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7932349eff
all have zero length. A non-zero length panic's the kernel when one of these is deleted. PR: 19426 Submitted by: Ian Dowse <iedowse@maths.tcd.ie> Reviewed by: dwmalone@FreeBSD.org
432 lines
11 KiB
C
432 lines
11 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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#if 0
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static const char sccsid[] = "@(#)pass1.c 8.6 (Berkeley) 4/28/95";
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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/stat.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 <string.h>
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#include "fsck.h"
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static ufs_daddr_t badblk;
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static ufs_daddr_t dupblk;
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static ino_t lastino; /* last inode in use */
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static void checkinode __P((ino_t inumber, struct inodesc *));
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void
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pass1()
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{
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u_int8_t *cp;
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ino_t inumber;
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int c, i, cgd, inosused;
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struct inostat *info;
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struct inodesc idesc;
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/*
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* Set file system reserved blocks in used block map.
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*/
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for (c = 0; c < sblock.fs_ncg; c++) {
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cgd = cgdmin(&sblock, c);
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if (c == 0) {
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i = cgbase(&sblock, c);
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cgd += howmany(sblock.fs_cssize, sblock.fs_fsize);
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} else
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i = cgsblock(&sblock, c);
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for (; i < cgd; i++)
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setbmap(i);
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}
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/*
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* Find all allocated blocks.
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*/
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memset(&idesc, 0, sizeof(struct inodesc));
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idesc.id_func = pass1check;
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n_files = n_blks = 0;
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for (c = 0; c < sblock.fs_ncg; c++) {
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inumber = c * sblock.fs_ipg;
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setinodebuf(inumber);
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inosused = sblock.fs_ipg;
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/*
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* If we are using soft updates, then we can trust the
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* cylinder group inode allocation maps to tell us which
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* inodes are allocated. We will scan the used inode map
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* to find the inodes that are really in use, and then
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* read only those inodes in from disk.
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*/
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if (preen && usedsoftdep) {
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getblk(&cgblk, cgtod(&sblock, c), sblock.fs_cgsize);
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if (!cg_chkmagic(&cgrp))
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pfatal("CG %d: BAD MAGIC NUMBER\n", c);
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cp = &cg_inosused(&cgrp)[(sblock.fs_ipg - 1) / NBBY];
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for ( ; inosused > 0; inosused -= NBBY, cp--) {
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if (*cp == 0)
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continue;
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for (i = 1 << (NBBY - 1); i > 0; i >>= 1) {
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if (*cp & i)
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break;
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inosused--;
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}
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break;
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}
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if (inosused < 0)
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inosused = 0;
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}
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/*
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* Allocate inoinfo structures for the allocated inodes.
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*/
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inostathead[c].il_numalloced = inosused;
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if (inosused == 0) {
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inostathead[c].il_stat = 0;
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continue;
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}
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info = calloc((unsigned)inosused, sizeof(struct inostat));
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if (info == NULL)
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pfatal("cannot alloc %u bytes for inoinfo\n",
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(unsigned)(sizeof(struct inostat) * inosused));
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inostathead[c].il_stat = info;
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/*
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* Scan the allocated inodes.
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*/
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for (i = 0; i < inosused; i++, inumber++) {
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if (inumber < ROOTINO) {
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(void)getnextinode(inumber);
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continue;
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}
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checkinode(inumber, &idesc);
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}
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lastino += 1;
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if (inosused < sblock.fs_ipg || inumber == lastino)
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continue;
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/*
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* If we were not able to determine in advance which inodes
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* were in use, then reduce the size of the inoinfo structure
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* to the size necessary to describe the inodes that we
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* really found.
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*/
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inosused = lastino - (c * sblock.fs_ipg);
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if (inosused < 0)
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inosused = 0;
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inostathead[c].il_numalloced = inosused;
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if (inosused == 0) {
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free(inostathead[c].il_stat);
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inostathead[c].il_stat = 0;
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continue;
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}
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info = calloc((unsigned)inosused, sizeof(struct inostat));
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if (info == NULL)
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pfatal("cannot alloc %u bytes for inoinfo\n",
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(unsigned)(sizeof(struct inostat) * inosused));
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memmove(info, inostathead[c].il_stat, inosused * sizeof(*info));
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free(inostathead[c].il_stat);
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inostathead[c].il_stat = info;
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}
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freeinodebuf();
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}
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static void
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checkinode(inumber, idesc)
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ino_t inumber;
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register struct inodesc *idesc;
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{
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register struct dinode *dp;
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struct zlncnt *zlnp;
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int ndb, j;
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mode_t mode;
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char *symbuf;
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dp = getnextinode(inumber);
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mode = dp->di_mode & IFMT;
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if (mode == 0) {
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if (memcmp(dp->di_db, zino.di_db,
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NDADDR * sizeof(ufs_daddr_t)) ||
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memcmp(dp->di_ib, zino.di_ib,
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NIADDR * sizeof(ufs_daddr_t)) ||
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dp->di_mode || dp->di_size) {
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pfatal("PARTIALLY ALLOCATED INODE I=%lu", inumber);
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if (reply("CLEAR") == 1) {
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dp = ginode(inumber);
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clearinode(dp);
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inodirty();
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}
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}
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inoinfo(inumber)->ino_state = USTATE;
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return;
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}
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lastino = inumber;
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if (/* dp->di_size < 0 || */
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dp->di_size + sblock.fs_bsize - 1 < dp->di_size ||
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(mode == IFDIR && dp->di_size > MAXDIRSIZE)) {
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if (debug)
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printf("bad size %qu:", dp->di_size);
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goto unknown;
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}
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if (!preen && mode == IFMT && reply("HOLD BAD BLOCK") == 1) {
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dp = ginode(inumber);
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dp->di_size = sblock.fs_fsize;
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dp->di_mode = IFREG|0600;
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inodirty();
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}
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if ((mode == IFBLK || mode == IFCHR || mode == IFIFO ||
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mode == IFSOCK) && dp->di_size != 0) {
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if (debug)
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printf("bad special-file size %qu:", dp->di_size);
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goto unknown;
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}
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ndb = howmany(dp->di_size, sblock.fs_bsize);
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if (ndb < 0) {
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if (debug)
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printf("bad size %qu ndb %d:",
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dp->di_size, ndb);
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goto unknown;
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}
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if (mode == IFBLK || mode == IFCHR)
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ndb++;
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if (mode == IFLNK) {
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if (doinglevel2 &&
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dp->di_size > 0 && dp->di_size < MAXSYMLINKLEN &&
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dp->di_blocks != 0) {
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symbuf = alloca(secsize);
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if (bread(fsreadfd, symbuf,
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fsbtodb(&sblock, dp->di_db[0]),
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(long)secsize) != 0)
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errx(EEXIT, "cannot read symlink");
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if (debug) {
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symbuf[dp->di_size] = 0;
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printf("convert symlink %lu(%s) of size %ld\n",
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(u_long)inumber, symbuf, (long)dp->di_size);
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}
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dp = ginode(inumber);
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memmove(dp->di_shortlink, symbuf, (long)dp->di_size);
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dp->di_blocks = 0;
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inodirty();
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}
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/*
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* Fake ndb value so direct/indirect block checks below
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* will detect any garbage after symlink string.
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*/
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if (dp->di_size < sblock.fs_maxsymlinklen) {
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ndb = howmany(dp->di_size, sizeof(ufs_daddr_t));
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if (ndb > NDADDR) {
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j = ndb - NDADDR;
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for (ndb = 1; j > 1; j--)
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ndb *= NINDIR(&sblock);
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ndb += NDADDR;
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}
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}
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}
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for (j = ndb; j < NDADDR; j++)
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if (dp->di_db[j] != 0) {
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if (debug)
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printf("bad direct addr: %ld\n",
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(long)dp->di_db[j]);
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goto unknown;
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}
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for (j = 0, ndb -= NDADDR; ndb > 0; j++)
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ndb /= NINDIR(&sblock);
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for (; j < NIADDR; j++)
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if (dp->di_ib[j] != 0) {
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if (debug)
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printf("bad indirect addr: %ld\n",
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(long)dp->di_ib[j]);
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goto unknown;
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}
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if (ftypeok(dp) == 0)
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goto unknown;
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n_files++;
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inoinfo(inumber)->ino_linkcnt = dp->di_nlink;
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if (dp->di_nlink <= 0) {
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zlnp = (struct zlncnt *)malloc(sizeof *zlnp);
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if (zlnp == NULL) {
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pfatal("LINK COUNT TABLE OVERFLOW");
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if (reply("CONTINUE") == 0) {
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ckfini(0);
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exit(EEXIT);
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}
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} else {
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zlnp->zlncnt = inumber;
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zlnp->next = zlnhead;
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zlnhead = zlnp;
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}
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}
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if (mode == IFDIR) {
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if (dp->di_size == 0)
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inoinfo(inumber)->ino_state = DCLEAR;
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else
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inoinfo(inumber)->ino_state = DSTATE;
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cacheino(dp, inumber);
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countdirs++;
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} else
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inoinfo(inumber)->ino_state = FSTATE;
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inoinfo(inumber)->ino_type = IFTODT(mode);
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if (doinglevel2 &&
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(dp->di_ouid != (u_short)-1 || dp->di_ogid != (u_short)-1)) {
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dp = ginode(inumber);
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dp->di_uid = dp->di_ouid;
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dp->di_ouid = -1;
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dp->di_gid = dp->di_ogid;
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dp->di_ogid = -1;
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inodirty();
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}
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badblk = dupblk = 0;
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idesc->id_number = inumber;
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if (dp->di_flags & SF_SNAPSHOT)
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idesc->id_type = SNAP;
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else
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idesc->id_type = ADDR;
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(void)ckinode(dp, idesc);
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idesc->id_entryno *= btodb(sblock.fs_fsize);
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if (dp->di_blocks != idesc->id_entryno) {
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pwarn("INCORRECT BLOCK COUNT I=%lu (%ld should be %ld)",
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inumber, dp->di_blocks, idesc->id_entryno);
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if (preen)
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printf(" (CORRECTED)\n");
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else if (reply("CORRECT") == 0)
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return;
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dp = ginode(inumber);
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dp->di_blocks = idesc->id_entryno;
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inodirty();
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}
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return;
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unknown:
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pfatal("UNKNOWN FILE TYPE I=%lu", inumber);
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inoinfo(inumber)->ino_state = FCLEAR;
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if (reply("CLEAR") == 1) {
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inoinfo(inumber)->ino_state = USTATE;
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dp = ginode(inumber);
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clearinode(dp);
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inodirty();
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}
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}
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int
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pass1check(idesc)
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register struct inodesc *idesc;
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{
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int res = KEEPON;
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int anyout, nfrags;
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ufs_daddr_t blkno = idesc->id_blkno;
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register struct dups *dlp;
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struct dups *new;
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if (idesc->id_type == SNAP) {
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if (blkno == BLK_NOCOPY)
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return (KEEPON);
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if (idesc->id_number == cursnapshot) {
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if (blkno == blkstofrags(&sblock, idesc->id_lbn))
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return (KEEPON);
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if (blkno == BLK_SNAP) {
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blkno = blkstofrags(&sblock, idesc->id_lbn);
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idesc->id_entryno -= idesc->id_numfrags;
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}
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} else {
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if (blkno == BLK_SNAP)
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return (KEEPON);
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}
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}
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if ((anyout = chkrange(blkno, idesc->id_numfrags)) != 0) {
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blkerror(idesc->id_number, "BAD", blkno);
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if (badblk++ >= MAXBAD) {
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pwarn("EXCESSIVE BAD BLKS I=%lu",
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idesc->id_number);
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if (preen)
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printf(" (SKIPPING)\n");
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else if (reply("CONTINUE") == 0) {
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ckfini(0);
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exit(EEXIT);
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}
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return (STOP);
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}
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}
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for (nfrags = idesc->id_numfrags; nfrags > 0; blkno++, nfrags--) {
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if (anyout && chkrange(blkno, 1)) {
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res = SKIP;
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} else if (!testbmap(blkno)) {
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n_blks++;
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setbmap(blkno);
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} else {
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blkerror(idesc->id_number, "DUP", blkno);
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if (dupblk++ >= MAXDUP) {
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pwarn("EXCESSIVE DUP BLKS I=%lu",
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idesc->id_number);
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if (preen)
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printf(" (SKIPPING)\n");
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else if (reply("CONTINUE") == 0) {
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ckfini(0);
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exit(EEXIT);
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}
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return (STOP);
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}
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new = (struct dups *)malloc(sizeof(struct dups));
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if (new == NULL) {
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pfatal("DUP TABLE OVERFLOW.");
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if (reply("CONTINUE") == 0) {
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ckfini(0);
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exit(EEXIT);
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}
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return (STOP);
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}
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new->dup = blkno;
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if (muldup == 0) {
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duplist = muldup = new;
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new->next = 0;
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} else {
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new->next = muldup->next;
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muldup->next = new;
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}
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for (dlp = duplist; dlp != muldup; dlp = dlp->next)
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if (dlp->dup == blkno)
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break;
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if (dlp == muldup && dlp->dup != blkno)
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muldup = new;
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}
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/*
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* count the number of blocks found in id_entryno
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*/
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idesc->id_entryno++;
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}
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return (res);
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}
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