2 * SPDX-License-Identifier: BSD-4-Clause
4 * Copyright (c) 1980, 1989, 1993 The Regents of the University of California.
5 * Copyright (c) 2000 Christoph Herrmann, Thomas-Henning von Kamptz
6 * Copyright (c) 2012 The FreeBSD Foundation
9 * This code is derived from software contributed to Berkeley by
10 * Christoph Herrmann and Thomas-Henning von Kamptz, Munich and Frankfurt.
12 * Portions of this software were developed by Edward Tomasz Napierala
13 * under sponsorship from the FreeBSD Foundation.
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 * 3. All advertising materials mentioning features or use of this software
24 * must display the following acknowledgment:
25 * This product includes software developed by the University of
26 * California, Berkeley and its contributors, as well as Christoph
27 * Herrmann and Thomas-Henning von Kamptz.
28 * 4. Neither the name of the University nor the names of its contributors
29 * may be used to endorse or promote products derived from this software
30 * without specific prior written permission.
32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44 * $TSHeader: src/sbin/growfs/growfs.c,v 1.5 2000/12/12 19:31:00 tomsoft Exp $
49 static const char copyright[] =
50 "@(#) Copyright (c) 2000 Christoph Herrmann, Thomas-Henning von Kamptz\n\
51 Copyright (c) 1980, 1989, 1993 The Regents of the University of California.\n\
52 All rights reserved.\n";
55 #include <sys/cdefs.h>
56 __FBSDID("$FreeBSD$");
58 #include <sys/param.h>
59 #include <sys/ioctl.h>
62 #include <sys/ucred.h>
63 #include <sys/mount.h>
81 #include <ufs/ufs/dinode.h>
82 #include <ufs/ffs/fs.h>
89 int _dbg_lvl_ = (DL_INFO); /* DL_TRC */
96 #define sblock fsun1.fs /* the new superblock */
97 #define osblock fsun2.fs /* the old superblock */
103 #define acg cgun1.cg /* a cylinder cgroup (new) */
104 #define aocg cgun2.cg /* an old cylinder group */
106 static struct csum *fscs; /* cylinder summary */
108 static void growfs(int, int, unsigned int);
109 static void rdfs(ufs2_daddr_t, size_t, void *, int);
110 static void wtfs(ufs2_daddr_t, size_t, void *, int, unsigned int);
111 static int charsperline(void);
112 static void usage(void);
113 static int isblock(struct fs *, unsigned char *, int);
114 static void clrblock(struct fs *, unsigned char *, int);
115 static void setblock(struct fs *, unsigned char *, int);
116 static void initcg(int, time_t, int, unsigned int);
117 static void updjcg(int, time_t, int, int, unsigned int);
118 static void updcsloc(time_t, int, int, unsigned int);
119 static void frag_adjust(ufs2_daddr_t, int);
120 static void updclst(int);
121 static void cgckhash(struct cg *);
124 * Here we actually start growing the file system. We basically read the
125 * cylinder summary from the first cylinder group as we want to update
126 * this on the fly during our various operations. First we handle the
127 * changes in the former last cylinder group. Afterwards we create all new
128 * cylinder groups. Now we handle the cylinder group containing the
129 * cylinder summary which might result in a relocation of the whole
130 * structure. In the end we write back the updated cylinder summary, the
131 * new superblock, and slightly patched versions of the super block
135 growfs(int fsi, int fso, unsigned int Nflag)
148 * Get the cylinder summary into the memory.
150 fscs = (struct csum *)calloc((size_t)1, (size_t)sblock.fs_cssize);
152 errx(1, "calloc failed");
153 memcpy(fscs, osblock.fs_csp, osblock.fs_cssize);
154 free(osblock.fs_csp);
155 osblock.fs_csp = NULL;
156 sblock.fs_csp = fscs;
160 struct csum *dbg_csp;
166 for (dbg_csc = 0; dbg_csc < osblock.fs_ncg; dbg_csc++) {
167 snprintf(dbg_line, sizeof(dbg_line),
168 "%d. old csum in old location", dbg_csc);
169 DBG_DUMP_CSUM(&osblock, dbg_line, dbg_csp++);
172 #endif /* FS_DEBUG */
173 DBG_PRINT0("fscs read\n");
176 * Do all needed changes in the former last cylinder group.
178 updjcg(osblock.fs_ncg - 1, modtime, fsi, fso, Nflag);
181 * Dump out summary information about file system.
184 #define B2MBFACTOR (1 / (1024.0 * 1024.0))
185 printf("growfs: %.1fMB (%jd sectors) block size %d, fragment size %d\n",
186 (float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR,
187 (intmax_t)fsbtodb(&sblock, sblock.fs_size), sblock.fs_bsize,
189 printf("\tusing %d cylinder groups of %.2fMB, %d blks, %d inodes.\n",
190 sblock.fs_ncg, (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR,
191 sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg);
192 if (sblock.fs_flags & FS_DOSOFTDEP)
193 printf("\twith soft updates\n");
195 #endif /* FS_DEBUG */
198 * Now build the cylinders group blocks and
199 * then print out indices of cylinder groups.
201 printf("super-block backups (for fsck_ffs -b #) at:\n");
203 width = charsperline();
206 * Iterate for only the new cylinder groups.
208 for (cylno = osblock.fs_ncg; cylno < sblock.fs_ncg; cylno++) {
209 initcg(cylno, modtime, fso, Nflag);
210 j = sprintf(tmpbuf, " %jd%s",
211 (intmax_t)fsbtodb(&sblock, cgsblock(&sblock, cylno)),
212 cylno < (sblock.fs_ncg - 1) ? "," : "" );
213 if (i + j >= width) {
218 printf("%s", tmpbuf);
224 * Do all needed changes in the first cylinder group.
225 * allocate blocks in new location
227 updcsloc(modtime, fsi, fso, Nflag);
230 * Clean up the dynamic fields in our superblock.
233 * The following fields are currently distributed from the superblock
243 * We probably should rather change the summary for the cylinder group
244 * statistics here to the value of what would be in there, if the file
245 * system were created initially with the new size. Therefor we still
246 * need to find an easy way of calculating that.
247 * Possibly we can try to read the first superblock copy and apply the
248 * "diffed" stats between the old and new superblock by still copying
249 * certain parameters onto that.
251 sblock.fs_time = modtime;
255 sblock.fs_cgrotor = 0;
257 memset((void *)&sblock.fs_fsmnt, 0, sizeof(sblock.fs_fsmnt));
260 * Now write the new superblock, its summary information,
261 * and all the alternates back to disk.
263 if (!Nflag && sbput(fso, &sblock, sblock.fs_ncg) != 0)
264 errc(2, EIO, "could not write updated superblock");
265 DBG_PRINT0("fscs written\n");
269 struct csum *dbg_csp;
274 for (dbg_csc = 0; dbg_csc < sblock.fs_ncg; dbg_csc++) {
275 snprintf(dbg_line, sizeof(dbg_line),
276 "%d. new csum in new location", dbg_csc);
277 DBG_DUMP_CSUM(&sblock, dbg_line, dbg_csp++);
280 #endif /* FS_DEBUG */
282 DBG_PRINT0("sblock written\n");
283 DBG_DUMP_FS(&sblock, "new initial sblock");
285 DBG_PRINT0("sblock copies written\n");
286 DBG_DUMP_FS(&sblock, "new other sblocks");
293 * This creates a new cylinder group structure, for more details please see
294 * the source of newfs(8), as this function is taken over almost unchanged.
295 * As this is never called for the first cylinder group, the special
296 * provisions for that case are removed here.
299 initcg(int cylno, time_t modtime, int fso, unsigned int Nflag)
302 static caddr_t iobuf;
303 static long iobufsize;
306 ufs2_daddr_t i, cbase, dmax;
307 struct ufs1_dinode *dp1;
308 struct ufs2_dinode *dp2;
310 uint j, d, dupper, dlower;
313 iobufsize = 2 * sblock.fs_bsize;
314 if ((iobuf = malloc(iobufsize)) == NULL)
315 errx(37, "panic: cannot allocate I/O buffer");
316 memset(iobuf, '\0', iobufsize);
319 * Determine block bounds for cylinder group.
320 * Allow space for super block summary information in first
323 cbase = cgbase(&sblock, cylno);
324 dmax = cbase + sblock.fs_fpg;
325 if (dmax > sblock.fs_size)
326 dmax = sblock.fs_size;
327 dlower = cgsblock(&sblock, cylno) - cbase;
328 dupper = cgdmin(&sblock, cylno) - cbase;
329 if (cylno == 0) /* XXX fscs may be relocated */
330 dupper += howmany(sblock.fs_cssize, sblock.fs_fsize);
332 memset(&acg, 0, sblock.fs_cgsize);
333 acg.cg_time = modtime;
334 acg.cg_magic = CG_MAGIC;
336 acg.cg_niblk = sblock.fs_ipg;
337 acg.cg_initediblk = MIN(sblock.fs_ipg, 2 * INOPB(&sblock));
338 acg.cg_ndblk = dmax - cbase;
339 if (sblock.fs_contigsumsize > 0)
340 acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag;
341 start = &acg.cg_space[0] - (u_char *)(&acg.cg_firstfield);
342 if (sblock.fs_magic == FS_UFS2_MAGIC) {
343 acg.cg_iusedoff = start;
345 acg.cg_old_ncyl = sblock.fs_old_cpg;
346 acg.cg_old_time = acg.cg_time;
348 acg.cg_old_niblk = acg.cg_niblk;
350 acg.cg_initediblk = 0;
351 acg.cg_old_btotoff = start;
352 acg.cg_old_boff = acg.cg_old_btotoff +
353 sblock.fs_old_cpg * sizeof(int32_t);
354 acg.cg_iusedoff = acg.cg_old_boff +
355 sblock.fs_old_cpg * sizeof(u_int16_t);
357 acg.cg_freeoff = acg.cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT);
358 acg.cg_nextfreeoff = acg.cg_freeoff + howmany(sblock.fs_fpg, CHAR_BIT);
359 if (sblock.fs_contigsumsize > 0) {
360 acg.cg_clustersumoff =
361 roundup(acg.cg_nextfreeoff, sizeof(u_int32_t));
362 acg.cg_clustersumoff -= sizeof(u_int32_t);
363 acg.cg_clusteroff = acg.cg_clustersumoff +
364 (sblock.fs_contigsumsize + 1) * sizeof(u_int32_t);
365 acg.cg_nextfreeoff = acg.cg_clusteroff +
366 howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT);
368 if (acg.cg_nextfreeoff > (unsigned)sblock.fs_cgsize) {
370 * This should never happen as we would have had that panic
371 * already on file system creation
373 errx(37, "panic: cylinder group too big");
375 acg.cg_cs.cs_nifree += sblock.fs_ipg;
377 for (ino = 0; ino < UFS_ROOTINO; ino++) {
378 setbit(cg_inosused(&acg), ino);
379 acg.cg_cs.cs_nifree--;
382 * Initialize the initial inode blocks.
384 dp1 = (struct ufs1_dinode *)(void *)iobuf;
385 dp2 = (struct ufs2_dinode *)(void *)iobuf;
386 for (i = 0; i < acg.cg_initediblk; i++) {
387 if (sblock.fs_magic == FS_UFS1_MAGIC) {
388 dp1->di_gen = arc4random();
391 dp2->di_gen = arc4random();
395 wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno)), iobufsize, iobuf,
398 * For the old file system, we have to initialize all the inodes.
400 if (sblock.fs_magic == FS_UFS1_MAGIC &&
401 sblock.fs_ipg > 2 * INOPB(&sblock)) {
402 for (i = 2 * sblock.fs_frag;
403 i < sblock.fs_ipg / INOPF(&sblock);
404 i += sblock.fs_frag) {
405 dp1 = (struct ufs1_dinode *)(void *)iobuf;
406 for (j = 0; j < INOPB(&sblock); j++) {
407 dp1->di_gen = arc4random();
410 wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno) + i),
411 sblock.fs_bsize, iobuf, fso, Nflag);
416 * In cylno 0, beginning space is reserved
417 * for boot and super blocks.
419 for (d = 0; d < dlower; d += sblock.fs_frag) {
420 blkno = d / sblock.fs_frag;
421 setblock(&sblock, cg_blksfree(&acg), blkno);
422 if (sblock.fs_contigsumsize > 0)
423 setbit(cg_clustersfree(&acg), blkno);
424 acg.cg_cs.cs_nbfree++;
426 sblock.fs_dsize += dlower;
428 sblock.fs_dsize += acg.cg_ndblk - dupper;
429 sblock.fs_old_dsize = sblock.fs_dsize;
430 if ((i = dupper % sblock.fs_frag)) {
431 acg.cg_frsum[sblock.fs_frag - i]++;
432 for (d = dupper + sblock.fs_frag - i; dupper < d; dupper++) {
433 setbit(cg_blksfree(&acg), dupper);
434 acg.cg_cs.cs_nffree++;
437 for (d = dupper; d + sblock.fs_frag <= acg.cg_ndblk;
438 d += sblock.fs_frag) {
439 blkno = d / sblock.fs_frag;
440 setblock(&sblock, cg_blksfree(&acg), blkno);
441 if (sblock.fs_contigsumsize > 0)
442 setbit(cg_clustersfree(&acg), blkno);
443 acg.cg_cs.cs_nbfree++;
445 if (d < acg.cg_ndblk) {
446 acg.cg_frsum[acg.cg_ndblk - d]++;
447 for (; d < acg.cg_ndblk; d++) {
448 setbit(cg_blksfree(&acg), d);
449 acg.cg_cs.cs_nffree++;
452 if (sblock.fs_contigsumsize > 0) {
453 int32_t *sump = cg_clustersum(&acg);
454 u_char *mapp = cg_clustersfree(&acg);
459 for (i = 0; i < acg.cg_nclusterblks; i++) {
460 if ((map & bit) != 0)
463 if (run > sblock.fs_contigsumsize)
464 run = sblock.fs_contigsumsize;
468 if ((i & (CHAR_BIT - 1)) != CHAR_BIT - 1)
476 if (run > sblock.fs_contigsumsize)
477 run = sblock.fs_contigsumsize;
481 sblock.fs_cstotal.cs_ndir += acg.cg_cs.cs_ndir;
482 sblock.fs_cstotal.cs_nffree += acg.cg_cs.cs_nffree;
483 sblock.fs_cstotal.cs_nbfree += acg.cg_cs.cs_nbfree;
484 sblock.fs_cstotal.cs_nifree += acg.cg_cs.cs_nifree;
488 wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)), sblock.fs_cgsize, &acg,
490 DBG_DUMP_CG(&sblock, "new cg", &acg);
497 * Here we add or subtract (sign +1/-1) the available fragments in a given
498 * block to or from the fragment statistics. By subtracting before and adding
499 * after an operation on the free frag map we can easy update the fragment
500 * statistic, which seems to be otherwise a rather complex operation.
503 frag_adjust(ufs2_daddr_t frag, int sign)
505 DBG_FUNC("frag_adjust")
513 * Here frag only needs to point to any fragment in the block we want
516 for (f = rounddown(frag, sblock.fs_frag);
517 f < roundup(frag + 1, sblock.fs_frag); f++) {
519 * Count contiguous free fragments.
521 if (isset(cg_blksfree(&acg), f)) {
524 if (fragsize && fragsize < sblock.fs_frag) {
526 * We found something in between.
528 acg.cg_frsum[fragsize] += sign;
529 DBG_PRINT2("frag_adjust [%d]+=%d\n",
535 if (fragsize && fragsize < sblock.fs_frag) {
537 * We found something.
539 acg.cg_frsum[fragsize] += sign;
540 DBG_PRINT2("frag_adjust [%d]+=%d\n", fragsize, sign);
542 DBG_PRINT2("frag_adjust [[%d]]+=%d\n", fragsize, sign);
549 * Here we do all needed work for the former last cylinder group. It has to be
550 * changed in any case, even if the file system ended exactly on the end of
551 * this group, as there is some slightly inconsistent handling of the number
552 * of cylinders in the cylinder group. We start again by reading the cylinder
553 * group from disk. If the last block was not fully available, we first handle
554 * the missing fragments, then we handle all new full blocks in that file
555 * system and finally we handle the new last fragmented block in the file
556 * system. We again have to handle the fragment statistics rotational layout
557 * tables and cluster summary during all those operations.
560 updjcg(int cylno, time_t modtime, int fsi, int fso, unsigned int Nflag)
563 ufs2_daddr_t cbase, dmax;
571 * Read the former last (joining) cylinder group from disk, and make
574 rdfs(fsbtodb(&osblock, cgtod(&osblock, cylno)),
575 (size_t)osblock.fs_cgsize, (void *)&aocg, fsi);
576 DBG_PRINT0("jcg read\n");
577 DBG_DUMP_CG(&sblock, "old joining cg", &aocg);
579 memcpy((void *)&cgun1, (void *)&cgun2, sizeof(cgun2));
582 * If the cylinder group had already its new final size almost
583 * nothing is to be done ... except:
584 * For some reason the value of cg_ncyl in the last cylinder group has
585 * to be zero instead of fs_cpg. As this is now no longer the last
586 * cylinder group we have to change that value now to fs_cpg.
589 if (cgbase(&osblock, cylno + 1) == osblock.fs_size) {
590 if (sblock.fs_magic == FS_UFS1_MAGIC)
591 acg.cg_old_ncyl = sblock.fs_old_cpg;
594 wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)),
595 (size_t)sblock.fs_cgsize, (void *)&acg, fso, Nflag);
596 DBG_PRINT0("jcg written\n");
597 DBG_DUMP_CG(&sblock, "new joining cg", &acg);
604 * Set up some variables needed later.
606 cbase = cgbase(&sblock, cylno);
607 dmax = cbase + sblock.fs_fpg;
608 if (dmax > sblock.fs_size)
609 dmax = sblock.fs_size;
612 * Set pointer to the cylinder summary for our cylinder group.
617 * Touch the cylinder group, update all fields in the cylinder group as
618 * needed, update the free space in the superblock.
620 acg.cg_time = modtime;
621 if ((unsigned)cylno == sblock.fs_ncg - 1) {
623 * This is still the last cylinder group.
625 if (sblock.fs_magic == FS_UFS1_MAGIC)
627 sblock.fs_old_ncyl % sblock.fs_old_cpg;
629 acg.cg_old_ncyl = sblock.fs_old_cpg;
631 DBG_PRINT2("jcg dbg: %d %u", cylno, sblock.fs_ncg);
633 if (sblock.fs_magic == FS_UFS1_MAGIC)
634 DBG_PRINT2("%d %u", acg.cg_old_ncyl, sblock.fs_old_cpg);
637 acg.cg_ndblk = dmax - cbase;
638 sblock.fs_dsize += acg.cg_ndblk - aocg.cg_ndblk;
639 sblock.fs_old_dsize = sblock.fs_dsize;
640 if (sblock.fs_contigsumsize > 0)
641 acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag;
644 * Now we have to update the free fragment bitmap for our new free
645 * space. There again we have to handle the fragmentation and also
646 * the rotational layout tables and the cluster summary. This is
647 * also done per fragment for the first new block if the old file
648 * system end was not on a block boundary, per fragment for the new
649 * last block if the new file system end is not on a block boundary,
650 * and per block for all space in between.
652 * Handle the first new block here if it was partially available
655 if (osblock.fs_size % sblock.fs_frag) {
656 if (roundup(osblock.fs_size, sblock.fs_frag) <=
659 * The new space is enough to fill at least this
663 for (i = roundup(osblock.fs_size - cbase,
664 sblock.fs_frag) - 1; i >= osblock.fs_size - cbase;
666 setbit(cg_blksfree(&acg), i);
667 acg.cg_cs.cs_nffree++;
672 * Check if the fragment just created could join an
673 * already existing fragment at the former end of the
676 if (isblock(&sblock, cg_blksfree(&acg),
677 ((osblock.fs_size - cgbase(&sblock, cylno)) /
680 * The block is now completely available.
682 DBG_PRINT0("block was\n");
683 acg.cg_frsum[osblock.fs_size % sblock.fs_frag]--;
684 acg.cg_cs.cs_nbfree++;
685 acg.cg_cs.cs_nffree -= sblock.fs_frag;
686 k = rounddown(osblock.fs_size - cbase,
688 updclst((osblock.fs_size - cbase) /
692 * Lets rejoin a possible partially growed
696 while (isset(cg_blksfree(&acg), i) &&
697 (i >= rounddown(osblock.fs_size - cbase,
704 acg.cg_frsum[k + j]++;
708 * We only grow by some fragments within this last
711 for (i = sblock.fs_size - cbase - 1;
712 i >= osblock.fs_size - cbase; i--) {
713 setbit(cg_blksfree(&acg), i);
714 acg.cg_cs.cs_nffree++;
718 * Lets rejoin a possible partially growed fragment.
721 while (isset(cg_blksfree(&acg), i) &&
722 (i >= rounddown(osblock.fs_size - cbase,
729 acg.cg_frsum[k + j]++;
734 * Handle all new complete blocks here.
736 for (i = roundup(osblock.fs_size - cbase, sblock.fs_frag);
737 i + sblock.fs_frag <= dmax - cbase; /* XXX <= or only < ? */
738 i += sblock.fs_frag) {
739 j = i / sblock.fs_frag;
740 setblock(&sblock, cg_blksfree(&acg), j);
742 acg.cg_cs.cs_nbfree++;
746 * Handle the last new block if there are stll some new fragments left.
747 * Here we don't have to bother about the cluster summary or the even
748 * the rotational layout table.
750 if (i < (dmax - cbase)) {
751 acg.cg_frsum[dmax - cbase - i]++;
752 for (; i < dmax - cbase; i++) {
753 setbit(cg_blksfree(&acg), i);
754 acg.cg_cs.cs_nffree++;
758 sblock.fs_cstotal.cs_nffree +=
759 (acg.cg_cs.cs_nffree - aocg.cg_cs.cs_nffree);
760 sblock.fs_cstotal.cs_nbfree +=
761 (acg.cg_cs.cs_nbfree - aocg.cg_cs.cs_nbfree);
763 * The following statistics are not changed here:
764 * sblock.fs_cstotal.cs_ndir
765 * sblock.fs_cstotal.cs_nifree
766 * As the statistics for this cylinder group are ready, copy it to
767 * the summary information array.
772 * Write the updated "joining" cylinder group back to disk.
775 wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)), (size_t)sblock.fs_cgsize,
776 (void *)&acg, fso, Nflag);
777 DBG_PRINT0("jcg written\n");
778 DBG_DUMP_CG(&sblock, "new joining cg", &acg);
785 * Here we update the location of the cylinder summary. We have two possible
786 * ways of growing the cylinder summary:
787 * (1) We can try to grow the summary in the current location, and relocate
788 * possibly used blocks within the current cylinder group.
789 * (2) Alternatively we can relocate the whole cylinder summary to the first
790 * new completely empty cylinder group. Once the cylinder summary is no
791 * longer in the beginning of the first cylinder group you should never
792 * use a version of fsck which is not aware of the possibility to have
793 * this structure in a non standard place.
794 * Option (2) is considered to be less intrusive to the structure of the file-
795 * system, so that's the one being used.
798 updcsloc(time_t modtime, int fsi, int fso, unsigned int Nflag)
809 if (howmany(sblock.fs_cssize, sblock.fs_fsize) ==
810 howmany(osblock.fs_cssize, osblock.fs_fsize)) {
812 * No new fragment needed.
817 /* Adjust fs_dsize by added summary blocks */
818 sblock.fs_dsize -= howmany(sblock.fs_cssize, sblock.fs_fsize) -
819 howmany(osblock.fs_cssize, osblock.fs_fsize);
820 sblock.fs_old_dsize = sblock.fs_dsize;
821 ocscg = dtog(&osblock, osblock.fs_csaddr);
825 * Read original cylinder group from disk, and make a copy.
826 * XXX If Nflag is set in some very rare cases we now miss
827 * some changes done in updjcg by reading the unmodified
830 rdfs(fsbtodb(&osblock, cgtod(&osblock, ocscg)),
831 (size_t)osblock.fs_cgsize, (void *)&aocg, fsi);
832 DBG_PRINT0("oscg read\n");
833 DBG_DUMP_CG(&sblock, "old summary cg", &aocg);
835 memcpy((void *)&cgun1, (void *)&cgun2, sizeof(cgun2));
838 * Touch the cylinder group, set up local variables needed later
839 * and update the superblock.
841 acg.cg_time = modtime;
844 * XXX In the case of having active snapshots we may need much more
845 * blocks for the copy on write. We need each block twice, and
846 * also up to 8*3 blocks for indirect blocks for all possible
850 * There is not enough space in the old cylinder group to
851 * relocate all blocks as needed, so we relocate the whole
852 * cylinder group summary to a new group. We try to use the
853 * first complete new cylinder group just created. Within the
854 * cylinder group we align the area immediately after the
855 * cylinder group information location in order to be as
856 * close as possible to the original implementation of ffs.
858 * First we have to make sure we'll find enough space in the
859 * new cylinder group. If not, then we currently give up.
860 * We start with freeing everything which was used by the
861 * fragments of the old cylinder summary in the current group.
862 * Now we write back the group meta data, read in the needed
863 * meta data from the new cylinder group, and start allocating
864 * within that group. Here we can assume, the group to be
865 * completely empty. Which makes the handling of fragments and
866 * clusters a lot easier.
869 if (sblock.fs_ncg - osblock.fs_ncg < 2)
870 errx(2, "panic: not enough space");
873 * Point "d" to the first fragment not used by the cylinder
876 d = osblock.fs_csaddr + (osblock.fs_cssize / osblock.fs_fsize);
879 * Set up last cluster size ("lcs") already here. Calculate
880 * the size for the trailing cluster just behind where "d"
883 if (sblock.fs_contigsumsize > 0) {
884 for (block = howmany(d % sblock.fs_fpg, sblock.fs_frag),
885 lcs = 0; lcs < sblock.fs_contigsumsize; block++, lcs++) {
886 if (isclr(cg_clustersfree(&acg), block))
892 * Point "d" to the last frag used by the cylinder summary.
896 DBG_PRINT1("d=%jd\n", (intmax_t)d);
897 if ((d + 1) % sblock.fs_frag) {
899 * The end of the cylinder summary is not a complete
903 frag_adjust(d % sblock.fs_fpg, -1);
904 for (; (d + 1) % sblock.fs_frag; d--) {
905 DBG_PRINT1("d=%jd\n", (intmax_t)d);
906 setbit(cg_blksfree(&acg), d % sblock.fs_fpg);
907 acg.cg_cs.cs_nffree++;
908 sblock.fs_cstotal.cs_nffree++;
911 * Point "d" to the last fragment of the last
912 * (incomplete) block of the cylinder summary.
915 frag_adjust(d % sblock.fs_fpg, 1);
917 if (isblock(&sblock, cg_blksfree(&acg),
918 (d % sblock.fs_fpg) / sblock.fs_frag)) {
919 DBG_PRINT1("d=%jd\n", (intmax_t)d);
920 acg.cg_cs.cs_nffree -= sblock.fs_frag;
921 acg.cg_cs.cs_nbfree++;
922 sblock.fs_cstotal.cs_nffree -= sblock.fs_frag;
923 sblock.fs_cstotal.cs_nbfree++;
924 if (sblock.fs_contigsumsize > 0) {
925 setbit(cg_clustersfree(&acg),
926 (d % sblock.fs_fpg) / sblock.fs_frag);
927 if (lcs < sblock.fs_contigsumsize) {
929 cg_clustersum(&acg)[lcs]--;
931 cg_clustersum(&acg)[lcs]++;
936 * Point "d" to the first fragment of the block before
937 * the last incomplete block.
942 DBG_PRINT1("d=%jd\n", (intmax_t)d);
943 for (d = rounddown(d, sblock.fs_frag); d >= osblock.fs_csaddr;
944 d -= sblock.fs_frag) {
946 DBG_PRINT1("d=%jd\n", (intmax_t)d);
947 setblock(&sblock, cg_blksfree(&acg),
948 (d % sblock.fs_fpg) / sblock.fs_frag);
949 acg.cg_cs.cs_nbfree++;
950 sblock.fs_cstotal.cs_nbfree++;
951 if (sblock.fs_contigsumsize > 0) {
952 setbit(cg_clustersfree(&acg),
953 (d % sblock.fs_fpg) / sblock.fs_frag);
955 * The last cluster size is already set up.
957 if (lcs < sblock.fs_contigsumsize) {
959 cg_clustersum(&acg)[lcs]--;
961 cg_clustersum(&acg)[lcs]++;
968 * Now write the former cylinder group containing the cylinder
969 * summary back to disk.
972 wtfs(fsbtodb(&sblock, cgtod(&sblock, ocscg)),
973 (size_t)sblock.fs_cgsize, (void *)&acg, fso, Nflag);
974 DBG_PRINT0("oscg written\n");
975 DBG_DUMP_CG(&sblock, "old summary cg", &acg);
978 * Find the beginning of the new cylinder group containing the
981 sblock.fs_csaddr = cgdmin(&sblock, osblock.fs_ncg);
982 ncscg = dtog(&sblock, sblock.fs_csaddr);
986 * If Nflag is specified, we would now read random data instead
987 * of an empty cg structure from disk. So we can't simulate that
991 DBG_PRINT0("nscg update skipped\n");
997 * Read the future cylinder group containing the cylinder
998 * summary from disk, and make a copy.
1000 rdfs(fsbtodb(&sblock, cgtod(&sblock, ncscg)),
1001 (size_t)sblock.fs_cgsize, (void *)&aocg, fsi);
1002 DBG_PRINT0("nscg read\n");
1003 DBG_DUMP_CG(&sblock, "new summary cg", &aocg);
1005 memcpy((void *)&cgun1, (void *)&cgun2, sizeof(cgun2));
1008 * Allocate all complete blocks used by the new cylinder
1011 for (d = sblock.fs_csaddr; d + sblock.fs_frag <=
1012 sblock.fs_csaddr + (sblock.fs_cssize / sblock.fs_fsize);
1013 d += sblock.fs_frag) {
1014 clrblock(&sblock, cg_blksfree(&acg),
1015 (d % sblock.fs_fpg) / sblock.fs_frag);
1016 acg.cg_cs.cs_nbfree--;
1017 sblock.fs_cstotal.cs_nbfree--;
1018 if (sblock.fs_contigsumsize > 0) {
1019 clrbit(cg_clustersfree(&acg),
1020 (d % sblock.fs_fpg) / sblock.fs_frag);
1025 * Allocate all fragments used by the cylinder summary in the
1028 if (d < sblock.fs_csaddr + (sblock.fs_cssize / sblock.fs_fsize)) {
1029 for (; d - sblock.fs_csaddr <
1030 sblock.fs_cssize/sblock.fs_fsize; d++) {
1031 clrbit(cg_blksfree(&acg), d % sblock.fs_fpg);
1032 acg.cg_cs.cs_nffree--;
1033 sblock.fs_cstotal.cs_nffree--;
1035 acg.cg_cs.cs_nbfree--;
1036 acg.cg_cs.cs_nffree += sblock.fs_frag;
1037 sblock.fs_cstotal.cs_nbfree--;
1038 sblock.fs_cstotal.cs_nffree += sblock.fs_frag;
1039 if (sblock.fs_contigsumsize > 0)
1040 clrbit(cg_clustersfree(&acg),
1041 (d % sblock.fs_fpg) / sblock.fs_frag);
1043 frag_adjust(d % sblock.fs_fpg, 1);
1046 * XXX Handle the cluster statistics here in the case this
1047 * cylinder group is now almost full, and the remaining
1048 * space is less then the maximum cluster size. This is
1049 * probably not needed, as you would hardly find a file
1050 * system which has only MAXCSBUFS+FS_MAXCONTIG of free
1051 * space right behind the cylinder group information in
1052 * any new cylinder group.
1056 * Update our statistics in the cylinder summary.
1061 * Write the new cylinder group containing the cylinder summary
1065 wtfs(fsbtodb(&sblock, cgtod(&sblock, ncscg)),
1066 (size_t)sblock.fs_cgsize, (void *)&acg, fso, Nflag);
1067 DBG_PRINT0("nscg written\n");
1068 DBG_DUMP_CG(&sblock, "new summary cg", &acg);
1075 * Here we read some block(s) from disk.
1078 rdfs(ufs2_daddr_t bno, size_t size, void *bf, int fsi)
1086 err(32, "rdfs: attempting to read negative block number");
1087 if (lseek(fsi, (off_t)bno * DEV_BSIZE, 0) < 0)
1088 err(33, "rdfs: seek error: %jd", (intmax_t)bno);
1089 n = read(fsi, bf, size);
1090 if (n != (ssize_t)size)
1091 err(34, "rdfs: read error: %jd", (intmax_t)bno);
1098 * Here we write some block(s) to disk.
1101 wtfs(ufs2_daddr_t bno, size_t size, void *bf, int fso, unsigned int Nflag)
1112 if (lseek(fso, (off_t)bno * DEV_BSIZE, SEEK_SET) < 0)
1113 err(35, "wtfs: seek error: %ld", (long)bno);
1114 n = write(fso, bf, size);
1115 if (n != (ssize_t)size)
1116 err(36, "wtfs: write error: %ld", (long)bno);
1123 * Here we check if all frags of a block are free. For more details again
1124 * please see the source of newfs(8), as this function is taken over almost
1128 isblock(struct fs *fs, unsigned char *cp, int h)
1135 switch (fs->fs_frag) {
1138 return (cp[h] == 0xff);
1140 mask = 0x0f << ((h & 0x1) << 2);
1142 return ((cp[h >> 1] & mask) == mask);
1144 mask = 0x03 << ((h & 0x3) << 1);
1146 return ((cp[h >> 2] & mask) == mask);
1148 mask = 0x01 << (h & 0x7);
1150 return ((cp[h >> 3] & mask) == mask);
1152 fprintf(stderr, "isblock bad fs_frag %d\n", fs->fs_frag);
1159 * Here we allocate a complete block in the block map. For more details again
1160 * please see the source of newfs(8), as this function is taken over almost
1164 clrblock(struct fs *fs, unsigned char *cp, int h)
1166 DBG_FUNC("clrblock")
1170 switch ((fs)->fs_frag) {
1175 cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2));
1178 cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1));
1181 cp[h >> 3] &= ~(0x01 << (h & 0x7));
1184 warnx("clrblock bad fs_frag %d", fs->fs_frag);
1193 * Here we free a complete block in the free block map. For more details again
1194 * please see the source of newfs(8), as this function is taken over almost
1198 setblock(struct fs *fs, unsigned char *cp, int h)
1200 DBG_FUNC("setblock")
1204 switch (fs->fs_frag) {
1209 cp[h >> 1] |= (0x0f << ((h & 0x1) << 2));
1212 cp[h >> 2] |= (0x03 << ((h & 0x3) << 1));
1215 cp[h >> 3] |= (0x01 << (h & 0x7));
1218 warnx("setblock bad fs_frag %d", fs->fs_frag);
1227 * Figure out how many lines our current terminal has. For more details again
1228 * please see the source of newfs(8), as this function is taken over almost
1234 DBG_FUNC("charsperline")
1242 if (ioctl(0, TIOCGWINSZ, &ws) != -1)
1243 columns = ws.ws_col;
1244 if (columns == 0 && (cp = getenv("COLUMNS")))
1247 columns = 80; /* last resort */
1254 is_dev(const char *name)
1256 struct stat devstat;
1258 if (stat(name, &devstat) != 0)
1260 if (!S_ISCHR(devstat.st_mode))
1266 getdev(const char *name, struct statfs *statfsp)
1268 static char device[MAXPATHLEN];
1274 cp = strrchr(name, '/');
1276 snprintf(device, sizeof(device), "%s%s", _PATH_DEV, name);
1281 if (statfsp != NULL)
1282 return (statfsp->f_mntfromname);
1288 * growfs(8) is a utility which allows to increase the size of an existing
1289 * ufs file system. Currently this can only be done on unmounted file system.
1290 * It recognizes some command line options to specify the new desired size,
1291 * and it does some basic checkings. The old file system size is determined
1292 * and after some more checks like we can really access the new last block
1293 * on the disk etc. we calculate the new parameters for the superblock. After
1294 * having done this we just call growfs() which will do the work.
1295 * We still have to provide support for snapshots. Therefore we first have to
1296 * understand what data structures are always replicated in the snapshot on
1297 * creation, for all other blocks we touch during our procedure, we have to
1298 * keep the old blocks unchanged somewhere available for the snapshots. If we
1299 * are lucky, then we only have to handle our blocks to be relocated in that
1301 * Also we have to consider in what order we actually update the critical
1302 * data structures of the file system to make sure, that in case of a disaster
1303 * fsck(8) is still able to restore any lost data.
1304 * The foreseen last step then will be to provide for growing even mounted
1305 * file systems. There we have to extend the mount() system call to provide
1306 * userland access to the file system locking facility.
1309 main(int argc, char **argv)
1314 struct statfs *statfsp;
1317 int error, j, fsi, fso, ch, ret, Nflag = 0, yflag = 0;
1318 char *p, reply[5], oldsizebuf[6], newsizebuf[6];
1323 while ((ch = getopt(argc, argv, "Ns:vy")) != -1) {
1329 size = (off_t)strtoumax(optarg, &p, 0);
1330 if (p == NULL || *p == '\0')
1332 else if (*p == 'b' || *p == 'B')
1334 else if (*p == 'k' || *p == 'K')
1336 else if (*p == 'm' || *p == 'M')
1338 else if (*p == 'g' || *p == 'G')
1340 else if (*p == 't' || *p == 'T') {
1344 errx(1, "unknown suffix on -s argument");
1346 case 'v': /* for compatibility to newfs */
1364 * Now try to guess the device name.
1366 statfsp = getmntpoint(*argv);
1367 device = getdev(*argv, statfsp);
1369 errx(1, "cannot find special device for %s", *argv);
1371 fsi = open(device, O_RDONLY);
1373 err(1, "%s", device);
1376 * Try to guess the slice size if not specified.
1378 if (ioctl(fsi, DIOCGMEDIASIZE, &mediasize) == -1)
1379 err(1,"DIOCGMEDIASIZE");
1382 * Check if that partition is suitable for growing a file system.
1385 errx(1, "partition is unavailable");
1388 * Read the current superblock, and take a backup.
1390 if ((ret = sbget(fsi, &fs, UFS_STDSB, 0)) != 0) {
1393 errx(1, "superblock not recognized");
1395 errc(1, ret, "unable to read superblock");
1399 * Check for filesystem that was unclean at mount time.
1401 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) != 0)
1402 errx(1, "%s is not clean - run fsck.\n", *argv);
1403 memcpy(&osblock, fs, fs->fs_sbsize);
1405 memcpy((void *)&fsun1, (void *)&fsun2, osblock.fs_sbsize);
1407 DBG_OPEN("/tmp/growfs.debug"); /* already here we need a superblock */
1408 DBG_DUMP_FS(&sblock, "old sblock");
1411 * Determine size to grow to. Default to the device size.
1416 if (size > (uint64_t)mediasize) {
1417 humanize_number(oldsizebuf, sizeof(oldsizebuf), size,
1418 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1419 humanize_number(newsizebuf, sizeof(newsizebuf),
1421 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1423 errx(1, "requested size %s is larger "
1424 "than the available %s", oldsizebuf, newsizebuf);
1429 * Make sure the new size is a multiple of fs_fsize; /dev/ufssuspend
1430 * only supports fragment-aligned IO requests.
1432 size -= size % osblock.fs_fsize;
1434 if (size <= (uint64_t)(osblock.fs_size * osblock.fs_fsize)) {
1435 humanize_number(oldsizebuf, sizeof(oldsizebuf),
1436 osblock.fs_size * osblock.fs_fsize,
1437 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1438 humanize_number(newsizebuf, sizeof(newsizebuf), size,
1439 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1441 if (size == (uint64_t)(osblock.fs_size * osblock.fs_fsize))
1442 errx(0, "requested size %s is equal to the current "
1443 "filesystem size %s", newsizebuf, oldsizebuf);
1444 errx(1, "requested size %s is smaller than the current "
1445 "filesystem size %s", newsizebuf, oldsizebuf);
1448 sblock.fs_old_size = sblock.fs_size =
1449 dbtofsb(&osblock, size / DEV_BSIZE);
1450 sblock.fs_providersize = dbtofsb(&osblock, mediasize / DEV_BSIZE);
1453 * Are we really growing?
1455 if (osblock.fs_size >= sblock.fs_size) {
1456 errx(1, "we are not growing (%jd->%jd)",
1457 (intmax_t)osblock.fs_size, (intmax_t)sblock.fs_size);
1461 * Check if we find an active snapshot.
1464 for (j = 0; j < FSMAXSNAP; j++) {
1465 if (sblock.fs_snapinum[j]) {
1466 errx(1, "active snapshot found in file system; "
1467 "please remove all snapshots before "
1470 if (!sblock.fs_snapinum[j]) /* list is dense */
1475 if (yflag == 0 && Nflag == 0) {
1476 if (statfsp != NULL && (statfsp->f_flags & MNT_RDONLY) == 0)
1477 printf("Device is mounted read-write; resizing will "
1478 "result in temporary write suspension for %s.\n",
1479 statfsp->f_mntonname);
1480 printf("It's strongly recommended to make a backup "
1481 "before growing the file system.\n"
1482 "OK to grow filesystem on %s", device);
1483 if (statfsp != NULL)
1484 printf(", mounted on %s,", statfsp->f_mntonname);
1485 humanize_number(oldsizebuf, sizeof(oldsizebuf),
1486 osblock.fs_size * osblock.fs_fsize,
1487 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1488 humanize_number(newsizebuf, sizeof(newsizebuf),
1489 sblock.fs_size * sblock.fs_fsize,
1490 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1491 printf(" from %s to %s? [yes/no] ", oldsizebuf, newsizebuf);
1493 fgets(reply, (int)sizeof(reply), stdin);
1494 if (strcasecmp(reply, "yes\n")){
1495 printf("Response other than \"yes\"; aborting\n");
1501 * Try to access our device for writing. If it's not mounted,
1502 * or mounted read-only, simply open it; otherwise, use UFS
1503 * suspension mechanism.
1508 if (statfsp != NULL && (statfsp->f_flags & MNT_RDONLY) == 0) {
1509 fso = open(_PATH_UFSSUSPEND, O_RDWR);
1511 err(1, "unable to open %s", _PATH_UFSSUSPEND);
1512 error = ioctl(fso, UFSSUSPEND, &statfsp->f_fsid);
1514 err(1, "UFSSUSPEND");
1516 fso = open(device, O_WRONLY);
1518 err(1, "%s", device);
1523 * Try to access our new last block in the file system.
1525 testbuf = malloc(sblock.fs_fsize);
1526 if (testbuf == NULL)
1528 rdfs((ufs2_daddr_t)((size - sblock.fs_fsize) / DEV_BSIZE),
1529 sblock.fs_fsize, testbuf, fsi);
1530 wtfs((ufs2_daddr_t)((size - sblock.fs_fsize) / DEV_BSIZE),
1531 sblock.fs_fsize, testbuf, fso, Nflag);
1535 * Now calculate new superblock values and check for reasonable
1536 * bound for new file system size:
1537 * fs_size: is derived from user input
1538 * fs_dsize: should get updated in the routines creating or
1539 * updating the cylinder groups on the fly
1540 * fs_cstotal: should get updated in the routines creating or
1541 * updating the cylinder groups
1545 * Update the number of cylinders and cylinder groups in the file system.
1547 if (sblock.fs_magic == FS_UFS1_MAGIC) {
1548 sblock.fs_old_ncyl =
1549 sblock.fs_size * sblock.fs_old_nspf / sblock.fs_old_spc;
1550 if (sblock.fs_size * sblock.fs_old_nspf >
1551 sblock.fs_old_ncyl * sblock.fs_old_spc)
1552 sblock.fs_old_ncyl++;
1554 sblock.fs_ncg = howmany(sblock.fs_size, sblock.fs_fpg);
1557 * Allocate last cylinder group only if there is enough room
1558 * for at least one data block.
1560 if (sblock.fs_size % sblock.fs_fpg != 0 &&
1561 sblock.fs_size <= cgdmin(&sblock, sblock.fs_ncg - 1)) {
1562 humanize_number(oldsizebuf, sizeof(oldsizebuf),
1563 (sblock.fs_size % sblock.fs_fpg) * sblock.fs_fsize,
1564 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1565 warnx("no room to allocate last cylinder group; "
1566 "leaving %s unused", oldsizebuf);
1568 if (sblock.fs_magic == FS_UFS1_MAGIC)
1569 sblock.fs_old_ncyl = sblock.fs_ncg * sblock.fs_old_cpg;
1570 sblock.fs_old_size = sblock.fs_size =
1571 sblock.fs_ncg * sblock.fs_fpg;
1575 * Update the space for the cylinder group summary information in the
1576 * respective cylinder group data area.
1579 fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum));
1581 if (osblock.fs_size >= sblock.fs_size)
1582 errx(1, "not enough new space");
1584 DBG_PRINT0("sblock calculated\n");
1587 * Ok, everything prepared, so now let's do the tricks.
1589 growfs(fsi, fso, Nflag);
1593 if (statfsp != NULL && (statfsp->f_flags & MNT_RDONLY) == 0) {
1594 error = ioctl(fso, UFSRESUME);
1596 err(1, "UFSRESUME");
1601 if (statfsp != NULL && (statfsp->f_flags & MNT_RDONLY) != 0 &&
1602 chkdoreload(statfsp, warn) != 0)
1613 * Dump a line of usage.
1622 fprintf(stderr, "usage: growfs [-Ny] [-s size] special | filesystem\n");
1629 * This updates most parameters and the bitmap related to cluster. We have to
1630 * assume that sblock, osblock, acg are set up.
1640 if (sblock.fs_contigsumsize < 1) /* no clustering */
1643 * update cluster allocation map
1645 setbit(cg_clustersfree(&acg), block);
1648 * update cluster summary table
1652 * calculate size for the trailing cluster
1654 for (block--; lcs < sblock.fs_contigsumsize; block--, lcs++ ) {
1655 if (isclr(cg_clustersfree(&acg), block))
1659 if (lcs < sblock.fs_contigsumsize) {
1661 cg_clustersum(&acg)[lcs]--;
1663 cg_clustersum(&acg)[lcs]++;
1671 * Calculate the check-hash of the cylinder group.
1674 cgckhash(struct cg *cgp)
1677 if ((sblock.fs_metackhash & CK_CYLGRP) == 0)
1680 cgp->cg_ckhash = calculate_crc32c(~0L, (void *)cgp, sblock.fs_cgsize);