdr->hdr_entries; 360 idx++, ent++, p += hdr->hdr_entsz) { 361 le_uuid_dec(p, &ent->ent_type); 362 le_uuid_dec(p + 16, &ent->ent_uuid); 363 ent->ent_lba_start = le64dec(p + 32); 364 ent->ent_lba_end = le64dec(p + 40); 365 ent->ent_attr = le64dec(p + 48); 366 /* Keep UTF-16 in little-endian. */ 367 bcopy(p + 56, ent->ent_name, sizeof(ent->ent_name)); 368 } 369 370 g_free(buf); 371 return (tbl); 372 } 373 374 static int 375 gpt_matched_hdrs(struct gpt_hdr *pri, struct gpt_hdr *sec) 376 { 377 378 if (pri == NULL || sec == NULL) 379 return (0); 380 381 if (!EQUUID(&pri->hdr_uuid, &sec->hdr_uuid)) 382 return (0); 383 return ((pri->hdr_revision == sec->hdr_revision && 384 pri->hdr_size == sec->hdr_size && 385 pri->hdr_lba_start == sec->hdr_lba_start && 386 pri->hdr_lba_end == sec->hdr_lba_end && 387 pri->hdr_entries == sec->hdr_entries && 388 pri->hdr_entsz == sec->hdr_entsz && 389 pri->hdr_crc_table == sec->hdr_crc_table) ? 1 : 0); 390 } 391 392 static int 393 gpt_parse_type(const char *type, struct uuid *uuid) 394 { 395 struct uuid tmp; 396 const char *alias; 397 int error; 398 struct g_part_uuid_alias *uap; 399 400 if (type[0] == '!') { 401 error = parse_uuid(type + 1, &tmp); 402 if (error) 403 return (error); 404 if (EQUUID(&tmp, &gpt_uuid_unused)) 405 return (EINVAL); 406 *uuid = tmp; 407 return (0); 408 } 409 for (uap = &gpt_uuid_alias_match[0]; uap->uuid; uap++) { 410 alias = g_part_alias_name(uap->alias); 411 if (!strcasecmp(type, alias)) { 412 *uuid = *uap->uuid; 413 return (0); 414 } 415 } 416 return (EINVAL); 417 } 418 419 static int 420 g_part_gpt_add(struct g_part_table *basetable, struct g_part_entry *baseentry, 421 struct g_part_parms *gpp) 422 { 423 struct g_part_gpt_entry *entry; 424 int error; 425 426 entry = (struct g_part_gpt_entry *)baseentry; 427 error = gpt_parse_type(gpp->gpp_type, &entry->ent.ent_type); 428 if (error) 429 return (error); 430 kern_uuidgen(&entry->ent.ent_uuid, 1); 431 entry->ent.ent_lba_start = baseentry->gpe_start; 432 entry->ent.ent_lba_end = baseentry->gpe_end; 433 if (baseentry->gpe_deleted) { 434 entry->ent.ent_attr = 0; 435 bzero(entry->ent.ent_name, sizeof(entry->ent.ent_name)); 436 } 437 if (gpp->gpp_parms & G_PART_PARM_LABEL) 438 g_gpt_utf8_to_utf16(gpp->gpp_label, entry->ent.ent_name, 439 sizeof(entry->ent.ent_name) / 440 sizeof(entry->ent.ent_name[0])); 441 return (0); 442 } 443 444 static int 445 g_part_gpt_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp) 446 { 447 struct g_part_gpt_table *table; 448 size_t codesz; 449 450 codesz = DOSPARTOFF; 451 table = (struct g_part_gpt_table *)basetable; 452 bzero(table->mbr, codesz); 453 codesz = MIN(codesz, gpp->gpp_codesize); 454 if (codesz > 0) 455 bcopy(gpp->gpp_codeptr, table->mbr, codesz); 456 457 /* Mark the PMBR active since some BIOS require it */ 458 table->mbr[DOSPARTOFF] = 0x80; /* status */ 459 return (0); 460 } 461 462 static int 463 g_part_gpt_create(struct g_part_table *basetable, struct g_part_parms *gpp) 464 { 465 struct g_provider *pp; 466 struct g_part_gpt_table *table; 467 quad_t last; 468 size_t tblsz; 469 470 /* We don't nest, which means that our depth should be 0. */ 471 if (basetable->gpt_depth != 0) 472 return (ENXIO); 473 474 table = (struct g_part_gpt_table *)basetable; 475 pp = gpp->gpp_provider; 476 tblsz = (basetable->gpt_entries * sizeof(struct gpt_ent) + 477 pp->sectorsize - 1) / pp->sectorsize; 478 if (pp->sectorsize < MBRSIZE || 479 pp->mediasize < (3 + 2 * tblsz + basetable->gpt_entries) * 480 pp->sectorsize) 481 return (ENOSPC); 482 483 last = (pp->mediasize / pp->sectorsize) - 1; 484 485 le16enc(table->mbr + DOSMAGICOFFSET, DOSMAGIC); 486 table->mbr[DOSPARTOFF + 1] = 0x01; /* shd */ 487 table->mbr[DOSPARTOFF + 2] = 0x01; /* ssect */ 488 table->mbr[DOSPARTOFF + 3] = 0x00; /* scyl */ 489 table->mbr[DOSPARTOFF + 4] = 0xee; /* typ */ 490 table->mbr[DOSPARTOFF + 5] = 0xff; /* ehd */ 491 table->mbr[DOSPARTOFF + 6] = 0xff; /* esect */ 492 table->mbr[DOSPARTOFF + 7] = 0xff; /* ecyl */ 493 le32enc(table->mbr + DOSPARTOFF + 8, 1); /* start */ 494 le32enc(table->mbr + DOSPARTOFF + 12, MIN(last, UINT32_MAX)); 495 496 /* Allocate space for the header */ 497 table->hdr = g_malloc(sizeof(struct gpt_hdr), M_WAITOK | M_ZERO); 498 499 bcopy(GPT_HDR_SIG, table->hdr->hdr_sig, sizeof(table->hdr->hdr_sig)); 500 table->hdr->hdr_revision = GPT_HDR_REVISION; 501 table->hdr->hdr_size = offsetof(struct gpt_hdr, padding); 502 kern_uuidgen(&table->hdr->hdr_uuid, 1); 503 table->hdr->hdr_entries = basetable->gpt_entries; 504 table->hdr->hdr_entsz = sizeof(struct gpt_ent); 505 506 g_gpt_set_defaults(basetable, pp); 507 return (0); 508 } 509 510 static int 511 g_part_gpt_destroy(struct g_part_table *basetable, struct g_part_parms *gpp) 512 { 513 struct g_part_gpt_table *table; 514 struct g_provider *pp; 515 516 table = (struct g_part_gpt_table *)basetable; 517 pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider; 518 g_free(table->hdr); 519 table->hdr = NULL; 520 521 /* 522 * Wipe the first 2 sectors to clear the partitioning. Wipe the last 523 * sector only if it has valid secondary header. 524 */ 525 basetable->gpt_smhead |= 3; 526 if (table->state[GPT_ELT_SECHDR] == GPT_STATE_OK && 527 table->lba[GPT_ELT_SECHDR] == pp->mediasize / pp->sectorsize - 1) 528 basetable->gpt_smtail |= 1; 529 return (0); 530 } 531 532 static void 533 g_part_gpt_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry, 534 struct sbuf *sb, const char *indent) 535 { 536 struct g_part_gpt_entry *entry; 537 538 entry = (struct g_part_gpt_entry *)baseentry; 539 if (indent == NULL) { 540 /* conftxt: libdisk compatibility */ 541 sbuf_printf(sb, " xs GPT xt "); 542 sbuf_printf_uuid(sb, &entry->ent.ent_type); 543 } else if (entry != NULL) { 544 /* confxml: partition entry information */ 545 sbuf_printf(sb, "%s<label>", indent); 546 g_gpt_printf_utf16(sb, entry->ent.ent_name, 547 sizeof(entry->ent.ent_name) >> 1); 548 sbuf_printf(sb, "</label>\n"); 549 if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTME) 550 sbuf_printf(sb, "%s<attrib>bootme</attrib>\n", indent); 551 if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTONCE) { 552 sbuf_printf(sb, "%s<attrib>bootonce</attrib>\n", 553 indent); 554 } 555 if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTFAILED) { 556 sbuf_printf(sb, "%s<attrib>bootfailed</attrib>\n", 557 indent); 558 } 559 sbuf_printf(sb, "%s<rawtype>", indent); 560 sbuf_printf_uuid(sb, &entry->ent.ent_type); 561 sbuf_printf(sb, "</rawtype>\n"); 562 sbuf_printf(sb, "%s<rawuuid>", indent); 563 sbuf_printf_uuid(sb, &entry->ent.ent_uuid); 564 sbuf_printf(sb, "</rawuuid>\n"); 565 } else { 566 /* confxml: scheme information */ 567 } 568 } 569 570 static int 571 g_part_gpt_dumpto(struct g_part_table *table, struct g_part_entry *baseentry) 572 { 573 struct g_part_gpt_entry *entry; 574 575 entry = (struct g_part_gpt_entry *)baseentry; 576 return ((EQUUID(&entry->ent.ent_type, &gpt_uuid_freebsd_swap) || 577 EQUUID(&entry->ent.ent_type, &gpt_uuid_linux_swap)) ? 1 : 0); 578 } 579 580 static int 581 g_part_gpt_modify(struct g_part_table *basetable, 582 struct g_part_entry *baseentry, struct g_part_parms *gpp) 583 { 584 struct g_part_gpt_entry *entry; 585 int error; 586 587 entry = (struct g_part_gpt_entry *)baseentry; 588 if (gpp->gpp_parms & G_PART_PARM_TYPE) { 589 error = gpt_parse_type(gpp->gpp_type, &entry->ent.ent_type); 590 if (error) 591 return (error); 592 } 593 if (gpp->gpp_parms & G_PART_PARM_LABEL) 594 g_gpt_utf8_to_utf16(gpp->gpp_label, entry->ent.ent_name, 595 sizeof(entry->ent.ent_name) / 596 sizeof(entry->ent.ent_name[0])); 597 return (0); 598 } 599 600 static int 601 g_part_gpt_resize(struct g_part_table *basetable, 602 struct g_part_entry *baseentry, struct g_part_parms *gpp) 603 { 604 struct g_part_gpt_entry *entry; 605 entry = (struct g_part_gpt_entry *)baseentry; 606 607 baseentry->gpe_end = baseentry->gpe_start + gpp->gpp_size - 1; 608 entry->ent.ent_lba_end = baseentry->gpe_end; 609 610 return (0); 611 } 612 613 static const char * 614 g_part_gpt_name(struct g_part_table *table, struct g_part_entry *baseentry, 615 char *buf, size_t bufsz) 616 { 617 struct g_part_gpt_entry *entry; 618 char c; 619 620 entry = (struct g_part_gpt_entry *)baseentry; 621 c = (EQUUID(&entry->ent.ent_type, &gpt_uuid_freebsd)) ? 's' : 'p'; 622 snprintf(buf, bufsz, "%c%d", c, baseentry->gpe_index); 623 return (buf); 624 } 625 626 static int 627 g_part_gpt_probe(struct g_part_table *table, struct g_consumer *cp) 628 { 629 struct g_provider *pp; 630 char *buf; 631 int error, res; 632 633 /* We don't nest, which means that our depth should be 0. */ 634 if (table->gpt_depth != 0) 635 return (ENXIO); 636 637 pp = cp->provider; 638 639 /* 640 * Sanity-check the provider. Since the first sector on the provider 641 * must be a PMBR and a PMBR is 512 bytes large, the sector size 642 * must be at least 512 bytes. Also, since the theoretical minimum 643 * number of sectors needed by GPT is 6, any medium that has less 644 * than 6 sectors is never going to be able to hold a GPT. The 645 * number 6 comes from: 646 * 1 sector for the PMBR 647 * 2 sectors for the GPT headers (each 1 sector) 648 * 2 sectors for the GPT tables (each 1 sector) 649 * 1 sector for an actual partition 650 * It's better to catch this pathological case early than behaving 651 * pathologically later on... 652 */ 653 if (pp->sectorsize < MBRSIZE || pp->mediasize < 6 * pp->sectorsize) 654 return (ENOSPC); 655 656 /* Check that there's a MBR. */ 657 buf = g_read_data(cp, 0L, pp->sectorsize, &error); 658 if (buf == NULL) 659 return (error); 660 res = le16dec(buf + DOSMAGICOFFSET); 661 g_free(buf); 662 if (res != DOSMAGIC) 663 return (ENXIO); 664 665 /* Check that there's a primary header. */ 666 buf = g_read_data(cp, pp->sectorsize, pp->sectorsize, &error); 667 if (buf == NULL) 668 return (error); 669 res = memcmp(buf, GPT_HDR_SIG, 8); 670 g_free(buf); 671 if (res == 0) 672 return (G_PART_PROBE_PRI_HIGH); 673 674 /* No primary? Check that there's a secondary. */ 675 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 676 &error); 677 if (buf == NULL) 678 return (error); 679 res = memcmp(buf, GPT_HDR_SIG, 8); 680 g_free(buf); 681 return ((res == 0) ? G_PART_PROBE_PRI_HIGH : ENXIO); 682 } 683 684 static int 685 g_part_gpt_read(struct g_part_table *basetable, struct g_consumer *cp) 686 { 687 struct gpt_hdr *prihdr, *sechdr; 688 struct gpt_ent *tbl, *pritbl, *sectbl; 689 struct g_provider *pp; 690 struct g_part_gpt_table *table; 691 struct g_part_gpt_entry *entry; 692 u_char *buf; 693 uint64_t last; 694 int error, index; 695 696 table = (struct g_part_gpt_table *)basetable; 697 pp = cp->provider; 698 last = (pp->mediasize / pp->sectorsize) - 1; 699 700 /* Read the PMBR */ 701 buf = g_read_data(cp, 0, pp->sectorsize, &error); 702 if (buf == NULL) 703 return (error); 704 bcopy(buf, table->mbr, MBRSIZE); 705 g_free(buf); 706 707 /* Read the primary header and table. */ 708 prihdr = gpt_read_hdr(table, cp, GPT_ELT_PRIHDR); 709 if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK) { 710 pritbl = gpt_read_tbl(table, cp, GPT_ELT_PRITBL, prihdr); 711 } else { 712 table->state[GPT_ELT_PRITBL] = GPT_STATE_MISSING; 713 pritbl = NULL; 714 } 715 716 /* Read the secondary header and table. */ 717 sechdr = gpt_read_hdr(table, cp, GPT_ELT_SECHDR); 718 if (table->state[GPT_ELT_SECHDR] == GPT_STATE_OK) { 719 sectbl = gpt_read_tbl(table, cp, GPT_ELT_SECTBL, sechdr); 720 } else { 721 table->state[GPT_ELT_SECTBL] = GPT_STATE_MISSING; 722 sectbl = NULL; 723 } 724 725 /* Fail if we haven't got any good tables at all. */ 726 if (table->state[GPT_ELT_PRITBL] != GPT_STATE_OK && 727 table->state[GPT_ELT_SECTBL] != GPT_STATE_OK) { 728 printf("GEOM: %s: corrupt or invalid GPT detected.\n", 729 pp->name); 730 printf("GEOM: %s: GPT rejected -- may not be recoverable.\n", 731 pp->name); 732 return (EINVAL); 733 } 734 735 /* 736 * If both headers are good but they disagree with each other, 737 * then invalidate one. We prefer to keep the primary header, 738 * unless the primary table is corrupt. 739 */ 740 if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK && 741 table->state[GPT_ELT_SECHDR] == GPT_STATE_OK && 742 !gpt_matched_hdrs(prihdr, sechdr)) { 743 if (table->state[GPT_ELT_PRITBL] == GPT_STATE_OK) { 744 table->state[GPT_ELT_SECHDR] = GPT_STATE_INVALID; 745 table->state[GPT_ELT_SECTBL] = GPT_STATE_MISSING; 746 g_free(sechdr); 747 sechdr = NULL; 748 } else { 749 table->state[GPT_ELT_PRIHDR] = GPT_STATE_INVALID; 750 table->state[GPT_ELT_PRITBL] = GPT_STATE_MISSING; 751 g_free(prihdr); 752 prihdr = NULL; 753 } 754 } 755 756 if (table->state[GPT_ELT_PRITBL] != GPT_STATE_OK) { 757 printf("GEOM: %s: the primary GPT table is corrupt or " 758 "invalid.\n", pp->name); 759 printf("GEOM: %s: using the secondary instead -- recovery " 760 "strongly advised.\n", pp->name); 761 table->hdr = sechdr; 762 basetable->gpt_corrupt = 1; 763 if (prihdr != NULL) 764 g_free(prihdr); 765 tbl = sectbl; 766 if (pritbl != NULL) 767 g_free(pritbl); 768 } else { 769 if (table->state[GPT_ELT_SECTBL] != GPT_STATE_OK) { 770 printf("GEOM: %s: the secondary GPT table is corrupt " 771 "or invalid.\n", pp->name); 772 printf("GEOM: %s: using the primary only -- recovery " 773 "suggested.\n", pp->name); 774 basetable->gpt_corrupt = 1; 775 } else if (table->lba[GPT_ELT_SECHDR] != last) { 776 printf( "GEOM: %s: the secondary GPT header is not in " 777 "the last LBA.\n", pp->name); 778 basetable->gpt_corrupt = 1; 779 } 780 table->hdr = prihdr; 781 if (sechdr != NULL) 782 g_free(sechdr); 783 tbl = pritbl; 784 if (sectbl != NULL) 785 g_free(sectbl); 786 } 787 788 basetable->gpt_first = table->hdr->hdr_lba_start; 789 basetable->gpt_last = table->hdr->hdr_lba_end; 790 basetable->gpt_entries = table->hdr->hdr_entries; 791 792 for (index = basetable->gpt_entries - 1; index >= 0; index--) { 793 if (EQUUID(&tbl[index].ent_type, &gpt_uuid_unused)) 794 continue; 795 entry = (struct g_part_gpt_entry *)g_part_new_entry( 796 basetable, index + 1, tbl[index].ent_lba_start, 797 tbl[index].ent_lba_end); 798 entry->ent = tbl[index]; 799 } 800 801 g_free(tbl); 802 return (0); 803 } 804 805 static int 806 g_part_gpt_recover(struct g_part_table *basetable) 807 { 808 809 g_gpt_set_defaults(basetable, 810 LIST_FIRST(&basetable->gpt_gp->consumer)->provider); 811 basetable->gpt_corrupt = 0; 812 return (0); 813 } 814 815 static int 816 g_part_gpt_setunset(struct g_part_table *table, struct g_part_entry *baseentry, 817 const char *attrib, unsigned int set) 818 { 819 struct g_part_entry *iter; 820 struct g_part_gpt_entry *entry; 821 int changed, bootme, bootonce, bootfailed; 822 823 bootme = bootonce = bootfailed = 0; 824 if (strcasecmp(attrib, "bootme") == 0) { 825 bootme = 1; 826 } else if (strcasecmp(attrib, "bootonce") == 0) { 827 /* BOOTME is set automatically with BOOTONCE, but not unset. */ 828 bootonce = 1; 829 if (set) 830 bootme = 1; 831 } else if (strcasecmp(attrib, "bootfailed") == 0) { 832 /* 833 * It should only be possible to unset BOOTFAILED, but it might 834 * be useful for test purposes to also be able to set it. 835 */ 836 bootfailed = 1; 837 } 838 if (!bootme && !bootonce && !bootfailed) 839 return (EINVAL); 840 841 LIST_FOREACH(iter, &table->gpt_entry, gpe_entry) { 842 if (iter->gpe_deleted) 843 continue; 844 if (iter != baseentry) 845 continue; 846 changed = 0; 847 entry = (struct g_part_gpt_entry *)iter; 848 if (set) { 849 if (bootme && 850 !(entry->ent.ent_attr & GPT_ENT_ATTR_BOOTME)) { 851 entry->ent.ent_attr |= GPT_ENT_ATTR_BOOTME; 852 changed = 1; 853 } 854 if (bootonce && 855 !(entry->ent.ent_attr & GPT_ENT_ATTR_BOOTONCE)) { 856 entry->ent.ent_attr |= GPT_ENT_ATTR_BOOTONCE; 857 changed = 1; 858 } 859 if (bootfailed && 860 !(entry->ent.ent_attr & GPT_ENT_ATTR_BOOTFAILED)) { 861 entry->ent.ent_attr |= GPT_ENT_ATTR_BOOTFAILED; 862 changed = 1; 863 } 864 } else { 865 if (bootme && 866 (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTME)) { 867 entry->ent.ent_attr &= ~GPT_ENT_ATTR_BOOTME; 868 changed = 1; 869 } 870 if (bootonce && 871 (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTONCE)) { 872 entry->ent.ent_attr &= ~GPT_ENT_ATTR_BOOTONCE; 873 changed = 1; 874 } 875 if (bootfailed && 876 (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTFAILED)) { 877 entry->ent.ent_attr &= ~GPT_ENT_ATTR_BOOTFAILED; 878 changed = 1; 879 } 880 } 881 if (changed && !iter->gpe_created) 882 iter->gpe_modified = 1; 883 } 884 return (0); 885 } 886 887 static const char * 888 g_part_gpt_type(struct g_part_table *basetable, struct g_part_entry *baseentry, 889 char *buf, size_t bufsz) 890 { 891 struct g_part_gpt_entry *entry; 892 struct uuid *type; 893 struct g_part_uuid_alias *uap; 894 895 entry = (struct g_part_gpt_entry *)baseentry; 896 type = &entry->ent.ent_type; 897 for (uap = &gpt_uuid_alias_match[0]; uap->uuid; uap++) 898 if (EQUUID(type, uap->uuid)) 899 return (g_part_alias_name(uap->alias)); 900 buf[0] = '!'; 901 snprintf_uuid(buf + 1, bufsz - 1, type); 902 903 return (buf); 904 } 905 906 static int 907 g_part_gpt_write(struct g_part_table *basetable, struct g_consumer *cp) 908 { 909 unsigned char *buf, *bp; 910 struct g_provider *pp; 911 struct g_part_entry *baseentry; 912 struct g_part_gpt_entry *entry; 913 struct g_part_gpt_table *table; 914 size_t tblsz; 915 uint32_t crc; 916 int error, index; 917 918 pp = cp->provider; 919 table = (struct g_part_gpt_table *)basetable; 920 tblsz = (table->hdr->hdr_entries * table->hdr->hdr_entsz + 921 pp->sectorsize - 1) / pp->sectorsize; 922 923 /* Write the PMBR */ 924 buf = g_malloc(pp->sectorsize, M_WAITOK | M_ZERO); 925 bcopy(table->mbr, buf, MBRSIZE); 926 error = g_write_data(cp, 0, buf, pp->sectorsize); 927 g_free(buf); 928 if (error) 929 return (error); 930 931 /* Allocate space for the header and entries. */ 932 buf = g_malloc((tblsz + 1) * pp->sectorsize, M_WAITOK | M_ZERO); 933 934 memcpy(buf, table->hdr->hdr_sig, sizeof(table->hdr->hdr_sig)); 935 le32enc(buf + 8, table->hdr->hdr_revision); 936 le32enc(buf + 12, table->hdr->hdr_size); 937 le64enc(buf + 40, table->hdr->hdr_lba_start); 938 le64enc(buf + 48, table->hdr->hdr_lba_end); 939 le_uuid_enc(buf + 56, &table->hdr->hdr_uuid); 940 le32enc(buf + 80, table->hdr->hdr_entries); 941 le32enc(buf + 84, table->hdr->hdr_entsz); 942 943 LIST_FOREACH(baseentry, &basetable->gpt_entry, gpe_entry) { 944 if (baseentry->gpe_deleted) 945 continue; 946 entry = (struct g_part_gpt_entry *)baseentry; 947 index = baseentry->gpe_index - 1; 948 bp = buf + pp->sectorsize + table->hdr->hdr_entsz * index; 949 le_uuid_enc(bp, &entry->ent.ent_type); 950 le_uuid_enc(bp + 16, &entry->ent.ent_uuid); 951 le64enc(bp + 32, entry->ent.ent_lba_start); 952 le64enc(bp + 40, entry->ent.ent_lba_end); 953 le64enc(bp + 48, entry->ent.ent_attr); 954 memcpy(bp + 56, entry->ent.ent_name, 955 sizeof(entry->ent.ent_name)); 956 } 957 958 crc = crc32(buf + pp->sectorsize, 959 table->hdr->hdr_entries * table->hdr->hdr_entsz); 960 le32enc(buf + 88, crc); 961 962 /* Write primary meta-data. */ 963 le32enc(buf + 16, 0); /* hdr_crc_self. */ 964 le64enc(buf + 24, table->lba[GPT_ELT_PRIHDR]); /* hdr_lba_self. */ 965 le64enc(buf + 32, table->lba[GPT_ELT_SECHDR]); /* hdr_lba_alt. */ 966 le64enc(buf + 72, table->lba[GPT_ELT_PRITBL]); /* hdr_lba_table. */ 967 crc = crc32(buf, table->hdr->hdr_size); 968 le32enc(buf + 16, crc); 969 970 for (index = 0; index < tblsz; index += MAXPHYS / pp->sectorsize) { 971 error = g_write_data(cp, 972 (table->lba[GPT_ELT_PRITBL] + index) * pp->sectorsize, 973 buf + (index + 1) * pp->sectorsize, 974 (tblsz - index > MAXPHYS / pp->sectorsize) ? MAXPHYS: 975 (tblsz - index) * pp->sectorsize); 976 if (error) 977 goto out; 978 } 979 error = g_write_data(cp, table->lba[GPT_ELT_PRIHDR] * pp->sectorsize, 980 buf, pp->sectorsize); 981 if (error) 982 goto out; 983 984 /* Write secondary meta-data. */ 985 le32enc(buf + 16, 0); /* hdr_crc_self. */ 986 le64enc(buf + 24, table->lba[GPT_ELT_SECHDR]); /* hdr_lba_self. */ 987 le64enc(buf + 32, table->lba[GPT_ELT_PRIHDR]); /* hdr_lba_alt. */ 988 le64enc(buf + 72, table->lba[GPT_ELT_SECTBL]); /* hdr_lba_table. */ 989 crc = crc32(buf, table->hdr->hdr_size); 990 le32enc(buf + 16, crc); 991 992 for (index = 0; index < tblsz; index += MAXPHYS / pp->sectorsize) { 993 error = g_write_data(cp, 994 (table->lba[GPT_ELT_SECTBL] + index) * pp->sectorsize, 995 buf + (index + 1) * pp->sectorsize, 996 (tblsz - index > MAXPHYS / pp->sectorsize) ? MAXPHYS: 997 (tblsz - index) * pp->sectorsize); 998 if (error) 999 goto out; 1000 } 1001 error = g_write_data(cp, table->lba[GPT_ELT_SECHDR] * pp->sectorsize, 1002 buf, pp->sectorsize); 1003 1004 out: 1005 g_free(buf); 1006 return (error); 1007 } 1008 1009 static void 1010 g_gpt_set_defaults(struct g_part_table *basetable, struct g_provider *pp) 1011 { 1012 struct g_part_gpt_table *table; 1013 quad_t last; 1014 size_t tblsz; 1015 1016 table = (struct g_part_gpt_table *)basetable; 1017 last = pp->mediasize / pp->sectorsize - 1; 1018 tblsz = (basetable->gpt_entries * sizeof(struct gpt_ent) + 1019 pp->sectorsize - 1) / pp->sectorsize; 1020 1021 table->lba[GPT_ELT_PRIHDR] = 1; 1022 table->lba[GPT_ELT_PRITBL] = 2; 1023 table->lba[GPT_ELT_SECHDR] = last; 1024 table->lba[GPT_ELT_SECTBL] = last - tblsz; 1025 table->state[GPT_ELT_PRIHDR] = GPT_STATE_OK; 1026 table->state[GPT_ELT_PRITBL] = GPT_STATE_OK; 1027 table->state[GPT_ELT_SECHDR] = GPT_STATE_OK; 1028 table->state[GPT_ELT_SECTBL] = GPT_STATE_OK; 1029 1030 table->hdr->hdr_lba_start = 2 + tblsz; 1031 table->hdr->hdr_lba_end = last - tblsz - 1; 1032 1033 basetable->gpt_first = table->hdr->hdr_lba_start; 1034 basetable->gpt_last = table->hdr->hdr_lba_end; 1035 } 1036 1037 static void 1038 g_gpt_printf_utf16(struct sbuf *sb, uint16_t *str, size_t len) 1039 { 1040 u_int bo; 1041 uint32_t ch; 1042 uint16_t c; 1043 1044 bo = LITTLE_ENDIAN; /* GPT is little-endian */ 1045 while (len > 0 && *str != 0) { 1046 ch = (bo == BIG_ENDIAN) ? be16toh(*str) : le16toh(*str); 1047 str++, len--; 1048 if ((ch & 0xf800) == 0xd800) { 1049 if (len > 0) { 1050 c = (bo == BIG_ENDIAN) ? be16toh(*str) 1051 : le16toh(*str); 1052 str++, len--; 1053 } else 1054 c = 0xfffd; 1055 if ((ch & 0x400) == 0 && (c & 0xfc00) == 0xdc00) { 1056 ch = ((ch & 0x3ff) << 10) + (c & 0x3ff); 1057 ch += 0x10000; 1058 } else 1059 ch = 0xfffd; 1060 } else if (ch == 0xfffe) { /* BOM (U+FEFF) swapped. */ 1061 bo = (bo == BIG_ENDIAN) ? LITTLE_ENDIAN : BIG_ENDIAN; 1062 continue; 1063 } else if (ch == 0xfeff) /* BOM (U+FEFF) unswapped. */ 1064 continue; 1065 1066 /* Write the Unicode character in UTF-8 */ 1067 if (ch < 0x80) 1068 sbuf_printf(sb, "%c", ch); 1069 else if (ch < 0x800) 1070 sbuf_printf(sb, "%c%c", 0xc0 | (ch >> 6), 1071 0x80 | (ch & 0x3f)); 1072 else if (ch < 0x10000) 1073 sbuf_printf(sb, "%c%c%c", 0xe0 | (ch >> 12), 1074 0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f)); 1075 else if (ch < 0x200000) 1076 sbuf_printf(sb, "%c%c%c%c", 0xf0 | (ch >> 18), 1077 0x80 | ((ch >> 12) & 0x3f), 1078 0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f)); 1079 } 1080 } 1081 1082 static void 1083 g_gpt_utf8_to_utf16(const uint8_t *s8, uint16_t *s16, size_t s16len) 1084 { 1085 size_t s16idx, s8idx; 1086 uint32_t utfchar; 1087 unsigned int c, utfbytes; 1088 1089 s8idx = s16idx = 0; 1090 utfchar = 0; 1091 utfbytes = 0; 1092 bzero(s16, s16len << 1); 1093 while (s8[s8idx] != 0 && s16idx < s16len) { 1094 c = s8[s8idx++]; 1095 if ((c & 0xc0) != 0x80) { 1096 /* Initial characters. */ 1097 if (utfbytes != 0) { 1098 /* Incomplete encoding of previous char. */ 1099 s16[s16idx++] = htole16(0xfffd); 1100 } 1101 if ((c & 0xf8) == 0xf0) { 1102 utfchar = c & 0x07; 1103 utfbytes = 3; 1104 } else if ((c & 0xf0) == 0xe0) { 1105 utfchar = c & 0x0f; 1106 utfbytes = 2; 1107 } else if ((c & 0xe0) == 0xc0) { 1108 utfchar = c & 0x1f; 1109 utfbytes = 1; 1110 } else { 1111 utfchar = c & 0x7f; 1112 utfbytes = 0; 1113 } 1114 } else { 1115 /* Followup characters. */ 1116 if (utfbytes > 0) { 1117 utfchar = (utfchar << 6) + (c & 0x3f); 1118 utfbytes--; 1119 } else if (utfbytes == 0) 1120 utfbytes = ~0; 1121 } 1122 /* 1123 * Write the complete Unicode character as UTF-16 when we 1124 * have all the UTF-8 charactars collected. 1125 */ 1126 if (utfbytes == 0) { 1127 /* 1128 * If we need to write 2 UTF-16 characters, but 1129 * we only have room for 1, then we truncate the 1130 * string by writing a 0 instead. 1131 */ 1132 if (utfchar >= 0x10000 && s16idx < s16len - 1) { 1133 s16[s16idx++] = 1134 htole16(0xd800 | ((utfchar >> 10) - 0x40)); 1135 s16[s16idx++] = 1136 htole16(0xdc00 | (utfchar & 0x3ff)); 1137 } else 1138 s16[s16idx++] = (utfchar >= 0x10000) ? 0 : 1139 htole16(utfchar); 1140 } 1141 } 1142 /* 1143 * If our input string was truncated, append an invalid encoding 1144 * character to the output string. 1145 */ 1146 if (utfbytes != 0 && s16idx < s16len) 1147 s16[s16idx++] = htole16(0xfffd); 1148 }
Cache object: 42d56cd17536942cf82e8d75721ecb2f
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