334 lines
11 KiB
C
334 lines
11 KiB
C
/* $NetBSD: fsck.h,v 1.34 2003/04/24 20:08:25 fvdl Exp $ */
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/*
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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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*
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* This software was developed for the FreeBSD Project by Marshall
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* Kirk McKusick and Network Associates Laboratories, the Security
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* Research Division of Network Associates, Inc. under DARPA/SPAWAR
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* contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
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* research program
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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 8.4 (Berkeley) 5/9/95
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*/
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#include <stdio.h>
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#include <machine/bswap.h>
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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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union dinode {
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struct ufs1_dinode dp1;
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struct ufs2_dinode dp2;
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};
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#define DIP(dp, field) \
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(is_ufs2 ? (dp)->dp2.di_##field : (dp)->dp1.di_##field)
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#ifndef BUFSIZ
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#define BUFSIZ 1024
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#endif
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/*
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* Each inode on the filesystem is described by the following structure.
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* The linkcnt is initially set to the value in the inode. Each time it
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* is found during the descent in passes 2, 3, and 4 the count is
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* decremented. Any inodes whose count is non-zero after pass 4 needs to
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* have its link count adjusted by the value remaining in ino_linkcnt.
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*/
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struct inostat {
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char ino_state; /* state of inode, see below */
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char ino_type; /* type of inode */
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short ino_linkcnt; /* number of links not found */
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};
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/*
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* Inode states.
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*/
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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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#define DMARK 07 /* used in propagate()'s traversal algorithm */
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/*
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* Inode state information is contained on per cylinder group lists
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* which are described by the following structure.
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*/
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struct inostatlist {
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long il_numalloced; /* number of inodes allocated in this cg */
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struct inostat *il_stat;/* inostat info for this cylinder group */
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} *inostathead;
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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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int32_t *b_indir1; /* indirect block */
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int64_t *b_indir2; /* indirect block */
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struct fs *b_fs; /* super block */
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struct cg *b_cg; /* cylinder group */
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struct ufs1_dinode *b_dinode1; /* UFS1 inode block */
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struct ufs2_dinode *b_dinode2; /* UFS2 inode block */
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struct appleufslabel *b_appleufs; /* Apple UFS volume label */
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} b_un;
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char b_dirty;
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};
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#define IBLK(bp, i) \
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(is_ufs2 ? (bp)->b_un.b_indir2[i] : (bp)->b_un.b_indir1[i])
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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; /* file system superblock */
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struct bufarea cgblk; /* cylinder group blocks */
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struct bufarea appleufsblk; /* Apple UFS volume label */
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struct bufarea *pdirbp; /* current directory contents */
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struct bufarea *pbp; /* current inode block */
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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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struct fs *sblock;
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struct fs *altsblock;
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struct cg *cgrp;
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#define sbdirty() \
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do { \
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memmove(sblk.b_un.b_fs, sblock, SBLOCKSIZE); \
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sb_oldfscompat_write(sblk.b_un.b_fs); \
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if (needswap) \
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ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); \
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sblk.b_dirty = 1; \
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} while (0)
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#define cgdirty() do {copyback_cg(&cgblk); cgblk.b_dirty = 1;} while (0)
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#define appleufsdirty() \
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do { \
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appleufsblk.b_un.b_appleufs->ul_checksum = 0; \
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appleufsblk.b_un.b_appleufs->ul_checksum = \
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ffs_appleufs_cksum(appleufsblk.b_un.b_appleufs); \
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appleufsblk.b_dirty = 1; \
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} while (0)
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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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int64_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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int64_t id_entryno; /* for DATA nodes, current entry number */
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struct 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 occurrences 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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int64_t i_blks[1]; /* actually longer */
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} **inphead, **inpsort;
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long numdirs, dirhash, 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 cvtlevel; /* convert to newer file system format */
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int doinglevel1; /* converting to new cylinder group format */
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int doinglevel2; /* converting to new inode format */
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int newinofmt; /* filesystem has new inode format */
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char usedsoftdep; /* just fix soft dependency inconsistencies */
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int preen; /* just fix normal inconsistencies */
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int forceimage; /* file system is an image file */
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int doswap; /* convert byte order */
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int needswap; /* need to convert byte order in memory */
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int is_ufs2; /* we're dealing with an UFS2 filesystem */
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int do_blkswap; /* need to do block addr byteswap */
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int do_dirswap; /* need to do dir entry byteswap */
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int endian; /* endian coversion */
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int markclean; /* mark file system clean when done */
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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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char resolved; /* cleared if unresolved changes => not clean */
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int isappleufs; /* filesystem is Apple UFS */
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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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int dirblksiz;
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extern ino_t lfdir; /* lost & found directory inode number */
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extern char *lfname; /* lost & found directory name */
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extern int lfmode; /* lost & found directory creation mode */
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daddr_t n_blks; /* number of blocks in use */
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ino_t n_files; /* number of files in use */
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long countdirs;
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int got_siginfo; /* received a SIGINFO */
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#define clearinode(dp) \
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do { \
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if (is_ufs2) \
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(dp)->dp2 = ufs2_zino; \
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else \
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(dp)->dp1 = ufs1_zino; \
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} while (0)
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struct ufs1_dinode ufs1_zino;
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struct ufs2_dinode ufs2_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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#define EEXIT 8 /* Standard error exit. */
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/* some inline functs to help the byte-swapping mess */
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static __inline u_int16_t iswap16 __P((u_int16_t));
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static __inline u_int32_t iswap32 __P((u_int32_t));
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static __inline u_int64_t iswap64 __P((u_int64_t));
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static __inline u_int16_t iswap16(x)
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u_int16_t x;
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{
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if (needswap)
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return bswap16(x);
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else return x;
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}
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static __inline u_int32_t iswap32(x)
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u_int32_t x;
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{
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if (needswap)
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return bswap32(x);
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else return x;
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}
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static __inline u_int64_t iswap64(x)
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u_int64_t x;
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{
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if (needswap)
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return bswap64(x);
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else return x;
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}
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