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;
304 static long iobufsize;
307 ufs2_daddr_t i, cbase, dmax;
308 struct ufs1_dinode *dp1;
309 struct ufs2_dinode *dp2;
311 uint j, d, dupper, dlower;
314 iobufsize = 2 * sblock.fs_bsize;
315 if ((iobuf = malloc(iobufsize)) == NULL)
316 errx(37, "panic: cannot allocate I/O buffer");
317 memset(iobuf, '\0', iobufsize);
320 * Determine block bounds for cylinder group.
321 * Allow space for super block summary information in first
324 cbase = cgbase(&sblock, cylno);
325 dmax = cbase + sblock.fs_fpg;
326 if (dmax > sblock.fs_size)
327 dmax = sblock.fs_size;
328 dlower = cgsblock(&sblock, cylno) - cbase;
329 dupper = cgdmin(&sblock, cylno) - cbase;
330 if (cylno == 0) /* XXX fscs may be relocated */
331 dupper += howmany(sblock.fs_cssize, sblock.fs_fsize);
333 memset(&acg, 0, sblock.fs_cgsize);
334 acg.cg_time = modtime;
335 acg.cg_magic = CG_MAGIC;
337 acg.cg_niblk = sblock.fs_ipg;
338 acg.cg_initediblk = MIN(sblock.fs_ipg, 2 * INOPB(&sblock));
339 acg.cg_ndblk = dmax - cbase;
340 if (sblock.fs_contigsumsize > 0)
341 acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag;
342 start = &acg.cg_space[0] - (u_char *)(&acg.cg_firstfield);
343 if (sblock.fs_magic == FS_UFS2_MAGIC) {
344 acg.cg_iusedoff = start;
346 acg.cg_old_ncyl = sblock.fs_old_cpg;
347 acg.cg_old_time = acg.cg_time;
349 acg.cg_old_niblk = acg.cg_niblk;
351 acg.cg_initediblk = 0;
352 acg.cg_old_btotoff = start;
353 acg.cg_old_boff = acg.cg_old_btotoff +
354 sblock.fs_old_cpg * sizeof(int32_t);
355 acg.cg_iusedoff = acg.cg_old_boff +
356 sblock.fs_old_cpg * sizeof(u_int16_t);
358 acg.cg_freeoff = acg.cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT);
359 acg.cg_nextfreeoff = acg.cg_freeoff + howmany(sblock.fs_fpg, CHAR_BIT);
360 if (sblock.fs_contigsumsize > 0) {
361 acg.cg_clustersumoff =
362 roundup(acg.cg_nextfreeoff, sizeof(u_int32_t));
363 acg.cg_clustersumoff -= sizeof(u_int32_t);
364 acg.cg_clusteroff = acg.cg_clustersumoff +
365 (sblock.fs_contigsumsize + 1) * sizeof(u_int32_t);
366 acg.cg_nextfreeoff = acg.cg_clusteroff +
367 howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT);
369 if (acg.cg_nextfreeoff > (unsigned)sblock.fs_cgsize) {
371 * This should never happen as we would have had that panic
372 * already on file system creation
374 errx(37, "panic: cylinder group too big");
376 acg.cg_cs.cs_nifree += sblock.fs_ipg;
378 for (ino = 0; ino < UFS_ROOTINO; ino++) {
379 setbit(cg_inosused(&acg), ino);
380 acg.cg_cs.cs_nifree--;
383 * Initialize the initial inode blocks.
385 dp1 = (struct ufs1_dinode *)(void *)iobuf;
386 dp2 = (struct ufs2_dinode *)(void *)iobuf;
387 for (i = 0; i < acg.cg_initediblk; i++) {
388 if (sblock.fs_magic == FS_UFS1_MAGIC) {
389 dp1->di_gen = arc4random();
392 dp2->di_gen = arc4random();
396 wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno)), iobufsize, iobuf,
399 * For the old file system, we have to initialize all the inodes.
401 if (sblock.fs_magic == FS_UFS1_MAGIC &&
402 sblock.fs_ipg > 2 * INOPB(&sblock)) {
403 for (i = 2 * sblock.fs_frag;
404 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 = arc4random();
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 sblock.fs_old_dsize = sblock.fs_dsize;
431 if ((i = dupper % sblock.fs_frag)) {
432 acg.cg_frsum[sblock.fs_frag - i]++;
433 for (d = dupper + sblock.fs_frag - i; dupper < d; dupper++) {
434 setbit(cg_blksfree(&acg), dupper);
435 acg.cg_cs.cs_nffree++;
438 for (d = dupper; d + sblock.fs_frag <= acg.cg_ndblk;
439 d += sblock.fs_frag) {
440 blkno = d / sblock.fs_frag;
441 setblock(&sblock, cg_blksfree(&acg), blkno);
442 if (sblock.fs_contigsumsize > 0)
443 setbit(cg_clustersfree(&acg), blkno);
444 acg.cg_cs.cs_nbfree++;
446 if (d < acg.cg_ndblk) {
447 acg.cg_frsum[acg.cg_ndblk - d]++;
448 for (; d < acg.cg_ndblk; d++) {
449 setbit(cg_blksfree(&acg), d);
450 acg.cg_cs.cs_nffree++;
453 if (sblock.fs_contigsumsize > 0) {
454 int32_t *sump = cg_clustersum(&acg);
455 u_char *mapp = cg_clustersfree(&acg);
460 for (i = 0; i < acg.cg_nclusterblks; i++) {
461 if ((map & bit) != 0)
464 if (run > sblock.fs_contigsumsize)
465 run = sblock.fs_contigsumsize;
469 if ((i & (CHAR_BIT - 1)) != CHAR_BIT - 1)
477 if (run > sblock.fs_contigsumsize)
478 run = sblock.fs_contigsumsize;
482 sblock.fs_cstotal.cs_ndir += acg.cg_cs.cs_ndir;
483 sblock.fs_cstotal.cs_nffree += acg.cg_cs.cs_nffree;
484 sblock.fs_cstotal.cs_nbfree += acg.cg_cs.cs_nbfree;
485 sblock.fs_cstotal.cs_nifree += acg.cg_cs.cs_nifree;
489 wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)), sblock.fs_cgsize, &acg,
491 DBG_DUMP_CG(&sblock, "new cg", &acg);
498 * Here we add or subtract (sign +1/-1) the available fragments in a given
499 * block to or from the fragment statistics. By subtracting before and adding
500 * after an operation on the free frag map we can easy update the fragment
501 * statistic, which seems to be otherwise a rather complex operation.
504 frag_adjust(ufs2_daddr_t frag, int sign)
506 DBG_FUNC("frag_adjust")
514 * Here frag only needs to point to any fragment in the block we want
517 for (f = rounddown(frag, sblock.fs_frag);
518 f < roundup(frag + 1, sblock.fs_frag); f++) {
520 * Count contiguous free fragments.
522 if (isset(cg_blksfree(&acg), f)) {
525 if (fragsize && fragsize < sblock.fs_frag) {
527 * We found something in between.
529 acg.cg_frsum[fragsize] += sign;
530 DBG_PRINT2("frag_adjust [%d]+=%d\n",
536 if (fragsize && fragsize < sblock.fs_frag) {
538 * We found something.
540 acg.cg_frsum[fragsize] += sign;
541 DBG_PRINT2("frag_adjust [%d]+=%d\n", fragsize, sign);
543 DBG_PRINT2("frag_adjust [[%d]]+=%d\n", fragsize, sign);
550 * Here we do all needed work for the former last cylinder group. It has to be
551 * changed in any case, even if the file system ended exactly on the end of
552 * this group, as there is some slightly inconsistent handling of the number
553 * of cylinders in the cylinder group. We start again by reading the cylinder
554 * group from disk. If the last block was not fully available, we first handle
555 * the missing fragments, then we handle all new full blocks in that file
556 * system and finally we handle the new last fragmented block in the file
557 * system. We again have to handle the fragment statistics rotational layout
558 * tables and cluster summary during all those operations.
561 updjcg(int cylno, time_t modtime, int fsi, int fso, unsigned int Nflag)
564 ufs2_daddr_t cbase, dmax;
572 * Read the former last (joining) cylinder group from disk, and make
575 rdfs(fsbtodb(&osblock, cgtod(&osblock, cylno)),
576 (size_t)osblock.fs_cgsize, (void *)&aocg, fsi);
577 DBG_PRINT0("jcg read\n");
578 DBG_DUMP_CG(&sblock, "old joining cg", &aocg);
580 memcpy((void *)&cgun1, (void *)&cgun2, sizeof(cgun2));
583 * If the cylinder group had already its new final size almost
584 * nothing is to be done ... except:
585 * For some reason the value of cg_ncyl in the last cylinder group has
586 * to be zero instead of fs_cpg. As this is now no longer the last
587 * cylinder group we have to change that value now to fs_cpg.
590 if (cgbase(&osblock, cylno + 1) == osblock.fs_size) {
591 if (sblock.fs_magic == FS_UFS1_MAGIC)
592 acg.cg_old_ncyl = sblock.fs_old_cpg;
595 wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)),
596 (size_t)sblock.fs_cgsize, (void *)&acg, fso, Nflag);
597 DBG_PRINT0("jcg written\n");
598 DBG_DUMP_CG(&sblock, "new joining cg", &acg);
605 * Set up some variables needed later.
607 cbase = cgbase(&sblock, cylno);
608 dmax = cbase + sblock.fs_fpg;
609 if (dmax > sblock.fs_size)
610 dmax = sblock.fs_size;
613 * Set pointer to the cylinder summary for our cylinder group.
618 * Touch the cylinder group, update all fields in the cylinder group as
619 * needed, update the free space in the superblock.
621 acg.cg_time = modtime;
622 if ((unsigned)cylno == sblock.fs_ncg - 1) {
624 * This is still the last cylinder group.
626 if (sblock.fs_magic == FS_UFS1_MAGIC)
628 sblock.fs_old_ncyl % sblock.fs_old_cpg;
630 acg.cg_old_ncyl = sblock.fs_old_cpg;
632 DBG_PRINT2("jcg dbg: %d %u", cylno, sblock.fs_ncg);
634 if (sblock.fs_magic == FS_UFS1_MAGIC)
635 DBG_PRINT2("%d %u", acg.cg_old_ncyl, sblock.fs_old_cpg);
638 acg.cg_ndblk = dmax - cbase;
639 sblock.fs_dsize += acg.cg_ndblk - aocg.cg_ndblk;
640 sblock.fs_old_dsize = sblock.fs_dsize;
641 if (sblock.fs_contigsumsize > 0)
642 acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag;
645 * Now we have to update the free fragment bitmap for our new free
646 * space. There again we have to handle the fragmentation and also
647 * the rotational layout tables and the cluster summary. This is
648 * also done per fragment for the first new block if the old file
649 * system end was not on a block boundary, per fragment for the new
650 * last block if the new file system end is not on a block boundary,
651 * and per block for all space in between.
653 * Handle the first new block here if it was partially available
656 if (osblock.fs_size % sblock.fs_frag) {
657 if (roundup(osblock.fs_size, sblock.fs_frag) <=
660 * The new space is enough to fill at least this
664 for (i = roundup(osblock.fs_size - cbase,
665 sblock.fs_frag) - 1; i >= osblock.fs_size - cbase;
667 setbit(cg_blksfree(&acg), i);
668 acg.cg_cs.cs_nffree++;
673 * Check if the fragment just created could join an
674 * already existing fragment at the former end of the
677 if (isblock(&sblock, cg_blksfree(&acg),
678 ((osblock.fs_size - cgbase(&sblock, cylno)) /
681 * The block is now completely available.
683 DBG_PRINT0("block was\n");
684 acg.cg_frsum[osblock.fs_size % sblock.fs_frag]--;
685 acg.cg_cs.cs_nbfree++;
686 acg.cg_cs.cs_nffree -= sblock.fs_frag;
687 k = rounddown(osblock.fs_size - cbase,
689 updclst((osblock.fs_size - cbase) /
693 * Lets rejoin a possible partially growed
697 while (isset(cg_blksfree(&acg), i) &&
698 (i >= rounddown(osblock.fs_size - cbase,
705 acg.cg_frsum[k + j]++;
709 * We only grow by some fragments within this last
712 for (i = sblock.fs_size - cbase - 1;
713 i >= osblock.fs_size - cbase; i--) {
714 setbit(cg_blksfree(&acg), i);
715 acg.cg_cs.cs_nffree++;
719 * Lets rejoin a possible partially growed fragment.
722 while (isset(cg_blksfree(&acg), i) &&
723 (i >= rounddown(osblock.fs_size - cbase,
730 acg.cg_frsum[k + j]++;
735 * Handle all new complete blocks here.
737 for (i = roundup(osblock.fs_size - cbase, sblock.fs_frag);
738 i + sblock.fs_frag <= dmax - cbase; /* XXX <= or only < ? */
739 i += sblock.fs_frag) {
740 j = i / sblock.fs_frag;
741 setblock(&sblock, cg_blksfree(&acg), j);
743 acg.cg_cs.cs_nbfree++;
747 * Handle the last new block if there are stll some new fragments left.
748 * Here we don't have to bother about the cluster summary or the even
749 * the rotational layout table.
751 if (i < (dmax - cbase)) {
752 acg.cg_frsum[dmax - cbase - i]++;
753 for (; i < dmax - cbase; i++) {
754 setbit(cg_blksfree(&acg), i);
755 acg.cg_cs.cs_nffree++;
759 sblock.fs_cstotal.cs_nffree +=
760 (acg.cg_cs.cs_nffree - aocg.cg_cs.cs_nffree);
761 sblock.fs_cstotal.cs_nbfree +=
762 (acg.cg_cs.cs_nbfree - aocg.cg_cs.cs_nbfree);
764 * The following statistics are not changed here:
765 * sblock.fs_cstotal.cs_ndir
766 * sblock.fs_cstotal.cs_nifree
767 * As the statistics for this cylinder group are ready, copy it to
768 * the summary information array.
773 * Write the updated "joining" cylinder group back to disk.
776 wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)), (size_t)sblock.fs_cgsize,
777 (void *)&acg, fso, Nflag);
778 DBG_PRINT0("jcg written\n");
779 DBG_DUMP_CG(&sblock, "new joining cg", &acg);
786 * Here we update the location of the cylinder summary. We have two possible
787 * ways of growing the cylinder summary:
788 * (1) We can try to grow the summary in the current location, and relocate
789 * possibly used blocks within the current cylinder group.
790 * (2) Alternatively we can relocate the whole cylinder summary to the first
791 * new completely empty cylinder group. Once the cylinder summary is no
792 * longer in the beginning of the first cylinder group you should never
793 * use a version of fsck which is not aware of the possibility to have
794 * this structure in a non standard place.
795 * Option (2) is considered to be less intrusive to the structure of the file-
796 * system, so that's the one being used.
799 updcsloc(time_t modtime, int fsi, int fso, unsigned int Nflag)
810 if (howmany(sblock.fs_cssize, sblock.fs_fsize) ==
811 howmany(osblock.fs_cssize, osblock.fs_fsize)) {
813 * No new fragment needed.
818 /* Adjust fs_dsize by added summary blocks */
819 sblock.fs_dsize -= howmany(sblock.fs_cssize, sblock.fs_fsize) -
820 howmany(osblock.fs_cssize, osblock.fs_fsize);
821 sblock.fs_old_dsize = sblock.fs_dsize;
822 ocscg = dtog(&osblock, osblock.fs_csaddr);
826 * Read original cylinder group from disk, and make a copy.
827 * XXX If Nflag is set in some very rare cases we now miss
828 * some changes done in updjcg by reading the unmodified
831 rdfs(fsbtodb(&osblock, cgtod(&osblock, ocscg)),
832 (size_t)osblock.fs_cgsize, (void *)&aocg, fsi);
833 DBG_PRINT0("oscg read\n");
834 DBG_DUMP_CG(&sblock, "old summary cg", &aocg);
836 memcpy((void *)&cgun1, (void *)&cgun2, sizeof(cgun2));
839 * Touch the cylinder group, set up local variables needed later
840 * and update the superblock.
842 acg.cg_time = modtime;
845 * XXX In the case of having active snapshots we may need much more
846 * blocks for the copy on write. We need each block twice, and
847 * also up to 8*3 blocks for indirect blocks for all possible
851 * There is not enough space in the old cylinder group to
852 * relocate all blocks as needed, so we relocate the whole
853 * cylinder group summary to a new group. We try to use the
854 * first complete new cylinder group just created. Within the
855 * cylinder group we align the area immediately after the
856 * cylinder group information location in order to be as
857 * close as possible to the original implementation of ffs.
859 * First we have to make sure we'll find enough space in the
860 * new cylinder group. If not, then we currently give up.
861 * We start with freeing everything which was used by the
862 * fragments of the old cylinder summary in the current group.
863 * Now we write back the group meta data, read in the needed
864 * meta data from the new cylinder group, and start allocating
865 * within that group. Here we can assume, the group to be
866 * completely empty. Which makes the handling of fragments and
867 * clusters a lot easier.
870 if (sblock.fs_ncg - osblock.fs_ncg < 2)
871 errx(2, "panic: not enough space");
874 * Point "d" to the first fragment not used by the cylinder
877 d = osblock.fs_csaddr + (osblock.fs_cssize / osblock.fs_fsize);
880 * Set up last cluster size ("lcs") already here. Calculate
881 * the size for the trailing cluster just behind where "d"
884 if (sblock.fs_contigsumsize > 0) {
885 for (block = howmany(d % sblock.fs_fpg, sblock.fs_frag),
886 lcs = 0; lcs < sblock.fs_contigsumsize; block++, lcs++) {
887 if (isclr(cg_clustersfree(&acg), block))
893 * Point "d" to the last frag used by the cylinder summary.
897 DBG_PRINT1("d=%jd\n", (intmax_t)d);
898 if ((d + 1) % sblock.fs_frag) {
900 * The end of the cylinder summary is not a complete
904 frag_adjust(d % sblock.fs_fpg, -1);
905 for (; (d + 1) % sblock.fs_frag; d--) {
906 DBG_PRINT1("d=%jd\n", (intmax_t)d);
907 setbit(cg_blksfree(&acg), d % sblock.fs_fpg);
908 acg.cg_cs.cs_nffree++;
909 sblock.fs_cstotal.cs_nffree++;
912 * Point "d" to the last fragment of the last
913 * (incomplete) block of the cylinder summary.
916 frag_adjust(d % sblock.fs_fpg, 1);
918 if (isblock(&sblock, cg_blksfree(&acg),
919 (d % sblock.fs_fpg) / sblock.fs_frag)) {
920 DBG_PRINT1("d=%jd\n", (intmax_t)d);
921 acg.cg_cs.cs_nffree -= sblock.fs_frag;
922 acg.cg_cs.cs_nbfree++;
923 sblock.fs_cstotal.cs_nffree -= sblock.fs_frag;
924 sblock.fs_cstotal.cs_nbfree++;
925 if (sblock.fs_contigsumsize > 0) {
926 setbit(cg_clustersfree(&acg),
927 (d % sblock.fs_fpg) / sblock.fs_frag);
928 if (lcs < sblock.fs_contigsumsize) {
930 cg_clustersum(&acg)[lcs]--;
932 cg_clustersum(&acg)[lcs]++;
937 * Point "d" to the first fragment of the block before
938 * the last incomplete block.
943 DBG_PRINT1("d=%jd\n", (intmax_t)d);
944 for (d = rounddown(d, sblock.fs_frag); d >= osblock.fs_csaddr;
945 d -= sblock.fs_frag) {
947 DBG_PRINT1("d=%jd\n", (intmax_t)d);
948 setblock(&sblock, cg_blksfree(&acg),
949 (d % sblock.fs_fpg) / sblock.fs_frag);
950 acg.cg_cs.cs_nbfree++;
951 sblock.fs_cstotal.cs_nbfree++;
952 if (sblock.fs_contigsumsize > 0) {
953 setbit(cg_clustersfree(&acg),
954 (d % sblock.fs_fpg) / sblock.fs_frag);
956 * The last cluster size is already set up.
958 if (lcs < sblock.fs_contigsumsize) {
960 cg_clustersum(&acg)[lcs]--;
962 cg_clustersum(&acg)[lcs]++;
969 * Now write the former cylinder group containing the cylinder
970 * 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
1066 wtfs(fsbtodb(&sblock, cgtod(&sblock, ncscg)),
1067 (size_t)sblock.fs_cgsize, (void *)&acg, fso, Nflag);
1068 DBG_PRINT0("nscg written\n");
1069 DBG_DUMP_CG(&sblock, "new summary cg", &acg);
1076 * Here we read some block(s) from disk.
1079 rdfs(ufs2_daddr_t bno, size_t size, void *bf, int fsi)
1087 err(32, "rdfs: attempting to read negative block number");
1088 if (lseek(fsi, (off_t)bno * DEV_BSIZE, 0) < 0)
1089 err(33, "rdfs: seek error: %jd", (intmax_t)bno);
1090 n = read(fsi, bf, size);
1091 if (n != (ssize_t)size)
1092 err(34, "rdfs: read error: %jd", (intmax_t)bno);
1099 * Here we write some block(s) to disk.
1102 wtfs(ufs2_daddr_t bno, size_t size, void *bf, int fso, unsigned int Nflag)
1113 if (lseek(fso, (off_t)bno * DEV_BSIZE, SEEK_SET) < 0)
1114 err(35, "wtfs: seek error: %ld", (long)bno);
1115 n = write(fso, bf, size);
1116 if (n != (ssize_t)size)
1117 err(36, "wtfs: write error: %ld", (long)bno);
1124 * Here we check if all frags of a block are free. For more details again
1125 * please see the source of newfs(8), as this function is taken over almost
1129 isblock(struct fs *fs, unsigned char *cp, int h)
1136 switch (fs->fs_frag) {
1139 return (cp[h] == 0xff);
1141 mask = 0x0f << ((h & 0x1) << 2);
1143 return ((cp[h >> 1] & mask) == mask);
1145 mask = 0x03 << ((h & 0x3) << 1);
1147 return ((cp[h >> 2] & mask) == mask);
1149 mask = 0x01 << (h & 0x7);
1151 return ((cp[h >> 3] & mask) == mask);
1153 fprintf(stderr, "isblock bad fs_frag %d\n", fs->fs_frag);
1160 * Here we allocate a complete block in the block map. For more details again
1161 * please see the source of newfs(8), as this function is taken over almost
1165 clrblock(struct fs *fs, unsigned char *cp, int h)
1167 DBG_FUNC("clrblock")
1171 switch ((fs)->fs_frag) {
1176 cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2));
1179 cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1));
1182 cp[h >> 3] &= ~(0x01 << (h & 0x7));
1185 warnx("clrblock bad fs_frag %d", fs->fs_frag);
1194 * Here we free a complete block in the free block map. For more details again
1195 * please see the source of newfs(8), as this function is taken over almost
1199 setblock(struct fs *fs, unsigned char *cp, int h)
1201 DBG_FUNC("setblock")
1205 switch (fs->fs_frag) {
1210 cp[h >> 1] |= (0x0f << ((h & 0x1) << 2));
1213 cp[h >> 2] |= (0x03 << ((h & 0x3) << 1));
1216 cp[h >> 3] |= (0x01 << (h & 0x7));
1219 warnx("setblock bad fs_frag %d", fs->fs_frag);
1228 * Figure out how many lines our current terminal has. For more details again
1229 * please see the source of newfs(8), as this function is taken over almost
1235 DBG_FUNC("charsperline")
1243 if (ioctl(0, TIOCGWINSZ, &ws) != -1)
1244 columns = ws.ws_col;
1245 if (columns == 0 && (cp = getenv("COLUMNS")))
1248 columns = 80; /* last resort */
1255 is_dev(const char *name)
1257 struct stat devstat;
1259 if (stat(name, &devstat) != 0)
1261 if (!S_ISCHR(devstat.st_mode))
1267 * Return mountpoint on which the device is currently mounted.
1269 static const struct statfs *
1270 dev_to_statfs(const char *dev)
1272 struct stat devstat, mntdevstat;
1273 struct statfs *mntbuf, *statfsp;
1274 char device[MAXPATHLEN];
1279 * First check the mounted filesystems.
1281 if (stat(dev, &devstat) != 0)
1283 if (!S_ISCHR(devstat.st_mode) && !S_ISBLK(devstat.st_mode))
1286 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
1287 for (i = 0; i < mntsize; i++) {
1288 statfsp = &mntbuf[i];
1289 mntdevname = statfsp->f_mntfromname;
1290 if (*mntdevname != '/') {
1291 strcpy(device, _PATH_DEV);
1292 strcat(device, mntdevname);
1293 mntdevname = device;
1295 if (stat(mntdevname, &mntdevstat) == 0 &&
1296 mntdevstat.st_rdev == devstat.st_rdev)
1304 mountpoint_to_dev(const char *mountpoint)
1306 struct statfs *mntbuf, *statfsp;
1311 * First check the mounted filesystems.
1313 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
1314 for (i = 0; i < mntsize; i++) {
1315 statfsp = &mntbuf[i];
1317 if (strcmp(statfsp->f_mntonname, mountpoint) == 0)
1318 return (statfsp->f_mntfromname);
1324 fs = getfsfile(mountpoint);
1326 return (fs->fs_spec);
1332 getdev(const char *name)
1334 static char device[MAXPATHLEN];
1335 const char *cp, *dev;
1340 cp = strrchr(name, '/');
1342 snprintf(device, sizeof(device), "%s%s", _PATH_DEV, name);
1347 dev = mountpoint_to_dev(name);
1348 if (dev != NULL && is_dev(dev))
1355 * growfs(8) is a utility which allows to increase the size of an existing
1356 * ufs file system. Currently this can only be done on unmounted file system.
1357 * It recognizes some command line options to specify the new desired size,
1358 * and it does some basic checkings. The old file system size is determined
1359 * and after some more checks like we can really access the new last block
1360 * on the disk etc. we calculate the new parameters for the superblock. After
1361 * having done this we just call growfs() which will do the work.
1362 * We still have to provide support for snapshots. Therefore we first have to
1363 * understand what data structures are always replicated in the snapshot on
1364 * creation, for all other blocks we touch during our procedure, we have to
1365 * keep the old blocks unchanged somewhere available for the snapshots. If we
1366 * are lucky, then we only have to handle our blocks to be relocated in that
1368 * Also we have to consider in what order we actually update the critical
1369 * data structures of the file system to make sure, that in case of a disaster
1370 * fsck(8) is still able to restore any lost data.
1371 * The foreseen last step then will be to provide for growing even mounted
1372 * file systems. There we have to extend the mount() system call to provide
1373 * userland access to the file system locking facility.
1376 main(int argc, char **argv)
1381 const struct statfs *statfsp;
1384 int error, j, fsi, fso, ch, ret, Nflag = 0, yflag = 0;
1385 char *p, reply[5], oldsizebuf[6], newsizebuf[6];
1390 while ((ch = getopt(argc, argv, "Ns:vy")) != -1) {
1396 size = (off_t)strtoumax(optarg, &p, 0);
1397 if (p == NULL || *p == '\0')
1399 else if (*p == 'b' || *p == 'B')
1401 else if (*p == 'k' || *p == 'K')
1403 else if (*p == 'm' || *p == 'M')
1405 else if (*p == 'g' || *p == 'G')
1407 else if (*p == 't' || *p == 'T') {
1411 errx(1, "unknown suffix on -s argument");
1413 case 'v': /* for compatibility to newfs */
1431 * Now try to guess the device name.
1433 device = getdev(*argv);
1435 errx(1, "cannot find special device for %s", *argv);
1437 statfsp = dev_to_statfs(device);
1439 fsi = open(device, O_RDONLY);
1441 err(1, "%s", device);
1444 * Try to guess the slice size if not specified.
1446 if (ioctl(fsi, DIOCGMEDIASIZE, &mediasize) == -1)
1447 err(1,"DIOCGMEDIASIZE");
1450 * Check if that partition is suitable for growing a file system.
1453 errx(1, "partition is unavailable");
1456 * Read the current superblock, and take a backup.
1458 if ((ret = sbget(fsi, &fs, STDSB)) != 0) {
1461 errx(1, "superblock not recognized");
1463 errc(1, ret, "unable to read superblock");
1467 * Check for filesystem that was unclean at mount time.
1469 if ((fs->fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) != 0)
1470 errx(1, "%s is not clean - run fsck.\n", *argv);
1471 memcpy(&osblock, fs, fs->fs_sbsize);
1473 memcpy((void *)&fsun1, (void *)&fsun2, osblock.fs_sbsize);
1475 DBG_OPEN("/tmp/growfs.debug"); /* already here we need a superblock */
1476 DBG_DUMP_FS(&sblock, "old sblock");
1479 * Determine size to grow to. Default to the device size.
1484 if (size > (uint64_t)mediasize) {
1485 humanize_number(oldsizebuf, sizeof(oldsizebuf), size,
1486 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1487 humanize_number(newsizebuf, sizeof(newsizebuf),
1489 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1491 errx(1, "requested size %s is larger "
1492 "than the available %s", oldsizebuf, newsizebuf);
1497 * Make sure the new size is a multiple of fs_fsize; /dev/ufssuspend
1498 * only supports fragment-aligned IO requests.
1500 size -= size % osblock.fs_fsize;
1502 if (size <= (uint64_t)(osblock.fs_size * osblock.fs_fsize)) {
1503 humanize_number(oldsizebuf, sizeof(oldsizebuf),
1504 osblock.fs_size * osblock.fs_fsize,
1505 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1506 humanize_number(newsizebuf, sizeof(newsizebuf), size,
1507 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1509 if (size == (uint64_t)(osblock.fs_size * osblock.fs_fsize))
1510 errx(0, "requested size %s is equal to the current "
1511 "filesystem size %s", newsizebuf, oldsizebuf);
1512 errx(1, "requested size %s is smaller than the current "
1513 "filesystem size %s", newsizebuf, oldsizebuf);
1516 sblock.fs_old_size = sblock.fs_size =
1517 dbtofsb(&osblock, size / DEV_BSIZE);
1518 sblock.fs_providersize = dbtofsb(&osblock, mediasize / DEV_BSIZE);
1521 * Are we really growing?
1523 if (osblock.fs_size >= sblock.fs_size) {
1524 errx(1, "we are not growing (%jd->%jd)",
1525 (intmax_t)osblock.fs_size, (intmax_t)sblock.fs_size);
1529 * Check if we find an active snapshot.
1532 for (j = 0; j < FSMAXSNAP; j++) {
1533 if (sblock.fs_snapinum[j]) {
1534 errx(1, "active snapshot found in file system; "
1535 "please remove all snapshots before "
1538 if (!sblock.fs_snapinum[j]) /* list is dense */
1543 if (yflag == 0 && Nflag == 0) {
1544 if (statfsp != NULL && (statfsp->f_flags & MNT_RDONLY) == 0)
1545 printf("Device is mounted read-write; resizing will "
1546 "result in temporary write suspension for %s.\n",
1547 statfsp->f_mntonname);
1548 printf("It's strongly recommended to make a backup "
1549 "before growing the file system.\n"
1550 "OK to grow filesystem on %s", device);
1551 if (statfsp != NULL)
1552 printf(", mounted on %s,", statfsp->f_mntonname);
1553 humanize_number(oldsizebuf, sizeof(oldsizebuf),
1554 osblock.fs_size * osblock.fs_fsize,
1555 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1556 humanize_number(newsizebuf, sizeof(newsizebuf),
1557 sblock.fs_size * sblock.fs_fsize,
1558 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1559 printf(" from %s to %s? [yes/no] ", oldsizebuf, newsizebuf);
1561 fgets(reply, (int)sizeof(reply), stdin);
1562 if (strcasecmp(reply, "yes\n")){
1563 printf("Response other than \"yes\"; aborting\n");
1569 * Try to access our device for writing. If it's not mounted,
1570 * or mounted read-only, simply open it; otherwise, use UFS
1571 * suspension mechanism.
1576 if (statfsp != NULL && (statfsp->f_flags & MNT_RDONLY) == 0) {
1577 fso = open(_PATH_UFSSUSPEND, O_RDWR);
1579 err(1, "unable to open %s", _PATH_UFSSUSPEND);
1580 error = ioctl(fso, UFSSUSPEND, &statfsp->f_fsid);
1582 err(1, "UFSSUSPEND");
1584 fso = open(device, O_WRONLY);
1586 err(1, "%s", device);
1591 * Try to access our new last block in the file system.
1593 testbuf = malloc(sblock.fs_fsize);
1594 if (testbuf == NULL)
1596 rdfs((ufs2_daddr_t)((size - sblock.fs_fsize) / DEV_BSIZE),
1597 sblock.fs_fsize, testbuf, fsi);
1598 wtfs((ufs2_daddr_t)((size - sblock.fs_fsize) / DEV_BSIZE),
1599 sblock.fs_fsize, testbuf, fso, Nflag);
1603 * Now calculate new superblock values and check for reasonable
1604 * bound for new file system size:
1605 * fs_size: is derived from user input
1606 * fs_dsize: should get updated in the routines creating or
1607 * updating the cylinder groups on the fly
1608 * fs_cstotal: should get updated in the routines creating or
1609 * updating the cylinder groups
1613 * Update the number of cylinders and cylinder groups in the file system.
1615 if (sblock.fs_magic == FS_UFS1_MAGIC) {
1616 sblock.fs_old_ncyl =
1617 sblock.fs_size * sblock.fs_old_nspf / sblock.fs_old_spc;
1618 if (sblock.fs_size * sblock.fs_old_nspf >
1619 sblock.fs_old_ncyl * sblock.fs_old_spc)
1620 sblock.fs_old_ncyl++;
1622 sblock.fs_ncg = howmany(sblock.fs_size, sblock.fs_fpg);
1625 * Allocate last cylinder group only if there is enough room
1626 * for at least one data block.
1628 if (sblock.fs_size % sblock.fs_fpg != 0 &&
1629 sblock.fs_size <= cgdmin(&sblock, sblock.fs_ncg - 1)) {
1630 humanize_number(oldsizebuf, sizeof(oldsizebuf),
1631 (sblock.fs_size % sblock.fs_fpg) * sblock.fs_fsize,
1632 "B", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
1633 warnx("no room to allocate last cylinder group; "
1634 "leaving %s unused", oldsizebuf);
1636 if (sblock.fs_magic == FS_UFS1_MAGIC)
1637 sblock.fs_old_ncyl = sblock.fs_ncg * sblock.fs_old_cpg;
1638 sblock.fs_old_size = sblock.fs_size =
1639 sblock.fs_ncg * sblock.fs_fpg;
1643 * Update the space for the cylinder group summary information in the
1644 * respective cylinder group data area.
1647 fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum));
1649 if (osblock.fs_size >= sblock.fs_size)
1650 errx(1, "not enough new space");
1652 DBG_PRINT0("sblock calculated\n");
1655 * Ok, everything prepared, so now let's do the tricks.
1657 growfs(fsi, fso, Nflag);
1661 if (statfsp != NULL && (statfsp->f_flags & MNT_RDONLY) == 0) {
1662 error = ioctl(fso, UFSRESUME);
1664 err(1, "UFSRESUME");
1669 if (statfsp != NULL && (statfsp->f_flags & MNT_RDONLY) != 0)
1670 mount_reload(statfsp);
1680 * Dump a line of usage.
1689 fprintf(stderr, "usage: growfs [-Ny] [-s size] special | filesystem\n");
1696 * This updates most parameters and the bitmap related to cluster. We have to
1697 * assume that sblock, osblock, acg are set up.
1707 if (sblock.fs_contigsumsize < 1) /* no clustering */
1710 * update cluster allocation map
1712 setbit(cg_clustersfree(&acg), block);
1715 * update cluster summary table
1719 * calculate size for the trailing cluster
1721 for (block--; lcs < sblock.fs_contigsumsize; block--, lcs++ ) {
1722 if (isclr(cg_clustersfree(&acg), block))
1726 if (lcs < sblock.fs_contigsumsize) {
1728 cg_clustersum(&acg)[lcs]--;
1730 cg_clustersum(&acg)[lcs]++;
1738 mount_reload(const struct statfs *stfs)
1747 build_iovec(&iov, &iovlen, "fstype", __DECONST(char *, "ffs"), 4);
1748 build_iovec(&iov, &iovlen, "fspath", __DECONST(char *, stfs->f_mntonname), (size_t)-1);
1749 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
1750 build_iovec(&iov, &iovlen, "update", NULL, 0);
1751 build_iovec(&iov, &iovlen, "reload", NULL, 0);
1753 if (nmount(iov, iovlen, stfs->f_flags) < 0) {
1754 errmsg[sizeof(errmsg) - 1] = '\0';
1755 err(9, "%s: cannot reload filesystem%s%s", stfs->f_mntonname,
1756 *errmsg != '\0' ? ": " : "", errmsg);
1761 * Calculate the check-hash of the cylinder group.
1764 cgckhash(struct cg *cgp)
1767 if ((sblock.fs_metackhash & CK_CYLGRP) == 0)
1770 cgp->cg_ckhash = calculate_crc32c(~0L, (void *)cgp, sblock.fs_cgsize);