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/* $OpenBSD: fsck.h,v 1.13 2021/01/27 05:03:23 deraadt Exp $ */
/* $NetBSD: fsck.h,v 1.1 1997/06/11 11:21:47 bouyer Exp $ */
/*
* Copyright (c) 1997 Manuel Bouyer.
* 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
*/
#define MAXDUP 10 /* limit on dup blks (per inode) */
#define MAXBAD 10 /* limit on bad blks (per inode) */
#define MAXBUFSPACE 80*1024 /* maximum space to allocate to buffers */
#define INOBUFSIZE 128*1024 /* size of buffer to read inodes in pass1 */
#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 bufarea {
struct bufarea *b_next; /* free list queue */
struct bufarea *b_prev; /* free list queue */
daddr32_t b_bno;
int b_size;
int b_errs;
int b_flags;
union {
char *b_buf; /* buffer space */
daddr32_t *b_indir; /* indirect block */
struct ext2fs *b_fs; /* super block */
struct ext2_gd *b_cgd; /* cylinder group descriptor */
struct ext2fs_dinode *b_dinode; /* inode block */
} b_un;
char b_dirty;
};
#define B_INUSE 1
#define MINBUFS 5 /* minimum number of buffers required */
extern struct bufarea bufhead; /* head of list of other blks in filesys */
extern struct bufarea sblk; /* file system superblock */
extern struct bufarea asblk; /* first alternate superblock */
extern struct bufarea *pdirbp; /* current directory contents */
extern struct bufarea *pbp; /* current inode block */
extern struct bufarea *getdatablk(daddr32_t, long);
extern struct m_ext2fs sblock;
#define dirty(bp) (bp)->b_dirty = 1
#define initbarea(bp) \
(bp)->b_dirty = 0; \
(bp)->b_bno = (daddr32_t)-1; \
(bp)->b_flags = 0;
#define sbdirty() copyback_sb(&sblk); sblk.b_dirty = 1
enum fixstate {DONTKNOW, NOFIX, FIX, IGNORE};
struct inodesc {
enum fixstate id_fix; /* policy on fixing errors */
int (*id_func) /* function to be applied to blocks of inode */
(struct inodesc *);
ino_t id_number; /* inode number described */
ino_t id_parent; /* for DATA nodes, their parent */
daddr32_t id_blkno; /* current block number being examined */
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 ext2fs_direct *id_dirp; /* for DATA nodes, ptr to current entry */
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;
daddr32_t dup;
};
extern struct dups *duplist; /* head of dup list */
extern struct dups *muldup; /* end of unique duplicate dup block numbers */
/*
* Linked list of inodes with zero link counts.
*/
struct zlncnt {
struct zlncnt *next;
ino_t zlncnt;
};
extern struct zlncnt *zlnhead; /* head of zero link count list */
/*
* Inode cache data structures.
*/
extern 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 `..' */
u_int64_t i_isize; /* size of inode */
u_int i_numblks; /* size of block array in bytes */
daddr32_t i_blks[1]; /* actually longer */
} **inphead, **inpsort;
extern long numdirs, listmax, inplast;
extern long secsize; /* actual disk sector size */
extern char nflag; /* assume a no response */
extern char yflag; /* assume a yes response */
extern int bflag; /* location of alternate super block */
extern int debug; /* output debugging info */
extern int preen; /* just fix normal inconsistencies */
extern char havesb; /* superblock has been read */
extern char skipclean; /* skip clean file systems if preening */
extern int fsmodified; /* 1 => write done to file system */
extern int fsreadfd; /* file descriptor for reading file system */
extern int fswritefd; /* file descriptor for writing file system */
extern int rerun; /* rerun fsck. Only used in non-preen mode */
extern daddr32_t maxfsblock; /* number of blocks in the file system */
extern char *blockmap; /* ptr to primary blk allocation map */
extern ino_t maxino; /* number of inodes in file system */
extern ino_t lastino; /* last inode in use */
extern char *statemap; /* ptr to inode state table */
extern u_char *typemap; /* ptr to inode type table */
extern int16_t *lncntp; /* ptr to link count table */
extern ino_t lfdir; /* lost & found directory inode number */
extern char *lfname; /* lost & found directory name */
extern int lfmode; /* lost & found directory creation mode */
extern daddr32_t n_blks; /* number of blocks in use */
extern daddr32_t n_files; /* number of files in use */
#define clearinode(dp) (*(dp) = zino)
extern struct ext2fs_dinode zino;
#define setbmap(blkno) setbit(blockmap, blkno)
#define testbmap(blkno) isset(blockmap, blkno)
#define clrbmap(blkno) clrbit(blockmap, blkno)
#define STOP 0x01
#define SKIP 0x02
#define KEEPON 0x04
#define ALTERED 0x08
#define FOUND 0x10
struct ext2fs_dinode *ginode(ino_t);
struct inoinfo *getinoinfo(ino_t);
void getblk(struct bufarea *, daddr32_t, long);
ino_t allocino(ino_t, int);
void copyback_sb(struct bufarea*);
daddr32_t cgoverhead(int); /* overhead per cg */
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