1 /* $NetBSD: fsck.h,v 1.14 2008/10/09 16:56:23 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)fsck.h 8.1 (Berkeley) 6/5/93 32 */ 33 34 /* 35 * Copyright (c) 1997 Manuel Bouyer. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by Manuel Bouyer. 48 * 4. The name of the author may not be used to endorse or promote products 49 * derived from this software without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 52 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 53 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 54 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 55 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 56 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 60 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 61 * 62 * @(#)fsck.h 8.1 (Berkeley) 6/5/93 63 */ 64 65 #define MAXDUP 10 /* limit on dup blks (per inode) */ 66 #define MAXBAD 10 /* limit on bad blks (per inode) */ 67 #define MAXBUFSPACE 80*1024 /* maximum space to allocate to buffers */ 68 #define INOBUFSIZE 128*1024 /* size of buffer to read inodes in pass1 */ 69 70 #ifndef BUFSIZ 71 #define BUFSIZ 1024 72 #endif 73 74 #define USTATE 01 /* inode not allocated */ 75 #define FSTATE 02 /* inode is file */ 76 #define DSTATE 03 /* inode is directory */ 77 #define DFOUND 04 /* directory found during descent */ 78 #define DCLEAR 05 /* directory is to be cleared */ 79 #define FCLEAR 06 /* file is to be cleared */ 80 81 /* 82 * buffer cache structure. 83 */ 84 struct bufarea { 85 struct bufarea *b_next; /* free list queue */ 86 struct bufarea *b_prev; /* free list queue */ 87 daddr_t b_bno; 88 int b_size; 89 int b_errs; 90 int b_flags; 91 union { 92 char *b_buf; /* buffer space */ 93 /* XXX ondisk32 */ 94 int32_t *b_indir; /* indirect block */ 95 struct ext2fs *b_fs; /* super block */ 96 struct ext2_gd *b_cgd; /* cylinder group descriptor */ 97 struct ext2fs_dinode *b_dinode; /* inode block */ 98 } b_un; 99 char b_dirty; 100 }; 101 102 #define B_INUSE 1 103 104 #define MINBUFS 5 /* minimum number of buffers required */ 105 struct bufarea bufhead; /* head of list of other blks in filesys */ 106 struct bufarea sblk; /* file system superblock */ 107 struct bufarea asblk; /* first alternate superblock */ 108 struct bufarea *pdirbp; /* current directory contents */ 109 struct bufarea *pbp; /* current inode block */ 110 struct bufarea *getdatablk(daddr_t, long); 111 struct m_ext2fs sblock; 112 113 #define dirty(bp) (bp)->b_dirty = 1 114 #define initbarea(bp) \ 115 (bp)->b_dirty = 0; \ 116 (bp)->b_bno = (daddr_t)-1; \ 117 (bp)->b_flags = 0; 118 119 #define sbdirty() copyback_sb(&sblk); sblk.b_dirty = 1 120 121 enum fixstate {DONTKNOW, NOFIX, FIX, IGNORE}; 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 (struct inodesc *); 127 ino_t id_number; /* inode number described */ 128 ino_t id_parent; /* for DATA nodes, their parent */ 129 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 ext2fs_direct *id_dirp; /* for DATA nodes, ptr to current entry */ 135 const 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 1 140 #define ADDR 2 141 142 /* 143 * Linked list of duplicate blocks. 144 * 145 * The list is composed of two parts. The first part of the 146 * list (from duplist through the node pointed to by muldup) 147 * contains a single copy of each duplicate block that has been 148 * found. The second part of the list (from muldup to the end) 149 * contains duplicate blocks that have been found more than once. 150 * To check if a block has been found as a duplicate it is only 151 * necessary to search from duplist through muldup. To find the 152 * total number of times that a block has been found as a duplicate 153 * the entire list must be searched for occurrences of the block 154 * in question. The following diagram shows a sample list where 155 * w (found twice), x (found once), y (found three times), and z 156 * (found once) are duplicate block numbers: 157 * 158 * w -> y -> x -> z -> y -> w -> y 159 * ^ ^ 160 * | | 161 * duplist muldup 162 */ 163 struct dups { 164 struct dups *next; 165 daddr_t dup; 166 }; 167 struct dups *duplist; /* head of dup list */ 168 struct dups *muldup; /* end of unique duplicate dup block numbers */ 169 170 /* 171 * Linked list of inodes with zero link counts. 172 */ 173 struct zlncnt { 174 struct zlncnt *next; 175 ino_t zlncnt; 176 }; 177 struct zlncnt *zlnhead; /* head of zero link count list */ 178 179 /* 180 * Inode cache data structures. 181 */ 182 struct inoinfo { 183 struct inoinfo *i_nexthash; /* next entry in hash chain */ 184 struct inoinfo *i_child, *i_sibling, *i_parentp; 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 u_int64_t i_isize; /* size of inode */ 189 u_int i_numblks; /* size of block array in bytes */ 190 /* XXX ondisk32 */ 191 int32_t i_blks[1]; /* actually longer */ 192 } **inphead, **inpsort; 193 long numdirs, listmax, inplast; 194 195 long dev_bsize; /* computed value of DEV_BSIZE */ 196 long secsize; /* actual disk sector size */ 197 char nflag; /* assume a no response */ 198 char yflag; /* assume a yes response */ 199 int bflag; /* location of alternate super block */ 200 int Uflag; /* resolve user names */ 201 int debug; /* output debugging info */ 202 int preen; /* just fix normal inconsistencies */ 203 char havesb; /* superblock has been read */ 204 char skipclean; /* skip clean file systems if preening */ 205 int fsmodified; /* 1 => write done to file system */ 206 int fsreadfd; /* file descriptor for reading file system */ 207 int fswritefd; /* file descriptor for writing file system */ 208 int rerun; /* rerun fsck. Only used in non-preen mode */ 209 210 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 ino_t lastino; /* last inode in use */ 214 char *statemap; /* ptr to inode state table */ 215 u_char *typemap; /* ptr to inode type table */ 216 int16_t *lncntp; /* ptr to link count table */ 217 218 ino_t lfdir; /* lost & found directory inode number */ 219 extern const char *lfname; /* lost & found directory name */ 220 extern int lfmode; /* lost & found directory creation mode */ 221 222 daddr_t n_blks; /* number of blocks in use */ 223 daddr_t n_files; /* number of files in use */ 224 225 #define clearinode(dp) (*(dp) = zino) 226 struct ext2fs_dinode zino; 227 228 #define setbmap(blkno) setbit(blockmap, blkno) 229 #define testbmap(blkno) isset(blockmap, blkno) 230 #define clrbmap(blkno) clrbit(blockmap, blkno) 231 232 #define STOP 0x01 233 #define SKIP 0x02 234 #define KEEPON 0x04 235 #define ALTERED 0x08 236 #define FOUND 0x10 237 238 struct ext2fs_dinode *ginode(ino_t); 239 struct inoinfo *getinoinfo(ino_t); 240 void getblk(struct bufarea *, daddr_t, long); 241 ino_t allocino(ino_t, int); 242 void copyback_sb(struct bufarea*); 243 daddr_t cgoverhead(int); /* overhead per cg */ 244