1 /* 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. 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 * @(#)fsck.h 8.1 (Berkeley) 6/5/93 34 */ 35 36 #define MAXDUP 10 /* limit on dup blks (per inode) */ 37 #define MAXBAD 10 /* limit on bad blks (per inode) */ 38 #define MAXBUFSPACE 40*1024 /* maximum space to allocate to buffers */ 39 #define INOBUFSIZE 56*1024 /* size of buffer to read inodes in pass1 */ 40 41 #ifndef BUFSIZ 42 #define BUFSIZ 1024 43 #endif 44 45 #define USTATE 01 /* inode not allocated */ 46 #define FSTATE 02 /* inode is file */ 47 #define DSTATE 03 /* inode is directory */ 48 #define DFOUND 04 /* directory found during descent */ 49 #define DCLEAR 05 /* directory is to be cleared */ 50 #define FCLEAR 06 /* file is to be cleared */ 51 52 /* 53 * buffer cache structure. 54 */ 55 struct bufarea { 56 struct bufarea *b_next; /* free list queue */ 57 struct bufarea *b_prev; /* free list queue */ 58 daddr_t b_bno; 59 int b_size; 60 int b_errs; 61 int b_flags; 62 union { 63 char *b_buf; /* buffer space */ 64 daddr_t *b_indir; /* indirect block */ 65 struct fs *b_fs; /* super block */ 66 struct cg *b_cg; /* cylinder group */ 67 struct dinode *b_dinode; /* inode block */ 68 } b_un; 69 char b_dirty; 70 }; 71 72 #define B_INUSE 1 73 74 #define MINBUFS 5 /* minimum number of buffers required */ 75 struct bufarea bufhead; /* head of list of other blks in filesys */ 76 struct bufarea sblk; /* file system superblock */ 77 struct bufarea cgblk; /* cylinder group blocks */ 78 struct bufarea *pdirbp; /* current directory contents */ 79 struct bufarea *pbp; /* current inode block */ 80 struct bufarea *getdatablk(); 81 82 #define dirty(bp) (bp)->b_dirty = 1 83 #define initbarea(bp) \ 84 (bp)->b_dirty = 0; \ 85 (bp)->b_bno = (daddr_t)-1; \ 86 (bp)->b_flags = 0; 87 88 #define sbdirty() sblk.b_dirty = 1 89 #define cgdirty() cgblk.b_dirty = 1 90 #define sblock (*sblk.b_un.b_fs) 91 #define cgrp (*cgblk.b_un.b_cg) 92 93 enum fixstate {DONTKNOW, NOFIX, FIX, IGNORE}; 94 95 struct inodesc { 96 enum fixstate id_fix; /* policy on fixing errors */ 97 int (*id_func)(); /* function to be applied to blocks of inode */ 98 ino_t id_number; /* inode number described */ 99 ino_t id_parent; /* for DATA nodes, their parent */ 100 daddr_t id_blkno; /* current block number being examined */ 101 int id_numfrags; /* number of frags contained in block */ 102 quad_t id_filesize; /* for DATA nodes, the size of the directory */ 103 int id_loc; /* for DATA nodes, current location in dir */ 104 int id_entryno; /* for DATA nodes, current entry number */ 105 struct direct *id_dirp; /* for DATA nodes, ptr to current entry */ 106 char *id_name; /* for DATA nodes, name to find or enter */ 107 char id_type; /* type of descriptor, DATA or ADDR */ 108 }; 109 /* file types */ 110 #define DATA 1 111 #define ADDR 2 112 113 /* 114 * Linked list of duplicate blocks. 115 * 116 * The list is composed of two parts. The first part of the 117 * list (from duplist through the node pointed to by muldup) 118 * contains a single copy of each duplicate block that has been 119 * found. The second part of the list (from muldup to the end) 120 * contains duplicate blocks that have been found more than once. 121 * To check if a block has been found as a duplicate it is only 122 * necessary to search from duplist through muldup. To find the 123 * total number of times that a block has been found as a duplicate 124 * the entire list must be searched for occurences of the block 125 * in question. The following diagram shows a sample list where 126 * w (found twice), x (found once), y (found three times), and z 127 * (found once) are duplicate block numbers: 128 * 129 * w -> y -> x -> z -> y -> w -> y 130 * ^ ^ 131 * | | 132 * duplist muldup 133 */ 134 struct dups { 135 struct dups *next; 136 daddr_t dup; 137 }; 138 struct dups *duplist; /* head of dup list */ 139 struct dups *muldup; /* end of unique duplicate dup block numbers */ 140 141 /* 142 * Linked list of inodes with zero link counts. 143 */ 144 struct zlncnt { 145 struct zlncnt *next; 146 ino_t zlncnt; 147 }; 148 struct zlncnt *zlnhead; /* head of zero link count list */ 149 150 /* 151 * Inode cache data structures. 152 */ 153 struct inoinfo { 154 struct inoinfo *i_nexthash; /* next entry in hash chain */ 155 ino_t i_number; /* inode number of this entry */ 156 ino_t i_parent; /* inode number of parent */ 157 ino_t i_dotdot; /* inode number of `..' */ 158 size_t i_isize; /* size of inode */ 159 u_int i_numblks; /* size of block array in bytes */ 160 daddr_t i_blks[1]; /* actually longer */ 161 } **inphead, **inpsort; 162 long numdirs, listmax, inplast; 163 164 char *cdevname; /* name of device being checked */ 165 long dev_bsize; /* computed value of DEV_BSIZE */ 166 long secsize; /* actual disk sector size */ 167 char nflag; /* assume a no response */ 168 char yflag; /* assume a yes response */ 169 int bflag; /* location of alternate super block */ 170 int debug; /* output debugging info */ 171 int cvtlevel; /* convert to newer file system format */ 172 int doinglevel1; /* converting to new cylinder group format */ 173 int doinglevel2; /* converting to new inode format */ 174 int newinofmt; /* filesystem has new inode format */ 175 char preen; /* just fix normal inconsistencies */ 176 char hotroot; /* checking root device */ 177 char havesb; /* superblock has been read */ 178 int fsmodified; /* 1 => write done to file system */ 179 int fsreadfd; /* file descriptor for reading file system */ 180 int fswritefd; /* file descriptor for writing file system */ 181 182 daddr_t maxfsblock; /* number of blocks in the file system */ 183 char *blockmap; /* ptr to primary blk allocation map */ 184 ino_t maxino; /* number of inodes in file system */ 185 ino_t lastino; /* last inode in use */ 186 char *statemap; /* ptr to inode state table */ 187 char *typemap; /* ptr to inode type table */ 188 short *lncntp; /* ptr to link count table */ 189 190 ino_t lfdir; /* lost & found directory inode number */ 191 char *lfname; /* lost & found directory name */ 192 int lfmode; /* lost & found directory creation mode */ 193 194 daddr_t n_blks; /* number of blocks in use */ 195 daddr_t n_files; /* number of files in use */ 196 197 #define clearinode(dp) (*(dp) = zino) 198 struct dinode zino; 199 200 #define setbmap(blkno) setbit(blockmap, blkno) 201 #define testbmap(blkno) isset(blockmap, blkno) 202 #define clrbmap(blkno) clrbit(blockmap, blkno) 203 204 #define STOP 0x01 205 #define SKIP 0x02 206 #define KEEPON 0x04 207 #define ALTERED 0x08 208 #define FOUND 0x10 209 210 time_t time(); 211 struct dinode *ginode(); 212 struct inoinfo *getinoinfo(); 213 void getblk(); 214 ino_t allocino(); 215 int findino(); 216