2 * Copyright (c) 1980, 1989, 1993 The Regents of the University of California.
3 * Copyright (c) 2000 Christoph Herrmann, Thomas-Henning von Kamptz
4 * Copyright (c) 2012 The FreeBSD Foundation
7 * This code is derived from software contributed to Berkeley by
8 * Christoph Herrmann and Thomas-Henning von Kamptz, Munich and Frankfurt.
10 * Portions of this software were developed by Edward Tomasz Napierala
11 * under sponsorship from the FreeBSD Foundation.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. All advertising materials mentioning features or use of this software
22 * must display the following acknowledgment:
23 * This product includes software developed by the University of
24 * California, Berkeley and its contributors, as well as Christoph
25 * Herrmann and Thomas-Henning von Kamptz.
26 * 4. Neither the name of the University nor the names of its contributors
27 * may be used to endorse or promote products derived from this software
28 * without specific prior written permission.
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * $TSHeader: src/sbin/growfs/growfs.c,v 1.5 2000/12/12 19:31:00 tomsoft Exp $
47 static const char copyright[] =
48 "@(#) Copyright (c) 2000 Christoph Herrmann, Thomas-Henning von Kamptz\n\
49 Copyright (c) 1980, 1989, 1993 The Regents of the University of California.\n\
50 All rights reserved.\n";
53 #include <sys/cdefs.h>
54 __FBSDID("$FreeBSD$");
56 #include <sys/param.h>
57 #include <sys/ioctl.h>
60 #include <sys/ucred.h>
61 #include <sys/mount.h>
77 #include <ufs/ufs/dinode.h>
78 #include <ufs/ffs/fs.h>
84 int _dbg_lvl_ = (DL_INFO); /* DL_TRC */
91 #define sblock fsun1.fs /* the new superblock */
92 #define osblock fsun2.fs /* the old superblock */
95 * Possible superblock locations ordered from most to least likely.
97 static int sblock_try[] = SBLOCKSEARCH;
98 static ufs2_daddr_t sblockloc;
104 #define acg cgun1.cg /* a cylinder cgroup (new) */
105 #define aocg cgun2.cg /* an old cylinder group */
107 static struct csum *fscs; /* cylinder summary */
109 static void growfs(int, int, unsigned int);
110 static void rdfs(ufs2_daddr_t, size_t, void *, int);
111 static void wtfs(ufs2_daddr_t, size_t, void *, int, unsigned int);
112 static int charsperline(void);
113 static void usage(void);
114 static int isblock(struct fs *, unsigned char *, int);
115 static void clrblock(struct fs *, unsigned char *, int);
116 static void setblock(struct fs *, unsigned char *, int);
117 static void initcg(int, time_t, int, unsigned int);
118 static void updjcg(int, time_t, int, int, unsigned int);
119 static void updcsloc(time_t, int, int, unsigned int);
120 static void frag_adjust(ufs2_daddr_t, int);
121 static void updclst(int);
122 static void mount_reload(const struct statfs *stfs);
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)
143 static int randinit = 0;
154 * Get the cylinder summary into the memory.
156 fscs = (struct csum *)calloc((size_t)1, (size_t)sblock.fs_cssize);
158 errx(1, "calloc failed");
159 for (i = 0; i < osblock.fs_cssize; i += osblock.fs_bsize) {
160 rdfs(fsbtodb(&osblock, osblock.fs_csaddr +
161 numfrags(&osblock, i)), (size_t)MIN(osblock.fs_cssize - i,
162 osblock.fs_bsize), (void *)(((char *)fscs) + i), fsi);
167 struct csum *dbg_csp;
173 for (dbg_csc = 0; dbg_csc < osblock.fs_ncg; dbg_csc++) {
174 snprintf(dbg_line, sizeof(dbg_line),
175 "%d. old csum in old location", dbg_csc);
176 DBG_DUMP_CSUM(&osblock, dbg_line, dbg_csp++);
179 #endif /* FS_DEBUG */
180 DBG_PRINT0("fscs read\n");
183 * Do all needed changes in the former last cylinder group.
185 updjcg(osblock.fs_ncg - 1, modtime, fsi, fso, Nflag);
188 * Dump out summary information about file system.
191 #define B2MBFACTOR (1 / (1024.0 * 1024.0))
192 printf("growfs: %.1fMB (%jd sectors) block size %d, fragment size %d\n",
193 (float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR,
194 (intmax_t)fsbtodb(&sblock, sblock.fs_size), sblock.fs_bsize,
196 printf("\tusing %d cylinder groups of %.2fMB, %d blks, %d inodes.\n",
197 sblock.fs_ncg, (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR,
198 sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg);
199 if (sblock.fs_flags & FS_DOSOFTDEP)
200 printf("\twith soft updates\n");
202 #endif /* FS_DEBUG */
205 * Now build the cylinders group blocks and
206 * then print out indices of cylinder groups.
208 printf("super-block backups (for fsck -b #) at:\n");
210 width = charsperline();
213 * Iterate for only the new cylinder groups.
215 for (cylno = osblock.fs_ncg; cylno < sblock.fs_ncg; cylno++) {
216 initcg(cylno, modtime, fso, Nflag);
217 j = sprintf(tmpbuf, " %jd%s",
218 (intmax_t)fsbtodb(&sblock, cgsblock(&sblock, cylno)),
219 cylno < (sblock.fs_ncg - 1) ? "," : "" );
220 if (i + j >= width) {
225 printf("%s", tmpbuf);
231 * Do all needed changes in the first cylinder group.
232 * allocate blocks in new location
234 updcsloc(modtime, fsi, fso, Nflag);
237 * Now write the cylinder summary back to disk.
239 for (i = 0; i < sblock.fs_cssize; i += sblock.fs_bsize) {
240 wtfs(fsbtodb(&sblock, sblock.fs_csaddr + numfrags(&sblock, i)),
241 (size_t)MIN(sblock.fs_cssize - i, sblock.fs_bsize),
242 (void *)(((char *)fscs) + i), fso, Nflag);
244 DBG_PRINT0("fscs written\n");
248 struct csum *dbg_csp;
253 for (dbg_csc = 0; dbg_csc < sblock.fs_ncg; dbg_csc++) {
254 snprintf(dbg_line, sizeof(dbg_line),
255 "%d. new csum in new location", dbg_csc);
256 DBG_DUMP_CSUM(&sblock, dbg_line, dbg_csp++);
259 #endif /* FS_DEBUG */
262 * Now write the new superblock back to disk.
264 sblock.fs_time = modtime;
265 wtfs(sblockloc, (size_t)SBLOCKSIZE, (void *)&sblock, fso, Nflag);
266 DBG_PRINT0("sblock written\n");
267 DBG_DUMP_FS(&sblock, "new initial sblock");
270 * Clean up the dynamic fields in our superblock copies.
275 sblock.fs_cgrotor = 0;
277 memset((void *)&sblock.fs_fsmnt, 0, sizeof(sblock.fs_fsmnt));
278 sblock.fs_flags &= FS_DOSOFTDEP;
282 * The following fields are currently distributed from the superblock
290 * fs_flags regarding SOFTPDATES
292 * We probably should rather change the summary for the cylinder group
293 * statistics here to the value of what would be in there, if the file
294 * system were created initially with the new size. Therefor we still
295 * need to find an easy way of calculating that.
296 * Possibly we can try to read the first superblock copy and apply the
297 * "diffed" stats between the old and new superblock by still copying
298 * certain parameters onto that.
302 * Write out the duplicate super blocks.
304 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) {
305 wtfs(fsbtodb(&sblock, cgsblock(&sblock, cylno)),
306 (size_t)SBLOCKSIZE, (void *)&sblock, fso, Nflag);
308 DBG_PRINT0("sblock copies written\n");
309 DBG_DUMP_FS(&sblock, "new other sblocks");
316 * This creates a new cylinder group structure, for more details please see
317 * the source of newfs(8), as this function is taken over almost unchanged.
318 * As this is never called for the first cylinder group, the special
319 * provisions for that case are removed here.
322 initcg(int cylno, time_t modtime, int fso, unsigned int Nflag)
325 static caddr_t iobuf;
327 ufs2_daddr_t i, cbase, dmax;
328 struct ufs1_dinode *dp1;
330 uint j, d, dupper, dlower;
332 if (iobuf == NULL && (iobuf = malloc(sblock.fs_bsize * 3)) == NULL)
333 errx(37, "panic: cannot allocate I/O buffer");
336 * Determine block bounds for cylinder group.
337 * Allow space for super block summary information in first
340 cbase = cgbase(&sblock, cylno);
341 dmax = cbase + sblock.fs_fpg;
342 if (dmax > sblock.fs_size)
343 dmax = sblock.fs_size;
344 dlower = cgsblock(&sblock, cylno) - cbase;
345 dupper = cgdmin(&sblock, cylno) - cbase;
346 if (cylno == 0) /* XXX fscs may be relocated */
347 dupper += howmany(sblock.fs_cssize, sblock.fs_fsize);
349 memset(&acg, 0, sblock.fs_cgsize);
350 acg.cg_time = modtime;
351 acg.cg_magic = CG_MAGIC;
353 acg.cg_niblk = sblock.fs_ipg;
354 acg.cg_initediblk = sblock.fs_ipg < 2 * INOPB(&sblock) ?
355 sblock.fs_ipg : 2 * INOPB(&sblock);
356 acg.cg_ndblk = dmax - cbase;
357 if (sblock.fs_contigsumsize > 0)
358 acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag;
359 start = &acg.cg_space[0] - (u_char *)(&acg.cg_firstfield);
360 if (sblock.fs_magic == FS_UFS2_MAGIC) {
361 acg.cg_iusedoff = start;
363 acg.cg_old_ncyl = sblock.fs_old_cpg;
364 acg.cg_old_time = acg.cg_time;
366 acg.cg_old_niblk = acg.cg_niblk;
368 acg.cg_initediblk = 0;
369 acg.cg_old_btotoff = start;
370 acg.cg_old_boff = acg.cg_old_btotoff +
371 sblock.fs_old_cpg * sizeof(int32_t);
372 acg.cg_iusedoff = acg.cg_old_boff +
373 sblock.fs_old_cpg * sizeof(u_int16_t);
375 acg.cg_freeoff = acg.cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT);
376 acg.cg_nextfreeoff = acg.cg_freeoff + howmany(sblock.fs_fpg, CHAR_BIT);
377 if (sblock.fs_contigsumsize > 0) {
378 acg.cg_clustersumoff =
379 roundup(acg.cg_nextfreeoff, sizeof(u_int32_t));
380 acg.cg_clustersumoff -= sizeof(u_int32_t);
381 acg.cg_clusteroff = acg.cg_clustersumoff +
382 (sblock.fs_contigsumsize + 1) * sizeof(u_int32_t);
383 acg.cg_nextfreeoff = acg.cg_clusteroff +
384 howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT);
386 if (acg.cg_nextfreeoff > (unsigned)sblock.fs_cgsize) {
388 * This should never happen as we would have had that panic
389 * already on file system creation
391 errx(37, "panic: cylinder group too big");
393 acg.cg_cs.cs_nifree += sblock.fs_ipg;
395 for (i = 0; i < ROOTINO; i++) {
396 setbit(cg_inosused(&acg), i);
397 acg.cg_cs.cs_nifree--;
400 * For the old file system, we have to initialize all the inodes.
402 if (sblock.fs_magic == FS_UFS1_MAGIC) {
403 bzero(iobuf, sblock.fs_bsize);
404 for (i = 0; i < sblock.fs_ipg / INOPF(&sblock);
405 i += sblock.fs_frag) {
406 dp1 = (struct ufs1_dinode *)(void *)iobuf;
407 for (j = 0; j < INOPB(&sblock); j++) {
408 dp1->di_gen = random();
411 wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno) + i),
412 sblock.fs_bsize, iobuf, fso, Nflag);
417 * In cylno 0, beginning space is reserved
418 * for boot and super blocks.
420 for (d = 0; d < dlower; d += sblock.fs_frag) {
421 blkno = d / sblock.fs_frag;
422 setblock(&sblock, cg_blksfree(&acg), blkno);
423 if (sblock.fs_contigsumsize > 0)
424 setbit(cg_clustersfree(&acg), blkno);
425 acg.cg_cs.cs_nbfree++;
427 sblock.fs_dsize += dlower;
429 sblock.fs_dsize += acg.cg_ndblk - dupper;
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;
487 memcpy(iobuf, &acg, sblock.fs_cgsize);
488 memset(iobuf + sblock.fs_cgsize, '\0',
489 sblock.fs_bsize * 3 - sblock.fs_cgsize);
491 wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)),
492 sblock.fs_bsize * 3, iobuf, fso, Nflag);
493 DBG_DUMP_CG(&sblock, "new cg", &acg);
500 * Here we add or subtract (sign +1/-1) the available fragments in a given
501 * block to or from the fragment statistics. By subtracting before and adding
502 * after an operation on the free frag map we can easy update the fragment
503 * statistic, which seems to be otherwise a rather complex operation.
506 frag_adjust(ufs2_daddr_t frag, int sign)
508 DBG_FUNC("frag_adjust")
516 * Here frag only needs to point to any fragment in the block we want
519 for (f = rounddown(frag, sblock.fs_frag);
520 f < roundup(frag + 1, sblock.fs_frag); f++) {
522 * Count contiguous free fragments.
524 if (isset(cg_blksfree(&acg), f)) {
527 if (fragsize && fragsize < sblock.fs_frag) {
529 * We found something in between.
531 acg.cg_frsum[fragsize] += sign;
532 DBG_PRINT2("frag_adjust [%d]+=%d\n",
538 if (fragsize && fragsize < sblock.fs_frag) {
540 * We found something.
542 acg.cg_frsum[fragsize] += sign;
543 DBG_PRINT2("frag_adjust [%d]+=%d\n", fragsize, sign);
545 DBG_PRINT2("frag_adjust [[%d]]+=%d\n", fragsize, sign);
552 * Here we do all needed work for the former last cylinder group. It has to be
553 * changed in any case, even if the file system ended exactly on the end of
554 * this group, as there is some slightly inconsistent handling of the number
555 * of cylinders in the cylinder group. We start again by reading the cylinder
556 * group from disk. If the last block was not fully available, we first handle
557 * the missing fragments, then we handle all new full blocks in that file
558 * system and finally we handle the new last fragmented block in the file
559 * system. We again have to handle the fragment statistics rotational layout
560 * tables and cluster summary during all those operations.
563 updjcg(int cylno, time_t modtime, int fsi, int fso, unsigned int Nflag)
566 ufs2_daddr_t cbase, dmax, dupper;
574 * Read the former last (joining) cylinder group from disk, and make
577 rdfs(fsbtodb(&osblock, cgtod(&osblock, cylno)),
578 (size_t)osblock.fs_cgsize, (void *)&aocg, fsi);
579 DBG_PRINT0("jcg read\n");
580 DBG_DUMP_CG(&sblock, "old joining cg", &aocg);
582 memcpy((void *)&cgun1, (void *)&cgun2, sizeof(cgun2));
585 * If the cylinder group had already its new final size almost
586 * nothing is to be done ... except:
587 * For some reason the value of cg_ncyl in the last cylinder group has
588 * to be zero instead of fs_cpg. As this is now no longer the last
589 * cylinder group we have to change that value now to fs_cpg.
592 if (cgbase(&osblock, cylno + 1) == osblock.fs_size) {
593 if (sblock.fs_magic == FS_UFS1_MAGIC)
594 acg.cg_old_ncyl = sblock.fs_old_cpg;
596 wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)),
597 (size_t)sblock.fs_cgsize, (void *)&acg, fso, Nflag);
598 DBG_PRINT0("jcg written\n");
599 DBG_DUMP_CG(&sblock, "new joining cg", &acg);
606 * Set up some variables needed later.
608 cbase = cgbase(&sblock, cylno);
609 dmax = cbase + sblock.fs_fpg;
610 if (dmax > sblock.fs_size)
611 dmax = sblock.fs_size;
612 dupper = cgdmin(&sblock, cylno) - cbase;
613 if (cylno == 0) /* XXX fscs may be relocated */
614 dupper += howmany(sblock.fs_cssize, sblock.fs_fsize);
617 * Set pointer to the cylinder summary for our cylinder group.
622 * Touch the cylinder group, update all fields in the cylinder group as
623 * needed, update the free space in the superblock.
625 acg.cg_time = modtime;
626 if ((unsigned)cylno == sblock.fs_ncg - 1) {
628 * This is still the last cylinder group.
630 if (sblock.fs_magic == FS_UFS1_MAGIC)
632 sblock.fs_old_ncyl % sblock.fs_old_cpg;
634 acg.cg_old_ncyl = sblock.fs_old_cpg;
636 DBG_PRINT2("jcg dbg: %d %u", cylno, sblock.fs_ncg);
638 if (sblock.fs_magic == FS_UFS1_MAGIC)
639 DBG_PRINT2("%d %u", acg.cg_old_ncyl, sblock.fs_old_cpg);
642 acg.cg_ndblk = dmax - cbase;
643 sblock.fs_dsize += acg.cg_ndblk - aocg.cg_ndblk;
644 if (sblock.fs_contigsumsize > 0)
645 acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag;
648 * Now we have to update the free fragment bitmap for our new free
649 * space. There again we have to handle the fragmentation and also
650 * the rotational layout tables and the cluster summary. This is
651 * also done per fragment for the first new block if the old file
652 * system end was not on a block boundary, per fragment for the new
653 * last block if the new file system end is not on a block boundary,
654 * and per block for all space in between.
656 * Handle the first new block here if it was partially available
659 if (osblock.fs_size % sblock.fs_frag) {
660 if (roundup(osblock.fs_size, sblock.fs_frag) <=
663 * The new space is enough to fill at least this
667 for (i = roundup(osblock.fs_size - cbase,
668 sblock.fs_frag) - 1; i >= osblock.fs_size - cbase;
670 setbit(cg_blksfree(&acg), i);
671 acg.cg_cs.cs_nffree++;
676 * Check if the fragment just created could join an
677 * already existing fragment at the former end of the
680 if (isblock(&sblock, cg_blksfree(&acg),
681 ((osblock.fs_size - cgbase(&sblock, cylno)) /
684 * The block is now completely available.
686 DBG_PRINT0("block was\n");
687 acg.cg_frsum[osblock.fs_size % sblock.fs_frag]--;
688 acg.cg_cs.cs_nbfree++;
689 acg.cg_cs.cs_nffree -= sblock.fs_frag;
690 k = rounddown(osblock.fs_size - cbase,
692 updclst((osblock.fs_size - cbase) /
696 * Lets rejoin a possible partially growed
700 while (isset(cg_blksfree(&acg), i) &&
701 (i >= rounddown(osblock.fs_size - cbase,
708 acg.cg_frsum[k + j]++;
712 * We only grow by some fragments within this last
715 for (i = sblock.fs_size - cbase - 1;
716 i >= osblock.fs_size - cbase; i--) {
717 setbit(cg_blksfree(&acg), i);
718 acg.cg_cs.cs_nffree++;
722 * Lets rejoin a possible partially growed fragment.
725 while (isset(cg_blksfree(&acg), i) &&
726 (i >= rounddown(osblock.fs_size - cbase,
733 acg.cg_frsum[k + j]++;
738 * Handle all new complete blocks here.
740 for (i = roundup(osblock.fs_size - cbase, sblock.fs_frag);
741 i + sblock.fs_frag <= dmax - cbase; /* XXX <= or only < ? */
742 i += sblock.fs_frag) {
743 j = i / sblock.fs_frag;
744 setblock(&sblock, cg_blksfree(&acg), j);
746 acg.cg_cs.cs_nbfree++;
750 * Handle the last new block if there are stll some new fragments left.
751 * Here we don't have to bother about the cluster summary or the even
752 * the rotational layout table.
754 if (i < (dmax - cbase)) {
755 acg.cg_frsum[dmax - cbase - i]++;
756 for (; i < dmax - cbase; i++) {
757 setbit(cg_blksfree(&acg), i);
758 acg.cg_cs.cs_nffree++;
762 sblock.fs_cstotal.cs_nffree +=
763 (acg.cg_cs.cs_nffree - aocg.cg_cs.cs_nffree);
764 sblock.fs_cstotal.cs_nbfree +=
765 (acg.cg_cs.cs_nbfree - aocg.cg_cs.cs_nbfree);
767 * The following statistics are not changed here:
768 * sblock.fs_cstotal.cs_ndir
769 * sblock.fs_cstotal.cs_nifree
770 * As the statistics for this cylinder group are ready, copy it to
771 * the summary information array.
776 * Write the updated "joining" cylinder group back to disk.
778 wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)), (size_t)sblock.fs_cgsize,
779 (void *)&acg, fso, Nflag);
780 DBG_PRINT0("jcg written\n");
781 DBG_DUMP_CG(&sblock, "new joining cg", &acg);
788 * Here we update the location of the cylinder summary. We have two possible
789 * ways of growing the cylinder summary:
790 * (1) We can try to grow the summary in the current location, and relocate
791 * possibly used blocks within the current cylinder group.
792 * (2) Alternatively we can relocate the whole cylinder summary to the first
793 * new completely empty cylinder group. Once the cylinder summary is no
794 * longer in the beginning of the first cylinder group you should never
795 * use a version of fsck which is not aware of the possibility to have
796 * this structure in a non standard place.
797 * Option (2) is considered to be less intrusive to the structure of the file-
798 * system, so that's the one being used.
801 updcsloc(time_t modtime, int fsi, int fso, unsigned int Nflag)
813 if (howmany(sblock.fs_cssize, sblock.fs_fsize) ==
814 howmany(osblock.fs_cssize, osblock.fs_fsize)) {
816 * No new fragment needed.
821 ocscg = dtog(&osblock, osblock.fs_csaddr);
823 blocks = 1 + howmany(sblock.fs_cssize, sblock.fs_bsize) -
824 howmany(osblock.fs_cssize, osblock.fs_bsize);
827 * Read original cylinder group from disk, and make a copy.
828 * XXX If Nflag is set in some very rare cases we now miss
829 * some changes done in updjcg by reading the unmodified
832 rdfs(fsbtodb(&osblock, cgtod(&osblock, ocscg)),
833 (size_t)osblock.fs_cgsize, (void *)&aocg, fsi);
834 DBG_PRINT0("oscg read\n");
835 DBG_DUMP_CG(&sblock, "old summary cg", &aocg);
837 memcpy((void *)&cgun1, (void *)&cgun2, sizeof(cgun2));
840 * Touch the cylinder group, set up local variables needed later
841 * and update the superblock.
843 acg.cg_time = modtime;
846 * XXX In the case of having active snapshots we may need much more
847 * blocks for the copy on write. We need each block twice, and
848 * also up to 8*3 blocks for indirect blocks for all possible
852 * There is not enough space in the old cylinder group to
853 * relocate all blocks as needed, so we relocate the whole
854 * cylinder group summary to a new group. We try to use the
855 * first complete new cylinder group just created. Within the
856 * cylinder group we align the area immediately after the
857 * cylinder group information location in order to be as
858 * close as possible to the original implementation of ffs.
860 * First we have to make sure we'll find enough space in the
861 * new cylinder group. If not, then we currently give up.
862 * We start with freeing everything which was used by the
863 * fragments of the old cylinder summary in the current group.
864 * Now we write back the group meta data, read in the needed
865 * meta data from the new cylinder group, and start allocating
866 * within that group. Here we can assume, the group to be
867 * completely empty. Which makes the handling of fragments and
868 * clusters a lot easier.
871 if (sblock.fs_ncg - osblock.fs_ncg < 2)
872 errx(2, "panic: not enough space");
875 * Point "d" to the first fragment not used by the cylinder
878 d = osblock.fs_csaddr + (osblock.fs_cssize / osblock.fs_fsize);
881 * Set up last cluster size ("lcs") already here. Calculate
882 * the size for the trailing cluster just behind where "d"
885 if (sblock.fs_contigsumsize > 0) {
886 for (block = howmany(d % sblock.fs_fpg, sblock.fs_frag),
887 lcs = 0; lcs < sblock.fs_contigsumsize; block++, lcs++) {
888 if (isclr(cg_clustersfree(&acg), block))
894 * Point "d" to the last frag used by the cylinder summary.
898 DBG_PRINT1("d=%jd\n", (intmax_t)d);
899 if ((d + 1) % sblock.fs_frag) {
901 * The end of the cylinder summary is not a complete
905 frag_adjust(d % sblock.fs_fpg, -1);
906 for (; (d + 1) % sblock.fs_frag; d--) {
907 DBG_PRINT1("d=%jd\n", (intmax_t)d);
908 setbit(cg_blksfree(&acg), d % sblock.fs_fpg);
909 acg.cg_cs.cs_nffree++;
910 sblock.fs_cstotal.cs_nffree++;
913 * Point "d" to the last fragment of the last
914 * (incomplete) block of the cylinder summary.
917 frag_adjust(d % sblock.fs_fpg, 1);
919 if (isblock(&sblock, cg_blksfree(&acg),
920 (d % sblock.fs_fpg) / sblock.fs_frag)) {
921 DBG_PRINT1("d=%jd\n", (intmax_t)d);
922 acg.cg_cs.cs_nffree -= sblock.fs_frag;
923 acg.cg_cs.cs_nbfree++;
924 sblock.fs_cstotal.cs_nffree -= sblock.fs_frag;
925 sblock.fs_cstotal.cs_nbfree++;
926 if (sblock.fs_contigsumsize > 0) {
927 setbit(cg_clustersfree(&acg),
928 (d % sblock.fs_fpg) / sblock.fs_frag);
929 if (lcs < sblock.fs_contigsumsize) {
931 cg_clustersum(&acg)[lcs]--;
933 cg_clustersum(&acg)[lcs]++;
938 * Point "d" to the first fragment of the block before
939 * the last incomplete block.
944 DBG_PRINT1("d=%jd\n", (intmax_t)d);
945 for (d = rounddown(d, sblock.fs_frag); d >= osblock.fs_csaddr;
946 d -= sblock.fs_frag) {
948 DBG_PRINT1("d=%jd\n", (intmax_t)d);
949 setblock(&sblock, cg_blksfree(&acg),
950 (d % sblock.fs_fpg) / sblock.fs_frag);
951 acg.cg_cs.cs_nbfree++;
952 sblock.fs_cstotal.cs_nbfree++;
953 if (sblock.fs_contigsumsize > 0) {
954 setbit(cg_clustersfree(&acg),
955 (d % sblock.fs_fpg) / sblock.fs_frag);
957 * The last cluster size is already set up.
959 if (lcs < sblock.fs_contigsumsize) {
961 cg_clustersum(&acg)[lcs]--;
963 cg_clustersum(&acg)[lcs]++;
970 * Now write the former cylinder group containing the cylinder
971 * summary back to disk.
973 wtfs(fsbtodb(&sblock, cgtod(&sblock, ocscg)),
974 (size_t)sblock.fs_cgsize, (void *)&acg, fso, Nflag);
975 DBG_PRINT0("oscg written\n");
976 DBG_DUMP_CG(&sblock, "old summary cg", &acg);
979 * Find the beginning of the new cylinder group containing the
982 sblock.fs_csaddr = cgdmin(&sblock, osblock.fs_ncg);
983 ncscg = dtog(&sblock, sblock.fs_csaddr);
987 * If Nflag is specified, we would now read random data instead
988 * of an empty cg structure from disk. So we can't simulate that
992 DBG_PRINT0("nscg update skipped\n");
998 * Read the future cylinder group containing the cylinder
999 * summary from disk, and make a copy.
1001 rdfs(fsbtodb(&sblock, cgtod(&sblock, ncscg)),
1002 (size_t)sblock.fs_cgsize, (void *)&aocg, fsi);
1003 DBG_PRINT0("nscg read\n");
1004 DBG_DUMP_CG(&sblock, "new summary cg", &aocg);
1006 memcpy((void *)&cgun1, (void *)&cgun2, sizeof(cgun2));
1009 * Allocate all complete blocks used by the new cylinder
1012 for (d = sblock.fs_csaddr; d + sblock.fs_frag <=
1013 sblock.fs_csaddr + (sblock.fs_cssize / sblock.fs_fsize);
1014 d += sblock.fs_frag) {
1015 clrblock(&sblock, cg_blksfree(&acg),
1016 (d % sblock.fs_fpg) / sblock.fs_frag);
1017 acg.cg_cs.cs_nbfree--;
1018 sblock.fs_cstotal.cs_nbfree--;
1019 if (sblock.fs_contigsumsize > 0) {
1020 clrbit(cg_clustersfree(&acg),
1021 (d % sblock.fs_fpg) / sblock.fs_frag);
1026 * Allocate all fragments used by the cylinder summary in the
1029 if (d < sblock.fs_csaddr + (sblock.fs_cssize / sblock.fs_fsize)) {
1030 for (; d - sblock.fs_csaddr <
1031 sblock.fs_cssize/sblock.fs_fsize; d++) {
1032 clrbit(cg_blksfree(&acg), d % sblock.fs_fpg);
1033 acg.cg_cs.cs_nffree--;
1034 sblock.fs_cstotal.cs_nffree--;
1036 acg.cg_cs.cs_nbfree--;
1037 acg.cg_cs.cs_nffree += sblock.fs_frag;
1038 sblock.fs_cstotal.cs_nbfree--;
1039 sblock.fs_cstotal.cs_nffree += sblock.fs_frag;
1040 if (sblock.fs_contigsumsize > 0)
1041 clrbit(cg_clustersfree(&acg),
1042 (d % sblock.fs_fpg) / sblock.fs_frag);
1044 frag_adjust(d % sblock.fs_fpg, 1);
1047 * XXX Handle the cluster statistics here in the case this
1048 * cylinder group is now almost full, and the remaining
1049 * space is less then the maximum cluster size. This is
1050 * probably not needed, as you would hardly find a file
1051 * system which has only MAXCSBUFS+FS_MAXCONTIG of free
1052 * space right behind the cylinder group information in
1053 * any new cylinder group.
1057 * Update our statistics in the cylinder summary.
1062 * 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 * Return mountpoint on which the device is currently mounted.
1268 static const struct statfs *
1269 dev_to_statfs(const char *dev)
1271 struct stat devstat, mntdevstat;
1272 struct statfs *mntbuf, *statfsp;
1273 char device[MAXPATHLEN];
1278 * First check the mounted filesystems.
1280 if (stat(dev, &devstat) != 0)
1282 if (!S_ISCHR(devstat.st_mode) && !S_ISBLK(devstat.st_mode))
1285 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
1286 for (i = 0; i < mntsize; i++) {
1287 statfsp = &mntbuf[i];
1288 mntdevname = statfsp->f_mntfromname;
1289 if (*mntdevname != '/') {
1290 strcpy(device, _PATH_DEV);
1291 strcat(device, mntdevname);
1292 mntdevname = device;
1294 if (stat(mntdevname, &mntdevstat) == 0 &&
1295 mntdevstat.st_rdev == devstat.st_rdev)
1303 mountpoint_to_dev(const char *mountpoint)
1305 struct statfs *mntbuf, *statfsp;
1310 * First check the mounted filesystems.
1312 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
1313 for (i = 0; i < mntsize; i++) {
1314 statfsp = &mntbuf[i];
1316 if (strcmp(statfsp->f_mntonname, mountpoint) == 0)
1317 return (statfsp->f_mntfromname);
1323 fs = getfsfile(mountpoint);
1325 return (fs->fs_spec);
1331 getdev(const char *name)
1333 static char device[MAXPATHLEN];
1334 const char *cp, *dev;
1339 cp = strrchr(name, '/');
1341 snprintf(device, sizeof(device), "%s%s", _PATH_DEV, name);
1346 dev = mountpoint_to_dev(name);
1347 if (dev != NULL && is_dev(dev))
1354 * growfs(8) is a utility which allows to increase the size of an existing
1355 * ufs file system. Currently this can only be done on unmounted file system.
1356 * It recognizes some command line options to specify the new desired size,
1357 * and it does some basic checkings. The old file system size is determined
1358 * and after some more checks like we can really access the new last block
1359 * on the disk etc. we calculate the new parameters for the superblock. After
1360 * having done this we just call growfs() which will do the work.
1361 * We still have to provide support for snapshots. Therefore we first have to
1362 * understand what data structures are always replicated in the snapshot on
1363 * creation, for all other blocks we touch during our procedure, we have to
1364 * keep the old blocks unchanged somewhere available for the snapshots. If we
1365 * are lucky, then we only have to handle our blocks to be relocated in that
1367 * Also we have to consider in what order we actually update the critical
1368 * data structures of the file system to make sure, that in case of a disaster
1369 * fsck(8) is still able to restore any lost data.
1370 * The foreseen last step then will be to provide for growing even mounted
1371 * file systems. There we have to extend the mount() system call to provide
1372 * userland access to the file system locking facility.
1375 main(int argc, char **argv)
1379 const struct statfs *statfsp;
1382 int error, i, j, fsi, fso, ch, Nflag = 0, yflag = 0;
1383 char *p, reply[5], oldsizebuf[6], newsizebuf[6];
1388 while ((ch = getopt(argc, argv, "Ns:vy")) != -1) {
1394 size = (off_t)strtoumax(optarg, &p, 0);
1395 if (p == NULL || *p == '\0')
1397 else if (*p == 'b' || *p == 'B')
1399 else if (*p == 'k' || *p == 'K')
1401 else if (*p == 'm' || *p == 'M')
1403 else if (*p == 'g' || *p == 'G')
1405 else if (*p == 't' || *p == 'T') {
1409 errx(1, "unknown suffix on -s argument");
1411 case 'v': /* for compatibility to newfs */
1429 * Now try to guess the device name.
1431 device = getdev(*argv);
1433 errx(1, "cannot find special device for %s", *argv);
1435 statfsp = dev_to_statfs(device);
1437 fsi = open(device, O_RDONLY);
1439 err(1, "%s", device);
1442 * Try to guess the slice size if not specified.
1444 if (ioctl(fsi, DIOCGMEDIASIZE, &mediasize) == -1)
1445 err(1,"DIOCGMEDIASIZE");
1448 * Check if that partition is suitable for growing a file system.
1451 errx(1, "partition is unavailable");
1454 * Read the current superblock, and take a backup.
1456 for (i = 0; sblock_try[i] != -1; i++) {
1457 sblockloc = sblock_try[i] / DEV_BSIZE;
1458 rdfs(sblockloc, (size_t)SBLOCKSIZE, (void *)&(osblock), fsi);
1459 if ((osblock.fs_magic == FS_UFS1_MAGIC ||
1460 (osblock.fs_magic == FS_UFS2_MAGIC &&
1461 osblock.fs_sblockloc == sblock_try[i])) &&
1462 osblock.fs_bsize <= MAXBSIZE &&
1463 osblock.fs_bsize >= (int32_t) sizeof(struct fs))
1466 if (sblock_try[i] == -1)
1467 errx(1, "superblock not recognized");
1468 memcpy((void *)&fsun1, (void *)&fsun2, sizeof(fsun2));
1470 DBG_OPEN("/tmp/growfs.debug"); /* already here we need a superblock */
1471 DBG_DUMP_FS(&sblock, "old sblock");
1474 * Determine size to grow to. Default to the device size.
1479 if (size > (uint64_t)mediasize) {
1480 humanize_number(oldsizebuf, sizeof(oldsizebuf), size,
1481 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1482 humanize_number(newsizebuf, sizeof(newsizebuf),
1484 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1486 errx(1, "requested size %s is larger "
1487 "than the available %s", oldsizebuf, newsizebuf);
1491 if (size <= (uint64_t)(osblock.fs_size * osblock.fs_fsize)) {
1492 humanize_number(oldsizebuf, sizeof(oldsizebuf),
1493 osblock.fs_size * osblock.fs_fsize,
1494 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1495 humanize_number(newsizebuf, sizeof(newsizebuf), size,
1496 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1498 errx(1, "requested size %s is not larger than the current "
1499 "filesystem size %s", newsizebuf, oldsizebuf);
1502 sblock.fs_size = dbtofsb(&osblock, size / DEV_BSIZE);
1505 * Are we really growing?
1507 if (osblock.fs_size >= sblock.fs_size) {
1508 errx(1, "we are not growing (%jd->%jd)",
1509 (intmax_t)osblock.fs_size, (intmax_t)sblock.fs_size);
1513 * Check if we find an active snapshot.
1516 for (j = 0; j < FSMAXSNAP; j++) {
1517 if (sblock.fs_snapinum[j]) {
1518 errx(1, "active snapshot found in file system; "
1519 "please remove all snapshots before "
1522 if (!sblock.fs_snapinum[j]) /* list is dense */
1527 if (yflag == 0 && Nflag == 0) {
1528 if (statfsp != NULL && (statfsp->f_flags & MNT_RDONLY) == 0)
1529 errx(1, "%s is mounted read-write on %s",
1530 statfsp->f_mntfromname, statfsp->f_mntonname);
1531 printf("It's strongly recommended to make a backup "
1532 "before growing the file system.\n"
1533 "OK to grow filesystem on %s", device);
1534 if (statfsp != NULL)
1535 printf(", mounted on %s,", statfsp->f_mntonname);
1536 humanize_number(oldsizebuf, sizeof(oldsizebuf),
1537 osblock.fs_size * osblock.fs_fsize,
1538 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1539 humanize_number(newsizebuf, sizeof(newsizebuf),
1540 sblock.fs_size * sblock.fs_fsize,
1541 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1542 printf(" from %s to %s? [Yes/No] ", oldsizebuf, newsizebuf);
1544 fgets(reply, (int)sizeof(reply), stdin);
1545 if (strcmp(reply, "Yes\n")){
1546 printf("\nNothing done\n");
1552 * Try to access our device for writing. If it's not mounted,
1553 * or mounted read-only, simply open it; otherwise, use UFS
1554 * suspension mechanism.
1559 fso = open(device, O_WRONLY);
1561 err(1, "%s", device);
1565 * Try to access our new last block in the file system.
1567 testbuf = malloc(sblock.fs_fsize);
1568 if (testbuf == NULL)
1570 rdfs((ufs2_daddr_t)((size - sblock.fs_fsize) / DEV_BSIZE),
1571 sblock.fs_fsize, testbuf, fsi);
1572 wtfs((ufs2_daddr_t)((size - sblock.fs_fsize) / DEV_BSIZE),
1573 sblock.fs_fsize, testbuf, fso, Nflag);
1577 * Now calculate new superblock values and check for reasonable
1578 * bound for new file system size:
1579 * fs_size: is derived from user input
1580 * fs_dsize: should get updated in the routines creating or
1581 * updating the cylinder groups on the fly
1582 * fs_cstotal: should get updated in the routines creating or
1583 * updating the cylinder groups
1587 * Update the number of cylinders and cylinder groups in the file system.
1589 if (sblock.fs_magic == FS_UFS1_MAGIC) {
1590 sblock.fs_old_ncyl =
1591 sblock.fs_size * sblock.fs_old_nspf / sblock.fs_old_spc;
1592 if (sblock.fs_size * sblock.fs_old_nspf >
1593 sblock.fs_old_ncyl * sblock.fs_old_spc)
1594 sblock.fs_old_ncyl++;
1596 sblock.fs_ncg = howmany(sblock.fs_size, sblock.fs_fpg);
1598 if (sblock.fs_size % sblock.fs_fpg != 0 &&
1599 sblock.fs_size % sblock.fs_fpg < cgdmin(&sblock, sblock.fs_ncg)) {
1601 * The space in the new last cylinder group is too small,
1605 if (sblock.fs_magic == FS_UFS1_MAGIC)
1606 sblock.fs_old_ncyl = sblock.fs_ncg * sblock.fs_old_cpg;
1607 printf("Warning: %jd sector(s) cannot be allocated.\n",
1608 (intmax_t)fsbtodb(&sblock, sblock.fs_size % sblock.fs_fpg));
1609 sblock.fs_size = sblock.fs_ncg * sblock.fs_fpg;
1613 * Update the space for the cylinder group summary information in the
1614 * respective cylinder group data area.
1617 fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum));
1619 if (osblock.fs_size >= sblock.fs_size)
1620 errx(1, "not enough new space");
1622 DBG_PRINT0("sblock calculated\n");
1625 * Ok, everything prepared, so now let's do the tricks.
1627 growfs(fsi, fso, Nflag);
1635 if (statfsp != NULL)
1636 mount_reload(statfsp);
1645 * Dump a line of usage.
1654 fprintf(stderr, "usage: growfs [-Ny] [-s size] special | filesystem\n");
1661 * This updates most parameters and the bitmap related to cluster. We have to
1662 * assume that sblock, osblock, acg are set up.
1672 if (sblock.fs_contigsumsize < 1) /* no clustering */
1675 * update cluster allocation map
1677 setbit(cg_clustersfree(&acg), block);
1680 * update cluster summary table
1684 * calculate size for the trailing cluster
1686 for (block--; lcs < sblock.fs_contigsumsize; block--, lcs++ ) {
1687 if (isclr(cg_clustersfree(&acg), block))
1691 if (lcs < sblock.fs_contigsumsize) {
1693 cg_clustersum(&acg)[lcs]--;
1695 cg_clustersum(&acg)[lcs]++;
1703 mount_reload(const struct statfs *stfs)
1712 build_iovec(&iov, &iovlen, "fstype", __DECONST(char *, "ffs"), 4);
1713 build_iovec(&iov, &iovlen, "fspath", __DECONST(char *, stfs->f_mntonname), (size_t)-1);
1714 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
1715 build_iovec(&iov, &iovlen, "update", NULL, 0);
1716 build_iovec(&iov, &iovlen, "reload", NULL, 0);
1718 if (nmount(iov, iovlen, stfs->f_flags) < 0) {
1719 errmsg[sizeof(errmsg) - 1] = '\0';
1720 err(9, "%s: cannot reload filesystem%s%s", stfs->f_mntonname,
1721 *errmsg != '\0' ? ": " : "", errmsg);