/*
Copyright (C) 2008 Free Software Foundation, Inc.
Written by Zheng Da.
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. */
#include <fcntl.h>
#include <mach.h>
#include <hurd.h>
#include <hurd/ports.h>
#include <hurd/netfs.h>
#include <device/device.h>
#include "ethernet.h"
#include "vdev.h"
#include "device_S.h"
#include "notify_S.h"
#include "bpf_impl.h"
#include "netfs_impl.h"
#include "util.h"
extern struct port_bucket *port_bucket;
extern struct port_class *vdev_portclass;
extern struct port_class *other_portclass;
extern struct port_info *notify_pi;
/* Implementation of device interface */
/*
* This function is currently running in the multithread environment,
* it should be protected by locks.
*/
kern_return_t
ds_device_open (mach_port_t master_port, mach_port_t reply_port,
mach_msg_type_name_t reply_portPoly,
dev_mode_t mode, dev_name_t name, mach_port_t *device,
mach_msg_type_name_t *devicetype)
{
struct vether_device *dev;
int openstat;
int right_mode = 1;
struct protid *pi = ports_lookup_port (netfs_port_bucket, master_port, 0);
if (pi == NULL)
return D_NO_SUCH_DEVICE;
/* If the virtual device hasn't been created yet,
* create it now. */
if (pi->po->np->nn->ln == NULL)
{
extern struct port_bucket *port_bucket;
extern struct port_class *vdev_portclass;
extern struct stat underlying_node_stat;
static int ino_count = 0;
/* Create a new light node (virtual device). */
struct lnode *ln = (struct lnode *) add_vdev (pi->po->np->nn->name,
sizeof (*ln),
vdev_portclass,
port_bucket);
if (ln == NULL)
{
ports_port_deref (pi);
return D_NO_MEMORY;
}
memset (&ln->st, 0, sizeof (ln->st));
ln->st.st_ino = ++ino_count;
ln->st.st_mode = S_IFCHR | (underlying_node_stat.st_mode & ~S_IFMT);
ln->st.st_ctime = ln->st.st_mtime = ln->st.st_atime = time (NULL);
fshelp_touch (&ln->st, TOUCH_ATIME|TOUCH_MTIME|TOUCH_CTIME,
multiplexer_maptime);
pi->po->np->nn->ln = ln;
}
dev = (struct vether_device *) pi->po->np->nn->ln;
/* check the mode */
openstat = pi->po->openstat;
if (mode & D_READ && !(openstat & O_READ))
right_mode = 0;
if (mode & D_WRITE && !(openstat & O_WRITE))
right_mode = 0;
ports_port_deref (pi);
if (dev)
{
if (!right_mode)
return EBADF;
*device = dev->dev_port;
*devicetype = MACH_MSG_TYPE_MAKE_SEND;
return 0;
}
return D_NO_SUCH_DEVICE;
}
kern_return_t
ds_device_close (struct vether_device *device)
{
return 0;
}
kern_return_t
ds_device_write (struct vether_device *vdev, mach_port_t reply_port,
mach_msg_type_name_t reply_type, dev_mode_t mode,
recnum_t recnum, io_buf_ptr_t data, size_t datalen,
int *bytes_written)
{
kern_return_t ret = 0;
if (vdev == NULL)
{
vm_deallocate (mach_task_self (), (vm_address_t) data, datalen);
return D_NO_SUCH_DEVICE;
}
/* The packet is forwarded to all virtual interfaces and
* the interface which the multiplexer connects to. */
broadcast_pack (data, datalen, vdev);
*bytes_written = datalen;
if(ether_port != MACH_PORT_NULL)
ret = device_write (ether_port, mode , recnum ,
data, datalen, bytes_written);
/* The data in device_write() is transmifered out of line,
* so the server-side function has to deallocate it. */
vm_deallocate (mach_task_self (), (vm_address_t) data, datalen);
return ret;
}
kern_return_t
ds_device_write_inband (struct vether_device *vdev, mach_port_t reply_port,
mach_msg_type_name_t reply_type, dev_mode_t mode,
recnum_t recnum, io_buf_ptr_inband_t data,
size_t datalen, int *bytes_written)
{
if (vdev == NULL)
return D_NO_SUCH_DEVICE;
return D_INVALID_OPERATION;
}
kern_return_t
ds_device_read (struct vether_device *vdev, mach_port_t reply_port,
mach_msg_type_name_t reply_type, dev_mode_t mode,
recnum_t recnum, int bytes_wanted,
io_buf_ptr_t *data, size_t *datalen)
{
if (vdev == NULL)
return D_NO_SUCH_DEVICE;
return D_INVALID_OPERATION;
}
kern_return_t
ds_device_read_inband (struct vether_device *vdev, mach_port_t reply_port,
mach_msg_type_name_t reply_type, dev_mode_t mode,
recnum_t recnum, int bytes_wanted,
io_buf_ptr_inband_t data, size_t *datalen)
{
if (vdev == NULL)
return D_NO_SUCH_DEVICE;
return D_INVALID_OPERATION;
}
kern_return_t
ds_device_map (struct vether_device *vdev, vm_prot_t prot, vm_offset_t offset,
vm_size_t size, memory_object_t *pager, int unmap)
{
if (vdev == NULL)
return D_NO_SUCH_DEVICE;
return D_INVALID_OPERATION;
}
kern_return_t
ds_device_set_status (struct vether_device *vdev, dev_flavor_t flavor,
dev_status_t status, size_t statuslen)
{
if (vdev == NULL)
return D_NO_SUCH_DEVICE;
return D_INVALID_OPERATION;
}
kern_return_t
ds_device_get_status (struct vether_device *vdev, dev_flavor_t flavor,
dev_status_t status, size_t *statuslen)
{
extern io_return_t dev_getstat (struct vether_device *, dev_flavor_t,
dev_status_t, natural_t *);
kern_return_t ret = 0;
if (vdev == NULL)
return D_NO_SUCH_DEVICE;
if(ether_port != MACH_PORT_NULL)
ret = device_get_status (ether_port, flavor, status, statuslen);
else
ret = dev_getstat (vdev, flavor, status, statuslen);
return ret;
}
kern_return_t
ds_device_set_filter (struct vether_device *vdev, mach_port_t receive_port,
int priority, filter_array_t filter, size_t filterlen)
{
mach_port_t tmp;
kern_return_t err;
if (vdev == NULL)
return D_NO_SUCH_DEVICE;
err = mach_port_request_notification (mach_task_self (), receive_port,
MACH_NOTIFY_DEAD_NAME, 0,
ports_get_right (notify_pi),
MACH_MSG_TYPE_MAKE_SEND_ONCE, &tmp);
if (err != KERN_SUCCESS)
goto out;
if (tmp != MACH_PORT_NULL)
mach_port_deallocate (mach_task_self (), tmp);
err = net_set_filter (&vdev->port_list, receive_port,
priority, filter, filterlen);
out:
return err;
}