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 * $FreeBSD$ 35 */ 36 37 #include <unistd.h> 38 #include <stdlib.h> 39 #include <stdio.h> 40 41 #define MAXDUP 10 /* limit on dup blks (per inode) */ 42 #define MAXBAD 10 /* limit on bad blks (per inode) */ 43 #define MAXBUFSPACE 40*1024 /* maximum space to allocate to buffers */ 44 #define INOBUFSIZE 56*1024 /* size of buffer to read inodes in pass1 */ 45 46 /* 47 * Each inode on the filesystem is described by the following structure. 48 * The linkcnt is initially set to the value in the inode. Each time it 49 * is found during the descent in passes 2, 3, and 4 the count is 50 * decremented. Any inodes whose count is non-zero after pass 4 needs to 51 * have its link count adjusted by the value remaining in ino_linkcnt. 52 */ 53 struct inostat { 54 char ino_state; /* state of inode, see below */ 55 char ino_type; /* type of inode */ 56 short ino_linkcnt; /* number of links not found */ 57 }; 58 /* 59 * Inode states. 60 */ 61 #define USTATE 01 /* inode not allocated */ 62 #define FSTATE 02 /* inode is file */ 63 #define DSTATE 03 /* inode is directory */ 64 #define DFOUND 04 /* directory found during descent */ 65 #define DCLEAR 05 /* directory is to be cleared */ 66 #define FCLEAR 06 /* file is to be cleared */ 67 /* 68 * Inode state information is contained on per cylinder group lists 69 * which are described by the following structure. 70 */ 71 struct inostatlist { 72 long il_numalloced; /* number of inodes allocated in this cg */ 73 struct inostat *il_stat;/* inostat info for this cylinder group */ 74 } *inostathead; 75 76 /* 77 * buffer cache structure. 78 */ 79 struct bufarea { 80 struct bufarea *b_next; /* free list queue */ 81 struct bufarea *b_prev; /* free list queue */ 82 ufs_daddr_t b_bno; 83 int b_size; 84 int b_errs; 85 int b_flags; 86 union { 87 char *b_buf; /* buffer space */ 88 ufs_daddr_t *b_indir; /* indirect block */ 89 struct fs *b_fs; /* super block */ 90 struct cg *b_cg; /* cylinder group */ 91 struct dinode *b_dinode; /* inode block */ 92 } b_un; 93 char b_dirty; 94 }; 95 96 #define B_INUSE 1 97 98 #define MINBUFS 5 /* minimum number of buffers required */ 99 struct bufarea bufhead; /* head of list of other blks in filesys */ 100 struct bufarea sblk; /* file system superblock */ 101 struct bufarea cgblk; /* cylinder group blocks */ 102 struct bufarea *pdirbp; /* current directory contents */ 103 struct bufarea *pbp; /* current inode block */ 104 105 #define dirty(bp) \ 106 if (fswritefd < 0) \ 107 pfatal("SETTING DIRTY FLAG IN READ_ONLY MODE\n"); \ 108 else \ 109 (bp)->b_dirty = 1 110 #define initbarea(bp) \ 111 (bp)->b_dirty = 0; \ 112 (bp)->b_bno = (ufs_daddr_t)-1; \ 113 (bp)->b_flags = 0; 114 115 #define sbdirty() dirty(&sblk) 116 #define cgdirty() dirty(&cgblk) 117 #define sblock (*sblk.b_un.b_fs) 118 #define cgrp (*cgblk.b_un.b_cg) 119 120 enum fixstate {DONTKNOW, NOFIX, FIX, IGNORE}; 121 ino_t cursnapshot; 122 123 struct inodesc { 124 enum fixstate id_fix; /* policy on fixing errors */ 125 int (*id_func)(); /* function to be applied to blocks of inode */ 126 ino_t id_number; /* inode number described */ 127 ino_t id_parent; /* for DATA nodes, their parent */ 128 int id_lbn; /* logical block number of current block */ 129 ufs_daddr_t id_blkno; /* current block number being examined */ 130 int id_numfrags; /* number of frags contained in block */ 131 quad_t id_filesize; /* for DATA nodes, the size of the directory */ 132 int id_loc; /* for DATA nodes, current location in dir */ 133 int id_entryno; /* for DATA nodes, current entry number */ 134 struct direct *id_dirp; /* for DATA nodes, ptr to current entry */ 135 char *id_name; /* for DATA nodes, name to find or enter */ 136 char id_type; /* type of descriptor, DATA or ADDR */ 137 }; 138 /* file types */ 139 #define DATA 1 /* a directory */ 140 #define SNAP 2 /* a snapshot */ 141 #define ADDR 3 /* anything but a directory or a snapshot */ 142 143 /* 144 * Linked list of duplicate blocks. 145 * 146 * The list is composed of two parts. The first part of the 147 * list (from duplist through the node pointed to by muldup) 148 * contains a single copy of each duplicate block that has been 149 * found. The second part of the list (from muldup to the end) 150 * contains duplicate blocks that have been found more than once. 151 * To check if a block has been found as a duplicate it is only 152 * necessary to search from duplist through muldup. To find the 153 * total number of times that a block has been found as a duplicate 154 * the entire list must be searched for occurences of the block 155 * in question. The following diagram shows a sample list where 156 * w (found twice), x (found once), y (found three times), and z 157 * (found once) are duplicate block numbers: 158 * 159 * w -> y -> x -> z -> y -> w -> y 160 * ^ ^ 161 * | | 162 * duplist muldup 163 */ 164 struct dups { 165 struct dups *next; 166 ufs_daddr_t dup; 167 }; 168 struct dups *duplist; /* head of dup list */ 169 struct dups *muldup; /* end of unique duplicate dup block numbers */ 170 171 /* 172 * Linked list of inodes with zero link counts. 173 */ 174 struct zlncnt { 175 struct zlncnt *next; 176 ino_t zlncnt; 177 }; 178 struct zlncnt *zlnhead; /* head of zero link count list */ 179 180 /* 181 * Inode cache data structures. 182 */ 183 struct inoinfo { 184 struct inoinfo *i_nexthash; /* next entry in hash chain */ 185 ino_t i_number; /* inode number of this entry */ 186 ino_t i_parent; /* inode number of parent */ 187 ino_t i_dotdot; /* inode number of `..' */ 188 size_t i_isize; /* size of inode */ 189 u_int i_numblks; /* size of block array in bytes */ 190 ufs_daddr_t i_blks[1]; /* actually longer */ 191 } **inphead, **inpsort; 192 long numdirs, dirhash, listmax, inplast; 193 long countdirs; /* number of directories we actually found */ 194 195 #define MIBSIZE 3 /* size of fsck sysctl MIBs */ 196 int adjrefcnt[MIBSIZE]; /* MIB command to adjust inode reference cnt */ 197 int adjblkcnt[MIBSIZE]; /* MIB command to adjust inode block count */ 198 int freefiles[MIBSIZE]; /* MIB command to free a set of files */ 199 int freedirs[MIBSIZE]; /* MIB command to free a set of directories */ 200 int freeblks[MIBSIZE]; /* MIB command to free a set of data blocks */ 201 struct fsck_cmd cmd; /* sysctl filesystem update commands */ 202 char snapname[BUFSIZ]; /* when doing snapshots, the name of the file */ 203 char *cdevname; /* name of device being checked */ 204 long dev_bsize; /* computed value of DEV_BSIZE */ 205 long secsize; /* actual disk sector size */ 206 char nflag; /* assume a no response */ 207 char yflag; /* assume a yes response */ 208 int bkgrdflag; /* use a snapshot to run on an active system */ 209 int bflag; /* location of alternate super block */ 210 int debug; /* output debugging info */ 211 int cvtlevel; /* convert to newer file system format */ 212 int doinglevel1; /* converting to new cylinder group format */ 213 int doinglevel2; /* converting to new inode format */ 214 int newinofmt; /* filesystem has new inode format */ 215 int bkgrdcheck; /* determine if background check is possible */ 216 char usedsoftdep; /* just fix soft dependency inconsistencies */ 217 char preen; /* just fix normal inconsistencies */ 218 char rerun; /* rerun fsck. Only used in non-preen mode */ 219 int returntosingle; /* 1 => return to single user mode on exit */ 220 char resolved; /* cleared if unresolved changes => not clean */ 221 char havesb; /* superblock has been read */ 222 char skipclean; /* skip clean file systems if preening */ 223 int fsmodified; /* 1 => write done to file system */ 224 int fsreadfd; /* file descriptor for reading file system */ 225 int fswritefd; /* file descriptor for writing file system */ 226 227 ufs_daddr_t maxfsblock; /* number of blocks in the file system */ 228 char *blockmap; /* ptr to primary blk allocation map */ 229 ino_t maxino; /* number of inodes in file system */ 230 231 ino_t lfdir; /* lost & found directory inode number */ 232 char *lfname; /* lost & found directory name */ 233 int lfmode; /* lost & found directory creation mode */ 234 235 ufs_daddr_t n_blks; /* number of blocks in use */ 236 ufs_daddr_t n_files; /* number of files in use */ 237 238 int got_siginfo; /* received a SIGINFO */ 239 240 #define clearinode(dp) (*(dp) = zino) 241 struct dinode zino; 242 243 #define setbmap(blkno) setbit(blockmap, blkno) 244 #define testbmap(blkno) isset(blockmap, blkno) 245 #define clrbmap(blkno) clrbit(blockmap, blkno) 246 247 #define STOP 0x01 248 #define SKIP 0x02 249 #define KEEPON 0x04 250 #define ALTERED 0x08 251 #define FOUND 0x10 252 253 #define EEXIT 8 /* Standard error exit. */ 254 255 struct fstab; 256 257 258 void adjust __P((struct inodesc *, int lcnt)); 259 ufs_daddr_t allocblk __P((long frags)); 260 ino_t allocdir __P((ino_t parent, ino_t request, int mode)); 261 ino_t allocino __P((ino_t request, int type)); 262 void blkerror __P((ino_t ino, char *type, ufs_daddr_t blk)); 263 char *blockcheck __P((char *name)); 264 int bread __P((int fd, char *buf, ufs_daddr_t blk, long size)); 265 void bufinit __P((void)); 266 void bwrite __P((int fd, char *buf, ufs_daddr_t blk, long size)); 267 void cacheino __P((struct dinode *dp, ino_t inumber)); 268 void catch __P((int)); 269 void catchquit __P((int)); 270 int changeino __P((ino_t dir, char *name, ino_t newnum)); 271 int chkrange __P((ufs_daddr_t blk, int cnt)); 272 void ckfini __P((int markclean)); 273 int ckinode __P((struct dinode *dp, struct inodesc *)); 274 void clri __P((struct inodesc *, char *type, int flag)); 275 int clearentry __P((struct inodesc *)); 276 void direrror __P((ino_t ino, char *errmesg)); 277 int dirscan __P((struct inodesc *)); 278 int dofix __P((struct inodesc *, char *msg)); 279 void ffs_clrblock __P((struct fs *, u_char *, ufs_daddr_t)); 280 void ffs_fragacct __P((struct fs *, int, int32_t [], int)); 281 int ffs_isblock __P((struct fs *, u_char *, ufs_daddr_t)); 282 void ffs_setblock __P((struct fs *, u_char *, ufs_daddr_t)); 283 void fileerror __P((ino_t cwd, ino_t ino, char *errmesg)); 284 int findino __P((struct inodesc *)); 285 int findname __P((struct inodesc *)); 286 void flush __P((int fd, struct bufarea *bp)); 287 void freeblk __P((ufs_daddr_t blkno, long frags)); 288 void freeino __P((ino_t ino)); 289 void freeinodebuf __P((void)); 290 int ftypeok __P((struct dinode *dp)); 291 void getblk __P((struct bufarea *bp, ufs_daddr_t blk, long size)); 292 struct bufarea *getdatablk __P((ufs_daddr_t blkno, long size)); 293 struct inoinfo *getinoinfo __P((ino_t inumber)); 294 struct dinode *getnextinode __P((ino_t inumber)); 295 void getpathname __P((char *namebuf, ino_t curdir, ino_t ino)); 296 struct dinode *ginode __P((ino_t inumber)); 297 void infohandler __P((int sig)); 298 void inocleanup __P((void)); 299 void inodirty __P((void)); 300 struct inostat *inoinfo __P((ino_t inum)); 301 int linkup __P((ino_t orphan, ino_t parentdir, char *name)); 302 int makeentry __P((ino_t parent, ino_t ino, char *name)); 303 void panic __P((const char *fmt, ...)); 304 void pass1 __P((void)); 305 void pass1b __P((void)); 306 int pass1check __P((struct inodesc *)); 307 void pass2 __P((void)); 308 void pass3 __P((void)); 309 void pass4 __P((void)); 310 int pass4check __P((struct inodesc *)); 311 void pass5 __P((void)); 312 void pfatal __P((const char *fmt, ...)); 313 void pinode __P((ino_t ino)); 314 void propagate __P((void)); 315 void pwarn __P((const char *fmt, ...)); 316 int readsb __P((int listerr)); 317 int reply __P((char *question)); 318 void rwerror __P((char *mesg, ufs_daddr_t blk)); 319 void sblock_init __P((void)); 320 void setinodebuf __P((ino_t)); 321 int setup __P((char *dev)); 322 void voidquit __P((int)); 323