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; /* filesystem 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) do { \ 106 if (fswritefd < 0) \ 107 pfatal("SETTING DIRTY FLAG IN READ_ONLY MODE\n"); \ 108 else \ 109 (bp)->b_dirty = 1; \ 110 } while (0) 111 #define initbarea(bp) do { \ 112 (bp)->b_dirty = 0; \ 113 (bp)->b_bno = (ufs_daddr_t)-1; \ 114 (bp)->b_flags = 0; \ 115 } while (0) 116 117 #define sbdirty() dirty(&sblk) 118 #define cgdirty() dirty(&cgblk) 119 #define sblock (*sblk.b_un.b_fs) 120 #define cgrp (*cgblk.b_un.b_cg) 121 122 enum fixstate {DONTKNOW, NOFIX, FIX, IGNORE}; 123 ino_t cursnapshot; 124 125 struct inodesc { 126 enum fixstate id_fix; /* policy on fixing errors */ 127 int (*id_func)(); /* function to be applied to blocks of inode */ 128 ino_t id_number; /* inode number described */ 129 ino_t id_parent; /* for DATA nodes, their parent */ 130 int id_lbn; /* logical block number of current block */ 131 ufs_daddr_t id_blkno; /* current block number being examined */ 132 int id_numfrags; /* number of frags contained in block */ 133 quad_t id_filesize; /* for DATA nodes, the size of the directory */ 134 int id_loc; /* for DATA nodes, current location in dir */ 135 int id_entryno; /* for DATA nodes, current entry number */ 136 struct direct *id_dirp; /* for DATA nodes, ptr to current entry */ 137 char *id_name; /* for DATA nodes, name to find or enter */ 138 char id_type; /* type of descriptor, DATA or ADDR */ 139 }; 140 /* file types */ 141 #define DATA 1 /* a directory */ 142 #define SNAP 2 /* a snapshot */ 143 #define ADDR 3 /* anything but a directory or a snapshot */ 144 145 /* 146 * Linked list of duplicate blocks. 147 * 148 * The list is composed of two parts. The first part of the 149 * list (from duplist through the node pointed to by muldup) 150 * contains a single copy of each duplicate block that has been 151 * found. The second part of the list (from muldup to the end) 152 * contains duplicate blocks that have been found more than once. 153 * To check if a block has been found as a duplicate it is only 154 * necessary to search from duplist through muldup. To find the 155 * total number of times that a block has been found as a duplicate 156 * the entire list must be searched for occurences of the block 157 * in question. The following diagram shows a sample list where 158 * w (found twice), x (found once), y (found three times), and z 159 * (found once) are duplicate block numbers: 160 * 161 * w -> y -> x -> z -> y -> w -> y 162 * ^ ^ 163 * | | 164 * duplist muldup 165 */ 166 struct dups { 167 struct dups *next; 168 ufs_daddr_t dup; 169 }; 170 struct dups *duplist; /* head of dup list */ 171 struct dups *muldup; /* end of unique duplicate dup block numbers */ 172 173 /* 174 * Linked list of inodes with zero link counts. 175 */ 176 struct zlncnt { 177 struct zlncnt *next; 178 ino_t zlncnt; 179 }; 180 struct zlncnt *zlnhead; /* head of zero link count list */ 181 182 /* 183 * Inode cache data structures. 184 */ 185 struct inoinfo { 186 struct inoinfo *i_nexthash; /* next entry in hash chain */ 187 ino_t i_number; /* inode number of this entry */ 188 ino_t i_parent; /* inode number of parent */ 189 ino_t i_dotdot; /* inode number of `..' */ 190 size_t i_isize; /* size of inode */ 191 u_int i_numblks; /* size of block array in bytes */ 192 ufs_daddr_t i_blks[1]; /* actually longer */ 193 } **inphead, **inpsort; 194 long numdirs, dirhash, listmax, inplast; 195 long countdirs; /* number of directories we actually found */ 196 197 #define MIBSIZE 3 /* size of fsck sysctl MIBs */ 198 int adjrefcnt[MIBSIZE]; /* MIB command to adjust inode reference cnt */ 199 int adjblkcnt[MIBSIZE]; /* MIB command to adjust inode block count */ 200 int freefiles[MIBSIZE]; /* MIB command to free a set of files */ 201 int freedirs[MIBSIZE]; /* MIB command to free a set of directories */ 202 int freeblks[MIBSIZE]; /* MIB command to free a set of data blocks */ 203 struct fsck_cmd cmd; /* sysctl filesystem update commands */ 204 char snapname[BUFSIZ]; /* when doing snapshots, the name of the file */ 205 char *cdevname; /* name of device being checked */ 206 long dev_bsize; /* computed value of DEV_BSIZE */ 207 long secsize; /* actual disk sector size */ 208 char nflag; /* assume a no response */ 209 char yflag; /* assume a yes response */ 210 int bkgrdflag; /* use a snapshot to run on an active system */ 211 int bflag; /* location of alternate super block */ 212 int debug; /* output debugging info */ 213 int cvtlevel; /* convert to newer filesystem format */ 214 int bkgrdcheck; /* determine if background check is possible */ 215 char usedsoftdep; /* just fix soft dependency inconsistencies */ 216 char preen; /* just fix normal inconsistencies */ 217 char rerun; /* rerun fsck. Only used in non-preen mode */ 218 int returntosingle; /* 1 => return to single user mode on exit */ 219 char resolved; /* cleared if unresolved changes => not clean */ 220 char havesb; /* superblock has been read */ 221 char skipclean; /* skip clean filesystems if preening */ 222 int fsmodified; /* 1 => write done to filesystem */ 223 int fsreadfd; /* file descriptor for reading filesystem */ 224 int fswritefd; /* file descriptor for writing filesystem */ 225 226 ufs_daddr_t maxfsblock; /* number of blocks in the filesystem */ 227 char *blockmap; /* ptr to primary blk allocation map */ 228 ino_t maxino; /* number of inodes in filesystem */ 229 230 ino_t lfdir; /* lost & found directory inode number */ 231 char *lfname; /* lost & found directory name */ 232 int lfmode; /* lost & found directory creation mode */ 233 234 ufs_daddr_t n_blks; /* number of blocks in use */ 235 ufs_daddr_t n_files; /* number of files in use */ 236 237 int got_siginfo; /* received a SIGINFO */ 238 239 #define clearinode(dp) (*(dp) = zino) 240 struct dinode zino; 241 242 #define setbmap(blkno) setbit(blockmap, blkno) 243 #define testbmap(blkno) isset(blockmap, blkno) 244 #define clrbmap(blkno) clrbit(blockmap, blkno) 245 246 #define STOP 0x01 247 #define SKIP 0x02 248 #define KEEPON 0x04 249 #define ALTERED 0x08 250 #define FOUND 0x10 251 252 #define EEXIT 8 /* Standard error exit. */ 253 254 struct fstab; 255 256 257 void adjust(struct inodesc *, int lcnt); 258 ufs_daddr_t allocblk(long frags); 259 ino_t allocdir(ino_t parent, ino_t request, int mode); 260 ino_t allocino(ino_t request, int type); 261 void blkerror(ino_t ino, char *type, ufs_daddr_t blk); 262 char *blockcheck(char *name); 263 int bread(int fd, char *buf, ufs_daddr_t blk, long size); 264 void bufinit(void); 265 void bwrite(int fd, char *buf, ufs_daddr_t blk, long size); 266 void cacheino(struct dinode *dp, ino_t inumber); 267 void catch(int); 268 void catchquit(int); 269 int changeino(ino_t dir, char *name, ino_t newnum); 270 int chkrange(ufs_daddr_t blk, int cnt); 271 void ckfini(int markclean); 272 int ckinode(struct dinode *dp, struct inodesc *); 273 void clri(struct inodesc *, char *type, int flag); 274 int clearentry(struct inodesc *); 275 void direrror(ino_t ino, char *errmesg); 276 int dirscan(struct inodesc *); 277 int dofix(struct inodesc *, char *msg); 278 void ffs_clrblock(struct fs *, u_char *, ufs_daddr_t); 279 void ffs_fragacct(struct fs *, int, int32_t [], int); 280 int ffs_isblock(struct fs *, u_char *, ufs_daddr_t); 281 void ffs_setblock(struct fs *, u_char *, ufs_daddr_t); 282 void fileerror(ino_t cwd, ino_t ino, char *errmesg); 283 int findino(struct inodesc *); 284 int findname(struct inodesc *); 285 void flush(int fd, struct bufarea *bp); 286 void freeblk(ufs_daddr_t blkno, long frags); 287 void freeino(ino_t ino); 288 void freeinodebuf(void); 289 int ftypeok(struct dinode *dp); 290 void getblk(struct bufarea *bp, ufs_daddr_t blk, long size); 291 struct bufarea *getdatablk(ufs_daddr_t blkno, long size); 292 struct inoinfo *getinoinfo(ino_t inumber); 293 struct dinode *getnextinode(ino_t inumber); 294 void getpathname(char *namebuf, ino_t curdir, ino_t ino); 295 struct dinode *ginode(ino_t inumber); 296 void infohandler(int sig); 297 void inocleanup(void); 298 void inodirty(void); 299 struct inostat *inoinfo(ino_t inum); 300 int linkup(ino_t orphan, ino_t parentdir, char *name); 301 int makeentry(ino_t parent, ino_t ino, char *name); 302 void panic(const char *fmt, ...) __printflike(1, 2); 303 void pass1(void); 304 void pass1b(void); 305 int pass1check(struct inodesc *); 306 void pass2(void); 307 void pass3(void); 308 void pass4(void); 309 int pass4check(struct inodesc *); 310 void pass5(void); 311 void pfatal(const char *fmt, ...) __printflike(1, 2); 312 void pinode(ino_t ino); 313 void propagate(void); 314 void pwarn(const char *fmt, ...) __printflike(1, 2); 315 int readsb(int listerr); 316 int reply(char *question); 317 void rwerror(char *mesg, ufs_daddr_t blk); 318 void sblock_init(void); 319 void setinodebuf(ino_t); 320 int setup(char *dev); 321