From 466183d6773b2bcc61dd6d6970be2658ceebe046 Mon Sep 17 00:00:00 2001
From: Dietmar Maurer <dietmar@proxmox.com>
Date: Mon, 23 Mar 2015 12:50:13 +0100
Subject: [PATCH] DRBDPlugin: hack - wait until device is acessible

---
 PVE/Storage/DRBDPlugin.pm | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/PVE/Storage/DRBDPlugin.pm b/PVE/Storage/DRBDPlugin.pm
index dbeff45..ddc86f6 100644
--- a/PVE/Storage/DRBDPlugin.pm
+++ b/PVE/Storage/DRBDPlugin.pm
@@ -292,7 +292,19 @@ sub activate_volume {
     # create diskless assignment
     ($rc, $res) = $hdl->assign($nodename, $volname, { diskless => 'true' });
     check_drbd_rc($rc->[0]);
-				  
+
+    # fixme: wait until device is acessible - looks strange to me ?
+
+    my $print_warning = 1;
+    my $max_wait_time = 20;
+    for (my $i = 0;; $i++) {
+	last if system("dd if=$path of=/dev/null bs=512 count=1 >/dev/null 2>&1") == 0;
+	die "aborting wait - device '$path' still not readable\n" if $i > $max_wait_time;
+	print "waiting for device '$path' to become ready...\n" if $print_warning;
+	$print_warning = 0;
+	sleep(1);
+    }
+         
     return undef;    
 }