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 mount_reload(const struct statfs *stfs);
122 static void cgckhash(struct cg *);
125 * Here we actually start growing the file system. We basically read the
126 * cylinder summary from the first cylinder group as we want to update
127 * this on the fly during our various operations. First we handle the
128 * changes in the former last cylinder group. Afterwards we create all new
129 * cylinder groups. Now we handle the cylinder group containing the
130 * cylinder summary which might result in a relocation of the whole
131 * structure. In the end we write back the updated cylinder summary, the
132 * new superblock, and slightly patched versions of the super block
136 growfs(int fsi, int fso, unsigned int Nflag)
149 * Get the cylinder summary into the memory.
151 fscs = (struct csum *)calloc((size_t)1, (size_t)sblock.fs_cssize);
153 errx(1, "calloc failed");
154 memcpy(fscs, osblock.fs_csp, osblock.fs_cssize);
155 free(osblock.fs_csp);
156 osblock.fs_csp = NULL;
157 sblock.fs_csp = fscs;
161 struct csum *dbg_csp;
167 for (dbg_csc = 0; dbg_csc < osblock.fs_ncg; dbg_csc++) {
168 snprintf(dbg_line, sizeof(dbg_line),
169 "%d. old csum in old location", dbg_csc);
170 DBG_DUMP_CSUM(&osblock, dbg_line, dbg_csp++);
173 #endif /* FS_DEBUG */
174 DBG_PRINT0("fscs read\n");
177 * Do all needed changes in the former last cylinder group.
179 updjcg(osblock.fs_ncg - 1, modtime, fsi, fso, Nflag);
182 * Dump out summary information about file system.
185 #define B2MBFACTOR (1 / (1024.0 * 1024.0))
186 printf("growfs: %.1fMB (%jd sectors) block size %d, fragment size %d\n",
187 (float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR,
188 (intmax_t)fsbtodb(&sblock, sblock.fs_size), sblock.fs_bsize,
190 printf("\tusing %d cylinder groups of %.2fMB, %d blks, %d inodes.\n",
191 sblock.fs_ncg, (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR,
192 sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg);
193 if (sblock.fs_flags & FS_DOSOFTDEP)
194 printf("\twith soft updates\n");
196 #endif /* FS_DEBUG */
199 * Now build the cylinders group blocks and
200 * then print out indices of cylinder groups.
202 printf("super-block backups (for fsck_ffs -b #) at:\n");
204 width = charsperline();
207 * Iterate for only the new cylinder groups.
209 for (cylno = osblock.fs_ncg; cylno < sblock.fs_ncg; cylno++) {
210 initcg(cylno, modtime, fso, Nflag);
211 j = sprintf(tmpbuf, " %jd%s",
212 (intmax_t)fsbtodb(&sblock, cgsblock(&sblock, cylno)),
213 cylno < (sblock.fs_ncg - 1) ? "," : "" );
214 if (i + j >= width) {
219 printf("%s", tmpbuf);
225 * Do all needed changes in the first cylinder group.
226 * allocate blocks in new location
228 updcsloc(modtime, fsi, fso, Nflag);
231 * Clean up the dynamic fields in our superblock.
234 * The following fields are currently distributed from the superblock
244 * We probably should rather change the summary for the cylinder group
245 * statistics here to the value of what would be in there, if the file
246 * system were created initially with the new size. Therefor we still
247 * need to find an easy way of calculating that.
248 * Possibly we can try to read the first superblock copy and apply the
249 * "diffed" stats between the old and new superblock by still copying
250 * certain parameters onto that.
252 sblock.fs_time = modtime;
256 sblock.fs_cgrotor = 0;
258 memset((void *)&sblock.fs_fsmnt, 0, sizeof(sblock.fs_fsmnt));
261 * Now write the new superblock, its summary information,
262 * and all the alternates back to disk.
264 if (!Nflag && sbput(fso, &sblock, sblock.fs_ncg) != 0)
265 errc(2, EIO, "could not write updated superblock");
266 DBG_PRINT0("fscs written\n");
270 struct csum *dbg_csp;
275 for (dbg_csc = 0; dbg_csc < sblock.fs_ncg; dbg_csc++) {
276 snprintf(dbg_line, sizeof(dbg_line),
277 "%d. new csum in new location", dbg_csc);
278 DBG_DUMP_CSUM(&sblock, dbg_line, dbg_csp++);
281 #endif /* FS_DEBUG */
283 DBG_PRINT0("sblock written\n");
284 DBG_DUMP_FS(&sblock, "new initial sblock");
286 DBG_PRINT0("sblock copies written\n");
287 DBG_DUMP_FS(&sblock, "new other sblocks");
294 * This creates a new cylinder group structure, for more details please see
295 * the source of newfs(8), as this function is taken over almost unchanged.
296 * As this is never called for the first cylinder group, the special
297 * provisions for that case are removed here.
300 initcg(int cylno, time_t modtime, int fso, unsigned int Nflag)
303 static caddr_t iobuf;
306 ufs2_daddr_t i, cbase, dmax;
307 struct ufs1_dinode *dp1;
309 uint j, d, dupper, dlower;
311 if (iobuf == NULL && (iobuf = malloc(sblock.fs_bsize * 3)) == NULL)
312 errx(37, "panic: cannot allocate I/O buffer");
315 * Determine block bounds for cylinder group.
316 * Allow space for super block summary information in first
319 cbase = cgbase(&sblock, cylno);
320 dmax = cbase + sblock.fs_fpg;
321 if (dmax > sblock.fs_size)
322 dmax = sblock.fs_size;
323 dlower = cgsblock(&sblock, cylno) - cbase;
324 dupper = cgdmin(&sblock, cylno) - cbase;
325 if (cylno == 0) /* XXX fscs may be relocated */
326 dupper += howmany(sblock.fs_cssize, sblock.fs_fsize);
328 memset(&acg, 0, sblock.fs_cgsize);
329 acg.cg_time = modtime;
330 acg.cg_magic = CG_MAGIC;
332 acg.cg_niblk = sblock.fs_ipg;
333 acg.cg_initediblk = MIN(sblock.fs_ipg, 2 * INOPB(&sblock));
334 acg.cg_ndblk = dmax - cbase;
335 if (sblock.fs_contigsumsize > 0)
336 acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag;
337 start = &acg.cg_space[0] - (u_char *)(&acg.cg_firstfield);
338 if (sblock.fs_magic == FS_UFS2_MAGIC) {
339 acg.cg_iusedoff = start;
341 acg.cg_old_ncyl = sblock.fs_old_cpg;
342 acg.cg_old_time = acg.cg_time;
344 acg.cg_old_niblk = acg.cg_niblk;
346 acg.cg_initediblk = 0;
347 acg.cg_old_btotoff = start;
348 acg.cg_old_boff = acg.cg_old_btotoff +
349 sblock.fs_old_cpg * sizeof(int32_t);
350 acg.cg_iusedoff = acg.cg_old_boff +
351 sblock.fs_old_cpg * sizeof(u_int16_t);
353 acg.cg_freeoff = acg.cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT);
354 acg.cg_nextfreeoff = acg.cg_freeoff + howmany(sblock.fs_fpg, CHAR_BIT);
355 if (sblock.fs_contigsumsize > 0) {
356 acg.cg_clustersumoff =
357 roundup(acg.cg_nextfreeoff, sizeof(u_int32_t));
358 acg.cg_clustersumoff -= sizeof(u_int32_t);
359 acg.cg_clusteroff = acg.cg_clustersumoff +
360 (sblock.fs_contigsumsize + 1) * sizeof(u_int32_t);
361 acg.cg_nextfreeoff = acg.cg_clusteroff +
362 howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT);
364 if (acg.cg_nextfreeoff > (unsigned)sblock.fs_cgsize) {
366 * This should never happen as we would have had that panic
367 * already on file system creation
369 errx(37, "panic: cylinder group too big");
371 acg.cg_cs.cs_nifree += sblock.fs_ipg;
373 for (ino = 0; ino < UFS_ROOTINO; ino++) {
374 setbit(cg_inosused(&acg), ino);
375 acg.cg_cs.cs_nifree--;
378 * For the old file system, we have to initialize all the inodes.
380 if (sblock.fs_magic == FS_UFS1_MAGIC) {
381 bzero(iobuf, sblock.fs_bsize);
382 for (i = 0; i < sblock.fs_ipg / INOPF(&sblock);
383 i += sblock.fs_frag) {
384 dp1 = (struct ufs1_dinode *)(void *)iobuf;
385 for (j = 0; j < INOPB(&sblock); j++) {
386 dp1->di_gen = arc4random();
389 wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno) + i),
390 sblock.fs_bsize, iobuf, fso, Nflag);
395 * In cylno 0, beginning space is reserved
396 * for boot and super blocks.
398 for (d = 0; d < dlower; d += sblock.fs_frag) {
399 blkno = d / sblock.fs_frag;
400 setblock(&sblock, cg_blksfree(&acg), blkno);
401 if (sblock.fs_contigsumsize > 0)
402 setbit(cg_clustersfree(&acg), blkno);
403 acg.cg_cs.cs_nbfree++;
405 sblock.fs_dsize += dlower;
407 sblock.fs_dsize += acg.cg_ndblk - dupper;
408 if ((i = dupper % sblock.fs_frag)) {
409 acg.cg_frsum[sblock.fs_frag - i]++;
410 for (d = dupper + sblock.fs_frag - i; dupper < d; dupper++) {
411 setbit(cg_blksfree(&acg), dupper);
412 acg.cg_cs.cs_nffree++;
415 for (d = dupper; d + sblock.fs_frag <= acg.cg_ndblk;
416 d += sblock.fs_frag) {
417 blkno = d / sblock.fs_frag;
418 setblock(&sblock, cg_blksfree(&acg), blkno);
419 if (sblock.fs_contigsumsize > 0)
420 setbit(cg_clustersfree(&acg), blkno);
421 acg.cg_cs.cs_nbfree++;
423 if (d < acg.cg_ndblk) {
424 acg.cg_frsum[acg.cg_ndblk - d]++;
425 for (; d < acg.cg_ndblk; d++) {
426 setbit(cg_blksfree(&acg), d);
427 acg.cg_cs.cs_nffree++;
430 if (sblock.fs_contigsumsize > 0) {
431 int32_t *sump = cg_clustersum(&acg);
432 u_char *mapp = cg_clustersfree(&acg);
437 for (i = 0; i < acg.cg_nclusterblks; i++) {
438 if ((map & bit) != 0)
441 if (run > sblock.fs_contigsumsize)
442 run = sblock.fs_contigsumsize;
446 if ((i & (CHAR_BIT - 1)) != CHAR_BIT - 1)
454 if (run > sblock.fs_contigsumsize)
455 run = sblock.fs_contigsumsize;
459 sblock.fs_cstotal.cs_ndir += acg.cg_cs.cs_ndir;
460 sblock.fs_cstotal.cs_nffree += acg.cg_cs.cs_nffree;
461 sblock.fs_cstotal.cs_nbfree += acg.cg_cs.cs_nbfree;
462 sblock.fs_cstotal.cs_nifree += acg.cg_cs.cs_nifree;
466 memcpy(iobuf, &acg, sblock.fs_cgsize);
467 memset(iobuf + sblock.fs_cgsize, '\0',
468 sblock.fs_bsize * 3 - sblock.fs_cgsize);
470 wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)),
471 sblock.fs_bsize * 3, iobuf, fso, Nflag);
472 DBG_DUMP_CG(&sblock, "new cg", &acg);
479 * Here we add or subtract (sign +1/-1) the available fragments in a given
480 * block to or from the fragment statistics. By subtracting before and adding
481 * after an operation on the free frag map we can easy update the fragment
482 * statistic, which seems to be otherwise a rather complex operation.
485 frag_adjust(ufs2_daddr_t frag, int sign)
487 DBG_FUNC("frag_adjust")
495 * Here frag only needs to point to any fragment in the block we want
498 for (f = rounddown(frag, sblock.fs_frag);
499 f < roundup(frag + 1, sblock.fs_frag); f++) {
501 * Count contiguous free fragments.
503 if (isset(cg_blksfree(&acg), f)) {
506 if (fragsize && fragsize < sblock.fs_frag) {
508 * We found something in between.
510 acg.cg_frsum[fragsize] += sign;
511 DBG_PRINT2("frag_adjust [%d]+=%d\n",
517 if (fragsize && fragsize < sblock.fs_frag) {
519 * We found something.
521 acg.cg_frsum[fragsize] += sign;
522 DBG_PRINT2("frag_adjust [%d]+=%d\n", fragsize, sign);
524 DBG_PRINT2("frag_adjust [[%d]]+=%d\n", fragsize, sign);
531 * Here we do all needed work for the former last cylinder group. It has to be
532 * changed in any case, even if the file system ended exactly on the end of
533 * this group, as there is some slightly inconsistent handling of the number
534 * of cylinders in the cylinder group. We start again by reading the cylinder
535 * group from disk. If the last block was not fully available, we first handle
536 * the missing fragments, then we handle all new full blocks in that file
537 * system and finally we handle the new last fragmented block in the file
538 * system. We again have to handle the fragment statistics rotational layout
539 * tables and cluster summary during all those operations.
542 updjcg(int cylno, time_t modtime, int fsi, int fso, unsigned int Nflag)
545 ufs2_daddr_t cbase, dmax, dupper;
553 * Read the former last (joining) cylinder group from disk, and make
556 rdfs(fsbtodb(&osblock, cgtod(&osblock, cylno)),
557 (size_t)osblock.fs_cgsize, (void *)&aocg, fsi);
558 DBG_PRINT0("jcg read\n");
559 DBG_DUMP_CG(&sblock, "old joining cg", &aocg);
561 memcpy((void *)&cgun1, (void *)&cgun2, sizeof(cgun2));
564 * If the cylinder group had already its new final size almost
565 * nothing is to be done ... except:
566 * For some reason the value of cg_ncyl in the last cylinder group has
567 * to be zero instead of fs_cpg. As this is now no longer the last
568 * cylinder group we have to change that value now to fs_cpg.
571 if (cgbase(&osblock, cylno + 1) == osblock.fs_size) {
572 if (sblock.fs_magic == FS_UFS1_MAGIC)
573 acg.cg_old_ncyl = sblock.fs_old_cpg;
576 wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)),
577 (size_t)sblock.fs_cgsize, (void *)&acg, fso, Nflag);
578 DBG_PRINT0("jcg written\n");
579 DBG_DUMP_CG(&sblock, "new joining cg", &acg);
586 * Set up some variables needed later.
588 cbase = cgbase(&sblock, cylno);
589 dmax = cbase + sblock.fs_fpg;
590 if (dmax > sblock.fs_size)
591 dmax = sblock.fs_size;
592 dupper = cgdmin(&sblock, cylno) - cbase;
593 if (cylno == 0) /* XXX fscs may be relocated */
594 dupper += howmany(sblock.fs_cssize, sblock.fs_fsize);
597 * Set pointer to the cylinder summary for our cylinder group.
602 * Touch the cylinder group, update all fields in the cylinder group as
603 * needed, update the free space in the superblock.
605 acg.cg_time = modtime;
606 if ((unsigned)cylno == sblock.fs_ncg - 1) {
608 * This is still the last cylinder group.
610 if (sblock.fs_magic == FS_UFS1_MAGIC)
612 sblock.fs_old_ncyl % sblock.fs_old_cpg;
614 acg.cg_old_ncyl = sblock.fs_old_cpg;
616 DBG_PRINT2("jcg dbg: %d %u", cylno, sblock.fs_ncg);
618 if (sblock.fs_magic == FS_UFS1_MAGIC)
619 DBG_PRINT2("%d %u", acg.cg_old_ncyl, sblock.fs_old_cpg);
622 acg.cg_ndblk = dmax - cbase;
623 sblock.fs_dsize += acg.cg_ndblk - aocg.cg_ndblk;
624 if (sblock.fs_contigsumsize > 0)
625 acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag;
628 * Now we have to update the free fragment bitmap for our new free
629 * space. There again we have to handle the fragmentation and also
630 * the rotational layout tables and the cluster summary. This is
631 * also done per fragment for the first new block if the old file
632 * system end was not on a block boundary, per fragment for the new
633 * last block if the new file system end is not on a block boundary,
634 * and per block for all space in between.
636 * Handle the first new block here if it was partially available
639 if (osblock.fs_size % sblock.fs_frag) {
640 if (roundup(osblock.fs_size, sblock.fs_frag) <=
643 * The new space is enough to fill at least this
647 for (i = roundup(osblock.fs_size - cbase,
648 sblock.fs_frag) - 1; i >= osblock.fs_size - cbase;
650 setbit(cg_blksfree(&acg), i);
651 acg.cg_cs.cs_nffree++;
656 * Check if the fragment just created could join an
657 * already existing fragment at the former end of the
660 if (isblock(&sblock, cg_blksfree(&acg),
661 ((osblock.fs_size - cgbase(&sblock, cylno)) /
664 * The block is now completely available.
666 DBG_PRINT0("block was\n");
667 acg.cg_frsum[osblock.fs_size % sblock.fs_frag]--;
668 acg.cg_cs.cs_nbfree++;
669 acg.cg_cs.cs_nffree -= sblock.fs_frag;
670 k = rounddown(osblock.fs_size - cbase,
672 updclst((osblock.fs_size - cbase) /
676 * Lets rejoin a possible partially growed
680 while (isset(cg_blksfree(&acg), i) &&
681 (i >= rounddown(osblock.fs_size - cbase,
688 acg.cg_frsum[k + j]++;
692 * We only grow by some fragments within this last
695 for (i = sblock.fs_size - cbase - 1;
696 i >= osblock.fs_size - cbase; i--) {
697 setbit(cg_blksfree(&acg), i);
698 acg.cg_cs.cs_nffree++;
702 * Lets rejoin a possible partially growed fragment.
705 while (isset(cg_blksfree(&acg), i) &&
706 (i >= rounddown(osblock.fs_size - cbase,
713 acg.cg_frsum[k + j]++;
718 * Handle all new complete blocks here.
720 for (i = roundup(osblock.fs_size - cbase, sblock.fs_frag);
721 i + sblock.fs_frag <= dmax - cbase; /* XXX <= or only < ? */
722 i += sblock.fs_frag) {
723 j = i / sblock.fs_frag;
724 setblock(&sblock, cg_blksfree(&acg), j);
726 acg.cg_cs.cs_nbfree++;
730 * Handle the last new block if there are stll some new fragments left.
731 * Here we don't have to bother about the cluster summary or the even
732 * the rotational layout table.
734 if (i < (dmax - cbase)) {
735 acg.cg_frsum[dmax - cbase - i]++;
736 for (; i < dmax - cbase; i++) {
737 setbit(cg_blksfree(&acg), i);
738 acg.cg_cs.cs_nffree++;
742 sblock.fs_cstotal.cs_nffree +=
743 (acg.cg_cs.cs_nffree - aocg.cg_cs.cs_nffree);
744 sblock.fs_cstotal.cs_nbfree +=
745 (acg.cg_cs.cs_nbfree - aocg.cg_cs.cs_nbfree);
747 * The following statistics are not changed here:
748 * sblock.fs_cstotal.cs_ndir
749 * sblock.fs_cstotal.cs_nifree
750 * As the statistics for this cylinder group are ready, copy it to
751 * the summary information array.
756 * Write the updated "joining" cylinder group back to disk.
759 wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)), (size_t)sblock.fs_cgsize,
760 (void *)&acg, fso, Nflag);
761 DBG_PRINT0("jcg written\n");
762 DBG_DUMP_CG(&sblock, "new joining cg", &acg);
769 * Here we update the location of the cylinder summary. We have two possible
770 * ways of growing the cylinder summary:
771 * (1) We can try to grow the summary in the current location, and relocate
772 * possibly used blocks within the current cylinder group.
773 * (2) Alternatively we can relocate the whole cylinder summary to the first
774 * new completely empty cylinder group. Once the cylinder summary is no
775 * longer in the beginning of the first cylinder group you should never
776 * use a version of fsck which is not aware of the possibility to have
777 * this structure in a non standard place.
778 * Option (2) is considered to be less intrusive to the structure of the file-
779 * system, so that's the one being used.
782 updcsloc(time_t modtime, int fsi, int fso, unsigned int Nflag)
793 if (howmany(sblock.fs_cssize, sblock.fs_fsize) ==
794 howmany(osblock.fs_cssize, osblock.fs_fsize)) {
796 * No new fragment needed.
801 ocscg = dtog(&osblock, osblock.fs_csaddr);
805 * Read original cylinder group from disk, and make a copy.
806 * XXX If Nflag is set in some very rare cases we now miss
807 * some changes done in updjcg by reading the unmodified
810 rdfs(fsbtodb(&osblock, cgtod(&osblock, ocscg)),
811 (size_t)osblock.fs_cgsize, (void *)&aocg, fsi);
812 DBG_PRINT0("oscg read\n");
813 DBG_DUMP_CG(&sblock, "old summary cg", &aocg);
815 memcpy((void *)&cgun1, (void *)&cgun2, sizeof(cgun2));
818 * Touch the cylinder group, set up local variables needed later
819 * and update the superblock.
821 acg.cg_time = modtime;
824 * XXX In the case of having active snapshots we may need much more
825 * blocks for the copy on write. We need each block twice, and
826 * also up to 8*3 blocks for indirect blocks for all possible
830 * There is not enough space in the old cylinder group to
831 * relocate all blocks as needed, so we relocate the whole
832 * cylinder group summary to a new group. We try to use the
833 * first complete new cylinder group just created. Within the
834 * cylinder group we align the area immediately after the
835 * cylinder group information location in order to be as
836 * close as possible to the original implementation of ffs.
838 * First we have to make sure we'll find enough space in the
839 * new cylinder group. If not, then we currently give up.
840 * We start with freeing everything which was used by the
841 * fragments of the old cylinder summary in the current group.
842 * Now we write back the group meta data, read in the needed
843 * meta data from the new cylinder group, and start allocating
844 * within that group. Here we can assume, the group to be
845 * completely empty. Which makes the handling of fragments and
846 * clusters a lot easier.
849 if (sblock.fs_ncg - osblock.fs_ncg < 2)
850 errx(2, "panic: not enough space");
853 * Point "d" to the first fragment not used by the cylinder
856 d = osblock.fs_csaddr + (osblock.fs_cssize / osblock.fs_fsize);
859 * Set up last cluster size ("lcs") already here. Calculate
860 * the size for the trailing cluster just behind where "d"
863 if (sblock.fs_contigsumsize > 0) {
864 for (block = howmany(d % sblock.fs_fpg, sblock.fs_frag),
865 lcs = 0; lcs < sblock.fs_contigsumsize; block++, lcs++) {
866 if (isclr(cg_clustersfree(&acg), block))
872 * Point "d" to the last frag used by the cylinder summary.
876 DBG_PRINT1("d=%jd\n", (intmax_t)d);
877 if ((d + 1) % sblock.fs_frag) {
879 * The end of the cylinder summary is not a complete
883 frag_adjust(d % sblock.fs_fpg, -1);
884 for (; (d + 1) % sblock.fs_frag; d--) {
885 DBG_PRINT1("d=%jd\n", (intmax_t)d);
886 setbit(cg_blksfree(&acg), d % sblock.fs_fpg);
887 acg.cg_cs.cs_nffree++;
888 sblock.fs_cstotal.cs_nffree++;
891 * Point "d" to the last fragment of the last
892 * (incomplete) block of the cylinder summary.
895 frag_adjust(d % sblock.fs_fpg, 1);
897 if (isblock(&sblock, cg_blksfree(&acg),
898 (d % sblock.fs_fpg) / sblock.fs_frag)) {
899 DBG_PRINT1("d=%jd\n", (intmax_t)d);
900 acg.cg_cs.cs_nffree -= sblock.fs_frag;
901 acg.cg_cs.cs_nbfree++;
902 sblock.fs_cstotal.cs_nffree -= sblock.fs_frag;
903 sblock.fs_cstotal.cs_nbfree++;
904 if (sblock.fs_contigsumsize > 0) {
905 setbit(cg_clustersfree(&acg),
906 (d % sblock.fs_fpg) / sblock.fs_frag);
907 if (lcs < sblock.fs_contigsumsize) {
909 cg_clustersum(&acg)[lcs]--;
911 cg_clustersum(&acg)[lcs]++;
916 * Point "d" to the first fragment of the block before
917 * the last incomplete block.
922 DBG_PRINT1("d=%jd\n", (intmax_t)d);
923 for (d = rounddown(d, sblock.fs_frag); d >= osblock.fs_csaddr;
924 d -= sblock.fs_frag) {
926 DBG_PRINT1("d=%jd\n", (intmax_t)d);
927 setblock(&sblock, cg_blksfree(&acg),
928 (d % sblock.fs_fpg) / sblock.fs_frag);
929 acg.cg_cs.cs_nbfree++;
930 sblock.fs_cstotal.cs_nbfree++;
931 if (sblock.fs_contigsumsize > 0) {
932 setbit(cg_clustersfree(&acg),
933 (d % sblock.fs_fpg) / sblock.fs_frag);
935 * The last cluster size is already set up.
937 if (lcs < sblock.fs_contigsumsize) {
939 cg_clustersum(&acg)[lcs]--;
941 cg_clustersum(&acg)[lcs]++;
948 * Now write the former cylinder group containing the cylinder
949 * summary back to disk.
952 wtfs(fsbtodb(&sblock, cgtod(&sblock, ocscg)),
953 (size_t)sblock.fs_cgsize, (void *)&acg, fso, Nflag);
954 DBG_PRINT0("oscg written\n");
955 DBG_DUMP_CG(&sblock, "old summary cg", &acg);
958 * Find the beginning of the new cylinder group containing the
961 sblock.fs_csaddr = cgdmin(&sblock, osblock.fs_ncg);
962 ncscg = dtog(&sblock, sblock.fs_csaddr);
966 * If Nflag is specified, we would now read random data instead
967 * of an empty cg structure from disk. So we can't simulate that
971 DBG_PRINT0("nscg update skipped\n");
977 * Read the future cylinder group containing the cylinder
978 * summary from disk, and make a copy.
980 rdfs(fsbtodb(&sblock, cgtod(&sblock, ncscg)),
981 (size_t)sblock.fs_cgsize, (void *)&aocg, fsi);
982 DBG_PRINT0("nscg read\n");
983 DBG_DUMP_CG(&sblock, "new summary cg", &aocg);
985 memcpy((void *)&cgun1, (void *)&cgun2, sizeof(cgun2));
988 * Allocate all complete blocks used by the new cylinder
991 for (d = sblock.fs_csaddr; d + sblock.fs_frag <=
992 sblock.fs_csaddr + (sblock.fs_cssize / sblock.fs_fsize);
993 d += sblock.fs_frag) {
994 clrblock(&sblock, cg_blksfree(&acg),
995 (d % sblock.fs_fpg) / sblock.fs_frag);
996 acg.cg_cs.cs_nbfree--;
997 sblock.fs_cstotal.cs_nbfree--;
998 if (sblock.fs_contigsumsize > 0) {
999 clrbit(cg_clustersfree(&acg),
1000 (d % sblock.fs_fpg) / sblock.fs_frag);
1005 * Allocate all fragments used by the cylinder summary in the
1008 if (d < sblock.fs_csaddr + (sblock.fs_cssize / sblock.fs_fsize)) {
1009 for (; d - sblock.fs_csaddr <
1010 sblock.fs_cssize/sblock.fs_fsize; d++) {
1011 clrbit(cg_blksfree(&acg), d % sblock.fs_fpg);
1012 acg.cg_cs.cs_nffree--;
1013 sblock.fs_cstotal.cs_nffree--;
1015 acg.cg_cs.cs_nbfree--;
1016 acg.cg_cs.cs_nffree += sblock.fs_frag;
1017 sblock.fs_cstotal.cs_nbfree--;
1018 sblock.fs_cstotal.cs_nffree += sblock.fs_frag;
1019 if (sblock.fs_contigsumsize > 0)
1020 clrbit(cg_clustersfree(&acg),
1021 (d % sblock.fs_fpg) / sblock.fs_frag);
1023 frag_adjust(d % sblock.fs_fpg, 1);
1026 * XXX Handle the cluster statistics here in the case this
1027 * cylinder group is now almost full, and the remaining
1028 * space is less then the maximum cluster size. This is
1029 * probably not needed, as you would hardly find a file
1030 * system which has only MAXCSBUFS+FS_MAXCONTIG of free
1031 * space right behind the cylinder group information in
1032 * any new cylinder group.
1036 * Update our statistics in the cylinder summary.
1041 * Write the new cylinder group containing the cylinder summary
1045 wtfs(fsbtodb(&sblock, cgtod(&sblock, ncscg)),
1046 (size_t)sblock.fs_cgsize, (void *)&acg, fso, Nflag);
1047 DBG_PRINT0("nscg written\n");
1048 DBG_DUMP_CG(&sblock, "new summary cg", &acg);
1055 * Here we read some block(s) from disk.
1058 rdfs(ufs2_daddr_t bno, size_t size, void *bf, int fsi)
1066 err(32, "rdfs: attempting to read negative block number");
1067 if (lseek(fsi, (off_t)bno * DEV_BSIZE, 0) < 0)
1068 err(33, "rdfs: seek error: %jd", (intmax_t)bno);
1069 n = read(fsi, bf, size);
1070 if (n != (ssize_t)size)
1071 err(34, "rdfs: read error: %jd", (intmax_t)bno);
1078 * Here we write some block(s) to disk.
1081 wtfs(ufs2_daddr_t bno, size_t size, void *bf, int fso, unsigned int Nflag)
1092 if (lseek(fso, (off_t)bno * DEV_BSIZE, SEEK_SET) < 0)
1093 err(35, "wtfs: seek error: %ld", (long)bno);
1094 n = write(fso, bf, size);
1095 if (n != (ssize_t)size)
1096 err(36, "wtfs: write error: %ld", (long)bno);
1103 * Here we check if all frags of a block are free. For more details again
1104 * please see the source of newfs(8), as this function is taken over almost
1108 isblock(struct fs *fs, unsigned char *cp, int h)
1115 switch (fs->fs_frag) {
1118 return (cp[h] == 0xff);
1120 mask = 0x0f << ((h & 0x1) << 2);
1122 return ((cp[h >> 1] & mask) == mask);
1124 mask = 0x03 << ((h & 0x3) << 1);
1126 return ((cp[h >> 2] & mask) == mask);
1128 mask = 0x01 << (h & 0x7);
1130 return ((cp[h >> 3] & mask) == mask);
1132 fprintf(stderr, "isblock bad fs_frag %d\n", fs->fs_frag);
1139 * Here we allocate a complete block in the block map. For more details again
1140 * please see the source of newfs(8), as this function is taken over almost
1144 clrblock(struct fs *fs, unsigned char *cp, int h)
1146 DBG_FUNC("clrblock")
1150 switch ((fs)->fs_frag) {
1155 cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2));
1158 cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1));
1161 cp[h >> 3] &= ~(0x01 << (h & 0x7));
1164 warnx("clrblock bad fs_frag %d", fs->fs_frag);
1173 * Here we free a complete block in the free block map. For more details again
1174 * please see the source of newfs(8), as this function is taken over almost
1178 setblock(struct fs *fs, unsigned char *cp, int h)
1180 DBG_FUNC("setblock")
1184 switch (fs->fs_frag) {
1189 cp[h >> 1] |= (0x0f << ((h & 0x1) << 2));
1192 cp[h >> 2] |= (0x03 << ((h & 0x3) << 1));
1195 cp[h >> 3] |= (0x01 << (h & 0x7));
1198 warnx("setblock bad fs_frag %d", fs->fs_frag);
1207 * Figure out how many lines our current terminal has. For more details again
1208 * please see the source of newfs(8), as this function is taken over almost
1214 DBG_FUNC("charsperline")
1222 if (ioctl(0, TIOCGWINSZ, &ws) != -1)
1223 columns = ws.ws_col;
1224 if (columns == 0 && (cp = getenv("COLUMNS")))
1227 columns = 80; /* last resort */
1234 is_dev(const char *name)
1236 struct stat devstat;
1238 if (stat(name, &devstat) != 0)
1240 if (!S_ISCHR(devstat.st_mode))
1246 * Return mountpoint on which the device is currently mounted.
1248 static const struct statfs *
1249 dev_to_statfs(const char *dev)
1251 struct stat devstat, mntdevstat;
1252 struct statfs *mntbuf, *statfsp;
1253 char device[MAXPATHLEN];
1258 * First check the mounted filesystems.
1260 if (stat(dev, &devstat) != 0)
1262 if (!S_ISCHR(devstat.st_mode) && !S_ISBLK(devstat.st_mode))
1265 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
1266 for (i = 0; i < mntsize; i++) {
1267 statfsp = &mntbuf[i];
1268 mntdevname = statfsp->f_mntfromname;
1269 if (*mntdevname != '/') {
1270 strcpy(device, _PATH_DEV);
1271 strcat(device, mntdevname);
1272 mntdevname = device;
1274 if (stat(mntdevname, &mntdevstat) == 0 &&
1275 mntdevstat.st_rdev == devstat.st_rdev)
1283 mountpoint_to_dev(const char *mountpoint)
1285 struct statfs *mntbuf, *statfsp;
1290 * First check the mounted filesystems.
1292 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
1293 for (i = 0; i < mntsize; i++) {
1294 statfsp = &mntbuf[i];
1296 if (strcmp(statfsp->f_mntonname, mountpoint) == 0)
1297 return (statfsp->f_mntfromname);
1303 fs = getfsfile(mountpoint);
1305 return (fs->fs_spec);
1311 getdev(const char *name)
1313 static char device[MAXPATHLEN];
1314 const char *cp, *dev;
1319 cp = strrchr(name, '/');
1321 snprintf(device, sizeof(device), "%s%s", _PATH_DEV, name);
1326 dev = mountpoint_to_dev(name);
1327 if (dev != NULL && is_dev(dev))
1334 * growfs(8) is a utility which allows to increase the size of an existing
1335 * ufs file system. Currently this can only be done on unmounted file system.
1336 * It recognizes some command line options to specify the new desired size,
1337 * and it does some basic checkings. The old file system size is determined
1338 * and after some more checks like we can really access the new last block
1339 * on the disk etc. we calculate the new parameters for the superblock. After
1340 * having done this we just call growfs() which will do the work.
1341 * We still have to provide support for snapshots. Therefore we first have to
1342 * understand what data structures are always replicated in the snapshot on
1343 * creation, for all other blocks we touch during our procedure, we have to
1344 * keep the old blocks unchanged somewhere available for the snapshots. If we
1345 * are lucky, then we only have to handle our blocks to be relocated in that
1347 * Also we have to consider in what order we actually update the critical
1348 * data structures of the file system to make sure, that in case of a disaster
1349 * fsck(8) is still able to restore any lost data.
1350 * The foreseen last step then will be to provide for growing even mounted
1351 * file systems. There we have to extend the mount() system call to provide
1352 * userland access to the file system locking facility.
1355 main(int argc, char **argv)
1360 const struct statfs *statfsp;
1363 int error, j, fsi, fso, ch, ret, Nflag = 0, yflag = 0;
1364 char *p, reply[5], oldsizebuf[6], newsizebuf[6];
1369 while ((ch = getopt(argc, argv, "Ns:vy")) != -1) {
1375 size = (off_t)strtoumax(optarg, &p, 0);
1376 if (p == NULL || *p == '\0')
1378 else if (*p == 'b' || *p == 'B')
1380 else if (*p == 'k' || *p == 'K')
1382 else if (*p == 'm' || *p == 'M')
1384 else if (*p == 'g' || *p == 'G')
1386 else if (*p == 't' || *p == 'T') {
1390 errx(1, "unknown suffix on -s argument");
1392 case 'v': /* for compatibility to newfs */
1410 * Now try to guess the device name.
1412 device = getdev(*argv);
1414 errx(1, "cannot find special device for %s", *argv);
1416 statfsp = dev_to_statfs(device);
1418 fsi = open(device, O_RDONLY);
1420 err(1, "%s", device);
1423 * Try to guess the slice size if not specified.
1425 if (ioctl(fsi, DIOCGMEDIASIZE, &mediasize) == -1)
1426 err(1,"DIOCGMEDIASIZE");
1429 * Check if that partition is suitable for growing a file system.
1432 errx(1, "partition is unavailable");
1435 * Read the current superblock, and take a backup.
1437 if ((ret = sbget(fsi, &fs, -1)) != 0) {
1440 errx(1, "superblock not recognized");
1442 errc(1, ret, "unable to read superblock");
1446 * Check for filesystem that was unclean at mount time.
1448 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) != 0)
1449 errx(1, "%s is not clean - run fsck.\n", *argv);
1450 memcpy(&osblock, fs, fs->fs_sbsize);
1452 memcpy((void *)&fsun1, (void *)&fsun2, osblock.fs_sbsize);
1454 DBG_OPEN("/tmp/growfs.debug"); /* already here we need a superblock */
1455 DBG_DUMP_FS(&sblock, "old sblock");
1458 * Determine size to grow to. Default to the device size.
1463 if (size > (uint64_t)mediasize) {
1464 humanize_number(oldsizebuf, sizeof(oldsizebuf), size,
1465 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1466 humanize_number(newsizebuf, sizeof(newsizebuf),
1468 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1470 errx(1, "requested size %s is larger "
1471 "than the available %s", oldsizebuf, newsizebuf);
1476 * Make sure the new size is a multiple of fs_fsize; /dev/ufssuspend
1477 * only supports fragment-aligned IO requests.
1479 size -= size % osblock.fs_fsize;
1481 if (size <= (uint64_t)(osblock.fs_size * osblock.fs_fsize)) {
1482 humanize_number(oldsizebuf, sizeof(oldsizebuf),
1483 osblock.fs_size * osblock.fs_fsize,
1484 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1485 humanize_number(newsizebuf, sizeof(newsizebuf), size,
1486 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1488 errx(1, "requested size %s is not larger than the current "
1489 "filesystem size %s", newsizebuf, oldsizebuf);
1492 sblock.fs_size = dbtofsb(&osblock, size / DEV_BSIZE);
1493 sblock.fs_providersize = dbtofsb(&osblock, mediasize / DEV_BSIZE);
1496 * Are we really growing?
1498 if (osblock.fs_size >= sblock.fs_size) {
1499 errx(1, "we are not growing (%jd->%jd)",
1500 (intmax_t)osblock.fs_size, (intmax_t)sblock.fs_size);
1504 * Check if we find an active snapshot.
1507 for (j = 0; j < FSMAXSNAP; j++) {
1508 if (sblock.fs_snapinum[j]) {
1509 errx(1, "active snapshot found in file system; "
1510 "please remove all snapshots before "
1513 if (!sblock.fs_snapinum[j]) /* list is dense */
1518 if (yflag == 0 && Nflag == 0) {
1519 if (statfsp != NULL && (statfsp->f_flags & MNT_RDONLY) == 0)
1520 printf("Device is mounted read-write; resizing will "
1521 "result in temporary write suspension for %s.\n",
1522 statfsp->f_mntonname);
1523 printf("It's strongly recommended to make a backup "
1524 "before growing the file system.\n"
1525 "OK to grow filesystem on %s", device);
1526 if (statfsp != NULL)
1527 printf(", mounted on %s,", statfsp->f_mntonname);
1528 humanize_number(oldsizebuf, sizeof(oldsizebuf),
1529 osblock.fs_size * osblock.fs_fsize,
1530 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1531 humanize_number(newsizebuf, sizeof(newsizebuf),
1532 sblock.fs_size * sblock.fs_fsize,
1533 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1534 printf(" from %s to %s? [yes/no] ", oldsizebuf, newsizebuf);
1536 fgets(reply, (int)sizeof(reply), stdin);
1537 if (strcasecmp(reply, "yes\n")){
1538 printf("Response other than \"yes\"; aborting\n");
1544 * Try to access our device for writing. If it's not mounted,
1545 * or mounted read-only, simply open it; otherwise, use UFS
1546 * suspension mechanism.
1551 if (statfsp != NULL && (statfsp->f_flags & MNT_RDONLY) == 0) {
1552 fso = open(_PATH_UFSSUSPEND, O_RDWR);
1554 err(1, "unable to open %s", _PATH_UFSSUSPEND);
1555 error = ioctl(fso, UFSSUSPEND, &statfsp->f_fsid);
1557 err(1, "UFSSUSPEND");
1559 fso = open(device, O_WRONLY);
1561 err(1, "%s", device);
1566 * Try to access our new last block in the file system.
1568 testbuf = malloc(sblock.fs_fsize);
1569 if (testbuf == NULL)
1571 rdfs((ufs2_daddr_t)((size - sblock.fs_fsize) / DEV_BSIZE),
1572 sblock.fs_fsize, testbuf, fsi);
1573 wtfs((ufs2_daddr_t)((size - sblock.fs_fsize) / DEV_BSIZE),
1574 sblock.fs_fsize, testbuf, fso, Nflag);
1578 * Now calculate new superblock values and check for reasonable
1579 * bound for new file system size:
1580 * fs_size: is derived from user input
1581 * fs_dsize: should get updated in the routines creating or
1582 * updating the cylinder groups on the fly
1583 * fs_cstotal: should get updated in the routines creating or
1584 * updating the cylinder groups
1588 * Update the number of cylinders and cylinder groups in the file system.
1590 if (sblock.fs_magic == FS_UFS1_MAGIC) {
1591 sblock.fs_old_ncyl =
1592 sblock.fs_size * sblock.fs_old_nspf / sblock.fs_old_spc;
1593 if (sblock.fs_size * sblock.fs_old_nspf >
1594 sblock.fs_old_ncyl * sblock.fs_old_spc)
1595 sblock.fs_old_ncyl++;
1597 sblock.fs_ncg = howmany(sblock.fs_size, sblock.fs_fpg);
1600 * Allocate last cylinder group only if there is enough room
1601 * for at least one data block.
1603 if (sblock.fs_size % sblock.fs_fpg != 0 &&
1604 sblock.fs_size <= cgdmin(&sblock, sblock.fs_ncg - 1)) {
1605 humanize_number(oldsizebuf, sizeof(oldsizebuf),
1606 (sblock.fs_size % sblock.fs_fpg) * sblock.fs_fsize,
1607 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1608 warnx("no room to allocate last cylinder group; "
1609 "leaving %s unused", oldsizebuf);
1611 if (sblock.fs_magic == FS_UFS1_MAGIC)
1612 sblock.fs_old_ncyl = sblock.fs_ncg * sblock.fs_old_cpg;
1613 sblock.fs_size = sblock.fs_ncg * sblock.fs_fpg;
1617 * Update the space for the cylinder group summary information in the
1618 * respective cylinder group data area.
1621 fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum));
1623 if (osblock.fs_size >= sblock.fs_size)
1624 errx(1, "not enough new space");
1626 DBG_PRINT0("sblock calculated\n");
1629 * Ok, everything prepared, so now let's do the tricks.
1631 growfs(fsi, fso, Nflag);
1635 if (statfsp != NULL && (statfsp->f_flags & MNT_RDONLY) == 0) {
1636 error = ioctl(fso, UFSRESUME);
1638 err(1, "UFSRESUME");
1643 if (statfsp != NULL && (statfsp->f_flags & MNT_RDONLY) != 0)
1644 mount_reload(statfsp);
1654 * Dump a line of usage.
1663 fprintf(stderr, "usage: growfs [-Ny] [-s size] special | filesystem\n");
1670 * This updates most parameters and the bitmap related to cluster. We have to
1671 * assume that sblock, osblock, acg are set up.
1681 if (sblock.fs_contigsumsize < 1) /* no clustering */
1684 * update cluster allocation map
1686 setbit(cg_clustersfree(&acg), block);
1689 * update cluster summary table
1693 * calculate size for the trailing cluster
1695 for (block--; lcs < sblock.fs_contigsumsize; block--, lcs++ ) {
1696 if (isclr(cg_clustersfree(&acg), block))
1700 if (lcs < sblock.fs_contigsumsize) {
1702 cg_clustersum(&acg)[lcs]--;
1704 cg_clustersum(&acg)[lcs]++;
1712 mount_reload(const struct statfs *stfs)
1721 build_iovec(&iov, &iovlen, "fstype", __DECONST(char *, "ffs"), 4);
1722 build_iovec(&iov, &iovlen, "fspath", __DECONST(char *, stfs->f_mntonname), (size_t)-1);
1723 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
1724 build_iovec(&iov, &iovlen, "update", NULL, 0);
1725 build_iovec(&iov, &iovlen, "reload", NULL, 0);
1727 if (nmount(iov, iovlen, stfs->f_flags) < 0) {
1728 errmsg[sizeof(errmsg) - 1] = '\0';
1729 err(9, "%s: cannot reload filesystem%s%s", stfs->f_mntonname,
1730 *errmsg != '\0' ? ": " : "", errmsg);
1735 * Calculate the check-hash of the cylinder group.
1738 cgckhash(struct cg *cgp)
1741 if ((sblock.fs_metackhash & CK_CYLGRP) == 0)
1744 cgp->cg_ckhash = calculate_crc32c(~0L, (void *)cgp, sblock.fs_cgsize);