1 /* $OpenBSD: pass4.c,v 1.10 2015/01/16 06:39:57 deraadt Exp $ */ 2 /* $NetBSD: pass4.c,v 1.2 1997/09/14 14:27:29 lukem Exp $ */ 3 4 /* 5 * Copyright (c) 1997 Manuel Bouyer. 6 * Copyright (c) 1980, 1986, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/param.h> /* isset clrbit */ 35 #include <sys/time.h> 36 #include <ufs/ext2fs/ext2fs_dinode.h> 37 #include <ufs/ext2fs/ext2fs.h> 38 #include <stdlib.h> 39 #include <string.h> 40 41 #include "fsutil.h" 42 #include "fsck.h" 43 #include "extern.h" 44 45 void 46 pass4(void) 47 { 48 ino_t inumber; 49 struct zlncnt *zlnp; 50 struct ext2fs_dinode *dp; 51 struct inodesc idesc; 52 int n; 53 54 memset(&idesc, 0, sizeof(struct inodesc)); 55 idesc.id_type = ADDR; 56 idesc.id_func = pass4check; 57 for (inumber = EXT2_ROOTINO; inumber <= lastino; inumber++) { 58 if (inumber < EXT2_FIRSTINO && inumber > EXT2_ROOTINO) 59 continue; 60 idesc.id_number = inumber; 61 switch (statemap[inumber]) { 62 63 case FSTATE: 64 case DFOUND: 65 n = lncntp[inumber]; 66 if (n) 67 adjust(&idesc, (short)n); 68 else { 69 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next) 70 if (zlnp->zlncnt == inumber) { 71 zlnp->zlncnt = zlnhead->zlncnt; 72 zlnp = zlnhead; 73 zlnhead = zlnhead->next; 74 free((char *)zlnp); 75 clri(&idesc, "UNREF", 1); 76 break; 77 } 78 } 79 break; 80 81 case DSTATE: 82 clri(&idesc, "UNREF", 1); 83 break; 84 85 case DCLEAR: 86 dp = ginode(inumber); 87 if (inosize(dp) == 0) { 88 clri(&idesc, "ZERO LENGTH", 1); 89 break; 90 } 91 /* fall through */ 92 case FCLEAR: 93 clri(&idesc, "BAD/DUP", 1); 94 break; 95 96 case USTATE: 97 break; 98 99 default: 100 errexit("BAD STATE %d FOR INODE I=%llu\n", 101 statemap[inumber], (unsigned long long)inumber); 102 } 103 } 104 } 105 106 int 107 pass4check(struct inodesc *idesc) 108 { 109 struct dups *dlp; 110 int nfrags, res = KEEPON; 111 daddr32_t blkno = idesc->id_blkno; 112 113 for (nfrags = idesc->id_numfrags; nfrags > 0; blkno++, nfrags--) { 114 if (chkrange(blkno, 1)) { 115 res = SKIP; 116 } else if (testbmap(blkno)) { 117 for (dlp = duplist; dlp; dlp = dlp->next) { 118 if (dlp->dup != blkno) 119 continue; 120 dlp->dup = duplist->dup; 121 dlp = duplist; 122 duplist = duplist->next; 123 free((char *)dlp); 124 break; 125 } 126 if (dlp == 0) { 127 clrbmap(blkno); 128 n_blks--; 129 } 130 } 131 } 132 return (res); 133 } 134