2 * Copyright (c) 2011-2014 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@dragonflybsd.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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
35 #include <sys/types.h>
36 #include <sys/diskslice.h>
37 #include <sys/diskmbr.h>
40 #include <sys/sysctl.h>
41 #include <vfs/hammer2/hammer2_disk.h>
57 #define hammer2_icrc32(buf, size) iscsi_crc32((buf), (size))
58 #define hammer2_icrc32c(buf, size, crc) iscsi_crc32_ext((buf), (size), (crc))
59 uint32_t iscsi_crc32(const void *buf, size_t size);
60 uint32_t iscsi_crc32_ext(const void *buf, size_t size, uint32_t ocrc);
62 static hammer2_off_t check_volume(const char *path, int *fdp);
63 static int64_t getsize(const char *str, int64_t minval, int64_t maxval, int pw);
64 static const char *sizetostr(hammer2_off_t size);
65 static uint64_t nowtime(void);
66 static int blkrefary_cmp(const void *b1, const void *b2);
67 static void usage(void);
69 static void format_hammer2(int fd, hammer2_off_t total_space,
70 hammer2_off_t free_space);
71 static void alloc_direct(hammer2_off_t *basep, hammer2_blockref_t *bref,
73 static hammer2_key_t dirhash(const unsigned char *name, size_t len);
75 static int Hammer2Version = -1;
76 static int ForceOpt = 0;
77 static uuid_t Hammer2_FSType; /* static filesystem type id for HAMMER2 */
78 static uuid_t Hammer2_VolFSID; /* unique filesystem id in volu header */
79 static uuid_t Hammer2_SupCLID; /* PFS cluster id in super-root inode */
80 static uuid_t Hammer2_SupFSID; /* PFS unique id in super-root inode */
81 static uuid_t Hammer2_PfsCLID[MAXLABELS];
82 static uuid_t Hammer2_PfsFSID[MAXLABELS];
83 static const char *Label[MAXLABELS];
84 static hammer2_off_t BootAreaSize;
85 static hammer2_off_t AuxAreaSize;
88 #define GIG ((hammer2_off_t)1024*1024*1024)
91 main(int ac, char **av)
94 hammer2_off_t total_space;
95 hammer2_off_t free_space;
96 hammer2_off_t reserved_space;
107 Label[NLabels++] = "LOCAL";
110 * Sanity check basic filesystem structures. No cookies for us
113 assert(sizeof(hammer2_volume_data_t) == HAMMER2_VOLUME_BYTES);
114 assert(sizeof(hammer2_inode_data_t) == HAMMER2_INODE_BYTES);
115 assert(sizeof(hammer2_blockref_t) == HAMMER2_BLOCKREF_BYTES);
118 * Generate a filesystem id and lookup the filesystem type
121 uuidgen(&Hammer2_VolFSID, 1);
122 uuidgen(&Hammer2_SupCLID, 1);
123 uuidgen(&Hammer2_SupFSID, 1);
124 uuid_from_string(HAMMER2_UUID_STRING, &Hammer2_FSType, &status);
125 /*uuid_name_lookup(&Hammer2_FSType, "DragonFly HAMMER2", &status);*/
126 if (status != uuid_s_ok) {
127 errx(1, "uuids file does not have the DragonFly "
128 "HAMMER2 filesystem type");
134 while ((ch = getopt(ac, av, "fL:b:m:r:V:")) != -1) {
140 if (strcasecmp(optarg, "none") == 0) {
144 if (NLabels >= MAXLABELS) {
145 errx(1, "Limit of 3 local labels");
147 Label[NLabels++] = optarg;
148 if (strlen(Label[NLabels-1]) > HAMMER2_INODE_MAXNAME) {
149 errx(1, "Root directory label too long "
154 BootAreaSize = getsize(optarg,
156 HAMMER2_BOOT_MAX_BYTES, 2);
159 AuxAreaSize = getsize(optarg,
161 HAMMER2_REDO_MAX_BYTES, 2);
164 Hammer2Version = strtol(optarg, NULL, 0);
165 if (Hammer2Version < HAMMER2_VOL_VERSION_MIN ||
166 Hammer2Version >= HAMMER2_VOL_VERSION_WIP) {
168 "I don't understand how to format "
169 "HAMMER2 version %d\n",
180 * Adjust Label[] and NLabels
184 } else if (NLabels == 1) {
185 Label[NLabels++] = "BOOT";
186 Label[NLabels++] = "ROOT";
190 * Check Hammer2 version
192 if (Hammer2Version < 0) {
193 size_t olen = sizeof(Hammer2Version);
194 Hammer2Version = HAMMER2_VOL_VERSION_DEFAULT;
195 if (sysctlbyname("vfs.hammer2.supported_version",
196 &Hammer2Version, &olen, NULL, 0) == 0) {
197 if (Hammer2Version >= HAMMER2_VOL_VERSION_WIP) {
198 Hammer2Version = HAMMER2_VOL_VERSION_WIP - 1;
200 "newfs_hammer: WARNING: HAMMER2 VFS "
201 "supports higher version than I "
203 "using version %d\n",
208 "newfs_hammer: WARNING: HAMMER2 VFS not "
209 "loaded, cannot get version info.\n"
210 "Using version %d\n",
211 HAMMER2_VOL_VERSION_DEFAULT);
216 * Collect volume information.
222 fprintf(stderr, "Exactly one disk device must be specified\n");
225 total_space = check_volume(av[0], &fd);
228 * ~typically 8MB alignment to avoid edge cases for reserved blocks
229 * and so raid stripes (if any) operate efficiently.
231 total_space &= ~HAMMER2_VOLUME_ALIGNMASK64;
234 * Calculate defaults for the boot area size and round to the
235 * volume alignment boundary.
237 if (BootAreaSize == 0) {
238 BootAreaSize = HAMMER2_BOOT_NOM_BYTES;
239 while (BootAreaSize > total_space / 20)
241 if (BootAreaSize < HAMMER2_BOOT_MIN_BYTES)
242 BootAreaSize = HAMMER2_BOOT_MIN_BYTES;
243 } else if (BootAreaSize < HAMMER2_BOOT_MIN_BYTES) {
244 BootAreaSize = HAMMER2_BOOT_MIN_BYTES;
246 BootAreaSize = (BootAreaSize + HAMMER2_VOLUME_ALIGNMASK64) &
247 ~HAMMER2_VOLUME_ALIGNMASK64;
250 * Calculate defaults for the redo area size and round to the
251 * volume alignment boundary.
253 if (AuxAreaSize == 0) {
254 AuxAreaSize = HAMMER2_REDO_NOM_BYTES;
255 while (AuxAreaSize > total_space / 20)
257 if (AuxAreaSize < HAMMER2_REDO_MIN_BYTES)
258 AuxAreaSize = HAMMER2_REDO_MIN_BYTES;
259 } else if (AuxAreaSize < HAMMER2_REDO_MIN_BYTES) {
260 AuxAreaSize = HAMMER2_REDO_MIN_BYTES;
262 AuxAreaSize = (AuxAreaSize + HAMMER2_VOLUME_ALIGNMASK64) &
263 ~HAMMER2_VOLUME_ALIGNMASK64;
266 * We'll need to stuff this in the volume header soon.
268 uuid_to_string(&Hammer2_VolFSID, &vol_fsid, &status);
269 uuid_to_string(&Hammer2_SupCLID, &sup_clid_name, &status);
270 uuid_to_string(&Hammer2_SupFSID, &sup_fsid_name, &status);
273 * Calculate the amount of reserved space. HAMMER2_ZONE_SEG (4MB)
274 * is reserved at the beginning of every 2GB of storage, rounded up.
275 * Thus a 200MB filesystem will still have a 4MB reserve area.
277 * We also include the boot and redo areas in the reserve. The
278 * reserve is used to help 'df' calculate the amount of available
281 reserved_space = ((total_space + HAMMER2_ZONE_MASK64) /
282 HAMMER2_ZONE_BYTES64) * HAMMER2_ZONE_SEG64;
284 free_space = total_space - reserved_space -
285 BootAreaSize - AuxAreaSize;
287 format_hammer2(fd, total_space, free_space);
291 printf("---------------------------------------------\n");
292 printf("version: %d\n", Hammer2Version);
293 printf("total-size: %s (%jd bytes)\n",
294 sizetostr(total_space),
295 (intmax_t)total_space);
296 printf("boot-area-size: %s\n", sizetostr(BootAreaSize));
297 printf("aux-area-size: %s\n", sizetostr(AuxAreaSize));
298 printf("topo-reserved: %s\n", sizetostr(reserved_space));
299 printf("free-space: %s\n", sizetostr(free_space));
300 printf("vol-fsid: %s\n", vol_fsid);
301 printf("sup-clid: %s\n", sup_clid_name);
302 printf("sup-fsid: %s\n", sup_fsid_name);
303 for (i = 0; i < NLabels; ++i) {
304 printf("PFS \"%s\"\n", Label[i]);
305 uuid_to_string(&Hammer2_PfsCLID[i], &pfs_clid_name, &status);
306 uuid_to_string(&Hammer2_PfsFSID[i], &pfs_fsid_name, &status);
307 printf(" clid %s\n", pfs_clid_name);
308 printf(" fsid %s\n", pfs_fsid_name);
320 "usage: newfs_hammer -L label [-f] [-b bootsize] "
321 "[-r redosize] [-V version] special ...\n"
327 * Convert the size in bytes to a human readable string.
331 sizetostr(hammer2_off_t size)
335 if (size < 1024 / 2) {
336 snprintf(buf, sizeof(buf), "%6.2f", (double)size);
337 } else if (size < 1024 * 1024 / 2) {
338 snprintf(buf, sizeof(buf), "%6.2fKB",
339 (double)size / 1024);
340 } else if (size < 1024 * 1024 * 1024LL / 2) {
341 snprintf(buf, sizeof(buf), "%6.2fMB",
342 (double)size / (1024 * 1024));
343 } else if (size < 1024 * 1024 * 1024LL * 1024LL / 2) {
344 snprintf(buf, sizeof(buf), "%6.2fGB",
345 (double)size / (1024 * 1024 * 1024LL));
347 snprintf(buf, sizeof(buf), "%6.2fTB",
348 (double)size / (1024 * 1024 * 1024LL * 1024LL));
354 * Convert a string to a 64 bit signed integer with various requirements.
357 getsize(const char *str, int64_t minval, int64_t maxval, int powerof2)
362 val = strtoll(str, &ptr, 0);
381 errx(1, "Unknown suffix in number '%s'\n", str);
385 errx(1, "Unknown suffix in number '%s'\n", str);
389 errx(1, "Value too small: %s, min is %s\n",
390 str, sizetostr(minval));
394 errx(1, "Value too large: %s, max is %s\n",
395 str, sizetostr(maxval));
398 if ((powerof2 & 1) && (val ^ (val - 1)) != ((val << 1) - 1)) {
399 errx(1, "Value not power of 2: %s\n", str);
402 if ((powerof2 & 2) && (val & HAMMER2_NEWFS_ALIGNMASK)) {
403 errx(1, "Value not an integral multiple of %dK: %s",
404 HAMMER2_NEWFS_ALIGN / 1024, str);
416 gettimeofday(&tv, NULL);
417 xtime = tv.tv_sec * 1000000LL + tv.tv_usec;
422 * Figure out how big the volume is.
426 check_volume(const char *path, int *fdp)
428 struct partinfo pinfo;
433 * Get basic information about the volume
435 *fdp = open(path, O_RDWR);
437 err(1, "Unable to open %s R+W", path);
438 if (ioctl(*fdp, DIOCGPART, &pinfo) < 0) {
440 * Allow the formatting of regular files as HAMMER2 volumes
442 if (fstat(*fdp, &st) < 0)
443 err(1, "Unable to stat %s", path);
447 * When formatting a block device as a HAMMER2 volume the
448 * sector size must be compatible. HAMMER2 uses 64K
449 * filesystem buffers but logical buffers for direct I/O
450 * can be as small as HAMMER2_LOGSIZE (16KB).
452 if (pinfo.reserved_blocks) {
453 errx(1, "HAMMER cannot be placed in a partition "
454 "which overlaps the disklabel or MBR");
456 if (pinfo.media_blksize > HAMMER2_PBUFSIZE ||
457 HAMMER2_PBUFSIZE % pinfo.media_blksize) {
458 errx(1, "A media sector size of %d is not supported",
459 pinfo.media_blksize);
461 size = pinfo.media_size;
463 printf("Volume %-15s size %s\n", path, sizetostr(size));
468 * Create the volume header, the super-root directory inode, and
469 * the writable snapshot subdirectory (named via the label) which
470 * is to be the initial mount point, or at least the first mount point.
472 * [----reserved_area----][boot_area][aux_area]
473 * [[vol_hdr]... ] [sroot][root]
475 * The sroot and root inodes eat 512 bytes each. newfs labels can only be
476 * 64 bytes so the root (snapshot) inode does not need to extend past 512
477 * bytes. We use the correct hash slot correct but note that because
478 * directory hashes are chained 16x, any slot in the inode will work.
480 * Also format the allocation map.
482 * NOTE: The passed total_space is 8MB-aligned to avoid edge cases.
486 format_hammer2(int fd, hammer2_off_t total_space, hammer2_off_t free_space)
488 char *buf = malloc(HAMMER2_PBUFSIZE);
489 hammer2_volume_data_t *vol;
490 hammer2_inode_data_t *rawip;
491 hammer2_blockref_t sroot_blockref;
492 hammer2_blockref_t root_blockref[MAXLABELS]; /* Max 4 labels */
494 hammer2_off_t volu_base = 0;
495 hammer2_off_t boot_base = HAMMER2_ZONE_SEG;
496 hammer2_off_t aux_base = boot_base + BootAreaSize;
497 hammer2_off_t alloc_base = aux_base + AuxAreaSize;
498 hammer2_off_t tmp_base;
503 * Clear the entire reserve for the first 2G segment and
504 * make sure we can write to the last block.
506 bzero(buf, HAMMER2_PBUFSIZE);
507 tmp_base = volu_base;
508 for (i = 0; i < HAMMER2_ZONE_BLOCKS_SEG; ++i) {
509 n = pwrite(fd, buf, HAMMER2_PBUFSIZE, tmp_base);
510 if (n != HAMMER2_PBUFSIZE) {
514 tmp_base += HAMMER2_PBUFSIZE;
517 n = pwrite(fd, buf, HAMMER2_PBUFSIZE,
518 volu_base + total_space - HAMMER2_PBUFSIZE);
519 if (n != HAMMER2_PBUFSIZE) {
520 perror("write (at-end-of-volume)");
525 * Make sure alloc_base won't cross the reserved area at the
526 * beginning of each 2GB zone.
528 * Reserve space for the super-root inode and the root inode.
529 * Make sure they are in the same 64K block to simplify our code.
531 assert((alloc_base & HAMMER2_PBUFMASK) == 0);
532 assert(alloc_base < HAMMER2_ZONE_BYTES64 - HAMMER2_ZONE_SEG);
534 bzero(buf, HAMMER2_PBUFSIZE);
536 alloc_base &= ~HAMMER2_PBUFMASK64;
537 alloc_direct(&alloc_base, &sroot_blockref, HAMMER2_INODE_BYTES);
539 for (i = 0; i < NLabels; ++i) {
540 uuidgen(&Hammer2_PfsCLID[i], 1);
541 uuidgen(&Hammer2_PfsFSID[i], 1);
543 alloc_direct(&alloc_base, &root_blockref[i],
544 HAMMER2_INODE_BYTES);
545 assert(((sroot_blockref.data_off ^ root_blockref[i].data_off) &
546 HAMMER2_OFF_MASK_HI) == 0);
549 * Format the root directory inode, which is left empty.
551 rawip = (void *)(buf + (HAMMER2_OFF_MASK_LO &
552 root_blockref[i].data_off));
553 rawip->version = HAMMER2_INODE_VERSION_ONE;
556 /* rawip->atime = now; NOT IMPL MUST BE ZERO */
558 rawip->type = HAMMER2_OBJTYPE_DIRECTORY;
560 rawip->inum = 1; /* root inode, inumber 1 */
561 rawip->nlinks = 1; /* directory link count compat */
563 rawip->name_len = strlen(Label[i]);
564 bcopy(Label[i], rawip->filename, rawip->name_len);
565 rawip->name_key = dirhash(rawip->filename, rawip->name_len);
568 * Compression mode and supported copyids.
570 * Do not allow compression when creating any "BOOT" label
571 * (pfs-create also does the same if the pfs is named "BOOT")
573 if (strcasecmp(Label[i], "BOOT") == 0) {
574 rawip->comp_algo = HAMMER2_ENC_ALGO(
575 HAMMER2_COMP_AUTOZERO);
576 rawip->check_algo = HAMMER2_ENC_ALGO(
577 HAMMER2_CHECK_ISCSI32);
579 rawip->comp_algo = HAMMER2_ENC_ALGO(
580 HAMMER2_COMP_NEWFS_DEFAULT);
581 rawip->check_algo = HAMMER2_ENC_ALGO(
582 HAMMER2_CHECK_ISCSI32);
586 * NOTE: We leave nmasters set to 0, which means that we
587 * don't know how many masters there are. The quorum
588 * calculation will effectively be 1 ( 0 / 2 + 1 ).
590 rawip->pfs_clid = Hammer2_PfsCLID[i];
591 rawip->pfs_fsid = Hammer2_PfsFSID[i];
592 rawip->pfs_type = HAMMER2_PFSTYPE_MASTER;
593 rawip->op_flags |= HAMMER2_OPFLAG_PFSROOT;
594 rawip->pfs_inum = 16; /* first allocatable inode number */
596 /* rawip->u.blockset is left empty */
599 * The root blockref will be stored in the super-root inode as
600 * the only directory entry. The copyid here is the actual
601 * copyid of the storage ref.
603 * The key field for a directory entry's blockref is
604 * essentially the name key for the entry.
606 root_blockref[i].key = rawip->name_key;
607 root_blockref[i].copyid = HAMMER2_COPYID_LOCAL;
608 root_blockref[i].keybits = 0;
609 root_blockref[i].check.iscsi32.value =
610 hammer2_icrc32(rawip, sizeof(*rawip));
611 root_blockref[i].type = HAMMER2_BREF_TYPE_INODE;
612 root_blockref[i].methods =
613 HAMMER2_ENC_CHECK(HAMMER2_CHECK_ISCSI32) |
614 HAMMER2_ENC_COMP(HAMMER2_COMP_NONE);
615 root_blockref[i].mirror_tid = 16;
616 root_blockref[i].flags = HAMMER2_BREF_FLAG_PFSROOT;
620 * Format the super-root directory inode, giving it one directory
621 * entry (root_blockref) and fixup the icrc method.
623 * The superroot contains one directory entry pointing at the root
624 * inode (named via the label). Inodes contain one blockset which
625 * is fully associative so we can put the entry anywhere without
626 * having to worry about the hash. Use index 0.
628 rawip = (void *)(buf + (HAMMER2_OFF_MASK_LO & sroot_blockref.data_off));
629 rawip->version = HAMMER2_INODE_VERSION_ONE;
632 /* rawip->atime = now; NOT IMPL MUST BE ZERO */
634 rawip->type = HAMMER2_OBJTYPE_DIRECTORY;
635 rawip->mode = 0700; /* super-root - root only */
636 rawip->inum = 0; /* super root inode, inumber 0 */
637 rawip->nlinks = 2; /* directory link count compat */
639 rawip->name_len = 0; /* super-root is unnamed */
642 rawip->comp_algo = HAMMER2_ENC_ALGO(HAMMER2_COMP_AUTOZERO);
643 rawip->check_algo = HAMMER2_ENC_ALGO(HAMMER2_CHECK_ISCSI32);
646 * The super-root is flagged as a PFS and typically given its own
647 * random FSID, making it possible to mirror an entire HAMMER2 disk
648 * snapshots and all if desired. PFS ids are used to match up
649 * mirror sources and targets and cluster copy sources and targets.
651 * (XXX whole-disk logical mirroring is not really supported in
652 * the first attempt because each PFS is in its own modify/mirror
653 * transaction id domain, so normal mechanics cannot cross a PFS
656 rawip->pfs_clid = Hammer2_SupCLID;
657 rawip->pfs_fsid = Hammer2_SupFSID;
658 rawip->pfs_type = HAMMER2_PFSTYPE_SUPROOT;
659 rawip->pfs_inum = 16; /* first allocatable inode number */
662 * The super-root has a directory entry pointing to each local
663 * PFS. To avoid having to deal with indirect blocks we can't load
664 * up more than 8 entries, but NLabels is restricted to 4 entries
665 * to leave room for possible future mandatory PFSs.
667 qsort(root_blockref, NLabels, sizeof(root_blockref[0]), blkrefary_cmp);
668 for (i = 0; i < NLabels; ++i)
669 rawip->u.blockset.blockref[i] = root_blockref[i];
672 * The sroot blockref will be stored in the volume header.
674 sroot_blockref.copyid = HAMMER2_COPYID_LOCAL;
675 sroot_blockref.keybits = 0;
676 sroot_blockref.check.iscsi32.value =
677 hammer2_icrc32(rawip, sizeof(*rawip));
678 sroot_blockref.type = HAMMER2_BREF_TYPE_INODE;
679 sroot_blockref.methods = HAMMER2_ENC_CHECK(HAMMER2_CHECK_ISCSI32) |
680 HAMMER2_ENC_COMP(HAMMER2_COMP_AUTOZERO);
681 sroot_blockref.mirror_tid = 16;
685 * Write out the 64K HAMMER2 block containing the root and sroot.
687 n = pwrite(fd, buf, HAMMER2_PBUFSIZE,
688 sroot_blockref.data_off & HAMMER2_OFF_MASK_HI);
689 if (n != HAMMER2_PBUFSIZE) {
695 * Format the volume header.
697 * The volume header points to sroot_blockref. Also be absolutely
698 * sure that allocator_beg is set.
700 bzero(buf, HAMMER2_PBUFSIZE);
703 vol->magic = HAMMER2_VOLUME_ID_HBO;
704 vol->boot_beg = boot_base;
705 vol->boot_end = boot_base + BootAreaSize;
706 vol->aux_beg = aux_base;
707 vol->aux_end = aux_base + AuxAreaSize;
708 vol->volu_size = total_space;
709 vol->version = Hammer2Version;
712 vol->fsid = Hammer2_VolFSID;
713 vol->fstype = Hammer2_FSType;
715 vol->peer_type = DMSG_PEER_HAMMER2; /* LNK_CONN identification */
717 vol->allocator_size = free_space;
718 vol->allocator_free = free_space;
719 vol->allocator_beg = alloc_base;
721 vol->sroot_blockset.blockref[0] = sroot_blockref;
722 vol->mirror_tid = 16; /* all blockref mirror TIDs set to 16 */
723 vol->freemap_tid = 16; /* all blockref mirror TIDs set to 16 */
724 vol->icrc_sects[HAMMER2_VOL_ICRC_SECT1] =
725 hammer2_icrc32((char *)vol + HAMMER2_VOLUME_ICRC1_OFF,
726 HAMMER2_VOLUME_ICRC1_SIZE);
729 * Set ICRC_SECT0 after all remaining elements of sect0 have been
730 * populated in the volume header. Note hat ICRC_SECT* (except for
731 * SECT0) are part of sect0.
733 vol->icrc_sects[HAMMER2_VOL_ICRC_SECT0] =
734 hammer2_icrc32((char *)vol + HAMMER2_VOLUME_ICRC0_OFF,
735 HAMMER2_VOLUME_ICRC0_SIZE);
736 vol->icrc_volheader =
737 hammer2_icrc32((char *)vol + HAMMER2_VOLUME_ICRCVH_OFF,
738 HAMMER2_VOLUME_ICRCVH_SIZE);
741 * Write the volume header and all alternates.
743 for (i = 0; i < HAMMER2_NUM_VOLHDRS; ++i) {
744 if (i * HAMMER2_ZONE_BYTES64 >= total_space)
746 n = pwrite(fd, buf, HAMMER2_PBUFSIZE,
747 volu_base + i * HAMMER2_ZONE_BYTES64);
748 if (n != HAMMER2_PBUFSIZE) {
761 alloc_direct(hammer2_off_t *basep, hammer2_blockref_t *bref, size_t bytes)
767 while ((bytes & 1) == 0) {
772 if (radix < HAMMER2_RADIX_MIN)
773 radix = HAMMER2_RADIX_MIN;
775 bzero(bref, sizeof(*bref));
776 bref->data_off = *basep | radix;
777 bref->vradix = radix;
779 *basep += 1U << radix;
783 * Borrow HAMMER1's directory hash algorithm #1 with a few modifications.
784 * The filename is split into fields which are hashed separately and then
787 * Differences include: bit 63 must be set to 1 for HAMMER2 (HAMMER1 sets
788 * it to 0), this is because bit63=0 is used for hidden hardlinked inodes.
789 * (This means we do not need to do a 0-check/or-with-0x100000000 either).
791 * Also, the iscsi crc code is used instead of the old crc32 code.
794 dirhash(const unsigned char *name, size_t len)
796 const unsigned char *aname = name;
803 * Filesystem version 6 or better will create directories
804 * using the ALG1 dirhash. This hash breaks the filename
805 * up into domains separated by special characters and
806 * hashes each domain independently.
808 * We also do a simple sub-sort using the first character
809 * of the filename in the top 5-bits.
817 for (i = j = 0; i < len; ++i) {
818 if (aname[i] == '.' ||
823 crcx += hammer2_icrc32(aname + j, i - j);
828 crcx += hammer2_icrc32(aname + j, i - j);
831 * The directory hash utilizes the top 32 bits of the 64-bit key.
832 * Bit 63 must be set to 1.
835 key |= (uint64_t)crcx << 32;
838 * l16 - crc of entire filename
840 * This crc reduces degenerate hash collision conditions
842 crcx = hammer2_icrc32(aname, len);
843 crcx = crcx ^ (crcx << 16);
844 key |= crcx & 0xFFFF0000U;
847 * Set bit 15. This allows readdir to strip bit 63 so a positive
848 * 64-bit cookie/offset can always be returned, and still guarantee
849 * that the values 0x0000-0x7FFF are available for artificial entries.
858 blkrefary_cmp(const void *b1, const void *b2)
860 const hammer2_blockref_t *bref1 = b1;
861 const hammer2_blockref_t *bref2 = b2;
862 if (bref1->key < bref2->key)
864 if (bref1->key > bref2->key)