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/*
Copyright (C) 1993,94,95,96,98,99,2001 Free Software Foundation, Inc.
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 "priv.h"
#include <errno.h>
#include <sys/stat.h>
#include <hurd/fsys.h>
#include <hurd/fshelp.h>
#include <cthreads.h>
/* Shutdown the filesystem; flags are as for fsys_goaway. */
error_t
netfs_shutdown (int flags)
{
error_t
helper (struct node *node)
{
error_t err;
mach_port_t control;
err = fshelp_fetch_control (&node->transbox, &control);
if (!err && (control != MACH_PORT_NULL))
{
mutex_unlock (&node->lock);
err = fsys_goaway (control, flags);
mach_port_deallocate (mach_task_self (), control);
mutex_lock (&node->lock);
}
else
err = 0;
if ((err == MIG_SERVER_DIED) || (err == MACH_SEND_INVALID_DEST))
err = 0;
return err;
}
int nports;
int err;
if ((flags & FSYS_GOAWAY_UNLINK)
&& S_ISDIR (netfs_root_node->nn_stat.st_mode))
return EBUSY;
#ifdef NOTYET
if (flags & FSYS_GOAWAY_RECURSE)
{
err = netfs_node_iterate (helper);
if (err)
return err;
}
#endif
#ifdef NOTYET
rwlock_writer_lock (&netfs_fsys_lock);
#endif
/* Permit all current RPC's to finish, and then suspend any new ones. */
err = ports_inhibit_class_rpcs (netfs_protid_class);
if (err)
{
#ifdef NOTYET
rwlock_writer_unlock (&netfs_fsys_lock);
#endif
return err;
}
nports = ports_count_class (netfs_protid_class);
if (((flags & FSYS_GOAWAY_FORCE) == 0) && nports)
/* There are outstanding user ports; resume operations. */
{
ports_enable_class (netfs_protid_class);
ports_resume_class_rpcs (netfs_protid_class);
#ifdef NOTYET
rwlock_writer_unlock (&netfs_fsys_lock);
#endif
return EBUSY;
}
if (!(flags & FSYS_GOAWAY_NOSYNC))
{
err = netfs_attempt_syncfs (0, flags);
if (err)
return err;
}
return 0;
}
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