215 lines
7.9 KiB
C
215 lines
7.9 KiB
C
/* $NetBSD: fsck.h,v 1.4 2000/01/28 16:01:46 bouyer Exp $ */
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/*
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* Copyright (c) 1997 Manuel Bouyer.
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* Copyright (c) 1980, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)fsck.h 8.1 (Berkeley) 6/5/93
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*/
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#define MAXDUP 10 /* limit on dup blks (per inode) */
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#define MAXBAD 10 /* limit on bad blks (per inode) */
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#define MAXBUFSPACE 80*1024 /* maximum space to allocate to buffers */
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#define INOBUFSIZE 128*1024 /* size of buffer to read inodes in pass1 */
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#ifndef BUFSIZ
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#define BUFSIZ 1024
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#endif
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#define USTATE 01 /* inode not allocated */
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#define FSTATE 02 /* inode is file */
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#define DSTATE 03 /* inode is directory */
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#define DFOUND 04 /* directory found during descent */
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#define DCLEAR 05 /* directory is to be cleared */
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#define FCLEAR 06 /* file is to be cleared */
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/*
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* buffer cache structure.
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*/
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struct bufarea {
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struct bufarea *b_next; /* free list queue */
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struct bufarea *b_prev; /* free list queue */
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daddr_t b_bno;
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int b_size;
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int b_errs;
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int b_flags;
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union {
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char *b_buf; /* buffer space */
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daddr_t *b_indir; /* indirect block */
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struct ext2fs *b_fs; /* super block */
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struct ext2_gd *b_cgd; /* cylinder group descriptor */
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struct ext2fs_dinode *b_dinode; /* inode block */
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} b_un;
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char b_dirty;
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};
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#define B_INUSE 1
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#define MINBUFS 5 /* minimum number of buffers required */
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struct bufarea bufhead; /* head of list of other blks in filesys */
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struct bufarea sblk; /* file system superblock */
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struct bufarea asblk; /* first alternate superblock */
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struct bufarea *pdirbp; /* current directory contents */
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struct bufarea *pbp; /* current inode block */
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struct bufarea *getdatablk __P((daddr_t, long));
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struct m_ext2fs sblock;
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#define dirty(bp) (bp)->b_dirty = 1
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#define initbarea(bp) \
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(bp)->b_dirty = 0; \
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(bp)->b_bno = (daddr_t)-1; \
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(bp)->b_flags = 0;
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#define sbdirty() copyback_sb(&sblk); sblk.b_dirty = 1
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enum fixstate {DONTKNOW, NOFIX, FIX, IGNORE};
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struct inodesc {
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enum fixstate id_fix; /* policy on fixing errors */
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int (*id_func) /* function to be applied to blocks of inode */
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__P((struct inodesc *));
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ino_t id_number; /* inode number described */
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ino_t id_parent; /* for DATA nodes, their parent */
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daddr_t id_blkno; /* current block number being examined */
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int id_numfrags; /* number of frags contained in block */
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quad_t id_filesize; /* for DATA nodes, the size of the directory */
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int id_loc; /* for DATA nodes, current location in dir */
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int id_entryno; /* for DATA nodes, current entry number */
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struct ext2fs_direct *id_dirp; /* for DATA nodes, ptr to current entry */
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char *id_name; /* for DATA nodes, name to find or enter */
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char id_type; /* type of descriptor, DATA or ADDR */
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};
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/* file types */
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#define DATA 1
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#define ADDR 2
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/*
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* Linked list of duplicate blocks.
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*
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* The list is composed of two parts. The first part of the
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* list (from duplist through the node pointed to by muldup)
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* contains a single copy of each duplicate block that has been
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* found. The second part of the list (from muldup to the end)
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* contains duplicate blocks that have been found more than once.
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* To check if a block has been found as a duplicate it is only
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* necessary to search from duplist through muldup. To find the
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* total number of times that a block has been found as a duplicate
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* the entire list must be searched for occurences of the block
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* in question. The following diagram shows a sample list where
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* w (found twice), x (found once), y (found three times), and z
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* (found once) are duplicate block numbers:
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*
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* w -> y -> x -> z -> y -> w -> y
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* ^ ^
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* | |
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* duplist muldup
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*/
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struct dups {
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struct dups *next;
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daddr_t dup;
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};
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struct dups *duplist; /* head of dup list */
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struct dups *muldup; /* end of unique duplicate dup block numbers */
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/*
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* Linked list of inodes with zero link counts.
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*/
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struct zlncnt {
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struct zlncnt *next;
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ino_t zlncnt;
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};
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struct zlncnt *zlnhead; /* head of zero link count list */
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/*
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* Inode cache data structures.
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*/
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struct inoinfo {
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struct inoinfo *i_nexthash; /* next entry in hash chain */
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struct inoinfo *i_child, *i_sibling, *i_parentp;
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ino_t i_number; /* inode number of this entry */
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ino_t i_parent; /* inode number of parent */
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ino_t i_dotdot; /* inode number of `..' */
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size_t i_isize; /* size of inode */
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u_int i_numblks; /* size of block array in bytes */
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daddr_t i_blks[1]; /* actually longer */
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} **inphead, **inpsort;
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long numdirs, listmax, inplast;
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long dev_bsize; /* computed value of DEV_BSIZE */
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long secsize; /* actual disk sector size */
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char nflag; /* assume a no response */
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char yflag; /* assume a yes response */
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int bflag; /* location of alternate super block */
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int debug; /* output debugging info */
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int preen; /* just fix normal inconsistencies */
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char havesb; /* superblock has been read */
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char skipclean; /* skip clean file systems if preening */
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int fsmodified; /* 1 => write done to file system */
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int fsreadfd; /* file descriptor for reading file system */
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int fswritefd; /* file descriptor for writing file system */
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int rerun; /* rerun fsck. Only used in non-preen mode */
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daddr_t maxfsblock; /* number of blocks in the file system */
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char *blockmap; /* ptr to primary blk allocation map */
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ino_t maxino; /* number of inodes in file system */
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ino_t lastino; /* last inode in use */
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char *statemap; /* ptr to inode state table */
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u_char *typemap; /* ptr to inode type table */
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int16_t *lncntp; /* ptr to link count table */
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ino_t lfdir; /* lost & found directory inode number */
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char *lfname; /* lost & found directory name */
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int lfmode; /* lost & found directory creation mode */
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daddr_t n_blks; /* number of blocks in use */
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daddr_t n_files; /* number of files in use */
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#define clearinode(dp) (*(dp) = zino)
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struct ext2fs_dinode zino;
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#define setbmap(blkno) setbit(blockmap, blkno)
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#define testbmap(blkno) isset(blockmap, blkno)
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#define clrbmap(blkno) clrbit(blockmap, blkno)
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#define STOP 0x01
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#define SKIP 0x02
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#define KEEPON 0x04
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#define ALTERED 0x08
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#define FOUND 0x10
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struct ext2fs_dinode *ginode __P((ino_t));
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struct inoinfo *getinoinfo __P((ino_t));
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void getblk __P((struct bufarea *, daddr_t, long));
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ino_t allocino __P((ino_t, int));
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void copyback_sb __P((struct bufarea*));
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daddr_t cgoverhead __P((int)); /* overhead per cg */
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