2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
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32 static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95";
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <sys/param.h>
42 #include <sys/disklabel.h>
44 #include <sys/sysctl.h>
46 #include <ufs/ufs/dinode.h>
47 #include <ufs/ffs/fs.h>
59 #define altsblock (*asblk.b_un.b_fs)
60 #define POWEROF2(num) (((num) & ((num) - 1)) == 0)
62 static int calcsb(char *dev, int devfd, struct fs *fs);
63 static void saverecovery(int readfd, int writefd);
64 static int chkrecovery(int devfd);
67 * Read in a superblock finding an alternate if necessary.
68 * Return 1 if successful, 0 if unsuccessful, -1 if file system
69 * is already clean (ckclean and preen mode only).
83 if (stat(dev, &statb) < 0) {
84 printf("Can't stat %s: %s\n", dev, strerror(errno));
91 if ((statb.st_mode & S_IFMT) != S_IFCHR &&
92 (statb.st_mode & S_IFMT) != S_IFBLK) {
93 if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) {
95 printf("background fsck lacks a snapshot\n");
98 if ((statb.st_flags & SF_SNAPSHOT) != 0 && cvtlevel == 0) {
99 cursnapshot = statb.st_ino;
102 (statb.st_flags & SF_SNAPSHOT) == 0) {
103 if (preen && bkgrdflag) {
107 pfatal("%s is not a disk device", dev);
108 if (reply("CONTINUE") == 0) {
120 pfatal("cannot convert a snapshot");
125 if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
130 printf("Can't open %s: %s\n", dev, strerror(errno));
136 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0||
137 sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0||
138 sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0||
139 sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 ||
140 sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) {
141 pfatal("kernel lacks background fsck support\n");
145 * When kernel is lack of runtime bgfsck superblock summary
146 * adjustment functionality, it does not mean we can not
147 * continue, as old kernels will recompute the summary at
148 * mount time. However, it will be an unexpected softupdates
149 * inconsistency if it turns out that the summary is still
150 * incorrect. Set a flag so subsequent operation can know
154 if (sysctlnametomib("vfs.ffs.adjndir", adjndir, &size) < 0 ||
155 sysctlnametomib("vfs.ffs.adjnbfree", adjnbfree, &size) < 0 ||
156 sysctlnametomib("vfs.ffs.adjnifree", adjnifree, &size) < 0 ||
157 sysctlnametomib("vfs.ffs.adjnffree", adjnffree, &size) < 0 ||
158 sysctlnametomib("vfs.ffs.adjnumclusters", adjnumclusters, &size) < 0) {
160 pwarn("kernel lacks runtime superblock summary adjustment support");
162 cmd.version = FFS_CMD_VERSION;
163 cmd.handle = fsreadfd;
167 printf("** %s", dev);
168 if (bkgrdflag == 0 &&
169 (nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) {
172 pfatal("NO WRITE ACCESS");
173 printf(" (NO WRITE)");
178 * Read in the superblock, looking for alternates if necessary
180 if (readsb(1) == 0) {
182 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0)
184 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0)
186 for (cg = 0; cg < proto.fs_ncg; cg++) {
187 bflag = fsbtodb(&proto, cgsblock(&proto, cg));
191 if (cg >= proto.fs_ncg) {
192 printf("%s %s\n%s %s\n%s %s\n",
193 "SEARCH FOR ALTERNATE SUPER-BLOCK",
194 "FAILED. YOU MUST USE THE",
195 "-b OPTION TO FSCK TO SPECIFY THE",
196 "LOCATION OF AN ALTERNATE",
197 "SUPER-BLOCK TO SUPPLY NEEDED",
198 "INFORMATION; SEE fsck_ffs(8).");
202 pwarn("USING ALTERNATE SUPERBLOCK AT %jd\n", bflag);
205 if (skipclean && ckclean && sblock.fs_clean) {
206 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
209 maxfsblock = sblock.fs_size;
210 maxino = sblock.fs_ncg * sblock.fs_ipg;
212 * Check and potentially fix certain fields in the super block.
214 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) {
215 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK");
216 if (reply("SET TO DEFAULT") == 1) {
217 sblock.fs_optim = FS_OPTTIME;
221 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) {
222 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK",
224 if (reply("SET TO DEFAULT") == 1) {
225 sblock.fs_minfree = 10;
229 if (sblock.fs_magic == FS_UFS1_MAGIC &&
230 sblock.fs_old_inodefmt < FS_44INODEFMT) {
231 pwarn("Format of file system is too old.\n");
232 pwarn("Must update to modern format using a version of fsck\n");
233 pfatal("from before 2002 with the command ``fsck -c 2''\n");
236 if (asblk.b_dirty && !bflag) {
237 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize);
238 flush(fswritefd, &asblk);
240 if (preen == 0 && yflag == 0 && sblock.fs_magic == FS_UFS2_MAGIC &&
241 fswritefd != -1 && chkrecovery(fsreadfd) == 0 &&
242 reply("SAVE DATA TO FIND ALTERNATE SUPERBLOCKS") != 0)
243 saverecovery(fsreadfd, fswritefd);
245 * read in the summary info.
248 sblock.fs_csp = Calloc(1, sblock.fs_cssize);
249 if (sblock.fs_csp == NULL) {
250 printf("cannot alloc %u bytes for cg summary info\n",
251 (unsigned)sblock.fs_cssize);
254 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
255 size = MIN(sblock.fs_cssize - i, sblock.fs_bsize);
256 readcnt[sblk.b_type]++;
257 if (blread(fsreadfd, (char *)sblock.fs_csp + i,
258 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
259 size) != 0 && !asked) {
260 pfatal("BAD SUMMARY INFORMATION");
261 if (reply("CONTINUE") == 0) {
269 * allocate and initialize the necessary maps
271 bmapsize = roundup(howmany(maxfsblock, CHAR_BIT), sizeof(short));
272 blockmap = Calloc((unsigned)bmapsize, sizeof (char));
273 if (blockmap == NULL) {
274 printf("cannot alloc %u bytes for blockmap\n",
278 inostathead = Calloc(sblock.fs_ncg, sizeof(struct inostatlist));
279 if (inostathead == NULL) {
280 printf("cannot alloc %u bytes for inostathead\n",
281 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg)));
284 numdirs = MAX(sblock.fs_cstotal.cs_ndir, 128);
287 listmax = numdirs + 10;
288 inpsort = (struct inoinfo **)Calloc(listmax, sizeof(struct inoinfo *));
289 inphead = (struct inoinfo **)Calloc(numdirs, sizeof(struct inoinfo *));
290 if (inpsort == NULL || inphead == NULL) {
291 printf("cannot alloc %ju bytes for inphead\n",
292 (uintmax_t)numdirs * sizeof(struct inoinfo *));
296 if (sblock.fs_flags & FS_DOSOFTDEP)
308 * Possible superblock locations ordered from most to least likely.
310 static int sblock_try[] = SBLOCKSEARCH;
312 #define BAD_MAGIC_MSG \
313 "The previous newfs operation on this volume did not complete.\n" \
314 "You must complete newfs before mounting this volume.\n"
317 * Read in the super block and its summary info.
327 readcnt[sblk.b_type]++;
328 if ((blread(fsreadfd, (char *)&sblock, super, (long)SBLOCKSIZE)))
330 if (sblock.fs_magic == FS_BAD_MAGIC) {
331 fprintf(stderr, BAD_MAGIC_MSG);
334 if (sblock.fs_magic != FS_UFS1_MAGIC &&
335 sblock.fs_magic != FS_UFS2_MAGIC) {
336 fprintf(stderr, "%jd is not a file system superblock\n",
341 for (i = 0; sblock_try[i] != -1; i++) {
342 super = sblock_try[i] / dev_bsize;
343 readcnt[sblk.b_type]++;
344 if ((blread(fsreadfd, (char *)&sblock, super,
347 if (sblock.fs_magic == FS_BAD_MAGIC) {
348 fprintf(stderr, BAD_MAGIC_MSG);
351 if ((sblock.fs_magic == FS_UFS1_MAGIC ||
352 (sblock.fs_magic == FS_UFS2_MAGIC &&
353 sblock.fs_sblockloc == sblock_try[i])) &&
354 sblock.fs_ncg >= 1 &&
355 sblock.fs_bsize >= MINBSIZE &&
356 sblock.fs_sbsize >= roundup(sizeof(struct fs), dev_bsize))
359 if (sblock_try[i] == -1) {
360 fprintf(stderr, "Cannot find file system superblock\n");
365 * Compute block size that the file system is based on,
366 * according to fsbtodb, and adjust superblock block number
367 * so we can tell if this is an alternate later.
370 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
371 sblk.b_bno = super / dev_bsize;
372 sblk.b_size = SBLOCKSIZE;
374 * Compare all fields that should not differ in alternate super block.
375 * When an alternate super-block is specified this check is skipped.
379 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize);
384 if (altsblock.x != sblock.x) { \
386 if (listerr && debug) \
387 printf("SUPER BLOCK VS ALTERNATE MISMATCH %s: " y " vs " y "\n", \
388 #x, (intmax_t)sblock.x, (intmax_t)altsblock.x); \
390 CHK(fs_sblkno, "%jd");
391 CHK(fs_cblkno, "%jd");
392 CHK(fs_iblkno, "%jd");
393 CHK(fs_dblkno, "%jd");
395 CHK(fs_bsize, "%jd");
396 CHK(fs_fsize, "%jd");
398 CHK(fs_bmask, "%#jx");
399 CHK(fs_fmask, "%#jx");
400 CHK(fs_bshift, "%jd");
401 CHK(fs_fshift, "%jd");
402 CHK(fs_fragshift, "%jd");
403 CHK(fs_fsbtodb, "%jd");
404 CHK(fs_sbsize, "%jd");
405 CHK(fs_nindir, "%jd");
406 CHK(fs_inopb, "%jd");
407 CHK(fs_cssize, "%jd");
410 CHK(fs_magic, "%#jx");
416 printf("%s: ", cdevname);
418 "VALUES IN SUPER BLOCK LSB=%jd DISAGREE WITH THOSE IN\n"
419 "LAST ALTERNATE LSB=%jd\n",
420 sblk.b_bno, asblk.b_bno);
421 if (reply("IGNORE ALTERNATE SUPER BLOCK") == 0)
426 * If not yet done, update UFS1 superblock with new wider fields.
428 if (sblock.fs_magic == FS_UFS1_MAGIC &&
429 sblock.fs_maxbsize != sblock.fs_bsize) {
430 sblock.fs_maxbsize = sblock.fs_bsize;
431 sblock.fs_time = sblock.fs_old_time;
432 sblock.fs_size = sblock.fs_old_size;
433 sblock.fs_dsize = sblock.fs_old_dsize;
434 sblock.fs_csaddr = sblock.fs_old_csaddr;
435 sblock.fs_cstotal.cs_ndir = sblock.fs_old_cstotal.cs_ndir;
436 sblock.fs_cstotal.cs_nbfree = sblock.fs_old_cstotal.cs_nbfree;
437 sblock.fs_cstotal.cs_nifree = sblock.fs_old_cstotal.cs_nifree;
438 sblock.fs_cstotal.cs_nffree = sblock.fs_old_cstotal.cs_nffree;
451 initbarea(&sblk, BT_SUPERBLK);
452 initbarea(&asblk, BT_SUPERBLK);
453 sblk.b_un.b_buf = Malloc(SBLOCKSIZE);
454 asblk.b_un.b_buf = Malloc(SBLOCKSIZE);
455 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
456 errx(EEXIT, "cannot allocate space for superblock");
457 dev_bsize = secsize = DEV_BSIZE;
461 * Calculate a prototype superblock based on information in the boot area.
462 * When done the cgsblock macro can be calculated and the fs_ncg field
463 * can be used. Do NOT attempt to use other macros without verifying that
464 * their needed information is available!
467 calcsb(char *dev, int devfd, struct fs *fs)
469 struct fsrecovery *fsr;
474 * We need fragments-per-group and the partition-size.
476 * Newfs stores these details at the end of the boot block area
477 * at the start of the filesystem partition. If they have been
478 * overwritten by a boot block, we fail. But usually they are
479 * there and we can use them.
481 if (ioctl(devfd, DIOCGSECTORSIZE, &secsize) == -1)
483 fsrbuf = Malloc(secsize);
485 errx(EEXIT, "calcsb: cannot allocate recovery buffer");
486 if (blread(devfd, fsrbuf,
487 (SBLOCK_UFS2 - secsize) / dev_bsize, secsize) != 0)
489 fsr = (struct fsrecovery *)&fsrbuf[secsize - sizeof *fsr];
490 if (fsr->fsr_magic != FS_UFS2_MAGIC)
492 memset(fs, 0, sizeof(struct fs));
493 fs->fs_fpg = fsr->fsr_fpg;
494 fs->fs_fsbtodb = fsr->fsr_fsbtodb;
495 fs->fs_sblkno = fsr->fsr_sblkno;
496 fs->fs_magic = fsr->fsr_magic;
497 fs->fs_ncg = fsr->fsr_ncg;
503 * Check to see if recovery information exists.
504 * Return 1 if it exists or cannot be created.
505 * Return 0 if it does not exist and can be created.
508 chkrecovery(int devfd)
510 struct fsrecovery *fsr;
515 * Could not determine if backup material exists, so do not
516 * offer to create it.
518 if (ioctl(devfd, DIOCGSECTORSIZE, &secsize) == -1 ||
519 (fsrbuf = Malloc(secsize)) == NULL ||
520 blread(devfd, fsrbuf, (SBLOCK_UFS2 - secsize) / dev_bsize,
524 * Recovery material has already been created, so do not
525 * need to create it again.
527 fsr = (struct fsrecovery *)&fsrbuf[secsize - sizeof *fsr];
528 if (fsr->fsr_magic == FS_UFS2_MAGIC) {
533 * Recovery material has not been created and can be if desired.
540 * Read the last sector of the boot block, replace the last
541 * 20 bytes with the recovery information, then write it back.
542 * The recovery information only works for UFS2 filesystems.
545 saverecovery(int readfd, int writefd)
547 struct fsrecovery *fsr;
551 if (sblock.fs_magic != FS_UFS2_MAGIC ||
552 ioctl(readfd, DIOCGSECTORSIZE, &secsize) == -1 ||
553 (fsrbuf = Malloc(secsize)) == NULL ||
554 blread(readfd, fsrbuf, (SBLOCK_UFS2 - secsize) / dev_bsize,
556 printf("RECOVERY DATA COULD NOT BE CREATED\n");
559 fsr = (struct fsrecovery *)&fsrbuf[secsize - sizeof *fsr];
560 fsr->fsr_magic = sblock.fs_magic;
561 fsr->fsr_fpg = sblock.fs_fpg;
562 fsr->fsr_fsbtodb = sblock.fs_fsbtodb;
563 fsr->fsr_sblkno = sblock.fs_sblkno;
564 fsr->fsr_ncg = sblock.fs_ncg;
565 blwrite(writefd, fsrbuf, (SBLOCK_UFS2 - secsize) / secsize, secsize);