2001-03-31 Neal H Walfield <neal@cs.uml.edu>

        * fsys-goaway.c (netfs_S_fsys_goaway): Actually implement it.
        * shutdown.c (netfs_attempt_shutdown): Likewise.

2 files changed, 149 insertions, 18 deletions

diff --git a/libnetfs/fsys-goaway.c b/libnetfs/fsys-goaway.c
new file mode 100644
index 00000000..6ac555d5
--- /dev/null
+++ b/libnetfs/fsys-goaway.c
@@ -0,0 +1,53 @@
+/* implement the fsys_goaway RPC for libnetfs
+   Copyright (C) 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 this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA. */
+
+#include "priv.h"
+#include "netfs.h"
+#include "fsys_S.h"
+#include "fsys_reply_U.h"
+
+#include <stdlib.h>
+#include <errno.h>
+#include <hurd/ports.h>
+
+error_t
+netfs_S_fsys_goaway (fsys_t control,
+		     mach_port_t reply,
+		     mach_msg_type_name_t reply_type,
+		     int flags)
+{
+  error_t err;
+  struct port_info *pt;
+
+  pt = ports_lookup_port (netfs_port_bucket, control,
+			  netfs_control_class);
+  if (! pt)
+    return EOPNOTSUPP;
+
+  err = netfs_shutdown (flags);
+  if (! err)
+    {
+      fsys_goaway_reply (reply, reply_type, 0);
+      exit (0);
+    }
+
+  ports_port_deref (pt);
+
+  return err;
+}
diff --git a/libnetfs/shutdown.c b/libnetfs/shutdown.c
index 8e4c7a68..9ba137d0 100644
--- a/libnetfs/shutdown.c
+++ b/libnetfs/shutdown.c
@@ -1,28 +1,106 @@
-/* 
-   Copyright (C) 1996 Free Software Foundation, Inc.
-   Written by Michael I. Bushnell, p/BSG.
+/*
+   Copyright (C) 1993,94,95,96,98,99,2001 Free Software Foundation, Inc.
 
-   This file is part of the GNU Hurd.
+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 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.
+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. */
+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 "netfs.h"
+/* 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)
 {
-  return EBUSY;
-}
+  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;
+}