lib/libefi/rdwr_efi.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <errno.h>
  30 #include <strings.h>
  31 #include <unistd.h>
  32 #include <uuid/uuid.h>
  33 #include <libintl.h>
  34 #include <sys/types.h>
  35 #include <sys/dkio.h>
  36 #include <sys/vtoc.h>
  37 #include <sys/mhd.h>
  38 #include <sys/param.h>
  39 #include <sys/dktp/fdisk.h>
  40 #include <sys/efi_partition.h>
  41 #include <sys/byteorder.h>
  42 #include <sys/ddi.h>
  43
  44 static struct uuid_to_ptag {
  45         struct uuid     uuid;
  46 } conversion_array[] = {
  47         { EFI_UNUSED },
  48         { EFI_BOOT },
  49         { EFI_ROOT },
  50         { EFI_SWAP },
  51         { EFI_USR },
  52         { EFI_BACKUP },
  53         { 0 },                  /* STAND is never used */
  54         { EFI_VAR },
  55         { EFI_HOME },
  56         { EFI_ALTSCTR },
  57         { 0 },                  /* CACHE (cachefs) is never used */
  58         { EFI_RESERVED },
  59         { EFI_SYSTEM },
  60         { EFI_LEGACY_MBR },
  61         { EFI_RESV3 },
  62         { EFI_RESV4 },
  63         { EFI_MSFT_RESV },
  64         { EFI_DELL_BASIC },
  65         { EFI_DELL_RAID },
  66         { EFI_DELL_SWAP },
  67         { EFI_DELL_LVM },
  68         { EFI_DELL_RESV },
  69         { EFI_AAPL_HFS },
  70         { EFI_AAPL_UFS }
  71 };
  72
  73 /*
  74  * Default vtoc information for non-SVr4 partitions
  75  */
  76 struct dk_map2  default_vtoc_map[NDKMAP] = {
  77         {       V_ROOT,         0       },              /* a - 0 */
  78         {       V_SWAP,         V_UNMNT },              /* b - 1 */
  79         {       V_BACKUP,       V_UNMNT },              /* c - 2 */
  80         {       V_UNASSIGNED,   0       },              /* d - 3 */
  81         {       V_UNASSIGNED,   0       },              /* e - 4 */
  82         {       V_UNASSIGNED,   0       },              /* f - 5 */
  83         {       V_USR,          0       },              /* g - 6 */
  84         {       V_UNASSIGNED,   0       },              /* h - 7 */
  85
  86 #if defined(_SUNOS_VTOC_16)
  87
  88 #if defined(i386) || defined(__amd64)
  89         {       V_BOOT,         V_UNMNT },              /* i - 8 */
  90         {       V_ALTSCTR,      0       },              /* j - 9 */
  91
  92 #else
  93 #error No VTOC format defined.
  94 #endif                  /* defined(i386) */
  95
  96         {       V_UNASSIGNED,   0       },              /* k - 10 */
  97         {       V_UNASSIGNED,   0       },              /* l - 11 */
  98         {       V_UNASSIGNED,   0       },              /* m - 12 */
  99         {       V_UNASSIGNED,   0       },              /* n - 13 */
 100         {       V_UNASSIGNED,   0       },              /* o - 14 */
 101         {       V_UNASSIGNED,   0       },              /* p - 15 */
 102 #endif                  /* defined(_SUNOS_VTOC_16) */
 103 };
 104
 105 #ifdef DEBUG
 106 int efi_debug = 1;
 107 #else
 108 int efi_debug = 0;
 109 #endif
 110
 111 extern unsigned int     efi_crc32(const unsigned char *, unsigned int);
 112 static int              efi_read(int, struct dk_gpt *);
 113
 114 static int
 115 read_disk_info(int fd, diskaddr_t *capacity, uint_t *lbsize)
 116 {
 117         struct dk_minfo         disk_info;
 118
 119         if ((ioctl(fd, DKIOCGMEDIAINFO, (caddr_t)&disk_info)) == -1)
 120                 return (errno);
 121         *capacity = disk_info.dki_capacity;
 122         *lbsize = disk_info.dki_lbsize;
 123         return (0);
 124 }
 125
 126 /*
 127  * the number of blocks the EFI label takes up (round up to nearest
 128  * block)
 129  */
 130 #define NBLOCKS(p, l)   (1 + ((((p) * (int)sizeof (efi_gpe_t))  + \
 131                                 ((l) - 1)) / (l)))
 132 /* number of partitions -- limited by what we can malloc */
 133 #define MAX_PARTS       ((4294967295UL - sizeof (struct dk_gpt)) / \
 134                             sizeof (struct dk_part))
 135
 136 int
 137 efi_alloc_and_init(int fd, uint32_t nparts, struct dk_gpt **vtoc)
 138 {
 139         diskaddr_t      capacity;
 140         uint_t          lbsize;
 141         uint_t          nblocks;
 142         size_t          length;
 143         struct dk_gpt   *vptr;
 144         struct uuid     uuid;
 145
 146         if (read_disk_info(fd, &capacity, &lbsize) != 0) {
 147                 if (efi_debug)
 148                         (void) fprintf(stderr,
 149                             "couldn't read disk information\n");
 150                 return (-1);
 151         }
 152
 153         nblocks = NBLOCKS(nparts, lbsize);
 154         if ((nblocks * lbsize) < EFI_MIN_ARRAY_SIZE + lbsize) {
 155                 /* 16K plus one block for the GPT */
 156                 nblocks = EFI_MIN_ARRAY_SIZE / lbsize + 1;
 157         }
 158
 159         if (nparts > MAX_PARTS) {
 160                 if (efi_debug) {
 161                         (void) fprintf(stderr,
 162                         "the maximum number of partitions supported is %lu\n",
 163                             MAX_PARTS);
 164                 }
 165                 return (-1);
 166         }
 167
 168         length = sizeof (struct dk_gpt) +
 169             sizeof (struct dk_part) * (nparts - 1);
 170
 171         if ((*vtoc = calloc(length, 1)) == NULL)
 172                 return (-1);
 173
 174         vptr = *vtoc;
 175
 176         vptr->efi_version = EFI_VERSION_CURRENT;
 177         vptr->efi_lbasize = lbsize;
 178         vptr->efi_nparts = nparts;
 179         /*
 180          * add one block here for the PMBR; on disks with a 512 byte
 181          * block size and 128 or fewer partitions, efi_first_u_lba
 182          * should work out to "34"
 183          */
 184         vptr->efi_first_u_lba = nblocks + 1;
 185         vptr->efi_last_lba = capacity - 1;
 186         vptr->efi_altern_lba = capacity -1;
 187         vptr->efi_last_u_lba = vptr->efi_last_lba - nblocks;
 188
 189         (void) uuid_generate((uchar_t *)&uuid);
 190         UUID_LE_CONVERT(vptr->efi_disk_uguid, uuid);
 191         return (0);
 192 }
 193
 194 /*
 195  * Read EFI - return partition number upon success.
 196  */
 197 int
 198 efi_alloc_and_read(int fd, struct dk_gpt **vtoc)
 199 {
 200         int                     rval;
 201         uint32_t                nparts;
 202         int                     length;
 203
 204         /* figure out the number of entries that would fit into 16K */
 205         nparts = EFI_MIN_ARRAY_SIZE / sizeof (efi_gpe_t);
 206         length = (int) sizeof (struct dk_gpt) +
 207             (int) sizeof (struct dk_part) * (nparts - 1);
 208         if ((*vtoc = calloc(length, 1)) == NULL)
 209                 return (VT_ERROR);
 210
 211         (*vtoc)->efi_nparts = nparts;
 212         rval = efi_read(fd, *vtoc);
 213
 214         if ((rval == VT_EINVAL) && (*vtoc)->efi_nparts > nparts) {
 215                 void *tmp;
 216                 length = (int) sizeof (struct dk_gpt) +
 217                     (int) sizeof (struct dk_part) *
 218                     ((*vtoc)->efi_nparts - 1);
 219                 nparts = (*vtoc)->efi_nparts;
 220                 if ((tmp = realloc(*vtoc, length)) == NULL) {
 221                         free (*vtoc);
 222                         *vtoc = NULL;
 223                         return (VT_ERROR);
 224                 } else {
 225                         *vtoc = tmp;
 226                         rval = efi_read(fd, *vtoc);
 227                 }
 228         }
 229
 230         if (rval < 0) {
 231                 if (efi_debug) {
 232                         (void) fprintf(stderr,
 233                             "read of EFI table failed, rval=%d\n", rval);
 234                 }
 235                 free (*vtoc);
 236                 *vtoc = NULL;
 237         }
 238
 239         return (rval);
 240 }
 241
 242 static int
 243 efi_ioctl(int fd, int cmd, dk_efi_t *dk_ioc)
 244 {
 245         void *data = dk_ioc->dki_data;
 246         int error;
 247
 248         dk_ioc->dki_data_64 = (uint64_t)(uintptr_t)data;
 249         error = ioctl(fd, cmd, (void *)dk_ioc);
 250         dk_ioc->dki_data = data;
 251
 252         return (error);
 253 }
 254
 255 static int
 256 check_label(int fd, dk_efi_t *dk_ioc)
 257 {
 258         efi_gpt_t               *efi;
 259         uint_t                  crc;
 260
 261         if (efi_ioctl(fd, DKIOCGETEFI, dk_ioc) == -1) {
 262                 switch (errno) {
 263                 case EIO:
 264                         return (VT_EIO);
 265                 default:
 266                         return (VT_ERROR);
 267                 }
 268         }
 269         efi = dk_ioc->dki_data;
 270         if (efi->efi_gpt_Signature != LE_64(EFI_SIGNATURE)) {
 271                 if (efi_debug)
 272                         (void) fprintf(stderr,
 273                             "Bad EFI signature: 0x%llx != 0x%llx\n",
 274                             (long long)efi->efi_gpt_Signature,
 275                             (long long)LE_64(EFI_SIGNATURE));
 276                 return (VT_EINVAL);
 277         }
 278
 279         /*
 280          * check CRC of the header; the size of the header should
 281          * never be larger than one block
 282          */
 283         crc = efi->efi_gpt_HeaderCRC32;
 284         efi->efi_gpt_HeaderCRC32 = 0;
 285
 286         if (((len_t)LE_32(efi->efi_gpt_HeaderSize) > dk_ioc->dki_length) ||
 287             crc != LE_32(efi_crc32((unsigned char *)efi,
 288             LE_32(efi->efi_gpt_HeaderSize)))) {
 289                 if (efi_debug)
 290                         (void) fprintf(stderr,
 291                             "Bad EFI CRC: 0x%x != 0x%x\n",
 292                             crc,
 293                             LE_32(efi_crc32((unsigned char *)efi,
 294                             sizeof (struct efi_gpt))));
 295                 return (VT_EINVAL);
 296         }
 297
 298         return (0);
 299 }
 300
 301 static int
 302 efi_read(int fd, struct dk_gpt *vtoc)
 303 {
 304         int                     i, j;
 305         int                     label_len;
 306         int                     rval = 0;
 307         int                     md_flag = 0;
 308         int                     vdc_flag = 0;
 309         struct dk_minfo         disk_info;
 310         dk_efi_t                dk_ioc;
 311         efi_gpt_t               *efi;
 312         efi_gpe_t               *efi_parts;
 313         struct dk_cinfo         dki_info;
 314         uint32_t                user_length;
 315         boolean_t               legacy_label = B_FALSE;
 316
 317         /*
 318          * get the partition number for this file descriptor.
 319          */
 320         if (ioctl(fd, DKIOCINFO, (caddr_t)&dki_info) == -1) {
 321                 if (efi_debug) {
 322                         (void) fprintf(stderr, "DKIOCINFO errno 0x%x\n", errno);
 323                 }
 324                 switch (errno) {
 325                 case EIO:
 326                         return (VT_EIO);
 327                 case EINVAL:
 328                         return (VT_EINVAL);
 329                 default:
 330                         return (VT_ERROR);
 331                 }
 332         }
 333         if ((strncmp(dki_info.dki_cname, "pseudo", 7) == 0) &&
 334             (strncmp(dki_info.dki_dname, "md", 3) == 0)) {
 335                 md_flag++;
 336         } else if ((strncmp(dki_info.dki_cname, "vdc", 4) == 0) &&
 337             (strncmp(dki_info.dki_dname, "vdc", 4) == 0)) {
 338                 /*
 339                  * The controller and drive name "vdc" (virtual disk client)
 340                  * indicates a LDoms virtual disk.
 341                  */
 342                 vdc_flag++;
 343         }
 344
 345         /* get the LBA size */
 346         if (ioctl(fd, DKIOCGMEDIAINFO, (caddr_t)&disk_info) == -1) {
 347                 if (efi_debug) {
 348                         (void) fprintf(stderr,
 349                             "assuming LBA 512 bytes %d\n",
 350                             errno);
 351                 }
 352                 disk_info.dki_lbsize = DEV_BSIZE;
 353         }
 354         if (disk_info.dki_lbsize == 0) {
 355                 if (efi_debug) {
 356                         (void) fprintf(stderr,
 357                             "efi_read: assuming LBA 512 bytes\n");
 358                 }
 359                 disk_info.dki_lbsize = DEV_BSIZE;
 360         }
 361         /*
 362          * Read the EFI GPT to figure out how many partitions we need
 363          * to deal with.
 364          */
 365         dk_ioc.dki_lba = 1;
 366         if (NBLOCKS(vtoc->efi_nparts, disk_info.dki_lbsize) < 34) {
 367                 label_len = EFI_MIN_ARRAY_SIZE + disk_info.dki_lbsize;
 368         } else {
 369                 label_len = vtoc->efi_nparts * (int) sizeof (efi_gpe_t) +
 370                     disk_info.dki_lbsize;
 371                 if (label_len % disk_info.dki_lbsize) {
 372                         /* pad to physical sector size */
 373                         label_len += disk_info.dki_lbsize;
 374                         label_len &= ~(disk_info.dki_lbsize - 1);
 375                 }
 376         }
 377
 378         if ((dk_ioc.dki_data = calloc(label_len, 1)) == NULL)
 379                 return (VT_ERROR);
 380
 381         dk_ioc.dki_length = disk_info.dki_lbsize;
 382         user_length = vtoc->efi_nparts;
 383         efi = dk_ioc.dki_data;
 384         if (md_flag) {
 385                 dk_ioc.dki_length = label_len;
 386                 if (efi_ioctl(fd, DKIOCGETEFI, &dk_ioc) == -1) {
 387                         switch (errno) {
 388                         case EIO:
 389                                 return (VT_EIO);
 390                         default:
 391                                 return (VT_ERROR);
 392                         }
 393                 }
 394         } else if ((rval = check_label(fd, &dk_ioc)) == VT_EINVAL) {
 395                 /*
 396                  * No valid label here; try the alternate. Note that here
 397                  * we just read GPT header and save it into dk_ioc.data,
 398                  * Later, we will read GUID partition entry array if we
 399                  * can get valid GPT header.
 400                  */
 401
 402                 /*
 403                  * This is a workaround for legacy systems. In the past, the
 404                  * last sector of SCSI disk was invisible on x86 platform. At
 405                  * that time, backup label was saved on the next to the last
 406                  * sector. It is possible for users to move a disk from previous
 407                  * solaris system to present system. Here, we attempt to search
 408                  * legacy backup EFI label first.
 409                  */
 410                 dk_ioc.dki_lba = disk_info.dki_capacity - 2;
 411                 dk_ioc.dki_length = disk_info.dki_lbsize;
 412                 rval = check_label(fd, &dk_ioc);
 413                 if (rval == VT_EINVAL) {
 414                         /*
 415                          * we didn't find legacy backup EFI label, try to
 416                          * search backup EFI label in the last block.
 417                          */
 418                         dk_ioc.dki_lba = disk_info.dki_capacity - 1;
 419                         dk_ioc.dki_length = disk_info.dki_lbsize;
 420                         rval = check_label(fd, &dk_ioc);
 421                         if (rval == 0) {
 422                                 legacy_label = B_TRUE;
 423                                 if (efi_debug)
 424                                         (void) fprintf(stderr,
 425                                             "efi_read: primary label corrupt; "
 426                                             "using EFI backup label located on"
 427                                             " the last block\n");
 428                         }
 429                 } else {
 430                         if ((efi_debug) && (rval == 0))
 431                                 (void) fprintf(stderr, "efi_read: primary label"
 432                                     " corrupt; using legacy EFI backup label "
 433                                     " located on the next to last block\n");
 434                 }
 435
 436                 if (rval == 0) {
 437                         dk_ioc.dki_lba = LE_64(efi->efi_gpt_PartitionEntryLBA);
 438                         vtoc->efi_flags |= EFI_GPT_PRIMARY_CORRUPT;
 439                         vtoc->efi_nparts =
 440                             LE_32(efi->efi_gpt_NumberOfPartitionEntries);
 441                         /*
 442                          * Partition tables are between backup GPT header
 443                          * table and ParitionEntryLBA (the starting LBA of
 444                          * the GUID partition entries array). Now that we
 445                          * already got valid GPT header and saved it in
 446                          * dk_ioc.dki_data, we try to get GUID partition
 447                          * entry array here.
 448                          */
 449                         /* LINTED */
 450                         dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data
 451                             + disk_info.dki_lbsize);
 452                         if (legacy_label)
 453                                 dk_ioc.dki_length = disk_info.dki_capacity - 1 -
 454                                     dk_ioc.dki_lba;
 455                         else
 456                                 dk_ioc.dki_length = disk_info.dki_capacity - 2 -
 457                                     dk_ioc.dki_lba;
 458                         dk_ioc.dki_length *= disk_info.dki_lbsize;
 459                         if (dk_ioc.dki_length >
 460                             ((len_t)label_len - sizeof (*dk_ioc.dki_data))) {
 461                                 rval = VT_EINVAL;
 462                         } else {
 463                                 /*
 464                                  * read GUID partition entry array
 465                                  */
 466                                 rval = efi_ioctl(fd, DKIOCGETEFI, &dk_ioc);
 467                         }
 468                 }
 469
 470         } else if (rval == 0) {
 471
 472                 dk_ioc.dki_lba = LE_64(efi->efi_gpt_PartitionEntryLBA);
 473                 /* LINTED */
 474                 dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data
 475                     + disk_info.dki_lbsize);
 476                 dk_ioc.dki_length = label_len - disk_info.dki_lbsize;
 477                 rval = efi_ioctl(fd, DKIOCGETEFI, &dk_ioc);
 478
 479         } else if (vdc_flag && rval == VT_ERROR && errno == EINVAL) {
 480                 /*
 481                  * When the device is a LDoms virtual disk, the DKIOCGETEFI
 482                  * ioctl can fail with EINVAL if the virtual disk backend
 483                  * is a ZFS volume serviced by a domain running an old version
 484                  * of Solaris. This is because the DKIOCGETEFI ioctl was
 485                  * initially incorrectly implemented for a ZFS volume and it
 486                  * expected the GPT and GPE to be retrieved with a single ioctl.
 487                  * So we try to read the GPT and the GPE using that old style
 488                  * ioctl.
 489                  */
 490                 dk_ioc.dki_lba = 1;
 491                 dk_ioc.dki_length = label_len;
 492                 rval = check_label(fd, &dk_ioc);
 493         }
 494
 495         if (rval < 0) {
 496                 free(efi);
 497                 return (rval);
 498         }
 499
 500         /* LINTED -- always longlong aligned */
 501         efi_parts = (efi_gpe_t *)(((char *)efi) + disk_info.dki_lbsize);
 502
 503         /*
 504          * Assemble this into a "dk_gpt" struct for easier
 505          * digestibility by applications.
 506          */
 507         vtoc->efi_version = LE_32(efi->efi_gpt_Revision);
 508         vtoc->efi_nparts = LE_32(efi->efi_gpt_NumberOfPartitionEntries);
 509         vtoc->efi_part_size = LE_32(efi->efi_gpt_SizeOfPartitionEntry);
 510         vtoc->efi_lbasize = disk_info.dki_lbsize;
 511         vtoc->efi_last_lba = disk_info.dki_capacity - 1;
 512         vtoc->efi_first_u_lba = LE_64(efi->efi_gpt_FirstUsableLBA);
 513         vtoc->efi_last_u_lba = LE_64(efi->efi_gpt_LastUsableLBA);
 514         vtoc->efi_altern_lba = LE_64(efi->efi_gpt_AlternateLBA);
 515         UUID_LE_CONVERT(vtoc->efi_disk_uguid, efi->efi_gpt_DiskGUID);
 516
 517         /*
 518          * If the array the user passed in is too small, set the length
 519          * to what it needs to be and return
 520          */
 521         if (user_length < vtoc->efi_nparts) {
 522                 return (VT_EINVAL);
 523         }
 524
 525         for (i = 0; i < vtoc->efi_nparts; i++) {
 526
 527                 UUID_LE_CONVERT(vtoc->efi_parts[i].p_guid,
 528                     efi_parts[i].efi_gpe_PartitionTypeGUID);
 529
 530                 for (j = 0;
 531                     j < sizeof (conversion_array)
 532                     / sizeof (struct uuid_to_ptag); j++) {
 533
 534                         if (bcmp(&vtoc->efi_parts[i].p_guid,
 535                             &conversion_array[j].uuid,
 536                             sizeof (struct uuid)) == 0) {
 537                                 vtoc->efi_parts[i].p_tag = j;
 538                                 break;
 539                         }
 540                 }
 541                 if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED)
 542                         continue;
 543                 vtoc->efi_parts[i].p_flag =
 544                     LE_16(efi_parts[i].efi_gpe_Attributes.PartitionAttrs);
 545                 vtoc->efi_parts[i].p_start =
 546                     LE_64(efi_parts[i].efi_gpe_StartingLBA);
 547                 vtoc->efi_parts[i].p_size =
 548                     LE_64(efi_parts[i].efi_gpe_EndingLBA) -
 549                     vtoc->efi_parts[i].p_start + 1;
 550                 for (j = 0; j < EFI_PART_NAME_LEN; j++) {
 551                         vtoc->efi_parts[i].p_name[j] =
 552                             (uchar_t)LE_16(
 553                             efi_parts[i].efi_gpe_PartitionName[j]);
 554                 }
 555
 556                 UUID_LE_CONVERT(vtoc->efi_parts[i].p_uguid,
 557                     efi_parts[i].efi_gpe_UniquePartitionGUID);
 558         }
 559         free(efi);
 560
 561         return (dki_info.dki_partition);
 562 }
 563
 564 /* writes a "protective" MBR */
 565 static int
 566 write_pmbr(int fd, struct dk_gpt *vtoc)
 567 {
 568         dk_efi_t        dk_ioc;
 569         struct mboot    mb;
 570         uchar_t         *cp;
 571         diskaddr_t      size_in_lba;
 572         uchar_t         *buf;
 573         int             len;
 574
 575         len = (vtoc->efi_lbasize == 0) ? sizeof (mb) : vtoc->efi_lbasize;
 576         buf = calloc(len, 1);
 577
 578         /*
 579          * Preserve any boot code and disk signature if the first block is
 580          * already an MBR.
 581          */
 582         dk_ioc.dki_lba = 0;
 583         dk_ioc.dki_length = len;
 584         /* LINTED -- always longlong aligned */
 585         dk_ioc.dki_data = (efi_gpt_t *)buf;
 586         if (efi_ioctl(fd, DKIOCGETEFI, &dk_ioc) == -1) {
 587                 (void *) memcpy(&mb, buf, sizeof (mb));
 588                 bzero(&mb, sizeof (mb));
 589                 mb.signature = LE_16(MBB_MAGIC);
 590         } else {
 591                 (void *) memcpy(&mb, buf, sizeof (mb));
 592                 if (mb.signature != LE_16(MBB_MAGIC)) {
 593                         bzero(&mb, sizeof (mb));
 594                         mb.signature = LE_16(MBB_MAGIC);
 595                 }
 596         }
 597
 598         bzero(&mb.parts, sizeof (mb.parts));
 599         cp = (uchar_t *)&mb.parts[0];
 600         /* bootable or not */
 601         *cp++ = 0;
 602         /* beginning CHS; 0xffffff if not representable */
 603         *cp++ = 0xff;
 604         *cp++ = 0xff;
 605         *cp++ = 0xff;
 606         /* OS type */
 607         *cp++ = EFI_PMBR;
 608         /* ending CHS; 0xffffff if not representable */
 609         *cp++ = 0xff;
 610         *cp++ = 0xff;
 611         *cp++ = 0xff;
 612         /* starting LBA: 1 (little endian format) by EFI definition */
 613         *cp++ = 0x01;
 614         *cp++ = 0x00;
 615         *cp++ = 0x00;
 616         *cp++ = 0x00;
 617         /* ending LBA: last block on the disk (little endian format) */
 618         size_in_lba = vtoc->efi_last_lba;
 619         if (size_in_lba < 0xffffffff) {
 620                 *cp++ = (size_in_lba & 0x000000ff);
 621                 *cp++ = (size_in_lba & 0x0000ff00) >> 8;
 622                 *cp++ = (size_in_lba & 0x00ff0000) >> 16;
 623                 *cp++ = (size_in_lba & 0xff000000) >> 24;
 624         } else {
 625                 *cp++ = 0xff;
 626                 *cp++ = 0xff;
 627                 *cp++ = 0xff;
 628                 *cp++ = 0xff;
 629         }
 630
 631         (void *) memcpy(buf, &mb, sizeof (mb));
 632         /* LINTED -- always longlong aligned */
 633         dk_ioc.dki_data = (efi_gpt_t *)buf;
 634         dk_ioc.dki_lba = 0;
 635         dk_ioc.dki_length = len;
 636         if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) {
 637                 free(buf);
 638                 switch (errno) {
 639                 case EIO:
 640                         return (VT_EIO);
 641                 case EINVAL:
 642                         return (VT_EINVAL);
 643                 default:
 644                         return (VT_ERROR);
 645                 }
 646         }
 647         free(buf);
 648         return (0);
 649 }
 650
 651 /* make sure the user specified something reasonable */
 652 static int
 653 check_input(struct dk_gpt *vtoc)
 654 {
 655         int                     resv_part = -1;
 656         int                     i, j;
 657         diskaddr_t              istart, jstart, isize, jsize, endsect;
 658
 659         /*
 660          * Sanity-check the input (make sure no partitions overlap)
 661          */
 662         for (i = 0; i < vtoc->efi_nparts; i++) {
 663                 /* It can't be unassigned and have an actual size */
 664                 if ((vtoc->efi_parts[i].p_tag == V_UNASSIGNED) &&
 665                     (vtoc->efi_parts[i].p_size != 0)) {
 666                         if (efi_debug) {
 667                                 (void) fprintf(stderr,
 668 "partition %d is \"unassigned\" but has a size of %llu",
 669                                     i,
 670                                     vtoc->efi_parts[i].p_size);
 671                         }
 672                         return (VT_EINVAL);
 673                 }
 674                 if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED) {
 675                         if (uuid_is_null((uchar_t *)&vtoc->efi_parts[i].p_guid))
 676                                 continue;
 677                         /* we have encountered an unknown uuid */
 678                         vtoc->efi_parts[i].p_tag = 0xff;
 679                 }
 680                 if (vtoc->efi_parts[i].p_tag == V_RESERVED) {
 681                         if (resv_part != -1) {
 682                                 if (efi_debug) {
 683                                         (void) fprintf(stderr,
 684 "found duplicate reserved partition at %d\n",
 685                                             i);
 686                                 }
 687                                 return (VT_EINVAL);
 688                         }
 689                         resv_part = i;
 690                 }
 691                 if ((vtoc->efi_parts[i].p_start < vtoc->efi_first_u_lba) ||
 692                     (vtoc->efi_parts[i].p_start > vtoc->efi_last_u_lba)) {
 693                         if (efi_debug) {
 694                                 (void) fprintf(stderr,
 695                                     "Partition %d starts at %llu.  ",
 696                                     i,
 697                                     vtoc->efi_parts[i].p_start);
 698                                 (void) fprintf(stderr,
 699                                     "It must be between %llu and %llu.\n",
 700                                     vtoc->efi_first_u_lba,
 701                                     vtoc->efi_last_u_lba);
 702                         }
 703                         return (VT_EINVAL);
 704                 }
 705                 if ((vtoc->efi_parts[i].p_start +
 706                     vtoc->efi_parts[i].p_size <
 707                     vtoc->efi_first_u_lba) ||
 708                     (vtoc->efi_parts[i].p_start +
 709                     vtoc->efi_parts[i].p_size >
 710                     vtoc->efi_last_u_lba + 1)) {
 711                         if (efi_debug) {
 712                                 (void) fprintf(stderr,
 713                                     "Partition %d ends at %llu.  ",
 714                                     i,
 715                                     vtoc->efi_parts[i].p_start +
 716                                     vtoc->efi_parts[i].p_size);
 717                                 (void) fprintf(stderr,
 718                                     "It must be between %llu and %llu.\n",
 719                                     vtoc->efi_first_u_lba,
 720                                     vtoc->efi_last_u_lba);
 721                         }
 722                         return (VT_EINVAL);
 723                 }
 724
 725                 for (j = 0; j < vtoc->efi_nparts; j++) {
 726                         isize = vtoc->efi_parts[i].p_size;
 727                         jsize = vtoc->efi_parts[j].p_size;
 728                         istart = vtoc->efi_parts[i].p_start;
 729                         jstart = vtoc->efi_parts[j].p_start;
 730                         if ((i != j) && (isize != 0) && (jsize != 0)) {
 731                                 endsect = jstart + jsize -1;
 732                                 if ((jstart <= istart) &&
 733                                     (istart <= endsect)) {
 734                                         if (efi_debug) {
 735                                                 (void) fprintf(stderr,
 736 "Partition %d overlaps partition %d.",
 737                                                     i, j);
 738                                         }
 739                                         return (VT_EINVAL);
 740                                 }
 741                         }
 742                 }
 743         }
 744         /* just a warning for now */
 745         if ((resv_part == -1) && efi_debug) {
 746                 (void) fprintf(stderr,
 747                     "no reserved partition found\n");
 748         }
 749         return (0);
 750 }
 751
 752 /*
 753  * add all the unallocated space to the current label
 754  */
 755 int
 756 efi_use_whole_disk(int fd)
 757 {
 758         struct dk_gpt           *efi_label;
 759         int                     rval;
 760         int                     i;
 761         uint_t                  phy_last_slice = 0;
 762         diskaddr_t              pl_start = 0;
 763         diskaddr_t              pl_size;
 764
 765         rval = efi_alloc_and_read(fd, &efi_label);
 766         if (rval < 0) {
 767                 return (rval);
 768         }
 769
 770         /* find the last physically non-zero partition */
 771         for (i = 0; i < efi_label->efi_nparts - 2; i ++) {
 772                 if (pl_start < efi_label->efi_parts[i].p_start) {
 773                         pl_start = efi_label->efi_parts[i].p_start;
 774                         phy_last_slice = i;
 775                 }
 776         }
 777         pl_size = efi_label->efi_parts[phy_last_slice].p_size;
 778
 779         /*
 780          * If alter_lba is 1, we are using the backup label.
 781          * Since we can locate the backup label by disk capacity,
 782          * there must be no unallocated space.
 783          */
 784         if ((efi_label->efi_altern_lba == 1) || (efi_label->efi_altern_lba
 785             >= efi_label->efi_last_lba)) {
 786                 if (efi_debug) {
 787                         (void) fprintf(stderr,
 788                             "efi_use_whole_disk: requested space not found\n");
 789                 }
 790                 efi_free(efi_label);
 791                 return (VT_ENOSPC);
 792         }
 793
 794         /*
 795          * If there is space between the last physically non-zero partition
 796          * and the reserved partition, just add the unallocated space to this
 797          * area. Otherwise, the unallocated space is added to the last
 798          * physically non-zero partition.
 799          */
 800         if (pl_start + pl_size - 1 == efi_label->efi_last_u_lba -
 801             EFI_MIN_RESV_SIZE) {
 802                 efi_label->efi_parts[phy_last_slice].p_size +=
 803                     efi_label->efi_last_lba - efi_label->efi_altern_lba;
 804         }
 805
 806         /*
 807          * Move the reserved partition. There is currently no data in
 808          * here except fabricated devids (which get generated via
 809          * efi_write()). So there is no need to copy data.
 810          */
 811         efi_label->efi_parts[efi_label->efi_nparts - 1].p_start +=
 812             efi_label->efi_last_lba - efi_label->efi_altern_lba;
 813         efi_label->efi_last_u_lba += efi_label->efi_last_lba
 814             - efi_label->efi_altern_lba;
 815
 816         rval = efi_write(fd, efi_label);
 817         if (rval < 0) {
 818                 if (efi_debug) {
 819                         (void) fprintf(stderr,
 820                             "efi_use_whole_disk:fail to write label, rval=%d\n",
 821                             rval);
 822                 }
 823                 efi_free(efi_label);
 824                 return (rval);
 825         }
 826
 827         efi_free(efi_label);
 828         return (0);
 829 }
 830
 831
 832 /*
 833  * write EFI label and backup label
 834  */
 835 int
 836 efi_write(int fd, struct dk_gpt *vtoc)
 837 {
 838         dk_efi_t                dk_ioc;
 839         efi_gpt_t               *efi;
 840         efi_gpe_t               *efi_parts;
 841         int                     i, j;
 842         struct dk_cinfo         dki_info;
 843         int                     md_flag = 0;
 844         int                     nblocks;
 845         diskaddr_t              lba_backup_gpt_hdr;
 846
 847         if (ioctl(fd, DKIOCINFO, (caddr_t)&dki_info) == -1) {
 848                 if (efi_debug)
 849                         (void) fprintf(stderr, "DKIOCINFO errno 0x%x\n", errno);
 850                 switch (errno) {
 851                 case EIO:
 852                         return (VT_EIO);
 853                 case EINVAL:
 854                         return (VT_EINVAL);
 855                 default:
 856                         return (VT_ERROR);
 857                 }
 858         }
 859
 860         /* check if we are dealing wih a metadevice */
 861         if ((strncmp(dki_info.dki_cname, "pseudo", 7) == 0) &&
 862             (strncmp(dki_info.dki_dname, "md", 3) == 0)) {
 863                 md_flag = 1;
 864         }
 865
 866         if (check_input(vtoc)) {
 867                 /*
 868                  * not valid; if it's a metadevice just pass it down
 869                  * because SVM will do its own checking
 870                  */
 871                 if (md_flag == 0) {
 872                         return (VT_EINVAL);
 873                 }
 874         }
 875
 876         dk_ioc.dki_lba = 1;
 877         if (NBLOCKS(vtoc->efi_nparts, vtoc->efi_lbasize) < 34) {
 878                 dk_ioc.dki_length = EFI_MIN_ARRAY_SIZE + vtoc->efi_lbasize;
 879         } else {
 880                 dk_ioc.dki_length = NBLOCKS(vtoc->efi_nparts,
 881                     vtoc->efi_lbasize) *
 882                     vtoc->efi_lbasize;
 883         }
 884
 885         /*
 886          * the number of blocks occupied by GUID partition entry array
 887          */
 888         nblocks = dk_ioc.dki_length / vtoc->efi_lbasize - 1;
 889
 890         /*
 891          * Backup GPT header is located on the block after GUID
 892          * partition entry array. Here, we calculate the address
 893          * for backup GPT header.
 894          */
 895         lba_backup_gpt_hdr = vtoc->efi_last_u_lba + 1 + nblocks;
 896         if ((dk_ioc.dki_data = calloc(dk_ioc.dki_length, 1)) == NULL)
 897                 return (VT_ERROR);
 898
 899         efi = dk_ioc.dki_data;
 900
 901         /* stuff user's input into EFI struct */
 902         efi->efi_gpt_Signature = LE_64(EFI_SIGNATURE);
 903         efi->efi_gpt_Revision = LE_32(vtoc->efi_version); /* 0x02000100 */
 904         efi->efi_gpt_HeaderSize = LE_32(sizeof (struct efi_gpt));
 905         efi->efi_gpt_Reserved1 = 0;
 906         efi->efi_gpt_MyLBA = LE_64(1ULL);
 907         efi->efi_gpt_AlternateLBA = LE_64(lba_backup_gpt_hdr);
 908         efi->efi_gpt_FirstUsableLBA = LE_64(vtoc->efi_first_u_lba);
 909         efi->efi_gpt_LastUsableLBA = LE_64(vtoc->efi_last_u_lba);
 910         efi->efi_gpt_PartitionEntryLBA = LE_64(2ULL);
 911         efi->efi_gpt_NumberOfPartitionEntries = LE_32(vtoc->efi_nparts);
 912         efi->efi_gpt_SizeOfPartitionEntry = LE_32(sizeof (struct efi_gpe));
 913         UUID_LE_CONVERT(efi->efi_gpt_DiskGUID, vtoc->efi_disk_uguid);
 914
 915         /* LINTED -- always longlong aligned */
 916         efi_parts = (efi_gpe_t *)((char *)dk_ioc.dki_data + vtoc->efi_lbasize);
 917
 918         for (i = 0; i < vtoc->efi_nparts; i++) {
 919                 for (j = 0;
 920                     j < sizeof (conversion_array) /
 921                     sizeof (struct uuid_to_ptag); j++) {
 922
 923                         if (vtoc->efi_parts[i].p_tag == j) {
 924                                 UUID_LE_CONVERT(
 925                                     efi_parts[i].efi_gpe_PartitionTypeGUID,
 926                                     conversion_array[j].uuid);
 927                                 break;
 928                         }
 929                 }
 930
 931                 if (j == sizeof (conversion_array) /
 932                     sizeof (struct uuid_to_ptag)) {
 933                         /*
 934                          * If we didn't have a matching uuid match, bail here.
 935                          * Don't write a label with unknown uuid.
 936                          */
 937                         if (efi_debug) {
 938                                 (void) fprintf(stderr,
 939                                     "Unknown uuid for p_tag %d\n",
 940                                     vtoc->efi_parts[i].p_tag);
 941                         }
 942                         return (VT_EINVAL);
 943                 }
 944
 945                 efi_parts[i].efi_gpe_StartingLBA =
 946                     LE_64(vtoc->efi_parts[i].p_start);
 947                 efi_parts[i].efi_gpe_EndingLBA =
 948                     LE_64(vtoc->efi_parts[i].p_start +
 949                     vtoc->efi_parts[i].p_size - 1);
 950                 efi_parts[i].efi_gpe_Attributes.PartitionAttrs =
 951                     LE_16(vtoc->efi_parts[i].p_flag);
 952                 for (j = 0; j < EFI_PART_NAME_LEN; j++) {
 953                         efi_parts[i].efi_gpe_PartitionName[j] =
 954                             LE_16((ushort_t)vtoc->efi_parts[i].p_name[j]);
 955                 }
 956                 if ((vtoc->efi_parts[i].p_tag != V_UNASSIGNED) &&
 957                     uuid_is_null((uchar_t *)&vtoc->efi_parts[i].p_uguid)) {
 958                         (void) uuid_generate((uchar_t *)
 959                             &vtoc->efi_parts[i].p_uguid);
 960                 }
 961                 bcopy(&vtoc->efi_parts[i].p_uguid,
 962                     &efi_parts[i].efi_gpe_UniquePartitionGUID,
 963                     sizeof (uuid_t));
 964         }
 965         efi->efi_gpt_PartitionEntryArrayCRC32 =
 966             LE_32(efi_crc32((unsigned char *)efi_parts,
 967             vtoc->efi_nparts * (int)sizeof (struct efi_gpe)));
 968         efi->efi_gpt_HeaderCRC32 =
 969             LE_32(efi_crc32((unsigned char *)efi, sizeof (struct efi_gpt)));
 970
 971         if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) {
 972                 free(dk_ioc.dki_data);
 973                 switch (errno) {
 974                 case EIO:
 975                         return (VT_EIO);
 976                 case EINVAL:
 977                         return (VT_EINVAL);
 978                 default:
 979                         return (VT_ERROR);
 980                 }
 981         }
 982         /* if it's a metadevice we're done */
 983         if (md_flag) {
 984                 free(dk_ioc.dki_data);
 985                 return (0);
 986         }
 987
 988         /* write backup partition array */
 989         dk_ioc.dki_lba = vtoc->efi_last_u_lba + 1;
 990         dk_ioc.dki_length -= vtoc->efi_lbasize;
 991         /* LINTED */
 992         dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data +
 993             vtoc->efi_lbasize);
 994
 995         if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) {
 996                 /*
 997                  * we wrote the primary label okay, so don't fail
 998                  */
 999                 if (efi_debug) {
1000                         (void) fprintf(stderr,
1001                             "write of backup partitions to block %llu "
1002                             "failed, errno %d\n",
1003                             vtoc->efi_last_u_lba + 1,
1004                             errno);
1005                 }
1006         }
1007         /*
1008          * now swap MyLBA and AlternateLBA fields and write backup
1009          * partition table header
1010          */
1011         dk_ioc.dki_lba = lba_backup_gpt_hdr;
1012         dk_ioc.dki_length = vtoc->efi_lbasize;
1013         /* LINTED */
1014         dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data -
1015             vtoc->efi_lbasize);
1016         efi->efi_gpt_AlternateLBA = LE_64(1ULL);
1017         efi->efi_gpt_MyLBA = LE_64(lba_backup_gpt_hdr);
1018         efi->efi_gpt_PartitionEntryLBA = LE_64(vtoc->efi_last_u_lba + 1);
1019         efi->efi_gpt_HeaderCRC32 = 0;
1020         efi->efi_gpt_HeaderCRC32 =
1021             LE_32(efi_crc32((unsigned char *)dk_ioc.dki_data,
1022             sizeof (struct efi_gpt)));
1023
1024         if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) {
1025                 if (efi_debug) {
1026                         (void) fprintf(stderr,
1027                             "write of backup header to block %llu failed, "
1028                             "errno %d\n",
1029                             lba_backup_gpt_hdr,
1030                             errno);
1031                 }
1032         }
1033         /* write the PMBR */
1034         (void) write_pmbr(fd, vtoc);
1035         free(dk_ioc.dki_data);
1036         return (0);
1037 }
1038
1039 void
1040 efi_free(struct dk_gpt *ptr)
1041 {
1042         free(ptr);
1043 }
1044
1045 /*
1046  * Input: File descriptor
1047  * Output: 1 if disk has an EFI label, or > 2TB with no VTOC or legacy MBR.
1048  * Otherwise 0.
1049  */
1050 int
1051 efi_type(int fd)
1052 {
1053         struct vtoc vtoc;
1054         struct extvtoc extvtoc;
1055
1056         if (ioctl(fd, DKIOCGEXTVTOC, &extvtoc) == -1) {
1057                 if (errno == ENOTSUP)
1058                         return (1);
1059                 else if (errno == ENOTTY) {
1060                         if (ioctl(fd, DKIOCGVTOC, &vtoc) == -1)
1061                                 if (errno == ENOTSUP)
1062                                         return (1);
1063                 }
1064         }
1065         return (0);
1066 }
1067
1068 void
1069 efi_err_check(struct dk_gpt *vtoc)
1070 {
1071         int                     resv_part = -1;
1072         int                     i, j;
1073         diskaddr_t              istart, jstart, isize, jsize, endsect;
1074         int                     overlap = 0;
1075
1076         /*
1077          * make sure no partitions overlap
1078          */
1079         for (i = 0; i < vtoc->efi_nparts; i++) {
1080                 /* It can't be unassigned and have an actual size */
1081                 if ((vtoc->efi_parts[i].p_tag == V_UNASSIGNED) &&
1082                     (vtoc->efi_parts[i].p_size != 0)) {
1083                         (void) fprintf(stderr,
1084                             "partition %d is \"unassigned\" but has a size "
1085                             "of %llu\n", i, vtoc->efi_parts[i].p_size);
1086                 }
1087                 if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED) {
1088                         continue;
1089                 }
1090                 if (vtoc->efi_parts[i].p_tag == V_RESERVED) {
1091                         if (resv_part != -1) {
1092                                 (void) fprintf(stderr,
1093                                     "found duplicate reserved partition at "
1094                                     "%d\n", i);
1095                         }
1096                         resv_part = i;
1097                         if (vtoc->efi_parts[i].p_size != EFI_MIN_RESV_SIZE)
1098                                 (void) fprintf(stderr,
1099                                     "Warning: reserved partition size must "
1100                                     "be %d sectors\n", EFI_MIN_RESV_SIZE);
1101                 }
1102                 if ((vtoc->efi_parts[i].p_start < vtoc->efi_first_u_lba) ||
1103                     (vtoc->efi_parts[i].p_start > vtoc->efi_last_u_lba)) {
1104                         (void) fprintf(stderr,
1105                             "Partition %d starts at %llu\n",
1106                             i,
1107                             vtoc->efi_parts[i].p_start);
1108                         (void) fprintf(stderr,
1109                             "It must be between %llu and %llu.\n",
1110                             vtoc->efi_first_u_lba,
1111                             vtoc->efi_last_u_lba);
1112                 }
1113                 if ((vtoc->efi_parts[i].p_start +
1114                     vtoc->efi_parts[i].p_size <
1115                     vtoc->efi_first_u_lba) ||
1116                     (vtoc->efi_parts[i].p_start +
1117                     vtoc->efi_parts[i].p_size >
1118                     vtoc->efi_last_u_lba + 1)) {
1119                         (void) fprintf(stderr,
1120                             "Partition %d ends at %llu\n",
1121                             i,
1122                             vtoc->efi_parts[i].p_start +
1123                             vtoc->efi_parts[i].p_size);
1124                         (void) fprintf(stderr,
1125                             "It must be between %llu and %llu.\n",
1126                             vtoc->efi_first_u_lba,
1127                             vtoc->efi_last_u_lba);
1128                 }
1129
1130                 for (j = 0; j < vtoc->efi_nparts; j++) {
1131                         isize = vtoc->efi_parts[i].p_size;
1132                         jsize = vtoc->efi_parts[j].p_size;
1133                         istart = vtoc->efi_parts[i].p_start;
1134                         jstart = vtoc->efi_parts[j].p_start;
1135                         if ((i != j) && (isize != 0) && (jsize != 0)) {
1136                                 endsect = jstart + jsize -1;
1137                                 if ((jstart <= istart) &&
1138                                     (istart <= endsect)) {
1139                                         if (!overlap) {
1140                                         (void) fprintf(stderr,
1141                                             "label error: EFI Labels do not "
1142                                             "support overlapping partitions\n");
1143                                         }
1144                                         (void) fprintf(stderr,
1145                                             "Partition %d overlaps partition "
1146                                             "%d.\n", i, j);
1147                                         overlap = 1;
1148                                 }
1149                         }
1150                 }
1151         }
1152         /* make sure there is a reserved partition */
1153         if (resv_part == -1) {
1154                 (void) fprintf(stderr,
1155                     "no reserved partition found\n");
1156         }
1157 }
1158
1159 /*
1160  * We need to get information necessary to construct a *new* efi
1161  * label type
1162  */
1163 int
1164 efi_auto_sense(int fd, struct dk_gpt **vtoc)
1165 {
1166
1167         int     i;
1168
1169         /*
1170          * Now build the default partition table
1171          */
1172         if (efi_alloc_and_init(fd, EFI_NUMPAR, vtoc) != 0) {
1173                 if (efi_debug) {
1174                         (void) fprintf(stderr, "efi_alloc_and_init failed.\n");
1175                 }
1176                 return (-1);
1177         }
1178
1179         for (i = 0; i < min((*vtoc)->efi_nparts, V_NUMPAR); i++) {
1180                 (*vtoc)->efi_parts[i].p_tag = default_vtoc_map[i].p_tag;
1181                 (*vtoc)->efi_parts[i].p_flag = default_vtoc_map[i].p_flag;
1182                 (*vtoc)->efi_parts[i].p_start = 0;
1183                 (*vtoc)->efi_parts[i].p_size = 0;
1184         }
1185         /*
1186          * Make constants first
1187          * and variable partitions later
1188          */
1189
1190         /* root partition - s0 128 MB */
1191         (*vtoc)->efi_parts[0].p_start = 34;
1192         (*vtoc)->efi_parts[0].p_size = 262144;
1193
1194         /* partition - s1  128 MB */
1195         (*vtoc)->efi_parts[1].p_start = 262178;
1196         (*vtoc)->efi_parts[1].p_size = 262144;
1197
1198         /* partition -s2 is NOT the Backup disk */
1199         (*vtoc)->efi_parts[2].p_tag = V_UNASSIGNED;
1200
1201         /* partition -s6 /usr partition - HOG */
1202         (*vtoc)->efi_parts[6].p_start = 524322;
1203         (*vtoc)->efi_parts[6].p_size = (*vtoc)->efi_last_u_lba - 524322
1204             - (1024 * 16);
1205
1206         /* efi reserved partition - s9 16K */
1207         (*vtoc)->efi_parts[8].p_start = (*vtoc)->efi_last_u_lba - (1024 * 16);
1208         (*vtoc)->efi_parts[8].p_size = (1024 * 16);
1209         (*vtoc)->efi_parts[8].p_tag = V_RESERVED;
1210         return (0);
1211 }