1c85e6a35d
filesystem expands the inode to 256 bytes to make space for 64-bit block pointers. It also adds a file-creation time field, an ability to use jumbo blocks per inode to allow extent like pointer density, and space for extended attributes (up to twice the filesystem block size worth of attributes, e.g., on a 16K filesystem, there is space for 32K of attributes). UFS2 fully supports and runs existing UFS1 filesystems. New filesystems built using newfs can be built in either UFS1 or UFS2 format using the -O option. In this commit UFS1 is the default format, so if you want to build UFS2 format filesystems, you must specify -O 2. This default will be changed to UFS2 when UFS2 proves itself to be stable. In this commit the boot code for reading UFS2 filesystems is not compiled (see /sys/boot/common/ufsread.c) as there is insufficient space in the boot block. Once the size of the boot block is increased, this code can be defined. Things to note: the definition of SBSIZE has changed to SBLOCKSIZE. The header file <ufs/ufs/dinode.h> must be included before <ufs/ffs/fs.h> so as to get the definitions of ufs2_daddr_t and ufs_lbn_t. Still TODO: Verify that the first level bootstraps work for all the architectures. Convert the utility ffsinfo to understand UFS2 and test growfs. Add support for the extended attribute storage. Update soft updates to ensure integrity of extended attribute storage. Switch the current extended attribute interfaces to use the extended attribute storage. Add the extent like functionality (framework is there, but is currently never used). Sponsored by: DARPA & NAI Labs. Reviewed by: Poul-Henning Kamp <phk@freebsd.org>
311 lines
8.9 KiB
C
311 lines
8.9 KiB
C
/* $OpenBSD: fsirand.c,v 1.9 1997/02/28 00:46:33 millert Exp $ */
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/*
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* Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
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* 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 Todd C. Miller.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef lint
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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/disklabel.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/resource.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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static void usage(void) __dead2;
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int fsirand(char *);
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/*
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* Possible superblock locations ordered from most to least likely.
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*/
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static int sblock_try[] = SBLOCKSEARCH;
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int printonly = 0, force = 0, ignorelabel = 0;
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int
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main(int argc, char *argv[])
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{
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int n, ex = 0;
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struct rlimit rl;
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while ((n = getopt(argc, argv, "bfp")) != -1) {
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switch (n) {
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case 'b':
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ignorelabel++;
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break;
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case 'p':
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printonly++;
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break;
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case 'f':
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force++;
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break;
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default:
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usage();
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}
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}
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if (argc - optind < 1)
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usage();
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srandomdev();
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/* Increase our data size to the max */
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if (getrlimit(RLIMIT_DATA, &rl) == 0) {
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rl.rlim_cur = rl.rlim_max;
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if (setrlimit(RLIMIT_DATA, &rl) < 0)
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warn("can't get resource limit to max data size");
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} else
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warn("can't get resource limit for data size");
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for (n = optind; n < argc; n++) {
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if (argc - optind != 1)
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(void)puts(argv[n]);
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ex += fsirand(argv[n]);
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if (n < argc - 1)
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putchar('\n');
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}
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exit(ex);
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}
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int
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fsirand(char *device)
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{
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struct ufs1_dinode *dp1;
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struct ufs2_dinode *dp2;
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caddr_t inodebuf;
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size_t ibufsize;
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struct fs *sblock;
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ino_t inumber, maxino;
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ufs2_daddr_t sblockloc, dblk;
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char sbuf[SBLOCKSIZE], sbuftmp[SBLOCKSIZE];
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int i, devfd, n, cg;
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u_int32_t bsize = DEV_BSIZE;
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struct disklabel label;
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if ((devfd = open(device, printonly ? O_RDONLY : O_RDWR)) < 0) {
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warn("can't open %s", device);
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return (1);
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}
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/* Get block size (usually 512) from disklabel if possible */
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if (!ignorelabel) {
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if (ioctl(devfd, DIOCGDINFO, &label) < 0)
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warn("can't read disklabel, using sector size of %d",
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bsize);
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else
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bsize = label.d_secsize;
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}
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/* Read in master superblock */
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(void)memset(&sbuf, 0, sizeof(sbuf));
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sblock = (struct fs *)&sbuf;
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for (i = 0; sblock_try[i] != -1; i++) {
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sblockloc = sblock_try[i];
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if (lseek(devfd, sblockloc, SEEK_SET) == -1) {
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warn("can't seek to superblock (%qd) on %s",
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sblockloc, device);
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return (1);
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}
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if ((n = read(devfd, (void *)sblock, SBLOCKSIZE))!=SBLOCKSIZE) {
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warnx("can't read superblock on %s: %s", device,
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(n < SBLOCKSIZE) ? "short read" : strerror(errno));
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return (1);
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}
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if ((sblock->fs_magic == FS_UFS1_MAGIC ||
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(sblock->fs_magic == FS_UFS2_MAGIC &&
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sblock->fs_sblockloc ==
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numfrags(sblock, sblock_try[i]))) &&
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sblock->fs_bsize <= MAXBSIZE &&
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sblock->fs_bsize >= sizeof(struct fs))
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break;
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}
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if (sblock_try[i] == -1) {
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fprintf(stderr, "Cannot find filesystem superblock\n");
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return (1);
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}
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maxino = sblock->fs_ncg * sblock->fs_ipg;
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if (sblock->fs_magic == FS_UFS1_MAGIC &&
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sblock->fs_old_inodefmt < FS_44INODEFMT) {
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warnx("filesystem format is too old, sorry");
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return (1);
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}
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if (!force && !printonly && sblock->fs_clean != 1) {
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warnx("filesystem is not clean, fsck %s first", device);
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return (1);
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}
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/* Make sure backup superblocks are sane. */
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sblock = (struct fs *)&sbuftmp;
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for (cg = 0; cg < sblock->fs_ncg; cg++) {
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dblk = fsbtodb(sblock, cgsblock(sblock, cg));
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if (lseek(devfd, (off_t)dblk * bsize, SEEK_SET) < 0) {
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warn("can't seek to %qd", (off_t)dblk * bsize);
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return (1);
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} else if ((n = write(devfd, (void *)sblock, SBLOCKSIZE)) != SBLOCKSIZE) {
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warn("can't read backup superblock %d on %s: %s",
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cg + 1, device, (n < SBLOCKSIZE) ? "short write"
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: strerror(errno));
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return (1);
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}
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if (sblock->fs_magic != FS_UFS1_MAGIC &&
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sblock->fs_magic != FS_UFS2_MAGIC) {
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warnx("bad magic number in backup superblock %d on %s",
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cg + 1, device);
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return (1);
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}
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if (sblock->fs_sbsize > SBLOCKSIZE) {
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warnx("size of backup superblock %d on %s is preposterous",
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cg + 1, device);
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return (1);
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}
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}
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sblock = (struct fs *)&sbuf;
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/* XXX - should really cap buffer at 512kb or so */
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if (sblock->fs_magic == FS_UFS1_MAGIC)
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ibufsize = sizeof(struct ufs1_dinode) * sblock->fs_ipg;
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else
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ibufsize = sizeof(struct ufs2_dinode) * sblock->fs_ipg;
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if ((inodebuf = malloc(ibufsize)) == NULL)
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errx(1, "can't allocate memory for inode buffer");
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if (printonly && (sblock->fs_id[0] || sblock->fs_id[1])) {
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if (sblock->fs_id[0])
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(void)printf("%s was randomized on %s", device,
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ctime((const time_t *)&(sblock->fs_id[0])));
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(void)printf("fsid: %x %x\n", sblock->fs_id[0],
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sblock->fs_id[1]);
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}
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/* Randomize fs_id unless old 4.2BSD filesystem */
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if (!printonly) {
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/* Randomize fs_id and write out new sblock and backups */
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sblock->fs_id[0] = (u_int32_t)time(NULL);
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sblock->fs_id[1] = random();
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if (lseek(devfd, sblockloc, SEEK_SET) == -1) {
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warn("can't seek to superblock (%qd) on %s", sblockloc,
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device);
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return (1);
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}
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if ((n = write(devfd, (void *)sblock, SBLOCKSIZE)) !=
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SBLOCKSIZE) {
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warn("can't write superblock on %s: %s", device,
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(n < SBLOCKSIZE) ? "short write" : strerror(errno));
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return (1);
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}
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}
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/* For each cylinder group, randomize inodes and update backup sblock */
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for (cg = 0, inumber = 0; cg < sblock->fs_ncg; cg++) {
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/* Update superblock if appropriate */
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if (!printonly) {
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dblk = fsbtodb(sblock, cgsblock(sblock, cg));
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if (lseek(devfd, (off_t)dblk * bsize, SEEK_SET) < 0) {
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warn("can't seek to %qd", (off_t)dblk * bsize);
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return (1);
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} else if ((n = write(devfd, (void *)sblock,
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SBLOCKSIZE)) != SBLOCKSIZE) {
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warn("can't write backup superblock %d on %s: %s",
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cg + 1, device, (n < SBLOCKSIZE) ?
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"short write" : strerror(errno));
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return (1);
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}
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}
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/* Read in inodes, then print or randomize generation nums */
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dblk = fsbtodb(sblock, ino_to_fsba(sblock, inumber));
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if (lseek(devfd, (off_t)dblk * bsize, SEEK_SET) < 0) {
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warn("can't seek to %qd", (off_t)dblk * bsize);
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return (1);
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} else if ((n = read(devfd, inodebuf, ibufsize)) != ibufsize) {
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warnx("can't read inodes: %s",
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(n < ibufsize) ? "short read" : strerror(errno));
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return (1);
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}
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for (n = 0; n < sblock->fs_ipg; n++, inumber++) {
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if (sblock->fs_magic == FS_UFS1_MAGIC)
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dp1 = &((struct ufs1_dinode *)inodebuf)[n];
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else
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dp2 = &((struct ufs2_dinode *)inodebuf)[n];
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if (inumber >= ROOTINO) {
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if (printonly)
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(void)printf("ino %d gen %qx\n",
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inumber,
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sblock->fs_magic == FS_UFS1_MAGIC ?
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(quad_t)dp1->di_gen : dp2->di_gen);
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else
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(sblock->fs_magic == FS_UFS1_MAGIC ?
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dp1->di_gen : dp2->di_gen) = random();
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}
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}
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/* Write out modified inodes */
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if (!printonly) {
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if (lseek(devfd, (off_t)dblk * bsize, SEEK_SET) < 0) {
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warn("can't seek to %qd",
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(off_t)dblk * bsize);
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return (1);
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} else if ((n = write(devfd, inodebuf, ibufsize)) !=
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ibufsize) {
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warnx("can't write inodes: %s",
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(n != ibufsize) ? "short write" :
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strerror(errno));
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return (1);
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}
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}
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}
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(void)close(devfd);
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return(0);
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr,
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"usage: fsirand [-b] [-f] [-p] special [special ...]\n");
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exit(1);
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}
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