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>
41 #include <sys/disklabel.h>
43 #include <sys/sysctl.h>
45 #include <ufs/ufs/dinode.h>
46 #include <ufs/ffs/fs.h>
58 #define altsblock (*asblk.b_un.b_fs)
59 #define POWEROF2(num) (((num) & ((num) - 1)) == 0)
61 static int calcsb(char *dev, int devfd, struct fs *fs);
62 static void saverecovery(int readfd, int writefd);
63 static int chkrecovery(int devfd);
66 * Read in a superblock finding an alternate if necessary.
67 * Return 1 if successful, 0 if unsuccessful, -1 if file system
68 * is already clean (ckclean and preen mode only).
82 if (stat(dev, &statb) < 0) {
83 printf("Can't stat %s: %s\n", dev, strerror(errno));
90 if ((statb.st_mode & S_IFMT) != S_IFCHR &&
91 (statb.st_mode & S_IFMT) != S_IFBLK) {
92 if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) {
94 printf("background fsck lacks a snapshot\n");
97 if ((statb.st_flags & SF_SNAPSHOT) != 0 && cvtlevel == 0) {
98 cursnapshot = statb.st_ino;
101 (statb.st_flags & SF_SNAPSHOT) == 0) {
102 if (preen && bkgrdflag) {
106 pfatal("%s is not a disk device", dev);
107 if (reply("CONTINUE") == 0) {
119 pfatal("cannot convert a snapshot");
124 if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
129 printf("Can't open %s: %s\n", dev, strerror(errno));
135 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0||
136 sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0||
137 sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0||
138 sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 ||
139 sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) {
140 pfatal("kernel lacks background fsck support\n");
144 * When kernel is lack of runtime bgfsck superblock summary
145 * adjustment functionality, it does not mean we can not
146 * continue, as old kernels will recompute the summary at
147 * mount time. However, it will be an unexpected softupdates
148 * inconsistency if it turns out that the summary is still
149 * incorrect. Set a flag so subsequent operation can know
153 if (sysctlnametomib("vfs.ffs.adjndir", adjndir, &size) < 0 ||
154 sysctlnametomib("vfs.ffs.adjnbfree", adjnbfree, &size) < 0 ||
155 sysctlnametomib("vfs.ffs.adjnifree", adjnifree, &size) < 0 ||
156 sysctlnametomib("vfs.ffs.adjnffree", adjnffree, &size) < 0 ||
157 sysctlnametomib("vfs.ffs.adjnumclusters", adjnumclusters, &size) < 0) {
159 pwarn("kernel lacks runtime superblock summary adjustment support");
161 cmd.version = FFS_CMD_VERSION;
162 cmd.handle = fsreadfd;
166 printf("** %s", dev);
167 if (bkgrdflag == 0 &&
168 (nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) {
171 pfatal("NO WRITE ACCESS");
172 printf(" (NO WRITE)");
177 * Read in the superblock, looking for alternates if necessary
179 if (readsb(1) == 0) {
181 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0)
183 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0)
185 for (cg = 0; cg < proto.fs_ncg; cg++) {
186 bflag = fsbtodb(&proto, cgsblock(&proto, cg));
190 if (cg >= proto.fs_ncg) {
191 printf("%s %s\n%s %s\n%s %s\n",
192 "SEARCH FOR ALTERNATE SUPER-BLOCK",
193 "FAILED. YOU MUST USE THE",
194 "-b OPTION TO FSCK TO SPECIFY THE",
195 "LOCATION OF AN ALTERNATE",
196 "SUPER-BLOCK TO SUPPLY NEEDED",
197 "INFORMATION; SEE fsck_ffs(8).");
201 pwarn("USING ALTERNATE SUPERBLOCK AT %jd\n", bflag);
204 if (skipclean && ckclean && sblock.fs_clean) {
205 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
208 maxfsblock = sblock.fs_size;
209 maxino = sblock.fs_ncg * sblock.fs_ipg;
211 * Check and potentially fix certain fields in the super block.
213 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) {
214 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK");
215 if (reply("SET TO DEFAULT") == 1) {
216 sblock.fs_optim = FS_OPTTIME;
220 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) {
221 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK",
223 if (reply("SET TO DEFAULT") == 1) {
224 sblock.fs_minfree = 10;
228 if (sblock.fs_magic == FS_UFS1_MAGIC &&
229 sblock.fs_old_inodefmt < FS_44INODEFMT) {
230 pwarn("Format of file system is too old.\n");
231 pwarn("Must update to modern format using a version of fsck\n");
232 pfatal("from before 2002 with the command ``fsck -c 2''\n");
235 if (asblk.b_dirty && !bflag) {
236 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize);
237 flush(fswritefd, &asblk);
239 if (preen == 0 && yflag == 0 && sblock.fs_magic == FS_UFS2_MAGIC &&
240 fswritefd != -1 && chkrecovery(fsreadfd) == 0 &&
241 reply("SAVE DATA TO FIND ALTERNATE SUPERBLOCKS") != 0)
242 saverecovery(fsreadfd, fswritefd);
244 * read in the summary info.
247 sblock.fs_csp = Calloc(1, sblock.fs_cssize);
248 if (sblock.fs_csp == NULL) {
249 printf("cannot alloc %u bytes for cg summary info\n",
250 (unsigned)sblock.fs_cssize);
253 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
254 size = MIN(sblock.fs_cssize - i, sblock.fs_bsize);
255 readcnt[sblk.b_type]++;
256 if (blread(fsreadfd, (char *)sblock.fs_csp + i,
257 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
258 size) != 0 && !asked) {
259 pfatal("BAD SUMMARY INFORMATION");
260 if (reply("CONTINUE") == 0) {
268 * allocate and initialize the necessary maps
270 bmapsize = roundup(howmany(maxfsblock, CHAR_BIT), sizeof(short));
271 blockmap = Calloc((unsigned)bmapsize, sizeof (char));
272 if (blockmap == NULL) {
273 printf("cannot alloc %u bytes for blockmap\n",
277 inostathead = Calloc(sblock.fs_ncg, sizeof(struct inostatlist));
278 if (inostathead == NULL) {
279 printf("cannot alloc %u bytes for inostathead\n",
280 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg)));
283 numdirs = MAX(sblock.fs_cstotal.cs_ndir, 128);
286 listmax = numdirs + 10;
287 inpsort = (struct inoinfo **)Calloc(listmax, sizeof(struct inoinfo *));
288 inphead = (struct inoinfo **)Calloc(numdirs, sizeof(struct inoinfo *));
289 if (inpsort == NULL || inphead == NULL) {
290 printf("cannot alloc %ju bytes for inphead\n",
291 (uintmax_t)numdirs * sizeof(struct inoinfo *));
295 if (sblock.fs_flags & FS_DOSOFTDEP)
307 * Possible superblock locations ordered from most to least likely.
309 static int sblock_try[] = SBLOCKSEARCH;
311 #define BAD_MAGIC_MSG \
312 "The previous newfs operation on this volume did not complete.\n" \
313 "You must complete newfs before mounting this volume.\n"
316 * Read in the super block and its summary info.
326 readcnt[sblk.b_type]++;
327 if ((blread(fsreadfd, (char *)&sblock, super, (long)SBLOCKSIZE)))
329 if (sblock.fs_magic == FS_BAD_MAGIC) {
330 fprintf(stderr, BAD_MAGIC_MSG);
333 if (sblock.fs_magic != FS_UFS1_MAGIC &&
334 sblock.fs_magic != FS_UFS2_MAGIC) {
335 fprintf(stderr, "%jd is not a file system superblock\n",
340 for (i = 0; sblock_try[i] != -1; i++) {
341 super = sblock_try[i] / dev_bsize;
342 readcnt[sblk.b_type]++;
343 if ((blread(fsreadfd, (char *)&sblock, super,
346 if (sblock.fs_magic == FS_BAD_MAGIC) {
347 fprintf(stderr, BAD_MAGIC_MSG);
350 if ((sblock.fs_magic == FS_UFS1_MAGIC ||
351 (sblock.fs_magic == FS_UFS2_MAGIC &&
352 sblock.fs_sblockloc == sblock_try[i])) &&
353 sblock.fs_ncg >= 1 &&
354 sblock.fs_bsize >= MINBSIZE &&
355 sblock.fs_sbsize >= roundup(sizeof(struct fs), dev_bsize))
358 if (sblock_try[i] == -1) {
359 fprintf(stderr, "Cannot find file system superblock\n");
364 * Compute block size that the file system is based on,
365 * according to fsbtodb, and adjust superblock block number
366 * so we can tell if this is an alternate later.
369 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
370 sblk.b_bno = super / dev_bsize;
371 sblk.b_size = SBLOCKSIZE;
373 * Compare all fields that should not differ in alternate super block.
374 * When an alternate super-block is specified this check is skipped.
378 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize);
383 if (altsblock.x != sblock.x) { \
385 if (listerr && debug) \
386 printf("SUPER BLOCK VS ALTERNATE MISMATCH %s: " y " vs " y "\n", \
387 #x, (intmax_t)sblock.x, (intmax_t)altsblock.x); \
389 CHK(fs_sblkno, "%jd");
390 CHK(fs_cblkno, "%jd");
391 CHK(fs_iblkno, "%jd");
392 CHK(fs_dblkno, "%jd");
394 CHK(fs_bsize, "%jd");
395 CHK(fs_fsize, "%jd");
397 CHK(fs_bmask, "%#jx");
398 CHK(fs_fmask, "%#jx");
399 CHK(fs_bshift, "%jd");
400 CHK(fs_fshift, "%jd");
401 CHK(fs_fragshift, "%jd");
402 CHK(fs_fsbtodb, "%jd");
403 CHK(fs_sbsize, "%jd");
404 CHK(fs_nindir, "%jd");
405 CHK(fs_inopb, "%jd");
406 CHK(fs_cssize, "%jd");
409 CHK(fs_magic, "%#jx");
415 printf("%s: ", cdevname);
417 "VALUES IN SUPER BLOCK LSB=%jd DISAGREE WITH THOSE IN\n"
418 "LAST ALTERNATE LSB=%jd\n",
419 sblk.b_bno, asblk.b_bno);
420 if (reply("IGNORE ALTERNATE SUPER BLOCK") == 0)
425 * If not yet done, update UFS1 superblock with new wider fields.
427 if (sblock.fs_magic == FS_UFS1_MAGIC &&
428 sblock.fs_maxbsize != sblock.fs_bsize) {
429 sblock.fs_maxbsize = sblock.fs_bsize;
430 sblock.fs_time = sblock.fs_old_time;
431 sblock.fs_size = sblock.fs_old_size;
432 sblock.fs_dsize = sblock.fs_old_dsize;
433 sblock.fs_csaddr = sblock.fs_old_csaddr;
434 sblock.fs_cstotal.cs_ndir = sblock.fs_old_cstotal.cs_ndir;
435 sblock.fs_cstotal.cs_nbfree = sblock.fs_old_cstotal.cs_nbfree;
436 sblock.fs_cstotal.cs_nifree = sblock.fs_old_cstotal.cs_nifree;
437 sblock.fs_cstotal.cs_nffree = sblock.fs_old_cstotal.cs_nffree;
450 initbarea(&sblk, BT_SUPERBLK);
451 initbarea(&asblk, BT_SUPERBLK);
452 sblk.b_un.b_buf = Malloc(SBLOCKSIZE);
453 asblk.b_un.b_buf = Malloc(SBLOCKSIZE);
454 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
455 errx(EEXIT, "cannot allocate space for superblock");
456 dev_bsize = secsize = DEV_BSIZE;
460 * Calculate a prototype superblock based on information in the boot area.
461 * When done the cgsblock macro can be calculated and the fs_ncg field
462 * can be used. Do NOT attempt to use other macros without verifying that
463 * their needed information is available!
466 calcsb(char *dev, int devfd, struct fs *fs)
468 struct fsrecovery fsr;
471 * We need fragments-per-group and the partition-size.
473 * Newfs stores these details at the end of the boot block area
474 * at the start of the filesystem partition. If they have been
475 * overwritten by a boot block, we fail. But usually they are
476 * there and we can use them.
478 if (blread(devfd, (char *)&fsr,
479 (SBLOCK_UFS2 - sizeof(fsr)) / dev_bsize, sizeof(fsr)) ||
480 fsr.fsr_magic != FS_UFS2_MAGIC)
482 memset(fs, 0, sizeof(struct fs));
483 fs->fs_fpg = fsr.fsr_fpg;
484 fs->fs_fsbtodb = fsr.fsr_fsbtodb;
485 fs->fs_sblkno = fsr.fsr_sblkno;
486 fs->fs_magic = fsr.fsr_magic;
487 fs->fs_ncg = fsr.fsr_ncg;
492 * Check to see if recovery information exists.
495 chkrecovery(int devfd)
497 struct fsrecovery fsr;
499 if (blread(devfd, (char *)&fsr,
500 (SBLOCK_UFS2 - sizeof(fsr)) / dev_bsize, sizeof(fsr)) ||
501 fsr.fsr_magic != FS_UFS2_MAGIC)
507 * Read the last sector of the boot block, replace the last
508 * 20 bytes with the recovery information, then write it back.
509 * The recovery information only works for UFS2 filesystems.
512 saverecovery(int readfd, int writefd)
514 struct fsrecovery fsr;
516 if (sblock.fs_magic != FS_UFS2_MAGIC ||
517 blread(readfd, (char *)&fsr,
518 (SBLOCK_UFS2 - sizeof(fsr)) / dev_bsize, sizeof(fsr)))
520 fsr.fsr_magic = sblock.fs_magic;
521 fsr.fsr_fpg = sblock.fs_fpg;
522 fsr.fsr_fsbtodb = sblock.fs_fsbtodb;
523 fsr.fsr_sblkno = sblock.fs_sblkno;
524 fsr.fsr_ncg = sblock.fs_ncg;
525 blwrite(writefd, (char *)&fsr, (SBLOCK_UFS2 - sizeof(fsr)) / dev_bsize,