fsck.h revision 143235
1/* 2 * Copyright (c) 2002 Networks Associates Technology, Inc. 3 * All rights reserved. 4 * 5 * This software was developed for the FreeBSD Project by Marshall 6 * Kirk McKusick and Network Associates Laboratories, the Security 7 * Research Division of Network Associates, Inc. under DARPA/SPAWAR 8 * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS 9 * research program. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * Copyright (c) 1980, 1986, 1993 33 * The Regents of the University of California. All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 4. Neither the name of the University nor the names of its contributors 44 * may be used to endorse or promote products derived from this software 45 * without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 50 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 51 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 57 * SUCH DAMAGE. 58 * 59 * @(#)fsck.h 8.4 (Berkeley) 5/9/95 60 * $FreeBSD: head/sbin/fsck_ffs/fsck.h 143235 2005-03-07 08:42:49Z delphij $ 61 */ 62 63#include <unistd.h> 64#include <stdlib.h> 65#include <stdio.h> 66 67#define MAXDUP 10 /* limit on dup blks (per inode) */ 68#define MAXBAD 10 /* limit on bad blks (per inode) */ 69#define MAXBUFSPACE 40*1024 /* maximum space to allocate to buffers */ 70#define INOBUFSIZE 56*1024 /* size of buffer to read inodes in pass1 */ 71 72union dinode { 73 struct ufs1_dinode dp1; 74 struct ufs2_dinode dp2; 75}; 76#define DIP(dp, field) \ 77 ((sblock.fs_magic == FS_UFS1_MAGIC) ? \ 78 (dp)->dp1.field : (dp)->dp2.field) 79 80#define DIP_SET(dp, field, val) do { \ 81 if (sblock.fs_magic == FS_UFS1_MAGIC) \ 82 (dp)->dp1.field = (val); \ 83 else \ 84 (dp)->dp2.field = (val); \ 85 } while (0) 86 87/* 88 * Each inode on the file system is described by the following structure. 89 * The linkcnt is initially set to the value in the inode. Each time it 90 * is found during the descent in passes 2, 3, and 4 the count is 91 * decremented. Any inodes whose count is non-zero after pass 4 needs to 92 * have its link count adjusted by the value remaining in ino_linkcnt. 93 */ 94struct inostat { 95 char ino_state; /* state of inode, see below */ 96 char ino_type; /* type of inode */ 97 short ino_linkcnt; /* number of links not found */ 98}; 99/* 100 * Inode states. 101 */ 102#define USTATE 0x1 /* inode not allocated */ 103#define FSTATE 0x2 /* inode is file */ 104#define FZLINK 0x3 /* inode is file with a link count of zero */ 105#define DSTATE 0x4 /* inode is directory */ 106#define DZLINK 0x5 /* inode is directory with a zero link count */ 107#define DFOUND 0x6 /* directory found during descent */ 108/* 0x7 UNUSED - see S_IS_DVALID() definition */ 109#define DCLEAR 0x8 /* directory is to be cleared */ 110#define FCLEAR 0x9 /* file is to be cleared */ 111/* DUNFOUND === (state == DSTATE || state == DZLINK) */ 112#define S_IS_DUNFOUND(state) (((state) & ~0x1) == DSTATE) 113/* DVALID === (state == DSTATE || state == DZLINK || state == DFOUND) */ 114#define S_IS_DVALID(state) (((state) & ~0x3) == DSTATE) 115#define INO_IS_DUNFOUND(ino) S_IS_DUNFOUND(inoinfo(ino)->ino_state) 116#define INO_IS_DVALID(ino) S_IS_DVALID(inoinfo(ino)->ino_state) 117/* 118 * Inode state information is contained on per cylinder group lists 119 * which are described by the following structure. 120 */ 121struct inostatlist { 122 long il_numalloced; /* number of inodes allocated in this cg */ 123 struct inostat *il_stat;/* inostat info for this cylinder group */ 124} *inostathead; 125 126/* 127 * buffer cache structure. 128 */ 129struct bufarea { 130 struct bufarea *b_next; /* free list queue */ 131 struct bufarea *b_prev; /* free list queue */ 132 ufs2_daddr_t b_bno; 133 int b_size; 134 int b_errs; 135 int b_flags; 136 union { 137 char *b_buf; /* buffer space */ 138 ufs1_daddr_t *b_indir1; /* UFS1 indirect block */ 139 ufs2_daddr_t *b_indir2; /* UFS2 indirect block */ 140 struct fs *b_fs; /* super block */ 141 struct cg *b_cg; /* cylinder group */ 142 struct ufs1_dinode *b_dinode1; /* UFS1 inode block */ 143 struct ufs2_dinode *b_dinode2; /* UFS2 inode block */ 144 } b_un; 145 char b_dirty; 146}; 147 148#define IBLK(bp, i) \ 149 ((sblock.fs_magic == FS_UFS1_MAGIC) ? \ 150 (bp)->b_un.b_indir1[i] : (bp)->b_un.b_indir2[i]) 151 152#define IBLK_SET(bp, i, val) do { \ 153 if (sblock.fs_magic == FS_UFS1_MAGIC) \ 154 (bp)->b_un.b_indir1[i] = (val); \ 155 else \ 156 (bp)->b_un.b_indir2[i] = (val); \ 157 } while (0) 158 159#define B_INUSE 1 160 161#define MINBUFS 5 /* minimum number of buffers required */ 162struct bufarea bufhead; /* head of list of other blks in filesys */ 163struct bufarea sblk; /* file system superblock */ 164struct bufarea cgblk; /* cylinder group blocks */ 165struct bufarea *pdirbp; /* current directory contents */ 166struct bufarea *pbp; /* current inode block */ 167 168#define dirty(bp) do { \ 169 if (fswritefd < 0) \ 170 pfatal("SETTING DIRTY FLAG IN READ_ONLY MODE\n"); \ 171 else \ 172 (bp)->b_dirty = 1; \ 173} while (0) 174#define initbarea(bp) do { \ 175 (bp)->b_dirty = 0; \ 176 (bp)->b_bno = (ufs2_daddr_t)-1; \ 177 (bp)->b_flags = 0; \ 178} while (0) 179 180#define sbdirty() dirty(&sblk) 181#define cgdirty() dirty(&cgblk) 182#define sblock (*sblk.b_un.b_fs) 183#define cgrp (*cgblk.b_un.b_cg) 184 185enum fixstate {DONTKNOW, NOFIX, FIX, IGNORE}; 186ino_t cursnapshot; 187 188struct inodesc { 189 enum fixstate id_fix; /* policy on fixing errors */ 190 int (*id_func)(struct inodesc *); 191 /* function to be applied to blocks of inode */ 192 ino_t id_number; /* inode number described */ 193 ino_t id_parent; /* for DATA nodes, their parent */ 194 ufs_lbn_t id_lbn; /* logical block number of current block */ 195 ufs2_daddr_t id_blkno; /* current block number being examined */ 196 int id_numfrags; /* number of frags contained in block */ 197 off_t id_filesize; /* for DATA nodes, the size of the directory */ 198 ufs2_daddr_t id_entryno;/* for DATA nodes, current entry number */ 199 int id_loc; /* for DATA nodes, current location in dir */ 200 struct direct *id_dirp; /* for DATA nodes, ptr to current entry */ 201 char *id_name; /* for DATA nodes, name to find or enter */ 202 char id_type; /* type of descriptor, DATA or ADDR */ 203}; 204/* file types */ 205#define DATA 1 /* a directory */ 206#define SNAP 2 /* a snapshot */ 207#define ADDR 3 /* anything but a directory or a snapshot */ 208 209/* 210 * Linked list of duplicate blocks. 211 * 212 * The list is composed of two parts. The first part of the 213 * list (from duplist through the node pointed to by muldup) 214 * contains a single copy of each duplicate block that has been 215 * found. The second part of the list (from muldup to the end) 216 * contains duplicate blocks that have been found more than once. 217 * To check if a block has been found as a duplicate it is only 218 * necessary to search from duplist through muldup. To find the 219 * total number of times that a block has been found as a duplicate 220 * the entire list must be searched for occurences of the block 221 * in question. The following diagram shows a sample list where 222 * w (found twice), x (found once), y (found three times), and z 223 * (found once) are duplicate block numbers: 224 * 225 * w -> y -> x -> z -> y -> w -> y 226 * ^ ^ 227 * | | 228 * duplist muldup 229 */ 230struct dups { 231 struct dups *next; 232 ufs2_daddr_t dup; 233}; 234struct dups *duplist; /* head of dup list */ 235struct dups *muldup; /* end of unique duplicate dup block numbers */ 236 237/* 238 * Inode cache data structures. 239 */ 240struct inoinfo { 241 struct inoinfo *i_nexthash; /* next entry in hash chain */ 242 ino_t i_number; /* inode number of this entry */ 243 ino_t i_parent; /* inode number of parent */ 244 ino_t i_dotdot; /* inode number of `..' */ 245 size_t i_isize; /* size of inode */ 246 u_int i_numblks; /* size of block array in bytes */ 247 ufs2_daddr_t i_blks[1]; /* actually longer */ 248} **inphead, **inpsort; 249long numdirs, dirhash, listmax, inplast; 250long countdirs; /* number of directories we actually found */ 251 252#define MIBSIZE 3 /* size of fsck sysctl MIBs */ 253int adjrefcnt[MIBSIZE]; /* MIB command to adjust inode reference cnt */ 254int adjblkcnt[MIBSIZE]; /* MIB command to adjust inode block count */ 255int adjndir[MIBSIZE]; /* MIB command to adjust number of directories */ 256int adjnbfree[MIBSIZE]; /* MIB command to adjust number of free blocks */ 257int adjnifree[MIBSIZE]; /* MIB command to adjust number of free inodes */ 258int adjnffree[MIBSIZE]; /* MIB command to adjust number of free frags */ 259int adjnumclusters[MIBSIZE]; /* MIB command to adjust number of free clusters */ 260int freefiles[MIBSIZE]; /* MIB command to free a set of files */ 261int freedirs[MIBSIZE]; /* MIB command to free a set of directories */ 262int freeblks[MIBSIZE]; /* MIB command to free a set of data blocks */ 263struct fsck_cmd cmd; /* sysctl file system update commands */ 264char snapname[BUFSIZ]; /* when doing snapshots, the name of the file */ 265char *cdevname; /* name of device being checked */ 266long dev_bsize; /* computed value of DEV_BSIZE */ 267long secsize; /* actual disk sector size */ 268char nflag; /* assume a no response */ 269char yflag; /* assume a yes response */ 270int bkgrdflag; /* use a snapshot to run on an active system */ 271int bflag; /* location of alternate super block */ 272int debug; /* output debugging info */ 273int cvtlevel; /* convert to newer file system format */ 274int bkgrdcheck; /* determine if background check is possible */ 275int bkgrdsumadj; /* whether the kernel have ability to adjust superblock summary */ 276char usedsoftdep; /* just fix soft dependency inconsistencies */ 277char preen; /* just fix normal inconsistencies */ 278char rerun; /* rerun fsck. Only used in non-preen mode */ 279int returntosingle; /* 1 => return to single user mode on exit */ 280char resolved; /* cleared if unresolved changes => not clean */ 281char havesb; /* superblock has been read */ 282char skipclean; /* skip clean file systems if preening */ 283int fsmodified; /* 1 => write done to file system */ 284int fsreadfd; /* file descriptor for reading file system */ 285int fswritefd; /* file descriptor for writing file system */ 286 287ufs2_daddr_t maxfsblock; /* number of blocks in the file system */ 288char *blockmap; /* ptr to primary blk allocation map */ 289ino_t maxino; /* number of inodes in file system */ 290 291ino_t lfdir; /* lost & found directory inode number */ 292const char *lfname; /* lost & found directory name */ 293int lfmode; /* lost & found directory creation mode */ 294 295ufs2_daddr_t n_blks; /* number of blocks in use */ 296ino_t n_files; /* number of files in use */ 297 298int got_siginfo; /* received a SIGINFO */ 299int got_sigalarm; /* received a SIGALRM */ 300 301#define clearinode(dp) \ 302 if (sblock.fs_magic == FS_UFS1_MAGIC) { \ 303 (dp)->dp1 = ufs1_zino; \ 304 } else { \ 305 (dp)->dp2 = ufs2_zino; \ 306 } 307struct ufs1_dinode ufs1_zino; 308struct ufs2_dinode ufs2_zino; 309 310#define setbmap(blkno) setbit(blockmap, blkno) 311#define testbmap(blkno) isset(blockmap, blkno) 312#define clrbmap(blkno) clrbit(blockmap, blkno) 313 314#define STOP 0x01 315#define SKIP 0x02 316#define KEEPON 0x04 317#define ALTERED 0x08 318#define FOUND 0x10 319 320#define EEXIT 8 /* Standard error exit. */ 321 322struct fstab; 323 324 325void adjust(struct inodesc *, int lcnt); 326ufs2_daddr_t allocblk(long frags); 327ino_t allocdir(ino_t parent, ino_t request, int mode); 328ino_t allocino(ino_t request, int type); 329void blkerror(ino_t ino, const char *type, ufs2_daddr_t blk); 330char *blockcheck(char *name); 331int bread(int fd, char *buf, ufs2_daddr_t blk, long size); 332void bufinit(void); 333void bwrite(int fd, char *buf, ufs2_daddr_t blk, long size); 334void cacheino(union dinode *dp, ino_t inumber); 335void catch(int); 336void catchquit(int); 337int changeino(ino_t dir, const char *name, ino_t newnum); 338int chkrange(ufs2_daddr_t blk, int cnt); 339void ckfini(int markclean); 340int ckinode(union dinode *dp, struct inodesc *); 341void clri(struct inodesc *, const char *type, int flag); 342int clearentry(struct inodesc *); 343void direrror(ino_t ino, const char *errmesg); 344int dirscan(struct inodesc *); 345int dofix(struct inodesc *, const char *msg); 346int eascan(struct inodesc *, struct ufs2_dinode *dp); 347void ffs_clrblock(struct fs *, u_char *, ufs1_daddr_t); 348void ffs_fragacct(struct fs *, int, int32_t [], int); 349int ffs_isblock(struct fs *, u_char *, ufs1_daddr_t); 350void ffs_setblock(struct fs *, u_char *, ufs1_daddr_t); 351void fileerror(ino_t cwd, ino_t ino, const char *errmesg); 352int findino(struct inodesc *); 353int findname(struct inodesc *); 354void flush(int fd, struct bufarea *bp); 355void freeblk(ufs2_daddr_t blkno, long frags); 356void freeino(ino_t ino); 357void freeinodebuf(void); 358int ftypeok(union dinode *dp); 359void getblk(struct bufarea *bp, ufs2_daddr_t blk, long size); 360struct bufarea *getdatablk(ufs2_daddr_t blkno, long size); 361struct inoinfo *getinoinfo(ino_t inumber); 362union dinode *getnextinode(ino_t inumber); 363void getpathname(char *namebuf, ino_t curdir, ino_t ino); 364union dinode *ginode(ino_t inumber); 365void infohandler(int sig); 366void alarmhandler(int sig); 367void inocleanup(void); 368void inodirty(void); 369struct inostat *inoinfo(ino_t inum); 370int linkup(ino_t orphan, ino_t parentdir, char *name); 371int makeentry(ino_t parent, ino_t ino, const char *name); 372void panic(const char *fmt, ...) __printflike(1, 2); 373void pass1(void); 374void pass1b(void); 375int pass1check(struct inodesc *); 376void pass2(void); 377void pass3(void); 378void pass4(void); 379int pass4check(struct inodesc *); 380void pass5(void); 381void pfatal(const char *fmt, ...) __printflike(1, 2); 382void pinode(ino_t ino); 383void propagate(void); 384void pwarn(const char *fmt, ...) __printflike(1, 2); 385int readsb(int listerr); 386int reply(const char *question); 387void rwerror(const char *mesg, ufs2_daddr_t blk); 388void sblock_init(void); 389void setinodebuf(ino_t); 390int setup(char *dev); 391