1 /* 2 * Copyright (c) 2003 Juli Mallett. All rights reserved. 3 * 4 * This software was written by Juli Mallett <jmallett@FreeBSD.org> for the 5 * FreeBSD project. Redistribution and use in source and binary forms, with 6 * or without modification, are permitted provided that the following 7 * conditions are met: 8 * 9 * 1. Redistribution of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 2. Redistribution in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/mount.h> 33 #include <sys/disklabel.h> 34 #include <sys/stat.h> 35 36 #include <ufs/ufs/ufsmount.h> 37 #include <ufs/ufs/dinode.h> 38 #include <ufs/ffs/fs.h> 39 40 #include <errno.h> 41 #include <fcntl.h> 42 #include <stdio.h> 43 #include <string.h> 44 #include <unistd.h> 45 46 #include <libufs.h> 47 48 int 49 cgread(struct uufsd *disk) 50 { 51 return (cgread1(disk, disk->d_ccg++)); 52 } 53 54 int 55 cgread1(struct uufsd *disk, int c) 56 { 57 struct fs *fs; 58 off_t ccg; 59 60 fs = &disk->d_fs; 61 62 if (c >= fs->fs_ncg) { 63 return (0); 64 } 65 ccg = fsbtodb(fs, cgtod(fs, c)) * disk->d_bsize; 66 if (bread(disk, fsbtodb(fs, cgtod(fs, c)), disk->d_cgunion.d_buf, 67 fs->fs_bsize) == -1) { 68 ERROR(disk, "unable to read cylinder group"); 69 return (-1); 70 } 71 disk->d_lcg = c; 72 return (1); 73 } 74 75 int 76 cgwrite1(struct uufsd *disk, int c) 77 { 78 struct fs *fs; 79 80 fs = &disk->d_fs; 81 if (bwrite(disk, fsbtodb(fs, cgtod(fs, c)), 82 disk->d_cgunion.d_buf, fs->fs_bsize) == -1) { 83 ERROR(disk, "unable to write cylinder group"); 84 return (-1); 85 } 86 return (0); 87 } 88