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/*
Copyright (C) 1995 Free Software Foundation, Inc.
Written by Michael I. Bushnell, p/BSG.
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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include "netfs.h"
#include "io_S.h"
error_t __attribute__((weak))
netfs_S_io_map (struct protid *user,
mach_port_t *rdobj, mach_msg_type_name_t *rdobjtype,
mach_port_t *wrobj, mach_msg_type_name_t *wrobjtype)
{
int flags;
struct node *node;
if (!user)
return EOPNOTSUPP;
*wrobj = *rdobj = MACH_PORT_NULL;
node = user->po->np;
flags = user->po->openstat & (O_READ | O_WRITE);
pthread_mutex_lock (&node->lock);
switch (flags)
{
case O_READ | O_WRITE:
*wrobj = *rdobj = netfs_get_filemap (node, VM_PROT_READ |VM_PROT_WRITE);
if (*wrobj == MACH_PORT_NULL)
goto error;
mach_port_mod_refs (mach_task_self (), *rdobj, MACH_PORT_RIGHT_SEND, 1);
break;
case O_READ:
*rdobj = netfs_get_filemap (node, VM_PROT_READ);
if (*rdobj == MACH_PORT_NULL)
goto error;
break;
case O_WRITE:
*wrobj = netfs_get_filemap (node, VM_PROT_WRITE);
if (*wrobj == MACH_PORT_NULL)
goto error;
break;
}
pthread_mutex_unlock (&node->lock);
*rdobjtype = MACH_MSG_TYPE_MOVE_SEND;
*wrobjtype = MACH_MSG_TYPE_MOVE_SEND;
return 0;
error:
pthread_mutex_unlock (&node->lock);
return errno;
}
error_t __attribute__((weak))
netfs_S_io_map_cntl (struct protid *user,
mach_port_t *obj,
mach_msg_type_name_t *objtype)
{
return EOPNOTSUPP;
}
error_t __attribute__((weak))
netfs_S_io_get_conch (struct protid *user)
{
return EOPNOTSUPP;
}
error_t __attribute__((weak))
netfs_S_io_release_conch (struct protid *user)
{
return EOPNOTSUPP;
}
error_t __attribute__((weak))
netfs_S_io_eofnotify (struct protid *user)
{
return EOPNOTSUPP;
}
error_t __attribute__((weak))
netfs_S_io_prenotify (struct protid *user,
vm_offset_t start, vm_offset_t stop)
{
return EOPNOTSUPP;
}
error_t __attribute__((weak))
netfs_S_io_postnotify (struct protid *user,
vm_offset_t start, vm_offset_t stop)
{
return EOPNOTSUPP;
}
error_t __attribute__((weak))
netfs_S_io_readnotify (struct protid *user)
{
return EOPNOTSUPP;
}
error_t __attribute__((weak))
netfs_S_io_readsleep (struct protid *user)
{
return EOPNOTSUPP;
}
error_t __attribute__((weak))
netfs_S_io_sigio (struct protid *user)
{
return EOPNOTSUPP;
}
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