Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	sbin/fsdb/../../sbin/fsck_ffs/utilities.c	Lines:	0	304	0.0 %
Date:	2017-11-07	Branches:	0	191	0.0 %


/*	$OpenBSD: utilities.c,v 1.51 2015/10/15 03:10:05 deraadt Exp $	*/
/*	$NetBSD: utilities.c,v 1.18 1996/09/27 22:45:20 christos Exp $	*/

/*
 * 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.
 */

#include <sys/param.h>	/* DEV_BSIZE isset setbit clrbit */
#include <sys/time.h>
#include <sys/uio.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ffs/fs.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include <fcntl.h>
#include <paths.h>

#include "fsutil.h"
#include "fsck.h"
#include "extern.h"

long	diskreads, totalreads;	/* Disk cache statistics */

static void rwerror(char *, daddr_t);

int
ftypeok(union dinode *dp)
{
	switch (DIP(dp, di_mode) & IFMT) {
	case IFDIR:
	case IFREG:
	case IFBLK:
	case IFCHR:
	case IFLNK:
	case IFSOCK:
	case IFIFO:
		return (1);
	default:
		if (debug)
			printf("bad file type 0%o\n", DIP(dp, di_mode));
		return (0);
	}
}

int
reply(char *question)
{
	int persevere, c;

	if (preen)
		pfatal("INTERNAL ERROR: GOT TO reply()");
	persevere = !strcmp(question, "CONTINUE");
	printf("\n");
	if (!persevere && (nflag || fswritefd < 0)) {
		printf("%s? no\n\n", question);
		resolved = 0;
		return (0);
	}
	if (yflag || (persevere && nflag)) {
		printf("%s? yes\n\n", question);
		return (1);
	}

	do {
		printf("%s? [Fyn?] ", question);
		(void) fflush(stdout);
		c = getc(stdin);
		if (c == 'F') {
			yflag = 1;
			return (1);
		}
		while (c != '\n' && getc(stdin) != '\n') {
			if (feof(stdin)) {
				resolved = 0;
				return (0);
			}
		}
	} while (c != 'y' && c != 'Y' && c != 'n' && c != 'N');
	printf("\n");
	if (c == 'y' || c == 'Y')
		return (1);
	resolved = 0;
	return (0);
}

/*
 * Look up state information for an inode.
 */
struct inostat *
inoinfo(ino_t inum)
{
	static struct inostat unallocated = { USTATE, 0, 0 };
	struct inostatlist *ilp;
	int iloff;

	if (inum > maxino)
		errexit("inoinfo: inumber %llu out of range",
		    (unsigned long long)inum);
	ilp = &inostathead[inum / sblock.fs_ipg];
	iloff = inum % sblock.fs_ipg;
	if (iloff >= ilp->il_numalloced)
		return (&unallocated);
	return (&ilp->il_stat[iloff]);
}

/*
 * Malloc buffers and set up cache.
 */
void
bufinit(void)
{
	struct bufarea *bp;
	long bufcnt, i;
	char *bufp;

	pbp = pdirbp = NULL;
	bufp = malloc((unsigned int)sblock.fs_bsize);
	if (bufp == 0)
		errexit("cannot allocate buffer pool\n");
	cgblk.b_un.b_buf = bufp;
	initbarea(&cgblk);
	bufhead.b_next = bufhead.b_prev = &bufhead;
	bufcnt = MAXBUFSPACE / sblock.fs_bsize;
	if (bufcnt < MINBUFS)
		bufcnt = MINBUFS;
	for (i = 0; i < bufcnt; i++) {
		bp = malloc(sizeof(struct bufarea));
		bufp = malloc((unsigned int)sblock.fs_bsize);
		if (bp == NULL || bufp == NULL) {
			free(bp);
			free(bufp);
			if (i >= MINBUFS)
				break;
			errexit("cannot allocate buffer pool\n");
		}
		bp->b_un.b_buf = bufp;
		bp->b_prev = &bufhead;
		bp->b_next = bufhead.b_next;
		bufhead.b_next->b_prev = bp;
		bufhead.b_next = bp;
		initbarea(bp);
	}
	bufhead.b_size = i;	/* save number of buffers */
}

/*
 * Manage a cache of directory blocks.
 */
struct bufarea *
getdatablk(daddr_t blkno, long size)
{
	struct bufarea *bp;

	for (bp = bufhead.b_next; bp != &bufhead; bp = bp->b_next)
		if (bp->b_bno == fsbtodb(&sblock, blkno))
			goto foundit;
	for (bp = bufhead.b_prev; bp != &bufhead; bp = bp->b_prev)
		if ((bp->b_flags & B_INUSE) == 0)
			break;
	if (bp == &bufhead)
		errexit("deadlocked buffer pool\n");
	getblk(bp, blkno, size);
	/* FALLTHROUGH */
foundit:
	totalreads++;
	bp->b_prev->b_next = bp->b_next;
	bp->b_next->b_prev = bp->b_prev;
	bp->b_prev = &bufhead;
	bp->b_next = bufhead.b_next;
	bufhead.b_next->b_prev = bp;
	bufhead.b_next = bp;
	bp->b_flags |= B_INUSE;
	return (bp);
}

void
getblk(struct bufarea *bp, daddr_t blk, long size)
{
	daddr_t dblk;

	dblk = fsbtodb(&sblock, blk);
	if (bp->b_bno != dblk) {
		flush(fswritefd, bp);
		diskreads++;
		bp->b_errs = bread(fsreadfd, bp->b_un.b_buf, dblk, size);
		bp->b_bno = dblk;
		bp->b_size = size;
	}
}

void
flush(int fd, struct bufarea *bp)
{
	int i, j;

	if (!bp->b_dirty)
		return;
	if (bp->b_errs != 0)
		pfatal("WRITING %sZERO'ED BLOCK %lld TO DISK\n",
		    (bp->b_errs == bp->b_size / DEV_BSIZE) ? "" : "PARTIALLY ",
		    (long long)bp->b_bno);
	bp->b_dirty = 0;
	bp->b_errs = 0;
	bwrite(fd, bp->b_un.b_buf, bp->b_bno, (long)bp->b_size);
	if (bp != &sblk)
		return;
	for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
		bwrite(fswritefd, (char *)sblock.fs_csp + i,
		    fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
		    sblock.fs_cssize - i < sblock.fs_bsize ?
		    sblock.fs_cssize - i : sblock.fs_bsize);
	}
}

static void
rwerror(char *mesg, daddr_t blk)
{

	if (preen == 0)
		printf("\n");
	pfatal("CANNOT %s: BLK %lld", mesg, (long long)blk);
	if (reply("CONTINUE") == 0)
		errexit("Program terminated\n");
}

void
ckfini(int markclean)
{
	struct bufarea *bp, *nbp;
	int cnt = 0;
	sigset_t oset, nset;
	int64_t sblockloc;

	sigemptyset(&nset);
	sigaddset(&nset, SIGINT);
	sigprocmask(SIG_BLOCK, &nset, &oset);

	if (fswritefd < 0) {
		(void)close(fsreadfd);
		fsreadfd = -1;
		sigprocmask(SIG_SETMASK, &oset, NULL);
		return;
	}
	if (sblock.fs_magic == FS_UFS1_MAGIC) {
		sblockloc = SBLOCK_UFS1;
		sblock.fs_ffs1_time = sblock.fs_time;
		sblock.fs_ffs1_size = sblock.fs_size;
		sblock.fs_ffs1_dsize = sblock.fs_dsize;
		sblock.fs_ffs1_csaddr = sblock.fs_csaddr;
		sblock.fs_ffs1_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir;
		sblock.fs_ffs1_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree;
		sblock.fs_ffs1_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree;
		sblock.fs_ffs1_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree;
		/* Force update on next mount */
		sblock.fs_ffs1_flags &= ~FS_FLAGS_UPDATED;
	} else
		sblockloc = SBLOCK_UFS2;
	flush(fswritefd, &sblk);
	if (havesb && sblk.b_bno != sblockloc / DEV_BSIZE && !preen &&
	    reply("UPDATE STANDARD SUPERBLOCK")) {
		sblk.b_bno = sblockloc / DEV_BSIZE;
		sbdirty();
		flush(fswritefd, &sblk);
	}
	flush(fswritefd, &cgblk);
	free(cgblk.b_un.b_buf);
	for (bp = bufhead.b_prev; bp && bp != &bufhead; bp = nbp) {
		cnt++;
		flush(fswritefd, bp);
		nbp = bp->b_prev;
		free(bp->b_un.b_buf);
		free(bp);
	}
	if (bufhead.b_size != cnt)
		errexit("Panic: lost %d buffers\n", bufhead.b_size - cnt);
	pbp = pdirbp = NULL;
	if (markclean && (sblock.fs_clean & FS_ISCLEAN) == 0) {
		/*
		 * Mark the file system as clean, and sync the superblock.
		 */
		if (preen)
			pwarn("MARKING FILE SYSTEM CLEAN\n");
		else if (!reply("MARK FILE SYSTEM CLEAN"))
			markclean = 0;
		if (markclean) {
			sblock.fs_clean = FS_ISCLEAN;
			sbdirty();
			flush(fswritefd, &sblk);
		}
	}
	if (debug)
		printf("cache missed %ld of %ld (%d%%)\n", diskreads,
		    totalreads, (int)(diskreads * 100 / totalreads));
	(void)close(fsreadfd);
	fsreadfd = -1;
	(void)close(fswritefd);
	fswritefd = -1;
	sigprocmask(SIG_SETMASK, &oset, NULL);
}

int
bread(int fd, char *buf, daddr_t blk, long size)
{
	char *cp;
	int i, errs;
	off_t offset;

	offset = blk;
	offset *= DEV_BSIZE;
	if (pread(fd, buf, size, offset) == size)
		return (0);
	rwerror("READ", blk);
	errs = 0;
	memset(buf, 0, (size_t)size);
	printf("THE FOLLOWING DISK SECTORS COULD NOT BE READ:");
	for (cp = buf, i = 0; i < size; i += secsize, cp += secsize) {
		if (pread(fd, cp, secsize, offset + i) != secsize) {
			if (secsize != DEV_BSIZE)
				printf(" %lld (%lld),",
				    (long long)(offset + i) / secsize,
				    (long long)blk + i / DEV_BSIZE);
			else
				printf(" %lld,", (long long)blk +
				    i / DEV_BSIZE);
			errs++;
		}
	}
	printf("\n");
	return (errs);
}

void
bwrite(int fd, char *buf, daddr_t blk, long size)
{
	int i;
	char *cp;
	off_t offset;

	if (fd < 0)
		return;
	offset = blk;
	offset *= DEV_BSIZE;
	if (pwrite(fd, buf, size, offset) == size) {
		fsmodified = 1;
		return;
	}
	rwerror("WRITE", blk);
	printf("THE FOLLOWING SECTORS COULD NOT BE WRITTEN:");
	for (cp = buf, i = 0; i < size; i += secsize, cp += secsize)
		if (pwrite(fd, cp, secsize, offset + i) != secsize) {
			if (secsize != DEV_BSIZE)
				printf(" %lld (%lld),",
				    (long long)(offset + i) / secsize,
				    (long long)blk + i / DEV_BSIZE);
			else
				printf(" %lld,", (long long)blk +
				    i / DEV_BSIZE);
		}
	printf("\n");
	return;
}

/*
 * allocate a data block with the specified number of fragments
 */
daddr_t
allocblk(int frags)
{
	daddr_t i, baseblk;
	int j, k, cg;
	struct cg *cgp = &cgrp;

	if (frags <= 0 || frags > sblock.fs_frag)
		return (0);
	for (i = 0; i < maxfsblock - sblock.fs_frag; i += sblock.fs_frag) {
		for (j = 0; j <= sblock.fs_frag - frags; j++) {
			if (testbmap(i + j))
				continue;
			for (k = 1; k < frags; k++)
				if (testbmap(i + j + k))
					break;
			if (k < frags) {
				j += k;
				continue;
			}
			cg = dtog(&sblock, i + j);
			getblk(&cgblk, cgtod(&sblock, cg), sblock.fs_cgsize);
			if (!cg_chkmagic(cgp))
				pfatal("CG %d: BAD MAGIC NUMBER\n", cg);
			baseblk = dtogd(&sblock, i + j);

			for (k = 0; k < frags; k++) {
				setbmap(i + j + k);
				clrbit(cg_blksfree(cgp), baseblk + k);
			}
			n_blks += frags;
			if (frags == sblock.fs_frag)
				cgp->cg_cs.cs_nbfree--;
			else
				cgp->cg_cs.cs_nffree -= frags;
			return (i + j);
		}
	}
	return (0);
}

/*
 * Free a previously allocated block
 */
void
freeblk(daddr_t blkno, int frags)
{
	struct inodesc idesc;

	idesc.id_blkno = blkno;
	idesc.id_numfrags = frags;
	(void)pass4check(&idesc);
}

/*
 * Find a pathname
 */
void
getpathname(char *namebuf, size_t namebuflen, ino_t curdir, ino_t ino)
{
	int len;
	char *cp;
	struct inodesc idesc;
	static int busy = 0;

	if (curdir == ino && ino == ROOTINO) {
		(void)strlcpy(namebuf, "/", namebuflen);
		return;
	}
	if (busy ||
	    (GET_ISTATE(curdir) != DSTATE && GET_ISTATE(curdir) != DFOUND)) {
		(void)strlcpy(namebuf, "?", namebuflen);
		return;
	}
	busy = 1;
	memset(&idesc, 0, sizeof(struct inodesc));
	idesc.id_type = DATA;
	idesc.id_fix = IGNORE;
	cp = &namebuf[PATH_MAX - 1];
	*cp = '\0';
	if (curdir != ino) {
		idesc.id_parent = curdir;
		goto namelookup;
	}
	while (ino != ROOTINO) {
		idesc.id_number = ino;
		idesc.id_func = findino;
		idesc.id_name = "..";
		if ((ckinode(ginode(ino), &idesc) & FOUND) == 0)
			break;
	namelookup:
		idesc.id_number = idesc.id_parent;
		idesc.id_parent = ino;
		idesc.id_func = findname;
		idesc.id_name = namebuf;
		if ((ckinode(ginode(idesc.id_number), &idesc)&FOUND) == 0)
			break;
		len = strlen(namebuf);
		cp -= len;
		memcpy(cp, namebuf, (size_t)len);
		*--cp = '/';
		if (cp < &namebuf[MAXNAMLEN])
			break;
		ino = idesc.id_number;
	}
	busy = 0;
	if (ino != ROOTINO)
		*--cp = '?';
	memcpy(namebuf, cp, (size_t)(&namebuf[PATH_MAX] - cp));
}

/*ARGSUSED*/
void
catch(int signo)
{
	ckfini(0);			/* XXX signal race */
	_exit(12);
}

/*
 * When preening, allow a single quit to signal
 * a special exit after filesystem checks complete
 * so that reboot sequence may be interrupted.
 */
/*ARGSUSED*/
void
catchquit(int signo)
{
	extern volatile sig_atomic_t returntosingle;
	static const char message[] =
	    "returning to single-user after filesystem check\n";

	write(STDOUT_FILENO, message, sizeof(message)-1);
	returntosingle = 1;
	(void)signal(SIGQUIT, SIG_DFL);
}

/*
 * Ignore a single quit signal; wait and flush just in case.
 * Used by child processes in preen.
 */
/*ARGSUSED*/
void
voidquit(int signo)
{
	int save_errno = errno;

	sleep(1);
	(void)signal(SIGQUIT, SIG_IGN);
	(void)signal(SIGQUIT, SIG_DFL);
	errno = save_errno;
}

/*
 * determine whether an inode should be fixed.
 */
int
dofix(struct inodesc *idesc, char *msg)
{
	switch (idesc->id_fix) {

	case DONTKNOW:
		if (idesc->id_type == DATA)
			direrror(idesc->id_number, msg);
		else
			pwarn("%s", msg);
		if (preen) {
			printf(" (SALVAGED)\n");
			idesc->id_fix = FIX;
			return (ALTERED);
		}
		if (reply("SALVAGE") == 0) {
			idesc->id_fix = NOFIX;
			return (0);
		}
		idesc->id_fix = FIX;
		return (ALTERED);

	case FIX:
		return (ALTERED);

	case NOFIX:
	case IGNORE:
		return (0);

	default:
		errexit("UNKNOWN INODESC FIX MODE %d\n", idesc->id_fix);
	}
	/* NOTREACHED */
}

int (* info_fn)(char *, size_t) = NULL;
char *info_filesys = "?";

/*ARGSUSED*/
void
catchinfo(int signo)
{
	static int info_fd;
	int save_errno = errno;
	struct iovec iov[4];
	char buf[1024];

	if (signo == 0) {
		info_fd = open(_PATH_TTY, O_WRONLY);
		signal(SIGINFO, catchinfo);
	} else if (info_fd > 0 && info_fn != NULL && info_fn(buf, sizeof buf)) {
		iov[0].iov_base = info_filesys;
		iov[0].iov_len = strlen(info_filesys);
		iov[1].iov_base = ": ";
		iov[1].iov_len = sizeof ": " - 1;
		iov[2].iov_base = buf;
		iov[2].iov_len = strlen(buf);
		iov[3].iov_base = "\n";
		iov[3].iov_len = sizeof "\n" - 1;

		writev(info_fd, iov, 4);
	}
	errno = save_errno;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: utilities.c,v 1.51 2015/10/15 03:10:05 deraadt Exp $ */
2			/* $NetBSD: utilities.c,v 1.18 1996/09/27 22:45:20 christos Exp $ */
3
4			/*
5			* Copyright (c) 1980, 1986, 1993
6			* The Regents of the University of California. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			* 1. Redistributions of source code must retain the above copyright
12			* notice, this list of conditions and the following disclaimer.
13			* 2. Redistributions in binary form must reproduce the above copyright
14			* notice, this list of conditions and the following disclaimer in the
15			* documentation and/or other materials provided with the distribution.
16			* 3. Neither the name of the University nor the names of its contributors
17			* may be used to endorse or promote products derived from this software
18			* without specific prior written permission.
19			*
20			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30			* SUCH DAMAGE.
31			*/
32
33			#include <sys/param.h> /* DEV_BSIZE isset setbit clrbit */
34			#include <sys/time.h>
35			#include <sys/uio.h>
36			#include <ufs/ufs/dinode.h>
37			#include <ufs/ufs/dir.h>
38			#include <ufs/ffs/fs.h>
39			#include <signal.h>
40			#include <stdio.h>
41			#include <stdlib.h>
42			#include <string.h>
43			#include <ctype.h>
44			#include <unistd.h>
45			#include <limits.h>
46			#include <errno.h>
47			#include <fcntl.h>
48			#include <paths.h>
49
50			#include "fsutil.h"
51			#include "fsck.h"
52			#include "extern.h"
53
54			long diskreads, totalreads; /* Disk cache statistics */
55
56			static void rwerror(char *, daddr_t);
57
58			int
59			ftypeok(union dinode *dp)
60			{
61			switch (DIP(dp, di_mode) & IFMT) {
62			case IFDIR:
63			case IFREG:
64			case IFBLK:
65			case IFCHR:
66			case IFLNK:
67			case IFSOCK:
68			case IFIFO:
69			return (1);
70			default:
71			if (debug)
72			printf("bad file type 0%o\n", DIP(dp, di_mode));
73			return (0);
74			}
75			}
76
77			int
78			reply(char *question)
79			{
80			int persevere, c;
81
82			if (preen)
83			pfatal("INTERNAL ERROR: GOT TO reply()");
84			persevere = !strcmp(question, "CONTINUE");
85			printf("\n");
86			if (!persevere && (nflag \|\| fswritefd < 0)) {
87			printf("%s? no\n\n", question);
88			resolved = 0;
89			return (0);
90			}
91			if (yflag \|\| (persevere && nflag)) {
92			printf("%s? yes\n\n", question);
93			return (1);
94			}
95
96			do {
97			printf("%s? [Fyn?] ", question);
98			(void) fflush(stdout);
99			c = getc(stdin);
100			if (c == 'F') {
101			yflag = 1;
102			return (1);
103			}
104			while (c != '\n' && getc(stdin) != '\n') {
105			if (feof(stdin)) {
106			resolved = 0;
107			return (0);
108			}
109			}
110			} while (c != 'y' && c != 'Y' && c != 'n' && c != 'N');
111			printf("\n");
112			if (c == 'y' \|\| c == 'Y')
113			return (1);
114			resolved = 0;
115			return (0);
116			}
117
118			/*
119			* Look up state information for an inode.
120			*/
121			struct inostat *
122			inoinfo(ino_t inum)
123			{
124			static struct inostat unallocated = { USTATE, 0, 0 };
125			struct inostatlist *ilp;
126			int iloff;
127
128			if (inum > maxino)
129			errexit("inoinfo: inumber %llu out of range",
130			(unsigned long long)inum);
131			ilp = &inostathead[inum / sblock.fs_ipg];
132			iloff = inum % sblock.fs_ipg;
133			if (iloff >= ilp->il_numalloced)
134			return (&unallocated);
135			return (&ilp->il_stat[iloff]);
136			}
137
138			/*
139			* Malloc buffers and set up cache.
140			*/
141			void
142			bufinit(void)
143			{
144			struct bufarea *bp;
145			long bufcnt, i;
146			char *bufp;
147
148			pbp = pdirbp = NULL;
149			bufp = malloc((unsigned int)sblock.fs_bsize);
150			if (bufp == 0)
151			errexit("cannot allocate buffer pool\n");
152			cgblk.b_un.b_buf = bufp;
153			initbarea(&cgblk);
154			bufhead.b_next = bufhead.b_prev = &bufhead;
155			bufcnt = MAXBUFSPACE / sblock.fs_bsize;
156			if (bufcnt < MINBUFS)
157			bufcnt = MINBUFS;
158			for (i = 0; i < bufcnt; i++) {
159			bp = malloc(sizeof(struct bufarea));
160			bufp = malloc((unsigned int)sblock.fs_bsize);
161			if (bp == NULL \|\| bufp == NULL) {
162			free(bp);
163			free(bufp);
164			if (i >= MINBUFS)
165			break;
166			errexit("cannot allocate buffer pool\n");
167			}
168			bp->b_un.b_buf = bufp;
169			bp->b_prev = &bufhead;
170			bp->b_next = bufhead.b_next;
171			bufhead.b_next->b_prev = bp;
172			bufhead.b_next = bp;
173			initbarea(bp);
174			}
175			bufhead.b_size = i; /* save number of buffers */
176			}
177
178			/*
179			* Manage a cache of directory blocks.
180			*/
181			struct bufarea *
182			getdatablk(daddr_t blkno, long size)
183			{
184			struct bufarea *bp;
185
186			for (bp = bufhead.b_next; bp != &bufhead; bp = bp->b_next)
187			if (bp->b_bno == fsbtodb(&sblock, blkno))
188			goto foundit;
189			for (bp = bufhead.b_prev; bp != &bufhead; bp = bp->b_prev)
190			if ((bp->b_flags & B_INUSE) == 0)
191			break;
192			if (bp == &bufhead)
193			errexit("deadlocked buffer pool\n");
194			getblk(bp, blkno, size);
195			/* FALLTHROUGH */
196			foundit:
197			totalreads++;
198			bp->b_prev->b_next = bp->b_next;
199			bp->b_next->b_prev = bp->b_prev;
200			bp->b_prev = &bufhead;
201			bp->b_next = bufhead.b_next;
202			bufhead.b_next->b_prev = bp;
203			bufhead.b_next = bp;
204			bp->b_flags \|= B_INUSE;
205			return (bp);
206			}
207
208			void
209			getblk(struct bufarea *bp, daddr_t blk, long size)
210			{
211			daddr_t dblk;
212
213			dblk = fsbtodb(&sblock, blk);
214			if (bp->b_bno != dblk) {
215			flush(fswritefd, bp);
216			diskreads++;
217			bp->b_errs = bread(fsreadfd, bp->b_un.b_buf, dblk, size);
218			bp->b_bno = dblk;
219			bp->b_size = size;
220			}
221			}
222
223			void
224			flush(int fd, struct bufarea *bp)
225			{
226			int i, j;
227
228			if (!bp->b_dirty)
229			return;
230			if (bp->b_errs != 0)
231			pfatal("WRITING %sZERO'ED BLOCK %lld TO DISK\n",
232			(bp->b_errs == bp->b_size / DEV_BSIZE) ? "" : "PARTIALLY ",
233			(long long)bp->b_bno);
234			bp->b_dirty = 0;
235			bp->b_errs = 0;
236			bwrite(fd, bp->b_un.b_buf, bp->b_bno, (long)bp->b_size);
237			if (bp != &sblk)
238			return;
239			for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
240			bwrite(fswritefd, (char *)sblock.fs_csp + i,
241			fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
242			sblock.fs_cssize - i < sblock.fs_bsize ?
243			sblock.fs_cssize - i : sblock.fs_bsize);
244			}
245			}
246
247			static void
248			rwerror(char *mesg, daddr_t blk)
249			{
250
251			if (preen == 0)
252			printf("\n");
253			pfatal("CANNOT %s: BLK %lld", mesg, (long long)blk);
254			if (reply("CONTINUE") == 0)
255			errexit("Program terminated\n");
256			}
257
258			void
259			ckfini(int markclean)
260			{
261			struct bufarea bp, nbp;
262			int cnt = 0;
263			sigset_t oset, nset;
264			int64_t sblockloc;
265
266			sigemptyset(&nset);
267			sigaddset(&nset, SIGINT);
268			sigprocmask(SIG_BLOCK, &nset, &oset);
269
270			if (fswritefd < 0) {
271			(void)close(fsreadfd);
272			fsreadfd = -1;
273			sigprocmask(SIG_SETMASK, &oset, NULL);
274			return;
275			}
276			if (sblock.fs_magic == FS_UFS1_MAGIC) {
277			sblockloc = SBLOCK_UFS1;
278			sblock.fs_ffs1_time = sblock.fs_time;
279			sblock.fs_ffs1_size = sblock.fs_size;
280			sblock.fs_ffs1_dsize = sblock.fs_dsize;
281			sblock.fs_ffs1_csaddr = sblock.fs_csaddr;
282			sblock.fs_ffs1_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir;
283			sblock.fs_ffs1_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree;
284			sblock.fs_ffs1_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree;
285			sblock.fs_ffs1_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree;
286			/* Force update on next mount */
287			sblock.fs_ffs1_flags &= ~FS_FLAGS_UPDATED;
288			} else
289			sblockloc = SBLOCK_UFS2;
290			flush(fswritefd, &sblk);
291			if (havesb && sblk.b_bno != sblockloc / DEV_BSIZE && !preen &&
292			reply("UPDATE STANDARD SUPERBLOCK")) {
293			sblk.b_bno = sblockloc / DEV_BSIZE;
294			sbdirty();
295			flush(fswritefd, &sblk);
296			}
297			flush(fswritefd, &cgblk);
298			free(cgblk.b_un.b_buf);
299			for (bp = bufhead.b_prev; bp && bp != &bufhead; bp = nbp) {
300			cnt++;
301			flush(fswritefd, bp);
302			nbp = bp->b_prev;
303			free(bp->b_un.b_buf);
304			free(bp);
305			}
306			if (bufhead.b_size != cnt)
307			errexit("Panic: lost %d buffers\n", bufhead.b_size - cnt);
308			pbp = pdirbp = NULL;
309			if (markclean && (sblock.fs_clean & FS_ISCLEAN) == 0) {
310			/*
311			* Mark the file system as clean, and sync the superblock.
312			*/
313			if (preen)
314			pwarn("MARKING FILE SYSTEM CLEAN\n");
315			else if (!reply("MARK FILE SYSTEM CLEAN"))
316			markclean = 0;
317			if (markclean) {
318			sblock.fs_clean = FS_ISCLEAN;
319			sbdirty();
320			flush(fswritefd, &sblk);
321			}
322			}
323			if (debug)
324			printf("cache missed %ld of %ld (%d%%)\n", diskreads,
325			totalreads, (int)(diskreads * 100 / totalreads));
326			(void)close(fsreadfd);
327			fsreadfd = -1;
328			(void)close(fswritefd);
329			fswritefd = -1;
330			sigprocmask(SIG_SETMASK, &oset, NULL);
331			}
332
333			int
334			bread(int fd, char *buf, daddr_t blk, long size)
335			{
336			char *cp;
337			int i, errs;
338			off_t offset;
339
340			offset = blk;
341			offset *= DEV_BSIZE;
342			if (pread(fd, buf, size, offset) == size)
343			return (0);
344			rwerror("READ", blk);
345			errs = 0;
346			memset(buf, 0, (size_t)size);
347			printf("THE FOLLOWING DISK SECTORS COULD NOT BE READ:");
348			for (cp = buf, i = 0; i < size; i += secsize, cp += secsize) {
349			if (pread(fd, cp, secsize, offset + i) != secsize) {
350			if (secsize != DEV_BSIZE)
351			printf(" %lld (%lld),",
352			(long long)(offset + i) / secsize,
353			(long long)blk + i / DEV_BSIZE);
354			else
355			printf(" %lld,", (long long)blk +
356			i / DEV_BSIZE);
357			errs++;
358			}
359			}
360			printf("\n");
361			return (errs);
362			}
363
364			void
365			bwrite(int fd, char *buf, daddr_t blk, long size)
366			{
367			int i;
368			char *cp;
369			off_t offset;
370
371			if (fd < 0)
372			return;
373			offset = blk;
374			offset *= DEV_BSIZE;
375			if (pwrite(fd, buf, size, offset) == size) {
376			fsmodified = 1;
377			return;
378			}
379			rwerror("WRITE", blk);
380			printf("THE FOLLOWING SECTORS COULD NOT BE WRITTEN:");
381			for (cp = buf, i = 0; i < size; i += secsize, cp += secsize)
382			if (pwrite(fd, cp, secsize, offset + i) != secsize) {
383			if (secsize != DEV_BSIZE)
384			printf(" %lld (%lld),",
385			(long long)(offset + i) / secsize,
386			(long long)blk + i / DEV_BSIZE);
387			else
388			printf(" %lld,", (long long)blk +
389			i / DEV_BSIZE);
390			}
391			printf("\n");
392			return;
393			}
394
395			/*
396			* allocate a data block with the specified number of fragments
397			*/
398			daddr_t
399			allocblk(int frags)
400			{
401			daddr_t i, baseblk;
402			int j, k, cg;
403			struct cg *cgp = &cgrp;
404
405			if (frags <= 0 \|\| frags > sblock.fs_frag)
406			return (0);
407			for (i = 0; i < maxfsblock - sblock.fs_frag; i += sblock.fs_frag) {
408			for (j = 0; j <= sblock.fs_frag - frags; j++) {
409			if (testbmap(i + j))
410			continue;
411			for (k = 1; k < frags; k++)
412			if (testbmap(i + j + k))
413			break;
414			if (k < frags) {
415			j += k;
416			continue;
417			}
418			cg = dtog(&sblock, i + j);
419			getblk(&cgblk, cgtod(&sblock, cg), sblock.fs_cgsize);
420			if (!cg_chkmagic(cgp))
421			pfatal("CG %d: BAD MAGIC NUMBER\n", cg);
422			baseblk = dtogd(&sblock, i + j);
423
424			for (k = 0; k < frags; k++) {
425			setbmap(i + j + k);
426			clrbit(cg_blksfree(cgp), baseblk + k);
427			}
428			n_blks += frags;
429			if (frags == sblock.fs_frag)
430			cgp->cg_cs.cs_nbfree--;
431			else
432			cgp->cg_cs.cs_nffree -= frags;
433			return (i + j);
434			}
435			}
436			return (0);
437			}
438
439			/*
440			* Free a previously allocated block
441			*/
442			void
443			freeblk(daddr_t blkno, int frags)
444			{
445			struct inodesc idesc;
446
447			idesc.id_blkno = blkno;
448			idesc.id_numfrags = frags;
449			(void)pass4check(&idesc);
450			}
451
452			/*
453			* Find a pathname
454			*/
455			void
456			getpathname(char *namebuf, size_t namebuflen, ino_t curdir, ino_t ino)
457			{
458			int len;
459			char *cp;
460			struct inodesc idesc;
461			static int busy = 0;
462
463			if (curdir == ino && ino == ROOTINO) {
464			(void)strlcpy(namebuf, "/", namebuflen);
465			return;
466			}
467			if (busy \|\|
468			(GET_ISTATE(curdir) != DSTATE && GET_ISTATE(curdir) != DFOUND)) {
469			(void)strlcpy(namebuf, "?", namebuflen);
470			return;
471			}
472			busy = 1;
473			memset(&idesc, 0, sizeof(struct inodesc));
474			idesc.id_type = DATA;
475			idesc.id_fix = IGNORE;
476			cp = &namebuf[PATH_MAX - 1];
477			*cp = '\0';
478			if (curdir != ino) {
479			idesc.id_parent = curdir;
480			goto namelookup;
481			}
482			while (ino != ROOTINO) {
483			idesc.id_number = ino;
484			idesc.id_func = findino;
485			idesc.id_name = "..";
486			if ((ckinode(ginode(ino), &idesc) & FOUND) == 0)
487			break;
488			namelookup:
489			idesc.id_number = idesc.id_parent;
490			idesc.id_parent = ino;
491			idesc.id_func = findname;
492			idesc.id_name = namebuf;
493			if ((ckinode(ginode(idesc.id_number), &idesc)&FOUND) == 0)
494			break;
495			len = strlen(namebuf);
496			cp -= len;
497			memcpy(cp, namebuf, (size_t)len);
498			*--cp = '/';
499			if (cp < &namebuf[MAXNAMLEN])
500			break;
501			ino = idesc.id_number;
502			}
503			busy = 0;
504			if (ino != ROOTINO)
505			*--cp = '?';
506			memcpy(namebuf, cp, (size_t)(&namebuf[PATH_MAX] - cp));
507			}
508
509			/ARGSUSED/
510			void
511			catch(int signo)
512			{
513			ckfini(0); /* XXX signal race */
514			_exit(12);
515			}
516
517			/*
518			* When preening, allow a single quit to signal
519			* a special exit after filesystem checks complete
520			* so that reboot sequence may be interrupted.
521			*/
522			/ARGSUSED/
523			void
524			catchquit(int signo)
525			{
526			extern volatile sig_atomic_t returntosingle;
527			static const char message[] =
528			"returning to single-user after filesystem check\n";
529
530			write(STDOUT_FILENO, message, sizeof(message)-1);
531			returntosingle = 1;
532			(void)signal(SIGQUIT, SIG_DFL);
533			}
534
535			/*
536			* Ignore a single quit signal; wait and flush just in case.
537			* Used by child processes in preen.
538			*/
539			/ARGSUSED/
540			void
541			voidquit(int signo)
542			{
543			int save_errno = errno;
544
545			sleep(1);
546			(void)signal(SIGQUIT, SIG_IGN);
547			(void)signal(SIGQUIT, SIG_DFL);
548			errno = save_errno;
549			}
550
551			/*
552			* determine whether an inode should be fixed.
553			*/
554			int
555			dofix(struct inodesc idesc, char msg)
556			{
557			switch (idesc->id_fix) {
558
559			case DONTKNOW:
560			if (idesc->id_type == DATA)
561			direrror(idesc->id_number, msg);
562			else
563			pwarn("%s", msg);
564			if (preen) {
565			printf(" (SALVAGED)\n");
566			idesc->id_fix = FIX;
567			return (ALTERED);
568			}
569			if (reply("SALVAGE") == 0) {
570			idesc->id_fix = NOFIX;
571			return (0);
572			}
573			idesc->id_fix = FIX;
574			return (ALTERED);
575
576			case FIX:
577			return (ALTERED);
578
579			case NOFIX:
580			case IGNORE:
581			return (0);
582
583			default:
584			errexit("UNKNOWN INODESC FIX MODE %d\n", idesc->id_fix);
585			}
586			/* NOTREACHED */
587			}
588
589			int (* info_fn)(char *, size_t) = NULL;
590			char *info_filesys = "?";
591
592			/ARGSUSED/
593			void
594			catchinfo(int signo)
595			{
596			static int info_fd;
597			int save_errno = errno;
598			struct iovec iov[4];
599			char buf[1024];
600
601			if (signo == 0) {
602			info_fd = open(_PATH_TTY, O_WRONLY);
603			signal(SIGINFO, catchinfo);
604			} else if (info_fd > 0 && info_fn != NULL && info_fn(buf, sizeof buf)) {
605			iov[0].iov_base = info_filesys;
606			iov[0].iov_len = strlen(info_filesys);
607			iov[1].iov_base = ": ";
608			iov[1].iov_len = sizeof ": " - 1;
609			iov[2].iov_base = buf;
610			iov[2].iov_len = strlen(buf);
611			iov[3].iov_base = "\n";
612			iov[3].iov_len = sizeof "\n" - 1;
613
614			writev(info_fd, iov, 4);
615			}
616			errno = save_errno;
617			}