d33e92f93e
Submitted by: Kirk McKusick <mckusick@McKusick.COM> Obtained from: Mckusick, BSDI and a host of others This exactly matches Kirks sources imported under the Tag MCKUSICK2. These are as supplied by kirk with one small change needed to compile under freeBSD. Some FreeBSD patches will be added back, though many have been added to Kirk's sources already.
662 lines
16 KiB
C
662 lines
16 KiB
C
/*
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* Copyright (c) 1980, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char sccsid[] = "@(#)inode.c 8.8 (Berkeley) 4/28/95";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/time.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ufs/dir.h>
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#include <ufs/ffs/fs.h>
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#include <err.h>
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#include <pwd.h>
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#include <string.h>
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#include "fsck.h"
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static ino_t startinum;
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static int iblock __P((struct inodesc *, long ilevel, quad_t isize));
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int
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ckinode(dp, idesc)
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struct dinode *dp;
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register struct inodesc *idesc;
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{
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ufs_daddr_t *ap;
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int ret;
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long n, ndb, offset;
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struct dinode dino;
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quad_t remsize, sizepb;
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mode_t mode;
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char pathbuf[MAXPATHLEN + 1];
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if (idesc->id_fix != IGNORE)
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idesc->id_fix = DONTKNOW;
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idesc->id_entryno = 0;
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idesc->id_filesize = dp->di_size;
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mode = dp->di_mode & IFMT;
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if (mode == IFBLK || mode == IFCHR || (mode == IFLNK &&
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dp->di_size < (unsigned)sblock.fs_maxsymlinklen))
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return (KEEPON);
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dino = *dp;
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ndb = howmany(dino.di_size, sblock.fs_bsize);
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for (ap = &dino.di_db[0]; ap < &dino.di_db[NDADDR]; ap++) {
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if (--ndb == 0 && (offset = blkoff(&sblock, dino.di_size)) != 0)
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idesc->id_numfrags =
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numfrags(&sblock, fragroundup(&sblock, offset));
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else
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idesc->id_numfrags = sblock.fs_frag;
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if (*ap == 0) {
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if (idesc->id_type == DATA && ndb >= 0) {
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/* An empty block in a directory XXX */
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getpathname(pathbuf, idesc->id_number,
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idesc->id_number);
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pfatal("DIRECTORY %s: CONTAINS EMPTY BLOCKS",
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pathbuf);
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if (reply("ADJUST LENGTH") == 1) {
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dp = ginode(idesc->id_number);
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dp->di_size = (ap - &dino.di_db[0]) *
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sblock.fs_bsize;
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printf(
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"YOU MUST RERUN FSCK AFTERWARDS\n");
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rerun = 1;
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inodirty();
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}
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}
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continue;
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}
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idesc->id_blkno = *ap;
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if (idesc->id_type == ADDR)
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ret = (*idesc->id_func)(idesc);
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else
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ret = dirscan(idesc);
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if (ret & STOP)
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return (ret);
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}
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idesc->id_numfrags = sblock.fs_frag;
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remsize = dino.di_size - sblock.fs_bsize * NDADDR;
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sizepb = sblock.fs_bsize;
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for (ap = &dino.di_ib[0], n = 1; n <= NIADDR; ap++, n++) {
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if (*ap) {
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idesc->id_blkno = *ap;
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ret = iblock(idesc, n, remsize);
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if (ret & STOP)
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return (ret);
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} else {
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if (idesc->id_type == DATA && remsize > 0) {
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/* An empty block in a directory XXX */
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getpathname(pathbuf, idesc->id_number,
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idesc->id_number);
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pfatal("DIRECTORY %s: CONTAINS EMPTY BLOCKS",
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pathbuf);
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if (reply("ADJUST LENGTH") == 1) {
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dp = ginode(idesc->id_number);
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dp->di_size -= remsize;
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remsize = 0;
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printf(
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"YOU MUST RERUN FSCK AFTERWARDS\n");
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rerun = 1;
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inodirty();
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break;
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}
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}
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}
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sizepb *= NINDIR(&sblock);
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remsize -= sizepb;
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}
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return (KEEPON);
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}
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static int
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iblock(idesc, ilevel, isize)
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struct inodesc *idesc;
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long ilevel;
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quad_t isize;
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{
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ufs_daddr_t *ap;
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ufs_daddr_t *aplim;
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struct bufarea *bp;
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int i, n, (*func)(), nif;
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quad_t sizepb;
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char buf[BUFSIZ];
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char pathbuf[MAXPATHLEN + 1];
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struct dinode *dp;
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if (idesc->id_type == ADDR) {
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func = idesc->id_func;
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if (((n = (*func)(idesc)) & KEEPON) == 0)
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return (n);
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} else
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func = dirscan;
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if (chkrange(idesc->id_blkno, idesc->id_numfrags))
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return (SKIP);
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bp = getdatablk(idesc->id_blkno, sblock.fs_bsize);
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ilevel--;
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for (sizepb = sblock.fs_bsize, i = 0; i < ilevel; i++)
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sizepb *= NINDIR(&sblock);
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nif = howmany(isize , sizepb);
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if (nif > NINDIR(&sblock))
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nif = NINDIR(&sblock);
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if (idesc->id_func == pass1check && nif < NINDIR(&sblock)) {
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aplim = &bp->b_un.b_indir[NINDIR(&sblock)];
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for (ap = &bp->b_un.b_indir[nif]; ap < aplim; ap++) {
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if (*ap == 0)
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continue;
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(void)sprintf(buf, "PARTIALLY TRUNCATED INODE I=%lu",
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(u_long)idesc->id_number);
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if (dofix(idesc, buf)) {
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*ap = 0;
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dirty(bp);
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}
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}
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flush(fswritefd, bp);
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}
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aplim = &bp->b_un.b_indir[nif];
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for (ap = bp->b_un.b_indir; ap < aplim; ap++) {
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if (*ap) {
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idesc->id_blkno = *ap;
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if (ilevel == 0)
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n = (*func)(idesc);
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else
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n = iblock(idesc, ilevel, isize);
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if (n & STOP) {
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bp->b_flags &= ~B_INUSE;
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return (n);
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}
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} else {
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if (idesc->id_type == DATA && isize > 0) {
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/* An empty block in a directory XXX */
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getpathname(pathbuf, idesc->id_number,
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idesc->id_number);
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pfatal("DIRECTORY %s: CONTAINS EMPTY BLOCKS",
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pathbuf);
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if (reply("ADJUST LENGTH") == 1) {
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dp = ginode(idesc->id_number);
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dp->di_size -= isize;
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isize = 0;
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printf(
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"YOU MUST RERUN FSCK AFTERWARDS\n");
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rerun = 1;
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inodirty();
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bp->b_flags &= ~B_INUSE;
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return(STOP);
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}
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}
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}
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isize -= sizepb;
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}
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bp->b_flags &= ~B_INUSE;
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return (KEEPON);
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}
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/*
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* Check that a block in a legal block number.
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* Return 0 if in range, 1 if out of range.
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*/
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int
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chkrange(blk, cnt)
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ufs_daddr_t blk;
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int cnt;
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{
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register int c;
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if (cnt <= 0 || blk <= 0 || blk > maxfsblock ||
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cnt - 1 > maxfsblock - blk)
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return (1);
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if (cnt > sblock.fs_frag ||
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fragnum(&sblock, blk) + cnt > sblock.fs_frag) {
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if (debug)
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printf("bad size: blk %ld, offset %ld, size %ld\n",
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blk, fragnum(&sblock, blk), cnt);
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return (1);
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}
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c = dtog(&sblock, blk);
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if (blk < cgdmin(&sblock, c)) {
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if ((blk + cnt) > cgsblock(&sblock, c)) {
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if (debug) {
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printf("blk %ld < cgdmin %ld;",
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(long)blk, (long)cgdmin(&sblock, c));
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printf(" blk + cnt %ld > cgsbase %ld\n",
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(long)(blk + cnt),
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(long)cgsblock(&sblock, c));
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}
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return (1);
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}
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} else {
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if ((blk + cnt) > cgbase(&sblock, c+1)) {
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if (debug) {
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printf("blk %ld >= cgdmin %ld;",
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(long)blk, (long)cgdmin(&sblock, c));
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printf(" blk + cnt %ld > sblock.fs_fpg %ld\n",
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(long)(blk + cnt), (long)sblock.fs_fpg);
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}
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return (1);
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}
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}
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return (0);
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}
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/*
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* General purpose interface for reading inodes.
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*/
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struct dinode *
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ginode(inumber)
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ino_t inumber;
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{
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ufs_daddr_t iblk;
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if (inumber < ROOTINO || inumber > maxino)
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errx(EEXIT, "bad inode number %d to ginode", inumber);
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if (startinum == 0 ||
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inumber < startinum || inumber >= startinum + INOPB(&sblock)) {
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iblk = ino_to_fsba(&sblock, inumber);
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if (pbp != 0)
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pbp->b_flags &= ~B_INUSE;
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pbp = getdatablk(iblk, sblock.fs_bsize);
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startinum = (inumber / INOPB(&sblock)) * INOPB(&sblock);
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}
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return (&pbp->b_un.b_dinode[inumber % INOPB(&sblock)]);
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}
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/*
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* Special purpose version of ginode used to optimize first pass
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* over all the inodes in numerical order.
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*/
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ino_t nextino, lastinum;
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long readcnt, readpercg, fullcnt, inobufsize, partialcnt, partialsize;
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struct dinode *inodebuf;
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struct dinode *
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getnextinode(inumber)
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ino_t inumber;
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{
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long size;
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ufs_daddr_t dblk;
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static struct dinode *dp;
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if (inumber != nextino++ || inumber > maxino)
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errx(EEXIT, "bad inode number %d to nextinode", inumber);
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if (inumber >= lastinum) {
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readcnt++;
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dblk = fsbtodb(&sblock, ino_to_fsba(&sblock, lastinum));
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if (readcnt % readpercg == 0) {
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size = partialsize;
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lastinum += partialcnt;
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} else {
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size = inobufsize;
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lastinum += fullcnt;
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}
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/*
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* If bread returns an error, it will already have zeroed
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* out the buffer, so we do not need to do so here.
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*/
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(void)bread(fsreadfd, (char *)inodebuf, dblk, size);
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dp = inodebuf;
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}
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return (dp++);
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}
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void
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setinodebuf(inum)
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ino_t inum;
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{
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if (inum % sblock.fs_ipg != 0)
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errx(EEXIT, "bad inode number %d to setinodebuf", inum);
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startinum = 0;
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nextino = inum;
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lastinum = inum;
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readcnt = 0;
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if (inodebuf != NULL)
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return;
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inobufsize = blkroundup(&sblock, INOBUFSIZE);
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fullcnt = inobufsize / sizeof(struct dinode);
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readpercg = sblock.fs_ipg / fullcnt;
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partialcnt = sblock.fs_ipg % fullcnt;
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partialsize = partialcnt * sizeof(struct dinode);
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if (partialcnt != 0) {
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readpercg++;
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} else {
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partialcnt = fullcnt;
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partialsize = inobufsize;
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}
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if ((inodebuf = (struct dinode *)malloc((unsigned)inobufsize)) == NULL)
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errx(EEXIT, "cannot allocate space for inode buffer");
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}
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void
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freeinodebuf()
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{
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if (inodebuf != NULL)
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free((char *)inodebuf);
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inodebuf = NULL;
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}
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/*
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* Routines to maintain information about directory inodes.
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* This is built during the first pass and used during the
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* second and third passes.
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*
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* Enter inodes into the cache.
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*/
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void
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cacheino(dp, inumber)
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register struct dinode *dp;
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ino_t inumber;
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{
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register struct inoinfo *inp;
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struct inoinfo **inpp;
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int blks;
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blks = howmany(dp->di_size, sblock.fs_bsize);
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if (blks > NDADDR)
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blks = NDADDR + NIADDR;
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inp = (struct inoinfo *)
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malloc(sizeof(*inp) + (blks - 1) * sizeof(ufs_daddr_t));
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if (inp == NULL)
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errx(EEXIT, "cannot increase directory list");
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inpp = &inphead[inumber % numdirs];
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inp->i_nexthash = *inpp;
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*inpp = inp;
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inp->i_parent = inumber == ROOTINO ? ROOTINO : (ino_t)0;
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inp->i_dotdot = (ino_t)0;
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inp->i_number = inumber;
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inp->i_isize = dp->di_size;
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inp->i_numblks = blks * sizeof(ufs_daddr_t);
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memmove(&inp->i_blks[0], &dp->di_db[0], (size_t)inp->i_numblks);
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if (inplast == listmax) {
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listmax += 100;
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inpsort = (struct inoinfo **)realloc((char *)inpsort,
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(unsigned)listmax * sizeof(struct inoinfo *));
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if (inpsort == NULL)
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errx(EEXIT, "cannot increase directory list");
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}
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inpsort[inplast++] = inp;
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}
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/*
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* Look up an inode cache structure.
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*/
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struct inoinfo *
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getinoinfo(inumber)
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ino_t inumber;
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{
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register struct inoinfo *inp;
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for (inp = inphead[inumber % numdirs]; inp; inp = inp->i_nexthash) {
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if (inp->i_number != inumber)
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continue;
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return (inp);
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}
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errx(EEXIT, "cannot find inode %d", inumber);
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return ((struct inoinfo *)0);
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}
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/*
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* Clean up all the inode cache structure.
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*/
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void
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inocleanup()
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{
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register struct inoinfo **inpp;
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if (inphead == NULL)
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return;
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for (inpp = &inpsort[inplast - 1]; inpp >= inpsort; inpp--)
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free((char *)(*inpp));
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free((char *)inphead);
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free((char *)inpsort);
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inphead = inpsort = NULL;
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}
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void
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inodirty()
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{
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dirty(pbp);
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}
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void
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clri(idesc, type, flag)
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register struct inodesc *idesc;
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char *type;
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int flag;
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{
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register struct dinode *dp;
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dp = ginode(idesc->id_number);
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if (flag == 1) {
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pwarn("%s %s", type,
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(dp->di_mode & IFMT) == IFDIR ? "DIR" : "FILE");
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pinode(idesc->id_number);
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}
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if (preen || reply("CLEAR") == 1) {
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if (preen)
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printf(" (CLEARED)\n");
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n_files--;
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(void)ckinode(dp, idesc);
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clearinode(dp);
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inoinfo(idesc->id_number)->ino_state = USTATE;
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inodirty();
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}
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}
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int
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findname(idesc)
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struct inodesc *idesc;
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{
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register struct direct *dirp = idesc->id_dirp;
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if (dirp->d_ino != idesc->id_parent || idesc->id_entryno < 2) {
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idesc->id_entryno++;
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return (KEEPON);
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}
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memmove(idesc->id_name, dirp->d_name, (size_t)dirp->d_namlen + 1);
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return (STOP|FOUND);
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}
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int
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findino(idesc)
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struct inodesc *idesc;
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{
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register struct direct *dirp = idesc->id_dirp;
|
|
|
|
if (dirp->d_ino == 0)
|
|
return (KEEPON);
|
|
if (strcmp(dirp->d_name, idesc->id_name) == 0 &&
|
|
dirp->d_ino >= ROOTINO && dirp->d_ino <= maxino) {
|
|
idesc->id_parent = dirp->d_ino;
|
|
return (STOP|FOUND);
|
|
}
|
|
return (KEEPON);
|
|
}
|
|
|
|
int
|
|
clearentry(idesc)
|
|
struct inodesc *idesc;
|
|
{
|
|
register struct direct *dirp = idesc->id_dirp;
|
|
|
|
if (dirp->d_ino != idesc->id_parent || idesc->id_entryno < 2) {
|
|
idesc->id_entryno++;
|
|
return (KEEPON);
|
|
}
|
|
dirp->d_ino = 0;
|
|
return (STOP|FOUND|ALTERED);
|
|
}
|
|
|
|
void
|
|
pinode(ino)
|
|
ino_t ino;
|
|
{
|
|
register struct dinode *dp;
|
|
register char *p;
|
|
struct passwd *pw;
|
|
time_t t;
|
|
|
|
printf(" I=%lu ", (u_long)ino);
|
|
if (ino < ROOTINO || ino > maxino)
|
|
return;
|
|
dp = ginode(ino);
|
|
printf(" OWNER=");
|
|
if ((pw = getpwuid((int)dp->di_uid)) != 0)
|
|
printf("%s ", pw->pw_name);
|
|
else
|
|
printf("%u ", (unsigned)dp->di_uid);
|
|
printf("MODE=%o\n", dp->di_mode);
|
|
if (preen)
|
|
printf("%s: ", cdevname);
|
|
printf("SIZE=%qu ", dp->di_size);
|
|
t = dp->di_mtime;
|
|
p = ctime(&t);
|
|
printf("MTIME=%12.12s %4.4s ", &p[4], &p[20]);
|
|
}
|
|
|
|
void
|
|
blkerror(ino, type, blk)
|
|
ino_t ino;
|
|
char *type;
|
|
ufs_daddr_t blk;
|
|
{
|
|
|
|
pfatal("%ld %s I=%lu", blk, type, ino);
|
|
printf("\n");
|
|
switch (inoinfo(ino)->ino_state) {
|
|
|
|
case FSTATE:
|
|
inoinfo(ino)->ino_state = FCLEAR;
|
|
return;
|
|
|
|
case DSTATE:
|
|
inoinfo(ino)->ino_state = DCLEAR;
|
|
return;
|
|
|
|
case FCLEAR:
|
|
case DCLEAR:
|
|
return;
|
|
|
|
default:
|
|
errx(EEXIT, "BAD STATE %d TO BLKERR", inoinfo(ino)->ino_state);
|
|
/* NOTREACHED */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* allocate an unused inode
|
|
*/
|
|
ino_t
|
|
allocino(request, type)
|
|
ino_t request;
|
|
int type;
|
|
{
|
|
register ino_t ino;
|
|
register struct dinode *dp;
|
|
struct cg *cgp = &cgrp;
|
|
int cg;
|
|
|
|
if (request == 0)
|
|
request = ROOTINO;
|
|
else if (inoinfo(request)->ino_state != USTATE)
|
|
return (0);
|
|
for (ino = request; ino < maxino; ino++)
|
|
if (inoinfo(ino)->ino_state == USTATE)
|
|
break;
|
|
if (ino == maxino)
|
|
return (0);
|
|
cg = ino_to_cg(&sblock, ino);
|
|
getblk(&cgblk, cgtod(&sblock, cg), sblock.fs_cgsize);
|
|
if (!cg_chkmagic(cgp))
|
|
pfatal("CG %d: BAD MAGIC NUMBER\n", cg);
|
|
setbit(cg_inosused(cgp), ino % sblock.fs_ipg);
|
|
cgp->cg_cs.cs_nifree--;
|
|
switch (type & IFMT) {
|
|
case IFDIR:
|
|
inoinfo(ino)->ino_state = DSTATE;
|
|
cgp->cg_cs.cs_ndir++;
|
|
break;
|
|
case IFREG:
|
|
case IFLNK:
|
|
inoinfo(ino)->ino_state = FSTATE;
|
|
break;
|
|
default:
|
|
return (0);
|
|
}
|
|
cgdirty();
|
|
dp = ginode(ino);
|
|
dp->di_db[0] = allocblk((long)1);
|
|
if (dp->di_db[0] == 0) {
|
|
inoinfo(ino)->ino_state = USTATE;
|
|
return (0);
|
|
}
|
|
dp->di_mode = type;
|
|
dp->di_flags = 0;
|
|
dp->di_atime = time(NULL);
|
|
dp->di_mtime = dp->di_ctime = dp->di_atime;
|
|
dp->di_size = sblock.fs_fsize;
|
|
dp->di_blocks = btodb(sblock.fs_fsize);
|
|
n_files++;
|
|
inodirty();
|
|
if (newinofmt)
|
|
inoinfo(ino)->ino_type = IFTODT(type);
|
|
return (ino);
|
|
}
|
|
|
|
/*
|
|
* deallocate an inode
|
|
*/
|
|
void
|
|
freeino(ino)
|
|
ino_t ino;
|
|
{
|
|
struct inodesc idesc;
|
|
struct dinode *dp;
|
|
|
|
memset(&idesc, 0, sizeof(struct inodesc));
|
|
idesc.id_type = ADDR;
|
|
idesc.id_func = pass4check;
|
|
idesc.id_number = ino;
|
|
dp = ginode(ino);
|
|
(void)ckinode(dp, &idesc);
|
|
clearinode(dp);
|
|
inodirty();
|
|
inoinfo(ino)->ino_state = USTATE;
|
|
n_files--;
|
|
}
|