2 * Copyright (c) 2011-2015 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>
55 #define MAXLABELS HAMMER2_SET_COUNT
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
;
100 int defaultlabels
= 1;
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) {
141 if (strcasecmp(optarg
, "none") == 0) {
144 if (NLabels
>= MAXLABELS
) {
146 "Limit of %d local labels",
149 Label
[NLabels
++] = optarg
;
150 if (strlen(Label
[NLabels
-1]) > HAMMER2_INODE_MAXNAME
) {
151 errx(1, "Root directory label too long "
156 BootAreaSize
= getsize(optarg
,
158 HAMMER2_BOOT_MAX_BYTES
, 2);
161 AuxAreaSize
= getsize(optarg
,
163 HAMMER2_REDO_MAX_BYTES
, 2);
166 Hammer2Version
= strtol(optarg
, NULL
, 0);
167 if (Hammer2Version
< HAMMER2_VOL_VERSION_MIN
||
168 Hammer2Version
>= HAMMER2_VOL_VERSION_WIP
) {
170 "I don't understand how to format "
171 "HAMMER2 version %d\n",
182 * Check Hammer2 version
184 if (Hammer2Version
< 0) {
185 size_t olen
= sizeof(Hammer2Version
);
186 Hammer2Version
= HAMMER2_VOL_VERSION_DEFAULT
;
187 if (sysctlbyname("vfs.hammer2.supported_version",
188 &Hammer2Version
, &olen
, NULL
, 0) == 0) {
189 if (Hammer2Version
>= HAMMER2_VOL_VERSION_WIP
) {
190 Hammer2Version
= HAMMER2_VOL_VERSION_WIP
- 1;
192 "newfs_hammer: WARNING: HAMMER2 VFS "
193 "supports higher version than I "
195 "using version %d\n",
200 "newfs_hammer: WARNING: HAMMER2 VFS not "
201 "loaded, cannot get version info.\n"
202 "Using version %d\n",
203 HAMMER2_VOL_VERSION_DEFAULT
);
210 if (ac
!= 1 || av
[0][0] == 0) {
211 fprintf(stderr
, "Exactly one disk device must be specified\n");
216 * Adjust Label[] and NLabels.
218 if (defaultlabels
== 0) {
221 char c
= av
[0][strlen(av
[0]) - 1];
223 Label
[NLabels
++] = "BOOT";
225 Label
[NLabels
++] = "ROOT";
227 Label
[NLabels
++] = "DATA";
231 * Collect volume information.
233 total_space
= check_volume(av
[0], &fd
);
236 * ~typically 8MB alignment to avoid edge cases for reserved blocks
237 * and so raid stripes (if any) operate efficiently.
239 total_space
&= ~HAMMER2_VOLUME_ALIGNMASK64
;
242 * Calculate defaults for the boot area size and round to the
243 * volume alignment boundary.
245 * NOTE: These areas are currently not used for booting but are
246 * reserved for future filesystem expansion.
248 if (BootAreaSize
== 0) {
249 BootAreaSize
= HAMMER2_BOOT_NOM_BYTES
;
250 while (BootAreaSize
> total_space
/ 20)
252 if (BootAreaSize
< HAMMER2_BOOT_MIN_BYTES
)
253 BootAreaSize
= HAMMER2_BOOT_MIN_BYTES
;
254 } else if (BootAreaSize
< HAMMER2_BOOT_MIN_BYTES
) {
255 BootAreaSize
= HAMMER2_BOOT_MIN_BYTES
;
257 BootAreaSize
= (BootAreaSize
+ HAMMER2_VOLUME_ALIGNMASK64
) &
258 ~HAMMER2_VOLUME_ALIGNMASK64
;
261 * Calculate defaults for the redo area size and round to the
262 * volume alignment boundary.
264 * NOTE: These areas are currently not used for logging but are
265 * reserved for future filesystem expansion.
267 if (AuxAreaSize
== 0) {
268 AuxAreaSize
= HAMMER2_REDO_NOM_BYTES
;
269 while (AuxAreaSize
> total_space
/ 20)
271 if (AuxAreaSize
< HAMMER2_REDO_MIN_BYTES
)
272 AuxAreaSize
= HAMMER2_REDO_MIN_BYTES
;
273 } else if (AuxAreaSize
< HAMMER2_REDO_MIN_BYTES
) {
274 AuxAreaSize
= HAMMER2_REDO_MIN_BYTES
;
276 AuxAreaSize
= (AuxAreaSize
+ HAMMER2_VOLUME_ALIGNMASK64
) &
277 ~HAMMER2_VOLUME_ALIGNMASK64
;
280 * We'll need to stuff this in the volume header soon.
282 uuid_to_string(&Hammer2_VolFSID
, &vol_fsid
, &status
);
283 uuid_to_string(&Hammer2_SupCLID
, &sup_clid_name
, &status
);
284 uuid_to_string(&Hammer2_SupFSID
, &sup_fsid_name
, &status
);
287 * Calculate the amount of reserved space. HAMMER2_ZONE_SEG (4MB)
288 * is reserved at the beginning of every 2GB of storage, rounded up.
289 * Thus a 200MB filesystem will still have a 4MB reserve area.
291 * We also include the boot and redo areas in the reserve. The
292 * reserve is used to help 'df' calculate the amount of available
295 reserved_space
= ((total_space
+ HAMMER2_ZONE_MASK64
) /
296 HAMMER2_ZONE_BYTES64
) * HAMMER2_ZONE_SEG64
;
298 free_space
= total_space
- reserved_space
-
299 BootAreaSize
- AuxAreaSize
;
301 format_hammer2(fd
, total_space
, free_space
);
305 printf("---------------------------------------------\n");
306 printf("version: %d\n", Hammer2Version
);
307 printf("total-size: %s (%jd bytes)\n",
308 sizetostr(total_space
),
309 (intmax_t)total_space
);
310 printf("boot-area-size: %s\n", sizetostr(BootAreaSize
));
311 printf("aux-area-size: %s\n", sizetostr(AuxAreaSize
));
312 printf("topo-reserved: %s\n", sizetostr(reserved_space
));
313 printf("free-space: %s\n", sizetostr(free_space
));
314 printf("vol-fsid: %s\n", vol_fsid
);
315 printf("sup-clid: %s\n", sup_clid_name
);
316 printf("sup-fsid: %s\n", sup_fsid_name
);
317 for (i
= 0; i
< NLabels
; ++i
) {
318 printf("PFS \"%s\"\n", Label
[i
]);
319 uuid_to_string(&Hammer2_PfsCLID
[i
], &pfs_clid_name
, &status
);
320 uuid_to_string(&Hammer2_PfsFSID
[i
], &pfs_fsid_name
, &status
);
321 printf(" clid %s\n", pfs_clid_name
);
322 printf(" fsid %s\n", pfs_fsid_name
);
334 "usage: newfs_hammer -L label [-f] [-b bootsize] "
335 "[-r redosize] [-V version] special ...\n"
341 * Convert the size in bytes to a human readable string.
345 sizetostr(hammer2_off_t size
)
349 if (size
< 1024 / 2) {
350 snprintf(buf
, sizeof(buf
), "%6.2f", (double)size
);
351 } else if (size
< 1024 * 1024 / 2) {
352 snprintf(buf
, sizeof(buf
), "%6.2fKB",
353 (double)size
/ 1024);
354 } else if (size
< 1024 * 1024 * 1024LL / 2) {
355 snprintf(buf
, sizeof(buf
), "%6.2fMB",
356 (double)size
/ (1024 * 1024));
357 } else if (size
< 1024 * 1024 * 1024LL * 1024LL / 2) {
358 snprintf(buf
, sizeof(buf
), "%6.2fGB",
359 (double)size
/ (1024 * 1024 * 1024LL));
361 snprintf(buf
, sizeof(buf
), "%6.2fTB",
362 (double)size
/ (1024 * 1024 * 1024LL * 1024LL));
368 * Convert a string to a 64 bit signed integer with various requirements.
371 getsize(const char *str
, int64_t minval
, int64_t maxval
, int powerof2
)
376 val
= strtoll(str
, &ptr
, 0);
395 errx(1, "Unknown suffix in number '%s'\n", str
);
399 errx(1, "Unknown suffix in number '%s'\n", str
);
403 errx(1, "Value too small: %s, min is %s\n",
404 str
, sizetostr(minval
));
408 errx(1, "Value too large: %s, max is %s\n",
409 str
, sizetostr(maxval
));
412 if ((powerof2
& 1) && (val
^ (val
- 1)) != ((val
<< 1) - 1)) {
413 errx(1, "Value not power of 2: %s\n", str
);
416 if ((powerof2
& 2) && (val
& HAMMER2_NEWFS_ALIGNMASK
)) {
417 errx(1, "Value not an integral multiple of %dK: %s",
418 HAMMER2_NEWFS_ALIGN
/ 1024, str
);
430 gettimeofday(&tv
, NULL
);
431 xtime
= tv
.tv_sec
* 1000000LL + tv
.tv_usec
;
436 * Figure out how big the volume is.
440 check_volume(const char *path
, int *fdp
)
442 struct partinfo pinfo
;
447 * Get basic information about the volume
449 *fdp
= open(path
, O_RDWR
);
451 err(1, "Unable to open %s R+W", path
);
452 if (ioctl(*fdp
, DIOCGPART
, &pinfo
) < 0) {
454 * Allow the formatting of regular files as HAMMER2 volumes
456 if (fstat(*fdp
, &st
) < 0)
457 err(1, "Unable to stat %s", path
);
461 * When formatting a block device as a HAMMER2 volume the
462 * sector size must be compatible. HAMMER2 uses 64K
463 * filesystem buffers but logical buffers for direct I/O
464 * can be as small as HAMMER2_LOGSIZE (16KB).
466 if (pinfo
.reserved_blocks
) {
467 errx(1, "HAMMER cannot be placed in a partition "
468 "which overlaps the disklabel or MBR");
470 if (pinfo
.media_blksize
> HAMMER2_PBUFSIZE
||
471 HAMMER2_PBUFSIZE
% pinfo
.media_blksize
) {
472 errx(1, "A media sector size of %d is not supported",
473 pinfo
.media_blksize
);
475 size
= pinfo
.media_size
;
477 printf("Volume %-15s size %s\n", path
, sizetostr(size
));
482 * Create the volume header, the super-root directory inode, and
483 * the writable snapshot subdirectory (named via the label) which
484 * is to be the initial mount point, or at least the first mount point.
486 * [----reserved_area----][boot_area][aux_area]
487 * [[vol_hdr]... ] [sroot][root]
489 * The sroot and root inodes eat 512 bytes each. newfs labels can only be
490 * 64 bytes so the root (snapshot) inode does not need to extend past 512
491 * bytes. We use the correct hash slot correct but note that because
492 * directory hashes are chained 16x, any slot in the inode will work.
494 * Also format the allocation map.
496 * NOTE: The passed total_space is 8MB-aligned to avoid edge cases.
500 format_hammer2(int fd
, hammer2_off_t total_space
, hammer2_off_t free_space
)
502 char *buf
= malloc(HAMMER2_PBUFSIZE
);
503 hammer2_volume_data_t
*vol
;
504 hammer2_inode_data_t
*rawip
;
505 hammer2_blockref_t sroot_blockref
;
506 hammer2_blockref_t root_blockref
[MAXLABELS
];
508 hammer2_off_t volu_base
= 0;
509 hammer2_off_t boot_base
= HAMMER2_ZONE_SEG
;
510 hammer2_off_t aux_base
= boot_base
+ BootAreaSize
;
511 hammer2_off_t alloc_base
= aux_base
+ AuxAreaSize
;
512 hammer2_off_t tmp_base
;
517 * Clear the entire reserve for the first 2G segment and
518 * make sure we can write to the last block.
520 bzero(buf
, HAMMER2_PBUFSIZE
);
521 tmp_base
= volu_base
;
522 for (i
= 0; i
< HAMMER2_ZONE_BLOCKS_SEG
; ++i
) {
523 n
= pwrite(fd
, buf
, HAMMER2_PBUFSIZE
, tmp_base
);
524 if (n
!= HAMMER2_PBUFSIZE
) {
528 tmp_base
+= HAMMER2_PBUFSIZE
;
531 n
= pwrite(fd
, buf
, HAMMER2_PBUFSIZE
,
532 volu_base
+ total_space
- HAMMER2_PBUFSIZE
);
533 if (n
!= HAMMER2_PBUFSIZE
) {
534 perror("write (at-end-of-volume)");
539 * Make sure alloc_base won't cross the reserved area at the
540 * beginning of each 2GB zone.
542 * Reserve space for the super-root inode and the root inode.
543 * Make sure they are in the same 64K block to simplify our code.
545 assert((alloc_base
& HAMMER2_PBUFMASK
) == 0);
546 assert(alloc_base
< HAMMER2_ZONE_BYTES64
- HAMMER2_ZONE_SEG
);
548 bzero(buf
, HAMMER2_PBUFSIZE
);
550 alloc_base
&= ~HAMMER2_PBUFMASK64
;
551 alloc_direct(&alloc_base
, &sroot_blockref
, HAMMER2_INODE_BYTES
);
553 for (i
= 0; i
< NLabels
; ++i
) {
554 uuidgen(&Hammer2_PfsCLID
[i
], 1);
555 uuidgen(&Hammer2_PfsFSID
[i
], 1);
557 alloc_direct(&alloc_base
, &root_blockref
[i
],
558 HAMMER2_INODE_BYTES
);
559 assert(((sroot_blockref
.data_off
^ root_blockref
[i
].data_off
) &
560 HAMMER2_OFF_MASK_HI
) == 0);
563 * Format the root directory inode, which is left empty.
565 rawip
= (void *)(buf
+ (HAMMER2_OFF_MASK_LO
&
566 root_blockref
[i
].data_off
));
567 rawip
->meta
.version
= HAMMER2_INODE_VERSION_ONE
;
568 rawip
->meta
.ctime
= now
;
569 rawip
->meta
.mtime
= now
;
570 /* rawip->atime = now; NOT IMPL MUST BE ZERO */
571 rawip
->meta
.btime
= now
;
572 rawip
->meta
.type
= HAMMER2_OBJTYPE_DIRECTORY
;
573 rawip
->meta
.mode
= 0755;
574 rawip
->meta
.inum
= 1; /* root inode, inumber 1 */
575 rawip
->meta
.nlinks
= 1; /* directory link count compat */
577 rawip
->meta
.name_len
= strlen(Label
[i
]);
578 bcopy(Label
[i
], rawip
->filename
, rawip
->meta
.name_len
);
579 rawip
->meta
.name_key
=
580 dirhash(rawip
->filename
, rawip
->meta
.name_len
);
583 * Compression mode and supported copyids.
585 * Do not allow compression when creating any "BOOT" label
586 * (pfs-create also does the same if the pfs is named "BOOT")
588 if (strcasecmp(Label
[i
], "BOOT") == 0) {
589 rawip
->meta
.comp_algo
= HAMMER2_ENC_ALGO(
590 HAMMER2_COMP_AUTOZERO
);
591 rawip
->meta
.check_algo
= HAMMER2_ENC_ALGO(
592 HAMMER2_CHECK_ISCSI32
);
594 rawip
->meta
.comp_algo
= HAMMER2_ENC_ALGO(
595 HAMMER2_COMP_NEWFS_DEFAULT
);
596 rawip
->meta
.check_algo
= HAMMER2_ENC_ALGO(
597 HAMMER2_CHECK_ISCSI32
);
601 * NOTE: We leave nmasters set to 0, which means that we
602 * don't know how many masters there are. The quorum
603 * calculation will effectively be 1 ( 0 / 2 + 1 ).
605 rawip
->meta
.pfs_clid
= Hammer2_PfsCLID
[i
];
606 rawip
->meta
.pfs_fsid
= Hammer2_PfsFSID
[i
];
607 rawip
->meta
.pfs_type
= HAMMER2_PFSTYPE_MASTER
;
608 rawip
->meta
.op_flags
|= HAMMER2_OPFLAG_PFSROOT
;
610 /* first allocatable inode number */
611 rawip
->meta
.pfs_inum
= 16;
613 /* rawip->u.blockset is left empty */
616 * The root blockref will be stored in the super-root inode as
617 * the only directory entry. The copyid here is the actual
618 * copyid of the storage ref.
620 * The key field for a directory entry's blockref is
621 * essentially the name key for the entry.
623 root_blockref
[i
].key
= rawip
->meta
.name_key
;
624 root_blockref
[i
].copyid
= HAMMER2_COPYID_LOCAL
;
625 root_blockref
[i
].keybits
= 0;
626 root_blockref
[i
].check
.iscsi32
.value
=
627 hammer2_icrc32(rawip
, sizeof(*rawip
));
628 root_blockref
[i
].type
= HAMMER2_BREF_TYPE_INODE
;
629 root_blockref
[i
].methods
=
630 HAMMER2_ENC_CHECK(HAMMER2_CHECK_ISCSI32
) |
631 HAMMER2_ENC_COMP(HAMMER2_COMP_NONE
);
632 root_blockref
[i
].mirror_tid
= 16;
633 root_blockref
[i
].flags
= HAMMER2_BREF_FLAG_PFSROOT
;
637 * Format the super-root directory inode, giving it one directory
638 * entry (root_blockref) and fixup the icrc method.
640 * The superroot contains one directory entry pointing at the root
641 * inode (named via the label). Inodes contain one blockset which
642 * is fully associative so we can put the entry anywhere without
643 * having to worry about the hash. Use index 0.
645 rawip
= (void *)(buf
+ (HAMMER2_OFF_MASK_LO
& sroot_blockref
.data_off
));
646 rawip
->meta
.version
= HAMMER2_INODE_VERSION_ONE
;
647 rawip
->meta
.ctime
= now
;
648 rawip
->meta
.mtime
= now
;
649 /* rawip->meta.atime = now; NOT IMPL MUST BE ZERO */
650 rawip
->meta
.btime
= now
;
651 rawip
->meta
.type
= HAMMER2_OBJTYPE_DIRECTORY
;
652 rawip
->meta
.mode
= 0700; /* super-root - root only */
653 rawip
->meta
.inum
= 0; /* super root inode, inumber 0 */
654 rawip
->meta
.nlinks
= 2; /* directory link count compat */
656 rawip
->meta
.name_len
= 0; /* super-root is unnamed */
657 rawip
->meta
.name_key
= 0;
659 rawip
->meta
.comp_algo
= HAMMER2_ENC_ALGO(HAMMER2_COMP_AUTOZERO
);
660 rawip
->meta
.check_algo
= HAMMER2_ENC_ALGO(HAMMER2_CHECK_ISCSI32
);
663 * The super-root is flagged as a PFS and typically given its own
664 * random FSID, making it possible to mirror an entire HAMMER2 disk
665 * snapshots and all if desired. PFS ids are used to match up
666 * mirror sources and targets and cluster copy sources and targets.
668 * (XXX whole-disk logical mirroring is not really supported in
669 * the first attempt because each PFS is in its own modify/mirror
670 * transaction id domain, so normal mechanics cannot cross a PFS
673 rawip
->meta
.pfs_clid
= Hammer2_SupCLID
;
674 rawip
->meta
.pfs_fsid
= Hammer2_SupFSID
;
675 rawip
->meta
.pfs_type
= HAMMER2_PFSTYPE_SUPROOT
;
676 snprintf(rawip
->filename
, sizeof(rawip
->filename
), "SUPROOT");
677 rawip
->meta
.name_key
= 0;
678 rawip
->meta
.name_len
= strlen(rawip
->filename
);
680 /* The super-root has an inode number of 0 */
681 rawip
->meta
.pfs_inum
= 0;
684 * Currently newfs_hammer2 just throws the PFS inodes into the
685 * top-level block table at the volume root and doesn't try to
686 * create an indirect block, so we are limited to ~4 at filesystem
687 * creation time. More can be added after mounting.
689 qsort(root_blockref
, NLabels
, sizeof(root_blockref
[0]), blkrefary_cmp
);
690 for (i
= 0; i
< NLabels
; ++i
)
691 rawip
->u
.blockset
.blockref
[i
] = root_blockref
[i
];
694 * The sroot blockref will be stored in the volume header.
696 sroot_blockref
.copyid
= HAMMER2_COPYID_LOCAL
;
697 sroot_blockref
.keybits
= 0;
698 sroot_blockref
.check
.iscsi32
.value
=
699 hammer2_icrc32(rawip
, sizeof(*rawip
));
700 sroot_blockref
.type
= HAMMER2_BREF_TYPE_INODE
;
701 sroot_blockref
.methods
= HAMMER2_ENC_CHECK(HAMMER2_CHECK_ISCSI32
) |
702 HAMMER2_ENC_COMP(HAMMER2_COMP_AUTOZERO
);
703 sroot_blockref
.mirror_tid
= 16;
707 * Write out the 64K HAMMER2 block containing the root and sroot.
709 n
= pwrite(fd
, buf
, HAMMER2_PBUFSIZE
,
710 sroot_blockref
.data_off
& HAMMER2_OFF_MASK_HI
);
711 if (n
!= HAMMER2_PBUFSIZE
) {
717 * Format the volume header.
719 * The volume header points to sroot_blockref. Also be absolutely
720 * sure that allocator_beg is set.
722 bzero(buf
, HAMMER2_PBUFSIZE
);
725 vol
->magic
= HAMMER2_VOLUME_ID_HBO
;
726 vol
->boot_beg
= boot_base
;
727 vol
->boot_end
= boot_base
+ BootAreaSize
;
728 vol
->aux_beg
= aux_base
;
729 vol
->aux_end
= aux_base
+ AuxAreaSize
;
730 vol
->volu_size
= total_space
;
731 vol
->version
= Hammer2Version
;
734 vol
->fsid
= Hammer2_VolFSID
;
735 vol
->fstype
= Hammer2_FSType
;
737 vol
->peer_type
= DMSG_PEER_HAMMER2
; /* LNK_CONN identification */
739 vol
->allocator_size
= free_space
;
740 vol
->allocator_free
= free_space
;
741 vol
->allocator_beg
= alloc_base
;
743 vol
->sroot_blockset
.blockref
[0] = sroot_blockref
;
744 vol
->mirror_tid
= 16; /* all blockref mirror TIDs set to 16 */
745 vol
->freemap_tid
= 16; /* all blockref mirror TIDs set to 16 */
746 vol
->icrc_sects
[HAMMER2_VOL_ICRC_SECT1
] =
747 hammer2_icrc32((char *)vol
+ HAMMER2_VOLUME_ICRC1_OFF
,
748 HAMMER2_VOLUME_ICRC1_SIZE
);
751 * Set ICRC_SECT0 after all remaining elements of sect0 have been
752 * populated in the volume header. Note hat ICRC_SECT* (except for
753 * SECT0) are part of sect0.
755 vol
->icrc_sects
[HAMMER2_VOL_ICRC_SECT0
] =
756 hammer2_icrc32((char *)vol
+ HAMMER2_VOLUME_ICRC0_OFF
,
757 HAMMER2_VOLUME_ICRC0_SIZE
);
758 vol
->icrc_volheader
=
759 hammer2_icrc32((char *)vol
+ HAMMER2_VOLUME_ICRCVH_OFF
,
760 HAMMER2_VOLUME_ICRCVH_SIZE
);
763 * Write the volume header and all alternates.
765 for (i
= 0; i
< HAMMER2_NUM_VOLHDRS
; ++i
) {
766 if (i
* HAMMER2_ZONE_BYTES64
>= total_space
)
768 n
= pwrite(fd
, buf
, HAMMER2_PBUFSIZE
,
769 volu_base
+ i
* HAMMER2_ZONE_BYTES64
);
770 if (n
!= HAMMER2_PBUFSIZE
) {
783 alloc_direct(hammer2_off_t
*basep
, hammer2_blockref_t
*bref
, size_t bytes
)
789 while ((bytes
& 1) == 0) {
794 if (radix
< HAMMER2_RADIX_MIN
)
795 radix
= HAMMER2_RADIX_MIN
;
797 bzero(bref
, sizeof(*bref
));
798 bref
->data_off
= *basep
| radix
;
799 bref
->vradix
= radix
;
801 *basep
+= 1U << radix
;
805 * Borrow HAMMER1's directory hash algorithm #1 with a few modifications.
806 * The filename is split into fields which are hashed separately and then
809 * Differences include: bit 63 must be set to 1 for HAMMER2 (HAMMER1 sets
810 * it to 0), this is because bit63=0 is used for hidden hardlinked inodes.
811 * (This means we do not need to do a 0-check/or-with-0x100000000 either).
813 * Also, the iscsi crc code is used instead of the old crc32 code.
816 dirhash(const unsigned char *name
, size_t len
)
818 const unsigned char *aname
= name
;
825 * Filesystem version 6 or better will create directories
826 * using the ALG1 dirhash. This hash breaks the filename
827 * up into domains separated by special characters and
828 * hashes each domain independently.
830 * We also do a simple sub-sort using the first character
831 * of the filename in the top 5-bits.
839 for (i
= j
= 0; i
< len
; ++i
) {
840 if (aname
[i
] == '.' ||
845 crcx
+= hammer2_icrc32(aname
+ j
, i
- j
);
850 crcx
+= hammer2_icrc32(aname
+ j
, i
- j
);
853 * The directory hash utilizes the top 32 bits of the 64-bit key.
854 * Bit 63 must be set to 1.
857 key
|= (uint64_t)crcx
<< 32;
860 * l16 - crc of entire filename
862 * This crc reduces degenerate hash collision conditions
864 crcx
= hammer2_icrc32(aname
, len
);
865 crcx
= crcx
^ (crcx
<< 16);
866 key
|= crcx
& 0xFFFF0000U
;
869 * Set bit 15. This allows readdir to strip bit 63 so a positive
870 * 64-bit cookie/offset can always be returned, and still guarantee
871 * that the values 0x0000-0x7FFF are available for artificial entries.
880 blkrefary_cmp(const void *b1
, const void *b2
)
882 const hammer2_blockref_t
*bref1
= b1
;
883 const hammer2_blockref_t
*bref2
= b2
;
884 if (bref1
->key
< bref2
->key
)
886 if (bref1
->key
> bref2
->key
)