402 lines
11 KiB
C
402 lines
11 KiB
C
/* $OpenBSD: pass1.c,v 1.49 2024/02/03 18:51:57 beck Exp $ */
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/* $NetBSD: pass1.c,v 1.16 1996/09/27 22:45:15 christos Exp $ */
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/*
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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. 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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#include <sys/param.h> /* MIN setbit btodb isset */
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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 <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 <limits.h>
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#include "fsck.h"
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#include "extern.h"
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#include "fsutil.h"
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static daddr_t badblk;
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static daddr_t dupblk;
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static void checkinode(ino_t, struct inodesc *);
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static ino_t info_inumber;
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static int
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pass1_info(char *buf, size_t buflen)
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{
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return (snprintf(buf, buflen, "phase 1, inode %llu/%llu",
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(unsigned long long)info_inumber,
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(unsigned long long)sblock.fs_ipg * sblock.fs_ncg) > 0);
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}
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void
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pass1(void)
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{
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ino_t inumber, inosused, ninosused;
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size_t inospace;
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struct inostat *info;
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struct bufarea *cgbp;
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struct cg *cgp;
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u_int c;
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struct inodesc idesc;
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daddr_t i, cgd;
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u_int8_t *cp;
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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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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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i = sblock.fs_csaddr;
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cgd = i + howmany(sblock.fs_cssize, sblock.fs_fsize);
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for (; i < cgd; i++)
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setbmap(i);
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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_type = ADDR;
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idesc.id_func = pass1check;
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n_files = n_blks = 0;
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info_inumber = 0;
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info_fn = pass1_info;
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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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cgbp = cglookup(c);
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cgp = cgbp->b_un.b_cg;
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if (sblock.fs_magic == FS_UFS2_MAGIC) {
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inosused = cgp->cg_initediblk;
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if (inosused > sblock.fs_ipg)
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inosused = sblock.fs_ipg;
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} else
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inosused = sblock.fs_ipg;
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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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inospace = (unsigned)inosused * sizeof(struct inostat);
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if (info == NULL)
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errexit("cannot alloc %zu bytes for inoinfo\n", inospace);
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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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info_inumber = 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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if (lastino < (c * sblock.fs_ipg))
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ninosused = 0;
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else
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ninosused = lastino - (c * sblock.fs_ipg);
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inostathead[c].il_numalloced = ninosused;
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if (ninosused == 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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if (ninosused != inosused) {
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struct inostat *ninfo;
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size_t ninospace;
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ninfo = Reallocarray(info, ninosused, sizeof(*ninfo));
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if (ninfo == NULL) {
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pfatal("too many inodes %llu, or out of memory\n",
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(unsigned long long)ninosused);
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exit(8);
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}
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ninospace = ninosused * sizeof(*ninfo);
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if (ninosused > inosused)
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memset(&ninfo[inosused], 0, ninospace - inospace);
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inostathead[c].il_stat = ninfo;
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}
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}
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info_fn = NULL;
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freeinodebuf();
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}
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static void
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checkinode(ino_t inumber, struct inodesc *idesc)
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{
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union dinode *dp;
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off_t kernmaxfilesize;
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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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u_int64_t lndb;
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dp = getnextinode(inumber);
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mode = DIP(dp, di_mode) & IFMT;
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if (mode == 0) {
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if ((sblock.fs_magic == FS_UFS1_MAGIC &&
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(memcmp(dp->dp1.di_db, ufs1_zino.di_db,
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NDADDR * sizeof(int32_t)) ||
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memcmp(dp->dp1.di_ib, ufs1_zino.di_ib,
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NIADDR * sizeof(int32_t)) ||
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dp->dp1.di_mode || dp->dp1.di_size)) ||
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(sblock.fs_magic == FS_UFS2_MAGIC &&
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(memcmp(dp->dp2.di_db, ufs2_zino.di_db,
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NDADDR * sizeof(daddr_t)) ||
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memcmp(dp->dp2.di_ib, ufs2_zino.di_ib,
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NIADDR * sizeof(daddr_t)) ||
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dp->dp2.di_mode || dp->dp2.di_size))) {
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pfatal("PARTIALLY ALLOCATED INODE I=%llu",
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(unsigned long long)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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SET_ISTATE(inumber, USTATE);
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return;
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}
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lastino = inumber;
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/* This should match the file size limit in ffs_mountfs(). */
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kernmaxfilesize = FS_KERNMAXFILESIZE(getpagesize(), &sblock);
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if (DIP(dp, di_size) > kernmaxfilesize ||
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DIP(dp, di_size) > sblock.fs_maxfilesize ||
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(mode == IFDIR && DIP(dp, di_size) > MAXDIRSIZE)) {
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if (debug)
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printf("bad size %llu:",
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(unsigned long long)DIP(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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DIP_SET(dp, di_size, sblock.fs_fsize);
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DIP_SET(dp, di_mode, IFREG|0600);
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inodirty();
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}
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lndb = howmany(DIP(dp, di_size), sblock.fs_bsize);
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ndb = lndb > (u_int64_t)INT_MAX ? -1 : (int)lndb;
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if (ndb < 0) {
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if (debug)
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printf("bad size %llu ndb %d:",
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(unsigned long long)DIP(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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/*
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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 (DIP(dp, di_size) < sblock.fs_maxsymlinklen) {
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if (sblock.fs_magic == FS_UFS1_MAGIC)
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ndb = howmany(DIP(dp, di_size),
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sizeof(int32_t));
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else
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ndb = howmany(DIP(dp, di_size),
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sizeof(int64_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 (DIP(dp, di_db[j]) != 0) {
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if (debug)
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printf("bad direct addr: %lld\n",
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(long long)DIP(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 (DIP(dp, di_ib[j]) != 0) {
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if (debug)
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printf("bad indirect addr: %lld\n",
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(long long)DIP(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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ILNCOUNT(inumber) = DIP(dp, di_nlink);
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if (DIP(dp, di_nlink) <= 0) {
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zlnp = 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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errexit("%s", "");
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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 (DIP(dp, di_size) == 0)
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SET_ISTATE(inumber, DCLEAR);
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else
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SET_ISTATE(inumber, DSTATE);
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cacheino(dp, inumber);
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} else
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SET_ISTATE(inumber, FSTATE);
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SET_ITYPE(inumber, IFTODT(mode));
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badblk = dupblk = 0;
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idesc->id_number = inumber;
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(void)ckinode(dp, idesc);
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idesc->id_entryno *= btodb(sblock.fs_fsize);
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if (DIP(dp, di_blocks) != idesc->id_entryno) {
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pwarn("INCORRECT BLOCK COUNT I=%llu (%lld should be %lld)",
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(unsigned long long)inumber, (long long)DIP(dp, di_blocks),
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(long long)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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DIP_SET(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=%llu", (unsigned long long)inumber);
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SET_ISTATE(inumber, FCLEAR);
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if (reply("CLEAR") == 1) {
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SET_ISTATE(inumber, 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(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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daddr_t blkno = idesc->id_blkno;
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struct dups *dlp;
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struct dups *new;
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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=%llu",
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(unsigned long long)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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errexit("%s", "");
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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=%llu",
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(unsigned long long)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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errexit("%s", "");
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}
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return (STOP);
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}
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new = 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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errexit("%s", "");
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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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