baa12a84a7
running time for a full fsck. It also reduces the random access time for large files and speeds the traversal time for directory tree walks. The key idea is to reserve a small area in each cylinder group immediately following the inode blocks for the use of metadata, specifically indirect blocks and directory contents. The new policy is to preferentially place metadata in the metadata area and everything else in the blocks that follow the metadata area. The size of this area can be set when creating a filesystem using newfs(8) or changed in an existing filesystem using tunefs(8). Both utilities use the `-k held-for-metadata-blocks' option to specify the amount of space to be held for metadata blocks in each cylinder group. By default, newfs(8) sets this area to half of minfree (typically 4% of the data area). This work was inspired by a paper presented at Usenix's FAST '13: www.usenix.org/conference/fast13/ffsck-fast-file-system-checker Details of this implementation appears in the April 2013 of ;login: www.usenix.org/publications/login/april-2013-volume-38-number-2. A copy of the April 2013 ;login: paper can also be downloaded from: www.mckusick.com/publications/faster_fsck.pdf. Reviewed by: kib Tested by: Peter Holm MFC after: 4 weeks
508 lines
14 KiB
C
508 lines
14 KiB
C
/*
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* Copyright (c) 2009 Robert N. M. Watson
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* All rights reserved.
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*
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* This software was developed at the University of Cambridge Computer
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* Laboratory with support from a grant from Google, Inc.
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*
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* Copyright (c) 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by Marshall
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* Kirk McKusick and Network Associates Laboratories, the Security
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* Research Division of Network Associates, Inc. under DARPA/SPAWAR
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* contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
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* research program.
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*
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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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* 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 <sys/disklabel.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <fstab.h>
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#include <libufs.h>
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#include <paths.h>
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#include <stdint.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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#define afs disk.d_fs
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#define acg disk.d_cg
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static struct uufsd disk;
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static int dumpfs(const char *);
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static int dumpfsid(void);
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static int dumpcg(void);
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static int dumpfreespace(const char *, int);
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static void dumpfreespacecg(int);
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static int marshal(const char *);
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static void pbits(void *, int);
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static void pblklist(void *, int, off_t, int);
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static void ufserr(const char *);
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static void usage(void) __dead2;
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int
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main(int argc, char *argv[])
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{
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const char *name;
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int ch, dofreespace, domarshal, dolabel, eval;
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dofreespace = domarshal = dolabel = eval = 0;
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while ((ch = getopt(argc, argv, "lfm")) != -1) {
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switch (ch) {
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case 'f':
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dofreespace++;
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break;
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case 'm':
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domarshal = 1;
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break;
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case 'l':
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dolabel = 1;
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break;
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case '?':
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default:
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usage();
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}
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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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if (dofreespace && domarshal)
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usage();
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if (dofreespace > 2)
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usage();
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while ((name = *argv++) != NULL) {
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if (ufs_disk_fillout(&disk, name) == -1) {
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ufserr(name);
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eval |= 1;
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continue;
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}
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if (dofreespace)
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eval |= dumpfreespace(name, dofreespace);
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else if (domarshal)
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eval |= marshal(name);
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else if (dolabel)
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eval |= dumpfsid();
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else
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eval |= dumpfs(name);
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ufs_disk_close(&disk);
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}
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exit(eval);
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}
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static int
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dumpfsid(void)
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{
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printf("%sufsid/%08x%08x\n", _PATH_DEV, afs.fs_id[0], afs.fs_id[1]);
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return 0;
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}
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static int
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dumpfs(const char *name)
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{
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time_t fstime;
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int64_t fssize;
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int32_t fsflags;
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int i;
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switch (disk.d_ufs) {
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case 2:
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fssize = afs.fs_size;
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fstime = afs.fs_time;
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printf("magic\t%x (UFS2)\ttime\t%s",
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afs.fs_magic, ctime(&fstime));
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printf("superblock location\t%jd\tid\t[ %x %x ]\n",
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(intmax_t)afs.fs_sblockloc, afs.fs_id[0], afs.fs_id[1]);
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printf("ncg\t%d\tsize\t%jd\tblocks\t%jd\n",
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afs.fs_ncg, (intmax_t)fssize, (intmax_t)afs.fs_dsize);
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break;
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case 1:
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fssize = afs.fs_old_size;
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fstime = afs.fs_old_time;
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printf("magic\t%x (UFS1)\ttime\t%s",
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afs.fs_magic, ctime(&fstime));
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printf("id\t[ %08x %08x ]\n", afs.fs_id[0], afs.fs_id[1]);
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printf("ncg\t%d\tsize\t%jd\tblocks\t%jd\n",
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afs.fs_ncg, (intmax_t)fssize, (intmax_t)afs.fs_dsize);
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break;
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default:
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goto err;
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}
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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("minfree\t%d%%\toptim\t%s\tsymlinklen %d\n",
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afs.fs_minfree, afs.fs_optim == FS_OPTSPACE ? "space" : "time",
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afs.fs_maxsymlinklen);
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switch (disk.d_ufs) {
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case 2:
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printf("%s %d\tmaxbpg\t%d\tmaxcontig %d\tcontigsumsize %d\n",
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"maxbsize", afs.fs_maxbsize, afs.fs_maxbpg,
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afs.fs_maxcontig, afs.fs_contigsumsize);
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printf("nbfree\t%jd\tndir\t%jd\tnifree\t%jd\tnffree\t%jd\n",
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(intmax_t)afs.fs_cstotal.cs_nbfree,
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(intmax_t)afs.fs_cstotal.cs_ndir,
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(intmax_t)afs.fs_cstotal.cs_nifree,
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(intmax_t)afs.fs_cstotal.cs_nffree);
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printf("bpg\t%d\tfpg\t%d\tipg\t%d\tunrefs\t%jd\n",
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afs.fs_fpg / afs.fs_frag, afs.fs_fpg, afs.fs_ipg,
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(intmax_t)afs.fs_unrefs);
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printf("nindir\t%d\tinopb\t%d\tmaxfilesize\t%ju\n",
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afs.fs_nindir, afs.fs_inopb,
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(uintmax_t)afs.fs_maxfilesize);
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printf("sbsize\t%d\tcgsize\t%d\tcsaddr\t%jd\tcssize\t%d\n",
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afs.fs_sbsize, afs.fs_cgsize, (intmax_t)afs.fs_csaddr,
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afs.fs_cssize);
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break;
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case 1:
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printf("maxbpg\t%d\tmaxcontig %d\tcontigsumsize %d\n",
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afs.fs_maxbpg, afs.fs_maxcontig, afs.fs_contigsumsize);
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printf("nbfree\t%d\tndir\t%d\tnifree\t%d\tnffree\t%d\n",
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afs.fs_old_cstotal.cs_nbfree, afs.fs_old_cstotal.cs_ndir,
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afs.fs_old_cstotal.cs_nifree, afs.fs_old_cstotal.cs_nffree);
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printf("cpg\t%d\tbpg\t%d\tfpg\t%d\tipg\t%d\n",
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afs.fs_old_cpg, afs.fs_fpg / afs.fs_frag, afs.fs_fpg,
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afs.fs_ipg);
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printf("nindir\t%d\tinopb\t%d\tnspf\t%d\tmaxfilesize\t%ju\n",
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afs.fs_nindir, afs.fs_inopb, afs.fs_old_nspf,
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(uintmax_t)afs.fs_maxfilesize);
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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_old_cgoffset,
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afs.fs_old_cgmask);
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printf("csaddr\t%d\tcssize\t%d\n",
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afs.fs_old_csaddr, afs.fs_cssize);
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printf("rotdelay %dms\trps\t%d\ttrackskew %d\tinterleave %d\n",
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afs.fs_old_rotdelay, afs.fs_old_rps, afs.fs_old_trackskew,
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afs.fs_old_interleave);
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printf("nsect\t%d\tnpsect\t%d\tspc\t%d\n",
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afs.fs_old_nsect, afs.fs_old_npsect, afs.fs_old_spc);
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break;
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default:
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goto err;
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}
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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("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("metaspace %jd\tavgfpdir %d\tavgfilesize %d\n",
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afs.fs_metaspace, afs.fs_avgfpdir, afs.fs_avgfilesize);
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printf("flags\t");
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if (afs.fs_old_flags & FS_FLAGS_UPDATED)
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fsflags = afs.fs_flags;
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else
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fsflags = afs.fs_old_flags;
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if (fsflags == 0)
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printf("none");
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if (fsflags & FS_UNCLEAN)
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printf("unclean ");
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if (fsflags & FS_DOSOFTDEP)
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printf("soft-updates%s ", (fsflags & FS_SUJ) ? "+journal" : "");
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if (fsflags & FS_NEEDSFSCK)
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printf("needs fsck run ");
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if (fsflags & FS_INDEXDIRS)
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printf("indexed directories ");
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if (fsflags & FS_ACLS)
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printf("acls ");
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if (fsflags & FS_MULTILABEL)
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printf("multilabel ");
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if (fsflags & FS_GJOURNAL)
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printf("gjournal ");
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if (fsflags & FS_FLAGS_UPDATED)
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printf("fs_flags expanded ");
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if (fsflags & FS_NFS4ACLS)
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printf("nfsv4acls ");
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if (fsflags & FS_TRIM)
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printf("trim ");
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fsflags &= ~(FS_UNCLEAN | FS_DOSOFTDEP | FS_NEEDSFSCK | FS_INDEXDIRS |
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FS_ACLS | FS_MULTILABEL | FS_GJOURNAL | FS_FLAGS_UPDATED |
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FS_NFS4ACLS | FS_SUJ | FS_TRIM);
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if (fsflags != 0)
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printf("unknown flags (%#x)", fsflags);
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putchar('\n');
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printf("fsmnt\t%s\n", afs.fs_fsmnt);
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printf("volname\t%s\tswuid\t%ju\tprovidersize\t%ju\n",
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afs.fs_volname, (uintmax_t)afs.fs_swuid,
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(uintmax_t)afs.fs_providersize);
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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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if (bread(&disk, fsbtodb(&afs, afs.fs_csaddr), afs.fs_csp, afs.fs_cssize) == -1)
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goto err;
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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 (fssize % afs.fs_fpg) {
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if (disk.d_ufs == 1)
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printf("cylinders in last group %d\n",
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howmany(afs.fs_old_size % afs.fs_fpg,
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afs.fs_old_spc / afs.fs_old_nspf));
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printf("blocks in last group %ld\n\n",
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(long)((fssize % afs.fs_fpg) / afs.fs_frag));
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}
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while ((i = cgread(&disk)) != 0) {
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if (i == -1 || dumpcg())
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goto err;
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}
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return (0);
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err: ufserr(name);
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return (1);
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}
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static int
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dumpcg(void)
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{
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time_t cgtime;
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off_t cur;
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int i, j;
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printf("\ncg %d:\n", disk.d_lcg);
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cur = fsbtodb(&afs, cgtod(&afs, disk.d_lcg)) * disk.d_bsize;
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switch (disk.d_ufs) {
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case 2:
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cgtime = acg.cg_time;
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printf("magic\t%x\ttell\t%jx\ttime\t%s",
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acg.cg_magic, (intmax_t)cur, ctime(&cgtime));
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printf("cgx\t%d\tndblk\t%d\tniblk\t%d\tinitiblk %d\tunrefs %d\n",
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acg.cg_cgx, acg.cg_ndblk, acg.cg_niblk, acg.cg_initediblk,
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acg.cg_unrefs);
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break;
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case 1:
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cgtime = acg.cg_old_time;
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printf("magic\t%x\ttell\t%jx\ttime\t%s",
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acg.cg_magic, (intmax_t)cur, ctime(&cgtime));
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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_old_ncyl, acg.cg_old_niblk,
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acg.cg_ndblk);
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break;
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default:
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break;
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}
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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("inodes used:\t");
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pbits(cg_inosused(&acg), afs.fs_ipg);
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printf("blks free:\t");
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pbits(cg_blksfree(&acg), afs.fs_fpg);
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return (0);
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}
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static int
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dumpfreespace(const char *name, int fflag)
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{
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int i;
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while ((i = cgread(&disk)) != 0) {
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if (i == -1)
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goto err;
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dumpfreespacecg(fflag);
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}
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return (0);
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err:
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ufserr(name);
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return (1);
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}
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static void
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dumpfreespacecg(int fflag)
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{
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pblklist(cg_blksfree(&acg), afs.fs_fpg, disk.d_lcg * afs.fs_fpg,
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fflag);
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}
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static int
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marshal(const char *name)
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{
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struct fs *fs;
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|
fs = &disk.d_fs;
|
|
|
|
printf("# newfs command for %s (%s)\n", name, disk.d_name);
|
|
printf("newfs ");
|
|
if (fs->fs_volname[0] != '\0')
|
|
printf("-L %s ", fs->fs_volname);
|
|
printf("-O %d ", disk.d_ufs);
|
|
if (fs->fs_flags & FS_DOSOFTDEP)
|
|
printf("-U ");
|
|
printf("-a %d ", fs->fs_maxcontig);
|
|
printf("-b %d ", fs->fs_bsize);
|
|
/* -c is dumb */
|
|
printf("-d %d ", fs->fs_maxbsize);
|
|
printf("-e %d ", fs->fs_maxbpg);
|
|
printf("-f %d ", fs->fs_fsize);
|
|
printf("-g %d ", fs->fs_avgfilesize);
|
|
printf("-h %d ", fs->fs_avgfpdir);
|
|
/* -i is dumb */
|
|
if (fs->fs_flags & FS_SUJ)
|
|
printf("-j ");
|
|
if (fs->fs_flags & FS_GJOURNAL)
|
|
printf("-J ");
|
|
/* -k..l unimplemented */
|
|
printf("-m %d ", fs->fs_minfree);
|
|
/* -n unimplemented */
|
|
printf("-o ");
|
|
switch (fs->fs_optim) {
|
|
case FS_OPTSPACE:
|
|
printf("space ");
|
|
break;
|
|
case FS_OPTTIME:
|
|
printf("time ");
|
|
break;
|
|
default:
|
|
printf("unknown ");
|
|
break;
|
|
}
|
|
/* -p..r unimplemented */
|
|
printf("-s %jd ", (intmax_t)fsbtodb(fs, fs->fs_size));
|
|
if (fs->fs_flags & FS_TRIM)
|
|
printf("-t ");
|
|
printf("%s ", disk.d_name);
|
|
printf("\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
pbits(void *vp, int max)
|
|
{
|
|
int i;
|
|
char *p;
|
|
int count, j;
|
|
|
|
for (count = i = 0, p = vp; i < max; i++)
|
|
if (isset(p, i)) {
|
|
if (count)
|
|
printf(",%s", count % 6 ? " " : "\n\t");
|
|
count++;
|
|
printf("%d", i);
|
|
j = i;
|
|
while ((i+1)<max && isset(p, i+1))
|
|
i++;
|
|
if (i != j)
|
|
printf("-%d", i);
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
static void
|
|
pblklist(void *vp, int max, off_t offset, int fflag)
|
|
{
|
|
int i, j;
|
|
char *p;
|
|
|
|
for (i = 0, p = vp; i < max; i++) {
|
|
if (isset(p, i)) {
|
|
printf("%jd", (intmax_t)(i + offset));
|
|
if (fflag < 2) {
|
|
j = i;
|
|
while ((i+1)<max && isset(p, i+1))
|
|
i++;
|
|
if (i != j)
|
|
printf("-%jd", (intmax_t)(i + offset));
|
|
}
|
|
printf("\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
ufserr(const char *name)
|
|
{
|
|
if (disk.d_error != NULL)
|
|
warnx("%s: %s", name, disk.d_error);
|
|
else if (errno)
|
|
warn("%s", name);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
(void)fprintf(stderr, "usage: dumpfs [-flm] filesys | device\n");
|
|
exit(1);
|
|
}
|