72f854ce8f
check-hash after making changes to the cylinder group. The problem was that the journal-recovery code was calling the libufs bwrite() function instead of the cgput() function. The cgput() function updates the cylinder-group check-hash before writing the cylinder group. This change required the additions of the cgget() and cgput() functions to the libufs API to avoid a gratuitous bcopy of every cylinder group to be read or written. These new functions have been added to the libufs manual pages. This was the first opportunity that I have had to use and document the use of the EDOOFUS error code. Reviewed by: kib Reported by: emaste and others
269 lines
6.6 KiB
C
269 lines
6.6 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2003 Juli Mallett. All rights reserved.
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*
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* This software was written by Juli Mallett <jmallett@FreeBSD.org> for the
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* FreeBSD project. Redistribution and use in source and binary forms, with
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* or without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistribution of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistribution 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/disklabel.h>
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#include <sys/stat.h>
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#include <ufs/ufs/ufsmount.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.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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#include <libufs.h>
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ufs2_daddr_t
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cgballoc(struct uufsd *disk)
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{
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u_int8_t *blksfree;
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struct cg *cgp;
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struct fs *fs;
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long bno;
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fs = &disk->d_fs;
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cgp = &disk->d_cg;
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blksfree = cg_blksfree(cgp);
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for (bno = 0; bno < fs->fs_fpg / fs->fs_frag; bno++)
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if (ffs_isblock(fs, blksfree, bno))
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goto gotit;
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return (0);
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gotit:
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fs->fs_cs(fs, cgp->cg_cgx).cs_nbfree--;
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ffs_clrblock(fs, blksfree, (long)bno);
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ffs_clusteracct(fs, cgp, bno, -1);
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cgp->cg_cs.cs_nbfree--;
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fs->fs_cstotal.cs_nbfree--;
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fs->fs_fmod = 1;
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return (cgbase(fs, cgp->cg_cgx) + blkstofrags(fs, bno));
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}
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int
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cgbfree(struct uufsd *disk, ufs2_daddr_t bno, long size)
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{
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u_int8_t *blksfree;
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struct fs *fs;
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struct cg *cgp;
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ufs1_daddr_t fragno, cgbno;
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int i, cg, blk, frags, bbase;
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fs = &disk->d_fs;
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cg = dtog(fs, bno);
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if (cgread1(disk, cg) != 1)
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return (-1);
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cgp = &disk->d_cg;
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cgbno = dtogd(fs, bno);
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blksfree = cg_blksfree(cgp);
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if (size == fs->fs_bsize) {
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fragno = fragstoblks(fs, cgbno);
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ffs_setblock(fs, blksfree, fragno);
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ffs_clusteracct(fs, cgp, fragno, 1);
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cgp->cg_cs.cs_nbfree++;
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fs->fs_cstotal.cs_nbfree++;
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fs->fs_cs(fs, cg).cs_nbfree++;
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} else {
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bbase = cgbno - fragnum(fs, cgbno);
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/*
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* decrement the counts associated with the old frags
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*/
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blk = blkmap(fs, blksfree, bbase);
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ffs_fragacct(fs, blk, cgp->cg_frsum, -1);
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/*
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* deallocate the fragment
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*/
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frags = numfrags(fs, size);
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for (i = 0; i < frags; i++)
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setbit(blksfree, cgbno + i);
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cgp->cg_cs.cs_nffree += i;
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fs->fs_cstotal.cs_nffree += i;
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fs->fs_cs(fs, cg).cs_nffree += i;
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/*
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* add back in counts associated with the new frags
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*/
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blk = blkmap(fs, blksfree, bbase);
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ffs_fragacct(fs, blk, cgp->cg_frsum, 1);
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/*
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* if a complete block has been reassembled, account for it
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*/
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fragno = fragstoblks(fs, bbase);
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if (ffs_isblock(fs, blksfree, fragno)) {
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cgp->cg_cs.cs_nffree -= fs->fs_frag;
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fs->fs_cstotal.cs_nffree -= fs->fs_frag;
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fs->fs_cs(fs, cg).cs_nffree -= fs->fs_frag;
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ffs_clusteracct(fs, cgp, fragno, 1);
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cgp->cg_cs.cs_nbfree++;
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fs->fs_cstotal.cs_nbfree++;
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fs->fs_cs(fs, cg).cs_nbfree++;
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}
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}
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return cgwrite(disk);
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}
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ino_t
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cgialloc(struct uufsd *disk)
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{
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struct ufs2_dinode *dp2;
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u_int8_t *inosused;
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struct cg *cgp;
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struct fs *fs;
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ino_t ino;
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int i;
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fs = &disk->d_fs;
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cgp = &disk->d_cg;
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inosused = cg_inosused(cgp);
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for (ino = 0; ino < fs->fs_ipg; ino++)
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if (isclr(inosused, ino))
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goto gotit;
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return (0);
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gotit:
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if (fs->fs_magic == FS_UFS2_MAGIC &&
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ino + INOPB(fs) > cgp->cg_initediblk &&
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cgp->cg_initediblk < cgp->cg_niblk) {
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char block[MAXBSIZE];
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bzero(block, (int)fs->fs_bsize);
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dp2 = (struct ufs2_dinode *)█
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for (i = 0; i < INOPB(fs); i++) {
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dp2->di_gen = arc4random();
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dp2++;
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}
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if (bwrite(disk, ino_to_fsba(fs,
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cgp->cg_cgx * fs->fs_ipg + cgp->cg_initediblk),
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block, fs->fs_bsize))
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return (0);
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cgp->cg_initediblk += INOPB(fs);
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}
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setbit(inosused, ino);
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cgp->cg_irotor = ino;
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cgp->cg_cs.cs_nifree--;
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fs->fs_cstotal.cs_nifree--;
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fs->fs_cs(fs, cgp->cg_cgx).cs_nifree--;
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fs->fs_fmod = 1;
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return (ino + (cgp->cg_cgx * fs->fs_ipg));
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}
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int
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cgread(struct uufsd *disk)
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{
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if (disk->d_ccg >= disk->d_fs.fs_ncg)
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return (0);
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return (cgread1(disk, disk->d_ccg++));
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}
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int
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cgread1(struct uufsd *disk, int c)
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{
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if ((cgget(disk, c, &disk->d_cg)) == 0)
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return (1);
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return (-1);
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}
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int
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cgget(struct uufsd *disk, int cg, struct cg *cgp)
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{
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struct fs *fs;
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uint32_t cghash, calchash;
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fs = &disk->d_fs;
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if (bread(disk, fsbtodb(fs, cgtod(fs, cg)), (void *)cgp,
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fs->fs_cgsize) == -1) {
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ERROR(disk, "unable to read cylinder group");
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return (-1);
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}
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calchash = cgp->cg_ckhash;
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if ((fs->fs_metackhash & CK_CYLGRP) != 0) {
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cghash = cgp->cg_ckhash;
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cgp->cg_ckhash = 0;
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calchash = calculate_crc32c(~0L, (void *)cgp, fs->fs_cgsize);
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cgp->cg_ckhash = cghash;
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}
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if (cgp->cg_ckhash != calchash || !cg_chkmagic(cgp) ||
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cgp->cg_cgx != cg) {
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ERROR(disk, "cylinder group checks failed");
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errno = EIO;
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return (-1);
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}
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disk->d_lcg = cg;
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return (0);
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}
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int
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cgwrite(struct uufsd *disk)
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{
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return (cgput(disk, &disk->d_cg));
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}
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int
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cgwrite1(struct uufsd *disk, int cg)
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{
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static char errmsg[BUFSIZ];
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if (cg == disk->d_cg.cg_cgx)
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return (cgput(disk, &disk->d_cg));
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snprintf(errmsg, BUFSIZ, "Cylinder group %d in buffer does not match "
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"the cylinder group %d that cgwrite1 requested",
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disk->d_cg.cg_cgx, cg);
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ERROR(disk, errmsg);
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errno = EDOOFUS;
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return (-1);
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}
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int
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cgput(struct uufsd *disk, struct cg *cgp)
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{
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struct fs *fs;
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fs = &disk->d_fs;
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if ((fs->fs_metackhash & CK_CYLGRP) != 0) {
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cgp->cg_ckhash = 0;
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cgp->cg_ckhash =
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calculate_crc32c(~0L, (void *)cgp, fs->fs_cgsize);
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}
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if (bwrite(disk, fsbtodb(fs, cgtod(fs, cgp->cg_cgx)), cgp,
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fs->fs_cgsize) == -1) {
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ERROR(disk, "unable to write cylinder group");
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return (-1);
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}
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return (0);
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}
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