560 lines
17 KiB
C
560 lines
17 KiB
C
/* $NetBSD: setup.c,v 1.28 2011/09/16 16:13:18 plunky 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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/*
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* Copyright (c) 1997 Manuel Bouyer.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)setup.c 8.5 (Berkeley) 11/23/94";
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#else
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__RCSID("$NetBSD: setup.c,v 1.28 2011/09/16 16:13:18 plunky Exp $");
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#endif
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#endif /* not lint */
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#define FSTYPENAMES
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#include <sys/param.h>
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#include <sys/time.h>
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#include <ufs/ext2fs/ext2fs_dinode.h>
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#include <ufs/ext2fs/ext2fs.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/disklabel.h>
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#include <sys/file.h>
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#include <errno.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 <ctype.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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#include "exitvalues.h"
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void badsb(int, const char *);
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int calcsb(const char *, int, struct m_ext2fs *);
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static struct disklabel *getdisklabel(const char *, int);
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static int readsb(int);
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int
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setup(const char *dev)
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{
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long cg, asked, i;
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long bmapsize;
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struct disklabel *lp;
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#ifndef __minix
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off_t sizepb;
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#else
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u64_t sizepb;
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#endif
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struct stat statb;
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struct m_ext2fs proto;
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int doskipclean;
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u_int64_t maxfilesize;
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havesb = 0;
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fswritefd = -1;
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doskipclean = skipclean;
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if (stat(dev, &statb) < 0) {
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printf("Can't stat %s: %s\n", dev, strerror(errno));
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return 0;
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}
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#ifndef __minix
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if (!S_ISCHR(statb.st_mode)) {
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pfatal("%s is not a character device", dev);
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if (reply("CONTINUE") == 0)
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return 0;
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}
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#endif
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if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
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printf("Can't open %s: %s\n", dev, strerror(errno));
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return 0;
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}
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if (preen == 0)
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printf("** %s", dev);
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if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) {
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fswritefd = -1;
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if (preen)
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pfatal("NO WRITE ACCESS");
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printf(" (NO WRITE)");
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}
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if (preen == 0)
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printf("\n");
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fsmodified = 0;
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lfdir = 0;
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initbarea(&sblk);
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initbarea(&asblk);
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sblk.b_un.b_buf = malloc(SBSIZE);
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asblk.b_un.b_buf = malloc(SBSIZE);
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if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
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errexit("cannot allocate space for superblock");
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if ((lp = getdisklabel(NULL, fsreadfd)) != NULL)
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dev_bsize = secsize = lp->d_secsize;
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else
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dev_bsize = secsize = DEV_BSIZE;
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/*
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* Read in the superblock, looking for alternates if necessary
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*/
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if (readsb(1) == 0) {
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if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0)
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return 0;
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if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0)
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return 0;
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for (cg = 1; cg < proto.e2fs_ncg; cg++) {
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bflag = fsbtodb(&proto,
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cg * proto.e2fs.e2fs_bpg +
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proto.e2fs.e2fs_first_dblock);
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if (readsb(0) != 0)
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break;
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}
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if (cg >= proto.e2fs_ncg) {
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printf("%s %s\n%s %s\n%s %s\n",
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"SEARCH FOR ALTERNATE SUPER-BLOCK",
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"FAILED. YOU MUST USE THE",
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"-b OPTION TO FSCK_FFS TO SPECIFY THE",
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"LOCATION OF AN ALTERNATE",
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"SUPER-BLOCK TO SUPPLY NEEDED",
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"INFORMATION; SEE fsck_ext2fs(8).");
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return 0;
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}
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doskipclean = 0;
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pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag);
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}
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if (debug)
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printf("state = %d\n", sblock.e2fs.e2fs_state);
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if (sblock.e2fs.e2fs_state == E2FS_ISCLEAN) {
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if (doskipclean) {
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pwarn("%sile system is clean; not checking\n",
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preen ? "f" : "** F");
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return -1;
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}
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if (!preen)
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pwarn("** File system is already clean\n");
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}
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maxfsblock = sblock.e2fs.e2fs_bcount;
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maxino = sblock.e2fs_ncg * sblock.e2fs.e2fs_ipg;
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sizepb = sblock.e2fs_bsize;
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maxfilesize = sblock.e2fs_bsize * NDADDR - 1;
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for (i = 0; i < NIADDR; i++) {
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sizepb *= NINDIR(&sblock);
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maxfilesize += sizepb;
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}
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/*
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* Check and potentially fix certain fields in the super block.
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*/
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if (/* (sblock.e2fs.e2fs_rbcount < 0) || */
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(sblock.e2fs.e2fs_rbcount > sblock.e2fs.e2fs_bcount)) {
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pfatal("IMPOSSIBLE RESERVED BLOCK COUNT=%d IN SUPERBLOCK",
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sblock.e2fs.e2fs_rbcount);
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if (reply("SET TO DEFAULT") == 1) {
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sblock.e2fs.e2fs_rbcount =
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sblock.e2fs.e2fs_bcount * MINFREE / 100;
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sbdirty();
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dirty(&asblk);
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}
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}
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if (sblock.e2fs.e2fs_bpg != sblock.e2fs.e2fs_fpg) {
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pfatal("WRONG FPG=%d (BPG=%d) IN SUPERBLOCK",
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sblock.e2fs.e2fs_fpg, sblock.e2fs.e2fs_bpg);
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return 0;
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}
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if (asblk.b_dirty && !bflag) {
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copyback_sb(&asblk);
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flush(fswritefd, &asblk);
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}
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/*
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* read in the summary info.
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*/
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sblock.e2fs_gd = malloc(sblock.e2fs_ngdb * sblock.e2fs_bsize);
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if (sblock.e2fs_gd == NULL)
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errexit("out of memory");
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asked = 0;
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for (i = 0; i < sblock.e2fs_ngdb; i++) {
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if (bread(fsreadfd,
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(char *)&sblock.e2fs_gd[i * sblock.e2fs_bsize /
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sizeof(struct ext2_gd)],
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fsbtodb(&sblock, ((sblock.e2fs_bsize > 1024) ? 0 : 1) +
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i + 1),
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sblock.e2fs_bsize) != 0 && !asked) {
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pfatal("BAD SUMMARY INFORMATION");
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if (reply("CONTINUE") == 0)
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exit(FSCK_EXIT_CHECK_FAILED);
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asked++;
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}
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}
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/*
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* allocate and initialize the necessary maps
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*/
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bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t));
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blockmap = calloc((unsigned int)bmapsize, sizeof(char));
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if (blockmap == NULL) {
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printf("cannot alloc %u bytes for blockmap\n",
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(unsigned int)bmapsize);
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goto badsblabel;
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}
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statemap = calloc((unsigned int)(maxino + 2), sizeof(char));
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if (statemap == NULL) {
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printf("cannot alloc %u bytes for statemap\n",
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(unsigned int)(maxino + 1));
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goto badsblabel;
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}
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typemap = calloc((unsigned int)(maxino + 1), sizeof(char));
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if (typemap == NULL) {
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printf("cannot alloc %u bytes for typemap\n",
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(unsigned int)(maxino + 1));
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goto badsblabel;
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}
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lncntp = calloc((unsigned)(maxino + 1), sizeof(int16_t));
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if (lncntp == NULL) {
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printf("cannot alloc %u bytes for lncntp\n",
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(unsigned int)((maxino + 1) * sizeof(int16_t)));
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goto badsblabel;
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}
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for (numdirs = 0, cg = 0; cg < sblock.e2fs_ncg; cg++) {
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numdirs += fs2h16(sblock.e2fs_gd[cg].ext2bgd_ndirs);
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}
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inplast = 0;
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listmax = numdirs + 10;
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inpsort = calloc((unsigned int)listmax, sizeof(struct inoinfo *));
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inphead = calloc((unsigned int)numdirs, sizeof(struct inoinfo *));
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if (inpsort == NULL || inphead == NULL) {
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printf("cannot alloc %u bytes for inphead\n",
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(unsigned int)(numdirs * sizeof(struct inoinfo *)));
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goto badsblabel;
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}
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bufinit();
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return 1;
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badsblabel:
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ckfini(0);
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return 0;
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}
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/*
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* Read in the super block and its summary info, convert to host byte order.
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*/
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static int
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readsb(int listerr)
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{
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daddr_t super = bflag ? bflag : SBOFF / dev_bsize;
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if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, (long)SBSIZE) != 0)
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return 0;
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sblk.b_bno = super;
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sblk.b_size = SBSIZE;
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/* Copy the superblock in memory */
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e2fs_sbload(sblk.b_un.b_fs, &sblock.e2fs);
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/*
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* run a few consistency checks of the super block
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*/
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if (sblock.e2fs.e2fs_magic != E2FS_MAGIC) {
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badsb(listerr, "MAGIC NUMBER WRONG");
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return 0;
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}
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if (sblock.e2fs.e2fs_log_bsize > 2) {
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badsb(listerr, "BAD LOG_BSIZE");
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return 0;
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}
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if (sblock.e2fs.e2fs_rev > E2FS_REV0 &&
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(!powerof2(sblock.e2fs.e2fs_inode_size) ||
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sblock.e2fs.e2fs_inode_size < sizeof(struct ext2fs_dinode) ||
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sblock.e2fs.e2fs_inode_size >
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(1024 << sblock.e2fs.e2fs_log_bsize))) {
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badsb(listerr, "BAD INODE_SIZE");
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return 0;
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}
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/* compute the dynamic fields of the in-memory sb */
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/* compute dynamic sb infos */
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sblock.e2fs_ncg =
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howmany(sblock.e2fs.e2fs_bcount - sblock.e2fs.e2fs_first_dblock,
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sblock.e2fs.e2fs_bpg);
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/* XXX assume hw bsize = 512 */
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sblock.e2fs_fsbtodb = sblock.e2fs.e2fs_log_bsize + 1;
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sblock.e2fs_bsize = 1024 << sblock.e2fs.e2fs_log_bsize;
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sblock.e2fs_bshift = LOG_MINBSIZE + sblock.e2fs.e2fs_log_bsize;
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sblock.e2fs_qbmask = sblock.e2fs_bsize - 1;
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sblock.e2fs_bmask = ~sblock.e2fs_qbmask;
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sblock.e2fs_ngdb = howmany(sblock.e2fs_ncg,
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sblock.e2fs_bsize / sizeof(struct ext2_gd));
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sblock.e2fs_ipb = sblock.e2fs_bsize / EXT2_DINODE_SIZE(&sblock);
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sblock.e2fs_itpg = howmany(sblock.e2fs.e2fs_ipg, sblock.e2fs_ipb);
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/*
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* Compute block size that the filesystem is based on,
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* according to fsbtodb, and adjust superblock block number
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* so we can tell if this is an alternate later.
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*/
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super *= dev_bsize;
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dev_bsize = sblock.e2fs_bsize / fsbtodb(&sblock, 1);
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sblk.b_bno = super / dev_bsize;
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if (sblock.e2fs_ncg == 1) {
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/* no alternate superblock; assume it's okay */
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havesb = 1;
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return 1;
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}
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getblk(&asblk, 1 * sblock.e2fs.e2fs_bpg + sblock.e2fs.e2fs_first_dblock,
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(long)SBSIZE);
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if (asblk.b_errs)
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return 0;
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if (bflag) {
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havesb = 1;
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return 1;
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}
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/*
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* Set all possible fields that could differ, then do check
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* of whole super block against an alternate super block.
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* When an alternate super-block is specified this check is skipped.
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*/
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asblk.b_un.b_fs->e2fs_rbcount = sblk.b_un.b_fs->e2fs_rbcount;
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asblk.b_un.b_fs->e2fs_fbcount = sblk.b_un.b_fs->e2fs_fbcount;
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asblk.b_un.b_fs->e2fs_ficount = sblk.b_un.b_fs->e2fs_ficount;
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asblk.b_un.b_fs->e2fs_mtime = sblk.b_un.b_fs->e2fs_mtime;
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asblk.b_un.b_fs->e2fs_wtime = sblk.b_un.b_fs->e2fs_wtime;
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asblk.b_un.b_fs->e2fs_mnt_count = sblk.b_un.b_fs->e2fs_mnt_count;
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asblk.b_un.b_fs->e2fs_max_mnt_count =
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sblk.b_un.b_fs->e2fs_max_mnt_count;
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asblk.b_un.b_fs->e2fs_state = sblk.b_un.b_fs->e2fs_state;
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asblk.b_un.b_fs->e2fs_beh = sblk.b_un.b_fs->e2fs_beh;
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asblk.b_un.b_fs->e2fs_lastfsck = sblk.b_un.b_fs->e2fs_lastfsck;
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asblk.b_un.b_fs->e2fs_fsckintv = sblk.b_un.b_fs->e2fs_fsckintv;
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asblk.b_un.b_fs->e2fs_ruid = sblk.b_un.b_fs->e2fs_ruid;
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asblk.b_un.b_fs->e2fs_rgid = sblk.b_un.b_fs->e2fs_rgid;
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asblk.b_un.b_fs->e2fs_block_group_nr =
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sblk.b_un.b_fs->e2fs_block_group_nr;
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asblk.b_un.b_fs->e2fs_features_rocompat &= ~EXT2F_ROCOMPAT_LARGEFILE;
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asblk.b_un.b_fs->e2fs_features_rocompat |=
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sblk.b_un.b_fs->e2fs_features_rocompat & EXT2F_ROCOMPAT_LARGEFILE;
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if (sblock.e2fs.e2fs_rev > E2FS_REV0 &&
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((sblock.e2fs.e2fs_features_incompat & ~EXT2F_INCOMPAT_SUPP) ||
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(sblock.e2fs.e2fs_features_rocompat & ~EXT2F_ROCOMPAT_SUPP))) {
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if (debug) {
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printf("compat 0x%08x, incompat 0x%08x, compat_ro "
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"0x%08x\n",
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sblock.e2fs.e2fs_features_compat,
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sblock.e2fs.e2fs_features_incompat,
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sblock.e2fs.e2fs_features_rocompat);
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}
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badsb(listerr, "INCOMPATIBLE FEATURE BITS IN SUPER BLOCK");
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return 0;
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}
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if (memcmp(sblk.b_un.b_fs, asblk.b_un.b_fs, SBSIZE)) {
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if (debug) {
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u_int32_t *nlp, *olp, *endlp;
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printf("superblock mismatches\n");
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nlp = (u_int32_t *)asblk.b_un.b_fs;
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olp = (u_int32_t *)sblk.b_un.b_fs;
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endlp = olp + (SBSIZE / sizeof(*olp));
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for ( ; olp < endlp; olp++, nlp++) {
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if (*olp == *nlp)
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continue;
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printf("offset %ld, original %ld, "
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"alternate %ld\n",
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(long)(olp - (u_int32_t *)sblk.b_un.b_fs),
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(long)fs2h32(*olp),
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(long)fs2h32(*nlp));
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}
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}
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badsb(listerr,
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"VALUES IN SUPER BLOCK DISAGREE WITH "
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"THOSE IN FIRST ALTERNATE");
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return 0;
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}
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havesb = 1;
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return 1;
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}
|
|
|
|
void
|
|
copyback_sb(struct bufarea *bp)
|
|
{
|
|
/* Copy the in-memory superblock back to buffer */
|
|
bp->b_un.b_fs->e2fs_icount = h2fs32(sblock.e2fs.e2fs_icount);
|
|
bp->b_un.b_fs->e2fs_bcount = h2fs32(sblock.e2fs.e2fs_bcount);
|
|
bp->b_un.b_fs->e2fs_rbcount = h2fs32(sblock.e2fs.e2fs_rbcount);
|
|
bp->b_un.b_fs->e2fs_fbcount = h2fs32(sblock.e2fs.e2fs_fbcount);
|
|
bp->b_un.b_fs->e2fs_ficount = h2fs32(sblock.e2fs.e2fs_ficount);
|
|
bp->b_un.b_fs->e2fs_first_dblock =
|
|
h2fs32(sblock.e2fs.e2fs_first_dblock);
|
|
bp->b_un.b_fs->e2fs_log_bsize = h2fs32(sblock.e2fs.e2fs_log_bsize);
|
|
bp->b_un.b_fs->e2fs_fsize = h2fs32(sblock.e2fs.e2fs_fsize);
|
|
bp->b_un.b_fs->e2fs_bpg = h2fs32(sblock.e2fs.e2fs_bpg);
|
|
bp->b_un.b_fs->e2fs_fpg = h2fs32(sblock.e2fs.e2fs_fpg);
|
|
bp->b_un.b_fs->e2fs_ipg = h2fs32(sblock.e2fs.e2fs_ipg);
|
|
bp->b_un.b_fs->e2fs_mtime = h2fs32(sblock.e2fs.e2fs_mtime);
|
|
bp->b_un.b_fs->e2fs_wtime = h2fs32(sblock.e2fs.e2fs_wtime);
|
|
bp->b_un.b_fs->e2fs_lastfsck = h2fs32(sblock.e2fs.e2fs_lastfsck);
|
|
bp->b_un.b_fs->e2fs_fsckintv = h2fs32(sblock.e2fs.e2fs_fsckintv);
|
|
bp->b_un.b_fs->e2fs_creator = h2fs32(sblock.e2fs.e2fs_creator);
|
|
bp->b_un.b_fs->e2fs_rev = h2fs32(sblock.e2fs.e2fs_rev);
|
|
bp->b_un.b_fs->e2fs_mnt_count = h2fs16(sblock.e2fs.e2fs_mnt_count);
|
|
bp->b_un.b_fs->e2fs_max_mnt_count =
|
|
h2fs16(sblock.e2fs.e2fs_max_mnt_count);
|
|
bp->b_un.b_fs->e2fs_magic = h2fs16(sblock.e2fs.e2fs_magic);
|
|
bp->b_un.b_fs->e2fs_state = h2fs16(sblock.e2fs.e2fs_state);
|
|
bp->b_un.b_fs->e2fs_beh = h2fs16(sblock.e2fs.e2fs_beh);
|
|
bp->b_un.b_fs->e2fs_ruid = h2fs16(sblock.e2fs.e2fs_ruid);
|
|
bp->b_un.b_fs->e2fs_rgid = h2fs16(sblock.e2fs.e2fs_rgid);
|
|
}
|
|
|
|
void
|
|
badsb(int listerr, const char *s)
|
|
{
|
|
|
|
if (!listerr)
|
|
return;
|
|
if (preen)
|
|
printf("%s: ", cdevname());
|
|
pfatal("BAD SUPER BLOCK: %s\n", s);
|
|
}
|
|
|
|
/*
|
|
* Calculate a prototype superblock based on information in the disk label.
|
|
* When done the cgsblock macro can be calculated and the fs_ncg field
|
|
* can be used. Do NOT attempt to use other macros without verifying that
|
|
* their needed information is available!
|
|
*/
|
|
|
|
int
|
|
calcsb(const char *dev, int devfd, struct m_ext2fs *fs)
|
|
{
|
|
#ifdef __minix
|
|
errexit("%s: calcsb: can't read disk label under minix", dev);
|
|
#else
|
|
struct disklabel *lp;
|
|
struct partition *pp;
|
|
char *cp;
|
|
|
|
cp = strchr(dev, '\0');
|
|
if (cp-- == dev ||
|
|
((*cp < 'a' || *cp > 'h') && !isdigit((unsigned char)*cp))) {
|
|
pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev);
|
|
return 0;
|
|
}
|
|
lp = getdisklabel(dev, devfd);
|
|
if (isdigit((unsigned char)*cp))
|
|
pp = &lp->d_partitions[0];
|
|
else
|
|
pp = &lp->d_partitions[*cp - 'a'];
|
|
if (pp->p_fstype != FS_EX2FS) {
|
|
pfatal("%s: NOT LABELED AS A EXT2 FILE SYSTEM (%s)\n",
|
|
dev, pp->p_fstype < FSMAXTYPES ?
|
|
fstypenames[pp->p_fstype] : "unknown");
|
|
return 0;
|
|
}
|
|
memset(fs, 0, sizeof(struct m_ext2fs));
|
|
fs->e2fs_bsize = pp->p_fsize;
|
|
fs->e2fs.e2fs_log_bsize = pp->p_fsize / 1024;
|
|
fs->e2fs.e2fs_bcount = (pp->p_size * DEV_BSIZE) / fs->e2fs_bsize;
|
|
fs->e2fs.e2fs_first_dblock = (fs->e2fs.e2fs_log_bsize == 0) ? 1 : 0;
|
|
fs->e2fs.e2fs_bpg = fs->e2fs_bsize * NBBY;
|
|
fs->e2fs_bshift = LOG_MINBSIZE + fs->e2fs.e2fs_log_bsize;
|
|
fs->e2fs_qbmask = fs->e2fs_bsize - 1;
|
|
fs->e2fs_bmask = ~fs->e2fs_qbmask;
|
|
fs->e2fs_ncg =
|
|
howmany(fs->e2fs.e2fs_bcount - fs->e2fs.e2fs_first_dblock,
|
|
fs->e2fs.e2fs_bpg);
|
|
fs->e2fs_fsbtodb = fs->e2fs.e2fs_log_bsize + 1;
|
|
fs->e2fs_ngdb = howmany(fs->e2fs_ncg,
|
|
fs->e2fs_bsize / sizeof(struct ext2_gd));
|
|
|
|
return 1;
|
|
#endif
|
|
}
|
|
|
|
static struct disklabel *
|
|
getdisklabel(const char *s, int fd)
|
|
{
|
|
static struct disklabel lab;
|
|
|
|
#ifdef __minix
|
|
if (s == NULL)
|
|
return NULL;
|
|
errexit("%s: can't read disk label under minix", s);
|
|
#else
|
|
if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) {
|
|
if (s == NULL)
|
|
return NULL;
|
|
pwarn("ioctl (GCINFO): %s\n", strerror(errno));
|
|
errexit("%s: can't read disk label", s);
|
|
}
|
|
#endif
|
|
return &lab;
|
|
}
|
|
|
|
daddr_t
|
|
cgoverhead(int c)
|
|
{
|
|
int overh;
|
|
overh =
|
|
1 /* block bitmap */ +
|
|
1 /* inode bitmap */ +
|
|
sblock.e2fs_itpg;
|
|
if (sblock.e2fs.e2fs_rev > E2FS_REV0 &&
|
|
sblock.e2fs.e2fs_features_rocompat & EXT2F_ROCOMPAT_SPARSESUPER) {
|
|
if (cg_has_sb(c) == 0)
|
|
return overh;
|
|
}
|
|
overh += 1 /* superblock */ + sblock.e2fs_ngdb;
|
|
return overh;
|
|
}
|