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 8.4 (Berkeley) 5/9/95 34 */ 35 36 #include <unistd.h> 37 #include <stdlib.h> 38 #include <stdio.h> 39 40 #define MAXDUP 10 /* limit on dup blks (per inode) */ 41 #define MAXBAD 10 /* limit on bad blks (per inode) */ 42 #define MAXBUFSPACE 40*1024 /* maximum space to allocate to buffers */ 43 #define INOBUFSIZE 56*1024 /* size of buffer to read inodes in pass1 */ 44 45 /* 46 * Each inode on the filesystem is described by the following structure. 47 * The linkcnt is initially set to the value in the inode. Each time it 48 * is found during the descent in passes 2, 3, and 4 the count is 49 * decremented. Any inodes whose count is non-zero after pass 4 needs to 50 * have its link count adjusted by the value remaining in ino_linkcnt. 51 */ 52 struct inostat { 53 char ino_state; /* state of inode, see below */ 54 char ino_type; /* type of inode */ 55 short ino_linkcnt; /* number of links not found */ 56 }; 57 /* 58 * Inode states. 59 */ 60 #define USTATE 01 /* inode not allocated */ 61 #define FSTATE 02 /* inode is file */ 62 #define DSTATE 03 /* inode is directory */ 63 #define DFOUND 04 /* directory found during descent */ 64 #define DCLEAR 05 /* directory is to be cleared */ 65 #define FCLEAR 06 /* file is to be cleared */ 66 /* 67 * Inode state information is contained on per cylinder group lists 68 * which are described by the following structure. 69 */ 70 struct inostatlist { 71 long il_numalloced; /* number of inodes allocated in this cg */ 72 struct inostat *il_stat;/* inostat info for this cylinder group */ 73 } *inostathead; 74 75 /* 76 * buffer cache structure. 77 */ 78 struct bufarea { 79 struct bufarea *b_next; /* free list queue */ 80 struct bufarea *b_prev; /* free list queue */ 81 ufs_daddr_t b_bno; 82 int b_size; 83 int b_errs; 84 int b_flags; 85 union { 86 char *b_buf; /* buffer space */ 87 ufs_daddr_t *b_indir; /* indirect block */ 88 struct fs *b_fs; /* super block */ 89 struct cg *b_cg; /* cylinder group */ 90 struct dinode *b_dinode; /* inode block */ 91 } b_un; 92 char b_dirty; 93 }; 94 95 #define B_INUSE 1 96 97 #define MINBUFS 5 /* minimum number of buffers required */ 98 struct bufarea bufhead; /* head of list of other blks in filesys */ 99 struct bufarea sblk; /* file system superblock */ 100 struct bufarea cgblk; /* cylinder group blocks */ 101 struct bufarea *pdirbp; /* current directory contents */ 102 struct bufarea *pbp; /* current inode block */ 103 104 #define dirty(bp) (bp)->b_dirty = 1 105 #define initbarea(bp) \ 106 (bp)->b_dirty = 0; \ 107 (bp)->b_bno = (ufs_daddr_t)-1; \ 108 (bp)->b_flags = 0; 109 110 #define sbdirty() sblk.b_dirty = 1 111 #define cgdirty() cgblk.b_dirty = 1 112 #define sblock (*sblk.b_un.b_fs) 113 #define cgrp (*cgblk.b_un.b_cg) 114 115 enum fixstate {DONTKNOW, NOFIX, FIX, IGNORE}; 116 117 struct inodesc { 118 enum fixstate id_fix; /* policy on fixing errors */ 119 int (*id_func)(); /* function to be applied to blocks of inode */ 120 ino_t id_number; /* inode number described */ 121 ino_t id_parent; /* for DATA nodes, their parent */ 122 ufs_daddr_t id_blkno; /* current block number being examined */ 123 int id_numfrags; /* number of frags contained in block */ 124 quad_t id_filesize; /* for DATA nodes, the size of the directory */ 125 int id_loc; /* for DATA nodes, current location in dir */ 126 int id_entryno; /* for DATA nodes, current entry number */ 127 struct direct *id_dirp; /* for DATA nodes, ptr to current entry */ 128 char *id_name; /* for DATA nodes, name to find or enter */ 129 char id_type; /* type of descriptor, DATA or ADDR */ 130 }; 131 /* file types */ 132 #define DATA 1 133 #define ADDR 2 134 135 /* 136 * Linked list of duplicate blocks. 137 * 138 * The list is composed of two parts. The first part of the 139 * list (from duplist through the node pointed to by muldup) 140 * contains a single copy of each duplicate block that has been 141 * found. The second part of the list (from muldup to the end) 142 * contains duplicate blocks that have been found more than once. 143 * To check if a block has been found as a duplicate it is only 144 * necessary to search from duplist through muldup. To find the 145 * total number of times that a block has been found as a duplicate 146 * the entire list must be searched for occurences of the block 147 * in question. The following diagram shows a sample list where 148 * w (found twice), x (found once), y (found three times), and z 149 * (found once) are duplicate block numbers: 150 * 151 * w -> y -> x -> z -> y -> w -> y 152 * ^ ^ 153 * | | 154 * duplist muldup 155 */ 156 struct dups { 157 struct dups *next; 158 ufs_daddr_t dup; 159 }; 160 struct dups *duplist; /* head of dup list */ 161 struct dups *muldup; /* end of unique duplicate dup block numbers */ 162 163 /* 164 * Linked list of inodes with zero link counts. 165 */ 166 struct zlncnt { 167 struct zlncnt *next; 168 ino_t zlncnt; 169 }; 170 struct zlncnt *zlnhead; /* head of zero link count list */ 171 172 /* 173 * Inode cache data structures. 174 */ 175 struct inoinfo { 176 struct inoinfo *i_nexthash; /* next entry in hash chain */ 177 ino_t i_number; /* inode number of this entry */ 178 ino_t i_parent; /* inode number of parent */ 179 ino_t i_dotdot; /* inode number of `..' */ 180 size_t i_isize; /* size of inode */ 181 u_int i_numblks; /* size of block array in bytes */ 182 ufs_daddr_t i_blks[1]; /* actually longer */ 183 } **inphead, **inpsort; 184 long numdirs, listmax, inplast; 185 long countdirs; /* number of directories we actually found */ 186 187 char *cdevname; /* name of device being checked */ 188 long dev_bsize; /* computed value of DEV_BSIZE */ 189 long secsize; /* actual disk sector size */ 190 char fflag; /* force check, ignore clean flag */ 191 char nflag; /* assume a no response */ 192 char yflag; /* assume a yes response */ 193 int bflag; /* location of alternate super block */ 194 int debug; /* output debugging info */ 195 int cvtlevel; /* convert to newer file system format */ 196 int doinglevel1; /* converting to new cylinder group format */ 197 int doinglevel2; /* converting to new inode format */ 198 int newinofmt; /* filesystem has new inode format */ 199 char usedsoftdep; /* just fix soft dependency inconsistencies */ 200 char preen; /* just fix normal inconsistencies */ 201 char rerun; /* rerun fsck. Only used in non-preen mode */ 202 int returntosingle; /* 1 => return to single user mode on exit */ 203 char resolved; /* cleared if unresolved changes => not clean */ 204 char hotroot; /* checking root device */ 205 char havesb; /* superblock has been read */ 206 int fsmodified; /* 1 => write done to file system */ 207 int fsreadfd; /* file descriptor for reading file system */ 208 int fswritefd; /* file descriptor for writing file system */ 209 210 ufs_daddr_t maxfsblock; /* number of blocks in the file system */ 211 char *blockmap; /* ptr to primary blk allocation map */ 212 ino_t maxino; /* number of inodes in file system */ 213 214 ino_t lfdir; /* lost & found directory inode number */ 215 char *lfname; /* lost & found directory name */ 216 int lfmode; /* lost & found directory creation mode */ 217 218 ufs_daddr_t n_blks; /* number of blocks in use */ 219 ufs_daddr_t n_files; /* number of files in use */ 220 221 #define clearinode(dp) (*(dp) = zino) 222 struct dinode zino; 223 224 #define setbmap(blkno) setbit(blockmap, blkno) 225 #define testbmap(blkno) isset(blockmap, blkno) 226 #define clrbmap(blkno) clrbit(blockmap, blkno) 227 228 #define STOP 0x01 229 #define SKIP 0x02 230 #define KEEPON 0x04 231 #define ALTERED 0x08 232 #define FOUND 0x10 233 234 #define EEXIT 8 /* Standard error exit. */ 235 236 struct fstab; 237 238 239 void adjust __P((struct inodesc *, int lcnt)); 240 ufs_daddr_t allocblk __P((long frags)); 241 ino_t allocdir __P((ino_t parent, ino_t request, int mode)); 242 ino_t allocino __P((ino_t request, int type)); 243 void blkerror __P((ino_t ino, char *type, ufs_daddr_t blk)); 244 char *blockcheck __P((char *name)); 245 int bread __P((int fd, char *buf, ufs_daddr_t blk, long size)); 246 void bufinit __P((void)); 247 void bwrite __P((int fd, char *buf, ufs_daddr_t blk, long size)); 248 void cacheino __P((struct dinode *dp, ino_t inumber)); 249 void catch __P((int)); 250 void catchquit __P((int)); 251 int changeino __P((ino_t dir, char *name, ino_t newnum)); 252 int checkfstab __P((int preen, int maxrun, 253 int (*docheck)(struct fstab *), 254 int (*chkit)(char *, char *, long, int))); 255 int chkrange __P((ufs_daddr_t blk, int cnt)); 256 void ckfini __P((int markclean)); 257 int ckinode __P((struct dinode *dp, struct inodesc *)); 258 void clri __P((struct inodesc *, char *type, int flag)); 259 int clearentry __P((struct inodesc *)); 260 void direrror __P((ino_t ino, char *errmesg)); 261 int dirscan __P((struct inodesc *)); 262 int dofix __P((struct inodesc *, char *msg)); 263 void ffs_clrblock __P((struct fs *, u_char *, ufs_daddr_t)); 264 void ffs_fragacct __P((struct fs *, int, int32_t [], int)); 265 int ffs_isblock __P((struct fs *, u_char *, ufs_daddr_t)); 266 void ffs_setblock __P((struct fs *, u_char *, ufs_daddr_t)); 267 void fileerror __P((ino_t cwd, ino_t ino, char *errmesg)); 268 int findino __P((struct inodesc *)); 269 int findname __P((struct inodesc *)); 270 void flush __P((int fd, struct bufarea *bp)); 271 void freeblk __P((ufs_daddr_t blkno, long frags)); 272 void freeino __P((ino_t ino)); 273 void freeinodebuf __P((void)); 274 int ftypeok __P((struct dinode *dp)); 275 void getblk __P((struct bufarea *bp, ufs_daddr_t blk, long size)); 276 struct bufarea *getdatablk __P((ufs_daddr_t blkno, long size)); 277 struct inoinfo *getinoinfo __P((ino_t inumber)); 278 struct dinode *getnextinode __P((ino_t inumber)); 279 void getpathname __P((char *namebuf, ino_t curdir, ino_t ino)); 280 struct dinode *ginode __P((ino_t inumber)); 281 void inocleanup __P((void)); 282 void inodirty __P((void)); 283 struct inostat *inoinfo __P((ino_t inum)); 284 int linkup __P((ino_t orphan, ino_t parentdir, char *name)); 285 int makeentry __P((ino_t parent, ino_t ino, char *name)); 286 void panic __P((const char *fmt, ...)); 287 void pass1 __P((void)); 288 void pass1b __P((void)); 289 int pass1check __P((struct inodesc *)); 290 void pass2 __P((void)); 291 void pass3 __P((void)); 292 void pass4 __P((void)); 293 int pass4check __P((struct inodesc *)); 294 void pass5 __P((void)); 295 void pfatal __P((const char *fmt, ...)); 296 void pinode __P((ino_t ino)); 297 void propagate __P((void)); 298 void pwarn __P((const char *fmt, ...)); 299 int reply __P((char *question)); 300 void setinodebuf __P((ino_t)); 301 int setup __P((char *dev)); 302 void voidquit __P((int)); 303