1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2002, 2005-2007, 2011 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/cdefs.h> 30__FBSDID("$FreeBSD$"); 31 32#include <sys/param.h> 33#include <sys/bio.h> 34#include <sys/diskmbr.h> 35#include <sys/endian.h> 36#include <sys/gpt.h> 37#include <sys/kernel.h> 38#include <sys/kobj.h> 39#include <sys/limits.h> 40#include <sys/lock.h> 41#include <sys/malloc.h> 42#include <sys/mutex.h> 43#include <sys/queue.h> 44#include <sys/sbuf.h> 45#include <sys/systm.h> 46#include <sys/sysctl.h> 47#include <sys/uuid.h> 48#include <geom/geom.h> 49#include <geom/geom_int.h> 50#include <geom/part/g_part.h> 51 52#include "g_part_if.h" 53 54FEATURE(geom_part_gpt, "GEOM partitioning class for GPT partitions support"); 55 56SYSCTL_DECL(_kern_geom_part); 57static SYSCTL_NODE(_kern_geom_part, OID_AUTO, gpt, CTLFLAG_RW, 0, 58 "GEOM_PART_GPT GUID Partition Table"); 59 60static u_int allow_nesting = 0; 61SYSCTL_UINT(_kern_geom_part_gpt, OID_AUTO, allow_nesting, 62 CTLFLAG_RWTUN, &allow_nesting, 0, "Allow GPT to be nested inside other schemes"); 63 64CTASSERT(offsetof(struct gpt_hdr, padding) == 92); 65CTASSERT(sizeof(struct gpt_ent) == 128); 66 67extern u_int geom_part_check_integrity; 68 69#define EQUUID(a,b) (memcmp(a, b, sizeof(struct uuid)) == 0) 70 71#define MBRSIZE 512 72 73enum gpt_elt { 74 GPT_ELT_PRIHDR, 75 GPT_ELT_PRITBL, 76 GPT_ELT_SECHDR, 77 GPT_ELT_SECTBL, 78 GPT_ELT_COUNT 79}; 80 81enum gpt_state { 82 GPT_STATE_UNKNOWN, /* Not determined. */ 83 GPT_STATE_MISSING, /* No signature found. */ 84 GPT_STATE_CORRUPT, /* Checksum mismatch. */ 85 GPT_STATE_INVALID, /* Nonconformant/invalid. */ 86 GPT_STATE_OK /* Perfectly fine. */ 87}; 88 89struct g_part_gpt_table { 90 struct g_part_table base; 91 u_char mbr[MBRSIZE]; 92 struct gpt_hdr *hdr; 93 quad_t lba[GPT_ELT_COUNT]; 94 enum gpt_state state[GPT_ELT_COUNT]; 95 int bootcamp; 96}; 97 98struct g_part_gpt_entry { 99 struct g_part_entry base; 100 struct gpt_ent ent; 101}; 102 103static void g_gpt_printf_utf16(struct sbuf *, uint16_t *, size_t); 104static void g_gpt_utf8_to_utf16(const uint8_t *, uint16_t *, size_t); 105static void g_gpt_set_defaults(struct g_part_table *, struct g_provider *); 106 107static int g_part_gpt_add(struct g_part_table *, struct g_part_entry *, 108 struct g_part_parms *); 109static int g_part_gpt_bootcode(struct g_part_table *, struct g_part_parms *); 110static int g_part_gpt_create(struct g_part_table *, struct g_part_parms *); 111static int g_part_gpt_destroy(struct g_part_table *, struct g_part_parms *); 112static void g_part_gpt_dumpconf(struct g_part_table *, struct g_part_entry *, 113 struct sbuf *, const char *); 114static int g_part_gpt_dumpto(struct g_part_table *, struct g_part_entry *); 115static int g_part_gpt_modify(struct g_part_table *, struct g_part_entry *, 116 struct g_part_parms *); 117static const char *g_part_gpt_name(struct g_part_table *, struct g_part_entry *, 118 char *, size_t); 119static int g_part_gpt_probe(struct g_part_table *, struct g_consumer *); 120static int g_part_gpt_read(struct g_part_table *, struct g_consumer *); 121static int g_part_gpt_setunset(struct g_part_table *table, 122 struct g_part_entry *baseentry, const char *attrib, unsigned int set); 123static const char *g_part_gpt_type(struct g_part_table *, struct g_part_entry *, 124 char *, size_t); 125static int g_part_gpt_write(struct g_part_table *, struct g_consumer *); 126static int g_part_gpt_resize(struct g_part_table *, struct g_part_entry *, 127 struct g_part_parms *); 128static int g_part_gpt_recover(struct g_part_table *); 129 130static kobj_method_t g_part_gpt_methods[] = { 131 KOBJMETHOD(g_part_add, g_part_gpt_add), 132 KOBJMETHOD(g_part_bootcode, g_part_gpt_bootcode), 133 KOBJMETHOD(g_part_create, g_part_gpt_create), 134 KOBJMETHOD(g_part_destroy, g_part_gpt_destroy), 135 KOBJMETHOD(g_part_dumpconf, g_part_gpt_dumpconf), 136 KOBJMETHOD(g_part_dumpto, g_part_gpt_dumpto), 137 KOBJMETHOD(g_part_modify, g_part_gpt_modify), 138 KOBJMETHOD(g_part_resize, g_part_gpt_resize), 139 KOBJMETHOD(g_part_name, g_part_gpt_name), 140 KOBJMETHOD(g_part_probe, g_part_gpt_probe), 141 KOBJMETHOD(g_part_read, g_part_gpt_read), 142 KOBJMETHOD(g_part_recover, g_part_gpt_recover), 143 KOBJMETHOD(g_part_setunset, g_part_gpt_setunset), 144 KOBJMETHOD(g_part_type, g_part_gpt_type), 145 KOBJMETHOD(g_part_write, g_part_gpt_write), 146 { 0, 0 } 147}; 148 149static struct g_part_scheme g_part_gpt_scheme = { 150 "GPT", 151 g_part_gpt_methods, 152 sizeof(struct g_part_gpt_table), 153 .gps_entrysz = sizeof(struct g_part_gpt_entry), 154 .gps_minent = 128, 155 .gps_maxent = 4096, 156 .gps_bootcodesz = MBRSIZE, 157}; 158G_PART_SCHEME_DECLARE(g_part_gpt); 159MODULE_VERSION(geom_part_gpt, 0); 160 161static struct uuid gpt_uuid_apple_apfs = GPT_ENT_TYPE_APPLE_APFS; 162static struct uuid gpt_uuid_apple_boot = GPT_ENT_TYPE_APPLE_BOOT; 163static struct uuid gpt_uuid_apple_core_storage = 164 GPT_ENT_TYPE_APPLE_CORE_STORAGE; 165static struct uuid gpt_uuid_apple_hfs = GPT_ENT_TYPE_APPLE_HFS; 166static struct uuid gpt_uuid_apple_label = GPT_ENT_TYPE_APPLE_LABEL; 167static struct uuid gpt_uuid_apple_raid = GPT_ENT_TYPE_APPLE_RAID; 168static struct uuid gpt_uuid_apple_raid_offline = GPT_ENT_TYPE_APPLE_RAID_OFFLINE; 169static struct uuid gpt_uuid_apple_tv_recovery = GPT_ENT_TYPE_APPLE_TV_RECOVERY; 170static struct uuid gpt_uuid_apple_ufs = GPT_ENT_TYPE_APPLE_UFS; 171static struct uuid gpt_uuid_bios_boot = GPT_ENT_TYPE_BIOS_BOOT; 172static struct uuid gpt_uuid_chromeos_firmware = GPT_ENT_TYPE_CHROMEOS_FIRMWARE; 173static struct uuid gpt_uuid_chromeos_kernel = GPT_ENT_TYPE_CHROMEOS_KERNEL; 174static struct uuid gpt_uuid_chromeos_reserved = GPT_ENT_TYPE_CHROMEOS_RESERVED; 175static struct uuid gpt_uuid_chromeos_root = GPT_ENT_TYPE_CHROMEOS_ROOT; 176static struct uuid gpt_uuid_dfbsd_ccd = GPT_ENT_TYPE_DRAGONFLY_CCD; 177static struct uuid gpt_uuid_dfbsd_hammer = GPT_ENT_TYPE_DRAGONFLY_HAMMER; 178static struct uuid gpt_uuid_dfbsd_hammer2 = GPT_ENT_TYPE_DRAGONFLY_HAMMER2; 179static struct uuid gpt_uuid_dfbsd_label32 = GPT_ENT_TYPE_DRAGONFLY_LABEL32; 180static struct uuid gpt_uuid_dfbsd_label64 = GPT_ENT_TYPE_DRAGONFLY_LABEL64; 181static struct uuid gpt_uuid_dfbsd_legacy = GPT_ENT_TYPE_DRAGONFLY_LEGACY; 182static struct uuid gpt_uuid_dfbsd_swap = GPT_ENT_TYPE_DRAGONFLY_SWAP; 183static struct uuid gpt_uuid_dfbsd_ufs1 = GPT_ENT_TYPE_DRAGONFLY_UFS1; 184static struct uuid gpt_uuid_dfbsd_vinum = GPT_ENT_TYPE_DRAGONFLY_VINUM; 185static struct uuid gpt_uuid_efi = GPT_ENT_TYPE_EFI; 186static struct uuid gpt_uuid_freebsd = GPT_ENT_TYPE_FREEBSD; 187static struct uuid gpt_uuid_freebsd_boot = GPT_ENT_TYPE_FREEBSD_BOOT; 188static struct uuid gpt_uuid_freebsd_nandfs = GPT_ENT_TYPE_FREEBSD_NANDFS; 189static struct uuid gpt_uuid_freebsd_swap = GPT_ENT_TYPE_FREEBSD_SWAP; 190static struct uuid gpt_uuid_freebsd_ufs = GPT_ENT_TYPE_FREEBSD_UFS; 191static struct uuid gpt_uuid_freebsd_vinum = GPT_ENT_TYPE_FREEBSD_VINUM; 192static struct uuid gpt_uuid_freebsd_zfs = GPT_ENT_TYPE_FREEBSD_ZFS; 193static struct uuid gpt_uuid_linux_data = GPT_ENT_TYPE_LINUX_DATA; 194static struct uuid gpt_uuid_linux_lvm = GPT_ENT_TYPE_LINUX_LVM; 195static struct uuid gpt_uuid_linux_raid = GPT_ENT_TYPE_LINUX_RAID; 196static struct uuid gpt_uuid_linux_swap = GPT_ENT_TYPE_LINUX_SWAP; 197static struct uuid gpt_uuid_mbr = GPT_ENT_TYPE_MBR; 198static struct uuid gpt_uuid_ms_basic_data = GPT_ENT_TYPE_MS_BASIC_DATA; 199static struct uuid gpt_uuid_ms_ldm_data = GPT_ENT_TYPE_MS_LDM_DATA; 200static struct uuid gpt_uuid_ms_ldm_metadata = GPT_ENT_TYPE_MS_LDM_METADATA; 201static struct uuid gpt_uuid_ms_recovery = GPT_ENT_TYPE_MS_RECOVERY; 202static struct uuid gpt_uuid_ms_reserved = GPT_ENT_TYPE_MS_RESERVED; 203static struct uuid gpt_uuid_ms_spaces = GPT_ENT_TYPE_MS_SPACES; 204static struct uuid gpt_uuid_netbsd_ccd = GPT_ENT_TYPE_NETBSD_CCD; 205static struct uuid gpt_uuid_netbsd_cgd = GPT_ENT_TYPE_NETBSD_CGD; 206static struct uuid gpt_uuid_netbsd_ffs = GPT_ENT_TYPE_NETBSD_FFS; 207static struct uuid gpt_uuid_netbsd_lfs = GPT_ENT_TYPE_NETBSD_LFS; 208static struct uuid gpt_uuid_netbsd_raid = GPT_ENT_TYPE_NETBSD_RAID; 209static struct uuid gpt_uuid_netbsd_swap = GPT_ENT_TYPE_NETBSD_SWAP; 210static struct uuid gpt_uuid_openbsd_data = GPT_ENT_TYPE_OPENBSD_DATA; 211static struct uuid gpt_uuid_prep_boot = GPT_ENT_TYPE_PREP_BOOT; 212static struct uuid gpt_uuid_unused = GPT_ENT_TYPE_UNUSED; 213static struct uuid gpt_uuid_vmfs = GPT_ENT_TYPE_VMFS; 214static struct uuid gpt_uuid_vmkdiag = GPT_ENT_TYPE_VMKDIAG; 215static struct uuid gpt_uuid_vmreserved = GPT_ENT_TYPE_VMRESERVED; 216static struct uuid gpt_uuid_vmvsanhdr = GPT_ENT_TYPE_VMVSANHDR; 217 218static struct g_part_uuid_alias { 219 struct uuid *uuid; 220 int alias; 221 int mbrtype; 222} gpt_uuid_alias_match[] = { 223 { &gpt_uuid_apple_apfs, G_PART_ALIAS_APPLE_APFS, 0 }, 224 { &gpt_uuid_apple_boot, G_PART_ALIAS_APPLE_BOOT, 0xab }, 225 { &gpt_uuid_apple_core_storage, G_PART_ALIAS_APPLE_CORE_STORAGE, 0 }, 226 { &gpt_uuid_apple_hfs, G_PART_ALIAS_APPLE_HFS, 0xaf }, 227 { &gpt_uuid_apple_label, G_PART_ALIAS_APPLE_LABEL, 0 }, 228 { &gpt_uuid_apple_raid, G_PART_ALIAS_APPLE_RAID, 0 }, 229 { &gpt_uuid_apple_raid_offline, G_PART_ALIAS_APPLE_RAID_OFFLINE, 0 }, 230 { &gpt_uuid_apple_tv_recovery, G_PART_ALIAS_APPLE_TV_RECOVERY, 0 }, 231 { &gpt_uuid_apple_ufs, G_PART_ALIAS_APPLE_UFS, 0 }, 232 { &gpt_uuid_bios_boot, G_PART_ALIAS_BIOS_BOOT, 0 }, 233 { &gpt_uuid_chromeos_firmware, G_PART_ALIAS_CHROMEOS_FIRMWARE, 0 }, 234 { &gpt_uuid_chromeos_kernel, G_PART_ALIAS_CHROMEOS_KERNEL, 0 }, 235 { &gpt_uuid_chromeos_reserved, G_PART_ALIAS_CHROMEOS_RESERVED, 0 }, 236 { &gpt_uuid_chromeos_root, G_PART_ALIAS_CHROMEOS_ROOT, 0 }, 237 { &gpt_uuid_dfbsd_ccd, G_PART_ALIAS_DFBSD_CCD, 0 }, 238 { &gpt_uuid_dfbsd_hammer, G_PART_ALIAS_DFBSD_HAMMER, 0 }, 239 { &gpt_uuid_dfbsd_hammer2, G_PART_ALIAS_DFBSD_HAMMER2, 0 }, 240 { &gpt_uuid_dfbsd_label32, G_PART_ALIAS_DFBSD, 0xa5 }, 241 { &gpt_uuid_dfbsd_label64, G_PART_ALIAS_DFBSD64, 0xa5 }, 242 { &gpt_uuid_dfbsd_legacy, G_PART_ALIAS_DFBSD_LEGACY, 0 }, 243 { &gpt_uuid_dfbsd_swap, G_PART_ALIAS_DFBSD_SWAP, 0 }, 244 { &gpt_uuid_dfbsd_ufs1, G_PART_ALIAS_DFBSD_UFS, 0 }, 245 { &gpt_uuid_dfbsd_vinum, G_PART_ALIAS_DFBSD_VINUM, 0 }, 246 { &gpt_uuid_efi, G_PART_ALIAS_EFI, 0xee }, 247 { &gpt_uuid_freebsd, G_PART_ALIAS_FREEBSD, 0xa5 }, 248 { &gpt_uuid_freebsd_boot, G_PART_ALIAS_FREEBSD_BOOT, 0 }, 249 { &gpt_uuid_freebsd_nandfs, G_PART_ALIAS_FREEBSD_NANDFS, 0 }, 250 { &gpt_uuid_freebsd_swap, G_PART_ALIAS_FREEBSD_SWAP, 0 }, 251 { &gpt_uuid_freebsd_ufs, G_PART_ALIAS_FREEBSD_UFS, 0 }, 252 { &gpt_uuid_freebsd_vinum, G_PART_ALIAS_FREEBSD_VINUM, 0 }, 253 { &gpt_uuid_freebsd_zfs, G_PART_ALIAS_FREEBSD_ZFS, 0 }, 254 { &gpt_uuid_linux_data, G_PART_ALIAS_LINUX_DATA, 0x0b }, 255 { &gpt_uuid_linux_lvm, G_PART_ALIAS_LINUX_LVM, 0 }, 256 { &gpt_uuid_linux_raid, G_PART_ALIAS_LINUX_RAID, 0 }, 257 { &gpt_uuid_linux_swap, G_PART_ALIAS_LINUX_SWAP, 0 }, 258 { &gpt_uuid_mbr, G_PART_ALIAS_MBR, 0 }, 259 { &gpt_uuid_ms_basic_data, G_PART_ALIAS_MS_BASIC_DATA, 0x0b }, 260 { &gpt_uuid_ms_ldm_data, G_PART_ALIAS_MS_LDM_DATA, 0 }, 261 { &gpt_uuid_ms_ldm_metadata, G_PART_ALIAS_MS_LDM_METADATA, 0 }, 262 { &gpt_uuid_ms_recovery, G_PART_ALIAS_MS_RECOVERY, 0 }, 263 { &gpt_uuid_ms_reserved, G_PART_ALIAS_MS_RESERVED, 0 }, 264 { &gpt_uuid_ms_spaces, G_PART_ALIAS_MS_SPACES, 0 }, 265 { &gpt_uuid_netbsd_ccd, G_PART_ALIAS_NETBSD_CCD, 0 }, 266 { &gpt_uuid_netbsd_cgd, G_PART_ALIAS_NETBSD_CGD, 0 }, 267 { &gpt_uuid_netbsd_ffs, G_PART_ALIAS_NETBSD_FFS, 0 }, 268 { &gpt_uuid_netbsd_lfs, G_PART_ALIAS_NETBSD_LFS, 0 }, 269 { &gpt_uuid_netbsd_raid, G_PART_ALIAS_NETBSD_RAID, 0 }, 270 { &gpt_uuid_netbsd_swap, G_PART_ALIAS_NETBSD_SWAP, 0 }, 271 { &gpt_uuid_openbsd_data, G_PART_ALIAS_OPENBSD_DATA, 0 }, 272 { &gpt_uuid_prep_boot, G_PART_ALIAS_PREP_BOOT, 0x41 }, 273 { &gpt_uuid_vmfs, G_PART_ALIAS_VMFS, 0 }, 274 { &gpt_uuid_vmkdiag, G_PART_ALIAS_VMKDIAG, 0 }, 275 { &gpt_uuid_vmreserved, G_PART_ALIAS_VMRESERVED, 0 }, 276 { &gpt_uuid_vmvsanhdr, G_PART_ALIAS_VMVSANHDR, 0 }, 277 { NULL, 0, 0 } 278}; 279 280static int 281gpt_write_mbr_entry(u_char *mbr, int idx, int typ, quad_t start, 282 quad_t end) 283{ 284 285 if (typ == 0 || start > UINT32_MAX || end > UINT32_MAX) 286 return (EINVAL); 287 288 mbr += DOSPARTOFF + idx * DOSPARTSIZE; 289 mbr[0] = 0; 290 if (start == 1) { 291 /* 292 * Treat the PMBR partition specially to maximize 293 * interoperability with BIOSes. 294 */ 295 mbr[1] = mbr[3] = 0; 296 mbr[2] = 2; 297 } else 298 mbr[1] = mbr[2] = mbr[3] = 0xff; 299 mbr[4] = typ; 300 mbr[5] = mbr[6] = mbr[7] = 0xff; 301 le32enc(mbr + 8, (uint32_t)start); 302 le32enc(mbr + 12, (uint32_t)(end - start + 1)); 303 return (0); 304} 305 306static int 307gpt_map_type(struct uuid *t) 308{ 309 struct g_part_uuid_alias *uap; 310 311 for (uap = &gpt_uuid_alias_match[0]; uap->uuid; uap++) { 312 if (EQUUID(t, uap->uuid)) 313 return (uap->mbrtype); 314 } 315 return (0); 316} 317 318static void 319gpt_create_pmbr(struct g_part_gpt_table *table, struct g_provider *pp) 320{ 321 322 bzero(table->mbr + DOSPARTOFF, DOSPARTSIZE * NDOSPART); 323 gpt_write_mbr_entry(table->mbr, 0, 0xee, 1, 324 MIN(pp->mediasize / pp->sectorsize - 1, UINT32_MAX)); 325 le16enc(table->mbr + DOSMAGICOFFSET, DOSMAGIC); 326} 327 328/* 329 * Under Boot Camp the PMBR partition (type 0xEE) doesn't cover the 330 * whole disk anymore. Rather, it covers the GPT table and the EFI 331 * system partition only. This way the HFS+ partition and any FAT 332 * partitions can be added to the MBR without creating an overlap. 333 */ 334static int 335gpt_is_bootcamp(struct g_part_gpt_table *table, const char *provname) 336{ 337 uint8_t *p; 338 339 p = table->mbr + DOSPARTOFF; 340 if (p[4] != 0xee || le32dec(p + 8) != 1) 341 return (0); 342 343 p += DOSPARTSIZE; 344 if (p[4] != 0xaf) 345 return (0); 346 347 printf("GEOM: %s: enabling Boot Camp\n", provname); 348 return (1); 349} 350 351static void 352gpt_update_bootcamp(struct g_part_table *basetable, struct g_provider *pp) 353{ 354 struct g_part_entry *baseentry; 355 struct g_part_gpt_entry *entry; 356 struct g_part_gpt_table *table; 357 int bootable, error, index, slices, typ; 358 359 table = (struct g_part_gpt_table *)basetable; 360 361 bootable = -1; 362 for (index = 0; index < NDOSPART; index++) { 363 if (table->mbr[DOSPARTOFF + DOSPARTSIZE * index]) 364 bootable = index; 365 } 366 367 bzero(table->mbr + DOSPARTOFF, DOSPARTSIZE * NDOSPART); 368 slices = 0; 369 LIST_FOREACH(baseentry, &basetable->gpt_entry, gpe_entry) { 370 if (baseentry->gpe_deleted) 371 continue; 372 index = baseentry->gpe_index - 1; 373 if (index >= NDOSPART) 374 continue; 375 376 entry = (struct g_part_gpt_entry *)baseentry; 377 378 switch (index) { 379 case 0: /* This must be the EFI system partition. */ 380 if (!EQUUID(&entry->ent.ent_type, &gpt_uuid_efi)) 381 goto disable; 382 error = gpt_write_mbr_entry(table->mbr, index, 0xee, 383 1ull, entry->ent.ent_lba_end); 384 break; 385 case 1: /* This must be the HFS+ partition. */ 386 if (!EQUUID(&entry->ent.ent_type, &gpt_uuid_apple_hfs)) 387 goto disable; 388 error = gpt_write_mbr_entry(table->mbr, index, 0xaf, 389 entry->ent.ent_lba_start, entry->ent.ent_lba_end); 390 break; 391 default: 392 typ = gpt_map_type(&entry->ent.ent_type); 393 error = gpt_write_mbr_entry(table->mbr, index, typ, 394 entry->ent.ent_lba_start, entry->ent.ent_lba_end); 395 break; 396 } 397 if (error) 398 continue; 399 400 if (index == bootable) 401 table->mbr[DOSPARTOFF + DOSPARTSIZE * index] = 0x80; 402 slices |= 1 << index; 403 } 404 if ((slices & 3) == 3) 405 return; 406 407 disable: 408 table->bootcamp = 0; 409 gpt_create_pmbr(table, pp); 410} 411 412static struct gpt_hdr * 413gpt_read_hdr(struct g_part_gpt_table *table, struct g_consumer *cp, 414 enum gpt_elt elt) 415{ 416 struct gpt_hdr *buf, *hdr; 417 struct g_provider *pp; 418 quad_t lba, last; 419 int error; 420 uint32_t crc, sz; 421 422 pp = cp->provider; 423 last = (pp->mediasize / pp->sectorsize) - 1; 424 table->state[elt] = GPT_STATE_MISSING; 425 /* 426 * If the primary header is valid look for secondary 427 * header in AlternateLBA, otherwise in the last medium's LBA. 428 */ 429 if (elt == GPT_ELT_SECHDR) { 430 if (table->state[GPT_ELT_PRIHDR] != GPT_STATE_OK) 431 table->lba[elt] = last; 432 } else 433 table->lba[elt] = 1; 434 buf = g_read_data(cp, table->lba[elt] * pp->sectorsize, pp->sectorsize, 435 &error); 436 if (buf == NULL) 437 return (NULL); 438 hdr = NULL; 439 if (memcmp(buf->hdr_sig, GPT_HDR_SIG, sizeof(buf->hdr_sig)) != 0) 440 goto fail; 441 442 table->state[elt] = GPT_STATE_CORRUPT; 443 sz = le32toh(buf->hdr_size); 444 if (sz < 92 || sz > pp->sectorsize) 445 goto fail; 446 447 hdr = g_malloc(sz, M_WAITOK | M_ZERO); 448 bcopy(buf, hdr, sz); 449 hdr->hdr_size = sz; 450 451 crc = le32toh(buf->hdr_crc_self); 452 buf->hdr_crc_self = 0; 453 if (crc32(buf, sz) != crc) 454 goto fail; 455 hdr->hdr_crc_self = crc; 456 457 table->state[elt] = GPT_STATE_INVALID; 458 hdr->hdr_revision = le32toh(buf->hdr_revision); 459 if (hdr->hdr_revision < GPT_HDR_REVISION) 460 goto fail; 461 hdr->hdr_lba_self = le64toh(buf->hdr_lba_self); 462 if (hdr->hdr_lba_self != table->lba[elt]) 463 goto fail; 464 hdr->hdr_lba_alt = le64toh(buf->hdr_lba_alt); 465 if (hdr->hdr_lba_alt == hdr->hdr_lba_self) 466 goto fail; 467 if (hdr->hdr_lba_alt > last && geom_part_check_integrity) 468 goto fail; 469 470 /* Check the managed area. */ 471 hdr->hdr_lba_start = le64toh(buf->hdr_lba_start); 472 if (hdr->hdr_lba_start < 2 || hdr->hdr_lba_start >= last) 473 goto fail; 474 hdr->hdr_lba_end = le64toh(buf->hdr_lba_end); 475 if (hdr->hdr_lba_end < hdr->hdr_lba_start || hdr->hdr_lba_end >= last) 476 goto fail; 477 478 /* Check the table location and size of the table. */ 479 hdr->hdr_entries = le32toh(buf->hdr_entries); 480 hdr->hdr_entsz = le32toh(buf->hdr_entsz); 481 if (hdr->hdr_entries == 0 || hdr->hdr_entsz < 128 || 482 (hdr->hdr_entsz & 7) != 0) 483 goto fail; 484 hdr->hdr_lba_table = le64toh(buf->hdr_lba_table); 485 if (hdr->hdr_lba_table < 2 || hdr->hdr_lba_table >= last) 486 goto fail; 487 if (hdr->hdr_lba_table >= hdr->hdr_lba_start && 488 hdr->hdr_lba_table <= hdr->hdr_lba_end) 489 goto fail; 490 lba = hdr->hdr_lba_table + 491 howmany(hdr->hdr_entries * hdr->hdr_entsz, pp->sectorsize) - 1; 492 if (lba >= last) 493 goto fail; 494 if (lba >= hdr->hdr_lba_start && lba <= hdr->hdr_lba_end) 495 goto fail; 496 497 table->state[elt] = GPT_STATE_OK; 498 le_uuid_dec(&buf->hdr_uuid, &hdr->hdr_uuid); 499 hdr->hdr_crc_table = le32toh(buf->hdr_crc_table); 500 501 /* save LBA for secondary header */ 502 if (elt == GPT_ELT_PRIHDR) 503 table->lba[GPT_ELT_SECHDR] = hdr->hdr_lba_alt; 504 505 g_free(buf); 506 return (hdr); 507 508 fail: 509 if (hdr != NULL) 510 g_free(hdr); 511 g_free(buf); 512 return (NULL); 513} 514 515static struct gpt_ent * 516gpt_read_tbl(struct g_part_gpt_table *table, struct g_consumer *cp, 517 enum gpt_elt elt, struct gpt_hdr *hdr) 518{ 519 struct g_provider *pp; 520 struct gpt_ent *ent, *tbl; 521 char *buf, *p; 522 unsigned int idx, sectors, tblsz, size; 523 int error; 524 525 if (hdr == NULL) 526 return (NULL); 527 528 pp = cp->provider; 529 table->lba[elt] = hdr->hdr_lba_table; 530 531 table->state[elt] = GPT_STATE_MISSING; 532 tblsz = hdr->hdr_entries * hdr->hdr_entsz; 533 sectors = howmany(tblsz, pp->sectorsize); 534 buf = g_malloc(sectors * pp->sectorsize, M_WAITOK | M_ZERO); 535 for (idx = 0; idx < sectors; idx += MAXPHYS / pp->sectorsize) { 536 size = (sectors - idx > MAXPHYS / pp->sectorsize) ? MAXPHYS: 537 (sectors - idx) * pp->sectorsize; 538 p = g_read_data(cp, (table->lba[elt] + idx) * pp->sectorsize, 539 size, &error); 540 if (p == NULL) { 541 g_free(buf); 542 return (NULL); 543 } 544 bcopy(p, buf + idx * pp->sectorsize, size); 545 g_free(p); 546 } 547 table->state[elt] = GPT_STATE_CORRUPT; 548 if (crc32(buf, tblsz) != hdr->hdr_crc_table) { 549 g_free(buf); 550 return (NULL); 551 } 552 553 table->state[elt] = GPT_STATE_OK; 554 tbl = g_malloc(hdr->hdr_entries * sizeof(struct gpt_ent), 555 M_WAITOK | M_ZERO); 556 557 for (idx = 0, ent = tbl, p = buf; 558 idx < hdr->hdr_entries; 559 idx++, ent++, p += hdr->hdr_entsz) { 560 le_uuid_dec(p, &ent->ent_type); 561 le_uuid_dec(p + 16, &ent->ent_uuid); 562 ent->ent_lba_start = le64dec(p + 32); 563 ent->ent_lba_end = le64dec(p + 40); 564 ent->ent_attr = le64dec(p + 48); 565 /* Keep UTF-16 in little-endian. */ 566 bcopy(p + 56, ent->ent_name, sizeof(ent->ent_name)); 567 } 568 569 g_free(buf); 570 return (tbl); 571} 572 573static int 574gpt_matched_hdrs(struct gpt_hdr *pri, struct gpt_hdr *sec) 575{ 576 577 if (pri == NULL || sec == NULL) 578 return (0); 579 580 if (!EQUUID(&pri->hdr_uuid, &sec->hdr_uuid)) 581 return (0); 582 return ((pri->hdr_revision == sec->hdr_revision && 583 pri->hdr_size == sec->hdr_size && 584 pri->hdr_lba_start == sec->hdr_lba_start && 585 pri->hdr_lba_end == sec->hdr_lba_end && 586 pri->hdr_entries == sec->hdr_entries && 587 pri->hdr_entsz == sec->hdr_entsz && 588 pri->hdr_crc_table == sec->hdr_crc_table) ? 1 : 0); 589} 590 591static int 592gpt_parse_type(const char *type, struct uuid *uuid) 593{ 594 struct uuid tmp; 595 const char *alias; 596 int error; 597 struct g_part_uuid_alias *uap; 598 599 if (type[0] == '!') { 600 error = parse_uuid(type + 1, &tmp); 601 if (error) 602 return (error); 603 if (EQUUID(&tmp, &gpt_uuid_unused)) 604 return (EINVAL); 605 *uuid = tmp; 606 return (0); 607 } 608 for (uap = &gpt_uuid_alias_match[0]; uap->uuid; uap++) { 609 alias = g_part_alias_name(uap->alias); 610 if (!strcasecmp(type, alias)) { 611 *uuid = *uap->uuid; 612 return (0); 613 } 614 } 615 return (EINVAL); 616} 617 618static int 619g_part_gpt_add(struct g_part_table *basetable, struct g_part_entry *baseentry, 620 struct g_part_parms *gpp) 621{ 622 struct g_part_gpt_entry *entry; 623 int error; 624 625 entry = (struct g_part_gpt_entry *)baseentry; 626 error = gpt_parse_type(gpp->gpp_type, &entry->ent.ent_type); 627 if (error) 628 return (error); 629 kern_uuidgen(&entry->ent.ent_uuid, 1); 630 entry->ent.ent_lba_start = baseentry->gpe_start; 631 entry->ent.ent_lba_end = baseentry->gpe_end; 632 if (baseentry->gpe_deleted) { 633 entry->ent.ent_attr = 0; 634 bzero(entry->ent.ent_name, sizeof(entry->ent.ent_name)); 635 } 636 if (gpp->gpp_parms & G_PART_PARM_LABEL) 637 g_gpt_utf8_to_utf16(gpp->gpp_label, entry->ent.ent_name, 638 sizeof(entry->ent.ent_name) / 639 sizeof(entry->ent.ent_name[0])); 640 return (0); 641} 642 643static int 644g_part_gpt_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp) 645{ 646 struct g_part_gpt_table *table; 647 size_t codesz; 648 649 codesz = DOSPARTOFF; 650 table = (struct g_part_gpt_table *)basetable; 651 bzero(table->mbr, codesz); 652 codesz = MIN(codesz, gpp->gpp_codesize); 653 if (codesz > 0) 654 bcopy(gpp->gpp_codeptr, table->mbr, codesz); 655 return (0); 656} 657 658static int 659g_part_gpt_create(struct g_part_table *basetable, struct g_part_parms *gpp) 660{ 661 struct g_provider *pp; 662 struct g_part_gpt_table *table; 663 size_t tblsz; 664 665 /* Our depth should be 0 unless nesting was explicitly enabled. */ 666 if (!allow_nesting && basetable->gpt_depth != 0) 667 return (ENXIO); 668 669 table = (struct g_part_gpt_table *)basetable; 670 pp = gpp->gpp_provider; 671 tblsz = howmany(basetable->gpt_entries * sizeof(struct gpt_ent), 672 pp->sectorsize); 673 if (pp->sectorsize < MBRSIZE || 674 pp->mediasize < (3 + 2 * tblsz + basetable->gpt_entries) * 675 pp->sectorsize) 676 return (ENOSPC); 677 678 gpt_create_pmbr(table, pp); 679 680 /* Allocate space for the header */ 681 table->hdr = g_malloc(sizeof(struct gpt_hdr), M_WAITOK | M_ZERO); 682 683 bcopy(GPT_HDR_SIG, table->hdr->hdr_sig, sizeof(table->hdr->hdr_sig)); 684 table->hdr->hdr_revision = GPT_HDR_REVISION; 685 table->hdr->hdr_size = offsetof(struct gpt_hdr, padding); 686 kern_uuidgen(&table->hdr->hdr_uuid, 1); 687 table->hdr->hdr_entries = basetable->gpt_entries; 688 table->hdr->hdr_entsz = sizeof(struct gpt_ent); 689 690 g_gpt_set_defaults(basetable, pp); 691 return (0); 692} 693 694static int 695g_part_gpt_destroy(struct g_part_table *basetable, struct g_part_parms *gpp) 696{ 697 struct g_part_gpt_table *table; 698 struct g_provider *pp; 699 700 table = (struct g_part_gpt_table *)basetable; 701 pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider; 702 g_free(table->hdr); 703 table->hdr = NULL; 704 705 /* 706 * Wipe the first 2 sectors and last one to clear the partitioning. 707 * Wipe sectors only if they have valid metadata. 708 */ 709 if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK) 710 basetable->gpt_smhead |= 3; 711 if (table->state[GPT_ELT_SECHDR] == GPT_STATE_OK && 712 table->lba[GPT_ELT_SECHDR] == pp->mediasize / pp->sectorsize - 1) 713 basetable->gpt_smtail |= 1; 714 return (0); 715} 716 717static void 718g_part_gpt_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry, 719 struct sbuf *sb, const char *indent) 720{ 721 struct g_part_gpt_entry *entry; 722 723 entry = (struct g_part_gpt_entry *)baseentry; 724 if (indent == NULL) { 725 /* conftxt: libdisk compatibility */ 726 sbuf_cat(sb, " xs GPT xt "); 727 sbuf_printf_uuid(sb, &entry->ent.ent_type); 728 } else if (entry != NULL) { 729 /* confxml: partition entry information */ 730 sbuf_printf(sb, "%s<label>", indent); 731 g_gpt_printf_utf16(sb, entry->ent.ent_name, 732 sizeof(entry->ent.ent_name) >> 1); 733 sbuf_cat(sb, "</label>\n"); 734 if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTME) 735 sbuf_printf(sb, "%s<attrib>bootme</attrib>\n", indent); 736 if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTONCE) { 737 sbuf_printf(sb, "%s<attrib>bootonce</attrib>\n", 738 indent); 739 } 740 if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTFAILED) { 741 sbuf_printf(sb, "%s<attrib>bootfailed</attrib>\n", 742 indent); 743 } 744 sbuf_printf(sb, "%s<rawtype>", indent); 745 sbuf_printf_uuid(sb, &entry->ent.ent_type); 746 sbuf_cat(sb, "</rawtype>\n"); 747 sbuf_printf(sb, "%s<rawuuid>", indent); 748 sbuf_printf_uuid(sb, &entry->ent.ent_uuid); 749 sbuf_cat(sb, "</rawuuid>\n"); 750 sbuf_printf(sb, "%s<efimedia>", indent); 751 sbuf_printf(sb, "HD(%d,GPT,", entry->base.gpe_index); 752 sbuf_printf_uuid(sb, &entry->ent.ent_uuid); 753 sbuf_printf(sb, ",%#jx,%#jx)", (intmax_t)entry->base.gpe_start, 754 (intmax_t)(entry->base.gpe_end - entry->base.gpe_start + 1)); 755 sbuf_cat(sb, "</efimedia>\n"); 756 } else { 757 /* confxml: scheme information */ 758 } 759} 760 761static int 762g_part_gpt_dumpto(struct g_part_table *table, struct g_part_entry *baseentry) 763{ 764 struct g_part_gpt_entry *entry; 765 766 entry = (struct g_part_gpt_entry *)baseentry; 767 return ((EQUUID(&entry->ent.ent_type, &gpt_uuid_freebsd_swap) || 768 EQUUID(&entry->ent.ent_type, &gpt_uuid_linux_swap) || 769 EQUUID(&entry->ent.ent_type, &gpt_uuid_dfbsd_swap)) ? 1 : 0); 770} 771 772static int 773g_part_gpt_modify(struct g_part_table *basetable, 774 struct g_part_entry *baseentry, struct g_part_parms *gpp) 775{ 776 struct g_part_gpt_entry *entry; 777 int error; 778 779 entry = (struct g_part_gpt_entry *)baseentry; 780 if (gpp->gpp_parms & G_PART_PARM_TYPE) { 781 error = gpt_parse_type(gpp->gpp_type, &entry->ent.ent_type); 782 if (error) 783 return (error); 784 } 785 if (gpp->gpp_parms & G_PART_PARM_LABEL) 786 g_gpt_utf8_to_utf16(gpp->gpp_label, entry->ent.ent_name, 787 sizeof(entry->ent.ent_name) / 788 sizeof(entry->ent.ent_name[0])); 789 return (0); 790} 791 792static int 793g_part_gpt_resize(struct g_part_table *basetable, 794 struct g_part_entry *baseentry, struct g_part_parms *gpp) 795{ 796 struct g_part_gpt_entry *entry; 797 798 if (baseentry == NULL) 799 return (g_part_gpt_recover(basetable)); 800 801 entry = (struct g_part_gpt_entry *)baseentry; 802 baseentry->gpe_end = baseentry->gpe_start + gpp->gpp_size - 1; 803 entry->ent.ent_lba_end = baseentry->gpe_end; 804 805 return (0); 806} 807 808static const char * 809g_part_gpt_name(struct g_part_table *table, struct g_part_entry *baseentry, 810 char *buf, size_t bufsz) 811{ 812 struct g_part_gpt_entry *entry; 813 char c; 814 815 entry = (struct g_part_gpt_entry *)baseentry; 816 c = (EQUUID(&entry->ent.ent_type, &gpt_uuid_freebsd)) ? 's' : 'p'; 817 snprintf(buf, bufsz, "%c%d", c, baseentry->gpe_index); 818 return (buf); 819} 820 821static int 822g_part_gpt_probe(struct g_part_table *table, struct g_consumer *cp) 823{ 824 struct g_provider *pp; 825 u_char *buf; 826 int error, index, pri, res; 827 828 /* Our depth should be 0 unless nesting was explicitly enabled. */ 829 if (!allow_nesting && table->gpt_depth != 0) 830 return (ENXIO); 831 832 pp = cp->provider; 833 834 /* 835 * Sanity-check the provider. Since the first sector on the provider 836 * must be a PMBR and a PMBR is 512 bytes large, the sector size 837 * must be at least 512 bytes. Also, since the theoretical minimum 838 * number of sectors needed by GPT is 6, any medium that has less 839 * than 6 sectors is never going to be able to hold a GPT. The 840 * number 6 comes from: 841 * 1 sector for the PMBR 842 * 2 sectors for the GPT headers (each 1 sector) 843 * 2 sectors for the GPT tables (each 1 sector) 844 * 1 sector for an actual partition 845 * It's better to catch this pathological case early than behaving 846 * pathologically later on... 847 */ 848 if (pp->sectorsize < MBRSIZE || pp->mediasize < 6 * pp->sectorsize) 849 return (ENOSPC); 850 851 /* 852 * Check that there's a MBR or a PMBR. If it's a PMBR, we return 853 * as the highest priority on a match, otherwise we assume some 854 * GPT-unaware tool has destroyed the GPT by recreating a MBR and 855 * we really want the MBR scheme to take precedence. 856 */ 857 buf = g_read_data(cp, 0L, pp->sectorsize, &error); 858 if (buf == NULL) 859 return (error); 860 res = le16dec(buf + DOSMAGICOFFSET); 861 pri = G_PART_PROBE_PRI_LOW; 862 if (res == DOSMAGIC) { 863 for (index = 0; index < NDOSPART; index++) { 864 if (buf[DOSPARTOFF + DOSPARTSIZE * index + 4] == 0xee) 865 pri = G_PART_PROBE_PRI_HIGH; 866 } 867 g_free(buf); 868 869 /* Check that there's a primary header. */ 870 buf = g_read_data(cp, pp->sectorsize, pp->sectorsize, &error); 871 if (buf == NULL) 872 return (error); 873 res = memcmp(buf, GPT_HDR_SIG, 8); 874 g_free(buf); 875 if (res == 0) 876 return (pri); 877 } else 878 g_free(buf); 879 880 /* No primary? Check that there's a secondary. */ 881 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 882 &error); 883 if (buf == NULL) 884 return (error); 885 res = memcmp(buf, GPT_HDR_SIG, 8); 886 g_free(buf); 887 return ((res == 0) ? pri : ENXIO); 888} 889 890static int 891g_part_gpt_read(struct g_part_table *basetable, struct g_consumer *cp) 892{ 893 struct gpt_hdr *prihdr, *sechdr; 894 struct gpt_ent *tbl, *pritbl, *sectbl; 895 struct g_provider *pp; 896 struct g_part_gpt_table *table; 897 struct g_part_gpt_entry *entry; 898 u_char *buf; 899 uint64_t last; 900 int error, index; 901 902 table = (struct g_part_gpt_table *)basetable; 903 pp = cp->provider; 904 last = (pp->mediasize / pp->sectorsize) - 1; 905 906 /* Read the PMBR */ 907 buf = g_read_data(cp, 0, pp->sectorsize, &error); 908 if (buf == NULL) 909 return (error); 910 bcopy(buf, table->mbr, MBRSIZE); 911 g_free(buf); 912 913 /* Read the primary header and table. */ 914 prihdr = gpt_read_hdr(table, cp, GPT_ELT_PRIHDR); 915 if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK) { 916 pritbl = gpt_read_tbl(table, cp, GPT_ELT_PRITBL, prihdr); 917 } else { 918 table->state[GPT_ELT_PRITBL] = GPT_STATE_MISSING; 919 pritbl = NULL; 920 } 921 922 /* Read the secondary header and table. */ 923 sechdr = gpt_read_hdr(table, cp, GPT_ELT_SECHDR); 924 if (table->state[GPT_ELT_SECHDR] == GPT_STATE_OK) { 925 sectbl = gpt_read_tbl(table, cp, GPT_ELT_SECTBL, sechdr); 926 } else { 927 table->state[GPT_ELT_SECTBL] = GPT_STATE_MISSING; 928 sectbl = NULL; 929 } 930 931 /* Fail if we haven't got any good tables at all. */ 932 if (table->state[GPT_ELT_PRITBL] != GPT_STATE_OK && 933 table->state[GPT_ELT_SECTBL] != GPT_STATE_OK) { 934 printf("GEOM: %s: corrupt or invalid GPT detected.\n", 935 pp->name); 936 printf("GEOM: %s: GPT rejected -- may not be recoverable.\n", 937 pp->name); 938 if (prihdr != NULL) 939 g_free(prihdr); 940 if (pritbl != NULL) 941 g_free(pritbl); 942 if (sechdr != NULL) 943 g_free(sechdr); 944 if (sectbl != NULL) 945 g_free(sectbl); 946 return (EINVAL); 947 } 948 949 /* 950 * If both headers are good but they disagree with each other, 951 * then invalidate one. We prefer to keep the primary header, 952 * unless the primary table is corrupt. 953 */ 954 if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK && 955 table->state[GPT_ELT_SECHDR] == GPT_STATE_OK && 956 !gpt_matched_hdrs(prihdr, sechdr)) { 957 if (table->state[GPT_ELT_PRITBL] == GPT_STATE_OK) { 958 table->state[GPT_ELT_SECHDR] = GPT_STATE_INVALID; 959 table->state[GPT_ELT_SECTBL] = GPT_STATE_MISSING; 960 g_free(sechdr); 961 sechdr = NULL; 962 } else { 963 table->state[GPT_ELT_PRIHDR] = GPT_STATE_INVALID; 964 table->state[GPT_ELT_PRITBL] = GPT_STATE_MISSING; 965 g_free(prihdr); 966 prihdr = NULL; 967 } 968 } 969 970 if (table->state[GPT_ELT_PRITBL] != GPT_STATE_OK) { 971 printf("GEOM: %s: the primary GPT table is corrupt or " 972 "invalid.\n", pp->name); 973 printf("GEOM: %s: using the secondary instead -- recovery " 974 "strongly advised.\n", pp->name); 975 table->hdr = sechdr; 976 basetable->gpt_corrupt = 1; 977 if (prihdr != NULL) 978 g_free(prihdr); 979 tbl = sectbl; 980 if (pritbl != NULL) 981 g_free(pritbl); 982 } else { 983 if (table->state[GPT_ELT_SECTBL] != GPT_STATE_OK) { 984 printf("GEOM: %s: the secondary GPT table is corrupt " 985 "or invalid.\n", pp->name); 986 printf("GEOM: %s: using the primary only -- recovery " 987 "suggested.\n", pp->name); 988 basetable->gpt_corrupt = 1; 989 } else if (table->lba[GPT_ELT_SECHDR] != last) { 990 printf( "GEOM: %s: the secondary GPT header is not in " 991 "the last LBA.\n", pp->name); 992 basetable->gpt_corrupt = 1; 993 } 994 table->hdr = prihdr; 995 if (sechdr != NULL) 996 g_free(sechdr); 997 tbl = pritbl; 998 if (sectbl != NULL) 999 g_free(sectbl); 1000 } 1001 1002 basetable->gpt_first = table->hdr->hdr_lba_start; 1003 basetable->gpt_last = table->hdr->hdr_lba_end; 1004 basetable->gpt_entries = table->hdr->hdr_entries; 1005 1006 for (index = basetable->gpt_entries - 1; index >= 0; index--) { 1007 if (EQUUID(&tbl[index].ent_type, &gpt_uuid_unused)) 1008 continue; 1009 entry = (struct g_part_gpt_entry *)g_part_new_entry( 1010 basetable, index + 1, tbl[index].ent_lba_start, 1011 tbl[index].ent_lba_end); 1012 entry->ent = tbl[index]; 1013 } 1014 1015 g_free(tbl); 1016 1017 /* 1018 * Under Mac OS X, the MBR mirrors the first 4 GPT partitions 1019 * if (and only if) any FAT32 or FAT16 partitions have been 1020 * created. This happens irrespective of whether Boot Camp is 1021 * used/enabled, though it's generally understood to be done 1022 * to support legacy Windows under Boot Camp. We refer to this 1023 * mirroring simply as Boot Camp. We try to detect Boot Camp 1024 * so that we can update the MBR if and when GPT changes have 1025 * been made. Note that we do not enable Boot Camp if not 1026 * previously enabled because we can't assume that we're on a 1027 * Mac alongside Mac OS X. 1028 */ 1029 table->bootcamp = gpt_is_bootcamp(table, pp->name); 1030 1031 return (0); 1032} 1033 1034static int 1035g_part_gpt_recover(struct g_part_table *basetable) 1036{ 1037 struct g_part_gpt_table *table; 1038 struct g_provider *pp; 1039 1040 table = (struct g_part_gpt_table *)basetable; 1041 pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider; 1042 gpt_create_pmbr(table, pp); 1043 g_gpt_set_defaults(basetable, pp); 1044 basetable->gpt_corrupt = 0; 1045 return (0); 1046} 1047 1048static int 1049g_part_gpt_setunset(struct g_part_table *basetable, 1050 struct g_part_entry *baseentry, const char *attrib, unsigned int set) 1051{ 1052 struct g_part_gpt_entry *entry; 1053 struct g_part_gpt_table *table; 1054 struct g_provider *pp; 1055 uint8_t *p; 1056 uint64_t attr; 1057 int i; 1058 1059 table = (struct g_part_gpt_table *)basetable; 1060 entry = (struct g_part_gpt_entry *)baseentry; 1061 1062 if (strcasecmp(attrib, "active") == 0) { 1063 if (table->bootcamp) { 1064 /* The active flag must be set on a valid entry. */ 1065 if (entry == NULL) 1066 return (ENXIO); 1067 if (baseentry->gpe_index > NDOSPART) 1068 return (EINVAL); 1069 for (i = 0; i < NDOSPART; i++) { 1070 p = &table->mbr[DOSPARTOFF + i * DOSPARTSIZE]; 1071 p[0] = (i == baseentry->gpe_index - 1) 1072 ? ((set) ? 0x80 : 0) : 0; 1073 } 1074 } else { 1075 /* The PMBR is marked as active without an entry. */ 1076 if (entry != NULL) 1077 return (ENXIO); 1078 for (i = 0; i < NDOSPART; i++) { 1079 p = &table->mbr[DOSPARTOFF + i * DOSPARTSIZE]; 1080 p[0] = (p[4] == 0xee) ? ((set) ? 0x80 : 0) : 0; 1081 } 1082 } 1083 return (0); 1084 } else if (strcasecmp(attrib, "lenovofix") == 0) { 1085 /* 1086 * Write the 0xee GPT entry to slot #1 (2nd slot) in the pMBR. 1087 * This workaround allows Lenovo X220, T420, T520, etc to boot 1088 * from GPT Partitions in BIOS mode. 1089 */ 1090 1091 if (entry != NULL) 1092 return (ENXIO); 1093 1094 pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider; 1095 bzero(table->mbr + DOSPARTOFF, DOSPARTSIZE * NDOSPART); 1096 gpt_write_mbr_entry(table->mbr, ((set) ? 1 : 0), 0xee, 1, 1097 MIN(pp->mediasize / pp->sectorsize - 1, UINT32_MAX)); 1098 return (0); 1099 } 1100 1101 if (entry == NULL) 1102 return (ENODEV); 1103 1104 attr = 0; 1105 if (strcasecmp(attrib, "bootme") == 0) { 1106 attr |= GPT_ENT_ATTR_BOOTME; 1107 } else if (strcasecmp(attrib, "bootonce") == 0) { 1108 attr |= GPT_ENT_ATTR_BOOTONCE; 1109 if (set) 1110 attr |= GPT_ENT_ATTR_BOOTME; 1111 } else if (strcasecmp(attrib, "bootfailed") == 0) { 1112 /* 1113 * It should only be possible to unset BOOTFAILED, but it might 1114 * be useful for test purposes to also be able to set it. 1115 */ 1116 attr |= GPT_ENT_ATTR_BOOTFAILED; 1117 } 1118 if (attr == 0) 1119 return (EINVAL); 1120 1121 if (set) 1122 attr = entry->ent.ent_attr | attr; 1123 else 1124 attr = entry->ent.ent_attr & ~attr; 1125 if (attr != entry->ent.ent_attr) { 1126 entry->ent.ent_attr = attr; 1127 if (!baseentry->gpe_created) 1128 baseentry->gpe_modified = 1; 1129 } 1130 return (0); 1131} 1132 1133static const char * 1134g_part_gpt_type(struct g_part_table *basetable, struct g_part_entry *baseentry, 1135 char *buf, size_t bufsz) 1136{ 1137 struct g_part_gpt_entry *entry; 1138 struct uuid *type; 1139 struct g_part_uuid_alias *uap; 1140 1141 entry = (struct g_part_gpt_entry *)baseentry; 1142 type = &entry->ent.ent_type; 1143 for (uap = &gpt_uuid_alias_match[0]; uap->uuid; uap++) 1144 if (EQUUID(type, uap->uuid)) 1145 return (g_part_alias_name(uap->alias)); 1146 buf[0] = '!'; 1147 snprintf_uuid(buf + 1, bufsz - 1, type); 1148 1149 return (buf); 1150} 1151 1152static int 1153g_part_gpt_write(struct g_part_table *basetable, struct g_consumer *cp) 1154{ 1155 unsigned char *buf, *bp; 1156 struct g_provider *pp; 1157 struct g_part_entry *baseentry; 1158 struct g_part_gpt_entry *entry; 1159 struct g_part_gpt_table *table; 1160 size_t tblsz; 1161 uint32_t crc; 1162 int error, index; 1163 1164 pp = cp->provider; 1165 table = (struct g_part_gpt_table *)basetable; 1166 tblsz = howmany(table->hdr->hdr_entries * table->hdr->hdr_entsz, 1167 pp->sectorsize); 1168 1169 /* Reconstruct the MBR from the GPT if under Boot Camp. */ 1170 if (table->bootcamp) 1171 gpt_update_bootcamp(basetable, pp); 1172 1173 /* Write the PMBR */ 1174 buf = g_malloc(pp->sectorsize, M_WAITOK | M_ZERO); 1175 bcopy(table->mbr, buf, MBRSIZE); 1176 error = g_write_data(cp, 0, buf, pp->sectorsize); 1177 g_free(buf); 1178 if (error) 1179 return (error); 1180 1181 /* Allocate space for the header and entries. */ 1182 buf = g_malloc((tblsz + 1) * pp->sectorsize, M_WAITOK | M_ZERO); 1183 1184 memcpy(buf, table->hdr->hdr_sig, sizeof(table->hdr->hdr_sig)); 1185 le32enc(buf + 8, table->hdr->hdr_revision); 1186 le32enc(buf + 12, table->hdr->hdr_size); 1187 le64enc(buf + 40, table->hdr->hdr_lba_start); 1188 le64enc(buf + 48, table->hdr->hdr_lba_end); 1189 le_uuid_enc(buf + 56, &table->hdr->hdr_uuid); 1190 le32enc(buf + 80, table->hdr->hdr_entries); 1191 le32enc(buf + 84, table->hdr->hdr_entsz); 1192 1193 LIST_FOREACH(baseentry, &basetable->gpt_entry, gpe_entry) { 1194 if (baseentry->gpe_deleted) 1195 continue; 1196 entry = (struct g_part_gpt_entry *)baseentry; 1197 index = baseentry->gpe_index - 1; 1198 bp = buf + pp->sectorsize + table->hdr->hdr_entsz * index; 1199 le_uuid_enc(bp, &entry->ent.ent_type); 1200 le_uuid_enc(bp + 16, &entry->ent.ent_uuid); 1201 le64enc(bp + 32, entry->ent.ent_lba_start); 1202 le64enc(bp + 40, entry->ent.ent_lba_end); 1203 le64enc(bp + 48, entry->ent.ent_attr); 1204 memcpy(bp + 56, entry->ent.ent_name, 1205 sizeof(entry->ent.ent_name)); 1206 } 1207 1208 crc = crc32(buf + pp->sectorsize, 1209 table->hdr->hdr_entries * table->hdr->hdr_entsz); 1210 le32enc(buf + 88, crc); 1211 1212 /* Write primary meta-data. */ 1213 le32enc(buf + 16, 0); /* hdr_crc_self. */ 1214 le64enc(buf + 24, table->lba[GPT_ELT_PRIHDR]); /* hdr_lba_self. */ 1215 le64enc(buf + 32, table->lba[GPT_ELT_SECHDR]); /* hdr_lba_alt. */ 1216 le64enc(buf + 72, table->lba[GPT_ELT_PRITBL]); /* hdr_lba_table. */ 1217 crc = crc32(buf, table->hdr->hdr_size); 1218 le32enc(buf + 16, crc); 1219 1220 for (index = 0; index < tblsz; index += MAXPHYS / pp->sectorsize) { 1221 error = g_write_data(cp, 1222 (table->lba[GPT_ELT_PRITBL] + index) * pp->sectorsize, 1223 buf + (index + 1) * pp->sectorsize, 1224 (tblsz - index > MAXPHYS / pp->sectorsize) ? MAXPHYS: 1225 (tblsz - index) * pp->sectorsize); 1226 if (error) 1227 goto out; 1228 } 1229 error = g_write_data(cp, table->lba[GPT_ELT_PRIHDR] * pp->sectorsize, 1230 buf, pp->sectorsize); 1231 if (error) 1232 goto out; 1233 1234 /* Write secondary meta-data. */ 1235 le32enc(buf + 16, 0); /* hdr_crc_self. */ 1236 le64enc(buf + 24, table->lba[GPT_ELT_SECHDR]); /* hdr_lba_self. */ 1237 le64enc(buf + 32, table->lba[GPT_ELT_PRIHDR]); /* hdr_lba_alt. */ 1238 le64enc(buf + 72, table->lba[GPT_ELT_SECTBL]); /* hdr_lba_table. */ 1239 crc = crc32(buf, table->hdr->hdr_size); 1240 le32enc(buf + 16, crc); 1241 1242 for (index = 0; index < tblsz; index += MAXPHYS / pp->sectorsize) { 1243 error = g_write_data(cp, 1244 (table->lba[GPT_ELT_SECTBL] + index) * pp->sectorsize, 1245 buf + (index + 1) * pp->sectorsize, 1246 (tblsz - index > MAXPHYS / pp->sectorsize) ? MAXPHYS: 1247 (tblsz - index) * pp->sectorsize); 1248 if (error) 1249 goto out; 1250 } 1251 error = g_write_data(cp, table->lba[GPT_ELT_SECHDR] * pp->sectorsize, 1252 buf, pp->sectorsize); 1253 1254 out: 1255 g_free(buf); 1256 return (error); 1257} 1258 1259static void 1260g_gpt_set_defaults(struct g_part_table *basetable, struct g_provider *pp) 1261{ 1262 struct g_part_entry *baseentry; 1263 struct g_part_gpt_entry *entry; 1264 struct g_part_gpt_table *table; 1265 quad_t start, end, min, max; 1266 quad_t lba, last; 1267 size_t spb, tblsz; 1268 1269 table = (struct g_part_gpt_table *)basetable; 1270 last = pp->mediasize / pp->sectorsize - 1; 1271 tblsz = howmany(basetable->gpt_entries * sizeof(struct gpt_ent), 1272 pp->sectorsize); 1273 1274 table->lba[GPT_ELT_PRIHDR] = 1; 1275 table->lba[GPT_ELT_PRITBL] = 2; 1276 table->lba[GPT_ELT_SECHDR] = last; 1277 table->lba[GPT_ELT_SECTBL] = last - tblsz; 1278 table->state[GPT_ELT_PRIHDR] = GPT_STATE_OK; 1279 table->state[GPT_ELT_PRITBL] = GPT_STATE_OK; 1280 table->state[GPT_ELT_SECHDR] = GPT_STATE_OK; 1281 table->state[GPT_ELT_SECTBL] = GPT_STATE_OK; 1282 1283 max = start = 2 + tblsz; 1284 min = end = last - tblsz - 1; 1285 LIST_FOREACH(baseentry, &basetable->gpt_entry, gpe_entry) { 1286 if (baseentry->gpe_deleted) 1287 continue; 1288 entry = (struct g_part_gpt_entry *)baseentry; 1289 if (entry->ent.ent_lba_start < min) 1290 min = entry->ent.ent_lba_start; 1291 if (entry->ent.ent_lba_end > max) 1292 max = entry->ent.ent_lba_end; 1293 } 1294 spb = 4096 / pp->sectorsize; 1295 if (spb > 1) { 1296 lba = start + ((start % spb) ? spb - start % spb : 0); 1297 if (lba <= min) 1298 start = lba; 1299 lba = end - (end + 1) % spb; 1300 if (max <= lba) 1301 end = lba; 1302 } 1303 table->hdr->hdr_lba_start = start; 1304 table->hdr->hdr_lba_end = end; 1305 1306 basetable->gpt_first = start; 1307 basetable->gpt_last = end; 1308} 1309 1310static void 1311g_gpt_printf_utf16(struct sbuf *sb, uint16_t *str, size_t len) 1312{ 1313 u_int bo; 1314 uint32_t ch; 1315 uint16_t c; 1316 1317 bo = LITTLE_ENDIAN; /* GPT is little-endian */ 1318 while (len > 0 && *str != 0) { 1319 ch = (bo == BIG_ENDIAN) ? be16toh(*str) : le16toh(*str); 1320 str++, len--; 1321 if ((ch & 0xf800) == 0xd800) { 1322 if (len > 0) { 1323 c = (bo == BIG_ENDIAN) ? be16toh(*str) 1324 : le16toh(*str); 1325 str++, len--; 1326 } else 1327 c = 0xfffd; 1328 if ((ch & 0x400) == 0 && (c & 0xfc00) == 0xdc00) { 1329 ch = ((ch & 0x3ff) << 10) + (c & 0x3ff); 1330 ch += 0x10000; 1331 } else 1332 ch = 0xfffd; 1333 } else if (ch == 0xfffe) { /* BOM (U+FEFF) swapped. */ 1334 bo = (bo == BIG_ENDIAN) ? LITTLE_ENDIAN : BIG_ENDIAN; 1335 continue; 1336 } else if (ch == 0xfeff) /* BOM (U+FEFF) unswapped. */ 1337 continue; 1338 1339 /* Write the Unicode character in UTF-8 */ 1340 if (ch < 0x80) 1341 g_conf_printf_escaped(sb, "%c", ch); 1342 else if (ch < 0x800) 1343 g_conf_printf_escaped(sb, "%c%c", 0xc0 | (ch >> 6), 1344 0x80 | (ch & 0x3f)); 1345 else if (ch < 0x10000) 1346 g_conf_printf_escaped(sb, "%c%c%c", 0xe0 | (ch >> 12), 1347 0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f)); 1348 else if (ch < 0x200000) 1349 g_conf_printf_escaped(sb, "%c%c%c%c", 0xf0 | 1350 (ch >> 18), 0x80 | ((ch >> 12) & 0x3f), 1351 0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f)); 1352 } 1353} 1354 1355static void 1356g_gpt_utf8_to_utf16(const uint8_t *s8, uint16_t *s16, size_t s16len) 1357{ 1358 size_t s16idx, s8idx; 1359 uint32_t utfchar; 1360 unsigned int c, utfbytes; 1361 1362 s8idx = s16idx = 0; 1363 utfchar = 0; 1364 utfbytes = 0; 1365 bzero(s16, s16len << 1); 1366 while (s8[s8idx] != 0 && s16idx < s16len) { 1367 c = s8[s8idx++]; 1368 if ((c & 0xc0) != 0x80) { 1369 /* Initial characters. */ 1370 if (utfbytes != 0) { 1371 /* Incomplete encoding of previous char. */ 1372 s16[s16idx++] = htole16(0xfffd); 1373 } 1374 if ((c & 0xf8) == 0xf0) { 1375 utfchar = c & 0x07; 1376 utfbytes = 3; 1377 } else if ((c & 0xf0) == 0xe0) { 1378 utfchar = c & 0x0f; 1379 utfbytes = 2; 1380 } else if ((c & 0xe0) == 0xc0) { 1381 utfchar = c & 0x1f; 1382 utfbytes = 1; 1383 } else { 1384 utfchar = c & 0x7f; 1385 utfbytes = 0; 1386 } 1387 } else { 1388 /* Followup characters. */ 1389 if (utfbytes > 0) { 1390 utfchar = (utfchar << 6) + (c & 0x3f); 1391 utfbytes--; 1392 } else if (utfbytes == 0) 1393 utfbytes = ~0; 1394 } 1395 /* 1396 * Write the complete Unicode character as UTF-16 when we 1397 * have all the UTF-8 charactars collected. 1398 */ 1399 if (utfbytes == 0) { 1400 /* 1401 * If we need to write 2 UTF-16 characters, but 1402 * we only have room for 1, then we truncate the 1403 * string by writing a 0 instead. 1404 */ 1405 if (utfchar >= 0x10000 && s16idx < s16len - 1) { 1406 s16[s16idx++] = 1407 htole16(0xd800 | ((utfchar >> 10) - 0x40)); 1408 s16[s16idx++] = 1409 htole16(0xdc00 | (utfchar & 0x3ff)); 1410 } else 1411 s16[s16idx++] = (utfchar >= 0x10000) ? 0 : 1412 htole16(utfchar); 1413 } 1414 } 1415 /* 1416 * If our input string was truncated, append an invalid encoding 1417 * character to the output string. 1418 */ 1419 if (utfbytes != 0 && s16idx < s16len) 1420 s16[s16idx++] = htole16(0xfffd); 1421} 1422