libnetfs: handle dead-name notifications

Handle dead-name notifications the same way libdiskfs does. In fact,
dead-name.c is a verbatim copy with trivial modifications. It clears
np->sockaddr if the dead name notification was for that port.

* libnetfs/dead-name.c: New file.
* libnetfs/Makefile (OTHERSRCS): Add dead-name.c.

2 files changed, 46 insertions, 1 deletions

diff --git a/libnetfs/Makefile b/libnetfs/Makefile
index 13c9b53b..a9810d23 100644
--- a/libnetfs/Makefile
+++ b/libnetfs/Makefile
@@ -52,7 +52,7 @@ OTHERSRCS= drop-node.c init-init.c make-node.c make-peropen.c make-protid.c   \
 	init-startup.c startup-argp.c set-options.c append-args.c	      \
 	runtime-argp.c std-runtime-argp.c std-startup-argp.c		      \
 	append-std-options.c trans-callback.c set-get-trans.c		      \
-	nref.c nrele.c nput.c file-get-storage-info-default.c
+	nref.c nrele.c nput.c file-get-storage-info-default.c dead-name.c
 
 SRCS= $(OTHERSRCS) $(FSSRCS) $(IOSRCS) $(FSYSSRCS) $(IFSOCKSRCS)
 
diff --git a/libnetfs/dead-name.c b/libnetfs/dead-name.c
new file mode 100644
index 00000000..ff29cfe6
--- /dev/null
+++ b/libnetfs/dead-name.c
@@ -0,0 +1,45 @@
+/* Handle dead name notifications on ports
+   Copyright (C) 1996 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 "priv.h"
+
+void
+ports_dead_name (void *notify, mach_port_t dead_name)
+{
+  struct protid *pi = ports_lookup_port (netfs_port_bucket, dead_name,
+					 netfs_protid_class);
+  struct node *np;
+
+  if (pi)
+    {
+      np = pi->po->np;
+      pthread_mutex_lock (&np->lock);
+      if (dead_name == np->sockaddr)
+	{
+	  mach_port_deallocate (mach_task_self (), np->sockaddr);
+	  np->sockaddr = MACH_PORT_NULL;
+	  netfs_nput (np);
+	}
+      else
+	pthread_mutex_unlock (&np->lock);
+    }
+
+  ports_interrupt_notified_rpcs (notify, dead_name, MACH_NOTIFY_DEAD_NAME);
+}