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/*
Copyright (C) 2009 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. */
/* This manages the master ports obtained when opening the libmachdev-based
translator node. */
#include <stdio.h>
#include <fcntl.h>
#include <error.h>
#include <hurd/ports.h>
#include <hurd/trivfs.h>
#include <hurd.h>
#include "device_S.h"
#include "notify_S.h"
static struct port_bucket *port_bucket;
/* Trivfs hooks. */
int trivfs_fstype = FSTYPE_MISC;
int trivfs_fsid = 0;
int trivfs_support_read = 0;
int trivfs_support_write = 0;
int trivfs_support_exec = 0;
int trivfs_allow_open = O_READ | O_WRITE;
/* Our port classes. */
struct port_class *trivfs_protid_class;
struct port_class *trivfs_cntl_class;
/* Implementation of notify interface */
kern_return_t
do_mach_notify_port_deleted (struct port_info *pi,
mach_port_t name)
{
return EOPNOTSUPP;
}
kern_return_t
do_mach_notify_msg_accepted (struct port_info *pi,
mach_port_t name)
{
return EOPNOTSUPP;
}
kern_return_t
do_mach_notify_port_destroyed (struct port_info *pi,
mach_port_t port)
{
return EOPNOTSUPP;
}
kern_return_t
do_mach_notify_no_senders (struct port_info *pi,
mach_port_mscount_t mscount)
{
return ports_do_mach_notify_no_senders (pi, mscount);
}
kern_return_t
do_mach_notify_send_once (struct port_info *pi)
{
return EOPNOTSUPP;
}
kern_return_t
do_mach_notify_dead_name (struct port_info *pi,
mach_port_t name)
{
return EOPNOTSUPP;
}
boolean_t
machdev_is_master_device (mach_port_t port)
{
struct port_info *pi = ports_lookup_port (port_bucket, port,
trivfs_protid_class);
if (pi == NULL)
return FALSE;
ports_port_deref (pi);
return TRUE;
}
error_t
trivfs_append_args (struct trivfs_control *fsys, char **argz, size_t *argz_len)
{
error_t err = 0;
#define ADD_OPT(fmt, args...) \
do { char buf[100]; \
if (! err) { \
snprintf (buf, sizeof buf, fmt , ##args); \
err = argz_add (argz, argz_len, buf); } } while (0)
#undef ADD_OPT
return err;
}
int machdev_trivfs_init()
{
port_bucket = ports_create_bucket ();
trivfs_cntl_class = ports_create_class (trivfs_clean_cntl, 0);
trivfs_protid_class = ports_create_class (trivfs_clean_protid, 0);
return 0;
}
error_t
trivfs_goaway (struct trivfs_control *fsys, int flags)
{
int count;
/* Stop new requests. */
ports_inhibit_class_rpcs (trivfs_cntl_class);
ports_inhibit_class_rpcs (trivfs_protid_class);
count = ports_count_class (trivfs_protid_class);
if (count && !(flags & FSYS_GOAWAY_FORCE))
{
/* We won't go away, so start things going again... */
ports_enable_class (trivfs_protid_class);
ports_resume_class_rpcs (trivfs_cntl_class);
ports_resume_class_rpcs (trivfs_protid_class);
return EBUSY;
}
exit (0);
}
static int
demuxer (mach_msg_header_t *inp, mach_msg_header_t *outp)
{
mig_routine_t routine;
if ((routine = device_server_routine (inp)) ||
(routine = notify_server_routine (inp)) ||
(routine = NULL, trivfs_demuxer (inp, outp)))
{
if (routine)
(*routine) (inp, outp);
return TRUE;
}
else
return FALSE;
}
void
trivfs_modify_stat (struct trivfs_protid *cred, io_statbuf_t *stat)
{
}
void machdev_trivfs_server()
{
mach_port_t bootstrap;
struct trivfs_control *fsys;
int err;
task_get_bootstrap_port (mach_task_self (), &bootstrap);
if (bootstrap == MACH_PORT_NULL)
error (1, 0, "must be started as a translator");
/* Reply to our parent. */
err = trivfs_startup (bootstrap, 0,
trivfs_cntl_class, port_bucket,
trivfs_protid_class, port_bucket, &fsys);
mach_port_deallocate (mach_task_self (), bootstrap);
if (err)
error (1, err, "Contacting parent");
/* Launch. */
do
{
ports_manage_port_operations_one_thread (port_bucket, demuxer, 0);
} while (trivfs_goaway (fsys, 0));
}
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