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/*
* Copyright (c) 1994 The University of Utah and
* the Computer Systems Laboratory at the University of Utah (CSL).
* All rights reserved.
*
* Permission to use, copy, modify and distribute this software is hereby
* granted provided that (1) source code retains these copyright, permission,
* and disclaimer notices, and (2) redistributions including binaries
* reproduce the notices in supporting documentation, and (3) all advertising
* materials mentioning features or use of this software display the following
* acknowledgement: ``This product includes software developed by the
* Computer Systems Laboratory at the University of Utah.''
*
* THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
* IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
* ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* CSL requests users of this software to return to csl-dist@cs.utah.edu any
* improvements that they make and grant CSL redistribution rights.
*
* Author: Bryan Ford, University of Utah CSL
* MINIX FS patches: Csizmazia Balazs, University ELTE, Hungary
*/
/* This is just an icky kludgy "VFS layer" (harhar) for ffs and ext2 and minix. */
#include "file_io.h"
int
open_file(master_device_port, path, fp)
mach_port_t master_device_port;
char * path;
struct file *fp;
{
int rc;
if ((rc = ext2_open_file(master_device_port, path, fp))
!= FS_INVALID_FS)
{
if (rc == 0)
fp->f_fstype = EXT2_FS;
return rc;
}
if ( (rc = minix_open_file(master_device_port, path, fp))
!= FS_INVALID_FS )
{
if (rc == 0)
fp->f_fstype = MINIX_FS;
return rc;
}
fp->f_fstype = BSD_FFS;
return ffs_open_file(master_device_port, path, fp);
}
void
close_file(fp)
register struct file *fp;
{
switch (fp->f_fstype) {
case EXT2_FS:
ext2_close_file(fp);
return;
case MINIX_FS:
minix_close_file(fp);
return;
default:
ffs_close_file(fp);
return;
}
}
int
read_file(fp, offset, start, size, resid)
register struct file *fp;
vm_offset_t offset;
vm_offset_t start;
vm_size_t size;
vm_size_t *resid; /* out */
{
switch (fp->f_fstype) {
case EXT2_FS:
return ext2_read_file(fp, offset, start, size, resid);
case MINIX_FS:
return minix_read_file(fp, offset, start, size, resid);
default:
return ffs_read_file(fp, offset, start, size, resid);
}
}
int
file_is_directory(struct file *f)
{
switch (f->f_fstype) {
case EXT2_FS:
return ext2_file_is_directory(f);
case MINIX_FS:
return minix_file_is_directory(f);
default:
return ffs_file_is_directory(f);
}
}
int
file_is_regular(struct file *f)
{
switch (f->f_fstype) {
case EXT2_FS:
return ext2_file_is_regular(f);
case MINIX_FS:
return minix_file_is_regular(f);
default:
return ffs_file_is_regular(f);
}
}
int
open_file_direct(dev, fdp, is_structured)
mach_port_t dev;
register struct file_direct *fdp;
boolean_t is_structured;
{
int rc;
if ((rc = ext2_open_file_direct(dev, fdp, is_structured))
!= FS_INVALID_FS)
{
if (rc == 0)
fdp->f_fstype = EXT2_FS;
return rc;
}
if ( (rc = minix_open_file_direct(dev, fdp, is_structured) )
!= FS_INVALID_FS )
{
if (rc == 0)
fdp->f_fstype = MINIX_FS;
return rc;
}
fdp->f_fstype = BSD_FFS;
return ffs_open_file_direct(dev, fdp, is_structured);
}
int
add_file_direct(fdp, fp)
register struct file_direct *fdp;
register struct file *fp;
{
switch (fp->f_fstype) {
case EXT2_FS:
return ext2_add_file_direct(fdp, fp);
case MINIX_FS:
return minix_add_file_direct(fdp, fp);
default:
return ffs_add_file_direct(fdp, fp);
}
}
int
page_read_file_direct(fdp, offset, size, addr, size_read)
register struct file_direct *fdp;
vm_offset_t offset;
vm_size_t size;
vm_offset_t *addr; /* out */
mach_msg_type_number_t *size_read; /* out */
{
switch (fdp->f_fstype) {
case EXT2_FS:
return ext2_page_read_file_direct(fdp, offset, size, addr, size_read);
case MINIX_FS:
return minix_page_read_file_direct(fdp, offset, size, addr, size_read);
default:
return ffs_page_read_file_direct(fdp, offset, size, addr, size_read);
}
}
int
page_write_file_direct(fdp, offset, addr, size, size_written)
register struct file_direct *fdp;
vm_offset_t offset;
vm_offset_t addr;
vm_size_t size;
vm_offset_t *size_written; /* out */
{
switch (fdp->f_fstype) {
case EXT2_FS:
return ext2_page_write_file_direct(fdp, offset, addr, size, size_written);
case MINIX_FS:
return minix_page_write_file_direct(fdp, offset, addr, size, size_written);
default:
return ffs_page_write_file_direct(fdp, offset, addr, size, size_written);
}
}
int
remove_file_direct(fdp)
struct file_direct *fdp;
{
switch (fdp->f_fstype) {
case EXT2_FS:
return ext2_remove_file_direct(fdp);
case MINIX_FS:
return minix_remove_file_direct(fdp);
default:
return ffs_remove_file_direct(fdp);
}
}
/*
* some other stuff, that was previously defined as macro
*/
int
file_is_structured(fp)
register struct file *fp;
{
switch (fp->f_fstype) {
case EXT2_FS:
return (fp)->u.ext2.ext2_fs != 0;
case MINIX_FS:
return (fp)->u.minix.minix_fs != 0;
default:
return (fp)->u.ffs.ffs_fs != 0;
}
}
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