f55ff3f3ef
in-core pointers to summary information. An array in this region (fs_csp) could overflow on filesystems with a very large number of cylinder groups (~16000 on i386 with 8k blocks). When this happens, other fields in the superblock get corrupted, and fsck refuses to check the filesystem. Solve this problem by replacing the fs_csp array in 'struct fs' with a single pointer, and add padding to keep the length of the 128-byte region fixed. Update the kernel and userland utilities to use just this single pointer. With this change, the kernel no longer makes use of the superblock fields 'fs_csshift' and 'fs_csmask'. Add a comment to newfs/mkfs.c to indicate that these fields must be calculated for compatibility with older kernels. Reviewed by: mckusick
343 lines
10 KiB
C
343 lines
10 KiB
C
/*
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* Copyright (c) 1983, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1983, 1992, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)dumpfs.c 8.5 (Berkeley) 4/29/95";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/time.h>
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#include <ufs/ffs/fs.h>
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#include <err.h>
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#include <fcntl.h>
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#include <fstab.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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union {
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struct fs fs;
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char pad[MAXBSIZE];
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} fsun;
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#define afs fsun.fs
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union {
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struct cg cg;
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char pad[MAXBSIZE];
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} cgun;
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#define acg cgun.cg
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long dev_bsize = 1;
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int dumpfs __P((char *));
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int dumpcg __P((char *, int, int));
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void pbits __P((void *, int));
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void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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register struct fstab *fs;
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int ch, eval;
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while ((ch = getopt(argc, argv, "")) != -1)
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switch(ch) {
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc < 1)
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usage();
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for (eval = 0; *argv; ++argv)
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if ((fs = getfsfile(*argv)) == NULL)
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eval |= dumpfs(*argv);
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else
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eval |= dumpfs(fs->fs_spec);
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exit(eval);
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}
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int
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dumpfs(name)
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char *name;
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{
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ssize_t n;
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int fd, c, i, j, k, size;
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if ((fd = open(name, O_RDONLY, 0)) < 0)
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goto err;
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if (lseek(fd, (off_t)SBOFF, SEEK_SET) == (off_t)-1)
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goto err;
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if ((n = read(fd, &afs, SBSIZE)) == -1)
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goto err;
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if (n != SBSIZE) {
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warnx("%s: non-existent or truncated superblock, skipped",
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name);
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(void)close(fd);
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return (1);
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}
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if (afs.fs_magic != FS_MAGIC) {
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warnx("%s: superblock has bad magic number, skipped", name);
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(void)close(fd);
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return (1);
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}
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if (afs.fs_postblformat == FS_42POSTBLFMT)
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afs.fs_nrpos = 8;
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dev_bsize = afs.fs_fsize / fsbtodb(&afs, 1);
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printf("magic\t%x\ttime\t%s", afs.fs_magic,
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ctime(&afs.fs_time));
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printf("id\t[ %x %x ]\n", afs.fs_id[0], afs.fs_id[1]);
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printf("cylgrp\t%s\tinodes\t%s\n",
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afs.fs_postblformat == FS_42POSTBLFMT ? "static" : "dynamic",
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afs.fs_inodefmt < FS_44INODEFMT ? "4.2/4.3BSD" : "4.4BSD");
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printf("nbfree\t%d\tndir\t%d\tnifree\t%d\tnffree\t%d\n",
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afs.fs_cstotal.cs_nbfree, afs.fs_cstotal.cs_ndir,
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afs.fs_cstotal.cs_nifree, afs.fs_cstotal.cs_nffree);
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printf("ncg\t%d\tncyl\t%d\tsize\t%d\tblocks\t%d\n",
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afs.fs_ncg, afs.fs_ncyl, afs.fs_size, afs.fs_dsize);
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printf("bsize\t%d\tshift\t%d\tmask\t0x%08x\n",
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afs.fs_bsize, afs.fs_bshift, afs.fs_bmask);
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printf("fsize\t%d\tshift\t%d\tmask\t0x%08x\n",
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afs.fs_fsize, afs.fs_fshift, afs.fs_fmask);
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printf("frag\t%d\tshift\t%d\tfsbtodb\t%d\n",
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afs.fs_frag, afs.fs_fragshift, afs.fs_fsbtodb);
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printf("cpg\t%d\tbpg\t%d\tfpg\t%d\tipg\t%d\n",
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afs.fs_cpg, afs.fs_fpg / afs.fs_frag, afs.fs_fpg, afs.fs_ipg);
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printf("minfree\t%d%%\toptim\t%s\tmaxcontig %d\tmaxbpg\t%d\n",
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afs.fs_minfree, afs.fs_optim == FS_OPTSPACE ? "space" : "time",
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afs.fs_maxcontig, afs.fs_maxbpg);
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printf("rotdelay %dms\trps\t%d\n",
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afs.fs_rotdelay, afs.fs_rps);
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printf("ntrak\t%d\tnsect\t%d\tnpsect\t%d\tspc\t%d\n",
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afs.fs_ntrak, afs.fs_nsect, afs.fs_npsect, afs.fs_spc);
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printf("symlinklen %d\ttrackskew %d\tinterleave %d\tcontigsumsize %d\n",
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afs.fs_maxsymlinklen, afs.fs_trackskew, afs.fs_interleave,
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afs.fs_contigsumsize);
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printf("nindir\t%d\tinopb\t%d\tnspf\t%d\tmaxfilesize\t%qu\n",
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afs.fs_nindir, afs.fs_inopb, afs.fs_nspf, afs.fs_maxfilesize);
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printf("sblkno\t%d\tcblkno\t%d\tiblkno\t%d\tdblkno\t%d\n",
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afs.fs_sblkno, afs.fs_cblkno, afs.fs_iblkno, afs.fs_dblkno);
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printf("sbsize\t%d\tcgsize\t%d\tcgoffset %d\tcgmask\t0x%08x\n",
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afs.fs_sbsize, afs.fs_cgsize, afs.fs_cgoffset, afs.fs_cgmask);
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printf("csaddr\t%d\tcssize\t%d\tshift\t%d\tmask\t0x%08x\n",
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afs.fs_csaddr, afs.fs_cssize, afs.fs_csshift, afs.fs_csmask);
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printf("cgrotor\t%d\tfmod\t%d\tronly\t%d\tclean\t%d\n",
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afs.fs_cgrotor, afs.fs_fmod, afs.fs_ronly, afs.fs_clean);
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printf("flags\t");
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if (afs.fs_flags == 0)
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printf("none");
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if (afs.fs_flags & FS_UNCLEAN)
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printf("unclean ");
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if (afs.fs_flags & FS_DOSOFTDEP)
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printf("soft-updates ");
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if ((afs.fs_flags & ~(FS_UNCLEAN | FS_DOSOFTDEP)) != 0)
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printf("unknown flags (%#x)",
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afs.fs_flags & ~(FS_UNCLEAN | FS_DOSOFTDEP));
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putchar('\n');
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if (afs.fs_cpc != 0)
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printf("blocks available in each of %d rotational positions",
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afs.fs_nrpos);
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else
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printf("(no rotational position table)\n");
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for (c = 0; c < afs.fs_cpc; c++) {
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printf("\ncylinder number %d:", c);
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for (i = 0; i < afs.fs_nrpos; i++) {
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if (fs_postbl(&afs, c)[i] == -1)
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continue;
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printf("\n position %d:\t", i);
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for (j = fs_postbl(&afs, c)[i], k = 1; ;
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j += fs_rotbl(&afs)[j], k++) {
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printf("%5d", j);
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if (k % 12 == 0)
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printf("\n\t\t");
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if (fs_rotbl(&afs)[j] == 0)
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break;
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}
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}
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}
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printf("\ncs[].cs_(nbfree,ndir,nifree,nffree):\n\t");
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afs.fs_csp = calloc(1, afs.fs_cssize);
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for (i = 0, j = 0; i < afs.fs_cssize; i += afs.fs_bsize, j++) {
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size = afs.fs_cssize - i < afs.fs_bsize ?
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afs.fs_cssize - i : afs.fs_bsize;
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if (lseek(fd,
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(off_t)(fsbtodb(&afs, (afs.fs_csaddr + j * afs.fs_frag))) *
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(off_t)dev_bsize, SEEK_SET) == (off_t)-1)
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goto err;
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if (read(fd, (char *)afs.fs_csp + i, size) != size)
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goto err;
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}
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for (i = 0; i < afs.fs_ncg; i++) {
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struct csum *cs = &afs.fs_cs(&afs, i);
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if (i && i % 4 == 0)
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printf("\n\t");
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printf("(%d,%d,%d,%d) ",
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cs->cs_nbfree, cs->cs_ndir, cs->cs_nifree, cs->cs_nffree);
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}
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printf("\n");
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if (afs.fs_ncyl % afs.fs_cpg) {
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printf("cylinders in last group %d\n",
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i = afs.fs_ncyl % afs.fs_cpg);
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printf("blocks in last group %d\n",
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i * afs.fs_spc / NSPB(&afs));
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}
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printf("\n");
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for (i = 0; i < afs.fs_ncg; i++)
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if (dumpcg(name, fd, i))
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goto err;
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(void)close(fd);
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return (0);
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err: if (fd != -1)
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(void)close(fd);
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warn("%s", name);
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return (1);
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};
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int
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dumpcg(name, fd, c)
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char *name;
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int fd, c;
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{
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off_t cur;
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int i, j;
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printf("\ncg %d:\n", c);
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if ((cur = lseek(fd, (off_t)(fsbtodb(&afs, cgtod(&afs, c))) *
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(off_t)dev_bsize, SEEK_SET)) == (off_t)-1)
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return (1);
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if (read(fd, &acg, afs.fs_bsize) != afs.fs_bsize) {
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warnx("%s: error reading cg", name);
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return (1);
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}
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printf("magic\t%x\ttell\t%qx\ttime\t%s",
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afs.fs_postblformat == FS_42POSTBLFMT ?
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((struct ocg *)&acg)->cg_magic : acg.cg_magic,
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cur, ctime(&acg.cg_time));
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printf("cgx\t%d\tncyl\t%d\tniblk\t%d\tndblk\t%d\n",
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acg.cg_cgx, acg.cg_ncyl, acg.cg_niblk, acg.cg_ndblk);
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printf("nbfree\t%d\tndir\t%d\tnifree\t%d\tnffree\t%d\n",
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acg.cg_cs.cs_nbfree, acg.cg_cs.cs_ndir,
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acg.cg_cs.cs_nifree, acg.cg_cs.cs_nffree);
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printf("rotor\t%d\tirotor\t%d\tfrotor\t%d\nfrsum",
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acg.cg_rotor, acg.cg_irotor, acg.cg_frotor);
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for (i = 1, j = 0; i < afs.fs_frag; i++) {
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printf("\t%d", acg.cg_frsum[i]);
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j += i * acg.cg_frsum[i];
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}
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printf("\nsum of frsum: %d", j);
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if (afs.fs_contigsumsize > 0) {
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for (i = 1; i < afs.fs_contigsumsize; i++) {
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if ((i - 1) % 8 == 0)
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printf("\nclusters %d-%d:", i,
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afs.fs_contigsumsize - 1 < i + 7 ?
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afs.fs_contigsumsize - 1 : i + 7);
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printf("\t%d", cg_clustersum(&acg)[i]);
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}
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printf("\nclusters size %d and over: %d\n",
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afs.fs_contigsumsize,
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cg_clustersum(&acg)[afs.fs_contigsumsize]);
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printf("clusters free:\t");
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pbits(cg_clustersfree(&acg), acg.cg_nclusterblks);
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} else
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printf("\n");
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printf("iused:\t");
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pbits(cg_inosused(&acg), afs.fs_ipg);
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printf("free:\t");
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pbits(cg_blksfree(&acg), afs.fs_fpg);
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printf("b:\n");
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for (i = 0; i < afs.fs_cpg; i++) {
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if (cg_blktot(&acg)[i] == 0)
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continue;
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printf(" c%d:\t(%d)\t", i, cg_blktot(&acg)[i]);
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for (j = 0; j < afs.fs_nrpos; j++) {
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if (afs.fs_cpc > 0 &&
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fs_postbl(&afs, i % afs.fs_cpc)[j] == -1)
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continue;
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printf(" %d", cg_blks(&afs, &acg, i)[j]);
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}
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printf("\n");
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}
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return (0);
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};
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void
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pbits(vp, max)
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register void *vp;
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int max;
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{
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register int i;
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register char *p;
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int count, j;
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for (count = i = 0, p = vp; i < max; i++)
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if (isset(p, i)) {
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if (count)
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printf(",%s", count % 6 ? " " : "\n\t");
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count++;
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printf("%d", i);
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j = i;
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while ((i+1)<max && isset(p, i+1))
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i++;
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if (i != j)
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printf("-%d", i);
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}
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printf("\n");
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}
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void
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usage()
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{
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(void)fprintf(stderr, "usage: dumpfs filesys | device\n");
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exit(1);
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}
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