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/* $OpenBSD: setup.c,v 1.31 2017/08/26 06:32:06 otto Exp $ */ |
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/* $NetBSD: setup.c,v 1.1 1997/06/11 11:22:01 bouyer Exp $ */ |
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/* |
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* Copyright (c) 1997 Manuel Bouyer. |
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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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#define DKTYPENAMES |
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#include <sys/param.h> /* DEV_BSIZE roundup */ |
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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/dkio.h> |
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#include <sys/disklabel.h> |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <string.h> |
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#include <ctype.h> |
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#include <err.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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#define POWEROF2(num) (((num) & ((num) - 1)) == 0) |
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void badsb(int, char *); |
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int calcsb(char *, int, struct m_ext2fs *, struct disklabel *); |
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static struct disklabel *getdisklabel(char *, int); |
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static int readsb(int); |
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int |
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setup(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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off_t sizepb; |
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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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76 |
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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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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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} |
88 |
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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"); |
102 |
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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); |
108 |
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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\n"); |
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if ((lp = getdisklabel(NULL, fsreadfd)) != NULL) |
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secsize = lp->d_secsize; |
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else |
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secsize = DEV_BSIZE; |
114 |
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115 |
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if (!hotroot()) { |
116 |
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#ifndef SMALL |
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if (pledge("stdio getpw flock rpath cpath wpath", NULL) == -1) |
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err(1, "pledge"); |
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#else |
120 |
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if (pledge("stdio flock rpath cpath wpath", NULL) == -1) |
121 |
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err(1, "pledge"); |
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#endif |
123 |
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} |
124 |
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125 |
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/* |
126 |
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* Read in the superblock, looking for alternates if necessary |
127 |
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*/ |
128 |
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if (readsb(1) == 0) { |
129 |
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if (bflag || preen || calcsb(dev, fsreadfd, &proto, lp) == 0) |
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return(0); |
131 |
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if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) |
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return (0); |
133 |
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for (cg = 1; cg < proto.e2fs_ncg; cg++) { |
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bflag = fsbtodb(&proto, |
135 |
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cg * proto.e2fs.e2fs_bpg + proto.e2fs.e2fs_first_dblock); |
136 |
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if (readsb(0) != 0) |
137 |
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break; |
138 |
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} |
139 |
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if (cg >= proto.e2fs_ncg) { |
140 |
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printf("%s %s\n%s %s\n%s %s\n", |
141 |
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"SEARCH FOR ALTERNATE SUPER-BLOCK", |
142 |
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"FAILED. YOU MUST USE THE", |
143 |
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"-b OPTION TO FSCK_FFS TO SPECIFY THE", |
144 |
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"LOCATION OF AN ALTERNATE", |
145 |
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"SUPER-BLOCK TO SUPPLY NEEDED", |
146 |
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"INFORMATION; SEE fsck_ext2fs(8)."); |
147 |
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return(0); |
148 |
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} |
149 |
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doskipclean = 0; |
150 |
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pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); |
151 |
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} |
152 |
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if (debug) |
153 |
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printf("state = %d\n", sblock.e2fs.e2fs_state); |
154 |
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if (sblock.e2fs.e2fs_state == E2FS_ISCLEAN) { |
155 |
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if (doskipclean) { |
156 |
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pwarn("%sile system is clean; not checking\n", |
157 |
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preen ? "f" : "** F"); |
158 |
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return (-1); |
159 |
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} |
160 |
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if (!preen) |
161 |
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pwarn("** File system is already clean\n"); |
162 |
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} |
163 |
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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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} |
171 |
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/* |
172 |
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* Check and potentially fix certain fields in the super block. |
173 |
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*/ |
174 |
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if (/* (sblock.e2fs.e2fs_rbcount < 0) || */ |
175 |
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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) { |
179 |
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sblock.e2fs.e2fs_rbcount = sblock.e2fs.e2fs_bcount * 0.1; |
180 |
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sbdirty(); |
181 |
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dirty(&asblk); |
182 |
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} |
183 |
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} |
184 |
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if (sblock.e2fs.e2fs_bpg != sblock.e2fs.e2fs_fpg) { |
185 |
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pfatal("WRONG FPG=%d (BPG=%d) IN SUPERBLOCK", |
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sblock.e2fs.e2fs_fpg, sblock.e2fs.e2fs_bpg); |
187 |
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return 0; |
188 |
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} |
189 |
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if (asblk.b_dirty && !bflag) { |
190 |
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copyback_sb(&asblk); |
191 |
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flush(fswritefd, &asblk); |
192 |
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} |
193 |
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/* |
194 |
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* read in the summary info. |
195 |
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*/ |
196 |
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197 |
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sblock.e2fs_gd = calloc(sblock.e2fs_ngdb, sblock.e2fs_bsize); |
198 |
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if (sblock.e2fs_gd == NULL) |
199 |
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errexit("out of memory\n"); |
200 |
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asked = 0; |
201 |
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for (i=0; i < sblock.e2fs_ngdb; i++) { |
202 |
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if (bread(fsreadfd,(char *) |
203 |
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&sblock.e2fs_gd[i* sblock.e2fs_bsize / sizeof(struct ext2_gd)], |
204 |
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fsbtodb(&sblock, ((sblock.e2fs_bsize>1024)?0:1)+i+1), |
205 |
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sblock.e2fs_bsize) != 0 && !asked) { |
206 |
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pfatal("BAD SUMMARY INFORMATION"); |
207 |
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if (reply("CONTINUE") == 0) |
208 |
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errexit("%s\n", ""); |
209 |
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asked++; |
210 |
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} |
211 |
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} |
212 |
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/* |
213 |
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* allocate and initialize the necessary maps |
214 |
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*/ |
215 |
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bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); |
216 |
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blockmap = calloc((unsigned)bmapsize, sizeof (char)); |
217 |
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if (blockmap == NULL) { |
218 |
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printf("cannot alloc %u bytes for blockmap\n", |
219 |
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(unsigned)bmapsize); |
220 |
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goto badsblabel; |
221 |
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} |
222 |
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statemap = calloc((unsigned)(maxino + 2), sizeof(char)); |
223 |
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if (statemap == NULL) { |
224 |
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printf("cannot alloc %u bytes for statemap\n", |
225 |
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(unsigned)(maxino + 1)); |
226 |
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goto badsblabel; |
227 |
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} |
228 |
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typemap = calloc((unsigned)(maxino + 1), sizeof(u_char)); |
229 |
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if (typemap == NULL) { |
230 |
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printf("cannot alloc %u bytes for typemap\n", |
231 |
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(unsigned)(maxino + 1)); |
232 |
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goto badsblabel; |
233 |
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} |
234 |
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lncntp = calloc((unsigned)(maxino + 1), sizeof(int16_t)); |
235 |
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if (lncntp == NULL) { |
236 |
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printf("cannot alloc %u bytes for lncntp\n", |
237 |
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(unsigned)((maxino + 1) * sizeof(int16_t))); |
238 |
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goto badsblabel; |
239 |
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} |
240 |
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for (numdirs = 0, cg = 0; cg < sblock.e2fs_ncg; cg++) { |
241 |
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numdirs += letoh16(sblock.e2fs_gd[cg].ext2bgd_ndirs); |
242 |
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} |
243 |
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inplast = 0; |
244 |
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listmax = numdirs + 10; |
245 |
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inpsort = calloc((unsigned)listmax, sizeof(struct inoinfo *)); |
246 |
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inphead = calloc((unsigned)numdirs, sizeof(struct inoinfo *)); |
247 |
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if (inpsort == NULL || inphead == NULL) { |
248 |
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printf("cannot alloc %u bytes for inphead\n", |
249 |
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(unsigned)(numdirs * sizeof(struct inoinfo *))); |
250 |
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goto badsblabel; |
251 |
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} |
252 |
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bufinit(); |
253 |
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return (1); |
254 |
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255 |
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badsblabel: |
256 |
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ckfini(0); |
257 |
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return (0); |
258 |
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} |
259 |
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260 |
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/* |
261 |
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* Read in the super block and its summary info. |
262 |
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*/ |
263 |
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static int |
264 |
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readsb(int listerr) |
265 |
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{ |
266 |
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daddr32_t super = bflag ? bflag : SBOFF / DEV_BSIZE; |
267 |
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|
268 |
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if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, (long)SBSIZE) != 0) |
269 |
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return (0); |
270 |
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sblk.b_bno = super; |
271 |
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sblk.b_size = SBSIZE; |
272 |
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|
273 |
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/* Copy the superblock in memory */ |
274 |
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e2fs_sbload(sblk.b_un.b_fs, &sblock.e2fs); |
275 |
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|
276 |
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/* |
277 |
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* run a few consistency checks of the super block |
278 |
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*/ |
279 |
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if (sblock.e2fs.e2fs_magic != E2FS_MAGIC) { |
280 |
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badsb(listerr, "MAGIC NUMBER WRONG"); return (0); |
281 |
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} |
282 |
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if (sblock.e2fs.e2fs_log_bsize > 2) { |
283 |
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badsb(listerr, "BAD LOG_BSIZE"); return (0); |
284 |
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} |
285 |
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if (sblock.e2fs.e2fs_bpg == 0) { |
286 |
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badsb(listerr, "BAD BLOCKS PER GROUP"); return (0); |
287 |
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} |
288 |
|
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|
289 |
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/* compute the dynamic fields of the in-memory sb */ |
290 |
|
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/* compute dynamic sb infos */ |
291 |
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sblock.e2fs_ncg = |
292 |
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howmany(sblock.e2fs.e2fs_bcount - sblock.e2fs.e2fs_first_dblock, |
293 |
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sblock.e2fs.e2fs_bpg); |
294 |
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/* XXX assume hw bsize = 512 */ |
295 |
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sblock.e2fs_fsbtodb = sblock.e2fs.e2fs_log_bsize + 1; |
296 |
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sblock.e2fs_bsize = 1024 << sblock.e2fs.e2fs_log_bsize; |
297 |
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sblock.e2fs_bshift = LOG_MINBSIZE + sblock.e2fs.e2fs_log_bsize; |
298 |
|
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sblock.e2fs_qbmask = sblock.e2fs_bsize - 1; |
299 |
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sblock.e2fs_bmask = ~sblock.e2fs_qbmask; |
300 |
|
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sblock.e2fs_ngdb = howmany(sblock.e2fs_ncg, |
301 |
|
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sblock.e2fs_bsize / sizeof(struct ext2_gd)); |
302 |
|
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sblock.e2fs_ipb = sblock.e2fs_bsize / EXT2_DINODE_SIZE(&sblock); |
303 |
|
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sblock.e2fs_itpg = sblock.e2fs.e2fs_ipg/sblock.e2fs_ipb; |
304 |
|
|
|
305 |
|
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/* |
306 |
|
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* Compute block size that the filesystem is based on, |
307 |
|
|
* according to fsbtodb, and adjust superblock block number |
308 |
|
|
* so we can tell if this is an alternate later. |
309 |
|
|
*/ |
310 |
|
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sblk.b_bno = super / DEV_BSIZE; |
311 |
|
|
|
312 |
|
|
if (sblock.e2fs_ncg == 1) { |
313 |
|
|
/* no alternate superblock; assume it's okey */ |
314 |
|
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havesb = 1; |
315 |
|
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return 1; |
316 |
|
|
} |
317 |
|
|
|
318 |
|
|
getblk(&asblk, 1 * sblock.e2fs.e2fs_bpg + sblock.e2fs.e2fs_first_dblock, |
319 |
|
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(long)SBSIZE); |
320 |
|
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if (asblk.b_errs) |
321 |
|
|
return (0); |
322 |
|
|
if (bflag) { |
323 |
|
|
havesb = 1; |
324 |
|
|
return (1); |
325 |
|
|
} |
326 |
|
|
|
327 |
|
|
/* |
328 |
|
|
* Set all possible fields that could differ, then do check |
329 |
|
|
* of whole super block against an alternate super block. |
330 |
|
|
* When an alternate super-block is specified this check is skipped. |
331 |
|
|
*/ |
332 |
|
|
asblk.b_un.b_fs->e2fs_rbcount = sblk.b_un.b_fs->e2fs_rbcount; |
333 |
|
|
asblk.b_un.b_fs->e2fs_fbcount = sblk.b_un.b_fs->e2fs_fbcount; |
334 |
|
|
asblk.b_un.b_fs->e2fs_ficount = sblk.b_un.b_fs->e2fs_ficount; |
335 |
|
|
asblk.b_un.b_fs->e2fs_mtime = sblk.b_un.b_fs->e2fs_mtime; |
336 |
|
|
asblk.b_un.b_fs->e2fs_wtime = sblk.b_un.b_fs->e2fs_wtime; |
337 |
|
|
asblk.b_un.b_fs->e2fs_mnt_count = sblk.b_un.b_fs->e2fs_mnt_count; |
338 |
|
|
asblk.b_un.b_fs->e2fs_max_mnt_count = sblk.b_un.b_fs->e2fs_max_mnt_count; |
339 |
|
|
asblk.b_un.b_fs->e2fs_state = sblk.b_un.b_fs->e2fs_state; |
340 |
|
|
asblk.b_un.b_fs->e2fs_beh = sblk.b_un.b_fs->e2fs_beh; |
341 |
|
|
asblk.b_un.b_fs->e2fs_lastfsck = sblk.b_un.b_fs->e2fs_lastfsck; |
342 |
|
|
asblk.b_un.b_fs->e2fs_fsckintv = sblk.b_un.b_fs->e2fs_fsckintv; |
343 |
|
|
asblk.b_un.b_fs->e2fs_ruid = sblk.b_un.b_fs->e2fs_ruid; |
344 |
|
|
asblk.b_un.b_fs->e2fs_rgid = sblk.b_un.b_fs->e2fs_rgid; |
345 |
|
|
asblk.b_un.b_fs->e2fs_block_group_nr = |
346 |
|
|
sblk.b_un.b_fs->e2fs_block_group_nr; |
347 |
|
|
asblk.b_un.b_fs->e2fs_features_rocompat &= ~EXT2F_ROCOMPAT_LARGEFILE; |
348 |
|
|
asblk.b_un.b_fs->e2fs_features_rocompat |= |
349 |
|
|
sblk.b_un.b_fs->e2fs_features_rocompat & EXT2F_ROCOMPAT_LARGEFILE; |
350 |
|
|
if (sblock.e2fs.e2fs_rev > E2FS_REV0 && |
351 |
|
|
((sblock.e2fs.e2fs_features_incompat & ~EXT2F_INCOMPAT_SUPP) || |
352 |
|
|
(sblock.e2fs.e2fs_features_rocompat & ~EXT2F_ROCOMPAT_SUPP))) { |
353 |
|
|
if (debug) { |
354 |
|
|
printf("compat 0x%08x, incompat 0x%08x, compat_ro " |
355 |
|
|
"0x%08x\n", |
356 |
|
|
sblock.e2fs.e2fs_features_compat, |
357 |
|
|
sblock.e2fs.e2fs_features_incompat, |
358 |
|
|
sblock.e2fs.e2fs_features_rocompat); |
359 |
|
|
} |
360 |
|
|
badsb(listerr,"INCOMPATIBLE FEATURE BITS IN SUPER BLOCK"); |
361 |
|
|
return 0; |
362 |
|
|
} |
363 |
|
|
if (memcmp(sblk.b_un.b_fs, asblk.b_un.b_fs, SBSIZE)) { |
364 |
|
|
if (debug) { |
365 |
|
|
u_int32_t *nlp, *olp, *endlp; |
366 |
|
|
|
367 |
|
|
printf("superblock mismatches\n"); |
368 |
|
|
nlp = (u_int32_t *)asblk.b_un.b_fs; |
369 |
|
|
olp = (u_int32_t *)sblk.b_un.b_fs; |
370 |
|
|
endlp = olp + (SBSIZE / sizeof *olp); |
371 |
|
|
for ( ; olp < endlp; olp++, nlp++) { |
372 |
|
|
if (*olp == *nlp) |
373 |
|
|
continue; |
374 |
|
|
printf("offset %ld, original %ld, alternate %ld\n", |
375 |
|
|
(long)(olp - (u_int32_t *)sblk.b_un.b_fs), |
376 |
|
|
(long)letoh32(*olp), |
377 |
|
|
(long)letoh32(*nlp)); |
378 |
|
|
} |
379 |
|
|
} |
380 |
|
|
badsb(listerr, |
381 |
|
|
"VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); |
382 |
|
|
return (0); |
383 |
|
|
} |
384 |
|
|
havesb = 1; |
385 |
|
|
return (1); |
386 |
|
|
} |
387 |
|
|
|
388 |
|
|
void |
389 |
|
|
copyback_sb(struct bufarea *bp) |
390 |
|
|
{ |
391 |
|
|
/* Copy the in-memory superblock back to buffer */ |
392 |
|
|
bp->b_un.b_fs->e2fs_icount = letoh32(sblock.e2fs.e2fs_icount); |
393 |
|
|
bp->b_un.b_fs->e2fs_bcount = letoh32(sblock.e2fs.e2fs_bcount); |
394 |
|
|
bp->b_un.b_fs->e2fs_rbcount = letoh32(sblock.e2fs.e2fs_rbcount); |
395 |
|
|
bp->b_un.b_fs->e2fs_fbcount = letoh32(sblock.e2fs.e2fs_fbcount); |
396 |
|
|
bp->b_un.b_fs->e2fs_ficount = letoh32(sblock.e2fs.e2fs_ficount); |
397 |
|
|
bp->b_un.b_fs->e2fs_first_dblock = |
398 |
|
|
letoh32(sblock.e2fs.e2fs_first_dblock); |
399 |
|
|
bp->b_un.b_fs->e2fs_log_bsize = letoh32(sblock.e2fs.e2fs_log_bsize); |
400 |
|
|
bp->b_un.b_fs->e2fs_log_fsize = letoh32(sblock.e2fs.e2fs_log_fsize); |
401 |
|
|
bp->b_un.b_fs->e2fs_bpg = letoh32(sblock.e2fs.e2fs_bpg); |
402 |
|
|
bp->b_un.b_fs->e2fs_fpg = letoh32(sblock.e2fs.e2fs_fpg); |
403 |
|
|
bp->b_un.b_fs->e2fs_ipg = letoh32(sblock.e2fs.e2fs_ipg); |
404 |
|
|
bp->b_un.b_fs->e2fs_mtime = letoh32(sblock.e2fs.e2fs_mtime); |
405 |
|
|
bp->b_un.b_fs->e2fs_wtime = letoh32(sblock.e2fs.e2fs_wtime); |
406 |
|
|
bp->b_un.b_fs->e2fs_lastfsck = letoh32(sblock.e2fs.e2fs_lastfsck); |
407 |
|
|
bp->b_un.b_fs->e2fs_fsckintv = letoh32(sblock.e2fs.e2fs_fsckintv); |
408 |
|
|
bp->b_un.b_fs->e2fs_creator = letoh32(sblock.e2fs.e2fs_creator); |
409 |
|
|
bp->b_un.b_fs->e2fs_rev = letoh32(sblock.e2fs.e2fs_rev); |
410 |
|
|
bp->b_un.b_fs->e2fs_mnt_count = letoh16(sblock.e2fs.e2fs_mnt_count); |
411 |
|
|
bp->b_un.b_fs->e2fs_max_mnt_count = |
412 |
|
|
letoh16(sblock.e2fs.e2fs_max_mnt_count); |
413 |
|
|
bp->b_un.b_fs->e2fs_magic = letoh16(sblock.e2fs.e2fs_magic); |
414 |
|
|
bp->b_un.b_fs->e2fs_state = letoh16(sblock.e2fs.e2fs_state); |
415 |
|
|
bp->b_un.b_fs->e2fs_beh = letoh16(sblock.e2fs.e2fs_beh); |
416 |
|
|
bp->b_un.b_fs->e2fs_ruid = letoh16(sblock.e2fs.e2fs_ruid); |
417 |
|
|
bp->b_un.b_fs->e2fs_rgid = letoh16(sblock.e2fs.e2fs_rgid); |
418 |
|
|
} |
419 |
|
|
|
420 |
|
|
void |
421 |
|
|
badsb(int listerr, char *s) |
422 |
|
|
{ |
423 |
|
|
|
424 |
|
|
if (!listerr) |
425 |
|
|
return; |
426 |
|
|
if (preen) |
427 |
|
|
printf("%s: ", cdevname()); |
428 |
|
|
pfatal("BAD SUPER BLOCK: %s\n", s); |
429 |
|
|
} |
430 |
|
|
|
431 |
|
|
/* |
432 |
|
|
* Calculate a prototype superblock based on information in the disk label. |
433 |
|
|
* When done the cgsblock macro can be calculated and the fs_ncg field |
434 |
|
|
* can be used. Do NOT attempt to use other macros without verifying that |
435 |
|
|
* their needed information is available! |
436 |
|
|
*/ |
437 |
|
|
int |
438 |
|
|
calcsb(char *dev, int devfd, struct m_ext2fs *fs, struct disklabel *lp) |
439 |
|
|
{ |
440 |
|
|
struct partition *pp; |
441 |
|
|
char *cp; |
442 |
|
|
|
443 |
|
|
cp = strchr(dev, '\0'); |
444 |
|
|
if ((cp == NULL || (cp[-1] < 'a' || cp[-1] >= 'a' + MAXPARTITIONS)) && |
445 |
|
|
!isdigit((unsigned char)cp[-1])) { |
446 |
|
|
pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); |
447 |
|
|
return (0); |
448 |
|
|
} |
449 |
|
|
cp--; |
450 |
|
|
if (lp == NULL) |
451 |
|
|
pfatal("%s: CANNOT READ DISKLABEL\n", dev); |
452 |
|
|
if (isdigit((unsigned char)*cp)) |
453 |
|
|
pp = &lp->d_partitions[0]; |
454 |
|
|
else |
455 |
|
|
pp = &lp->d_partitions[*cp - 'a']; |
456 |
|
|
if (pp->p_fstype != FS_EXT2FS) { |
457 |
|
|
pfatal("%s: NOT LABELED AS A EXT2 FILE SYSTEM (%s)\n", |
458 |
|
|
dev, pp->p_fstype < FSMAXTYPES ? |
459 |
|
|
fstypenames[pp->p_fstype] : "unknown"); |
460 |
|
|
return (0); |
461 |
|
|
} |
462 |
|
|
memset(fs, 0, sizeof(struct m_ext2fs)); |
463 |
|
|
fs->e2fs_bsize = DISKLABELV1_FFS_FSIZE(pp->p_fragblock); /* XXX */ |
464 |
|
|
if (fs->e2fs_bsize == 0) { |
465 |
|
|
pfatal("%s: BLOCK SIZE DETERMINED TO BE ZERO\n", dev); |
466 |
|
|
return (0); |
467 |
|
|
} |
468 |
|
|
fs->e2fs.e2fs_log_bsize = fs->e2fs_bsize / 1024; |
469 |
|
|
fs->e2fs.e2fs_bcount = (pp->p_size * DEV_BSIZE) / fs->e2fs_bsize; |
470 |
|
|
fs->e2fs.e2fs_first_dblock = (fs->e2fs.e2fs_log_bsize == 0) ? 1 : 0; |
471 |
|
|
fs->e2fs.e2fs_bpg = fs->e2fs_bsize * NBBY; |
472 |
|
|
fs->e2fs_bshift = LOG_MINBSIZE + fs->e2fs.e2fs_log_bsize; |
473 |
|
|
fs->e2fs_qbmask = fs->e2fs_bsize - 1; |
474 |
|
|
fs->e2fs_bmask = ~fs->e2fs_qbmask; |
475 |
|
|
fs->e2fs_ncg = |
476 |
|
|
howmany(fs->e2fs.e2fs_bcount - fs->e2fs.e2fs_first_dblock, |
477 |
|
|
fs->e2fs.e2fs_bpg); |
478 |
|
|
fs->e2fs_fsbtodb = fs->e2fs.e2fs_log_bsize + 1; |
479 |
|
|
fs->e2fs_ngdb = howmany(fs->e2fs_ncg, |
480 |
|
|
fs->e2fs_bsize / sizeof(struct ext2_gd)); |
481 |
|
|
|
482 |
|
|
return (1); |
483 |
|
|
} |
484 |
|
|
|
485 |
|
|
static struct disklabel * |
486 |
|
|
getdisklabel(char *s, int fd) |
487 |
|
|
{ |
488 |
|
|
static struct disklabel lab; |
489 |
|
|
|
490 |
|
|
if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { |
491 |
|
|
if (s == NULL) |
492 |
|
|
return (NULL); |
493 |
|
|
pwarn("ioctl (GCINFO): %s\n", strerror(errno)); |
494 |
|
|
errexit("%s: can't read disk label\n", s); |
495 |
|
|
} |
496 |
|
|
return (&lab); |
497 |
|
|
} |
498 |
|
|
|
499 |
|
|
daddr32_t |
500 |
|
|
cgoverhead(int c) |
501 |
|
|
{ |
502 |
|
|
int overh; |
503 |
|
|
overh = 1 /* block bitmap */ + |
504 |
|
|
1 /* inode bitmap */ + |
505 |
|
|
sblock.e2fs_itpg; |
506 |
|
|
if (sblock.e2fs.e2fs_rev > E2FS_REV0 && |
507 |
|
|
sblock.e2fs.e2fs_features_rocompat & EXT2F_ROCOMPAT_SPARSESUPER) { |
508 |
|
|
if (cg_has_sb(c) == 0) |
509 |
|
|
return overh; |
510 |
|
|
} |
511 |
|
|
overh += 1 + sblock.e2fs_ngdb; |
512 |
|
|
return overh; |
513 |
|
|
} |