NetBSD/sbin/fsck_lfs/fsck.h

/* $NetBSD: fsck.h,v 1.15 2005/06/27 02:48:28 christos Exp $	 */

/*-
 * Copyright (c) 1997 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Konrad E. Schroder <perseant@hhhh.org>.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the NetBSD
 *      Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Copyright (c) 1980, 1986, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)fsck.h	8.1 (Berkeley) 6/5/93
 */

#ifdef KS_DEBUG
#include <err.h>
#define debug_printf warn
#else
#define debug_printf
#endif

#define	MAXDUP		10	/* limit on dup blks (per inode) */
#define	MAXBAD		10	/* limit on bad blks (per inode) */
#define	MAXBUFSPACE	40*1024	/* maximum space to allocate to buffers */
#define	INOBUFSIZE	56*1024	/* size of buffer to read inodes in pass1 */

#ifndef BUFSIZ
#define BUFSIZ 1024
#endif

#define	USTATE	01		/* inode not allocated */
#define	FSTATE	02		/* inode is file */
#define	DSTATE	03		/* inode is directory */
#define	DFOUND	04		/* directory found during descent */
#define	DCLEAR	05		/* directory is to be cleared */
#define	FCLEAR	06		/* file is to be cleared */

/*
 * buffer cache structure.
 */
struct ubufarea {
	struct ubufarea *b_next;	/* free list queue */
	struct ubufarea *b_prev;	/* free list queue */
	daddr_t b_bno;
	int b_size;
	int b_errs;
	int b_flags;
	union {
		char *b_buf;	/* buffer space */
		/* XXX ondisk32 */
		int32_t *b_indir;	/* indirect block */
		struct lfs *b_fs;	/* super block */
		struct cg *b_cg;/* cylinder group */
		struct ufs1_dinode *b_dinode;	/* inode block */
	}     b_un;
	char b_dirty;
};
#define	B_INUSE 1

#define	MINBUFS		5	/* minimum number of buffers required */

#define	dirty(bp)	(bp)->b_dirty = 1
#define	initbarea(bp) \
	(bp)->b_dirty = 0; \
	(bp)->b_bno = (daddr_t)-1; \
	(bp)->b_flags = 0;

enum fixstate {
	DONTKNOW, NOFIX, FIX, IGNORE
};

struct inodesc {
	enum fixstate id_fix;	/* policy on fixing errors */
	int (*id_func) (struct inodesc *);	/* function to be applied to
						 * blocks of inode */
	ino_t id_number;	/* inode number described */
	ino_t id_parent;	/* for DATA nodes, their parent */
	daddr_t id_blkno;	/* current block number being examined */
	daddr_t id_lblkno;	/* current logical block number */
	int id_numfrags;	/* number of frags contained in block */
	quad_t id_filesize;	/* for DATA nodes, the size of the directory */
	int id_loc;		/* for DATA nodes, current location in dir */
	int id_entryno;		/* for DATA nodes, current entry number */
	struct direct *id_dirp;	/* for DATA nodes, ptr to current entry */
	const char *id_name;	/* for DATA nodes, name to find or enter */
	char id_type;		/* type of descriptor, DATA or ADDR */
};
/* file types */
#define	DATA	1
#define	ADDR	2

/*
 * Linked list of duplicate blocks.
 *
 * The list is composed of two parts. The first part of the
 * list (from duplist through the node pointed to by muldup)
 * contains a single copy of each duplicate block that has been
 * found. The second part of the list (from muldup to the end)
 * contains duplicate blocks that have been found more than once.
 * To check if a block has been found as a duplicate it is only
 * necessary to search from duplist through muldup. To find the
 * total number of times that a block has been found as a duplicate
 * the entire list must be searched for occurrences of the block
 * in question. The following diagram shows a sample list where
 * w (found twice), x (found once), y (found three times), and z
 * (found once) are duplicate block numbers:
 *
 *    w -> y -> x -> z -> y -> w -> y
 *    ^		     ^
 *    |		     |
 * duplist	  muldup
 */
struct dups {
	struct dups *next;
	daddr_t dup;
};
/*
 * Linked list of inodes with zero link counts.
 */
struct zlncnt {
	struct zlncnt *next;
	ino_t zlncnt;
};
/*
 * Inode cache data structures.
 */
struct inoinfo {
	struct inoinfo *i_nexthash;	/* next entry in hash chain */
	struct inoinfo *i_child, *i_sibling, *i_parentp;
	ino_t i_number;		/* inode number of this entry */
	ino_t i_parent;		/* inode number of parent */
	ino_t i_dotdot;		/* inode number of `..' */
	size_t i_isize;		/* size of inode */
	u_int i_numblks;	/* size of block array in bytes */
	/* XXX ondisk32 */
	int32_t i_blks[1];	/* actually longer */
}     **inphead, **inpsort;

#ifndef VERBOSE_BLOCKMAP
#define	setbmap(blkno)	setbit(blockmap, blkno)
#define	testbmap(blkno)	isset(blockmap, blkno)
#define	clrbmap(blkno)	clrbit(blockmap, blkno)
#else
#define	setbmap(blkno,ino)	if(blkno > maxfsblock)raise(1); else blockmap[blkno] = ino
#define	testbmap(blkno)		blockmap[blkno]
#define	clrbmap(blkno)		blockmap[blkno] = 0
#endif

#define	STOP	0x01
#define	SKIP	0x02
#define	KEEPON	0x04
#define	ALTERED	0x08
#define	FOUND	0x10

ino_t allocino(ino_t, int);
int ino_to_fsba(struct lfs *, ino_t);
struct ufs1_dinode *ginode(ino_t);
struct inoinfo *getinoinfo(ino_t);
daddr_t lfs_ino_daddr(ino_t);
void clearinode(ino_t);
void reset_maxino(ino_t);

#include "fsck_vars.h"