polldaemon: Re-initialise lvmcache properly on fork (fixes RHBZ 1073670).

test/shell/pvmove-background.sh

@@ -0,0 +1,24 @@
+#!/bin/sh
+# Copyright (C) 2014 Red Hat, Inc. All rights reserved.
+#
+# This copyrighted material is made available to anyone wishing to use,
+# modify, copy, or redistribute it subject to the terms and conditions
+# of the GNU General Public License v.2.
+#
+# 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  02111-1307  USA
+
+# Check pvmove behavior when it's progress and machine is rebooted
+
+. lib/test
+
+aux prepare_vg 3
+
+lvcreate -l1 -n $lv1 $vg "$dev1"
+
+lvs -o +devices | grep $dev1
+pvmove -i 1 -b "$dev1" "$dev2"
+sleep 5 # arbitrary...
+lvs -o +devices | not grep "pvmove"
+lvs -o +devices | grep "$dev2"

tools/toollib.c

@@ -91,6 +91,7 @@ int become_daemon(struct cmd_context *cmd, int skip_lvm)
 	strncpy(*cmd->argv, "(lvm2)", strlen(*cmd->argv));
 
 	if (!skip_lvm) {
+		lvmcache_destroy(cmd, 1);
 		reset_locking();
 		if (!lvmcache_init())
 			/* FIXME Clean up properly here */