75e3597abb
check hash to cylinder groups. If a check hash fails when a cylinder
group is read, no further allocations are attempted in that cylinder
group until it has been fixed by fsck. This avoids a class of
filesystem panics related to corrupted cylinder group maps. The
hash is done using crc32c.
Check hases are added only to UFS2 and not to UFS1 as UFS1 is primarily
used in embedded systems with small memories and low-powered processors
which need as light-weight a filesystem as possible.
Specifics of the changes:
sys/sys/buf.h:
Add BX_FSPRIV to reserve a set of eight b_xflags that may be used
by individual filesystems for their own purpose. Their specific
definitions are found in the header files for each filesystem
that uses them. Also add fields to struct buf as noted below.
sys/kern/vfs_bio.c:
It is only necessary to compute a check hash for a cylinder
group when it is actually read from disk. When calling bread,
you do not know whether the buffer was found in the cache or
read. So a new flag (GB_CKHASH) and a pointer to a function to
perform the hash has been added to breadn_flags to say that the
function should be called to calculate a hash if the data has
been read. The check hash is placed in b_ckhash and the B_CKHASH
flag is set to indicate that a read was done and a check hash
calculated. Though a rather elaborate mechanism, it should
also work for check hashing other metadata in the future. A
kernel internal API change was to change breada into a static
fucntion and add flags and a function pointer to a check-hash
function.
sys/ufs/ffs/fs.h:
Add flags for types of check hashes; stored in a new word in the
superblock. Define corresponding BX_ flags for the different types
of check hashes. Add a check hash word in the cylinder group.
sys/ufs/ffs/ffs_alloc.c:
In ffs_getcg do the dance with breadn_flags to get a check hash and
if one is provided, check it.
sys/ufs/ffs/ffs_vfsops.c:
Copy across the BX_FFSTYPES flags in background writes.
Update the check hash when writing out buffers that need them.
sys/ufs/ffs/ffs_snapshot.c:
Recompute check hash when updating snapshot cylinder groups.
sys/libkern/crc32.c:
lib/libufs/Makefile:
lib/libufs/libufs.h:
lib/libufs/cgroup.c:
Include libkern/crc32.c in libufs and use it to compute check
hashes when updating cylinder groups.
Four utilities are affected:
sbin/newfs/mkfs.c:
Add the check hashes when building the cylinder groups.
sbin/fsck_ffs/fsck.h:
sbin/fsck_ffs/fsutil.c:
Verify and update check hashes when checking and writing cylinder groups.
sbin/fsck_ffs/pass5.c:
Offer to add check hashes to existing filesystems.
Precompute check hashes when rebuilding cylinder group
(although this will be done when it is written in fsutil.c
it is necessary to do it early before comparing with the old
cylinder group)
sbin/dumpfs/dumpfs.c
Print out the new check hash flag(s)
sbin/fsdb/Makefile:
Needs to add libufs now used by pass5.c imported from fsck_ffs.
Reviewed by: kib
Tested by: Peter Holm (pho)
528 lines
14 KiB
C
528 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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* 3. 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[ %08x %08x ]\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("check hashes\t");
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fsflags = afs.fs_metackhash;
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if (fsflags == 0)
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printf("none");
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if (fsflags & CK_SUPERBLOCK)
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printf("superblock ");
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if (fsflags & CK_CYLGRP)
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printf("cylinder-groups ");
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if (fsflags & CK_INODE)
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printf("inodes ");
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if (fsflags & CK_INDIR)
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printf("indirect-blocks ");
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if (fsflags & CK_DIR)
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printf("directories ");
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fsflags &= ~(CK_SUPERBLOCK | CK_CYLGRP | CK_INODE | CK_INDIR | CK_DIR);
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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",
|
|
acg.cg_rotor, acg.cg_irotor, acg.cg_frotor);
|
|
for (i = 1, j = 0; i < afs.fs_frag; i++) {
|
|
printf("\t%d", acg.cg_frsum[i]);
|
|
j += i * acg.cg_frsum[i];
|
|
}
|
|
printf("\nsum of frsum: %d", j);
|
|
if (afs.fs_contigsumsize > 0) {
|
|
for (i = 1; i < afs.fs_contigsumsize; i++) {
|
|
if ((i - 1) % 8 == 0)
|
|
printf("\nclusters %d-%d:", i,
|
|
MIN(afs.fs_contigsumsize - 1, i + 7));
|
|
printf("\t%d", cg_clustersum(&acg)[i]);
|
|
}
|
|
printf("\nclusters size %d and over: %d\n",
|
|
afs.fs_contigsumsize,
|
|
cg_clustersum(&acg)[afs.fs_contigsumsize]);
|
|
printf("clusters free:\t");
|
|
pbits(cg_clustersfree(&acg), acg.cg_nclusterblks);
|
|
} else
|
|
printf("\n");
|
|
printf("inodes used:\t");
|
|
pbits(cg_inosused(&acg), afs.fs_ipg);
|
|
printf("blks free:\t");
|
|
pbits(cg_blksfree(&acg), afs.fs_fpg);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
dumpfreespace(const char *name, int fflag)
|
|
{
|
|
int i;
|
|
|
|
while ((i = cgread(&disk)) != 0) {
|
|
if (i == -1)
|
|
goto err;
|
|
dumpfreespacecg(fflag);
|
|
}
|
|
return (0);
|
|
err:
|
|
ufserr(name);
|
|
return (1);
|
|
}
|
|
|
|
static void
|
|
dumpfreespacecg(int fflag)
|
|
{
|
|
|
|
pblklist(cg_blksfree(&acg), afs.fs_fpg, disk.d_lcg * afs.fs_fpg,
|
|
fflag);
|
|
}
|
|
|
|
static int
|
|
marshal(const char *name)
|
|
{
|
|
struct fs *fs;
|
|
|
|
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);
|
|
printf("-i %jd ", fragroundup(fs, lblktosize(fs, fragstoblks(fs,
|
|
fs->fs_fpg)) / fs->fs_ipg));
|
|
if (fs->fs_flags & FS_SUJ)
|
|
printf("-j ");
|
|
if (fs->fs_flags & FS_GJOURNAL)
|
|
printf("-J ");
|
|
printf("-k %jd ", fs->fs_metaspace);
|
|
if (fs->fs_flags & FS_MULTILABEL)
|
|
printf("-l ");
|
|
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);
|
|
}
|