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/* Device input and output
Copyright (C) 1992, 1993, 1994 Free Software Foundation
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
The GNU Hurd is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with the GNU Hurd; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Written by Michael I. Bushnell. */
#include "ufs.h"
#include <device/device.h>
#include <stdio.h>
#include <errno.h>
#include <assert.h>
/* Write disk block ADDR with DATA of LEN bytes, waiting for completion. */
error_t
dev_write_sync (daddr_t addr,
vm_address_t data,
long len)
{
int foo;
assert (!readonly);
if (device_write (ufs_device, 0, addr, (io_buf_ptr_t) data, len, &foo)
|| foo != len)
return EIO;
return 0;
}
/* Write diskblock ADDR with DATA of LEN bytes; don't bother waiting
for completion. */
error_t
dev_write (daddr_t addr,
vm_address_t data,
long len)
{
int foo;
assert (!readonly);
if (device_write_request (ufs_device, MACH_PORT_NULL, 0, addr,
(io_buf_ptr_t) data, len, &foo)
|| foo != len)
return EIO;
return 0;
}
static int deverr;
/* Read disk block ADDR; put the address of the data in DATA; read LEN
bytes. Always *DATA should be a full page no matter what. */
error_t
dev_read_sync (daddr_t addr,
vm_address_t *data,
long len)
{
int foo;
deverr = device_read (ufs_device, 0, addr, len, (io_buf_ptr_t *)data,
(u_int *)&foo);
if (deverr || foo != len)
return EIO;
return 0;
}
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