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 (c) 2018 by Delphix. All rights reserved. 26 */ 27 28 #include <stdio.h> 29 #include <stdlib.h> 30 #include <errno.h> 31 #include <string.h> 32 #include <strings.h> 33 #include <unistd.h> 34 #include <uuid/uuid.h> 35 #include <zlib.h> 36 #include <libintl.h> 37 #include <sys/types.h> 38 #include <sys/dkio.h> 39 #include <sys/vtoc.h> 40 #include <sys/mhd.h> 41 #include <sys/param.h> 42 #include <sys/dktp/fdisk.h> 43 #include <sys/efi_partition.h> 44 #include <sys/byteorder.h> 45 #include <sys/vdev_disk.h> 46 #include <linux/fs.h> 47 #include <linux/blkpg.h> 48 49 static struct uuid_to_ptag { 50 struct uuid uuid; 51 } conversion_array[] = { 52 { EFI_UNUSED }, 53 { EFI_BOOT }, 54 { EFI_ROOT }, 55 { EFI_SWAP }, 56 { EFI_USR }, 57 { EFI_BACKUP }, 58 { EFI_UNUSED }, /* STAND is never used */ 59 { EFI_VAR }, 60 { EFI_HOME }, 61 { EFI_ALTSCTR }, 62 { EFI_UNUSED }, /* CACHE (cachefs) is never used */ 63 { EFI_RESERVED }, 64 { EFI_SYSTEM }, 65 { EFI_LEGACY_MBR }, 66 { EFI_SYMC_PUB }, 67 { EFI_SYMC_CDS }, 68 { EFI_MSFT_RESV }, 69 { EFI_DELL_BASIC }, 70 { EFI_DELL_RAID }, 71 { EFI_DELL_SWAP }, 72 { EFI_DELL_LVM }, 73 { EFI_DELL_RESV }, 74 { EFI_AAPL_HFS }, 75 { EFI_AAPL_UFS }, 76 { EFI_FREEBSD_BOOT }, 77 { EFI_FREEBSD_SWAP }, 78 { EFI_FREEBSD_UFS }, 79 { EFI_FREEBSD_VINUM }, 80 { EFI_FREEBSD_ZFS }, 81 { EFI_BIOS_BOOT }, 82 { EFI_INTC_RS }, 83 { EFI_SNE_BOOT }, 84 { EFI_LENOVO_BOOT }, 85 { EFI_MSFT_LDMM }, 86 { EFI_MSFT_LDMD }, 87 { EFI_MSFT_RE }, 88 { EFI_IBM_GPFS }, 89 { EFI_MSFT_STORAGESPACES }, 90 { EFI_HPQ_DATA }, 91 { EFI_HPQ_SVC }, 92 { EFI_RHT_DATA }, 93 { EFI_RHT_HOME }, 94 { EFI_RHT_SRV }, 95 { EFI_RHT_DMCRYPT }, 96 { EFI_RHT_LUKS }, 97 { EFI_FREEBSD_DISKLABEL }, 98 { EFI_AAPL_RAID }, 99 { EFI_AAPL_RAIDOFFLINE }, 100 { EFI_AAPL_BOOT }, 101 { EFI_AAPL_LABEL }, 102 { EFI_AAPL_TVRECOVERY }, 103 { EFI_AAPL_CORESTORAGE }, 104 { EFI_NETBSD_SWAP }, 105 { EFI_NETBSD_FFS }, 106 { EFI_NETBSD_LFS }, 107 { EFI_NETBSD_RAID }, 108 { EFI_NETBSD_CAT }, 109 { EFI_NETBSD_CRYPT }, 110 { EFI_GOOG_KERN }, 111 { EFI_GOOG_ROOT }, 112 { EFI_GOOG_RESV }, 113 { EFI_HAIKU_BFS }, 114 { EFI_MIDNIGHTBSD_BOOT }, 115 { EFI_MIDNIGHTBSD_DATA }, 116 { EFI_MIDNIGHTBSD_SWAP }, 117 { EFI_MIDNIGHTBSD_UFS }, 118 { EFI_MIDNIGHTBSD_VINUM }, 119 { EFI_MIDNIGHTBSD_ZFS }, 120 { EFI_CEPH_JOURNAL }, 121 { EFI_CEPH_DMCRYPTJOURNAL }, 122 { EFI_CEPH_OSD }, 123 { EFI_CEPH_DMCRYPTOSD }, 124 { EFI_CEPH_CREATE }, 125 { EFI_CEPH_DMCRYPTCREATE }, 126 { EFI_OPENBSD_DISKLABEL }, 127 { EFI_BBRY_QNX }, 128 { EFI_BELL_PLAN9 }, 129 { EFI_VMW_KCORE }, 130 { EFI_VMW_VMFS }, 131 { EFI_VMW_RESV }, 132 { EFI_RHT_ROOTX86 }, 133 { EFI_RHT_ROOTAMD64 }, 134 { EFI_RHT_ROOTARM }, 135 { EFI_RHT_ROOTARM64 }, 136 { EFI_ACRONIS_SECUREZONE }, 137 { EFI_ONIE_BOOT }, 138 { EFI_ONIE_CONFIG }, 139 { EFI_IBM_PPRPBOOT }, 140 { EFI_FREEDESKTOP_BOOT } 141 }; 142 143 /* 144 * Default vtoc information for non-SVr4 partitions 145 */ 146 struct dk_map2 default_vtoc_map[NDKMAP] = { 147 { V_ROOT, 0 }, /* a - 0 */ 148 { V_SWAP, V_UNMNT }, /* b - 1 */ 149 { V_BACKUP, V_UNMNT }, /* c - 2 */ 150 { V_UNASSIGNED, 0 }, /* d - 3 */ 151 { V_UNASSIGNED, 0 }, /* e - 4 */ 152 { V_UNASSIGNED, 0 }, /* f - 5 */ 153 { V_USR, 0 }, /* g - 6 */ 154 { V_UNASSIGNED, 0 }, /* h - 7 */ 155 156 #if defined(_SUNOS_VTOC_16) 157 158 #if defined(i386) || defined(__amd64) || defined(__arm) || \ 159 defined(__powerpc) || defined(__sparc) || defined(__s390__) || \ 160 defined(__mips__) || defined(__rv64g__) 161 { V_BOOT, V_UNMNT }, /* i - 8 */ 162 { V_ALTSCTR, 0 }, /* j - 9 */ 163 164 #else 165 #error No VTOC format defined. 166 #endif /* defined(i386) */ 167 168 { V_UNASSIGNED, 0 }, /* k - 10 */ 169 { V_UNASSIGNED, 0 }, /* l - 11 */ 170 { V_UNASSIGNED, 0 }, /* m - 12 */ 171 { V_UNASSIGNED, 0 }, /* n - 13 */ 172 { V_UNASSIGNED, 0 }, /* o - 14 */ 173 { V_UNASSIGNED, 0 }, /* p - 15 */ 174 #endif /* defined(_SUNOS_VTOC_16) */ 175 }; 176 177 int efi_debug = 0; 178 179 static int efi_read(int, struct dk_gpt *); 180 181 /* 182 * Return a 32-bit CRC of the contents of the buffer. Pre-and-post 183 * one's conditioning will be handled by crc32() internally. 184 */ 185 static uint32_t 186 efi_crc32(const unsigned char *buf, unsigned int size) 187 { 188 uint32_t crc = crc32(0, Z_NULL, 0); 189 190 crc = crc32(crc, buf, size); 191 192 return (crc); 193 } 194 195 static int 196 read_disk_info(int fd, diskaddr_t *capacity, uint_t *lbsize) 197 { 198 int sector_size; 199 unsigned long long capacity_size; 200 201 if (ioctl(fd, BLKSSZGET, §or_size) < 0) 202 return (-1); 203 204 if (ioctl(fd, BLKGETSIZE64, &capacity_size) < 0) 205 return (-1); 206 207 *lbsize = (uint_t)sector_size; 208 *capacity = (diskaddr_t)(capacity_size / sector_size); 209 210 return (0); 211 } 212 213 /* 214 * Return back the device name associated with the file descriptor. The 215 * caller is responsible for freeing the memory associated with the 216 * returned string. 217 */ 218 static char * 219 efi_get_devname(int fd) 220 { 221 char *path; 222 char *dev_name; 223 224 path = calloc(1, PATH_MAX); 225 if (path == NULL) 226 return (NULL); 227 228 /* 229 * The libefi API only provides the open fd and not the file path. 230 * To handle this realpath(3) is used to resolve the block device 231 * name from /proc/self/fd/<fd>. 232 */ 233 (void) sprintf(path, "/proc/self/fd/%d", fd); 234 dev_name = realpath(path, NULL); 235 free(path); 236 return (dev_name); 237 } 238 239 static int 240 efi_get_info(int fd, struct dk_cinfo *dki_info) 241 { 242 char *dev_path; 243 int rval = 0; 244 245 memset(dki_info, 0, sizeof (*dki_info)); 246 247 /* 248 * The simplest way to get the partition number under linux is 249 * to parse it out of the /dev/<disk><partition> block device name. 250 * The kernel creates this using the partition number when it 251 * populates /dev/ so it may be trusted. The tricky bit here is 252 * that the naming convention is based on the block device type. 253 * So we need to take this in to account when parsing out the 254 * partition information. Aside from the partition number we collect 255 * some additional device info. 256 */ 257 dev_path = efi_get_devname(fd); 258 if (dev_path == NULL) 259 goto error; 260 261 if ((strncmp(dev_path, "/dev/sd", 7) == 0)) { 262 strcpy(dki_info->dki_cname, "sd"); 263 dki_info->dki_ctype = DKC_SCSI_CCS; 264 rval = sscanf(dev_path, "/dev/%[a-zA-Z]%hu", 265 dki_info->dki_dname, 266 &dki_info->dki_partition); 267 } else if ((strncmp(dev_path, "/dev/hd", 7) == 0)) { 268 strcpy(dki_info->dki_cname, "hd"); 269 dki_info->dki_ctype = DKC_DIRECT; 270 rval = sscanf(dev_path, "/dev/%[a-zA-Z]%hu", 271 dki_info->dki_dname, 272 &dki_info->dki_partition); 273 } else if ((strncmp(dev_path, "/dev/md", 7) == 0)) { 274 strcpy(dki_info->dki_cname, "pseudo"); 275 dki_info->dki_ctype = DKC_MD; 276 strcpy(dki_info->dki_dname, "md"); 277 rval = sscanf(dev_path, "/dev/md%[0-9]p%hu", 278 dki_info->dki_dname + 2, 279 &dki_info->dki_partition); 280 } else if ((strncmp(dev_path, "/dev/vd", 7) == 0)) { 281 strcpy(dki_info->dki_cname, "vd"); 282 dki_info->dki_ctype = DKC_MD; 283 rval = sscanf(dev_path, "/dev/%[a-zA-Z]%hu", 284 dki_info->dki_dname, 285 &dki_info->dki_partition); 286 } else if ((strncmp(dev_path, "/dev/xvd", 8) == 0)) { 287 strcpy(dki_info->dki_cname, "xvd"); 288 dki_info->dki_ctype = DKC_MD; 289 rval = sscanf(dev_path, "/dev/%[a-zA-Z]%hu", 290 dki_info->dki_dname, 291 &dki_info->dki_partition); 292 } else if ((strncmp(dev_path, "/dev/zd", 7) == 0)) { 293 strcpy(dki_info->dki_cname, "zd"); 294 dki_info->dki_ctype = DKC_MD; 295 strcpy(dki_info->dki_dname, "zd"); 296 rval = sscanf(dev_path, "/dev/zd%[0-9]p%hu", 297 dki_info->dki_dname + 2, 298 &dki_info->dki_partition); 299 } else if ((strncmp(dev_path, "/dev/dm-", 8) == 0)) { 300 strcpy(dki_info->dki_cname, "pseudo"); 301 dki_info->dki_ctype = DKC_VBD; 302 strcpy(dki_info->dki_dname, "dm-"); 303 rval = sscanf(dev_path, "/dev/dm-%[0-9]p%hu", 304 dki_info->dki_dname + 3, 305 &dki_info->dki_partition); 306 } else if ((strncmp(dev_path, "/dev/ram", 8) == 0)) { 307 strcpy(dki_info->dki_cname, "pseudo"); 308 dki_info->dki_ctype = DKC_PCMCIA_MEM; 309 strcpy(dki_info->dki_dname, "ram"); 310 rval = sscanf(dev_path, "/dev/ram%[0-9]p%hu", 311 dki_info->dki_dname + 3, 312 &dki_info->dki_partition); 313 } else if ((strncmp(dev_path, "/dev/loop", 9) == 0)) { 314 strcpy(dki_info->dki_cname, "pseudo"); 315 dki_info->dki_ctype = DKC_VBD; 316 strcpy(dki_info->dki_dname, "loop"); 317 rval = sscanf(dev_path, "/dev/loop%[0-9]p%hu", 318 dki_info->dki_dname + 4, 319 &dki_info->dki_partition); 320 } else if ((strncmp(dev_path, "/dev/nvme", 9) == 0)) { 321 strcpy(dki_info->dki_cname, "nvme"); 322 dki_info->dki_ctype = DKC_SCSI_CCS; 323 strcpy(dki_info->dki_dname, "nvme"); 324 (void) sscanf(dev_path, "/dev/nvme%[0-9]", 325 dki_info->dki_dname + 4); 326 size_t controller_length = strlen( 327 dki_info->dki_dname); 328 strcpy(dki_info->dki_dname + controller_length, 329 "n"); 330 rval = sscanf(dev_path, 331 "/dev/nvme%*[0-9]n%[0-9]p%hu", 332 dki_info->dki_dname + controller_length + 1, 333 &dki_info->dki_partition); 334 } else { 335 strcpy(dki_info->dki_dname, "unknown"); 336 strcpy(dki_info->dki_cname, "unknown"); 337 dki_info->dki_ctype = DKC_UNKNOWN; 338 } 339 340 switch (rval) { 341 case 0: 342 errno = EINVAL; 343 goto error; 344 case 1: 345 dki_info->dki_partition = 0; 346 } 347 348 free(dev_path); 349 350 return (0); 351 error: 352 if (efi_debug) 353 (void) fprintf(stderr, "DKIOCINFO errno 0x%x\n", errno); 354 355 switch (errno) { 356 case EIO: 357 return (VT_EIO); 358 case EINVAL: 359 return (VT_EINVAL); 360 default: 361 return (VT_ERROR); 362 } 363 } 364 365 /* 366 * the number of blocks the EFI label takes up (round up to nearest 367 * block) 368 */ 369 #define NBLOCKS(p, l) (1 + ((((p) * (int)sizeof (efi_gpe_t)) + \ 370 ((l) - 1)) / (l))) 371 /* number of partitions -- limited by what we can malloc */ 372 #define MAX_PARTS ((4294967295UL - sizeof (struct dk_gpt)) / \ 373 sizeof (struct dk_part)) 374 375 int 376 efi_alloc_and_init(int fd, uint32_t nparts, struct dk_gpt **vtoc) 377 { 378 diskaddr_t capacity = 0; 379 uint_t lbsize = 0; 380 uint_t nblocks; 381 size_t length; 382 struct dk_gpt *vptr; 383 struct uuid uuid; 384 struct dk_cinfo dki_info; 385 386 if (read_disk_info(fd, &capacity, &lbsize) != 0) 387 return (-1); 388 389 if (efi_get_info(fd, &dki_info) != 0) 390 return (-1); 391 392 if (dki_info.dki_partition != 0) 393 return (-1); 394 395 if ((dki_info.dki_ctype == DKC_PCMCIA_MEM) || 396 (dki_info.dki_ctype == DKC_VBD) || 397 (dki_info.dki_ctype == DKC_UNKNOWN)) 398 return (-1); 399 400 nblocks = NBLOCKS(nparts, lbsize); 401 if ((nblocks * lbsize) < EFI_MIN_ARRAY_SIZE + lbsize) { 402 /* 16K plus one block for the GPT */ 403 nblocks = EFI_MIN_ARRAY_SIZE / lbsize + 1; 404 } 405 406 if (nparts > MAX_PARTS) { 407 if (efi_debug) { 408 (void) fprintf(stderr, 409 "the maximum number of partitions supported is %lu\n", 410 MAX_PARTS); 411 } 412 return (-1); 413 } 414 415 length = sizeof (struct dk_gpt) + 416 sizeof (struct dk_part) * (nparts - 1); 417 418 vptr = calloc(1, length); 419 if (vptr == NULL) 420 return (-1); 421 422 *vtoc = vptr; 423 424 vptr->efi_version = EFI_VERSION_CURRENT; 425 vptr->efi_lbasize = lbsize; 426 vptr->efi_nparts = nparts; 427 /* 428 * add one block here for the PMBR; on disks with a 512 byte 429 * block size and 128 or fewer partitions, efi_first_u_lba 430 * should work out to "34" 431 */ 432 vptr->efi_first_u_lba = nblocks + 1; 433 vptr->efi_last_lba = capacity - 1; 434 vptr->efi_altern_lba = capacity -1; 435 vptr->efi_last_u_lba = vptr->efi_last_lba - nblocks; 436 437 (void) uuid_generate((uchar_t *)&uuid); 438 UUID_LE_CONVERT(vptr->efi_disk_uguid, uuid); 439 return (0); 440 } 441 442 /* 443 * Read EFI - return partition number upon success. 444 */ 445 int 446 efi_alloc_and_read(int fd, struct dk_gpt **vtoc) 447 { 448 int rval; 449 uint32_t nparts; 450 int length; 451 struct dk_gpt *vptr; 452 453 /* figure out the number of entries that would fit into 16K */ 454 nparts = EFI_MIN_ARRAY_SIZE / sizeof (efi_gpe_t); 455 length = (int) sizeof (struct dk_gpt) + 456 (int) sizeof (struct dk_part) * (nparts - 1); 457 vptr = calloc(1, length); 458 459 if (vptr == NULL) 460 return (VT_ERROR); 461 462 vptr->efi_nparts = nparts; 463 rval = efi_read(fd, vptr); 464 465 if ((rval == VT_EINVAL) && vptr->efi_nparts > nparts) { 466 void *tmp; 467 length = (int) sizeof (struct dk_gpt) + 468 (int) sizeof (struct dk_part) * (vptr->efi_nparts - 1); 469 nparts = vptr->efi_nparts; 470 if ((tmp = realloc(vptr, length)) == NULL) { 471 free(vptr); 472 *vtoc = NULL; 473 return (VT_ERROR); 474 } else { 475 vptr = tmp; 476 rval = efi_read(fd, vptr); 477 } 478 } 479 480 if (rval < 0) { 481 if (efi_debug) { 482 (void) fprintf(stderr, 483 "read of EFI table failed, rval=%d\n", rval); 484 } 485 free(vptr); 486 *vtoc = NULL; 487 } else { 488 *vtoc = vptr; 489 } 490 491 return (rval); 492 } 493 494 static int 495 efi_ioctl(int fd, int cmd, dk_efi_t *dk_ioc) 496 { 497 void *data = dk_ioc->dki_data; 498 int error; 499 diskaddr_t capacity; 500 uint_t lbsize; 501 502 /* 503 * When the IO is not being performed in kernel as an ioctl we need 504 * to know the sector size so we can seek to the proper byte offset. 505 */ 506 if (read_disk_info(fd, &capacity, &lbsize) == -1) { 507 if (efi_debug) 508 fprintf(stderr, "unable to read disk info: %d", errno); 509 510 errno = EIO; 511 return (-1); 512 } 513 514 switch (cmd) { 515 case DKIOCGETEFI: 516 if (lbsize == 0) { 517 if (efi_debug) 518 (void) fprintf(stderr, "DKIOCGETEFI assuming " 519 "LBA %d bytes\n", DEV_BSIZE); 520 521 lbsize = DEV_BSIZE; 522 } 523 524 error = lseek(fd, dk_ioc->dki_lba * lbsize, SEEK_SET); 525 if (error == -1) { 526 if (efi_debug) 527 (void) fprintf(stderr, "DKIOCGETEFI lseek " 528 "error: %d\n", errno); 529 return (error); 530 } 531 532 error = read(fd, data, dk_ioc->dki_length); 533 if (error == -1) { 534 if (efi_debug) 535 (void) fprintf(stderr, "DKIOCGETEFI read " 536 "error: %d\n", errno); 537 return (error); 538 } 539 540 if (error != dk_ioc->dki_length) { 541 if (efi_debug) 542 (void) fprintf(stderr, "DKIOCGETEFI short " 543 "read of %d bytes\n", error); 544 errno = EIO; 545 return (-1); 546 } 547 error = 0; 548 break; 549 550 case DKIOCSETEFI: 551 if (lbsize == 0) { 552 if (efi_debug) 553 (void) fprintf(stderr, "DKIOCSETEFI unknown " 554 "LBA size\n"); 555 errno = EIO; 556 return (-1); 557 } 558 559 error = lseek(fd, dk_ioc->dki_lba * lbsize, SEEK_SET); 560 if (error == -1) { 561 if (efi_debug) 562 (void) fprintf(stderr, "DKIOCSETEFI lseek " 563 "error: %d\n", errno); 564 return (error); 565 } 566 567 error = write(fd, data, dk_ioc->dki_length); 568 if (error == -1) { 569 if (efi_debug) 570 (void) fprintf(stderr, "DKIOCSETEFI write " 571 "error: %d\n", errno); 572 return (error); 573 } 574 575 if (error != dk_ioc->dki_length) { 576 if (efi_debug) 577 (void) fprintf(stderr, "DKIOCSETEFI short " 578 "write of %d bytes\n", error); 579 errno = EIO; 580 return (-1); 581 } 582 583 /* Sync the new EFI table to disk */ 584 error = fsync(fd); 585 if (error == -1) 586 return (error); 587 588 /* Ensure any local disk cache is also flushed */ 589 if (ioctl(fd, BLKFLSBUF, 0) == -1) 590 return (error); 591 592 error = 0; 593 break; 594 595 default: 596 if (efi_debug) 597 (void) fprintf(stderr, "unsupported ioctl()\n"); 598 599 errno = EIO; 600 return (-1); 601 } 602 603 return (error); 604 } 605 606 int 607 efi_rescan(int fd) 608 { 609 int retry = 10; 610 int error; 611 612 /* Notify the kernel a devices partition table has been updated */ 613 while ((error = ioctl(fd, BLKRRPART)) != 0) { 614 if ((--retry == 0) || (errno != EBUSY)) { 615 (void) fprintf(stderr, "the kernel failed to rescan " 616 "the partition table: %d\n", errno); 617 return (-1); 618 } 619 usleep(50000); 620 } 621 622 return (0); 623 } 624 625 static int 626 check_label(int fd, dk_efi_t *dk_ioc) 627 { 628 efi_gpt_t *efi; 629 uint_t crc; 630 631 if (efi_ioctl(fd, DKIOCGETEFI, dk_ioc) == -1) { 632 switch (errno) { 633 case EIO: 634 return (VT_EIO); 635 default: 636 return (VT_ERROR); 637 } 638 } 639 efi = dk_ioc->dki_data; 640 if (efi->efi_gpt_Signature != LE_64(EFI_SIGNATURE)) { 641 if (efi_debug) 642 (void) fprintf(stderr, 643 "Bad EFI signature: 0x%llx != 0x%llx\n", 644 (long long)efi->efi_gpt_Signature, 645 (long long)LE_64(EFI_SIGNATURE)); 646 return (VT_EINVAL); 647 } 648 649 /* 650 * check CRC of the header; the size of the header should 651 * never be larger than one block 652 */ 653 crc = efi->efi_gpt_HeaderCRC32; 654 efi->efi_gpt_HeaderCRC32 = 0; 655 len_t headerSize = (len_t)LE_32(efi->efi_gpt_HeaderSize); 656 657 if (headerSize < EFI_MIN_LABEL_SIZE || headerSize > EFI_LABEL_SIZE) { 658 if (efi_debug) 659 (void) fprintf(stderr, 660 "Invalid EFI HeaderSize %llu. Assuming %d.\n", 661 headerSize, EFI_MIN_LABEL_SIZE); 662 } 663 664 if ((headerSize > dk_ioc->dki_length) || 665 crc != LE_32(efi_crc32((unsigned char *)efi, headerSize))) { 666 if (efi_debug) 667 (void) fprintf(stderr, 668 "Bad EFI CRC: 0x%x != 0x%x\n", 669 crc, LE_32(efi_crc32((unsigned char *)efi, 670 headerSize))); 671 return (VT_EINVAL); 672 } 673 674 return (0); 675 } 676 677 static int 678 efi_read(int fd, struct dk_gpt *vtoc) 679 { 680 int i, j; 681 int label_len; 682 int rval = 0; 683 int md_flag = 0; 684 int vdc_flag = 0; 685 diskaddr_t capacity = 0; 686 uint_t lbsize = 0; 687 struct dk_minfo disk_info; 688 dk_efi_t dk_ioc; 689 efi_gpt_t *efi; 690 efi_gpe_t *efi_parts; 691 struct dk_cinfo dki_info; 692 uint32_t user_length; 693 boolean_t legacy_label = B_FALSE; 694 695 /* 696 * get the partition number for this file descriptor. 697 */ 698 if ((rval = efi_get_info(fd, &dki_info)) != 0) 699 return (rval); 700 701 if ((strncmp(dki_info.dki_cname, "pseudo", 7) == 0) && 702 (strncmp(dki_info.dki_dname, "md", 3) == 0)) { 703 md_flag++; 704 } else if ((strncmp(dki_info.dki_cname, "vdc", 4) == 0) && 705 (strncmp(dki_info.dki_dname, "vdc", 4) == 0)) { 706 /* 707 * The controller and drive name "vdc" (virtual disk client) 708 * indicates a LDoms virtual disk. 709 */ 710 vdc_flag++; 711 } 712 713 /* get the LBA size */ 714 if (read_disk_info(fd, &capacity, &lbsize) == -1) { 715 if (efi_debug) { 716 (void) fprintf(stderr, 717 "unable to read disk info: %d", 718 errno); 719 } 720 return (VT_EINVAL); 721 } 722 723 disk_info.dki_lbsize = lbsize; 724 disk_info.dki_capacity = capacity; 725 726 if (disk_info.dki_lbsize == 0) { 727 if (efi_debug) { 728 (void) fprintf(stderr, 729 "efi_read: assuming LBA 512 bytes\n"); 730 } 731 disk_info.dki_lbsize = DEV_BSIZE; 732 } 733 /* 734 * Read the EFI GPT to figure out how many partitions we need 735 * to deal with. 736 */ 737 dk_ioc.dki_lba = 1; 738 if (NBLOCKS(vtoc->efi_nparts, disk_info.dki_lbsize) < 34) { 739 label_len = EFI_MIN_ARRAY_SIZE + disk_info.dki_lbsize; 740 } else { 741 label_len = vtoc->efi_nparts * (int) sizeof (efi_gpe_t) + 742 disk_info.dki_lbsize; 743 if (label_len % disk_info.dki_lbsize) { 744 /* pad to physical sector size */ 745 label_len += disk_info.dki_lbsize; 746 label_len &= ~(disk_info.dki_lbsize - 1); 747 } 748 } 749 750 if (posix_memalign((void **)&dk_ioc.dki_data, 751 disk_info.dki_lbsize, label_len)) 752 return (VT_ERROR); 753 754 memset(dk_ioc.dki_data, 0, label_len); 755 dk_ioc.dki_length = disk_info.dki_lbsize; 756 user_length = vtoc->efi_nparts; 757 efi = dk_ioc.dki_data; 758 if (md_flag) { 759 dk_ioc.dki_length = label_len; 760 if (efi_ioctl(fd, DKIOCGETEFI, &dk_ioc) == -1) { 761 switch (errno) { 762 case EIO: 763 return (VT_EIO); 764 default: 765 return (VT_ERROR); 766 } 767 } 768 } else if ((rval = check_label(fd, &dk_ioc)) == VT_EINVAL) { 769 /* 770 * No valid label here; try the alternate. Note that here 771 * we just read GPT header and save it into dk_ioc.data, 772 * Later, we will read GUID partition entry array if we 773 * can get valid GPT header. 774 */ 775 776 /* 777 * This is a workaround for legacy systems. In the past, the 778 * last sector of SCSI disk was invisible on x86 platform. At 779 * that time, backup label was saved on the next to the last 780 * sector. It is possible for users to move a disk from previous 781 * solaris system to present system. Here, we attempt to search 782 * legacy backup EFI label first. 783 */ 784 dk_ioc.dki_lba = disk_info.dki_capacity - 2; 785 dk_ioc.dki_length = disk_info.dki_lbsize; 786 rval = check_label(fd, &dk_ioc); 787 if (rval == VT_EINVAL) { 788 /* 789 * we didn't find legacy backup EFI label, try to 790 * search backup EFI label in the last block. 791 */ 792 dk_ioc.dki_lba = disk_info.dki_capacity - 1; 793 dk_ioc.dki_length = disk_info.dki_lbsize; 794 rval = check_label(fd, &dk_ioc); 795 if (rval == 0) { 796 legacy_label = B_TRUE; 797 if (efi_debug) 798 (void) fprintf(stderr, 799 "efi_read: primary label corrupt; " 800 "using EFI backup label located on" 801 " the last block\n"); 802 } 803 } else { 804 if ((efi_debug) && (rval == 0)) 805 (void) fprintf(stderr, "efi_read: primary label" 806 " corrupt; using legacy EFI backup label " 807 " located on the next to last block\n"); 808 } 809 810 if (rval == 0) { 811 dk_ioc.dki_lba = LE_64(efi->efi_gpt_PartitionEntryLBA); 812 vtoc->efi_flags |= EFI_GPT_PRIMARY_CORRUPT; 813 vtoc->efi_nparts = 814 LE_32(efi->efi_gpt_NumberOfPartitionEntries); 815 /* 816 * Partition tables are between backup GPT header 817 * table and ParitionEntryLBA (the starting LBA of 818 * the GUID partition entries array). Now that we 819 * already got valid GPT header and saved it in 820 * dk_ioc.dki_data, we try to get GUID partition 821 * entry array here. 822 */ 823 /* LINTED */ 824 dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data 825 + disk_info.dki_lbsize); 826 if (legacy_label) 827 dk_ioc.dki_length = disk_info.dki_capacity - 1 - 828 dk_ioc.dki_lba; 829 else 830 dk_ioc.dki_length = disk_info.dki_capacity - 2 - 831 dk_ioc.dki_lba; 832 dk_ioc.dki_length *= disk_info.dki_lbsize; 833 if (dk_ioc.dki_length > 834 ((len_t)label_len - sizeof (*dk_ioc.dki_data))) { 835 rval = VT_EINVAL; 836 } else { 837 /* 838 * read GUID partition entry array 839 */ 840 rval = efi_ioctl(fd, DKIOCGETEFI, &dk_ioc); 841 } 842 } 843 844 } else if (rval == 0) { 845 846 dk_ioc.dki_lba = LE_64(efi->efi_gpt_PartitionEntryLBA); 847 /* LINTED */ 848 dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data 849 + disk_info.dki_lbsize); 850 dk_ioc.dki_length = label_len - disk_info.dki_lbsize; 851 rval = efi_ioctl(fd, DKIOCGETEFI, &dk_ioc); 852 853 } else if (vdc_flag && rval == VT_ERROR && errno == EINVAL) { 854 /* 855 * When the device is a LDoms virtual disk, the DKIOCGETEFI 856 * ioctl can fail with EINVAL if the virtual disk backend 857 * is a ZFS volume serviced by a domain running an old version 858 * of Solaris. This is because the DKIOCGETEFI ioctl was 859 * initially incorrectly implemented for a ZFS volume and it 860 * expected the GPT and GPE to be retrieved with a single ioctl. 861 * So we try to read the GPT and the GPE using that old style 862 * ioctl. 863 */ 864 dk_ioc.dki_lba = 1; 865 dk_ioc.dki_length = label_len; 866 rval = check_label(fd, &dk_ioc); 867 } 868 869 if (rval < 0) { 870 free(efi); 871 return (rval); 872 } 873 874 /* LINTED -- always longlong aligned */ 875 efi_parts = (efi_gpe_t *)(((char *)efi) + disk_info.dki_lbsize); 876 877 /* 878 * Assemble this into a "dk_gpt" struct for easier 879 * digestibility by applications. 880 */ 881 vtoc->efi_version = LE_32(efi->efi_gpt_Revision); 882 vtoc->efi_nparts = LE_32(efi->efi_gpt_NumberOfPartitionEntries); 883 vtoc->efi_part_size = LE_32(efi->efi_gpt_SizeOfPartitionEntry); 884 vtoc->efi_lbasize = disk_info.dki_lbsize; 885 vtoc->efi_last_lba = disk_info.dki_capacity - 1; 886 vtoc->efi_first_u_lba = LE_64(efi->efi_gpt_FirstUsableLBA); 887 vtoc->efi_last_u_lba = LE_64(efi->efi_gpt_LastUsableLBA); 888 vtoc->efi_altern_lba = LE_64(efi->efi_gpt_AlternateLBA); 889 UUID_LE_CONVERT(vtoc->efi_disk_uguid, efi->efi_gpt_DiskGUID); 890 891 /* 892 * If the array the user passed in is too small, set the length 893 * to what it needs to be and return 894 */ 895 if (user_length < vtoc->efi_nparts) { 896 return (VT_EINVAL); 897 } 898 899 for (i = 0; i < vtoc->efi_nparts; i++) { 900 901 UUID_LE_CONVERT(vtoc->efi_parts[i].p_guid, 902 efi_parts[i].efi_gpe_PartitionTypeGUID); 903 904 for (j = 0; 905 j < sizeof (conversion_array) 906 / sizeof (struct uuid_to_ptag); j++) { 907 908 if (bcmp(&vtoc->efi_parts[i].p_guid, 909 &conversion_array[j].uuid, 910 sizeof (struct uuid)) == 0) { 911 vtoc->efi_parts[i].p_tag = j; 912 break; 913 } 914 } 915 if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED) 916 continue; 917 vtoc->efi_parts[i].p_flag = 918 LE_16(efi_parts[i].efi_gpe_Attributes.PartitionAttrs); 919 vtoc->efi_parts[i].p_start = 920 LE_64(efi_parts[i].efi_gpe_StartingLBA); 921 vtoc->efi_parts[i].p_size = 922 LE_64(efi_parts[i].efi_gpe_EndingLBA) - 923 vtoc->efi_parts[i].p_start + 1; 924 for (j = 0; j < EFI_PART_NAME_LEN; j++) { 925 vtoc->efi_parts[i].p_name[j] = 926 (uchar_t)LE_16( 927 efi_parts[i].efi_gpe_PartitionName[j]); 928 } 929 930 UUID_LE_CONVERT(vtoc->efi_parts[i].p_uguid, 931 efi_parts[i].efi_gpe_UniquePartitionGUID); 932 } 933 free(efi); 934 935 return (dki_info.dki_partition); 936 } 937 938 /* writes a "protective" MBR */ 939 static int 940 write_pmbr(int fd, struct dk_gpt *vtoc) 941 { 942 dk_efi_t dk_ioc; 943 struct mboot mb; 944 uchar_t *cp; 945 diskaddr_t size_in_lba; 946 uchar_t *buf; 947 int len; 948 949 len = (vtoc->efi_lbasize == 0) ? sizeof (mb) : vtoc->efi_lbasize; 950 if (posix_memalign((void **)&buf, len, len)) 951 return (VT_ERROR); 952 953 /* 954 * Preserve any boot code and disk signature if the first block is 955 * already an MBR. 956 */ 957 memset(buf, 0, len); 958 dk_ioc.dki_lba = 0; 959 dk_ioc.dki_length = len; 960 /* LINTED -- always longlong aligned */ 961 dk_ioc.dki_data = (efi_gpt_t *)buf; 962 if (efi_ioctl(fd, DKIOCGETEFI, &dk_ioc) == -1) { 963 (void) memcpy(&mb, buf, sizeof (mb)); 964 bzero(&mb, sizeof (mb)); 965 mb.signature = LE_16(MBB_MAGIC); 966 } else { 967 (void) memcpy(&mb, buf, sizeof (mb)); 968 if (mb.signature != LE_16(MBB_MAGIC)) { 969 bzero(&mb, sizeof (mb)); 970 mb.signature = LE_16(MBB_MAGIC); 971 } 972 } 973 974 bzero(&mb.parts, sizeof (mb.parts)); 975 cp = (uchar_t *)&mb.parts[0]; 976 /* bootable or not */ 977 *cp++ = 0; 978 /* beginning CHS; 0xffffff if not representable */ 979 *cp++ = 0xff; 980 *cp++ = 0xff; 981 *cp++ = 0xff; 982 /* OS type */ 983 *cp++ = EFI_PMBR; 984 /* ending CHS; 0xffffff if not representable */ 985 *cp++ = 0xff; 986 *cp++ = 0xff; 987 *cp++ = 0xff; 988 /* starting LBA: 1 (little endian format) by EFI definition */ 989 *cp++ = 0x01; 990 *cp++ = 0x00; 991 *cp++ = 0x00; 992 *cp++ = 0x00; 993 /* ending LBA: last block on the disk (little endian format) */ 994 size_in_lba = vtoc->efi_last_lba; 995 if (size_in_lba < 0xffffffff) { 996 *cp++ = (size_in_lba & 0x000000ff); 997 *cp++ = (size_in_lba & 0x0000ff00) >> 8; 998 *cp++ = (size_in_lba & 0x00ff0000) >> 16; 999 *cp++ = (size_in_lba & 0xff000000) >> 24; 1000 } else { 1001 *cp++ = 0xff; 1002 *cp++ = 0xff; 1003 *cp++ = 0xff; 1004 *cp++ = 0xff; 1005 } 1006 1007 (void) memcpy(buf, &mb, sizeof (mb)); 1008 /* LINTED -- always longlong aligned */ 1009 dk_ioc.dki_data = (efi_gpt_t *)buf; 1010 dk_ioc.dki_lba = 0; 1011 dk_ioc.dki_length = len; 1012 if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) { 1013 free(buf); 1014 switch (errno) { 1015 case EIO: 1016 return (VT_EIO); 1017 case EINVAL: 1018 return (VT_EINVAL); 1019 default: 1020 return (VT_ERROR); 1021 } 1022 } 1023 free(buf); 1024 return (0); 1025 } 1026 1027 /* make sure the user specified something reasonable */ 1028 static int 1029 check_input(struct dk_gpt *vtoc) 1030 { 1031 int resv_part = -1; 1032 int i, j; 1033 diskaddr_t istart, jstart, isize, jsize, endsect; 1034 1035 /* 1036 * Sanity-check the input (make sure no partitions overlap) 1037 */ 1038 for (i = 0; i < vtoc->efi_nparts; i++) { 1039 /* It can't be unassigned and have an actual size */ 1040 if ((vtoc->efi_parts[i].p_tag == V_UNASSIGNED) && 1041 (vtoc->efi_parts[i].p_size != 0)) { 1042 if (efi_debug) { 1043 (void) fprintf(stderr, "partition %d is " 1044 "\"unassigned\" but has a size of %llu", 1045 i, vtoc->efi_parts[i].p_size); 1046 } 1047 return (VT_EINVAL); 1048 } 1049 if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED) { 1050 if (uuid_is_null((uchar_t *)&vtoc->efi_parts[i].p_guid)) 1051 continue; 1052 /* we have encountered an unknown uuid */ 1053 vtoc->efi_parts[i].p_tag = 0xff; 1054 } 1055 if (vtoc->efi_parts[i].p_tag == V_RESERVED) { 1056 if (resv_part != -1) { 1057 if (efi_debug) { 1058 (void) fprintf(stderr, "found " 1059 "duplicate reserved partition " 1060 "at %d\n", i); 1061 } 1062 return (VT_EINVAL); 1063 } 1064 resv_part = i; 1065 } 1066 if ((vtoc->efi_parts[i].p_start < vtoc->efi_first_u_lba) || 1067 (vtoc->efi_parts[i].p_start > vtoc->efi_last_u_lba)) { 1068 if (efi_debug) { 1069 (void) fprintf(stderr, 1070 "Partition %d starts at %llu. ", 1071 i, 1072 vtoc->efi_parts[i].p_start); 1073 (void) fprintf(stderr, 1074 "It must be between %llu and %llu.\n", 1075 vtoc->efi_first_u_lba, 1076 vtoc->efi_last_u_lba); 1077 } 1078 return (VT_EINVAL); 1079 } 1080 if ((vtoc->efi_parts[i].p_start + 1081 vtoc->efi_parts[i].p_size < 1082 vtoc->efi_first_u_lba) || 1083 (vtoc->efi_parts[i].p_start + 1084 vtoc->efi_parts[i].p_size > 1085 vtoc->efi_last_u_lba + 1)) { 1086 if (efi_debug) { 1087 (void) fprintf(stderr, 1088 "Partition %d ends at %llu. ", 1089 i, 1090 vtoc->efi_parts[i].p_start + 1091 vtoc->efi_parts[i].p_size); 1092 (void) fprintf(stderr, 1093 "It must be between %llu and %llu.\n", 1094 vtoc->efi_first_u_lba, 1095 vtoc->efi_last_u_lba); 1096 } 1097 return (VT_EINVAL); 1098 } 1099 1100 for (j = 0; j < vtoc->efi_nparts; j++) { 1101 isize = vtoc->efi_parts[i].p_size; 1102 jsize = vtoc->efi_parts[j].p_size; 1103 istart = vtoc->efi_parts[i].p_start; 1104 jstart = vtoc->efi_parts[j].p_start; 1105 if ((i != j) && (isize != 0) && (jsize != 0)) { 1106 endsect = jstart + jsize -1; 1107 if ((jstart <= istart) && 1108 (istart <= endsect)) { 1109 if (efi_debug) { 1110 (void) fprintf(stderr, 1111 "Partition %d overlaps " 1112 "partition %d.", i, j); 1113 } 1114 return (VT_EINVAL); 1115 } 1116 } 1117 } 1118 } 1119 /* just a warning for now */ 1120 if ((resv_part == -1) && efi_debug) { 1121 (void) fprintf(stderr, 1122 "no reserved partition found\n"); 1123 } 1124 return (0); 1125 } 1126 1127 static int 1128 call_blkpg_ioctl(int fd, int command, diskaddr_t start, 1129 diskaddr_t size, uint_t pno) 1130 { 1131 struct blkpg_ioctl_arg ioctl_arg; 1132 struct blkpg_partition linux_part; 1133 memset(&linux_part, 0, sizeof (linux_part)); 1134 1135 char *path = efi_get_devname(fd); 1136 if (path == NULL) { 1137 (void) fprintf(stderr, "failed to retrieve device name\n"); 1138 return (VT_EINVAL); 1139 } 1140 1141 linux_part.start = start; 1142 linux_part.length = size; 1143 linux_part.pno = pno; 1144 snprintf(linux_part.devname, BLKPG_DEVNAMELTH - 1, "%s%u", path, pno); 1145 linux_part.devname[BLKPG_DEVNAMELTH - 1] = '\0'; 1146 free(path); 1147 1148 ioctl_arg.op = command; 1149 ioctl_arg.flags = 0; 1150 ioctl_arg.datalen = sizeof (struct blkpg_partition); 1151 ioctl_arg.data = &linux_part; 1152 1153 return (ioctl(fd, BLKPG, &ioctl_arg)); 1154 } 1155 1156 /* 1157 * add all the unallocated space to the current label 1158 */ 1159 int 1160 efi_use_whole_disk(int fd) 1161 { 1162 struct dk_gpt *efi_label = NULL; 1163 int rval; 1164 int i; 1165 uint_t resv_index = 0, data_index = 0; 1166 diskaddr_t resv_start = 0, data_start = 0; 1167 diskaddr_t data_size, limit, difference; 1168 boolean_t sync_needed = B_FALSE; 1169 uint_t nblocks; 1170 1171 rval = efi_alloc_and_read(fd, &efi_label); 1172 if (rval < 0) { 1173 if (efi_label != NULL) 1174 efi_free(efi_label); 1175 return (rval); 1176 } 1177 1178 /* 1179 * Find the last physically non-zero partition. 1180 * This should be the reserved partition. 1181 */ 1182 for (i = 0; i < efi_label->efi_nparts; i ++) { 1183 if (resv_start < efi_label->efi_parts[i].p_start) { 1184 resv_start = efi_label->efi_parts[i].p_start; 1185 resv_index = i; 1186 } 1187 } 1188 1189 /* 1190 * Find the last physically non-zero partition before that. 1191 * This is the data partition. 1192 */ 1193 for (i = 0; i < resv_index; i ++) { 1194 if (data_start < efi_label->efi_parts[i].p_start) { 1195 data_start = efi_label->efi_parts[i].p_start; 1196 data_index = i; 1197 } 1198 } 1199 data_size = efi_label->efi_parts[data_index].p_size; 1200 1201 /* 1202 * See the "efi_alloc_and_init" function for more information 1203 * about where this "nblocks" value comes from. 1204 */ 1205 nblocks = efi_label->efi_first_u_lba - 1; 1206 1207 /* 1208 * Determine if the EFI label is out of sync. We check that: 1209 * 1210 * 1. the data partition ends at the limit we set, and 1211 * 2. the reserved partition starts at the limit we set. 1212 * 1213 * If either of these conditions is not met, then we need to 1214 * resync the EFI label. 1215 * 1216 * The limit is the last usable LBA, determined by the last LBA 1217 * and the first usable LBA fields on the EFI label of the disk 1218 * (see the lines directly above). Additionally, we factor in 1219 * EFI_MIN_RESV_SIZE (per its use in "zpool_label_disk") and 1220 * P2ALIGN it to ensure the partition boundaries are aligned 1221 * (for performance reasons). The alignment should match the 1222 * alignment used by the "zpool_label_disk" function. 1223 */ 1224 limit = P2ALIGN(efi_label->efi_last_lba - nblocks - EFI_MIN_RESV_SIZE, 1225 PARTITION_END_ALIGNMENT); 1226 if (data_start + data_size != limit || resv_start != limit) 1227 sync_needed = B_TRUE; 1228 1229 if (efi_debug && sync_needed) 1230 (void) fprintf(stderr, "efi_use_whole_disk: sync needed\n"); 1231 1232 /* 1233 * If alter_lba is 1, we are using the backup label. 1234 * Since we can locate the backup label by disk capacity, 1235 * there must be no unallocated space. 1236 */ 1237 if ((efi_label->efi_altern_lba == 1) || (efi_label->efi_altern_lba 1238 >= efi_label->efi_last_lba && !sync_needed)) { 1239 if (efi_debug) { 1240 (void) fprintf(stderr, 1241 "efi_use_whole_disk: requested space not found\n"); 1242 } 1243 efi_free(efi_label); 1244 return (VT_ENOSPC); 1245 } 1246 1247 /* 1248 * Verify that we've found the reserved partition by checking 1249 * that it looks the way it did when we created it in zpool_label_disk. 1250 * If we've found the incorrect partition, then we know that this 1251 * device was reformatted and no longer is solely used by ZFS. 1252 */ 1253 if ((efi_label->efi_parts[resv_index].p_size != EFI_MIN_RESV_SIZE) || 1254 (efi_label->efi_parts[resv_index].p_tag != V_RESERVED) || 1255 (resv_index != 8)) { 1256 if (efi_debug) { 1257 (void) fprintf(stderr, 1258 "efi_use_whole_disk: wholedisk not available\n"); 1259 } 1260 efi_free(efi_label); 1261 return (VT_ENOSPC); 1262 } 1263 1264 if (data_start + data_size != resv_start) { 1265 if (efi_debug) { 1266 (void) fprintf(stderr, 1267 "efi_use_whole_disk: " 1268 "data_start (%lli) + " 1269 "data_size (%lli) != " 1270 "resv_start (%lli)\n", 1271 data_start, data_size, resv_start); 1272 } 1273 1274 return (VT_EINVAL); 1275 } 1276 1277 if (limit < resv_start) { 1278 if (efi_debug) { 1279 (void) fprintf(stderr, 1280 "efi_use_whole_disk: " 1281 "limit (%lli) < resv_start (%lli)\n", 1282 limit, resv_start); 1283 } 1284 1285 return (VT_EINVAL); 1286 } 1287 1288 difference = limit - resv_start; 1289 1290 if (efi_debug) 1291 (void) fprintf(stderr, 1292 "efi_use_whole_disk: difference is %lli\n", difference); 1293 1294 /* 1295 * Move the reserved partition. There is currently no data in 1296 * here except fabricated devids (which get generated via 1297 * efi_write()). So there is no need to copy data. 1298 */ 1299 efi_label->efi_parts[data_index].p_size += difference; 1300 efi_label->efi_parts[resv_index].p_start += difference; 1301 efi_label->efi_last_u_lba = efi_label->efi_last_lba - nblocks; 1302 1303 /* 1304 * Rescanning the partition table in the kernel can result 1305 * in the device links to be removed (see comment in vdev_disk_open). 1306 * If BLKPG_RESIZE_PARTITION is available, then we can resize 1307 * the partition table online and avoid having to remove the device 1308 * links used by the pool. This provides a very deterministic 1309 * approach to resizing devices and does not require any 1310 * loops waiting for devices to reappear. 1311 */ 1312 #ifdef BLKPG_RESIZE_PARTITION 1313 /* 1314 * Delete the reserved partition since we're about to expand 1315 * the data partition and it would overlap with the reserved 1316 * partition. 1317 * NOTE: The starting index for the ioctl is 1 while for the 1318 * EFI partitions it's 0. For that reason we have to add one 1319 * whenever we make an ioctl call. 1320 */ 1321 rval = call_blkpg_ioctl(fd, BLKPG_DEL_PARTITION, 0, 0, resv_index + 1); 1322 if (rval != 0) 1323 goto out; 1324 1325 /* 1326 * Expand the data partition 1327 */ 1328 rval = call_blkpg_ioctl(fd, BLKPG_RESIZE_PARTITION, 1329 efi_label->efi_parts[data_index].p_start * efi_label->efi_lbasize, 1330 efi_label->efi_parts[data_index].p_size * efi_label->efi_lbasize, 1331 data_index + 1); 1332 if (rval != 0) { 1333 (void) fprintf(stderr, "Unable to resize data " 1334 "partition: %d\n", rval); 1335 /* 1336 * Since we failed to resize, we need to reset the start 1337 * of the reserve partition and re-create it. 1338 */ 1339 efi_label->efi_parts[resv_index].p_start -= difference; 1340 } 1341 1342 /* 1343 * Re-add the reserved partition. If we've expanded the data partition 1344 * then we'll move the reserve partition to the end of the data 1345 * partition. Otherwise, we'll recreate the partition in its original 1346 * location. Note that we do this as best-effort and ignore any 1347 * errors that may arise here. This will ensure that we finish writing 1348 * the EFI label. 1349 */ 1350 (void) call_blkpg_ioctl(fd, BLKPG_ADD_PARTITION, 1351 efi_label->efi_parts[resv_index].p_start * efi_label->efi_lbasize, 1352 efi_label->efi_parts[resv_index].p_size * efi_label->efi_lbasize, 1353 resv_index + 1); 1354 #endif 1355 1356 /* 1357 * We're now ready to write the EFI label. 1358 */ 1359 if (rval == 0) { 1360 rval = efi_write(fd, efi_label); 1361 if (rval < 0 && efi_debug) { 1362 (void) fprintf(stderr, "efi_use_whole_disk:fail " 1363 "to write label, rval=%d\n", rval); 1364 } 1365 } 1366 1367 out: 1368 efi_free(efi_label); 1369 return (rval); 1370 } 1371 1372 /* 1373 * write EFI label and backup label 1374 */ 1375 int 1376 efi_write(int fd, struct dk_gpt *vtoc) 1377 { 1378 dk_efi_t dk_ioc; 1379 efi_gpt_t *efi; 1380 efi_gpe_t *efi_parts; 1381 int i, j; 1382 struct dk_cinfo dki_info; 1383 int rval; 1384 int md_flag = 0; 1385 int nblocks; 1386 diskaddr_t lba_backup_gpt_hdr; 1387 1388 if ((rval = efi_get_info(fd, &dki_info)) != 0) 1389 return (rval); 1390 1391 /* check if we are dealing with a metadevice */ 1392 if ((strncmp(dki_info.dki_cname, "pseudo", 7) == 0) && 1393 (strncmp(dki_info.dki_dname, "md", 3) == 0)) { 1394 md_flag = 1; 1395 } 1396 1397 if (check_input(vtoc)) { 1398 /* 1399 * not valid; if it's a metadevice just pass it down 1400 * because SVM will do its own checking 1401 */ 1402 if (md_flag == 0) { 1403 return (VT_EINVAL); 1404 } 1405 } 1406 1407 dk_ioc.dki_lba = 1; 1408 if (NBLOCKS(vtoc->efi_nparts, vtoc->efi_lbasize) < 34) { 1409 dk_ioc.dki_length = EFI_MIN_ARRAY_SIZE + vtoc->efi_lbasize; 1410 } else { 1411 dk_ioc.dki_length = NBLOCKS(vtoc->efi_nparts, 1412 vtoc->efi_lbasize) * 1413 vtoc->efi_lbasize; 1414 } 1415 1416 /* 1417 * the number of blocks occupied by GUID partition entry array 1418 */ 1419 nblocks = dk_ioc.dki_length / vtoc->efi_lbasize - 1; 1420 1421 /* 1422 * Backup GPT header is located on the block after GUID 1423 * partition entry array. Here, we calculate the address 1424 * for backup GPT header. 1425 */ 1426 lba_backup_gpt_hdr = vtoc->efi_last_u_lba + 1 + nblocks; 1427 if (posix_memalign((void **)&dk_ioc.dki_data, 1428 vtoc->efi_lbasize, dk_ioc.dki_length)) 1429 return (VT_ERROR); 1430 1431 memset(dk_ioc.dki_data, 0, dk_ioc.dki_length); 1432 efi = dk_ioc.dki_data; 1433 1434 /* stuff user's input into EFI struct */ 1435 efi->efi_gpt_Signature = LE_64(EFI_SIGNATURE); 1436 efi->efi_gpt_Revision = LE_32(vtoc->efi_version); /* 0x02000100 */ 1437 efi->efi_gpt_HeaderSize = LE_32(sizeof (struct efi_gpt) - LEN_EFI_PAD); 1438 efi->efi_gpt_Reserved1 = 0; 1439 efi->efi_gpt_MyLBA = LE_64(1ULL); 1440 efi->efi_gpt_AlternateLBA = LE_64(lba_backup_gpt_hdr); 1441 efi->efi_gpt_FirstUsableLBA = LE_64(vtoc->efi_first_u_lba); 1442 efi->efi_gpt_LastUsableLBA = LE_64(vtoc->efi_last_u_lba); 1443 efi->efi_gpt_PartitionEntryLBA = LE_64(2ULL); 1444 efi->efi_gpt_NumberOfPartitionEntries = LE_32(vtoc->efi_nparts); 1445 efi->efi_gpt_SizeOfPartitionEntry = LE_32(sizeof (struct efi_gpe)); 1446 UUID_LE_CONVERT(efi->efi_gpt_DiskGUID, vtoc->efi_disk_uguid); 1447 1448 /* LINTED -- always longlong aligned */ 1449 efi_parts = (efi_gpe_t *)((char *)dk_ioc.dki_data + vtoc->efi_lbasize); 1450 1451 for (i = 0; i < vtoc->efi_nparts; i++) { 1452 for (j = 0; 1453 j < sizeof (conversion_array) / 1454 sizeof (struct uuid_to_ptag); j++) { 1455 1456 if (vtoc->efi_parts[i].p_tag == j) { 1457 UUID_LE_CONVERT( 1458 efi_parts[i].efi_gpe_PartitionTypeGUID, 1459 conversion_array[j].uuid); 1460 break; 1461 } 1462 } 1463 1464 if (j == sizeof (conversion_array) / 1465 sizeof (struct uuid_to_ptag)) { 1466 /* 1467 * If we didn't have a matching uuid match, bail here. 1468 * Don't write a label with unknown uuid. 1469 */ 1470 if (efi_debug) { 1471 (void) fprintf(stderr, 1472 "Unknown uuid for p_tag %d\n", 1473 vtoc->efi_parts[i].p_tag); 1474 } 1475 return (VT_EINVAL); 1476 } 1477 1478 /* Zero's should be written for empty partitions */ 1479 if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED) 1480 continue; 1481 1482 efi_parts[i].efi_gpe_StartingLBA = 1483 LE_64(vtoc->efi_parts[i].p_start); 1484 efi_parts[i].efi_gpe_EndingLBA = 1485 LE_64(vtoc->efi_parts[i].p_start + 1486 vtoc->efi_parts[i].p_size - 1); 1487 efi_parts[i].efi_gpe_Attributes.PartitionAttrs = 1488 LE_16(vtoc->efi_parts[i].p_flag); 1489 for (j = 0; j < EFI_PART_NAME_LEN; j++) { 1490 efi_parts[i].efi_gpe_PartitionName[j] = 1491 LE_16((ushort_t)vtoc->efi_parts[i].p_name[j]); 1492 } 1493 if ((vtoc->efi_parts[i].p_tag != V_UNASSIGNED) && 1494 uuid_is_null((uchar_t *)&vtoc->efi_parts[i].p_uguid)) { 1495 (void) uuid_generate((uchar_t *) 1496 &vtoc->efi_parts[i].p_uguid); 1497 } 1498 bcopy(&vtoc->efi_parts[i].p_uguid, 1499 &efi_parts[i].efi_gpe_UniquePartitionGUID, 1500 sizeof (uuid_t)); 1501 } 1502 efi->efi_gpt_PartitionEntryArrayCRC32 = 1503 LE_32(efi_crc32((unsigned char *)efi_parts, 1504 vtoc->efi_nparts * (int)sizeof (struct efi_gpe))); 1505 efi->efi_gpt_HeaderCRC32 = 1506 LE_32(efi_crc32((unsigned char *)efi, 1507 LE_32(efi->efi_gpt_HeaderSize))); 1508 1509 if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) { 1510 free(dk_ioc.dki_data); 1511 switch (errno) { 1512 case EIO: 1513 return (VT_EIO); 1514 case EINVAL: 1515 return (VT_EINVAL); 1516 default: 1517 return (VT_ERROR); 1518 } 1519 } 1520 /* if it's a metadevice we're done */ 1521 if (md_flag) { 1522 free(dk_ioc.dki_data); 1523 return (0); 1524 } 1525 1526 /* write backup partition array */ 1527 dk_ioc.dki_lba = vtoc->efi_last_u_lba + 1; 1528 dk_ioc.dki_length -= vtoc->efi_lbasize; 1529 /* LINTED */ 1530 dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data + 1531 vtoc->efi_lbasize); 1532 1533 if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) { 1534 /* 1535 * we wrote the primary label okay, so don't fail 1536 */ 1537 if (efi_debug) { 1538 (void) fprintf(stderr, 1539 "write of backup partitions to block %llu " 1540 "failed, errno %d\n", 1541 vtoc->efi_last_u_lba + 1, 1542 errno); 1543 } 1544 } 1545 /* 1546 * now swap MyLBA and AlternateLBA fields and write backup 1547 * partition table header 1548 */ 1549 dk_ioc.dki_lba = lba_backup_gpt_hdr; 1550 dk_ioc.dki_length = vtoc->efi_lbasize; 1551 /* LINTED */ 1552 dk_ioc.dki_data = (efi_gpt_t *)((char *)dk_ioc.dki_data - 1553 vtoc->efi_lbasize); 1554 efi->efi_gpt_AlternateLBA = LE_64(1ULL); 1555 efi->efi_gpt_MyLBA = LE_64(lba_backup_gpt_hdr); 1556 efi->efi_gpt_PartitionEntryLBA = LE_64(vtoc->efi_last_u_lba + 1); 1557 efi->efi_gpt_HeaderCRC32 = 0; 1558 efi->efi_gpt_HeaderCRC32 = 1559 LE_32(efi_crc32((unsigned char *)dk_ioc.dki_data, 1560 LE_32(efi->efi_gpt_HeaderSize))); 1561 1562 if (efi_ioctl(fd, DKIOCSETEFI, &dk_ioc) == -1) { 1563 if (efi_debug) { 1564 (void) fprintf(stderr, 1565 "write of backup header to block %llu failed, " 1566 "errno %d\n", 1567 lba_backup_gpt_hdr, 1568 errno); 1569 } 1570 } 1571 /* write the PMBR */ 1572 (void) write_pmbr(fd, vtoc); 1573 free(dk_ioc.dki_data); 1574 1575 return (0); 1576 } 1577 1578 void 1579 efi_free(struct dk_gpt *ptr) 1580 { 1581 free(ptr); 1582 } 1583 1584 /* 1585 * Input: File descriptor 1586 * Output: 1 if disk has an EFI label, or > 2TB with no VTOC or legacy MBR. 1587 * Otherwise 0. 1588 */ 1589 int 1590 efi_type(int fd) 1591 { 1592 #if 0 1593 struct vtoc vtoc; 1594 struct extvtoc extvtoc; 1595 1596 if (ioctl(fd, DKIOCGEXTVTOC, &extvtoc) == -1) { 1597 if (errno == ENOTSUP) 1598 return (1); 1599 else if (errno == ENOTTY) { 1600 if (ioctl(fd, DKIOCGVTOC, &vtoc) == -1) 1601 if (errno == ENOTSUP) 1602 return (1); 1603 } 1604 } 1605 return (0); 1606 #else 1607 return (ENOSYS); 1608 #endif 1609 } 1610 1611 void 1612 efi_err_check(struct dk_gpt *vtoc) 1613 { 1614 int resv_part = -1; 1615 int i, j; 1616 diskaddr_t istart, jstart, isize, jsize, endsect; 1617 int overlap = 0; 1618 1619 /* 1620 * make sure no partitions overlap 1621 */ 1622 for (i = 0; i < vtoc->efi_nparts; i++) { 1623 /* It can't be unassigned and have an actual size */ 1624 if ((vtoc->efi_parts[i].p_tag == V_UNASSIGNED) && 1625 (vtoc->efi_parts[i].p_size != 0)) { 1626 (void) fprintf(stderr, 1627 "partition %d is \"unassigned\" but has a size " 1628 "of %llu\n", i, vtoc->efi_parts[i].p_size); 1629 } 1630 if (vtoc->efi_parts[i].p_tag == V_UNASSIGNED) { 1631 continue; 1632 } 1633 if (vtoc->efi_parts[i].p_tag == V_RESERVED) { 1634 if (resv_part != -1) { 1635 (void) fprintf(stderr, 1636 "found duplicate reserved partition at " 1637 "%d\n", i); 1638 } 1639 resv_part = i; 1640 if (vtoc->efi_parts[i].p_size != EFI_MIN_RESV_SIZE) 1641 (void) fprintf(stderr, 1642 "Warning: reserved partition size must " 1643 "be %d sectors\n", EFI_MIN_RESV_SIZE); 1644 } 1645 if ((vtoc->efi_parts[i].p_start < vtoc->efi_first_u_lba) || 1646 (vtoc->efi_parts[i].p_start > vtoc->efi_last_u_lba)) { 1647 (void) fprintf(stderr, 1648 "Partition %d starts at %llu\n", 1649 i, 1650 vtoc->efi_parts[i].p_start); 1651 (void) fprintf(stderr, 1652 "It must be between %llu and %llu.\n", 1653 vtoc->efi_first_u_lba, 1654 vtoc->efi_last_u_lba); 1655 } 1656 if ((vtoc->efi_parts[i].p_start + 1657 vtoc->efi_parts[i].p_size < 1658 vtoc->efi_first_u_lba) || 1659 (vtoc->efi_parts[i].p_start + 1660 vtoc->efi_parts[i].p_size > 1661 vtoc->efi_last_u_lba + 1)) { 1662 (void) fprintf(stderr, 1663 "Partition %d ends at %llu\n", 1664 i, 1665 vtoc->efi_parts[i].p_start + 1666 vtoc->efi_parts[i].p_size); 1667 (void) fprintf(stderr, 1668 "It must be between %llu and %llu.\n", 1669 vtoc->efi_first_u_lba, 1670 vtoc->efi_last_u_lba); 1671 } 1672 1673 for (j = 0; j < vtoc->efi_nparts; j++) { 1674 isize = vtoc->efi_parts[i].p_size; 1675 jsize = vtoc->efi_parts[j].p_size; 1676 istart = vtoc->efi_parts[i].p_start; 1677 jstart = vtoc->efi_parts[j].p_start; 1678 if ((i != j) && (isize != 0) && (jsize != 0)) { 1679 endsect = jstart + jsize -1; 1680 if ((jstart <= istart) && 1681 (istart <= endsect)) { 1682 if (!overlap) { 1683 (void) fprintf(stderr, 1684 "label error: EFI Labels do not " 1685 "support overlapping partitions\n"); 1686 } 1687 (void) fprintf(stderr, 1688 "Partition %d overlaps partition " 1689 "%d.\n", i, j); 1690 overlap = 1; 1691 } 1692 } 1693 } 1694 } 1695 /* make sure there is a reserved partition */ 1696 if (resv_part == -1) { 1697 (void) fprintf(stderr, 1698 "no reserved partition found\n"); 1699 } 1700 } 1701 1702 /* 1703 * We need to get information necessary to construct a *new* efi 1704 * label type 1705 */ 1706 int 1707 efi_auto_sense(int fd, struct dk_gpt **vtoc) 1708 { 1709 1710 int i; 1711 1712 /* 1713 * Now build the default partition table 1714 */ 1715 if (efi_alloc_and_init(fd, EFI_NUMPAR, vtoc) != 0) { 1716 if (efi_debug) { 1717 (void) fprintf(stderr, "efi_alloc_and_init failed.\n"); 1718 } 1719 return (-1); 1720 } 1721 1722 for (i = 0; i < MIN((*vtoc)->efi_nparts, V_NUMPAR); i++) { 1723 (*vtoc)->efi_parts[i].p_tag = default_vtoc_map[i].p_tag; 1724 (*vtoc)->efi_parts[i].p_flag = default_vtoc_map[i].p_flag; 1725 (*vtoc)->efi_parts[i].p_start = 0; 1726 (*vtoc)->efi_parts[i].p_size = 0; 1727 } 1728 /* 1729 * Make constants first 1730 * and variable partitions later 1731 */ 1732 1733 /* root partition - s0 128 MB */ 1734 (*vtoc)->efi_parts[0].p_start = 34; 1735 (*vtoc)->efi_parts[0].p_size = 262144; 1736 1737 /* partition - s1 128 MB */ 1738 (*vtoc)->efi_parts[1].p_start = 262178; 1739 (*vtoc)->efi_parts[1].p_size = 262144; 1740 1741 /* partition -s2 is NOT the Backup disk */ 1742 (*vtoc)->efi_parts[2].p_tag = V_UNASSIGNED; 1743 1744 /* partition -s6 /usr partition - HOG */ 1745 (*vtoc)->efi_parts[6].p_start = 524322; 1746 (*vtoc)->efi_parts[6].p_size = (*vtoc)->efi_last_u_lba - 524322 1747 - (1024 * 16); 1748 1749 /* efi reserved partition - s9 16K */ 1750 (*vtoc)->efi_parts[8].p_start = (*vtoc)->efi_last_u_lba - (1024 * 16); 1751 (*vtoc)->efi_parts[8].p_size = (1024 * 16); 1752 (*vtoc)->efi_parts[8].p_tag = V_RESERVED; 1753 return (0); 1754 } 1755