211 lines
7.3 KiB
C
211 lines
7.3 KiB
C
/* $NetBSD: fsck.h,v 1.6 2002/05/23 04:05:11 perseant Exp $ */
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/*
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* Copyright (c) 1997
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* Konrad Schroder. All rights reserved.
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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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#ifdef KS_DEBUG
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#include <err.h>
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#define debug_printf warn
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#else
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#define debug_printf
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#endif
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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 40*1024 /* maximum space to allocate to buffers */
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#define INOBUFSIZE 56*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 lfs *b_fs; /* super block */
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struct cg *b_cg; /* cylinder group */
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struct 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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#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 sblock (*sblk.b_un.b_fs)
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#define ifblock (*iblk.b_un.b_dinode)
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#define sbdirty() do { \
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sblk.b_dirty = 1; \
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sblock.lfs_dlfs.dlfs_cksum = lfs_sb_cksum(&(sblock.lfs_dlfs)); \
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} while(0)
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enum fixstate {
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DONTKNOW, NOFIX, FIX, IGNORE
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};
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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)(struct inodesc *); /* function to be
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* applied to blocks of inode */
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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
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* examined */
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daddr_t id_lblkno; /* current logical block number */
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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
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* directory */
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int id_loc; /* for DATA nodes, current location
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* in dir */
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int id_entryno; /* for DATA nodes, current entry
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* number */
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struct direct *id_dirp; /* for DATA nodes, ptr to current
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* entry */
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char *id_name; /* for DATA nodes, name to find or
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* 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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/*
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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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/*
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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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#define clearinode(dp) (*(dp) = zino)
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#ifndef VERBOSE_BLOCKMAP
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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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#else
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#define setbmap(blkno,ino) if(blkno > maxfsblock)raise(1); else blockmap[blkno] = ino
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#define testbmap(blkno) blockmap[blkno]
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#define clrbmap(blkno) blockmap[blkno] = 0
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#endif
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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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ino_t allocino(ino_t, int);
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int ino_to_fsba(struct lfs *, ino_t);
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struct bufarea *getfileblk(struct lfs *, struct dinode *, ino_t);
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struct dinode *ginode(ino_t);
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struct dinode *lfs_ginode(ino_t);
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struct dinode *lfs_difind(struct lfs *, ino_t, struct dinode *);
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struct ifile *lfs_ientry(ino_t, struct bufarea **);
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struct inoinfo *getinoinfo(ino_t);
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void getblk(struct bufarea *, daddr_t, long);
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void getdblk(struct bufarea *, daddr_t, long);
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int check_summary(struct lfs *, SEGSUM *, daddr_t);
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SEGUSE *lfs_gseguse(int, struct bufarea **);
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daddr_t lfs_ino_daddr(ino_t);
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#include "fsck_vars.h"
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