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33 * @(#)setup.c 8.10 (Berkeley) 5/9/95
34 * $FreeBSD: src/sbin/fsck/setup.c,v 1.17.2.4 2002/06/24 05:10:41 dillon Exp $
35 * $DragonFly: src/sbin/fsck/setup.c,v 1.5 2003/11/01 17:15:58 drhodus Exp $
39 #include <sys/param.h>
41 #include <sys/disklabel.h>
44 #include <vfs/ufs/dinode.h>
45 #include <vfs/ufs/fs.h>
55 #define altsblock (*asblk.b_un.b_fs)
56 #define POWEROF2(num) (((num) & ((num) - 1)) == 0)
58 static void badsb(int listerr, char *s);
59 static int calcsb(char *dev, int devfd, struct fs *fs);
60 static struct disklabel *getdisklabel(char *s, int fd);
61 static int readsb(int listerr);
64 * Read in a superblock finding an alternate if necessary.
65 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem
66 * is already clean (preen mode only).
71 long cg, size, asked, i, j;
72 long skipclean, bmapsize;
80 skipclean = fflag ? 0 : preen;
81 if (stat(dev, &statb) < 0) {
82 printf("Can't stat %s: %s\n", dev, strerror(errno));
85 if ((statb.st_mode & S_IFMT) != S_IFCHR &&
86 (statb.st_mode & S_IFMT) != S_IFBLK) {
87 pfatal("%s is not a disk device", dev);
88 if (reply("CONTINUE") == 0)
91 if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
92 printf("Can't open %s: %s\n", dev, strerror(errno));
97 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) {
100 pfatal("NO WRITE ACCESS");
101 printf(" (NO WRITE)");
109 sblk.b_un.b_buf = malloc(SBSIZE);
110 asblk.b_un.b_buf = malloc(SBSIZE);
111 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
112 errx(EEXIT, "cannot allocate space for superblock");
113 if ((lp = getdisklabel(NULL, fsreadfd)))
114 dev_bsize = secsize = lp->d_secsize;
116 dev_bsize = secsize = DEV_BSIZE;
118 * Read in the superblock, looking for alternates if necessary
120 if (readsb(1) == 0) {
122 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0)
124 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0)
126 for (cg = 0; cg < proto.fs_ncg; cg++) {
127 bflag = fsbtodb(&proto, cgsblock(&proto, cg));
131 if (cg >= proto.fs_ncg) {
132 printf("%s %s\n%s %s\n%s %s\n",
133 "SEARCH FOR ALTERNATE SUPER-BLOCK",
134 "FAILED. YOU MUST USE THE",
135 "-b OPTION TO FSCK TO SPECIFY THE",
136 "LOCATION OF AN ALTERNATE",
137 "SUPER-BLOCK TO SUPPLY NEEDED",
138 "INFORMATION; SEE fsck(8).");
142 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag);
145 if (skipclean && sblock.fs_clean) {
146 pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n");
149 maxfsblock = sblock.fs_size;
150 maxino = sblock.fs_ncg * sblock.fs_ipg;
152 * Check and potentially fix certain fields in the super block.
154 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) {
155 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK");
156 if (reply("SET TO DEFAULT") == 1) {
157 sblock.fs_optim = FS_OPTTIME;
161 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) {
162 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK",
164 if (reply("SET TO DEFAULT") == 1) {
165 sblock.fs_minfree = 10;
169 if (sblock.fs_interleave < 1 ||
170 sblock.fs_interleave > sblock.fs_nsect) {
171 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK",
172 sblock.fs_interleave);
173 sblock.fs_interleave = 1;
175 printf(" (FIXED)\n");
176 if (preen || reply("SET TO DEFAULT") == 1) {
181 if (sblock.fs_npsect < sblock.fs_nsect ||
182 sblock.fs_npsect > sblock.fs_nsect*2) {
183 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK",
185 sblock.fs_npsect = sblock.fs_nsect;
187 printf(" (FIXED)\n");
188 if (preen || reply("SET TO DEFAULT") == 1) {
193 if (sblock.fs_inodefmt >= FS_44INODEFMT) {
196 sblock.fs_qbmask = ~sblock.fs_bmask;
197 sblock.fs_qfmask = ~sblock.fs_fmask;
198 /* This should match the kernel limit in ffs_oldfscompat(). */
199 sblock.fs_maxfilesize = (u_int64_t)1 << 39;
203 * Convert to new inode format.
205 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) {
207 pwarn("CONVERTING TO NEW INODE FORMAT\n");
208 else if (!reply("CONVERT TO NEW INODE FORMAT"))
211 sblock.fs_inodefmt = FS_44INODEFMT;
212 sizepb = sblock.fs_bsize;
213 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1;
214 for (i = 0; i < NIADDR; i++) {
215 sizepb *= NINDIR(&sblock);
216 sblock.fs_maxfilesize += sizepb;
218 sblock.fs_maxsymlinklen = MAXSYMLINKLEN;
219 sblock.fs_qbmask = ~sblock.fs_bmask;
220 sblock.fs_qfmask = ~sblock.fs_fmask;
225 * Convert to new cylinder group format.
227 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) {
229 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n");
230 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT"))
233 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT;
235 sblock.fs_postbloff =
236 (char *)(&sblock.fs_opostbl[0][0]) -
237 (char *)(&sblock.fs_firstfield);
238 sblock.fs_rotbloff = &sblock.fs_space[0] -
239 (u_char *)(&sblock.fs_firstfield);
241 fragroundup(&sblock, CGSIZE(&sblock));
245 if (asblk.b_dirty && !bflag) {
246 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize);
247 flush(fswritefd, &asblk);
250 * read in the summary info.
253 sblock.fs_csp = calloc(1, sblock.fs_cssize);
254 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
255 size = sblock.fs_cssize - i < sblock.fs_bsize ?
256 sblock.fs_cssize - i : sblock.fs_bsize;
257 if (bread(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, NBBY), 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((unsigned)(sblock.fs_ncg),
279 sizeof(struct inostatlist));
280 if (inostathead == NULL) {
281 printf("cannot alloc %u bytes for inostathead\n",
282 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg)));
285 numdirs = sblock.fs_cstotal.cs_ndir;
288 printf("numdirs is zero, try using an alternate superblock\n");
292 listmax = numdirs + 10;
293 inpsort = (struct inoinfo **)calloc((unsigned)listmax,
294 sizeof(struct inoinfo *));
295 inphead = (struct inoinfo **)calloc((unsigned)numdirs,
296 sizeof(struct inoinfo *));
297 if (inpsort == NULL || inphead == NULL) {
298 printf("cannot alloc %u bytes for inphead\n",
299 (unsigned)numdirs * sizeof(struct inoinfo *));
303 if (sblock.fs_flags & FS_DOSOFTDEP)
315 * Read in the super block and its summary info.
320 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize;
322 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0)
325 sblk.b_size = SBSIZE;
327 * run a few consistency checks of the super block
329 if (sblock.fs_magic != FS_MAGIC)
330 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); }
331 if (sblock.fs_ncg < 1)
332 { badsb(listerr, "NCG OUT OF RANGE"); return (0); }
333 if (sblock.fs_cpg < 1)
334 { badsb(listerr, "CPG OUT OF RANGE"); return (0); }
335 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl ||
336 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl)
337 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); }
338 if (sblock.fs_sbsize > SBSIZE)
339 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); }
341 * Compute block size that the filesystem is based on,
342 * according to fsbtodb, and adjust superblock block number
343 * so we can tell if this is an alternate later.
346 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
347 sblk.b_bno = super / dev_bsize;
353 * Compare all fields that should not differ in alternate super block.
354 * When an alternate super-block is specified this check is skipped.
356 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize);
359 if (altsblock.fs_sblkno != sblock.fs_sblkno ||
360 altsblock.fs_cblkno != sblock.fs_cblkno ||
361 altsblock.fs_iblkno != sblock.fs_iblkno ||
362 altsblock.fs_dblkno != sblock.fs_dblkno ||
363 altsblock.fs_cgoffset != sblock.fs_cgoffset ||
364 altsblock.fs_cgmask != sblock.fs_cgmask ||
365 altsblock.fs_ncg != sblock.fs_ncg ||
366 altsblock.fs_bsize != sblock.fs_bsize ||
367 altsblock.fs_fsize != sblock.fs_fsize ||
368 altsblock.fs_frag != sblock.fs_frag ||
369 altsblock.fs_bmask != sblock.fs_bmask ||
370 altsblock.fs_fmask != sblock.fs_fmask ||
371 altsblock.fs_bshift != sblock.fs_bshift ||
372 altsblock.fs_fshift != sblock.fs_fshift ||
373 altsblock.fs_fragshift != sblock.fs_fragshift ||
374 altsblock.fs_fsbtodb != sblock.fs_fsbtodb ||
375 altsblock.fs_sbsize != sblock.fs_sbsize ||
376 altsblock.fs_nindir != sblock.fs_nindir ||
377 altsblock.fs_inopb != sblock.fs_inopb ||
378 altsblock.fs_cssize != sblock.fs_cssize ||
379 altsblock.fs_cpg != sblock.fs_cpg ||
380 altsblock.fs_ipg != sblock.fs_ipg ||
381 altsblock.fs_fpg != sblock.fs_fpg ||
382 altsblock.fs_magic != sblock.fs_magic) {
384 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE");
392 badsb(int listerr, char *s)
398 printf("%s: ", cdevname);
399 pfatal("BAD SUPER BLOCK: %s\n", s);
403 * Calculate a prototype superblock based on information in the disk label.
404 * When done the cgsblock macro can be calculated and the fs_ncg field
405 * can be used. Do NOT attempt to use other macros without verifying that
406 * their needed information is available!
409 calcsb(char *dev, int devfd, register struct fs *fs)
411 register struct disklabel *lp;
412 register struct partition *pp;
416 cp = strchr(dev, '\0') - 1;
417 if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) {
418 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev);
421 lp = getdisklabel(dev, devfd);
423 pp = &lp->d_partitions[0];
425 pp = &lp->d_partitions[*cp - 'a'];
426 if (pp->p_fstype != FS_BSDFFS) {
427 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n",
428 dev, pp->p_fstype < FSMAXTYPES ?
429 fstypenames[pp->p_fstype] : "unknown");
432 if (pp->p_fsize == 0 || pp->p_frag == 0 ||
433 pp->p_cpg == 0 || pp->p_size == 0) {
434 pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n",
435 dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype],
436 pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size);
439 memset(fs, 0, sizeof(struct fs));
440 fs->fs_fsize = pp->p_fsize;
441 fs->fs_frag = pp->p_frag;
442 fs->fs_cpg = pp->p_cpg;
443 fs->fs_size = pp->p_size;
444 fs->fs_ntrak = lp->d_ntracks;
445 fs->fs_nsect = lp->d_nsectors;
446 fs->fs_spc = lp->d_secpercyl;
447 fs->fs_nspf = fs->fs_fsize / lp->d_secsize;
448 fs->fs_sblkno = roundup(
449 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize),
451 fs->fs_cgmask = 0xffffffff;
452 for (i = fs->fs_ntrak; i > 1; i >>= 1)
454 if (!POWEROF2(fs->fs_ntrak))
456 fs->fs_cgoffset = roundup(
457 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag);
458 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs);
459 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg);
460 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1)
462 dev_bsize = lp->d_secsize;
466 static struct disklabel *
467 getdisklabel(char *s, int fd)
469 static struct disklabel lab;
471 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) {
473 return ((struct disklabel *)NULL);
474 pwarn("ioctl (GCINFO): %s\n", strerror(errno));
475 errx(EEXIT, "%s: can't read disk label", s);