1 /* 2 * Copyright (c) 2011-2015 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@dragonflybsd.org> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/types.h> 36 #include <sys/diskslice.h> 37 #include <sys/diskmbr.h> 38 #include <sys/stat.h> 39 #include <sys/time.h> 40 #include <sys/sysctl.h> 41 #include <sys/ioctl.h> 42 #include <vfs/hammer2/hammer2_xxhash.h> 43 #include <vfs/hammer2/hammer2_disk.h> 44 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <stdarg.h> 48 #include <stddef.h> 49 #include <unistd.h> 50 #include <string.h> 51 #include <errno.h> 52 #include <fcntl.h> 53 #include <assert.h> 54 #include <err.h> 55 #include <uuid.h> 56 57 #include "hammer2_subs.h" 58 59 #define MAXLABELS HAMMER2_SET_COUNT 60 61 static hammer2_off_t check_volume(const char *path, int *fdp); 62 static int64_t getsize(const char *str, int64_t minval, int64_t maxval, int pw); 63 static uint64_t nowtime(void); 64 static int blkrefary_cmp(const void *b1, const void *b2); 65 static void usage(void); 66 67 static void format_hammer2(int fd, hammer2_off_t total_space, 68 hammer2_off_t free_space); 69 static void alloc_direct(hammer2_off_t *basep, hammer2_blockref_t *bref, 70 size_t bytes); 71 72 static int Hammer2Version = -1; 73 static uuid_t Hammer2_FSType; /* static filesystem type id for HAMMER2 */ 74 static uuid_t Hammer2_VolFSID; /* unique filesystem id in volu header */ 75 static uuid_t Hammer2_SupCLID; /* PFS cluster id in super-root inode */ 76 static uuid_t Hammer2_SupFSID; /* PFS unique id in super-root inode */ 77 static uuid_t Hammer2_PfsCLID[MAXLABELS]; 78 static uuid_t Hammer2_PfsFSID[MAXLABELS]; 79 static const char *Label[MAXLABELS]; 80 static hammer2_off_t BootAreaSize; 81 static hammer2_off_t AuxAreaSize; 82 static int NLabels; 83 84 int 85 main(int ac, char **av) 86 { 87 uint32_t status; 88 hammer2_off_t total_space; 89 hammer2_off_t free_space; 90 hammer2_off_t reserved_space; 91 int ch; 92 int fd = -1; 93 int i; 94 int defaultlabels = 1; 95 char *vol_fsid = NULL; 96 char *sup_clid_name = NULL; 97 char *sup_fsid_name = NULL; 98 char *pfs_clid_name = NULL; 99 char *pfs_fsid_name = NULL; 100 101 Label[NLabels++] = "LOCAL"; 102 103 /* 104 * Sanity check basic filesystem structures. No cookies for us 105 * if it gets broken! 106 */ 107 assert(sizeof(hammer2_volume_data_t) == HAMMER2_VOLUME_BYTES); 108 assert(sizeof(hammer2_inode_data_t) == HAMMER2_INODE_BYTES); 109 assert(sizeof(hammer2_blockref_t) == HAMMER2_BLOCKREF_BYTES); 110 111 /* 112 * Generate a filesystem id and lookup the filesystem type 113 */ 114 srandomdev(); 115 uuidgen(&Hammer2_VolFSID, 1); 116 uuidgen(&Hammer2_SupCLID, 1); 117 uuidgen(&Hammer2_SupFSID, 1); 118 uuid_from_string(HAMMER2_UUID_STRING, &Hammer2_FSType, &status); 119 /*uuid_name_lookup(&Hammer2_FSType, "DragonFly HAMMER2", &status);*/ 120 if (status != uuid_s_ok) { 121 errx(1, "uuids file does not have the DragonFly " 122 "HAMMER2 filesystem type"); 123 } 124 125 /* 126 * Parse arguments 127 */ 128 while ((ch = getopt(ac, av, "L:b:r:V:")) != -1) { 129 switch(ch) { 130 case 'L': 131 defaultlabels = 0; 132 if (strcasecmp(optarg, "none") == 0) { 133 break; 134 } 135 if (NLabels >= MAXLABELS) { 136 errx(1, "Limit of %d local labels", 137 MAXLABELS - 1); 138 } 139 if (strlen(optarg) == 0) { 140 errx(1, "Volume label '%s' cannot be 0-length", 141 optarg); 142 } 143 if (strlen(optarg) >= HAMMER2_INODE_MAXNAME) { 144 errx(1, "Volume label '%s' is too long " 145 "(%d chars max)", 146 optarg, 147 HAMMER2_INODE_MAXNAME - 1); 148 } 149 Label[NLabels++] = optarg; 150 break; 151 case 'b': 152 BootAreaSize = getsize(optarg, 153 HAMMER2_NEWFS_ALIGN, 154 HAMMER2_BOOT_MAX_BYTES, 2); 155 break; 156 case 'r': 157 AuxAreaSize = getsize(optarg, 158 HAMMER2_NEWFS_ALIGN, 159 HAMMER2_AUX_MAX_BYTES, 2); 160 break; 161 case 'V': 162 Hammer2Version = strtol(optarg, NULL, 0); 163 if (Hammer2Version < HAMMER2_VOL_VERSION_MIN || 164 Hammer2Version >= HAMMER2_VOL_VERSION_WIP) { 165 errx(1, "I don't understand how to format " 166 "HAMMER2 version %d", 167 Hammer2Version); 168 } 169 break; 170 default: 171 usage(); 172 break; 173 } 174 } 175 176 /* 177 * Check Hammer2 version 178 */ 179 if (Hammer2Version < 0) { 180 size_t olen = sizeof(Hammer2Version); 181 Hammer2Version = HAMMER2_VOL_VERSION_DEFAULT; 182 if (sysctlbyname("vfs.hammer2.supported_version", 183 &Hammer2Version, &olen, NULL, 0) == 0) { 184 if (Hammer2Version >= HAMMER2_VOL_VERSION_WIP) { 185 Hammer2Version = HAMMER2_VOL_VERSION_WIP - 1; 186 fprintf(stderr, 187 "newfs_hammer2: WARNING: HAMMER2 VFS " 188 "supports higher version than I " 189 "understand,\n" 190 "using version %d\n", 191 Hammer2Version); 192 } 193 } else { 194 fprintf(stderr, 195 "newfs_hammer2: WARNING: HAMMER2 VFS not " 196 "loaded, cannot get version info.\n" 197 "Using version %d\n", 198 HAMMER2_VOL_VERSION_DEFAULT); 199 } 200 } 201 202 ac -= optind; 203 av += optind; 204 205 if (ac != 1 || av[0][0] == 0) { 206 fprintf(stderr, "Exactly one disk device must be specified\n"); 207 exit(1); 208 } 209 210 /* 211 * Adjust Label[] and NLabels. 212 */ 213 if (defaultlabels) { 214 char c = av[0][strlen(av[0]) - 1]; 215 if (c == 'a') 216 Label[NLabels++] = "BOOT"; 217 else if (c == 'd') 218 Label[NLabels++] = "ROOT"; 219 else 220 Label[NLabels++] = "DATA"; 221 } 222 223 /* 224 * Collect volume information. 225 */ 226 total_space = check_volume(av[0], &fd); 227 228 /* 229 * ~typically 8MB alignment to avoid edge cases for reserved blocks 230 * and so raid stripes (if any) operate efficiently. 231 */ 232 total_space &= ~HAMMER2_VOLUME_ALIGNMASK64; 233 234 /* 235 * Calculate defaults for the boot area size and round to the 236 * volume alignment boundary. 237 * 238 * NOTE: These areas are currently not used for booting but are 239 * reserved for future filesystem expansion. 240 */ 241 if (BootAreaSize == 0) { 242 BootAreaSize = HAMMER2_BOOT_NOM_BYTES; 243 while (BootAreaSize > total_space / 20) 244 BootAreaSize >>= 1; 245 if (BootAreaSize < HAMMER2_BOOT_MIN_BYTES) 246 BootAreaSize = HAMMER2_BOOT_MIN_BYTES; 247 } else if (BootAreaSize < HAMMER2_BOOT_MIN_BYTES) { 248 BootAreaSize = HAMMER2_BOOT_MIN_BYTES; 249 } 250 BootAreaSize = (BootAreaSize + HAMMER2_VOLUME_ALIGNMASK64) & 251 ~HAMMER2_VOLUME_ALIGNMASK64; 252 253 /* 254 * Calculate defaults for the aux area size and round to the 255 * volume alignment boundary. 256 * 257 * NOTE: These areas are currently not used for logging but are 258 * reserved for future filesystem expansion. 259 */ 260 if (AuxAreaSize == 0) { 261 AuxAreaSize = HAMMER2_AUX_NOM_BYTES; 262 while (AuxAreaSize > total_space / 20) 263 AuxAreaSize >>= 1; 264 if (AuxAreaSize < HAMMER2_AUX_MIN_BYTES) 265 AuxAreaSize = HAMMER2_AUX_MIN_BYTES; 266 } else if (AuxAreaSize < HAMMER2_AUX_MIN_BYTES) { 267 AuxAreaSize = HAMMER2_AUX_MIN_BYTES; 268 } 269 AuxAreaSize = (AuxAreaSize + HAMMER2_VOLUME_ALIGNMASK64) & 270 ~HAMMER2_VOLUME_ALIGNMASK64; 271 272 /* 273 * We'll need to stuff this in the volume header soon. 274 */ 275 hammer2_uuid_to_str(&Hammer2_VolFSID, &vol_fsid); 276 hammer2_uuid_to_str(&Hammer2_SupCLID, &sup_clid_name); 277 hammer2_uuid_to_str(&Hammer2_SupFSID, &sup_fsid_name); 278 279 /* 280 * Calculate the amount of reserved space. HAMMER2_ZONE_SEG (4MB) 281 * is reserved at the beginning of every 1GB of storage, rounded up. 282 * Thus a 200MB filesystem will still have a 4MB reserve area. 283 * 284 * We also include the boot and aux areas in the reserve. The 285 * reserve is used to help 'df' calculate the amount of available 286 * space. 287 * 288 * XXX I kinda screwed up and made the reserved area on the LEVEL1 289 * boundary rather than the ZONE boundary. LEVEL1 is on 1GB 290 * boundaries rather than 2GB boundaries. Stick with the LEVEL1 291 * boundary. 292 */ 293 reserved_space = ((total_space + HAMMER2_FREEMAP_LEVEL1_MASK) / 294 HAMMER2_FREEMAP_LEVEL1_SIZE) * HAMMER2_ZONE_SEG64; 295 296 free_space = total_space - reserved_space - BootAreaSize - AuxAreaSize; 297 if ((int64_t)free_space < 0) { 298 fprintf(stderr, "Not enough free space\n"); 299 exit(1); 300 } 301 302 format_hammer2(fd, total_space, free_space); 303 fsync(fd); 304 close(fd); 305 306 printf("---------------------------------------------\n"); 307 printf("version: %d\n", Hammer2Version); 308 printf("total-size: %s (%jd bytes)\n", 309 sizetostr(total_space), 310 (intmax_t)total_space); 311 printf("boot-area-size: %s\n", sizetostr(BootAreaSize)); 312 printf("aux-area-size: %s\n", sizetostr(AuxAreaSize)); 313 printf("topo-reserved: %s\n", sizetostr(reserved_space)); 314 printf("free-space: %s\n", sizetostr(free_space)); 315 printf("vol-fsid: %s\n", vol_fsid); 316 printf("sup-clid: %s\n", sup_clid_name); 317 printf("sup-fsid: %s\n", sup_fsid_name); 318 for (i = 0; i < NLabels; ++i) { 319 printf("PFS \"%s\"\n", Label[i]); 320 hammer2_uuid_to_str(&Hammer2_PfsCLID[i], &pfs_clid_name); 321 hammer2_uuid_to_str(&Hammer2_PfsFSID[i], &pfs_fsid_name); 322 printf(" clid %s\n", pfs_clid_name); 323 printf(" fsid %s\n", pfs_fsid_name); 324 } 325 326 free(vol_fsid); 327 free(sup_clid_name); 328 free(sup_fsid_name); 329 free(pfs_clid_name); 330 free(pfs_fsid_name); 331 332 return(0); 333 } 334 335 static 336 void 337 usage(void) 338 { 339 fprintf(stderr, 340 "usage: newfs_hammer2 [-b bootsize] [-r auxsize] " 341 "[-V version] [-L label ...] special\n" 342 ); 343 exit(1); 344 } 345 346 /* 347 * Convert a string to a 64 bit signed integer with various requirements. 348 */ 349 static int64_t 350 getsize(const char *str, int64_t minval, int64_t maxval, int powerof2) 351 { 352 int64_t val; 353 char *ptr; 354 355 val = strtoll(str, &ptr, 0); 356 switch(*ptr) { 357 case 't': 358 case 'T': 359 val *= 1024; 360 /* fall through */ 361 case 'g': 362 case 'G': 363 val *= 1024; 364 /* fall through */ 365 case 'm': 366 case 'M': 367 val *= 1024; 368 /* fall through */ 369 case 'k': 370 case 'K': 371 val *= 1024; 372 break; 373 default: 374 errx(1, "Unknown suffix in number '%s'", str); 375 /* not reached */ 376 } 377 if (ptr[1]) { 378 errx(1, "Unknown suffix in number '%s'", str); 379 /* not reached */ 380 } 381 if (val < minval) { 382 errx(1, "Value too small: %s, min is %s", 383 str, sizetostr(minval)); 384 /* not reached */ 385 } 386 if (val > maxval) { 387 errx(1, "Value too large: %s, max is %s", 388 str, sizetostr(maxval)); 389 /* not reached */ 390 } 391 if ((powerof2 & 1) && (val ^ (val - 1)) != ((val << 1) - 1)) { 392 errx(1, "Value not power of 2: %s", str); 393 /* not reached */ 394 } 395 if ((powerof2 & 2) && (val & HAMMER2_NEWFS_ALIGNMASK)) { 396 errx(1, "Value not an integral multiple of %dK: %s", 397 HAMMER2_NEWFS_ALIGN / 1024, str); 398 /* not reached */ 399 } 400 return(val); 401 } 402 403 static uint64_t 404 nowtime(void) 405 { 406 struct timeval tv; 407 uint64_t xtime; 408 409 gettimeofday(&tv, NULL); 410 xtime = tv.tv_sec * 1000000LL + tv.tv_usec; 411 return(xtime); 412 } 413 414 /* 415 * Figure out how big the volume is. 416 */ 417 static 418 hammer2_off_t 419 check_volume(const char *path, int *fdp) 420 { 421 struct partinfo pinfo; 422 struct stat st; 423 hammer2_off_t size; 424 425 /* 426 * Get basic information about the volume 427 */ 428 *fdp = open(path, O_RDWR); 429 if (*fdp < 0) 430 err(1, "Unable to open %s R+W", path); 431 if (ioctl(*fdp, DIOCGPART, &pinfo) < 0) { 432 /* 433 * Allow the formatting of regular files as HAMMER2 volumes 434 */ 435 if (fstat(*fdp, &st) < 0) 436 err(1, "Unable to stat %s", path); 437 if (!S_ISREG(st.st_mode)) 438 errx(1, "Unsupported file type for %s", path); 439 size = st.st_size; 440 } else { 441 /* 442 * When formatting a block device as a HAMMER2 volume the 443 * sector size must be compatible. HAMMER2 uses 64K 444 * filesystem buffers but logical buffers for direct I/O 445 * can be as small as HAMMER2_LOGSIZE (16KB). 446 */ 447 if (pinfo.reserved_blocks) { 448 errx(1, "HAMMER2 cannot be placed in a partition " 449 "which overlaps the disklabel or MBR"); 450 } 451 if (pinfo.media_blksize > HAMMER2_PBUFSIZE || 452 HAMMER2_PBUFSIZE % pinfo.media_blksize) { 453 errx(1, "A media sector size of %d is not supported", 454 pinfo.media_blksize); 455 } 456 size = pinfo.media_size; 457 } 458 printf("Volume %-15s size %s\n", path, sizetostr(size)); 459 return (size); 460 } 461 462 /* 463 * Create the volume header, the super-root directory inode, and 464 * the writable snapshot subdirectory (named via the label) which 465 * is to be the initial mount point, or at least the first mount point. 466 * newfs_hammer2 doesn't format the freemap bitmaps for these. 467 * 468 * 0 4MB 469 * [----reserved_area----][boot_area][aux_area] 470 * [[vol_hdr][freemap]...] [sroot][root][root]... 471 * \ ^\ ^ ^ 472 * \--------------------------------------/ \---/-----/---... 473 * 474 * NOTE: The passed total_space is 8MB-aligned to avoid edge cases. 475 */ 476 static 477 void 478 format_hammer2(int fd, hammer2_off_t total_space, hammer2_off_t free_space) 479 { 480 char *buf = malloc(HAMMER2_PBUFSIZE); 481 hammer2_volume_data_t *vol; 482 hammer2_inode_data_t *rawip; 483 hammer2_blockref_t sroot_blockref; 484 hammer2_blockref_t root_blockref[MAXLABELS]; 485 uint64_t now; 486 hammer2_off_t volu_base = 0; 487 hammer2_off_t boot_base = HAMMER2_ZONE_SEG; 488 hammer2_off_t aux_base = boot_base + BootAreaSize; 489 hammer2_off_t alloc_base = aux_base + AuxAreaSize; 490 hammer2_off_t tmp_base; 491 size_t n; 492 int i; 493 494 /* 495 * Clear the entire 4MB reserve for the first 2G zone and 496 * make sure we can write to the last block. 497 */ 498 bzero(buf, HAMMER2_PBUFSIZE); 499 tmp_base = volu_base; 500 for (i = 0; i < HAMMER2_ZONE_BLOCKS_SEG; ++i) { 501 n = pwrite(fd, buf, HAMMER2_PBUFSIZE, tmp_base); 502 if (n != HAMMER2_PBUFSIZE) { 503 perror("write"); 504 exit(1); 505 } 506 tmp_base += HAMMER2_PBUFSIZE; 507 } 508 509 n = pwrite(fd, buf, HAMMER2_PBUFSIZE, 510 volu_base + total_space - HAMMER2_PBUFSIZE); 511 if (n != HAMMER2_PBUFSIZE) { 512 perror("write (at-end-of-volume)"); 513 exit(1); 514 } 515 516 /* 517 * Make sure alloc_base won't cross the reserved area at the 518 * beginning of each 1GB. 519 * 520 * Reserve space for the super-root inode and the root inode. 521 * Make sure they are in the same 64K block to simplify our code. 522 */ 523 assert((alloc_base & HAMMER2_PBUFMASK) == 0); 524 assert(alloc_base < HAMMER2_FREEMAP_LEVEL1_SIZE); 525 526 /* 527 * Clear the boot/aux area. 528 */ 529 for (tmp_base = boot_base; tmp_base < alloc_base; 530 tmp_base += HAMMER2_PBUFSIZE) { 531 n = pwrite(fd, buf, HAMMER2_PBUFSIZE, tmp_base); 532 if (n != HAMMER2_PBUFSIZE) { 533 perror("write (boot/aux)"); 534 exit(1); 535 } 536 } 537 538 now = nowtime(); 539 alloc_base &= ~HAMMER2_PBUFMASK64; 540 alloc_direct(&alloc_base, &sroot_blockref, HAMMER2_INODE_BYTES); 541 542 for (i = 0; i < NLabels; ++i) { 543 uuidgen(&Hammer2_PfsCLID[i], 1); 544 uuidgen(&Hammer2_PfsFSID[i], 1); 545 546 alloc_direct(&alloc_base, &root_blockref[i], 547 HAMMER2_INODE_BYTES); 548 assert(((sroot_blockref.data_off ^ root_blockref[i].data_off) & 549 ~HAMMER2_PBUFMASK64) == 0); 550 551 /* 552 * Format the root directory inode, which is left empty. 553 */ 554 rawip = (void *)(buf + (HAMMER2_OFF_MASK_LO & 555 root_blockref[i].data_off)); 556 rawip->meta.version = HAMMER2_INODE_VERSION_ONE; 557 rawip->meta.ctime = now; 558 rawip->meta.mtime = now; 559 /* rawip->atime = now; NOT IMPL MUST BE ZERO */ 560 rawip->meta.btime = now; 561 rawip->meta.type = HAMMER2_OBJTYPE_DIRECTORY; 562 rawip->meta.mode = 0755; 563 rawip->meta.inum = 1; /* root inode, inumber 1 */ 564 rawip->meta.nlinks = 1; /* directory link count compat */ 565 566 rawip->meta.name_len = strlen(Label[i]); 567 bcopy(Label[i], rawip->filename, rawip->meta.name_len); 568 rawip->meta.name_key = 569 dirhash(rawip->filename, rawip->meta.name_len); 570 571 /* 572 * Compression mode and supported copyids. 573 * 574 * Do not allow compression when creating any "BOOT" label 575 * (pfs-create also does the same if the pfs is named "BOOT") 576 */ 577 if (strcasecmp(Label[i], "BOOT") == 0) { 578 rawip->meta.comp_algo = HAMMER2_ENC_ALGO( 579 HAMMER2_COMP_AUTOZERO); 580 rawip->meta.check_algo = HAMMER2_ENC_ALGO( 581 HAMMER2_CHECK_XXHASH64); 582 } else { 583 rawip->meta.comp_algo = HAMMER2_ENC_ALGO( 584 HAMMER2_COMP_NEWFS_DEFAULT); 585 rawip->meta.check_algo = HAMMER2_ENC_ALGO( 586 HAMMER2_CHECK_XXHASH64); 587 } 588 589 /* 590 * NOTE: We leave nmasters set to 0, which means that we 591 * don't know how many masters there are. The quorum 592 * calculation will effectively be 1 ( 0 / 2 + 1 ). 593 */ 594 rawip->meta.pfs_clid = Hammer2_PfsCLID[i]; 595 rawip->meta.pfs_fsid = Hammer2_PfsFSID[i]; 596 rawip->meta.pfs_type = HAMMER2_PFSTYPE_MASTER; 597 rawip->meta.op_flags |= HAMMER2_OPFLAG_PFSROOT; 598 599 /* first allocatable inode number */ 600 rawip->meta.pfs_inum = 16; 601 602 /* rawip->u.blockset is left empty */ 603 604 /* 605 * The root blockref will be stored in the super-root inode as 606 * one of the ~4 PFS root directories. The copyid here is the 607 * actual copyid of the storage ref. 608 * 609 * The key field for a PFS root directory's blockref is 610 * essentially the name key for the entry. 611 */ 612 root_blockref[i].key = rawip->meta.name_key; 613 root_blockref[i].copyid = HAMMER2_COPYID_LOCAL; 614 root_blockref[i].keybits = 0; 615 root_blockref[i].check.xxhash64.value = 616 XXH64(rawip, sizeof(*rawip), XXH_HAMMER2_SEED); 617 root_blockref[i].type = HAMMER2_BREF_TYPE_INODE; 618 root_blockref[i].methods = 619 HAMMER2_ENC_CHECK(HAMMER2_CHECK_XXHASH64) | 620 HAMMER2_ENC_COMP(HAMMER2_COMP_NONE); 621 root_blockref[i].mirror_tid = 16; 622 root_blockref[i].flags = HAMMER2_BREF_FLAG_PFSROOT; 623 } 624 625 /* 626 * Format the super-root directory inode, giving it ~4 PFS root 627 * directories (root_blockref). 628 * 629 * The superroot contains ~4 directories pointing at the PFS root 630 * inodes (named via the label). Inodes contain one blockset which 631 * is fully associative so we can put the entry anywhere without 632 * having to worry about the hash. Use index 0. 633 */ 634 rawip = (void *)(buf + (HAMMER2_OFF_MASK_LO & sroot_blockref.data_off)); 635 rawip->meta.version = HAMMER2_INODE_VERSION_ONE; 636 rawip->meta.ctime = now; 637 rawip->meta.mtime = now; 638 /* rawip->meta.atime = now; NOT IMPL MUST BE ZERO */ 639 rawip->meta.btime = now; 640 rawip->meta.type = HAMMER2_OBJTYPE_DIRECTORY; 641 rawip->meta.mode = 0700; /* super-root - root only */ 642 rawip->meta.inum = 0; /* super root inode, inumber 0 */ 643 rawip->meta.nlinks = 2; /* directory link count compat */ 644 645 rawip->meta.name_len = 0; /* super-root is unnamed */ 646 rawip->meta.name_key = 0; 647 648 rawip->meta.comp_algo = HAMMER2_ENC_ALGO(HAMMER2_COMP_AUTOZERO); 649 rawip->meta.check_algo = HAMMER2_ENC_ALGO(HAMMER2_CHECK_XXHASH64); 650 651 /* 652 * The super-root is flagged as a PFS and typically given its own 653 * random FSID, making it possible to mirror an entire HAMMER2 disk 654 * snapshots and all if desired. PFS ids are used to match up 655 * mirror sources and targets and cluster copy sources and targets. 656 * 657 * (XXX whole-disk logical mirroring is not really supported in 658 * the first attempt because each PFS is in its own modify/mirror 659 * transaction id domain, so normal mechanics cannot cross a PFS 660 * boundary). 661 */ 662 rawip->meta.pfs_clid = Hammer2_SupCLID; 663 rawip->meta.pfs_fsid = Hammer2_SupFSID; 664 rawip->meta.pfs_type = HAMMER2_PFSTYPE_SUPROOT; 665 snprintf((char*)rawip->filename, sizeof(rawip->filename), "SUPROOT"); 666 rawip->meta.name_key = 0; 667 rawip->meta.name_len = strlen((char*)rawip->filename); 668 669 /* The super-root has an inode number of 0 */ 670 rawip->meta.pfs_inum = 0; 671 672 /* 673 * Currently newfs_hammer2 just throws the PFS inodes into the 674 * top-level block table at the volume root and doesn't try to 675 * create an indirect block, so we are limited to ~4 at filesystem 676 * creation time. More can be added after mounting. 677 */ 678 qsort(root_blockref, NLabels, sizeof(root_blockref[0]), blkrefary_cmp); 679 for (i = 0; i < NLabels; ++i) 680 rawip->u.blockset.blockref[i] = root_blockref[i]; 681 682 /* 683 * The sroot blockref will be stored in the volume header. 684 */ 685 sroot_blockref.copyid = HAMMER2_COPYID_LOCAL; 686 sroot_blockref.keybits = 0; 687 sroot_blockref.check.xxhash64.value = 688 XXH64(rawip, sizeof(*rawip), XXH_HAMMER2_SEED); 689 sroot_blockref.type = HAMMER2_BREF_TYPE_INODE; 690 sroot_blockref.methods = HAMMER2_ENC_CHECK(HAMMER2_CHECK_XXHASH64) | 691 HAMMER2_ENC_COMP(HAMMER2_COMP_AUTOZERO); 692 sroot_blockref.mirror_tid = 16; 693 rawip = NULL; 694 695 /* 696 * Write out the 64K HAMMER2 block containing the root and sroot. 697 */ 698 assert((sroot_blockref.data_off & ~HAMMER2_PBUFMASK64) == 699 ((alloc_base - 1) & ~HAMMER2_PBUFMASK64)); 700 n = pwrite(fd, buf, HAMMER2_PBUFSIZE, 701 sroot_blockref.data_off & ~HAMMER2_PBUFMASK64); 702 if (n != HAMMER2_PBUFSIZE) { 703 perror("write"); 704 exit(1); 705 } 706 707 /* 708 * Format the volume header. 709 * 710 * The volume header points to sroot_blockref. Also be absolutely 711 * sure that allocator_beg is set. 712 */ 713 assert(HAMMER2_VOLUME_BYTES <= HAMMER2_PBUFSIZE); 714 bzero(buf, HAMMER2_PBUFSIZE); 715 vol = (void *)buf; 716 717 vol->magic = HAMMER2_VOLUME_ID_HBO; 718 vol->boot_beg = boot_base; 719 vol->boot_end = boot_base + BootAreaSize; 720 vol->aux_beg = aux_base; 721 vol->aux_end = aux_base + AuxAreaSize; 722 vol->volu_size = total_space; 723 vol->version = Hammer2Version; 724 vol->flags = 0; 725 726 vol->fsid = Hammer2_VolFSID; 727 vol->fstype = Hammer2_FSType; 728 729 vol->peer_type = DMSG_PEER_HAMMER2; /* LNK_CONN identification */ 730 731 vol->allocator_size = free_space; 732 vol->allocator_free = free_space; 733 vol->allocator_beg = alloc_base; 734 735 vol->sroot_blockset.blockref[0] = sroot_blockref; 736 vol->mirror_tid = 16; /* all blockref mirror TIDs set to 16 */ 737 vol->freemap_tid = 16; /* all blockref mirror TIDs set to 16 */ 738 vol->icrc_sects[HAMMER2_VOL_ICRC_SECT1] = 739 hammer2_icrc32((char *)vol + HAMMER2_VOLUME_ICRC1_OFF, 740 HAMMER2_VOLUME_ICRC1_SIZE); 741 742 /* 743 * Set ICRC_SECT0 after all remaining elements of sect0 have been 744 * populated in the volume header. Note hat ICRC_SECT* (except for 745 * SECT0) are part of sect0. 746 */ 747 vol->icrc_sects[HAMMER2_VOL_ICRC_SECT0] = 748 hammer2_icrc32((char *)vol + HAMMER2_VOLUME_ICRC0_OFF, 749 HAMMER2_VOLUME_ICRC0_SIZE); 750 vol->icrc_volheader = 751 hammer2_icrc32((char *)vol + HAMMER2_VOLUME_ICRCVH_OFF, 752 HAMMER2_VOLUME_ICRCVH_SIZE); 753 754 /* 755 * Write the volume header and all alternates. 756 */ 757 for (i = 0; i < HAMMER2_NUM_VOLHDRS; ++i) { 758 if (i * HAMMER2_ZONE_BYTES64 >= total_space) 759 break; 760 n = pwrite(fd, buf, HAMMER2_PBUFSIZE, 761 volu_base + i * HAMMER2_ZONE_BYTES64); 762 if (n != HAMMER2_PBUFSIZE) { 763 perror("write"); 764 exit(1); 765 } 766 } 767 768 /* 769 * Cleanup 770 */ 771 free(buf); 772 } 773 774 static void 775 alloc_direct(hammer2_off_t *basep, hammer2_blockref_t *bref, size_t bytes) 776 { 777 int radix; 778 779 radix = 0; 780 assert(bytes); 781 while ((bytes & 1) == 0) { 782 bytes >>= 1; 783 ++radix; 784 } 785 assert(bytes == 1); 786 if (radix < HAMMER2_RADIX_MIN) 787 radix = HAMMER2_RADIX_MIN; 788 789 bzero(bref, sizeof(*bref)); 790 bref->data_off = *basep | radix; 791 bref->vradix = radix; 792 793 *basep += 1U << radix; 794 } 795 796 static int 797 blkrefary_cmp(const void *b1, const void *b2) 798 { 799 const hammer2_blockref_t *bref1 = b1; 800 const hammer2_blockref_t *bref2 = b2; 801 802 if (bref1->key < bref2->key) 803 return(-1); 804 if (bref1->key > bref2->key) 805 return(1); 806 return 0; 807 } 808