2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1980, 1986, 1993
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34 static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95";
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
40 #include <sys/param.h>
44 #include <sys/disklabel.h>
46 #include <sys/sysctl.h>
48 #include <ufs/ufs/dinode.h>
49 #include <ufs/ffs/fs.h>
61 struct inoinfo **inphead, **inpsort; /* info about all inodes */
64 #define altsblock (*asblk.b_un.b_fs)
65 #define POWEROF2(num) (((num) & ((num) - 1)) == 0)
67 static int calcsb(char *dev, int devfd, struct fs *fs);
68 static void saverecovery(int readfd, int writefd);
69 static int chkrecovery(int devfd);
72 * Read in a superblock finding an alternate if necessary.
73 * Return 1 if successful, 0 if unsuccessful, -1 if file system
74 * is already clean (ckclean and preen mode only).
88 if (stat(dev, &statb) < 0) {
89 printf("Can't stat %s: %s\n", dev, strerror(errno));
96 if ((statb.st_mode & S_IFMT) != S_IFCHR &&
97 (statb.st_mode & S_IFMT) != S_IFBLK) {
98 if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) {
100 printf("background fsck lacks a snapshot\n");
103 if ((statb.st_flags & SF_SNAPSHOT) != 0 && cvtlevel == 0) {
104 cursnapshot = statb.st_ino;
107 (statb.st_flags & SF_SNAPSHOT) == 0) {
108 if (preen && bkgrdflag) {
112 pfatal("%s is not a disk device", dev);
113 if (reply("CONTINUE") == 0) {
125 pfatal("cannot convert a snapshot");
130 if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
135 printf("Can't open %s: %s\n", dev, strerror(errno));
141 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0||
142 sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0||
143 sysctlnametomib("vfs.ffs.setsize", setsize, &size) < 0 ||
144 sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0||
145 sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 ||
146 sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) {
147 pfatal("kernel lacks background fsck support\n");
151 * When kernel is lack of runtime bgfsck superblock summary
152 * adjustment functionality, it does not mean we can not
153 * continue, as old kernels will recompute the summary at
154 * mount time. However, it will be an unexpected softupdates
155 * inconsistency if it turns out that the summary is still
156 * incorrect. Set a flag so subsequent operation can know
160 if (sysctlnametomib("vfs.ffs.adjndir", adjndir, &size) < 0 ||
161 sysctlnametomib("vfs.ffs.adjnbfree", adjnbfree, &size) < 0 ||
162 sysctlnametomib("vfs.ffs.adjnifree", adjnifree, &size) < 0 ||
163 sysctlnametomib("vfs.ffs.adjnffree", adjnffree, &size) < 0 ||
164 sysctlnametomib("vfs.ffs.adjnumclusters", adjnumclusters, &size) < 0) {
166 pwarn("kernel lacks runtime superblock summary adjustment support");
168 cmd.version = FFS_CMD_VERSION;
169 cmd.handle = fsreadfd;
173 printf("** %s", dev);
174 if (bkgrdflag == 0 &&
175 (nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) {
178 pfatal("NO WRITE ACCESS");
179 printf(" (NO WRITE)");
184 * Read in the superblock, looking for alternates if necessary
186 if (readsb(1) == 0) {
188 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0)
190 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0)
192 for (cg = 0; cg < proto.fs_ncg; cg++) {
193 bflag = fsbtodb(&proto, cgsblock(&proto, cg));
197 if (cg >= proto.fs_ncg) {
198 printf("%s %s\n%s %s\n%s %s\n",
199 "SEARCH FOR ALTERNATE SUPER-BLOCK",
200 "FAILED. YOU MUST USE THE",
201 "-b OPTION TO FSCK TO SPECIFY THE",
202 "LOCATION OF AN ALTERNATE",
203 "SUPER-BLOCK TO SUPPLY NEEDED",
204 "INFORMATION; SEE fsck_ffs(8).");
208 pwarn("USING ALTERNATE SUPERBLOCK AT %jd\n", bflag);
211 if (skipclean && ckclean && sblock.fs_clean) {
212 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
215 maxfsblock = sblock.fs_size;
216 maxino = sblock.fs_ncg * sblock.fs_ipg;
218 * Check and potentially fix certain fields in the super block.
220 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) {
221 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK");
222 if (reply("SET TO DEFAULT") == 1) {
223 sblock.fs_optim = FS_OPTTIME;
227 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) {
228 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK",
230 if (reply("SET TO DEFAULT") == 1) {
231 sblock.fs_minfree = 10;
235 if (sblock.fs_magic == FS_UFS1_MAGIC &&
236 sblock.fs_old_inodefmt < FS_44INODEFMT) {
237 pwarn("Format of file system is too old.\n");
238 pwarn("Must update to modern format using a version of fsck\n");
239 pfatal("from before 2002 with the command ``fsck -c 2''\n");
242 if ((asblk.b_flags & B_DIRTY) != 0 && !bflag) {
243 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize);
244 flush(fswritefd, &asblk);
246 if (preen == 0 && yflag == 0 && sblock.fs_magic == FS_UFS2_MAGIC &&
247 fswritefd != -1 && chkrecovery(fsreadfd) == 0 &&
248 reply("SAVE DATA TO FIND ALTERNATE SUPERBLOCKS") != 0)
249 saverecovery(fsreadfd, fswritefd);
251 * read in the summary info.
254 sblock.fs_csp = Calloc(1, sblock.fs_cssize);
255 if (sblock.fs_csp == NULL) {
256 printf("cannot alloc %u bytes for cg summary info\n",
257 (unsigned)sblock.fs_cssize);
260 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
261 size = MIN(sblock.fs_cssize - i, sblock.fs_bsize);
262 readcnt[sblk.b_type]++;
263 if (blread(fsreadfd, (char *)sblock.fs_csp + i,
264 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
265 size) != 0 && !asked) {
266 pfatal("BAD SUMMARY INFORMATION");
267 if (reply("CONTINUE") == 0) {
275 * allocate and initialize the necessary maps
277 bmapsize = roundup(howmany(maxfsblock, CHAR_BIT), sizeof(short));
278 blockmap = Calloc((unsigned)bmapsize, sizeof (char));
279 if (blockmap == NULL) {
280 printf("cannot alloc %u bytes for blockmap\n",
284 inostathead = Calloc(sblock.fs_ncg, sizeof(struct inostatlist));
285 if (inostathead == NULL) {
286 printf("cannot alloc %u bytes for inostathead\n",
287 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg)));
290 numdirs = MAX(sblock.fs_cstotal.cs_ndir, 128);
293 listmax = numdirs + 10;
294 inpsort = (struct inoinfo **)Calloc(listmax, sizeof(struct inoinfo *));
295 inphead = (struct inoinfo **)Calloc(numdirs, sizeof(struct inoinfo *));
296 if (inpsort == NULL || inphead == NULL) {
297 printf("cannot alloc %ju bytes for inphead\n",
298 (uintmax_t)numdirs * sizeof(struct inoinfo *));
302 if (sblock.fs_flags & FS_DOSOFTDEP)
314 * Read in the super block and its summary info.
323 super = bflag ? bflag * dev_bsize : STDSB_NOHASHFAIL;
324 readcnt[sblk.b_type]++;
325 if ((ret = sbget(fsreadfd, &fs, super)) != 0) {
328 /* Superblock check-hash failed */
332 printf("%jd is not a file system "
333 "superblock\n", super / dev_bsize);
335 printf("Cannot find file system "
340 printf("I/O error reading %jd\n",
345 memcpy(&sblock, fs, fs->fs_sbsize);
348 * Compute block size that the file system is based on,
349 * according to fsbtodb, and adjust superblock block number
350 * so we can tell if this is an alternate later.
352 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
353 sblk.b_bno = sblock.fs_sblockactualloc / dev_bsize;
354 sblk.b_size = SBLOCKSIZE;
356 * Compare all fields that should not differ in alternate super block.
357 * When an alternate super-block is specified this check is skipped.
361 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize);
366 if (altsblock.x != sblock.x) { \
368 if (listerr && debug) \
369 printf("SUPER BLOCK VS ALTERNATE MISMATCH %s: " y " vs " y "\n", \
370 #x, (intmax_t)sblock.x, (intmax_t)altsblock.x); \
372 CHK(fs_sblkno, "%jd");
373 CHK(fs_cblkno, "%jd");
374 CHK(fs_iblkno, "%jd");
375 CHK(fs_dblkno, "%jd");
377 CHK(fs_bsize, "%jd");
378 CHK(fs_fsize, "%jd");
380 CHK(fs_bmask, "%#jx");
381 CHK(fs_fmask, "%#jx");
382 CHK(fs_bshift, "%jd");
383 CHK(fs_fshift, "%jd");
384 CHK(fs_fragshift, "%jd");
385 CHK(fs_fsbtodb, "%jd");
386 CHK(fs_sbsize, "%jd");
387 CHK(fs_nindir, "%jd");
388 CHK(fs_inopb, "%jd");
389 CHK(fs_cssize, "%jd");
392 CHK(fs_magic, "%#jx");
398 printf("%s: ", cdevname);
400 "VALUES IN SUPER BLOCK LSB=%jd DISAGREE WITH THOSE IN\n"
401 "LAST ALTERNATE LSB=%jd\n",
402 sblk.b_bno, asblk.b_bno);
403 if (reply("IGNORE ALTERNATE SUPER BLOCK") == 0)
408 * If not yet done, update UFS1 superblock with new wider fields.
410 if (sblock.fs_magic == FS_UFS1_MAGIC &&
411 sblock.fs_maxbsize != sblock.fs_bsize) {
412 sblock.fs_maxbsize = sblock.fs_bsize;
413 sblock.fs_time = sblock.fs_old_time;
414 sblock.fs_size = sblock.fs_old_size;
415 sblock.fs_dsize = sblock.fs_old_dsize;
416 sblock.fs_csaddr = sblock.fs_old_csaddr;
417 sblock.fs_cstotal.cs_ndir = sblock.fs_old_cstotal.cs_ndir;
418 sblock.fs_cstotal.cs_nbfree = sblock.fs_old_cstotal.cs_nbfree;
419 sblock.fs_cstotal.cs_nifree = sblock.fs_old_cstotal.cs_nifree;
420 sblock.fs_cstotal.cs_nffree = sblock.fs_old_cstotal.cs_nffree;
433 initbarea(&sblk, BT_SUPERBLK);
434 initbarea(&asblk, BT_SUPERBLK);
435 sblk.b_un.b_buf = Malloc(SBLOCKSIZE);
436 asblk.b_un.b_buf = Malloc(SBLOCKSIZE);
437 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
438 errx(EEXIT, "cannot allocate space for superblock");
439 dev_bsize = secsize = DEV_BSIZE;
443 * Calculate a prototype superblock based on information in the boot area.
444 * When done the cgsblock macro can be calculated and the fs_ncg field
445 * can be used. Do NOT attempt to use other macros without verifying that
446 * their needed information is available!
449 calcsb(char *dev, int devfd, struct fs *fs)
451 struct fsrecovery *fsr;
456 * We need fragments-per-group and the partition-size.
458 * Newfs stores these details at the end of the boot block area
459 * at the start of the filesystem partition. If they have been
460 * overwritten by a boot block, we fail. But usually they are
461 * there and we can use them.
463 if (ioctl(devfd, DIOCGSECTORSIZE, &secsize) == -1)
465 fsrbuf = Malloc(secsize);
467 errx(EEXIT, "calcsb: cannot allocate recovery buffer");
468 if (blread(devfd, fsrbuf,
469 (SBLOCK_UFS2 - secsize) / dev_bsize, secsize) != 0) {
473 fsr = (struct fsrecovery *)&fsrbuf[secsize - sizeof *fsr];
474 if (fsr->fsr_magic != FS_UFS2_MAGIC) {
478 memset(fs, 0, sizeof(struct fs));
479 fs->fs_fpg = fsr->fsr_fpg;
480 fs->fs_fsbtodb = fsr->fsr_fsbtodb;
481 fs->fs_sblkno = fsr->fsr_sblkno;
482 fs->fs_magic = fsr->fsr_magic;
483 fs->fs_ncg = fsr->fsr_ncg;
489 * Check to see if recovery information exists.
490 * Return 1 if it exists or cannot be created.
491 * Return 0 if it does not exist and can be created.
494 chkrecovery(int devfd)
496 struct fsrecovery *fsr;
501 * Could not determine if backup material exists, so do not
502 * offer to create it.
505 if (ioctl(devfd, DIOCGSECTORSIZE, &secsize) == -1 ||
506 (fsrbuf = Malloc(secsize)) == NULL ||
507 blread(devfd, fsrbuf, (SBLOCK_UFS2 - secsize) / dev_bsize,
513 * Recovery material has already been created, so do not
514 * need to create it again.
516 fsr = (struct fsrecovery *)&fsrbuf[secsize - sizeof *fsr];
517 if (fsr->fsr_magic == FS_UFS2_MAGIC) {
522 * Recovery material has not been created and can be if desired.
529 * Read the last sector of the boot block, replace the last
530 * 20 bytes with the recovery information, then write it back.
531 * The recovery information only works for UFS2 filesystems.
534 saverecovery(int readfd, int writefd)
536 struct fsrecovery *fsr;
541 if (sblock.fs_magic != FS_UFS2_MAGIC ||
542 ioctl(readfd, DIOCGSECTORSIZE, &secsize) == -1 ||
543 (fsrbuf = Malloc(secsize)) == NULL ||
544 blread(readfd, fsrbuf, (SBLOCK_UFS2 - secsize) / dev_bsize,
546 printf("RECOVERY DATA COULD NOT BE CREATED\n");
550 fsr = (struct fsrecovery *)&fsrbuf[secsize - sizeof *fsr];
551 fsr->fsr_magic = sblock.fs_magic;
552 fsr->fsr_fpg = sblock.fs_fpg;
553 fsr->fsr_fsbtodb = sblock.fs_fsbtodb;
554 fsr->fsr_sblkno = sblock.fs_sblkno;
555 fsr->fsr_ncg = sblock.fs_ncg;
556 blwrite(writefd, fsrbuf, (SBLOCK_UFS2 - secsize) / secsize, secsize);