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/* Contact parent filesystem and establish ourselves as the translator.
Copyright (C) 1995 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
This program 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.
This program 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <hurd.h>
#include <hurd/fsys.h>
#include <assert.h>
#include "priv.h"
/* Creates a control port for this filesystem and sends it to BOOTSTRAP with
fsys_startup. CONTROL_TYPE is the ports library type for the control
port, and PROTID_TYPE is the type for ports representing opens of this
node. If CONTROL isn't NULL, the trivfs control port is return in it. If
any error occurs sending fsys_startup, it is returned, otherwise 0. */
error_t
trivfs_startup(mach_port_t bootstrap,
struct port_class *control_class,
struct port_bucket *control_bucket,
struct port_class *protid_class,
struct port_bucket *protid_bucket,
struct trivfs_control **control)
{
error_t err;
mach_port_t realnode;
struct trivfs_control *tcntl;
mach_port_t mcntl =
trivfs_handle_port (MACH_PORT_NULL, control_class, control_bucket,
protid_class, protid_bucket);
assert(mcntl != MACH_PORT_NULL);
/* Contact whoever started us. */
err = fsys_startup (bootstrap, mcntl, MACH_MSG_TYPE_MAKE_SEND, &realnode);
/* Install the returned realnode for trivfs's use */
tcntl = ports_lookup_port (control_bucket, mcntl, control_class);
assert (tcntl);
if (!err)
tcntl->underlying = realnode;
ports_port_deref (tcntl);
if (control)
*control = tcntl;
return err;
}
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