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Add a standalone LFS implementation. Currently not merged with ufs (FFS), 

but should be (and will be before too long).  Until then, it and ufs.?
should be easily diffable.
This commit is contained in:
cgd 1999-08-18 20:04:39 +00:00
parent 82729b7302
commit b4ecb1b468
3 changed files with 860 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
sys/lib/libsa/Makefile
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@ -1,4 +1,4 @@
# $NetBSD: Makefile,v 1.32 1999/05/07 14:28:51 drochner Exp $
# $NetBSD: Makefile,v 1.33 1999/08/18 20:04:39 cgd Exp $
LIB= sa
MKPIC= no
@ -42,7 +42,7 @@ SRCS+= bootp.c rarp.c bootparam.c
# boot filesystems
SRCS+= nfs.c tftp.c
.endif
SRCS+= ufs.c ufs_ls.c cd9660.c ustarfs.c
SRCS+= lfs.c ufs.c ufs_ls.c cd9660.c ustarfs.c
# only needed during build
libinstall::

813
sys/lib/libsa/lfs.c Normal file
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@ -0,0 +1,813 @@
/* $NetBSD: lfs.c,v 1.1 1999/08/18 20:04:40 cgd Exp $ */
/*-
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* The Mach Operating System project at Carnegie-Mellon University.
*
* 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 University of
* California, Berkeley and its contributors.
* 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.
*
*
* Copyright (c) 1990, 1991 Carnegie Mellon University
* All Rights Reserved.
*
* Author: David Golub
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
/*
* Stand-alone file reading package.
*/
#include <sys/param.h>
#include <sys/time.h>
#include <sys/mount.h> /* XXX for MNAMELEN */
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/dir.h>
#include <ufs/lfs/lfs.h>
#ifdef _STANDALONE
#include <lib/libkern/libkern.h>
#else
#include <string.h>
inline u_int
max(a, b)
u_int a, b;
{
return (a > b ? a : b);
}
#endif
#include "stand.h"
#include "lfs.h"
#if defined(LIBSA_FS_SINGLECOMPONENT) && !defined(LIBSA_NO_FS_SYMLINK)
#define LIBSA_NO_FS_SYMLINK
#endif
/*
* In-core LFS superblock. This exists only to placate the macros in lfs.h,
* and to diff easily against the UFS code.
*/
struct fs {
struct dlfs lfs_dlfs;
};
#define fs_magic lfs_magic
#define fs_bsize lfs_bsize
#define fs_maxsymlinklen lfs_maxsymlinklen
#define FS_MAGIC LFS_MAGIC
#define SBSIZE LFS_SBPAD
#define SBLOCK (LFS_LABELPAD / DEV_BSIZE)
/*
* In-core open file.
*/
struct file {
off_t f_seekp; /* seek pointer */
struct fs *f_fs; /* pointer to super-block */
struct dinode f_di; /* copy of on-disk inode */
unsigned int f_nindir[NIADDR];
/* number of blocks mapped by
indirect block at level i */
char *f_blk[NIADDR]; /* buffer for indirect block at
level i */
size_t f_blksize[NIADDR];
/* size of buffer */
daddr_t f_blkno[NIADDR];/* disk address of block in buffer */
char *f_buf; /* buffer for data block */
size_t f_buf_size; /* size of data block */
daddr_t f_buf_blkno; /* block number of data block */
};
static int find_inode_sector(ino_t inumber, struct open_file *f,
ufs_daddr_t *ibp);
static int find_inode(ino_t inumber, struct open_file *f);
static int read_inode __P((ino_t, struct open_file *));
static int block_map __P((struct open_file *, daddr_t, daddr_t *));
static int buf_read_file __P((struct open_file *, char **, size_t *));
static int search_directory __P((char *, struct open_file *, ino_t *));
/*
* Find an inode's block. Look it up in the ifile. Whee!
*/
static int
find_inode_sector(ino_t inumber, struct open_file *f, ufs_daddr_t *isp)
{
register struct file *fp = (struct file *)f->f_fsdata;
register struct fs *fs = fp->f_fs;
ufs_daddr_t ifileent_blkno;
char *ent_in_buf;
size_t buf_after_ent;
int rc;
rc = read_inode(fs->lfs_ifile, f);
if (rc)
return (rc);
ifileent_blkno =
(inumber / fs->lfs_ifpb) + fs->lfs_cleansz + fs->lfs_segtabsz;
fp->f_seekp = (off_t)ifileent_blkno * fs->fs_bsize +
(inumber % fs->lfs_ifpb) * sizeof (IFILE);
rc = buf_read_file(f, &ent_in_buf, &buf_after_ent);
if (rc)
return (rc);
/* make sure something's not badly wrong, but don't panic. */
if (buf_after_ent < sizeof (IFILE))
return (EINVAL);
#if 0 /* LFS daddr_t's are in sectors, fsbtodb() shouldn't be used on them */
*isp = fsbtodb(fs, ((IFILE *)ent_in_buf)->if_daddr);
#else
*isp = ((IFILE *)ent_in_buf)->if_daddr;
#endif
if (*isp == LFS_UNUSED_DADDR) /* again, something badly wrong */
return (EINVAL);
return (0);
}
/*
* Read a new inode into a file structure.
*/
static int
read_inode(inumber, f)
ino_t inumber;
struct open_file *f;
{
register struct file *fp = (struct file *)f->f_fsdata;
register struct fs *fs = fp->f_fs;
struct dinode *dip;
ufs_daddr_t inode_sector;
size_t rsize;
char *buf;
int rc, cnt;
if (inumber == fs->lfs_ifile)
inode_sector = fs->lfs_idaddr;
else if ((rc = find_inode_sector(inumber, f, &inode_sector)) != 0)
return (rc);
/*
* Read inode and save it.
*/
buf = alloc(fs->fs_bsize);
#if !defined(LIBSA_NO_TWIDDLE)
twiddle();
#endif
rc = DEV_STRATEGY(f->f_dev)(f->f_devdata, F_READ,
inode_sector, fs->fs_bsize,
buf, &rsize);
if (rc)
goto out;
if (rsize != fs->fs_bsize) {
rc = EIO;
goto out;
}
rc = EINVAL;
cnt = INOPB(fs);
for (dip = (struct dinode *)buf + (cnt - 1); cnt--; --dip) {
if (dip->di_inumber == inumber) {
rc = 0;
break;
}
}
/* kernel code panics, but boot blocks which panic are Bad. */
if (rc)
goto out;
fp->f_di = *dip;
/*
* Clear out the old buffers
*/
{
register int level;
for (level = 0; level < NIADDR; level++)
fp->f_blkno[level] = -1;
fp->f_buf_blkno = -1;
}
out:
free(buf, fs->fs_bsize);
return (rc);
}
/*
* Given an offset in a file, find the disk block number that
* contains that block.
*/
static int
block_map(f, file_block, disk_block_p)
struct open_file *f;
daddr_t file_block;
daddr_t *disk_block_p; /* out */
{
register struct file *fp = (struct file *)f->f_fsdata;
register struct fs *fs = fp->f_fs;
int level;
int idx;
daddr_t ind_block_num;
daddr_t *ind_p;
int rc;
/*
* Index structure of an inode:
*
* di_db[0..NDADDR-1] hold block numbers for blocks
* 0..NDADDR-1
*
* di_ib[0] index block 0 is the single indirect block
* holds block numbers for blocks
* NDADDR .. NDADDR + NINDIR(fs)-1
*
* di_ib[1] index block 1 is the double indirect block
* holds block numbers for INDEX blocks for blocks
* NDADDR + NINDIR(fs) ..
* NDADDR + NINDIR(fs) + NINDIR(fs)**2 - 1
*
* di_ib[2] index block 2 is the triple indirect block
* holds block numbers for double-indirect
* blocks for blocks
* NDADDR + NINDIR(fs) + NINDIR(fs)**2 ..
* NDADDR + NINDIR(fs) + NINDIR(fs)**2
* + NINDIR(fs)**3 - 1
*/
if (file_block < NDADDR) {
/* Direct block. */
*disk_block_p = fp->f_di.di_db[file_block];
return (0);
}
file_block -= NDADDR;
/*
* nindir[0] = NINDIR
* nindir[1] = NINDIR**2
* nindir[2] = NINDIR**3
* etc
*/
for (level = 0; level < NIADDR; level++) {
if (file_block < fp->f_nindir[level])
break;
file_block -= fp->f_nindir[level];
}
if (level == NIADDR) {
/* Block number too high */
return (EFBIG);
}
ind_block_num = fp->f_di.di_ib[level];
for (; level >= 0; level--) {
if (ind_block_num == 0) {
*disk_block_p = 0; /* missing */
return (0);
}
if (fp->f_blkno[level] != ind_block_num) {
if (fp->f_blk[level] == (char *)0)
fp->f_blk[level] =
alloc(fs->fs_bsize);
#if !defined(LIBSA_NO_TWIDDLE)
twiddle();
#endif
rc = DEV_STRATEGY(f->f_dev)(f->f_devdata, F_READ,
#if 0 /* LFS daddr_t's are in sectors, fsbtodb() shouldn't be used on them */
fsbtodb(fp->f_fs, ind_block_num),
#else
ind_block_num,
#endif
fs->fs_bsize,
fp->f_blk[level],
&fp->f_blksize[level]);
if (rc)
return (rc);
if (fp->f_blksize[level] != fs->fs_bsize)
return (EIO);
fp->f_blkno[level] = ind_block_num;
}
ind_p = (daddr_t *)fp->f_blk[level];
if (level > 0) {
idx = file_block / fp->f_nindir[level - 1];
file_block %= fp->f_nindir[level - 1];
} else
idx = file_block;
ind_block_num = ind_p[idx];
}
*disk_block_p = ind_block_num;
return (0);
}
/*
* Read a portion of a file into an internal buffer. Return
* the location in the buffer and the amount in the buffer.
*/
static int
buf_read_file(f, buf_p, size_p)
struct open_file *f;
char **buf_p; /* out */
size_t *size_p; /* out */
{
register struct file *fp = (struct file *)f->f_fsdata;
register struct fs *fs = fp->f_fs;
long off;
register daddr_t file_block;
daddr_t disk_block;
size_t block_size;
int rc;
off = blkoff(fs, fp->f_seekp);
file_block = lblkno(fs, fp->f_seekp);
block_size = dblksize(fs, &fp->f_di, file_block);
if (file_block != fp->f_buf_blkno) {
rc = block_map(f, file_block, &disk_block);
if (rc)
return (rc);
if (fp->f_buf == (char *)0)
fp->f_buf = alloc(fs->fs_bsize);
if (disk_block == 0) {
bzero(fp->f_buf, block_size);
fp->f_buf_size = block_size;
} else {
#if !defined(LIBSA_NO_TWIDDLE)
twiddle();
#endif
rc = DEV_STRATEGY(f->f_dev)(f->f_devdata, F_READ,
#if 0 /* LFS daddr_t's are in sectors, fsbtodb() shouldn't be used on them */
fsbtodb(fs, disk_block),
#else
disk_block,
#endif
block_size, fp->f_buf, &fp->f_buf_size);
if (rc)
return (rc);
}
fp->f_buf_blkno = file_block;
}
/*
* Return address of byte in buffer corresponding to
* offset, and size of remainder of buffer after that
* byte.
*/
*buf_p = fp->f_buf + off;
*size_p = block_size - off;
/*
* But truncate buffer at end of file.
*/
if (*size_p > fp->f_di.di_size - fp->f_seekp)
*size_p = fp->f_di.di_size - fp->f_seekp;
return (0);
}
/*
* Search a directory for a name and return its
* i_number.
*/
static int
search_directory(name, f, inumber_p)
char *name;
struct open_file *f;
ino_t *inumber_p; /* out */
{
register struct file *fp = (struct file *)f->f_fsdata;
register struct direct *dp;
struct direct *edp;
char *buf;
size_t buf_size;
int namlen, length;
int rc;
length = strlen(name);
fp->f_seekp = 0;
while (fp->f_seekp < fp->f_di.di_size) {
rc = buf_read_file(f, &buf, &buf_size);
if (rc)
return (rc);
dp = (struct direct *)buf;
edp = (struct direct *)(buf + buf_size);
while (dp < edp) {
if (dp->d_ino == (ino_t)0)
goto next;
#if BYTE_ORDER == LITTLE_ENDIAN
if (fp->f_fs->fs_maxsymlinklen <= 0)
namlen = dp->d_type;
else
#endif
namlen = dp->d_namlen;
if (namlen == length &&
!strcmp(name, dp->d_name)) {
/* found entry */
*inumber_p = dp->d_ino;
return (0);
}
next:
dp = (struct direct *)((char *)dp + dp->d_reclen);
}
fp->f_seekp += buf_size;
}
return (ENOENT);
}
/*
* Open a file.
*/
int
lfs_open(path, f)
char *path;
struct open_file *f;
{
#ifndef LIBSA_FS_SINGLECOMPONENT
register char *cp, *ncp;
register int c;
#endif
ino_t inumber;
struct file *fp;
struct fs *fs;
int rc;
size_t buf_size;
#ifndef LIBSA_NO_FS_SYMLINK
ino_t parent_inumber;
int nlinks = 0;
char namebuf[MAXPATHLEN+1];
char *buf = NULL;
#endif
/* allocate file system specific data structure */
fp = alloc(sizeof(struct file));
bzero(fp, sizeof(struct file));
f->f_fsdata = (void *)fp;
/* allocate space and read super block */
fs = alloc(SBSIZE);
fp->f_fs = fs;
#if !defined(LIBSA_NO_TWIDDLE)
twiddle();
#endif
rc = DEV_STRATEGY(f->f_dev)(f->f_devdata, F_READ,
SBLOCK, SBSIZE, (char *)fs, &buf_size);
if (rc)
goto out;
if (buf_size != SBSIZE || fs->fs_magic != FS_MAGIC ||
fs->fs_bsize > MAXBSIZE || fs->fs_bsize < sizeof(struct fs)) {
rc = EINVAL;
goto out;
}
/*
* Calculate indirect block levels.
*/
{
register int mult;
register int level;
mult = 1;
for (level = 0; level < NIADDR; level++) {
mult *= NINDIR(fs);
fp->f_nindir[level] = mult;
}
}
inumber = ROOTINO;
if ((rc = read_inode(inumber, f)) != 0)
goto out;
#ifndef LIBSA_FS_SINGLECOMPONENT
cp = path;
while (*cp) {
/*
* Remove extra separators
*/
while (*cp == '/')
cp++;
if (*cp == '\0')
break;
/*
* Check that current node is a directory.
*/
if ((fp->f_di.di_mode & IFMT) != IFDIR) {
rc = ENOTDIR;
goto out;
}
/*
* Get next component of path name.
*/
{
register int len = 0;
ncp = cp;
while ((c = *cp) != '\0' && c != '/') {
if (++len > MAXNAMLEN) {
rc = ENOENT;
goto out;
}
cp++;
}
*cp = '\0';
}
/*
* Look up component in current directory.
* Save directory inumber in case we find a
* symbolic link.
*/
#ifndef LIBSA_NO_FS_SYMLINK
parent_inumber = inumber;
#endif
rc = search_directory(ncp, f, &inumber);
*cp = c;
if (rc)
goto out;
/*
* Open next component.
*/
if ((rc = read_inode(inumber, f)) != 0)
goto out;
#ifndef LIBSA_NO_FS_SYMLINK
/*
* Check for symbolic link.
*/
if ((fp->f_di.di_mode & IFMT) == IFLNK) {
int link_len = fp->f_di.di_size;
int len;
len = strlen(cp);
if (link_len + len > MAXPATHLEN ||
++nlinks > MAXSYMLINKS) {
rc = ENOENT;
goto out;
}
bcopy(cp, &namebuf[link_len], len + 1);
if (link_len < fs->fs_maxsymlinklen) {
bcopy(fp->f_di.di_shortlink, namebuf,
(unsigned) link_len);
} else {
/*
* Read file for symbolic link
*/
size_t buf_size;
daddr_t disk_block;
register struct fs *fs = fp->f_fs;
if (!buf)
buf = alloc(fs->fs_bsize);
rc = block_map(f, (daddr_t)0, &disk_block);
if (rc)
goto out;
#if !defined(LIBSA_NO_TWIDDLE)
twiddle();
#endif
rc = DEV_STRATEGY(f->f_dev)(f->f_devdata,
#if 0 /* LFS daddr_t's are in sectors, fsbtodb() shouldn't be used on them */
F_READ, fsbtodb(fs, disk_block),
#else
F_READ, disk_block,
#endif
fs->fs_bsize, buf, &buf_size);
if (rc)
goto out;
bcopy((char *)buf, namebuf, (unsigned)link_len);
}
/*
* If relative pathname, restart at parent directory.
* If absolute pathname, restart at root.
*/
cp = namebuf;
if (*cp != '/')
inumber = parent_inumber;
else
inumber = (ino_t)ROOTINO;
if ((rc = read_inode(inumber, f)) != 0)
goto out;
}
#endif /* !LIBSA_NO_FS_SYMLINK */
}
/*
* Found terminal component.
*/
rc = 0;
#else /* !LIBSA_FS_SINGLECOMPONENT */
/* look up component in the current (root) directory */
rc = search_directory(path, f, &inumber);
if (rc)
goto out;
/* open it */
rc = read_inode(inumber, f);
#endif /* !LIBSA_FS_SINGLECOMPONENT */
fp->f_seekp = 0; /* reset seek pointer */
out:
#ifndef LIBSA_NO_FS_SYMLINK
if (buf)
free(buf, fs->fs_bsize);
#endif
if (rc) {
if (fp->f_buf)
free(fp->f_buf, fp->f_fs->fs_bsize);
free(fp->f_fs, SBSIZE);
free(fp, sizeof(struct file));
}
return (rc);
}
#ifndef LIBSA_NO_FS_CLOSE
int
lfs_close(f)
struct open_file *f;
{
register struct file *fp = (struct file *)f->f_fsdata;
int level;
f->f_fsdata = (void *)0;
if (fp == (struct file *)0)
return (0);
for (level = 0; level < NIADDR; level++) {
if (fp->f_blk[level])
free(fp->f_blk[level], fp->f_fs->fs_bsize);
}
if (fp->f_buf)
free(fp->f_buf, fp->f_fs->fs_bsize);
free(fp->f_fs, SBSIZE);
free(fp, sizeof(struct file));
return (0);
}
#endif /* !LIBSA_NO_FS_CLOSE */
/*
* Copy a portion of a file into kernel memory.
* Cross block boundaries when necessary.
*/
int
lfs_read(f, start, size, resid)
struct open_file *f;
void *start;
size_t size;
size_t *resid; /* out */
{
register struct file *fp = (struct file *)f->f_fsdata;
register size_t csize;
char *buf;
size_t buf_size;
int rc = 0;
register char *addr = start;
while (size != 0) {
if (fp->f_seekp >= fp->f_di.di_size)
break;
rc = buf_read_file(f, &buf, &buf_size);
if (rc)
break;
csize = size;
if (csize > buf_size)
csize = buf_size;
bcopy(buf, addr, csize);
fp->f_seekp += csize;
addr += csize;
size -= csize;
}
if (resid)
*resid = size;
return (rc);
}
/*
* Not implemented.
*/
#ifndef LIBSA_NO_FS_WRITE
int
lfs_write(f, start, size, resid)
struct open_file *f;
void *start;
size_t size;
size_t *resid; /* out */
{
return (EROFS);
}
#endif /* !LIBSA_NO_FS_WRITE */
#ifndef LIBSA_NO_FS_SEEK
off_t
lfs_seek(f, offset, where)
struct open_file *f;
off_t offset;
int where;
{
register struct file *fp = (struct file *)f->f_fsdata;
switch (where) {
case SEEK_SET:
fp->f_seekp = offset;
break;
case SEEK_CUR:
fp->f_seekp += offset;
break;
case SEEK_END:
fp->f_seekp = fp->f_di.di_size - offset;
break;
default:
return (-1);
}
return (fp->f_seekp);
}
#endif /* !LIBSA_NO_FS_SEEK */
int
lfs_stat(f, sb)
struct open_file *f;
struct stat *sb;
{
register struct file *fp = (struct file *)f->f_fsdata;
/* only important stuff */
sb->st_mode = fp->f_di.di_mode;
sb->st_uid = fp->f_di.di_uid;
sb->st_gid = fp->f_di.di_gid;
sb->st_size = fp->f_di.di_size;
return (0);
}

45
sys/lib/libsa/lfs.h Normal file
View File

@ -0,0 +1,45 @@
/* $NetBSD: lfs.h,v 1.1 1999/08/18 20:04:40 cgd Exp $ */
/*-
* Copyright (c) 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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.
*
* @(#)ufs.h 8.1 (Berkeley) 6/11/93
*/
int lfs_open __P((char *path, struct open_file *f));
int lfs_close __P((struct open_file *f));
int lfs_read __P((struct open_file *f, void *buf,
size_t size, size_t *resid));
int lfs_write __P((struct open_file *f, void *buf,
size_t size, size_t *resid));
off_t lfs_seek __P((struct open_file *f, off_t offset, int where));
int lfs_stat __P((struct open_file *f, struct stat *sb));