1
0
mirror of https://git.FreeBSD.org/src.git synced 2024-12-25 11:37:56 +00:00
freebsd/sbin/fsck_ffs/fsck.h
Kirk McKusick eff68496e2 Arguments for malloc and calloc should be size_t, not int.
Use proper bounds check when trying to free cached memory.

Spotted by: Xin Li
Tested by:  Dmitry Sivachenko
MFC after:  2 weeks
2014-02-25 18:25:27 +00:00

475 lines
18 KiB
C

/*
* Copyright (c) 2002 Networks Associates Technology, Inc.
* All rights reserved.
*
* This software was developed for the FreeBSD Project by Marshall
* Kirk McKusick and Network Associates Laboratories, the Security
* Research Division of Network Associates, Inc. under DARPA/SPAWAR
* contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
* research program.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
* 4. 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 8.4 (Berkeley) 5/9/95
* $FreeBSD$
*/
#ifndef _FSCK_H_
#define _FSCK_H_
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/queue.h>
#define MAXDUP 10 /* limit on dup blks (per inode) */
#define MAXBAD 10 /* limit on bad blks (per inode) */
#define MINBUFS 10 /* minimum number of buffers required */
#define MAXBUFS 40 /* maximum space to allocate to buffers */
#define INOBUFSIZE 64*1024 /* size of buffer to read inodes in pass1 */
#define ZEROBUFSIZE (dev_bsize * 128) /* size of zero buffer used by -Z */
union dinode {
struct ufs1_dinode dp1;
struct ufs2_dinode dp2;
};
#define DIP(dp, field) \
((sblock.fs_magic == FS_UFS1_MAGIC) ? \
(dp)->dp1.field : (dp)->dp2.field)
#define DIP_SET(dp, field, val) do { \
if (sblock.fs_magic == FS_UFS1_MAGIC) \
(dp)->dp1.field = (val); \
else \
(dp)->dp2.field = (val); \
} while (0)
/*
* Each inode on the file system is described by the following structure.
* The linkcnt is initially set to the value in the inode. Each time it
* is found during the descent in passes 2, 3, and 4 the count is
* decremented. Any inodes whose count is non-zero after pass 4 needs to
* have its link count adjusted by the value remaining in ino_linkcnt.
*/
struct inostat {
char ino_state; /* state of inode, see below */
char ino_type; /* type of inode */
short ino_linkcnt; /* number of links not found */
};
/*
* Inode states.
*/
#define USTATE 0x1 /* inode not allocated */
#define FSTATE 0x2 /* inode is file */
#define FZLINK 0x3 /* inode is file with a link count of zero */
#define DSTATE 0x4 /* inode is directory */
#define DZLINK 0x5 /* inode is directory with a zero link count */
#define DFOUND 0x6 /* directory found during descent */
/* 0x7 UNUSED - see S_IS_DVALID() definition */
#define DCLEAR 0x8 /* directory is to be cleared */
#define FCLEAR 0x9 /* file is to be cleared */
/* DUNFOUND === (state == DSTATE || state == DZLINK) */
#define S_IS_DUNFOUND(state) (((state) & ~0x1) == DSTATE)
/* DVALID === (state == DSTATE || state == DZLINK || state == DFOUND) */
#define S_IS_DVALID(state) (((state) & ~0x3) == DSTATE)
#define INO_IS_DUNFOUND(ino) S_IS_DUNFOUND(inoinfo(ino)->ino_state)
#define INO_IS_DVALID(ino) S_IS_DVALID(inoinfo(ino)->ino_state)
/*
* Inode state information is contained on per cylinder group lists
* which are described by the following structure.
*/
struct inostatlist {
long il_numalloced; /* number of inodes allocated in this cg */
struct inostat *il_stat;/* inostat info for this cylinder group */
} *inostathead;
/*
* buffer cache structure.
*/
struct bufarea {
TAILQ_ENTRY(bufarea) b_list; /* buffer list */
ufs2_daddr_t b_bno;
int b_size;
int b_errs;
int b_flags;
int b_type;
union {
char *b_buf; /* buffer space */
ufs1_daddr_t *b_indir1; /* UFS1 indirect block */
ufs2_daddr_t *b_indir2; /* UFS2 indirect block */
struct fs *b_fs; /* super block */
struct cg *b_cg; /* cylinder group */
struct ufs1_dinode *b_dinode1; /* UFS1 inode block */
struct ufs2_dinode *b_dinode2; /* UFS2 inode block */
} b_un;
char b_dirty;
};
#define IBLK(bp, i) \
((sblock.fs_magic == FS_UFS1_MAGIC) ? \
(bp)->b_un.b_indir1[i] : (bp)->b_un.b_indir2[i])
#define IBLK_SET(bp, i, val) do { \
if (sblock.fs_magic == FS_UFS1_MAGIC) \
(bp)->b_un.b_indir1[i] = (val); \
else \
(bp)->b_un.b_indir2[i] = (val); \
} while (0)
/*
* Buffer flags
*/
#define B_INUSE 0x00000001 /* Buffer is in use */
/*
* Type of data in buffer
*/
#define BT_UNKNOWN 0 /* Buffer holds a superblock */
#define BT_SUPERBLK 1 /* Buffer holds a superblock */
#define BT_CYLGRP 2 /* Buffer holds a cylinder group map */
#define BT_LEVEL1 3 /* Buffer holds single level indirect */
#define BT_LEVEL2 4 /* Buffer holds double level indirect */
#define BT_LEVEL3 5 /* Buffer holds triple level indirect */
#define BT_EXTATTR 6 /* Buffer holds external attribute data */
#define BT_INODES 7 /* Buffer holds external attribute data */
#define BT_DIRDATA 8 /* Buffer holds directory data */
#define BT_DATA 9 /* Buffer holds user data */
#define BT_NUMBUFTYPES 10
#define BT_NAMES { \
"unknown", \
"Superblock", \
"Cylinder Group", \
"Single Level Indirect", \
"Double Level Indirect", \
"Triple Level Indirect", \
"External Attribute", \
"Inode Block", \
"Directory Contents", \
"User Data" }
extern long readcnt[BT_NUMBUFTYPES];
extern long totalreadcnt[BT_NUMBUFTYPES];
extern struct timespec readtime[BT_NUMBUFTYPES];
extern struct timespec totalreadtime[BT_NUMBUFTYPES];
extern struct timespec startprog;
extern struct bufarea sblk; /* file system superblock */
extern struct bufarea *pdirbp; /* current directory contents */
extern struct bufarea *pbp; /* current inode block */
#define dirty(bp) do { \
if (fswritefd < 0) \
pfatal("SETTING DIRTY FLAG IN READ_ONLY MODE\n"); \
else \
(bp)->b_dirty = 1; \
} while (0)
#define initbarea(bp, type) do { \
(bp)->b_dirty = 0; \
(bp)->b_bno = (ufs2_daddr_t)-1; \
(bp)->b_flags = 0; \
(bp)->b_type = type; \
} while (0)
#define sbdirty() dirty(&sblk)
#define sblock (*sblk.b_un.b_fs)
enum fixstate {DONTKNOW, NOFIX, FIX, IGNORE};
extern ino_t cursnapshot;
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 */
ufs_lbn_t id_lbn; /* logical block number of current block */
ufs2_daddr_t id_blkno; /* current block number being examined */
int id_numfrags; /* number of frags contained in block */
off_t id_filesize; /* for DATA nodes, the size of the directory */
ufs2_daddr_t id_entryno;/* for DATA nodes, current entry number */
int id_loc; /* for DATA nodes, current location in dir */
struct 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 /* a directory */
#define SNAP 2 /* a snapshot */
#define ADDR 3 /* anything but a directory or a snapshot */
/*
* 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;
ufs2_daddr_t dup;
};
struct dups *duplist; /* head of dup list */
struct dups *muldup; /* end of unique duplicate dup block numbers */
/*
* Inode cache data structures.
*/
struct inoinfo {
struct inoinfo *i_nexthash; /* next entry in hash chain */
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 */
ufs2_daddr_t i_blks[1]; /* actually longer */
} **inphead, **inpsort;
extern long numdirs, dirhash, listmax, inplast;
extern long countdirs; /* number of directories we actually found */
#define MIBSIZE 3 /* size of fsck sysctl MIBs */
extern int adjrefcnt[MIBSIZE]; /* MIB command to adjust inode reference cnt */
extern int adjblkcnt[MIBSIZE]; /* MIB command to adjust inode block count */
extern int adjndir[MIBSIZE]; /* MIB command to adjust number of directories */
extern int adjnbfree[MIBSIZE]; /* MIB command to adjust number of free blocks */
extern int adjnifree[MIBSIZE]; /* MIB command to adjust number of free inodes */
extern int adjnffree[MIBSIZE]; /* MIB command to adjust number of free frags */
extern int adjnumclusters[MIBSIZE]; /* MIB command to adjust number of free clusters */
extern int freefiles[MIBSIZE]; /* MIB command to free a set of files */
extern int freedirs[MIBSIZE]; /* MIB command to free a set of directories */
extern int freeblks[MIBSIZE]; /* MIB command to free a set of data blocks */
extern struct fsck_cmd cmd; /* sysctl file system update commands */
extern char snapname[BUFSIZ]; /* when doing snapshots, the name of the file */
extern char *cdevname; /* name of device being checked */
extern long dev_bsize; /* computed value of DEV_BSIZE */
extern long secsize; /* actual disk sector size */
extern u_int real_dev_bsize; /* actual disk sector size, not overriden */
extern char nflag; /* assume a no response */
extern char yflag; /* assume a yes response */
extern int bkgrdflag; /* use a snapshot to run on an active system */
extern int bflag; /* location of alternate super block */
extern int debug; /* output debugging info */
extern int Eflag; /* delete empty data blocks */
extern int Zflag; /* zero empty data blocks */
extern int inoopt; /* trim out unused inodes */
extern char ckclean; /* only do work if not cleanly unmounted */
extern int cvtlevel; /* convert to newer file system format */
extern int bkgrdcheck; /* determine if background check is possible */
extern int bkgrdsumadj; /* whether the kernel have ability to adjust superblock summary */
extern char usedsoftdep; /* just fix soft dependency inconsistencies */
extern char preen; /* just fix normal inconsistencies */
extern char rerun; /* rerun fsck. Only used in non-preen mode */
extern int returntosingle; /* 1 => return to single user mode on exit */
extern char resolved; /* cleared if unresolved changes => not clean */
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 surrender; /* Give up if reads fail */
extern int wantrestart; /* Restart fsck on early termination */
extern ufs2_daddr_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 lfdir; /* lost & found directory inode number */
extern const char *lfname; /* lost & found directory name */
extern int lfmode; /* lost & found directory creation mode */
extern ufs2_daddr_t n_blks; /* number of blocks in use */
extern ino_t n_files; /* number of files in use */
extern volatile sig_atomic_t got_siginfo; /* received a SIGINFO */
extern volatile sig_atomic_t got_sigalarm; /* received a SIGALRM */
#define clearinode(dp) \
if (sblock.fs_magic == FS_UFS1_MAGIC) { \
(dp)->dp1 = ufs1_zino; \
} else { \
(dp)->dp2 = ufs2_zino; \
}
extern struct ufs1_dinode ufs1_zino;
extern struct ufs2_dinode ufs2_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
#define EEXIT 8 /* Standard error exit. */
#define ERESTART -1
int flushentry(void);
/*
* Wrapper for malloc() that flushes the cylinder group cache to try
* to get space.
*/
static inline void*
Malloc(size_t size)
{
void *retval;
while ((retval = malloc(size)) == NULL)
if (flushentry() == 0)
break;
return (retval);
}
/*
* Wrapper for calloc() that flushes the cylinder group cache to try
* to get space.
*/
static inline void*
Calloc(size_t cnt, size_t size)
{
void *retval;
while ((retval = calloc(cnt, size)) == NULL)
if (flushentry() == 0)
break;
return (retval);
}
struct fstab;
void adjust(struct inodesc *, int lcnt);
ufs2_daddr_t allocblk(long frags);
ino_t allocdir(ino_t parent, ino_t request, int mode);
ino_t allocino(ino_t request, int type);
void blkerror(ino_t ino, const char *type, ufs2_daddr_t blk);
char *blockcheck(char *name);
int blread(int fd, char *buf, ufs2_daddr_t blk, long size);
void bufinit(void);
void blwrite(int fd, char *buf, ufs2_daddr_t blk, ssize_t size);
void blerase(int fd, ufs2_daddr_t blk, long size);
void blzero(int fd, ufs2_daddr_t blk, long size);
void cacheino(union dinode *dp, ino_t inumber);
void catch(int);
void catchquit(int);
int changeino(ino_t dir, const char *name, ino_t newnum);
int check_cgmagic(int cg, struct bufarea *cgbp);
int chkrange(ufs2_daddr_t blk, int cnt);
void ckfini(int markclean);
int ckinode(union dinode *dp, struct inodesc *);
void clri(struct inodesc *, const char *type, int flag);
int clearentry(struct inodesc *);
void direrror(ino_t ino, const char *errmesg);
int dirscan(struct inodesc *);
int dofix(struct inodesc *, const char *msg);
int eascan(struct inodesc *, struct ufs2_dinode *dp);
void fileerror(ino_t cwd, ino_t ino, const char *errmesg);
void finalIOstats(void);
int findino(struct inodesc *);
int findname(struct inodesc *);
void flush(int fd, struct bufarea *bp);
void freeblk(ufs2_daddr_t blkno, long frags);
void freeino(ino_t ino);
void freeinodebuf(void);
void fsutilinit(void);
int ftypeok(union dinode *dp);
void getblk(struct bufarea *bp, ufs2_daddr_t blk, long size);
struct bufarea *cgget(int cg);
struct bufarea *getdatablk(ufs2_daddr_t blkno, long size, int type);
struct inoinfo *getinoinfo(ino_t inumber);
union dinode *getnextinode(ino_t inumber, int rebuildcg);
void getpathname(char *namebuf, ino_t curdir, ino_t ino);
union dinode *ginode(ino_t inumber);
void infohandler(int sig);
void alarmhandler(int sig);
void inocleanup(void);
void inodirty(void);
struct inostat *inoinfo(ino_t inum);
void IOstats(char *what);
int linkup(ino_t orphan, ino_t parentdir, char *name);
int makeentry(ino_t parent, ino_t ino, const char *name);
void panic(const char *fmt, ...) __printflike(1, 2);
void pass1(void);
void pass1b(void);
int pass1check(struct inodesc *);
void pass2(void);
void pass3(void);
void pass4(void);
int pass4check(struct inodesc *);
void pass5(void);
void pfatal(const char *fmt, ...) __printflike(1, 2);
void pinode(ino_t ino);
void propagate(void);
void pwarn(const char *fmt, ...) __printflike(1, 2);
int readsb(int listerr);
int reply(const char *question);
void rwerror(const char *mesg, ufs2_daddr_t blk);
void sblock_init(void);
void setinodebuf(ino_t);
int setup(char *dev);
void gjournal_check(const char *filesys);
int suj_check(const char *filesys);
void update_maps(struct cg *, struct cg*, int);
void fsckinit(void);
#endif /* !_FSCK_H_ */