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 (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Copyright 2012 Nexenta Systems, Inc.  All rights reserved.
  25  * Copyright 2014 Toomas Soome <tsoome@me.com>
  26  */
  27 
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <errno.h>
  31 #include <strings.h>
  32 #include <unistd.h>
  33 #include <uuid/uuid.h>
  34 #include <libintl.h>
  35 #include <sys/types.h>
  36 #include <sys/dkio.h>
  37 #include <sys/vtoc.h>
  38 #include <sys/mhd.h>
  39 #include <sys/param.h>
  40 #include <sys/dktp/fdisk.h>
  41 #include <sys/efi_partition.h>
  42 #include <sys/byteorder.h>
  43 #include <sys/ddi.h>
  44 
  45 static struct uuid_to_ptag {
  46         struct uuid     uuid;
  47 } conversion_array[] = {
  48         { EFI_UNUSED },
  49         { EFI_BOOT },
  50         { EFI_ROOT },
  51         { EFI_SWAP },
  52         { EFI_USR },
  53         { EFI_BACKUP },
  54         { 0 },                  /* STAND is never used */
  55         { EFI_VAR },
  56         { EFI_HOME },
  57         { EFI_ALTSCTR },
  58         { 0 },                  /* CACHE (cachefs) is never used */
  59         { EFI_RESERVED },
  60         { EFI_SYSTEM },
  61         { EFI_LEGACY_MBR },
  62         { EFI_SYMC_PUB },
  63         { EFI_SYMC_CDS },
  64         { EFI_MSFT_RESV },
  65         { EFI_DELL_BASIC },
  66         { EFI_DELL_RAID },
  67         { EFI_DELL_SWAP },
  68         { EFI_DELL_LVM },
  69         { EFI_DELL_RESV },
  70         { EFI_AAPL_HFS },
  71         { EFI_AAPL_UFS },
  72         { EFI_BIOS_BOOT },
  73         { EFI_FREEBSD_BOOT },
  74         { EFI_FREEBSD_SWAP },
  75         { EFI_FREEBSD_UFS },
  76         { EFI_FREEBSD_VINUM },
  77         { EFI_FREEBSD_ZFS }
  78 };
  79 
  80 /*
  81  * Default vtoc information for non-SVr4 partitions
  82  */
  83 struct dk_map2  default_vtoc_map[NDKMAP] = {
  84         {       V_ROOT,         0       },              /* a - 0 */
  85         {       V_SWAP,         V_UNMNT },              /* b - 1 */
  86         {       V_BACKUP,       V_UNMNT },              /* c - 2 */
  87         {       V_UNASSIGNED,   0       },              /* d - 3 */
  88         {       V_UNASSIGNED,   0       },              /* e - 4 */
  89         {       V_UNASSIGNED,   0       },              /* f - 5 */
  90         {       V_USR,          0       },              /* g - 6 */
  91         {       V_UNASSIGNED,   0       },              /* h - 7 */
  92 
  93 #if defined(_SUNOS_VTOC_16)
  94 
  95 #if defined(i386) || defined(__amd64)
  96         {       V_BOOT,         V_UNMNT },              /* i - 8 */
  97         {       V_ALTSCTR,      0       },              /* j - 9 */
  98 
  99 #else
 100 #error No VTOC format defined.
 101 #endif                  /* defined(i386) */
 102 
 103         {       V_UNASSIGNED,   0       },              /* k - 10 */
 104         {       V_UNASSIGNED,   0       },              /* l - 11 */
 105         {       V_UNASSIGNED,   0       },              /* m - 12 */
 106         {       V_UNASSIGNED,   0       },              /* n - 13 */
 107         {       V_UNASSIGNED,   0       },              /* o - 14 */
 108         {       V_UNASSIGNED,   0       },              /* p - 15 */
 109 #endif                  /* defined(_SUNOS_VTOC_16) */
 110 };
 111 
 112 #ifdef DEBUG
 113 int efi_debug = 1;
 114 #else
 115 int efi_debug = 0;
 116 #endif
 117 
 118 extern unsigned int     efi_crc32(const unsigned char *, unsigned int);
 119 static int              efi_read(int, struct dk_gpt *);
 120 
 121 static int
 122 read_disk_info(int fd, diskaddr_t *capacity, uint_t *lbsize)
 123 {
 124         struct dk_minfo         disk_info;
 125 
 126         if ((ioctl(fd, DKIOCGMEDIAINFO, (caddr_t)&disk_info)) == -1)
 127                 return (errno);
 128         *capacity = disk_info.dki_capacity;
 129         *lbsize = disk_info.dki_lbsize;
 130         return (0);
 131 }
 132 
 133 /*
 134  * the number of blocks the EFI label takes up (round up to nearest
 135  * block)
 136  */
 137 #define NBLOCKS(p, l)   (1 + ((((p) * (int)sizeof (efi_gpe_t))  + \
 138                                 ((l) - 1)) / (l)))
 139 /* number of partitions -- limited by what we can malloc */
 140 #define MAX_PARTS       ((4294967295UL - sizeof (struct dk_gpt)) / \
 141                             sizeof (struct dk_part))
 142 
 143 int
 144 efi_alloc_and_init(int fd, uint32_t nparts, struct dk_gpt **vtoc)
 145 {
 146         diskaddr_t      capacity;
 147         uint_t          lbsize;
 148         uint_t          nblocks;
 149         size_t          length;
 150         struct dk_gpt   *vptr;
 151         struct uuid     uuid;
 152 
 153         if (read_disk_info(fd, &capacity, &lbsize) != 0) {
 154                 if (efi_debug)
 155                         (void) fprintf(stderr,
 156                             "couldn't read disk information\n");
 157                 return (-1);
 158         }
 159 
 160         nblocks = NBLOCKS(nparts, lbsize);
 161         if ((nblocks * lbsize) < EFI_MIN_ARRAY_SIZE + lbsize) {
 162                 /* 16K plus one block for the GPT */
 163                 nblocks = EFI_MIN_ARRAY_SIZE / lbsize + 1;
 164         }
 165 
 166         if (nparts > MAX_PARTS) {
 167                 if (efi_debug) {
 168                         (void) fprintf(stderr,
 169                         "the maximum number of partitions supported is %lu\n",
 170                             MAX_PARTS);
 171                 }
 172                 return (-1);
 173         }
 174 
 175         length = sizeof (struct dk_gpt) +
 176             sizeof (struct dk_part) * (nparts - 1);
 177 
 178         if ((*vtoc = calloc(length, 1)) == NULL)
 179                 return (-1);
 180 
 181         vptr = *vtoc;
 182 
 183         vptr->efi_version = EFI_VERSION_CURRENT;
 184         vptr->efi_lbasize = lbsize;
 185         vptr->efi_nparts = nparts;
 186         /*
 187          * add one block here for the PMBR; on disks with a 512 byte
 188          * block size and 128 or fewer partitions, efi_first_u_lba
 189          * should work out to "34"
 190          */
 191         vptr->efi_first_u_lba = nblocks + 1;
 192         vptr->efi_last_lba = capacity - 1;
 193         vptr->efi_altern_lba = capacity -1;
 194         vptr->efi_last_u_lba = vptr->efi_last_lba - nblocks;
 195 
 196         (void) uuid_generate((uchar_t *)&uuid);
 197         UUID_LE_CONVERT(vptr->efi_disk_uguid, uuid);
 198         return (0);
 199 }
 200 
 201 /*
 202  * Read EFI - return partition number upon success.
 203  */
 204 int
 205 efi_alloc_and_read(int fd, struct dk_gpt **vtoc)
 206 {
 207         int                     rval;
 208         uint32_t                nparts;
 209         int                     length;
 210 
 211         /* figure out the number of entries that would fit into 16K */
 212         nparts = EFI_MIN_ARRAY_SIZE / sizeof (efi_gpe_t);
 213         length = (int) sizeof (struct dk_gpt) +
 214             (int) sizeof (struct dk_part) * (nparts - 1);
 215         if ((*vtoc = calloc(length, 1)) == NULL)
 216                 return (VT_ERROR);
 217 
 218         (*vtoc)->efi_nparts = nparts;
 219         rval = efi_read(fd, *vtoc);
 220 
 221         if ((rval == VT_EINVAL) && (*vtoc)->efi_nparts > nparts) {
 222                 void *tmp;
 223                 length = (int) sizeof (struct dk_gpt) +
 224                     (int) sizeof (struct dk_part) *
 225                     ((*vtoc)->efi_nparts - 1);
 226                 nparts = (*vtoc)->efi_nparts;
 227                 if ((tmp = realloc(*vtoc, length)) == NULL) {
 228                         free (*vtoc);
 229                         *vtoc = NULL;
 230                         return (VT_ERROR);
 231                 } else {
 232                         *vtoc = tmp;
 233                         rval = efi_read(fd, *vtoc);
 234                 }
 235         }
 236 
 237         if (rval < 0) {
 238                 if (efi_debug) {
 239                         (void) fprintf(stderr,
 240                             "read of EFI table failed, rval=%d\n", rval);
 241                 }
 242                 free (*vtoc);
 243                 *vtoc = NULL;
 244         }
 245 
 246         return (rval);
 247 }
 248 
 249 static int
 250 efi_ioctl(int fd, int cmd, dk_efi_t *dk_ioc)
 251 {
 252         void *data = dk_ioc->dki_data;
 253         int error;
 254 
 255         dk_ioc->dki_data_64 = (uint64_t)(uintptr_t)data;
 256         error = ioctl(fd, cmd, (void *)dk_ioc);
 257         dk_ioc->dki_data = data;
 258 
 259         return (error);
 260 }
 261 
 262 static int
 263 check_label(int fd, dk_efi_t *dk_ioc)
 264 {
 265         efi_gpt_t               *efi;
 266         uint_t                  crc;
 267 
 268         if (efi_ioctl(fd, DKIOCGETEFI, dk_ioc) == -1) {
 269                 switch (errno) {
 270                 case EIO:
 271                         return (VT_EIO);
 272                 default:
 273                         return (VT_ERROR);
 274                 }
 275         }
 276         efi = dk_ioc->dki_data;
 277         if (efi->efi_gpt_Signature != LE_64(EFI_SIGNATURE)) {
 278                 if (efi_debug)
 279                         (void) fprintf(stderr,
 280                             "Bad EFI signature: 0x%llx != 0x%llx\n",
 281                             (long long)efi->efi_gpt_Signature,
 282                             (long long)LE_64(EFI_SIGNATURE));
 283                 return (VT_EINVAL);
 284         }
 285 
 286         /*
 287          * check CRC of the header; the size of the header should
 288          * never be larger than one block
 289          */
 290         crc = efi->efi_gpt_HeaderCRC32;
 291         efi->efi_gpt_HeaderCRC32 = 0;
 292 
 293         if (((len_t)LE_32(efi->efi_gpt_HeaderSize) > dk_ioc->dki_length) ||
 294             crc != LE_32(efi_crc32((unsigned char *)efi,
 295             LE_32(efi->efi_gpt_HeaderSize)))) {
 296                 if (efi_debug)
 297                         (void) fprintf(stderr,
 298                             "Bad EFI CRC: 0x%x != 0x%x\n",
 299                             crc,
 300                             LE_32(efi_crc32((unsigned char *)efi,
 301                             sizeof (struct efi_gpt))));
 302                 return (VT_EINVAL);
 303         }
 304 
 305         return (0);
 306 }
 307 
 308 static int
 309 efi_read(int fd, struct dk_gpt *vtoc)
 310 {
 311         int                     i, j;
 312         int                     label_len;
 313         int                     rval = 0;
 314         int                     md_flag = 0;
 315         int                     vdc_flag = 0;
 316         struct dk_minfo         disk_info;
 317         dk_efi_t                dk_ioc;
 318         efi_gpt_t               *efi;
 319         efi_gpe_t               *efi_parts;
 320         struct dk_cinfo         dki_info;
 321         uint32_t                user_length;
 322         boolean_t               legacy_label = B_FALSE;
 323 
 324         /*
 325          * get the partition number for this file descriptor.
 326          */
 327         if (ioctl(fd, DKIOCINFO, (caddr_t)&dki_info) == -1) {
 328                 if (efi_debug) {
 329                         (void) fprintf(stderr, "DKIOCINFO errno 0x%x\n", errno);
 330                 }
 331                 switch (errno) {
 332                 case EIO:
 333                         return (VT_EIO);
 334                 case EINVAL:
 335                         return (VT_EINVAL);
 336                 default:
 337                         return (VT_ERROR);
 338                 }
 339         }
 340         if ((strncmp(dki_info.dki_cname, "pseudo", 7) == 0) &&
 341             (strncmp(dki_info.dki_dname, "md", 3) == 0)) {
 342                 md_flag++;
 343         } else if ((strncmp(dki_info.dki_cname, "vdc", 4) == 0) &&
 344             (strncmp(dki_info.dki_dname, "vdc", 4) == 0)) {
 345                 /*
 346                  * The controller and drive name "vdc" (virtual disk client)
 347                  * indicates a LDoms virtual disk.
 348                  */
 349                 vdc_flag++;
 350         }
 351 
 352         /* get the LBA size */
 353         if (ioctl(fd, DKIOCGMEDIAINFO, (caddr_t)&disk_info) == -1) {
 354                 if (efi_debug) {
 355                         (void) fprintf(stderr,
 356                             "assuming LBA 512 bytes %d\n",
 357                             errno);
 358                 }
 359                 disk_info.dki_lbsize = DEV_BSIZE;
 360         }
 361         if (disk_info.dki_lbsize == 0) {
 362                 if (efi_debug) {
 363                         (void) fprintf(stderr,
 364                             "efi_read: assuming LBA 512 bytes\n");
 365                 }
 366                 disk_info.dki_lbsize = DEV_BSIZE;
 367         }
 368         /*
 369          * Read the EFI GPT to figure out how many partitions we need
 370          * to deal with.
 371          */
 372         dk_ioc.dki_lba = 1;
 373         if (NBLOCKS(vtoc->efi_nparts, disk_info.dki_lbsize) < 34) {
 374                 label_len = EFI_MIN_ARRAY_SIZE + disk_info.dki_lbsize;
 375         } else {
 376                 label_len = vtoc->efi_nparts * (int) sizeof (efi_gpe_t) +
 377                     disk_info.dki_lbsize;
 378                 if (label_len % disk_info.dki_lbsize) {
 379                         /* pad to physical sector size */
 380                         label_len += disk_info.dki_lbsize;
 381                         label_len &= ~(disk_info.dki_lbsize - 1);
 382                 }
 383         }
 384 
 385         if ((dk_ioc.dki_data = calloc(label_len, 1)) == NULL)
 386                 return (VT_ERROR);
 387 
 388         dk_ioc.dki_length = disk_info.dki_lbsize;
 389         user_length = vtoc->efi_nparts;
 390         efi = dk_ioc.dki_data;
 391         if (md_flag) {
 392                 dk_ioc.dki_length = label_len;
 393                 if (efi_ioctl(fd, DKIOCGETEFI, &dk_ioc) == -1) {
 394                         switch (errno) {
 395                         case EIO:
 396                                 return (VT_EIO);
 397                         default:
 398                                 return (VT_ERROR);
 399                         }
 400                 }
 401         } else if ((rval = check_label(fd, &dk_ioc)) == VT_EINVAL) {
 402                 /*
 403                  * No valid label here; try the alternate. Note that here
 404                  * we just read GPT header and save it into dk_ioc.data,
 405                  * Later, we will read GUID partition entry array if we
 406                  * can get valid GPT header.
 407                  */
 408 
 409                 /*
 410                  * This is a workaround for legacy systems. In the past, the
 411                  * last sector of SCSI disk was invisible on x86 platform. At
 412                  * that time, backup label was saved on the next to the last
 413                  * sector. It is possible for users to move a disk from previous
 414                  * solaris system to present system. Here, we attempt to search
 415                  * legacy backup EFI label first.
 416                  */
 417                 dk_ioc.dki_lba = disk_info.dki_capacity - 2;
 418                 dk_ioc.dki_length = disk_info.dki_lbsize;
 419                 rval = check_label(fd, &dk_ioc);
 420                 if (rval == VT_EINVAL) {
 421                         /*
 422                          * we didn't find legacy backup EFI label, try to
 423                          * search backup EFI label in the last block.
 424                          */
 425                         dk_ioc.dki_lba = disk_info.dki_capacity - 1;
 426                         dk_ioc.dki_length = disk_info.dki_lbsize;
 427                         rval = check_label(fd, &dk_ioc);
 428                         if (rval == 0) {
 429                                 legacy_label = B_TRUE;
 430                                 if (efi_debug)
 431                                         (void) fprintf(stderr,
 432                                             "efi_read: primary label corrupt; "
 433                                             "using EFI backup label located on"
 434                                             " the last block\n");
 435                         }
 436                 } else {
 437                         if ((efi_debug) && (rval == 0))
 438                                 (void) fprintf(stderr, "efi_read: primary label"
 439                                     " corrupt; using legacy EFI backup label "
 440                                     " located on the next to last block\n");
 441                 }
 442 
 443                 if (rval == 0) {
 444                         dk_ioc.dki_lba = LE_64(efi->efi_gpt_PartitionEntryLBA);
 445                         vtoc->efi_flags |= EFI_GPT_PRIMARY_CORRUPT;
 446                         vtoc->efi_nparts =
 447                             LE_32(efi->efi_gpt_NumberOfPartitionEntries);
 448                         /*
 449                          * Partition tables are between backup GPT header
 450                          * table and ParitionEntryLBA (the starting LBA of
 451                          * the GUID partition entries array). Now that we
 452                          * already got valid GPT header and saved it in
 453                          * dk_ioc.dki_data, we try to get GUID partition
 454                          * entry array here.
 455                          */
 456                         /* LINTED */
 457                         dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data
 458                             + disk_info.dki_lbsize);
 459                         if (legacy_label)
 460                                 dk_ioc.dki_length = disk_info.dki_capacity - 1 -
 461                                     dk_ioc.dki_lba;
 462                         else
 463                                 dk_ioc.dki_length = disk_info.dki_capacity - 2 -
 464                                     dk_ioc.dki_lba;
 465                         dk_ioc.dki_length *= disk_info.dki_lbsize;
 466                         if (dk_ioc.dki_length >
 467                             ((len_t)label_len - sizeof (*dk_ioc.dki_data))) {
 468                                 rval = VT_EINVAL;
 469                         } else {
 470                                 /*
 471                                  * read GUID partition entry array
 472                                  */
 473                                 rval = efi_ioctl(fd, DKIOCGETEFI, &dk_ioc);
 474                         }
 475                 }
 476 
 477         } else if (rval == 0) {
 478 
 479                 dk_ioc.dki_lba = LE_64(efi->efi_gpt_PartitionEntryLBA);
 480                 /* LINTED */
 481                 dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data
 482                     + disk_info.dki_lbsize);
 483                 dk_ioc.dki_length = label_len - disk_info.dki_lbsize;
 484                 rval = efi_ioctl(fd, DKIOCGETEFI, &dk_ioc);
 485 
 486         } else if (vdc_flag && rval == VT_ERROR && errno == EINVAL) {
 487                 /*
 488                  * When the device is a LDoms virtual disk, the DKIOCGETEFI
 489                  * ioctl can fail with EINVAL if the virtual disk backend
 490                  * is a ZFS volume serviced by a domain running an old version
 491                  * of Solaris. This is because the DKIOCGETEFI ioctl was
 492                  * initially incorrectly implemented for a ZFS volume and it
 493                  * expected the GPT and GPE to be retrieved with a single ioctl.
 494                  * So we try to read the GPT and the GPE using that old style
 495                  * ioctl.
 496                  */
 497                 dk_ioc.dki_lba = 1;
 498                 dk_ioc.dki_length = label_len;
 499                 rval = check_label(fd, &dk_ioc);
 500         }
 501 
 502         if (rval < 0) {
 503                 free(efi);
 504                 return (rval);
 505         }
 506 
 507         /* LINTED -- always longlong aligned */
 508         efi_parts = (efi_gpe_t *)(((char *)efi) + disk_info.dki_lbsize);
 509 
 510         /*
 511          * Assemble this into a "dk_gpt" struct for easier
 512          * digestibility by applications.
 513          */
 514         vtoc->efi_version = LE_32(efi->efi_gpt_Revision);
 515         vtoc->efi_nparts = LE_32(efi->efi_gpt_NumberOfPartitionEntries);
 516         vtoc->efi_part_size = LE_32(efi->efi_gpt_SizeOfPartitionEntry);
 517         vtoc->efi_lbasize = disk_info.dki_lbsize;
 518         vtoc->efi_last_lba = disk_info.dki_capacity - 1;
 519         vtoc->efi_first_u_lba = LE_64(efi->efi_gpt_FirstUsableLBA);
 520         vtoc->efi_last_u_lba = LE_64(efi->efi_gpt_LastUsableLBA);
 521         vtoc->efi_altern_lba = LE_64(efi->efi_gpt_AlternateLBA);
 522         UUID_LE_CONVERT(vtoc->efi_disk_uguid, efi->efi_gpt_DiskGUID);
 523 
 524         /*
 525          * If the array the user passed in is too small, set the length
 526          * to what it needs to be and return
 527          */
 528         if (user_length < vtoc->efi_nparts) {
 529                 return (VT_EINVAL);
 530         }
 531 
 532         for (i = 0; i < vtoc->efi_nparts; i++) {
 533 
 534                 UUID_LE_CONVERT(vtoc->efi_parts[i].p_guid,
 535                     efi_parts[i].efi_gpe_PartitionTypeGUID);
 536 
 537                 for (j = 0;
 538                     j < sizeof (conversion_array)
 539                     / sizeof (struct uuid_to_ptag); j++) {
 540 
 541                         if (bcmp(&vtoc->efi_parts[i].p_guid,
 542                             &conversion_array[j].uuid,
 543                             sizeof (struct uuid)) == 0) {
 544                                 vtoc->efi_parts[i].p_tag = j;
 545                                 break;
 546                         }
 547                 }
 548                 if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED)
 549                         continue;
 550                 vtoc->efi_parts[i].p_flag =
 551                     LE_16(efi_parts[i].efi_gpe_Attributes.PartitionAttrs);
 552                 vtoc->efi_parts[i].p_start =
 553                     LE_64(efi_parts[i].efi_gpe_StartingLBA);
 554                 vtoc->efi_parts[i].p_size =
 555                     LE_64(efi_parts[i].efi_gpe_EndingLBA) -
 556                     vtoc->efi_parts[i].p_start + 1;
 557                 for (j = 0; j < EFI_PART_NAME_LEN; j++) {
 558                         vtoc->efi_parts[i].p_name[j] =
 559                             (uchar_t)LE_16(
 560                             efi_parts[i].efi_gpe_PartitionName[j]);
 561                 }
 562 
 563                 UUID_LE_CONVERT(vtoc->efi_parts[i].p_uguid,
 564                     efi_parts[i].efi_gpe_UniquePartitionGUID);
 565         }
 566         free(efi);
 567 
 568         return (dki_info.dki_partition);
 569 }
 570 
 571 /* writes a "protective" MBR */
 572 static int
 573 write_pmbr(int fd, struct dk_gpt *vtoc)
 574 {
 575         dk_efi_t        dk_ioc;
 576         struct mboot    mb;
 577         uchar_t         *cp;
 578         diskaddr_t      size_in_lba;
 579         uchar_t         *buf;
 580         int             len;
 581 
 582         len = (vtoc->efi_lbasize == 0) ? sizeof (mb) : vtoc->efi_lbasize;
 583         buf = calloc(len, 1);
 584 
 585         /*
 586          * Preserve any boot code and disk signature if the first block is
 587          * already an MBR.
 588          */
 589         dk_ioc.dki_lba = 0;
 590         dk_ioc.dki_length = len;
 591         /* LINTED -- always longlong aligned */
 592         dk_ioc.dki_data = (efi_gpt_t *)buf;
 593         if (efi_ioctl(fd, DKIOCGETEFI, &dk_ioc) == -1) {
 594                 (void *) memcpy(&mb, buf, sizeof (mb));
 595                 bzero(&mb, sizeof (mb));
 596                 mb.signature = LE_16(MBB_MAGIC);
 597         } else {
 598                 (void *) memcpy(&mb, buf, sizeof (mb));
 599                 if (mb.signature != LE_16(MBB_MAGIC)) {
 600                         bzero(&mb, sizeof (mb));
 601                         mb.signature = LE_16(MBB_MAGIC);
 602                 }
 603         }
 604 
 605         bzero(&mb.parts, sizeof (mb.parts));
 606         cp = (uchar_t *)&mb.parts[0];
 607         /* bootable or not */
 608         *cp++ = 0;
 609         /* beginning CHS; 0xffffff if not representable */
 610         *cp++ = 0xff;
 611         *cp++ = 0xff;
 612         *cp++ = 0xff;
 613         /* OS type */
 614         *cp++ = EFI_PMBR;
 615         /* ending CHS; 0xffffff if not representable */
 616         *cp++ = 0xff;
 617         *cp++ = 0xff;
 618         *cp++ = 0xff;
 619         /* starting LBA: 1 (little endian format) by EFI definition */
 620         *cp++ = 0x01;
 621         *cp++ = 0x00;
 622         *cp++ = 0x00;
 623         *cp++ = 0x00;
 624         /* ending LBA: last block on the disk (little endian format) */
 625         size_in_lba = vtoc->efi_last_lba;
 626         if (size_in_lba < 0xffffffff) {
 627                 *cp++ = (size_in_lba & 0x000000ff);
 628                 *cp++ = (size_in_lba & 0x0000ff00) >> 8;
 629                 *cp++ = (size_in_lba & 0x00ff0000) >> 16;
 630                 *cp++ = (size_in_lba & 0xff000000) >> 24;
 631         } else {
 632                 *cp++ = 0xff;
 633                 *cp++ = 0xff;
 634                 *cp++ = 0xff;
 635                 *cp++ = 0xff;
 636         }
 637 
 638         (void *) memcpy(buf, &mb, sizeof (mb));
 639         /* LINTED -- always longlong aligned */
 640         dk_ioc.dki_data = (efi_gpt_t *)buf;
 641         dk_ioc.dki_lba = 0;
 642         dk_ioc.dki_length = len;
 643         if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) {
 644                 free(buf);
 645                 switch (errno) {
 646                 case EIO:
 647                         return (VT_EIO);
 648                 case EINVAL:
 649                         return (VT_EINVAL);
 650                 default:
 651                         return (VT_ERROR);
 652                 }
 653         }
 654         free(buf);
 655         return (0);
 656 }
 657 
 658 /* make sure the user specified something reasonable */
 659 static int
 660 check_input(struct dk_gpt *vtoc)
 661 {
 662         int                     resv_part = -1;
 663         int                     i, j;
 664         diskaddr_t              istart, jstart, isize, jsize, endsect;
 665 
 666         /*
 667          * Sanity-check the input (make sure no partitions overlap)
 668          */
 669         for (i = 0; i < vtoc->efi_nparts; i++) {
 670                 /* It can't be unassigned and have an actual size */
 671                 if ((vtoc->efi_parts[i].p_tag == V_UNASSIGNED) &&
 672                     (vtoc->efi_parts[i].p_size != 0)) {
 673                         if (efi_debug) {
 674                                 (void) fprintf(stderr,
 675 "partition %d is \"unassigned\" but has a size of %llu",
 676                                     i,
 677                                     vtoc->efi_parts[i].p_size);
 678                         }
 679                         return (VT_EINVAL);
 680                 }
 681                 if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED) {
 682                         if (uuid_is_null((uchar_t *)&vtoc->efi_parts[i].p_guid))
 683                                 continue;
 684                         /* we have encountered an unknown uuid */
 685                         vtoc->efi_parts[i].p_tag = 0xff;
 686                 }
 687                 if (vtoc->efi_parts[i].p_tag == V_RESERVED) {
 688                         if (resv_part != -1) {
 689                                 if (efi_debug) {
 690                                         (void) fprintf(stderr,
 691 "found duplicate reserved partition at %d\n",
 692                                             i);
 693                                 }
 694                                 return (VT_EINVAL);
 695                         }
 696                         resv_part = i;
 697                 }
 698                 if ((vtoc->efi_parts[i].p_start < vtoc->efi_first_u_lba) ||
 699                     (vtoc->efi_parts[i].p_start > vtoc->efi_last_u_lba)) {
 700                         if (efi_debug) {
 701                                 (void) fprintf(stderr,
 702                                     "Partition %d starts at %llu.  ",
 703                                     i,
 704                                     vtoc->efi_parts[i].p_start);
 705                                 (void) fprintf(stderr,
 706                                     "It must be between %llu and %llu.\n",
 707                                     vtoc->efi_first_u_lba,
 708                                     vtoc->efi_last_u_lba);
 709                         }
 710                         return (VT_EINVAL);
 711                 }
 712                 if ((vtoc->efi_parts[i].p_start +
 713                     vtoc->efi_parts[i].p_size <
 714                     vtoc->efi_first_u_lba) ||
 715                     (vtoc->efi_parts[i].p_start +
 716                     vtoc->efi_parts[i].p_size >
 717                     vtoc->efi_last_u_lba + 1)) {
 718                         if (efi_debug) {
 719                                 (void) fprintf(stderr,
 720                                     "Partition %d ends at %llu.  ",
 721                                     i,
 722                                     vtoc->efi_parts[i].p_start +
 723                                     vtoc->efi_parts[i].p_size);
 724                                 (void) fprintf(stderr,
 725                                     "It must be between %llu and %llu.\n",
 726                                     vtoc->efi_first_u_lba,
 727                                     vtoc->efi_last_u_lba);
 728                         }
 729                         return (VT_EINVAL);
 730                 }
 731 
 732                 for (j = 0; j < vtoc->efi_nparts; j++) {
 733                         isize = vtoc->efi_parts[i].p_size;
 734                         jsize = vtoc->efi_parts[j].p_size;
 735                         istart = vtoc->efi_parts[i].p_start;
 736                         jstart = vtoc->efi_parts[j].p_start;
 737                         if ((i != j) && (isize != 0) && (jsize != 0)) {
 738                                 endsect = jstart + jsize -1;
 739                                 if ((jstart <= istart) &&
 740                                     (istart <= endsect)) {
 741                                         if (efi_debug) {
 742                                                 (void) fprintf(stderr,
 743 "Partition %d overlaps partition %d.",
 744                                                     i, j);
 745                                         }
 746                                         return (VT_EINVAL);
 747                                 }
 748                         }
 749                 }
 750         }
 751         /* just a warning for now */
 752         if ((resv_part == -1) && efi_debug) {
 753                 (void) fprintf(stderr,
 754                     "no reserved partition found\n");
 755         }
 756         return (0);
 757 }
 758 
 759 /*
 760  * add all the unallocated space to the current label
 761  */
 762 int
 763 efi_use_whole_disk(int fd)
 764 {
 765         struct dk_gpt           *efi_label;
 766         int                     rval;
 767         int                     i;
 768         uint_t                  phy_last_slice = 0;
 769         diskaddr_t              pl_start = 0;
 770         diskaddr_t              pl_size;
 771 
 772         rval = efi_alloc_and_read(fd, &efi_label);
 773         if (rval < 0) {
 774                 return (rval);
 775         }
 776 
 777         /* find the last physically non-zero partition */
 778         for (i = 0; i < efi_label->efi_nparts - 2; i ++) {
 779                 if (pl_start < efi_label->efi_parts[i].p_start) {
 780                         pl_start = efi_label->efi_parts[i].p_start;
 781                         phy_last_slice = i;
 782                 }
 783         }
 784         pl_size = efi_label->efi_parts[phy_last_slice].p_size;
 785 
 786         /*
 787          * If alter_lba is 1, we are using the backup label.
 788          * Since we can locate the backup label by disk capacity,
 789          * there must be no unallocated space.
 790          */
 791         if ((efi_label->efi_altern_lba == 1) || (efi_label->efi_altern_lba
 792             >= efi_label->efi_last_lba)) {
 793                 if (efi_debug) {
 794                         (void) fprintf(stderr,
 795                             "efi_use_whole_disk: requested space not found\n");
 796                 }
 797                 efi_free(efi_label);
 798                 return (VT_ENOSPC);
 799         }
 800 
 801         /*
 802          * If there is space between the last physically non-zero partition
 803          * and the reserved partition, just add the unallocated space to this
 804          * area. Otherwise, the unallocated space is added to the last
 805          * physically non-zero partition.
 806          */
 807         if (pl_start + pl_size - 1 == efi_label->efi_last_u_lba -
 808             EFI_MIN_RESV_SIZE) {
 809                 efi_label->efi_parts[phy_last_slice].p_size +=
 810                     efi_label->efi_last_lba - efi_label->efi_altern_lba;
 811         }
 812 
 813         /*
 814          * Move the reserved partition. There is currently no data in
 815          * here except fabricated devids (which get generated via
 816          * efi_write()). So there is no need to copy data.
 817          */
 818         efi_label->efi_parts[efi_label->efi_nparts - 1].p_start +=
 819             efi_label->efi_last_lba - efi_label->efi_altern_lba;
 820         efi_label->efi_last_u_lba += efi_label->efi_last_lba
 821             - efi_label->efi_altern_lba;
 822 
 823         rval = efi_write(fd, efi_label);
 824         if (rval < 0) {
 825                 if (efi_debug) {
 826                         (void) fprintf(stderr,
 827                             "efi_use_whole_disk:fail to write label, rval=%d\n",
 828                             rval);
 829                 }
 830                 efi_free(efi_label);
 831                 return (rval);
 832         }
 833 
 834         efi_free(efi_label);
 835         return (0);
 836 }
 837 
 838 
 839 /*
 840  * write EFI label and backup label
 841  */
 842 int
 843 efi_write(int fd, struct dk_gpt *vtoc)
 844 {
 845         dk_efi_t                dk_ioc;
 846         efi_gpt_t               *efi;
 847         efi_gpe_t               *efi_parts;
 848         int                     i, j;
 849         struct dk_cinfo         dki_info;
 850         int                     md_flag = 0;
 851         int                     nblocks;
 852         diskaddr_t              lba_backup_gpt_hdr;
 853 
 854         if (ioctl(fd, DKIOCINFO, (caddr_t)&dki_info) == -1) {
 855                 if (efi_debug)
 856                         (void) fprintf(stderr, "DKIOCINFO errno 0x%x\n", errno);
 857                 switch (errno) {
 858                 case EIO:
 859                         return (VT_EIO);
 860                 case EINVAL:
 861                         return (VT_EINVAL);
 862                 default:
 863                         return (VT_ERROR);
 864                 }
 865         }
 866 
 867         /* check if we are dealing wih a metadevice */
 868         if ((strncmp(dki_info.dki_cname, "pseudo", 7) == 0) &&
 869             (strncmp(dki_info.dki_dname, "md", 3) == 0)) {
 870                 md_flag = 1;
 871         }
 872 
 873         if (check_input(vtoc)) {
 874                 /*
 875                  * not valid; if it's a metadevice just pass it down
 876                  * because SVM will do its own checking
 877                  */
 878                 if (md_flag == 0) {
 879                         return (VT_EINVAL);
 880                 }
 881         }
 882 
 883         dk_ioc.dki_lba = 1;
 884         if (NBLOCKS(vtoc->efi_nparts, vtoc->efi_lbasize) < 34) {
 885                 dk_ioc.dki_length = EFI_MIN_ARRAY_SIZE + vtoc->efi_lbasize;
 886         } else {
 887                 dk_ioc.dki_length = NBLOCKS(vtoc->efi_nparts,
 888                     vtoc->efi_lbasize) *
 889                     vtoc->efi_lbasize;
 890         }
 891 
 892         /*
 893          * the number of blocks occupied by GUID partition entry array
 894          */
 895         nblocks = dk_ioc.dki_length / vtoc->efi_lbasize - 1;
 896 
 897         /*
 898          * Backup GPT header is located on the block after GUID
 899          * partition entry array. Here, we calculate the address
 900          * for backup GPT header.
 901          */
 902         lba_backup_gpt_hdr = vtoc->efi_last_u_lba + 1 + nblocks;
 903         if ((dk_ioc.dki_data = calloc(dk_ioc.dki_length, 1)) == NULL)
 904                 return (VT_ERROR);
 905 
 906         efi = dk_ioc.dki_data;
 907 
 908         /* stuff user's input into EFI struct */
 909         efi->efi_gpt_Signature = LE_64(EFI_SIGNATURE);
 910         efi->efi_gpt_Revision = LE_32(vtoc->efi_version); /* 0x02000100 */
 911         efi->efi_gpt_HeaderSize = LE_32(sizeof (struct efi_gpt));
 912         efi->efi_gpt_Reserved1 = 0;
 913         efi->efi_gpt_MyLBA = LE_64(1ULL);
 914         efi->efi_gpt_AlternateLBA = LE_64(lba_backup_gpt_hdr);
 915         efi->efi_gpt_FirstUsableLBA = LE_64(vtoc->efi_first_u_lba);
 916         efi->efi_gpt_LastUsableLBA = LE_64(vtoc->efi_last_u_lba);
 917         efi->efi_gpt_PartitionEntryLBA = LE_64(2ULL);
 918         efi->efi_gpt_NumberOfPartitionEntries = LE_32(vtoc->efi_nparts);
 919         efi->efi_gpt_SizeOfPartitionEntry = LE_32(sizeof (struct efi_gpe));
 920         UUID_LE_CONVERT(efi->efi_gpt_DiskGUID, vtoc->efi_disk_uguid);
 921 
 922         /* LINTED -- always longlong aligned */
 923         efi_parts = (efi_gpe_t *)((char *)dk_ioc.dki_data + vtoc->efi_lbasize);
 924 
 925         for (i = 0; i < vtoc->efi_nparts; i++) {
 926                 for (j = 0;
 927                     j < sizeof (conversion_array) /
 928                     sizeof (struct uuid_to_ptag); j++) {
 929 
 930                         if (vtoc->efi_parts[i].p_tag == j) {
 931                                 UUID_LE_CONVERT(
 932                                     efi_parts[i].efi_gpe_PartitionTypeGUID,
 933                                     conversion_array[j].uuid);
 934                                 break;
 935                         }
 936                 }
 937 
 938                 if (j == sizeof (conversion_array) /
 939                     sizeof (struct uuid_to_ptag)) {
 940                         /*
 941                          * If we didn't have a matching uuid match, bail here.
 942                          * Don't write a label with unknown uuid.
 943                          */
 944                         if (efi_debug) {
 945                                 (void) fprintf(stderr,
 946                                     "Unknown uuid for p_tag %d\n",
 947                                     vtoc->efi_parts[i].p_tag);
 948                         }
 949                         return (VT_EINVAL);
 950                 }
 951 
 952                 efi_parts[i].efi_gpe_StartingLBA =
 953                     LE_64(vtoc->efi_parts[i].p_start);
 954                 efi_parts[i].efi_gpe_EndingLBA =
 955                     LE_64(vtoc->efi_parts[i].p_start +
 956                     vtoc->efi_parts[i].p_size - 1);
 957                 efi_parts[i].efi_gpe_Attributes.PartitionAttrs =
 958                     LE_16(vtoc->efi_parts[i].p_flag);
 959                 for (j = 0; j < EFI_PART_NAME_LEN; j++) {
 960                         efi_parts[i].efi_gpe_PartitionName[j] =
 961                             LE_16((ushort_t)vtoc->efi_parts[i].p_name[j]);
 962                 }
 963                 if ((vtoc->efi_parts[i].p_tag != V_UNASSIGNED) &&
 964                     uuid_is_null((uchar_t *)&vtoc->efi_parts[i].p_uguid)) {
 965                         (void) uuid_generate((uchar_t *)
 966                             &vtoc->efi_parts[i].p_uguid);
 967                 }
 968                 bcopy(&vtoc->efi_parts[i].p_uguid,
 969                     &efi_parts[i].efi_gpe_UniquePartitionGUID,
 970                     sizeof (uuid_t));
 971         }
 972         efi->efi_gpt_PartitionEntryArrayCRC32 =
 973             LE_32(efi_crc32((unsigned char *)efi_parts,
 974             vtoc->efi_nparts * (int)sizeof (struct efi_gpe)));
 975         efi->efi_gpt_HeaderCRC32 =
 976             LE_32(efi_crc32((unsigned char *)efi, sizeof (struct efi_gpt)));
 977 
 978         if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) {
 979                 free(dk_ioc.dki_data);
 980                 switch (errno) {
 981                 case EIO:
 982                         return (VT_EIO);
 983                 case EINVAL:
 984                         return (VT_EINVAL);
 985                 default:
 986                         return (VT_ERROR);
 987                 }
 988         }
 989         /* if it's a metadevice we're done */
 990         if (md_flag) {
 991                 free(dk_ioc.dki_data);
 992                 return (0);
 993         }
 994 
 995         /* write backup partition array */
 996         dk_ioc.dki_lba = vtoc->efi_last_u_lba + 1;
 997         dk_ioc.dki_length -= vtoc->efi_lbasize;
 998         /* LINTED */
 999         dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data +
1000             vtoc->efi_lbasize);
1001 
1002         if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) {
1003                 /*
1004                  * we wrote the primary label okay, so don't fail
1005                  */
1006                 if (efi_debug) {
1007                         (void) fprintf(stderr,
1008                             "write of backup partitions to block %llu "
1009                             "failed, errno %d\n",
1010                             vtoc->efi_last_u_lba + 1,
1011                             errno);
1012                 }
1013         }
1014         /*
1015          * now swap MyLBA and AlternateLBA fields and write backup
1016          * partition table header
1017          */
1018         dk_ioc.dki_lba = lba_backup_gpt_hdr;
1019         dk_ioc.dki_length = vtoc->efi_lbasize;
1020         /* LINTED */
1021         dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data -
1022             vtoc->efi_lbasize);
1023         efi->efi_gpt_AlternateLBA = LE_64(1ULL);
1024         efi->efi_gpt_MyLBA = LE_64(lba_backup_gpt_hdr);
1025         efi->efi_gpt_PartitionEntryLBA = LE_64(vtoc->efi_last_u_lba + 1);
1026         efi->efi_gpt_HeaderCRC32 = 0;
1027         efi->efi_gpt_HeaderCRC32 =
1028             LE_32(efi_crc32((unsigned char *)dk_ioc.dki_data,
1029             sizeof (struct efi_gpt)));
1030 
1031         if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) {
1032                 if (efi_debug) {
1033                         (void) fprintf(stderr,
1034                             "write of backup header to block %llu failed, "
1035                             "errno %d\n",
1036                             lba_backup_gpt_hdr,
1037                             errno);
1038                 }
1039         }
1040         /* write the PMBR */
1041         (void) write_pmbr(fd, vtoc);
1042         free(dk_ioc.dki_data);
1043         return (0);
1044 }
1045 
1046 void
1047 efi_free(struct dk_gpt *ptr)
1048 {
1049         free(ptr);
1050 }
1051 
1052 /*
1053  * Input: File descriptor
1054  * Output: 1 if disk has an EFI label, or > 2TB with no VTOC or legacy MBR.
1055  * Otherwise 0.
1056  */
1057 int
1058 efi_type(int fd)
1059 {
1060         struct vtoc vtoc;
1061         struct extvtoc extvtoc;
1062 
1063         if (ioctl(fd, DKIOCGEXTVTOC, &extvtoc) == -1) {
1064                 if (errno == ENOTSUP)
1065                         return (1);
1066                 else if (errno == ENOTTY) {
1067                         if (ioctl(fd, DKIOCGVTOC, &vtoc) == -1)
1068                                 if (errno == ENOTSUP)
1069                                         return (1);
1070                 }
1071         }
1072         return (0);
1073 }
1074 
1075 void
1076 efi_err_check(struct dk_gpt *vtoc)
1077 {
1078         int                     resv_part = -1;
1079         int                     i, j;
1080         diskaddr_t              istart, jstart, isize, jsize, endsect;
1081         int                     overlap = 0;
1082 
1083         /*
1084          * make sure no partitions overlap
1085          */
1086         for (i = 0; i < vtoc->efi_nparts; i++) {
1087                 /* It can't be unassigned and have an actual size */
1088                 if ((vtoc->efi_parts[i].p_tag == V_UNASSIGNED) &&
1089                     (vtoc->efi_parts[i].p_size != 0)) {
1090                         (void) fprintf(stderr,
1091                             "partition %d is \"unassigned\" but has a size "
1092                             "of %llu\n", i, vtoc->efi_parts[i].p_size);
1093                 }
1094                 if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED) {
1095                         continue;
1096                 }
1097                 if (vtoc->efi_parts[i].p_tag == V_RESERVED) {
1098                         if (resv_part != -1) {
1099                                 (void) fprintf(stderr,
1100                                     "found duplicate reserved partition at "
1101                                     "%d\n", i);
1102                         }
1103                         resv_part = i;
1104                         if (vtoc->efi_parts[i].p_size != EFI_MIN_RESV_SIZE)
1105                                 (void) fprintf(stderr,
1106                                     "Warning: reserved partition size must "
1107                                     "be %d sectors\n", EFI_MIN_RESV_SIZE);
1108                 }
1109                 if ((vtoc->efi_parts[i].p_start < vtoc->efi_first_u_lba) ||
1110                     (vtoc->efi_parts[i].p_start > vtoc->efi_last_u_lba)) {
1111                         (void) fprintf(stderr,
1112                             "Partition %d starts at %llu\n",
1113                             i,
1114                             vtoc->efi_parts[i].p_start);
1115                         (void) fprintf(stderr,
1116                             "It must be between %llu and %llu.\n",
1117                             vtoc->efi_first_u_lba,
1118                             vtoc->efi_last_u_lba);
1119                 }
1120                 if ((vtoc->efi_parts[i].p_start +
1121                     vtoc->efi_parts[i].p_size <
1122                     vtoc->efi_first_u_lba) ||
1123                     (vtoc->efi_parts[i].p_start +
1124                     vtoc->efi_parts[i].p_size >
1125                     vtoc->efi_last_u_lba + 1)) {
1126                         (void) fprintf(stderr,
1127                             "Partition %d ends at %llu\n",
1128                             i,
1129                             vtoc->efi_parts[i].p_start +
1130                             vtoc->efi_parts[i].p_size);
1131                         (void) fprintf(stderr,
1132                             "It must be between %llu and %llu.\n",
1133                             vtoc->efi_first_u_lba,
1134                             vtoc->efi_last_u_lba);
1135                 }
1136 
1137                 for (j = 0; j < vtoc->efi_nparts; j++) {
1138                         isize = vtoc->efi_parts[i].p_size;
1139                         jsize = vtoc->efi_parts[j].p_size;
1140                         istart = vtoc->efi_parts[i].p_start;
1141                         jstart = vtoc->efi_parts[j].p_start;
1142                         if ((i != j) && (isize != 0) && (jsize != 0)) {
1143                                 endsect = jstart + jsize -1;
1144                                 if ((jstart <= istart) &&
1145                                     (istart <= endsect)) {
1146                                         if (!overlap) {
1147                                         (void) fprintf(stderr,
1148                                             "label error: EFI Labels do not "
1149                                             "support overlapping partitions\n");
1150                                         }
1151                                         (void) fprintf(stderr,
1152                                             "Partition %d overlaps partition "
1153                                             "%d.\n", i, j);
1154                                         overlap = 1;
1155                                 }
1156                         }
1157                 }
1158         }
1159         /* make sure there is a reserved partition */
1160         if (resv_part == -1) {
1161                 (void) fprintf(stderr,
1162                     "no reserved partition found\n");
1163         }
1164 }
1165 
1166 /*
1167  * We need to get information necessary to construct a *new* efi
1168  * label type
1169  */
1170 int
1171 efi_auto_sense(int fd, struct dk_gpt **vtoc)
1172 {
1173 
1174         int     i;
1175 
1176         /*
1177          * Now build the default partition table
1178          */
1179         if (efi_alloc_and_init(fd, EFI_NUMPAR, vtoc) != 0) {
1180                 if (efi_debug) {
1181                         (void) fprintf(stderr, "efi_alloc_and_init failed.\n");
1182                 }
1183                 return (-1);
1184         }
1185 
1186         for (i = 0; i < min((*vtoc)->efi_nparts, V_NUMPAR); i++) {
1187                 (*vtoc)->efi_parts[i].p_tag = default_vtoc_map[i].p_tag;
1188                 (*vtoc)->efi_parts[i].p_flag = default_vtoc_map[i].p_flag;
1189                 (*vtoc)->efi_parts[i].p_start = 0;
1190                 (*vtoc)->efi_parts[i].p_size = 0;
1191         }
1192         /*
1193          * Make constants first
1194          * and variable partitions later
1195          */
1196 
1197         /* root partition - s0 128 MB */
1198         (*vtoc)->efi_parts[0].p_start = 34;
1199         (*vtoc)->efi_parts[0].p_size = 262144;
1200 
1201         /* partition - s1  128 MB */
1202         (*vtoc)->efi_parts[1].p_start = 262178;
1203         (*vtoc)->efi_parts[1].p_size = 262144;
1204 
1205         /* partition -s2 is NOT the Backup disk */
1206         (*vtoc)->efi_parts[2].p_tag = V_UNASSIGNED;
1207 
1208         /* partition -s6 /usr partition - HOG */
1209         (*vtoc)->efi_parts[6].p_start = 524322;
1210         (*vtoc)->efi_parts[6].p_size = (*vtoc)->efi_last_u_lba - 524322
1211             - (1024 * 16);
1212 
1213         /* efi reserved partition - s9 16K */
1214         (*vtoc)->efi_parts[8].p_start = (*vtoc)->efi_last_u_lba - (1024 * 16);
1215         (*vtoc)->efi_parts[8].p_size = (1024 * 16);
1216         (*vtoc)->efi_parts[8].p_tag = V_RESERVED;
1217         return (0);
1218 }