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 (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  */
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <errno.h>
  29 #include <strings.h>
  30 #include <unistd.h>
  31 #include <uuid/uuid.h>
  32 #include <zlib.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 #if defined(__linux__)
  43 #include <linux/fs.h>
  44 #endif
  45
  46 static struct uuid_to_ptag {
  47         struct uuid     uuid;
  48 } conversion_array[] = {
  49         { EFI_UNUSED },
  50         { EFI_BOOT },
  51         { EFI_ROOT },
  52         { EFI_SWAP },
  53         { EFI_USR },
  54         { EFI_BACKUP },
  55         { EFI_UNUSED },         /* STAND is never used */
  56         { EFI_VAR },
  57         { EFI_HOME },
  58         { EFI_ALTSCTR },
  59         { EFI_UNUSED },         /* CACHE (cachefs) is never used */
  60         { EFI_RESERVED },
  61         { EFI_SYSTEM },
  62         { EFI_LEGACY_MBR },
  63         { EFI_SYMC_PUB },
  64         { EFI_SYMC_CDS },
  65         { EFI_MSFT_RESV },
  66         { EFI_DELL_BASIC },
  67         { EFI_DELL_RAID },
  68         { EFI_DELL_SWAP },
  69         { EFI_DELL_LVM },
  70         { EFI_DELL_RESV },
  71         { EFI_AAPL_HFS },
  72         { EFI_AAPL_UFS }
  73 };
  74
  75 /*
  76  * Default vtoc information for non-SVr4 partitions
  77  */
  78 struct dk_map2  default_vtoc_map[NDKMAP] = {
  79         {       V_ROOT,         0       },              /* a - 0 */
  80         {       V_SWAP,         V_UNMNT },              /* b - 1 */
  81         {       V_BACKUP,       V_UNMNT },              /* c - 2 */
  82         {       V_UNASSIGNED,   0       },              /* d - 3 */
  83         {       V_UNASSIGNED,   0       },              /* e - 4 */
  84         {       V_UNASSIGNED,   0       },              /* f - 5 */
  85         {       V_USR,          0       },              /* g - 6 */
  86         {       V_UNASSIGNED,   0       },              /* h - 7 */
  87
  88 #if defined(_SUNOS_VTOC_16)
  89
  90 #if defined(i386) || defined(__amd64)
  91         {       V_BOOT,         V_UNMNT },              /* i - 8 */
  92         {       V_ALTSCTR,      0       },              /* j - 9 */
  93
  94 #else
  95 #error No VTOC format defined.
  96 #endif                  /* defined(i386) */
  97
  98         {       V_UNASSIGNED,   0       },              /* k - 10 */
  99         {       V_UNASSIGNED,   0       },              /* l - 11 */
 100         {       V_UNASSIGNED,   0       },              /* m - 12 */
 101         {       V_UNASSIGNED,   0       },              /* n - 13 */
 102         {       V_UNASSIGNED,   0       },              /* o - 14 */
 103         {       V_UNASSIGNED,   0       },              /* p - 15 */
 104 #endif                  /* defined(_SUNOS_VTOC_16) */
 105 };
 106
 107 #ifdef DEBUG
 108 int efi_debug = 1;
 109 #else
 110 int efi_debug = 0;
 111 #endif
 112
 113 static int efi_read(int, struct dk_gpt *);
 114
 115 /*
 116  * Return a 32-bit CRC of the contents of the buffer.  Pre-and-post
 117  * one's conditioning will be handled by crc32() internally.
 118  */
 119 static uint32_t
 120 efi_crc32(const unsigned char *buf, unsigned int size)
 121 {
 122         uint32_t crc = crc32(0, Z_NULL, 0);
 123
 124         crc = crc32(crc, buf, size);
 125
 126         return (crc);
 127 }
 128
 129 static int
 130 read_disk_info(int fd, diskaddr_t *capacity, uint_t *lbsize)
 131 {
 132         int sector_size;
 133         unsigned long long capacity_size;
 134
 135         if (ioctl(fd, BLKSSZGET, &sector_size) < 0)
 136                 return (-1);
 137
 138         if (ioctl(fd, BLKGETSIZE64, &capacity_size) < 0)
 139                 return (-1);
 140
 141         *lbsize = (uint_t)sector_size;
 142         *capacity = (diskaddr_t)(capacity_size / sector_size);
 143
 144         return (0);
 145 }
 146
 147 static int
 148 efi_get_info(int fd, struct dk_cinfo *dki_info)
 149 {
 150 #if defined(__linux__)
 151         char *path;
 152         char *dev_path;
 153         int rval = 0;
 154
 155         memset(dki_info, 0, sizeof(*dki_info));
 156
 157         path = calloc(PATH_MAX, 1);
 158         if (path == NULL)
 159                 goto error;
 160
 161         /*
 162          * The simplest way to get the partition number under linux is
 163          * to parse it out of the /dev/<disk><parition> block device name.
 164          * The kernel creates this using the partition number when it
 165          * populates /dev/ so it may be trusted.  The tricky bit here is
 166          * that the naming convention is based on the block device type.
 167          * So we need to take this in to account when parsing out the
 168          * partition information.  Another issue is that the libefi API
 169          * API only provides the open fd and not the file path.  To handle
 170          * this realpath(3) is used to resolve the block device name from
 171          * /proc/self/fd/<fd>.  Aside from the partition number we collect
 172          * some additional device info.
 173          */
 174         (void) sprintf(path, "/proc/self/fd/%d", fd);
 175         dev_path = realpath(path, NULL);
 176         free(path);
 177
 178         if (dev_path == NULL)
 179                 goto error;
 180
 181         if ((strncmp(dev_path, "/dev/sd", 7) == 0)) {
 182                 strcpy(dki_info->dki_cname, "sd");
 183                 dki_info->dki_ctype = DKC_SCSI_CCS;
 184                 rval = sscanf(dev_path, "/dev/%[a-zA-Z]%hu",
 185                               dki_info->dki_dname,
 186                               &dki_info->dki_partition);
 187         } else if ((strncmp(dev_path, "/dev/hd", 7) == 0)) {
 188                 strcpy(dki_info->dki_cname, "hd");
 189                 dki_info->dki_ctype = DKC_DIRECT;
 190                 rval = sscanf(dev_path, "/dev/%[a-zA-Z]%hu",
 191                               dki_info->dki_dname,
 192                               &dki_info->dki_partition);
 193         } else if ((strncmp(dev_path, "/dev/md", 7) == 0)) {
 194                 strcpy(dki_info->dki_cname, "pseudo");
 195                 dki_info->dki_ctype = DKC_MD;
 196                 rval = sscanf(dev_path, "/dev/%[a-zA-Z0-9]p%hu",
 197                               dki_info->dki_dname,
 198                               &dki_info->dki_partition);
 199         } else if ((strncmp(dev_path, "/dev/dm-", 8) == 0)) {
 200                 strcpy(dki_info->dki_cname, "pseudo");
 201                 dki_info->dki_ctype = DKC_VBD;
 202                 rval = sscanf(dev_path, "/dev/%[a-zA-Z0-9-]p%hu",
 203                               dki_info->dki_dname,
 204                               &dki_info->dki_partition);
 205         } else if ((strncmp(dev_path, "/dev/ram", 8) == 0)) {
 206                 strcpy(dki_info->dki_cname, "pseudo");
 207                 dki_info->dki_ctype = DKC_PCMCIA_MEM;
 208                 rval = sscanf(dev_path, "/dev/%[a-zA-Z0-9]p%hu",
 209                               dki_info->dki_dname,
 210                               &dki_info->dki_partition);
 211         } else if ((strncmp(dev_path, "/dev/loop", 9) == 0)) {
 212                 strcpy(dki_info->dki_cname, "pseudo");
 213                 dki_info->dki_ctype = DKC_VBD;
 214                 rval = sscanf(dev_path, "/dev/%[a-zA-Z0-9]p%hu",
 215                               dki_info->dki_dname,
 216                               &dki_info->dki_partition);
 217         } else {
 218                 strcpy(dki_info->dki_dname, "unknown");
 219                 strcpy(dki_info->dki_cname, "unknown");
 220                 dki_info->dki_ctype = DKC_UNKNOWN;
 221         }
 222
 223         switch (rval) {
 224         case 0:
 225                 errno = EINVAL;
 226                 goto error;
 227         case 1:
 228                 dki_info->dki_partition = 0;
 229         }
 230
 231         free(dev_path);
 232 #else
 233         if (ioctl(fd, DKIOCINFO, (caddr_t)dki_info) == -1)
 234                 goto error;
 235 #endif
 236         return (0);
 237 error:
 238         if (efi_debug)
 239                 (void) fprintf(stderr, "DKIOCINFO errno 0x%x\n", errno);
 240
 241         switch (errno) {
 242         case EIO:
 243                 return (VT_EIO);
 244         case EINVAL:
 245                 return (VT_EINVAL);
 246         default:
 247                 return (VT_ERROR);
 248         }
 249 }
 250
 251 /*
 252  * the number of blocks the EFI label takes up (round up to nearest
 253  * block)
 254  */
 255 #define NBLOCKS(p, l)   (1 + ((((p) * (int)sizeof (efi_gpe_t))  + \
 256                                 ((l) - 1)) / (l)))
 257 /* number of partitions -- limited by what we can malloc */
 258 #define MAX_PARTS       ((4294967295UL - sizeof (struct dk_gpt)) / \
 259                             sizeof (struct dk_part))
 260
 261 int
 262 efi_alloc_and_init(int fd, uint32_t nparts, struct dk_gpt **vtoc)
 263 {
 264         diskaddr_t      capacity = 0;
 265         uint_t          lbsize = 0;
 266         uint_t          nblocks;
 267         size_t          length;
 268         struct dk_gpt   *vptr;
 269         struct uuid     uuid;
 270         struct dk_cinfo dki_info;
 271
 272         if (read_disk_info(fd, &capacity, &lbsize) != 0)
 273                 return (-1);
 274
 275 #if defined(__linux__)
 276         if (efi_get_info(fd, &dki_info) != 0)
 277                 return (-1);
 278
 279         if (dki_info.dki_partition != 0)
 280                 return (-1);
 281
 282         if ((dki_info.dki_ctype == DKC_PCMCIA_MEM) ||
 283             (dki_info.dki_ctype == DKC_VBD) ||
 284             (dki_info.dki_ctype == DKC_UNKNOWN))
 285                 return (-1);
 286 #endif
 287
 288         nblocks = NBLOCKS(nparts, lbsize);
 289         if ((nblocks * lbsize) < EFI_MIN_ARRAY_SIZE + lbsize) {
 290                 /* 16K plus one block for the GPT */
 291                 nblocks = EFI_MIN_ARRAY_SIZE / lbsize + 1;
 292         }
 293
 294         if (nparts > MAX_PARTS) {
 295                 if (efi_debug) {
 296                         (void) fprintf(stderr,
 297                         "the maximum number of partitions supported is %lu\n",
 298                             MAX_PARTS);
 299                 }
 300                 return (-1);
 301         }
 302
 303         length = sizeof (struct dk_gpt) +
 304             sizeof (struct dk_part) * (nparts - 1);
 305
 306         if ((*vtoc = calloc(length, 1)) == NULL)
 307                 return (-1);
 308
 309         vptr = *vtoc;
 310
 311         vptr->efi_version = EFI_VERSION_CURRENT;
 312         vptr->efi_lbasize = lbsize;
 313         vptr->efi_nparts = nparts;
 314         /*
 315          * add one block here for the PMBR; on disks with a 512 byte
 316          * block size and 128 or fewer partitions, efi_first_u_lba
 317          * should work out to "34"
 318          */
 319         vptr->efi_first_u_lba = nblocks + 1;
 320         vptr->efi_last_lba = capacity - 1;
 321         vptr->efi_altern_lba = capacity -1;
 322         vptr->efi_last_u_lba = vptr->efi_last_lba - nblocks;
 323
 324         (void) uuid_generate((uchar_t *)&uuid);
 325         UUID_LE_CONVERT(vptr->efi_disk_uguid, uuid);
 326         return (0);
 327 }
 328
 329 /*
 330  * Read EFI - return partition number upon success.
 331  */
 332 int
 333 efi_alloc_and_read(int fd, struct dk_gpt **vtoc)
 334 {
 335         int                     rval;
 336         uint32_t                nparts;
 337         int                     length;
 338
 339         /* figure out the number of entries that would fit into 16K */
 340         nparts = EFI_MIN_ARRAY_SIZE / sizeof (efi_gpe_t);
 341         length = (int) sizeof (struct dk_gpt) +
 342             (int) sizeof (struct dk_part) * (nparts - 1);
 343         if ((*vtoc = calloc(length, 1)) == NULL)
 344                 return (VT_ERROR);
 345
 346         (*vtoc)->efi_nparts = nparts;
 347         rval = efi_read(fd, *vtoc);
 348
 349         if ((rval == VT_EINVAL) && (*vtoc)->efi_nparts > nparts) {
 350                 void *tmp;
 351                 length = (int) sizeof (struct dk_gpt) +
 352                     (int) sizeof (struct dk_part) *
 353                     ((*vtoc)->efi_nparts - 1);
 354                 nparts = (*vtoc)->efi_nparts;
 355                 if ((tmp = realloc(*vtoc, length)) == NULL) {
 356                         free (*vtoc);
 357                         *vtoc = NULL;
 358                         return (VT_ERROR);
 359                 } else {
 360                         *vtoc = tmp;
 361                         rval = efi_read(fd, *vtoc);
 362                 }
 363         }
 364
 365         if (rval < 0) {
 366                 if (efi_debug) {
 367                         (void) fprintf(stderr,
 368                             "read of EFI table failed, rval=%d\n", rval);
 369                 }
 370                 free (*vtoc);
 371                 *vtoc = NULL;
 372         }
 373
 374         return (rval);
 375 }
 376
 377 static int
 378 efi_ioctl(int fd, int cmd, dk_efi_t *dk_ioc)
 379 {
 380         void *data = dk_ioc->dki_data;
 381         int error;
 382 #if defined(__linux__)
 383         diskaddr_t capacity;
 384         uint_t lbsize;
 385
 386         /*
 387          * When the IO is not being performed in kernel as an ioctl we need
 388          * to know the sector size so we can seek to the proper byte offset.
 389          */
 390         if (read_disk_info(fd, &capacity, &lbsize) == -1) {
 391                 if (efi_debug)
 392                         fprintf(stderr,"unable to read disk info: %d",errno);
 393
 394                 errno = EIO;
 395                 return -1;
 396         }
 397
 398         switch (cmd) {
 399         case DKIOCGETEFI:
 400                 if (lbsize == 0) {
 401                         if (efi_debug)
 402                                 (void) fprintf(stderr, "DKIOCGETEFI assuming "
 403                                                "LBA %d bytes\n", DEV_BSIZE);
 404
 405                         lbsize = DEV_BSIZE;
 406                 }
 407
 408                 error = lseek(fd, dk_ioc->dki_lba * lbsize, SEEK_SET);
 409                 if (error == -1) {
 410                         if (efi_debug)
 411                                 (void) fprintf(stderr, "DKIOCGETEFI lseek "
 412                                                "error: %d\n", errno);
 413                         return error;
 414                 }
 415
 416                 error = read(fd, data, dk_ioc->dki_length);
 417                 if (error == -1) {
 418                         if (efi_debug)
 419                                 (void) fprintf(stderr, "DKIOCGETEFI read "
 420                                                "error: %d\n", errno);
 421                         return error;
 422                 }
 423
 424                 if (error != dk_ioc->dki_length) {
 425                         if (efi_debug)
 426                                 (void) fprintf(stderr, "DKIOCGETEFI short "
 427                                                "read of %d bytes\n", error);
 428                         errno = EIO;
 429                         return -1;
 430                 }
 431                 error = 0;
 432                 break;
 433
 434         case DKIOCSETEFI:
 435                 if (lbsize == 0) {
 436                         if (efi_debug)
 437                                 (void) fprintf(stderr, "DKIOCSETEFI unknown "
 438                                                "LBA size\n");
 439                         errno = EIO;
 440                         return -1;
 441                 }
 442
 443                 error = lseek(fd, dk_ioc->dki_lba * lbsize, SEEK_SET);
 444                 if (error == -1) {
 445                         if (efi_debug)
 446                                 (void) fprintf(stderr, "DKIOCSETEFI lseek "
 447                                                "error: %d\n", errno);
 448                         return error;
 449                 }
 450
 451                 error = write(fd, data, dk_ioc->dki_length);
 452                 if (error == -1) {
 453                         if (efi_debug)
 454                                 (void) fprintf(stderr, "DKIOCSETEFI write "
 455                                                "error: %d\n", errno);
 456                         return error;
 457                 }
 458
 459                 if (error != dk_ioc->dki_length) {
 460                         if (efi_debug)
 461                                 (void) fprintf(stderr, "DKIOCSETEFI short "
 462                                                "write of %d bytes\n", error);
 463                         errno = EIO;
 464                         return -1;
 465                 }
 466
 467                 /* Sync the new EFI table to disk */
 468                 error = fsync(fd);
 469                 if (error == -1)
 470                         return error;
 471
 472                 /* Ensure any local disk cache is also flushed */
 473                 if (ioctl(fd, BLKFLSBUF, 0) == -1)
 474                         return error;
 475
 476                 error = 0;
 477                 break;
 478
 479         default:
 480                 if (efi_debug)
 481                         (void) fprintf(stderr, "unsupported ioctl()\n");
 482
 483                 errno = EIO;
 484                 return -1;
 485         }
 486 #else
 487         dk_ioc->dki_data_64 = (uint64_t)(uintptr_t)data;
 488         error = ioctl(fd, cmd, (void *)dk_ioc);
 489         dk_ioc->dki_data = data;
 490 #endif
 491         return (error);
 492 }
 493
 494 #if defined(__linux__)
 495 static int
 496 efi_rescan(int fd)
 497 {
 498         int retry = 5;
 499         int error;
 500
 501         /* Notify the kernel a devices partition table has been updated */
 502         while ((error = ioctl(fd, BLKRRPART)) != 0) {
 503                 if (--retry == 0) {
 504                         (void) fprintf(stderr, "the kernel failed to rescan "
 505                                        "the partition table: %d\n", errno);
 506                         return (-1);
 507                 }
 508         }
 509
 510         return (0);
 511 }
 512 #endif
 513
 514 static int
 515 check_label(int fd, dk_efi_t *dk_ioc)
 516 {
 517         efi_gpt_t               *efi;
 518         uint_t                  crc;
 519
 520         if (efi_ioctl(fd, DKIOCGETEFI, dk_ioc) == -1) {
 521                 switch (errno) {
 522                 case EIO:
 523                         return (VT_EIO);
 524                 default:
 525                         return (VT_ERROR);
 526                 }
 527         }
 528         efi = dk_ioc->dki_data;
 529         if (efi->efi_gpt_Signature != LE_64(EFI_SIGNATURE)) {
 530                 if (efi_debug)
 531                         (void) fprintf(stderr,
 532                             "Bad EFI signature: 0x%llx != 0x%llx\n",
 533                             (long long)efi->efi_gpt_Signature,
 534                             (long long)LE_64(EFI_SIGNATURE));
 535                 return (VT_EINVAL);
 536         }
 537
 538         /*
 539          * check CRC of the header; the size of the header should
 540          * never be larger than one block
 541          */
 542         crc = efi->efi_gpt_HeaderCRC32;
 543         efi->efi_gpt_HeaderCRC32 = 0;
 544
 545         if (((len_t)LE_32(efi->efi_gpt_HeaderSize) > dk_ioc->dki_length) ||
 546             crc != LE_32(efi_crc32((unsigned char *)efi,
 547             LE_32(efi->efi_gpt_HeaderSize)))) {
 548                 if (efi_debug)
 549                         (void) fprintf(stderr,
 550                             "Bad EFI CRC: 0x%x != 0x%x\n",
 551                             crc,
 552                             LE_32(efi_crc32((unsigned char *)efi,
 553                             sizeof (struct efi_gpt))));
 554                 return (VT_EINVAL);
 555         }
 556
 557         return (0);
 558 }
 559
 560 static int
 561 efi_read(int fd, struct dk_gpt *vtoc)
 562 {
 563         int                     i, j;
 564         int                     label_len;
 565         int                     rval = 0;
 566         int                     md_flag = 0;
 567         int                     vdc_flag = 0;
 568         diskaddr_t              capacity = 0;
 569         uint_t                  lbsize = 0;
 570         struct dk_minfo         disk_info;
 571         dk_efi_t                dk_ioc;
 572         efi_gpt_t               *efi;
 573         efi_gpe_t               *efi_parts;
 574         struct dk_cinfo         dki_info;
 575         uint32_t                user_length;
 576         boolean_t               legacy_label = B_FALSE;
 577
 578         /*
 579          * get the partition number for this file descriptor.
 580          */
 581         if ((rval = efi_get_info(fd, &dki_info)) != 0)
 582                 return rval;
 583
 584         if ((strncmp(dki_info.dki_cname, "pseudo", 7) == 0) &&
 585             (strncmp(dki_info.dki_dname, "md", 3) == 0)) {
 586                 md_flag++;
 587         } else if ((strncmp(dki_info.dki_cname, "vdc", 4) == 0) &&
 588             (strncmp(dki_info.dki_dname, "vdc", 4) == 0)) {
 589                 /*
 590                  * The controller and drive name "vdc" (virtual disk client)
 591                  * indicates a LDoms virtual disk.
 592                  */
 593                 vdc_flag++;
 594         }
 595
 596         /* get the LBA size */
 597         if (read_disk_info(fd, &capacity, &lbsize) == -1) {
 598                 if (efi_debug) {
 599                         (void) fprintf(stderr,
 600                                        "unable to read disk info: %d",
 601                                        errno);
 602                 }
 603                 return (VT_EINVAL);
 604         }
 605
 606         disk_info.dki_lbsize = lbsize;
 607         disk_info.dki_capacity = capacity;
 608
 609         if (disk_info.dki_lbsize == 0) {
 610                 if (efi_debug) {
 611                         (void) fprintf(stderr,
 612                             "efi_read: assuming LBA 512 bytes\n");
 613                 }
 614                 disk_info.dki_lbsize = DEV_BSIZE;
 615         }
 616         /*
 617          * Read the EFI GPT to figure out how many partitions we need
 618          * to deal with.
 619          */
 620         dk_ioc.dki_lba = 1;
 621         if (NBLOCKS(vtoc->efi_nparts, disk_info.dki_lbsize) < 34) {
 622                 label_len = EFI_MIN_ARRAY_SIZE + disk_info.dki_lbsize;
 623         } else {
 624                 label_len = vtoc->efi_nparts * (int) sizeof (efi_gpe_t) +
 625                     disk_info.dki_lbsize;
 626                 if (label_len % disk_info.dki_lbsize) {
 627                         /* pad to physical sector size */
 628                         label_len += disk_info.dki_lbsize;
 629                         label_len &= ~(disk_info.dki_lbsize - 1);
 630                 }
 631         }
 632
 633         if (posix_memalign((void **)&dk_ioc.dki_data,
 634                            disk_info.dki_lbsize, label_len))
 635                 return (VT_ERROR);
 636
 637         memset(dk_ioc.dki_data, 0, label_len);
 638         dk_ioc.dki_length = disk_info.dki_lbsize;
 639         user_length = vtoc->efi_nparts;
 640         efi = dk_ioc.dki_data;
 641         if (md_flag) {
 642                 dk_ioc.dki_length = label_len;
 643                 if (efi_ioctl(fd, DKIOCGETEFI, &dk_ioc) == -1) {
 644                         switch (errno) {
 645                         case EIO:
 646                                 return (VT_EIO);
 647                         default:
 648                                 return (VT_ERROR);
 649                         }
 650                 }
 651         } else if ((rval = check_label(fd, &dk_ioc)) == VT_EINVAL) {
 652                 /*
 653                  * No valid label here; try the alternate. Note that here
 654                  * we just read GPT header and save it into dk_ioc.data,
 655                  * Later, we will read GUID partition entry array if we
 656                  * can get valid GPT header.
 657                  */
 658
 659                 /*
 660                  * This is a workaround for legacy systems. In the past, the
 661                  * last sector of SCSI disk was invisible on x86 platform. At
 662                  * that time, backup label was saved on the next to the last
 663                  * sector. It is possible for users to move a disk from previous
 664                  * solaris system to present system. Here, we attempt to search
 665                  * legacy backup EFI label first.
 666                  */
 667                 dk_ioc.dki_lba = disk_info.dki_capacity - 2;
 668                 dk_ioc.dki_length = disk_info.dki_lbsize;
 669                 rval = check_label(fd, &dk_ioc);
 670                 if (rval == VT_EINVAL) {
 671                         /*
 672                          * we didn't find legacy backup EFI label, try to
 673                          * search backup EFI label in the last block.
 674                          */
 675                         dk_ioc.dki_lba = disk_info.dki_capacity - 1;
 676                         dk_ioc.dki_length = disk_info.dki_lbsize;
 677                         rval = check_label(fd, &dk_ioc);
 678                         if (rval == 0) {
 679                                 legacy_label = B_TRUE;
 680                                 if (efi_debug)
 681                                         (void) fprintf(stderr,
 682                                             "efi_read: primary label corrupt; "
 683                                             "using EFI backup label located on"
 684                                             " the last block\n");
 685                         }
 686                 } else {
 687                         if ((efi_debug) && (rval == 0))
 688                                 (void) fprintf(stderr, "efi_read: primary label"
 689                                     " corrupt; using legacy EFI backup label "
 690                                     " located on the next to last block\n");
 691                 }
 692
 693                 if (rval == 0) {
 694                         dk_ioc.dki_lba = LE_64(efi->efi_gpt_PartitionEntryLBA);
 695                         vtoc->efi_flags |= EFI_GPT_PRIMARY_CORRUPT;
 696                         vtoc->efi_nparts =
 697                             LE_32(efi->efi_gpt_NumberOfPartitionEntries);
 698                         /*
 699                          * Partition tables are between backup GPT header
 700                          * table and ParitionEntryLBA (the starting LBA of
 701                          * the GUID partition entries array). Now that we
 702                          * already got valid GPT header and saved it in
 703                          * dk_ioc.dki_data, we try to get GUID partition
 704                          * entry array here.
 705                          */
 706                         /* LINTED */
 707                         dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data
 708                             + disk_info.dki_lbsize);
 709                         if (legacy_label)
 710                                 dk_ioc.dki_length = disk_info.dki_capacity - 1 -
 711                                     dk_ioc.dki_lba;
 712                         else
 713                                 dk_ioc.dki_length = disk_info.dki_capacity - 2 -
 714                                     dk_ioc.dki_lba;
 715                         dk_ioc.dki_length *= disk_info.dki_lbsize;
 716                         if (dk_ioc.dki_length >
 717                             ((len_t)label_len - sizeof (*dk_ioc.dki_data))) {
 718                                 rval = VT_EINVAL;
 719                         } else {
 720                                 /*
 721                                  * read GUID partition entry array
 722                                  */
 723                                 rval = efi_ioctl(fd, DKIOCGETEFI, &dk_ioc);
 724                         }
 725                 }
 726
 727         } else if (rval == 0) {
 728
 729                 dk_ioc.dki_lba = LE_64(efi->efi_gpt_PartitionEntryLBA);
 730                 /* LINTED */
 731                 dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data
 732                     + disk_info.dki_lbsize);
 733                 dk_ioc.dki_length = label_len - disk_info.dki_lbsize;
 734                 rval = efi_ioctl(fd, DKIOCGETEFI, &dk_ioc);
 735
 736         } else if (vdc_flag && rval == VT_ERROR && errno == EINVAL) {
 737                 /*
 738                  * When the device is a LDoms virtual disk, the DKIOCGETEFI
 739                  * ioctl can fail with EINVAL if the virtual disk backend
 740                  * is a ZFS volume serviced by a domain running an old version
 741                  * of Solaris. This is because the DKIOCGETEFI ioctl was
 742                  * initially incorrectly implemented for a ZFS volume and it
 743                  * expected the GPT and GPE to be retrieved with a single ioctl.
 744                  * So we try to read the GPT and the GPE using that old style
 745                  * ioctl.
 746                  */
 747                 dk_ioc.dki_lba = 1;
 748                 dk_ioc.dki_length = label_len;
 749                 rval = check_label(fd, &dk_ioc);
 750         }
 751
 752         if (rval < 0) {
 753                 free(efi);
 754                 return (rval);
 755         }
 756
 757         /* LINTED -- always longlong aligned */
 758         efi_parts = (efi_gpe_t *)(((char *)efi) + disk_info.dki_lbsize);
 759
 760         /*
 761          * Assemble this into a "dk_gpt" struct for easier
 762          * digestibility by applications.
 763          */
 764         vtoc->efi_version = LE_32(efi->efi_gpt_Revision);
 765         vtoc->efi_nparts = LE_32(efi->efi_gpt_NumberOfPartitionEntries);
 766         vtoc->efi_part_size = LE_32(efi->efi_gpt_SizeOfPartitionEntry);
 767         vtoc->efi_lbasize = disk_info.dki_lbsize;
 768         vtoc->efi_last_lba = disk_info.dki_capacity - 1;
 769         vtoc->efi_first_u_lba = LE_64(efi->efi_gpt_FirstUsableLBA);
 770         vtoc->efi_last_u_lba = LE_64(efi->efi_gpt_LastUsableLBA);
 771         vtoc->efi_altern_lba = LE_64(efi->efi_gpt_AlternateLBA);
 772         UUID_LE_CONVERT(vtoc->efi_disk_uguid, efi->efi_gpt_DiskGUID);
 773
 774         /*
 775          * If the array the user passed in is too small, set the length
 776          * to what it needs to be and return
 777          */
 778         if (user_length < vtoc->efi_nparts) {
 779                 return (VT_EINVAL);
 780         }
 781
 782         for (i = 0; i < vtoc->efi_nparts; i++) {
 783
 784                 UUID_LE_CONVERT(vtoc->efi_parts[i].p_guid,
 785                     efi_parts[i].efi_gpe_PartitionTypeGUID);
 786
 787                 for (j = 0;
 788                     j < sizeof (conversion_array)
 789                     / sizeof (struct uuid_to_ptag); j++) {
 790
 791                         if (bcmp(&vtoc->efi_parts[i].p_guid,
 792                             &conversion_array[j].uuid,
 793                             sizeof (struct uuid)) == 0) {
 794                                 vtoc->efi_parts[i].p_tag = j;
 795                                 break;
 796                         }
 797                 }
 798                 if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED)
 799                         continue;
 800                 vtoc->efi_parts[i].p_flag =
 801                     LE_16(efi_parts[i].efi_gpe_Attributes.PartitionAttrs);
 802                 vtoc->efi_parts[i].p_start =
 803                     LE_64(efi_parts[i].efi_gpe_StartingLBA);
 804                 vtoc->efi_parts[i].p_size =
 805                     LE_64(efi_parts[i].efi_gpe_EndingLBA) -
 806                     vtoc->efi_parts[i].p_start + 1;
 807                 for (j = 0; j < EFI_PART_NAME_LEN; j++) {
 808                         vtoc->efi_parts[i].p_name[j] =
 809                             (uchar_t)LE_16(
 810                             efi_parts[i].efi_gpe_PartitionName[j]);
 811                 }
 812
 813                 UUID_LE_CONVERT(vtoc->efi_parts[i].p_uguid,
 814                     efi_parts[i].efi_gpe_UniquePartitionGUID);
 815         }
 816         free(efi);
 817
 818         return (dki_info.dki_partition);
 819 }
 820
 821 /* writes a "protective" MBR */
 822 static int
 823 write_pmbr(int fd, struct dk_gpt *vtoc)
 824 {
 825         dk_efi_t        dk_ioc;
 826         struct mboot    mb;
 827         uchar_t         *cp;
 828         diskaddr_t      size_in_lba;
 829         uchar_t         *buf;
 830         int             len;
 831
 832         len = (vtoc->efi_lbasize == 0) ? sizeof (mb) : vtoc->efi_lbasize;
 833         if (posix_memalign((void **)&buf, len, len))
 834                 return (VT_ERROR);
 835
 836         /*
 837          * Preserve any boot code and disk signature if the first block is
 838          * already an MBR.
 839          */
 840         memset(buf, 0, len);
 841         dk_ioc.dki_lba = 0;
 842         dk_ioc.dki_length = len;
 843         /* LINTED -- always longlong aligned */
 844         dk_ioc.dki_data = (efi_gpt_t *)buf;
 845         if (efi_ioctl(fd, DKIOCGETEFI, &dk_ioc) == -1) {
 846                 (void *) memcpy(&mb, buf, sizeof (mb));
 847                 bzero(&mb, sizeof (mb));
 848                 mb.signature = LE_16(MBB_MAGIC);
 849         } else {
 850                 (void *) memcpy(&mb, buf, sizeof (mb));
 851                 if (mb.signature != LE_16(MBB_MAGIC)) {
 852                         bzero(&mb, sizeof (mb));
 853                         mb.signature = LE_16(MBB_MAGIC);
 854                 }
 855         }
 856
 857         bzero(&mb.parts, sizeof (mb.parts));
 858         cp = (uchar_t *)&mb.parts[0];
 859         /* bootable or not */
 860         *cp++ = 0;
 861         /* beginning CHS; 0xffffff if not representable */
 862         *cp++ = 0xff;
 863         *cp++ = 0xff;
 864         *cp++ = 0xff;
 865         /* OS type */
 866         *cp++ = EFI_PMBR;
 867         /* ending CHS; 0xffffff if not representable */
 868         *cp++ = 0xff;
 869         *cp++ = 0xff;
 870         *cp++ = 0xff;
 871         /* starting LBA: 1 (little endian format) by EFI definition */
 872         *cp++ = 0x01;
 873         *cp++ = 0x00;
 874         *cp++ = 0x00;
 875         *cp++ = 0x00;
 876         /* ending LBA: last block on the disk (little endian format) */
 877         size_in_lba = vtoc->efi_last_lba;
 878         if (size_in_lba < 0xffffffff) {
 879                 *cp++ = (size_in_lba & 0x000000ff);
 880                 *cp++ = (size_in_lba & 0x0000ff00) >> 8;
 881                 *cp++ = (size_in_lba & 0x00ff0000) >> 16;
 882                 *cp++ = (size_in_lba & 0xff000000) >> 24;
 883         } else {
 884                 *cp++ = 0xff;
 885                 *cp++ = 0xff;
 886                 *cp++ = 0xff;
 887                 *cp++ = 0xff;
 888         }
 889
 890         (void *) memcpy(buf, &mb, sizeof (mb));
 891         /* LINTED -- always longlong aligned */
 892         dk_ioc.dki_data = (efi_gpt_t *)buf;
 893         dk_ioc.dki_lba = 0;
 894         dk_ioc.dki_length = len;
 895         if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) {
 896                 free(buf);
 897                 switch (errno) {
 898                 case EIO:
 899                         return (VT_EIO);
 900                 case EINVAL:
 901                         return (VT_EINVAL);
 902                 default:
 903                         return (VT_ERROR);
 904                 }
 905         }
 906         free(buf);
 907         return (0);
 908 }
 909
 910 /* make sure the user specified something reasonable */
 911 static int
 912 check_input(struct dk_gpt *vtoc)
 913 {
 914         int                     resv_part = -1;
 915         int                     i, j;
 916         diskaddr_t              istart, jstart, isize, jsize, endsect;
 917
 918         /*
 919          * Sanity-check the input (make sure no partitions overlap)
 920          */
 921         for (i = 0; i < vtoc->efi_nparts; i++) {
 922                 /* It can't be unassigned and have an actual size */
 923                 if ((vtoc->efi_parts[i].p_tag == V_UNASSIGNED) &&
 924                     (vtoc->efi_parts[i].p_size != 0)) {
 925                         if (efi_debug) {
 926                                 (void) fprintf(stderr, "partition %d is "
 927                                     "\"unassigned\" but has a size of %llu",
 928                                     i, vtoc->efi_parts[i].p_size);
 929                         }
 930                         return (VT_EINVAL);
 931                 }
 932                 if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED) {
 933                         if (uuid_is_null((uchar_t *)&vtoc->efi_parts[i].p_guid))
 934                                 continue;
 935                         /* we have encountered an unknown uuid */
 936                         vtoc->efi_parts[i].p_tag = 0xff;
 937                 }
 938                 if (vtoc->efi_parts[i].p_tag == V_RESERVED) {
 939                         if (resv_part != -1) {
 940                                 if (efi_debug) {
 941                                         (void) fprintf(stderr, "found "
 942                                             "duplicate reserved partition "
 943                                             "at %d\n", i);
 944                                 }
 945                                 return (VT_EINVAL);
 946                         }
 947                         resv_part = i;
 948                 }
 949                 if ((vtoc->efi_parts[i].p_start < vtoc->efi_first_u_lba) ||
 950                     (vtoc->efi_parts[i].p_start > vtoc->efi_last_u_lba)) {
 951                         if (efi_debug) {
 952                                 (void) fprintf(stderr,
 953                                     "Partition %d starts at %llu.  ",
 954                                     i,
 955                                     vtoc->efi_parts[i].p_start);
 956                                 (void) fprintf(stderr,
 957                                     "It must be between %llu and %llu.\n",
 958                                     vtoc->efi_first_u_lba,
 959                                     vtoc->efi_last_u_lba);
 960                         }
 961                         return (VT_EINVAL);
 962                 }
 963                 if ((vtoc->efi_parts[i].p_start +
 964                     vtoc->efi_parts[i].p_size <
 965                     vtoc->efi_first_u_lba) ||
 966                     (vtoc->efi_parts[i].p_start +
 967                     vtoc->efi_parts[i].p_size >
 968                     vtoc->efi_last_u_lba + 1)) {
 969                         if (efi_debug) {
 970                                 (void) fprintf(stderr,
 971                                     "Partition %d ends at %llu.  ",
 972                                     i,
 973                                     vtoc->efi_parts[i].p_start +
 974                                     vtoc->efi_parts[i].p_size);
 975                                 (void) fprintf(stderr,
 976                                     "It must be between %llu and %llu.\n",
 977                                     vtoc->efi_first_u_lba,
 978                                     vtoc->efi_last_u_lba);
 979                         }
 980                         return (VT_EINVAL);
 981                 }
 982
 983                 for (j = 0; j < vtoc->efi_nparts; j++) {
 984                         isize = vtoc->efi_parts[i].p_size;
 985                         jsize = vtoc->efi_parts[j].p_size;
 986                         istart = vtoc->efi_parts[i].p_start;
 987                         jstart = vtoc->efi_parts[j].p_start;
 988                         if ((i != j) && (isize != 0) && (jsize != 0)) {
 989                                 endsect = jstart + jsize -1;
 990                                 if ((jstart <= istart) &&
 991                                     (istart <= endsect)) {
 992                                         if (efi_debug) {
 993                                                 (void) fprintf(stderr,
 994                                                     "Partition %d overlaps "
 995                                                     "partition %d.", i, j);
 996                                         }
 997                                         return (VT_EINVAL);
 998                                 }
 999                         }
1000                 }
1001         }
1002         /* just a warning for now */
1003         if ((resv_part == -1) && efi_debug) {
1004                 (void) fprintf(stderr,
1005                     "no reserved partition found\n");
1006         }
1007         return (0);
1008 }
1009
1010 /*
1011  * add all the unallocated space to the current label
1012  */
1013 int
1014 efi_use_whole_disk(int fd)
1015 {
1016         struct dk_gpt           *efi_label;
1017         int                     rval;
1018         int                     i;
1019         uint_t                  phy_last_slice = 0;
1020         diskaddr_t              pl_start = 0;
1021         diskaddr_t              pl_size;
1022
1023         rval = efi_alloc_and_read(fd, &efi_label);
1024         if (rval < 0) {
1025                 return (rval);
1026         }
1027
1028         /* find the last physically non-zero partition */
1029         for (i = 0; i < efi_label->efi_nparts - 2; i ++) {
1030                 if (pl_start < efi_label->efi_parts[i].p_start) {
1031                         pl_start = efi_label->efi_parts[i].p_start;
1032                         phy_last_slice = i;
1033                 }
1034         }
1035         pl_size = efi_label->efi_parts[phy_last_slice].p_size;
1036
1037         /*
1038          * If alter_lba is 1, we are using the backup label.
1039          * Since we can locate the backup label by disk capacity,
1040          * there must be no unallocated space.
1041          */
1042         if ((efi_label->efi_altern_lba == 1) || (efi_label->efi_altern_lba
1043             >= efi_label->efi_last_lba)) {
1044                 if (efi_debug) {
1045                         (void) fprintf(stderr,
1046                             "efi_use_whole_disk: requested space not found\n");
1047                 }
1048                 efi_free(efi_label);
1049                 return (VT_ENOSPC);
1050         }
1051
1052         /*
1053          * If there is space between the last physically non-zero partition
1054          * and the reserved partition, just add the unallocated space to this
1055          * area. Otherwise, the unallocated space is added to the last
1056          * physically non-zero partition.
1057          */
1058         if (pl_start + pl_size - 1 == efi_label->efi_last_u_lba -
1059             EFI_MIN_RESV_SIZE) {
1060                 efi_label->efi_parts[phy_last_slice].p_size +=
1061                     efi_label->efi_last_lba - efi_label->efi_altern_lba;
1062         }
1063
1064         /*
1065          * Move the reserved partition. There is currently no data in
1066          * here except fabricated devids (which get generated via
1067          * efi_write()). So there is no need to copy data.
1068          */
1069         efi_label->efi_parts[efi_label->efi_nparts - 1].p_start +=
1070             efi_label->efi_last_lba - efi_label->efi_altern_lba;
1071         efi_label->efi_last_u_lba += efi_label->efi_last_lba
1072             - efi_label->efi_altern_lba;
1073
1074         rval = efi_write(fd, efi_label);
1075         if (rval < 0) {
1076                 if (efi_debug) {
1077                         (void) fprintf(stderr,
1078                             "efi_use_whole_disk:fail to write label, rval=%d\n",
1079                             rval);
1080                 }
1081                 efi_free(efi_label);
1082                 return (rval);
1083         }
1084
1085         efi_free(efi_label);
1086         return (0);
1087 }
1088
1089
1090 /*
1091  * write EFI label and backup label
1092  */
1093 int
1094 efi_write(int fd, struct dk_gpt *vtoc)
1095 {
1096         dk_efi_t                dk_ioc;
1097         efi_gpt_t               *efi;
1098         efi_gpe_t               *efi_parts;
1099         int                     i, j;
1100         struct dk_cinfo         dki_info;
1101         int                     rval;
1102         int                     md_flag = 0;
1103         int                     nblocks;
1104         diskaddr_t              lba_backup_gpt_hdr;
1105
1106         if ((rval = efi_get_info(fd, &dki_info)) != 0)
1107                 return rval;
1108
1109         /* check if we are dealing wih a metadevice */
1110         if ((strncmp(dki_info.dki_cname, "pseudo", 7) == 0) &&
1111             (strncmp(dki_info.dki_dname, "md", 3) == 0)) {
1112                 md_flag = 1;
1113         }
1114
1115         if (check_input(vtoc)) {
1116                 /*
1117                  * not valid; if it's a metadevice just pass it down
1118                  * because SVM will do its own checking
1119                  */
1120                 if (md_flag == 0) {
1121                         return (VT_EINVAL);
1122                 }
1123         }
1124
1125         dk_ioc.dki_lba = 1;
1126         if (NBLOCKS(vtoc->efi_nparts, vtoc->efi_lbasize) < 34) {
1127                 dk_ioc.dki_length = EFI_MIN_ARRAY_SIZE + vtoc->efi_lbasize;
1128         } else {
1129                 dk_ioc.dki_length = NBLOCKS(vtoc->efi_nparts,
1130                     vtoc->efi_lbasize) *
1131                     vtoc->efi_lbasize;
1132         }
1133
1134         /*
1135          * the number of blocks occupied by GUID partition entry array
1136          */
1137         nblocks = dk_ioc.dki_length / vtoc->efi_lbasize - 1;
1138
1139         /*
1140          * Backup GPT header is located on the block after GUID
1141          * partition entry array. Here, we calculate the address
1142          * for backup GPT header.
1143          */
1144         lba_backup_gpt_hdr = vtoc->efi_last_u_lba + 1 + nblocks;
1145         if (posix_memalign((void **)&dk_ioc.dki_data,
1146                            vtoc->efi_lbasize, dk_ioc.dki_length))
1147                 return (VT_ERROR);
1148
1149         memset(dk_ioc.dki_data, 0, dk_ioc.dki_length);
1150         efi = dk_ioc.dki_data;
1151
1152         /* stuff user's input into EFI struct */
1153         efi->efi_gpt_Signature = LE_64(EFI_SIGNATURE);
1154         efi->efi_gpt_Revision = LE_32(vtoc->efi_version); /* 0x02000100 */
1155         efi->efi_gpt_HeaderSize = LE_32(sizeof (struct efi_gpt));
1156         efi->efi_gpt_Reserved1 = 0;
1157         efi->efi_gpt_MyLBA = LE_64(1ULL);
1158         efi->efi_gpt_AlternateLBA = LE_64(lba_backup_gpt_hdr);
1159         efi->efi_gpt_FirstUsableLBA = LE_64(vtoc->efi_first_u_lba);
1160         efi->efi_gpt_LastUsableLBA = LE_64(vtoc->efi_last_u_lba);
1161         efi->efi_gpt_PartitionEntryLBA = LE_64(2ULL);
1162         efi->efi_gpt_NumberOfPartitionEntries = LE_32(vtoc->efi_nparts);
1163         efi->efi_gpt_SizeOfPartitionEntry = LE_32(sizeof (struct efi_gpe));
1164         UUID_LE_CONVERT(efi->efi_gpt_DiskGUID, vtoc->efi_disk_uguid);
1165
1166         /* LINTED -- always longlong aligned */
1167         efi_parts = (efi_gpe_t *)((char *)dk_ioc.dki_data + vtoc->efi_lbasize);
1168
1169         for (i = 0; i < vtoc->efi_nparts; i++) {
1170                 for (j = 0;
1171                     j < sizeof (conversion_array) /
1172                     sizeof (struct uuid_to_ptag); j++) {
1173
1174                         if (vtoc->efi_parts[i].p_tag == j) {
1175                                 UUID_LE_CONVERT(
1176                                     efi_parts[i].efi_gpe_PartitionTypeGUID,
1177                                     conversion_array[j].uuid);
1178                                 break;
1179                         }
1180                 }
1181
1182                 if (j == sizeof (conversion_array) /
1183                     sizeof (struct uuid_to_ptag)) {
1184                         /*
1185                          * If we didn't have a matching uuid match, bail here.
1186                          * Don't write a label with unknown uuid.
1187                          */
1188                         if (efi_debug) {
1189                                 (void) fprintf(stderr,
1190                                     "Unknown uuid for p_tag %d\n",
1191                                     vtoc->efi_parts[i].p_tag);
1192                         }
1193                         return (VT_EINVAL);
1194                 }
1195
1196                 /* Zero's should be written for empty partitions */
1197                 if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED)
1198                         continue;
1199
1200                 efi_parts[i].efi_gpe_StartingLBA =
1201                     LE_64(vtoc->efi_parts[i].p_start);
1202                 efi_parts[i].efi_gpe_EndingLBA =
1203                     LE_64(vtoc->efi_parts[i].p_start +
1204                     vtoc->efi_parts[i].p_size - 1);
1205                 efi_parts[i].efi_gpe_Attributes.PartitionAttrs =
1206                     LE_16(vtoc->efi_parts[i].p_flag);
1207                 for (j = 0; j < EFI_PART_NAME_LEN; j++) {
1208                         efi_parts[i].efi_gpe_PartitionName[j] =
1209                             LE_16((ushort_t)vtoc->efi_parts[i].p_name[j]);
1210                 }
1211                 if ((vtoc->efi_parts[i].p_tag != V_UNASSIGNED) &&
1212                     uuid_is_null((uchar_t *)&vtoc->efi_parts[i].p_uguid)) {
1213                         (void) uuid_generate((uchar_t *)
1214                             &vtoc->efi_parts[i].p_uguid);
1215                 }
1216                 bcopy(&vtoc->efi_parts[i].p_uguid,
1217                     &efi_parts[i].efi_gpe_UniquePartitionGUID,
1218                     sizeof (uuid_t));
1219         }
1220         efi->efi_gpt_PartitionEntryArrayCRC32 =
1221             LE_32(efi_crc32((unsigned char *)efi_parts,
1222             vtoc->efi_nparts * (int)sizeof (struct efi_gpe)));
1223         efi->efi_gpt_HeaderCRC32 =
1224             LE_32(efi_crc32((unsigned char *)efi, sizeof (struct efi_gpt)));
1225
1226         if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) {
1227                 free(dk_ioc.dki_data);
1228                 switch (errno) {
1229                 case EIO:
1230                         return (VT_EIO);
1231                 case EINVAL:
1232                         return (VT_EINVAL);
1233                 default:
1234                         return (VT_ERROR);
1235                 }
1236         }
1237         /* if it's a metadevice we're done */
1238         if (md_flag) {
1239                 free(dk_ioc.dki_data);
1240                 return (0);
1241         }
1242
1243         /* write backup partition array */
1244         dk_ioc.dki_lba = vtoc->efi_last_u_lba + 1;
1245         dk_ioc.dki_length -= vtoc->efi_lbasize;
1246         /* LINTED */
1247         dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data +
1248             vtoc->efi_lbasize);
1249
1250         if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) {
1251                 /*
1252                  * we wrote the primary label okay, so don't fail
1253                  */
1254                 if (efi_debug) {
1255                         (void) fprintf(stderr,
1256                             "write of backup partitions to block %llu "
1257                             "failed, errno %d\n",
1258                             vtoc->efi_last_u_lba + 1,
1259                             errno);
1260                 }
1261         }
1262         /*
1263          * now swap MyLBA and AlternateLBA fields and write backup
1264          * partition table header
1265          */
1266         dk_ioc.dki_lba = lba_backup_gpt_hdr;
1267         dk_ioc.dki_length = vtoc->efi_lbasize;
1268         /* LINTED */
1269         dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data -
1270             vtoc->efi_lbasize);
1271         efi->efi_gpt_AlternateLBA = LE_64(1ULL);
1272         efi->efi_gpt_MyLBA = LE_64(lba_backup_gpt_hdr);
1273         efi->efi_gpt_PartitionEntryLBA = LE_64(vtoc->efi_last_u_lba + 1);
1274         efi->efi_gpt_HeaderCRC32 = 0;
1275         efi->efi_gpt_HeaderCRC32 =
1276             LE_32(efi_crc32((unsigned char *)dk_ioc.dki_data,
1277             sizeof (struct efi_gpt)));
1278
1279         if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) {
1280                 if (efi_debug) {
1281                         (void) fprintf(stderr,
1282                             "write of backup header to block %llu failed, "
1283                             "errno %d\n",
1284                             lba_backup_gpt_hdr,
1285                             errno);
1286                 }
1287         }
1288         /* write the PMBR */
1289         (void) write_pmbr(fd, vtoc);
1290         free(dk_ioc.dki_data);
1291
1292 #if defined(__linux__)
1293         rval = efi_rescan(fd);
1294         if (rval)
1295                 return (VT_ERROR);
1296 #endif
1297
1298         return (0);
1299 }
1300
1301 void
1302 efi_free(struct dk_gpt *ptr)
1303 {
1304         free(ptr);
1305 }
1306
1307 /*
1308  * Input: File descriptor
1309  * Output: 1 if disk has an EFI label, or > 2TB with no VTOC or legacy MBR.
1310  * Otherwise 0.
1311  */
1312 int
1313 efi_type(int fd)
1314 {
1315 #if 0
1316         struct vtoc vtoc;
1317         struct extvtoc extvtoc;
1318
1319         if (ioctl(fd, DKIOCGEXTVTOC, &extvtoc) == -1) {
1320                 if (errno == ENOTSUP)
1321                         return (1);
1322                 else if (errno == ENOTTY) {
1323                         if (ioctl(fd, DKIOCGVTOC, &vtoc) == -1)
1324                                 if (errno == ENOTSUP)
1325                                         return (1);
1326                 }
1327         }
1328         return (0);
1329 #else
1330         return (ENOSYS);
1331 #endif
1332 }
1333
1334 void
1335 efi_err_check(struct dk_gpt *vtoc)
1336 {
1337         int                     resv_part = -1;
1338         int                     i, j;
1339         diskaddr_t              istart, jstart, isize, jsize, endsect;
1340         int                     overlap = 0;
1341
1342         /*
1343          * make sure no partitions overlap
1344          */
1345         for (i = 0; i < vtoc->efi_nparts; i++) {
1346                 /* It can't be unassigned and have an actual size */
1347                 if ((vtoc->efi_parts[i].p_tag == V_UNASSIGNED) &&
1348                     (vtoc->efi_parts[i].p_size != 0)) {
1349                         (void) fprintf(stderr,
1350                             "partition %d is \"unassigned\" but has a size "
1351                             "of %llu\n", i, vtoc->efi_parts[i].p_size);
1352                 }
1353                 if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED) {
1354                         continue;
1355                 }
1356                 if (vtoc->efi_parts[i].p_tag == V_RESERVED) {
1357                         if (resv_part != -1) {
1358                                 (void) fprintf(stderr,
1359                                     "found duplicate reserved partition at "
1360                                     "%d\n", i);
1361                         }
1362                         resv_part = i;
1363                         if (vtoc->efi_parts[i].p_size != EFI_MIN_RESV_SIZE)
1364                                 (void) fprintf(stderr,
1365                                     "Warning: reserved partition size must "
1366                                     "be %d sectors\n", EFI_MIN_RESV_SIZE);
1367                 }
1368                 if ((vtoc->efi_parts[i].p_start < vtoc->efi_first_u_lba) ||
1369                     (vtoc->efi_parts[i].p_start > vtoc->efi_last_u_lba)) {
1370                         (void) fprintf(stderr,
1371                             "Partition %d starts at %llu\n",
1372                             i,
1373                             vtoc->efi_parts[i].p_start);
1374                         (void) fprintf(stderr,
1375                             "It must be between %llu and %llu.\n",
1376                             vtoc->efi_first_u_lba,
1377                             vtoc->efi_last_u_lba);
1378                 }
1379                 if ((vtoc->efi_parts[i].p_start +
1380                     vtoc->efi_parts[i].p_size <
1381                     vtoc->efi_first_u_lba) ||
1382                     (vtoc->efi_parts[i].p_start +
1383                     vtoc->efi_parts[i].p_size >
1384                     vtoc->efi_last_u_lba + 1)) {
1385                         (void) fprintf(stderr,
1386                             "Partition %d ends at %llu\n",
1387                             i,
1388                             vtoc->efi_parts[i].p_start +
1389                             vtoc->efi_parts[i].p_size);
1390                         (void) fprintf(stderr,
1391                             "It must be between %llu and %llu.\n",
1392                             vtoc->efi_first_u_lba,
1393                             vtoc->efi_last_u_lba);
1394                 }
1395
1396                 for (j = 0; j < vtoc->efi_nparts; j++) {
1397                         isize = vtoc->efi_parts[i].p_size;
1398                         jsize = vtoc->efi_parts[j].p_size;
1399                         istart = vtoc->efi_parts[i].p_start;
1400                         jstart = vtoc->efi_parts[j].p_start;
1401                         if ((i != j) && (isize != 0) && (jsize != 0)) {
1402                                 endsect = jstart + jsize -1;
1403                                 if ((jstart <= istart) &&
1404                                     (istart <= endsect)) {
1405                                         if (!overlap) {
1406                                         (void) fprintf(stderr,
1407                                             "label error: EFI Labels do not "
1408                                             "support overlapping partitions\n");
1409                                         }
1410                                         (void) fprintf(stderr,
1411                                             "Partition %d overlaps partition "
1412                                             "%d.\n", i, j);
1413                                         overlap = 1;
1414                                 }
1415                         }
1416                 }
1417         }
1418         /* make sure there is a reserved partition */
1419         if (resv_part == -1) {
1420                 (void) fprintf(stderr,
1421                     "no reserved partition found\n");
1422         }
1423 }
1424
1425 /*
1426  * We need to get information necessary to construct a *new* efi
1427  * label type
1428  */
1429 int
1430 efi_auto_sense(int fd, struct dk_gpt **vtoc)
1431 {
1432
1433         int     i;
1434
1435         /*
1436          * Now build the default partition table
1437          */
1438         if (efi_alloc_and_init(fd, EFI_NUMPAR, vtoc) != 0) {
1439                 if (efi_debug) {
1440                         (void) fprintf(stderr, "efi_alloc_and_init failed.\n");
1441                 }
1442                 return (-1);
1443         }
1444
1445         for (i = 0; i < MIN((*vtoc)->efi_nparts, V_NUMPAR); i++) {
1446                 (*vtoc)->efi_parts[i].p_tag = default_vtoc_map[i].p_tag;
1447                 (*vtoc)->efi_parts[i].p_flag = default_vtoc_map[i].p_flag;
1448                 (*vtoc)->efi_parts[i].p_start = 0;
1449                 (*vtoc)->efi_parts[i].p_size = 0;
1450         }
1451         /*
1452          * Make constants first
1453          * and variable partitions later
1454          */
1455
1456         /* root partition - s0 128 MB */
1457         (*vtoc)->efi_parts[0].p_start = 34;
1458         (*vtoc)->efi_parts[0].p_size = 262144;
1459
1460         /* partition - s1  128 MB */
1461         (*vtoc)->efi_parts[1].p_start = 262178;
1462         (*vtoc)->efi_parts[1].p_size = 262144;
1463
1464         /* partition -s2 is NOT the Backup disk */
1465         (*vtoc)->efi_parts[2].p_tag = V_UNASSIGNED;
1466
1467         /* partition -s6 /usr partition - HOG */
1468         (*vtoc)->efi_parts[6].p_start = 524322;
1469         (*vtoc)->efi_parts[6].p_size = (*vtoc)->efi_last_u_lba - 524322
1470             - (1024 * 16);
1471
1472         /* efi reserved partition - s9 16K */
1473         (*vtoc)->efi_parts[8].p_start = (*vtoc)->efi_last_u_lba - (1024 * 16);
1474         (*vtoc)->efi_parts[8].p_size = (1024 * 16);
1475         (*vtoc)->efi_parts[8].p_tag = V_RESERVED;
1476         return (0);
1477 }