[pve-devel] [PATCH] Add qga freeze in vzdump in snapshot mode

[Wolfgang Link]

it will freeze the filesystem to provide consistents.

Signed-off-by: Wolfgang Link <wolfgang at linksystems.org>
---
 PVE/VZDump/QemuServer.pm |   19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/PVE/VZDump/QemuServer.pm b/PVE/VZDump/QemuServer.pm
index fd36c69..2c62de3 100644
--- a/PVE/VZDump/QemuServer.pm
+++ b/PVE/VZDump/QemuServer.pm
@@ -286,8 +286,8 @@ sub archive {
     my $resume_on_backup;
 
     my $skiplock = 1;
-
-    if (!PVE::QemuServer::check_running($vmid)) {
+    my $vm_is_running = PVE::QemuServer::check_running($vmid);
+    if (!$vm_is_running) {
 	eval {
 	    $self->loginfo("starting kvm to execute backup task");
 	    PVE::QemuServer::vm_start($self->{storecfg}, $vmid, undef, 
@@ -380,8 +380,23 @@ sub archive {
 
 	$qmpclient->queue_cmd($vmid, $add_fd_cb, 'getfd', 
 			      fd => $outfileno, fdname => "backup");
+	  
+	my $freeze_fs = 0; 
+
+	if ( $self->{vmlist}->{$vmid}->{agent} == 1 && $vm_is_running ){
+	    $freeze_fs = PVE::QemuServer::vm_mon_cmd($vmid,"guest-fsfreeze-freeze");  
+	    $self->loginfo("Can't freeze fs!")if ( defined($freeze_fs) &&  $freeze_fs == 0 );
+	}
+	
 	$qmpclient->queue_execute();
 
+	my $thaw_fs = 0; 
+	$thaw_fs= PVE::QemuServer::vm_mon_cmd($vmid,"guest-fsfreeze-thaw") 
+	    if ( $freeze_fs > 0 );
+
+	$self->loginfo("Error by trying thaw fs, you must unlock manually")
+	    if ( $freeze_fs > 0 && 0 != $freeze_fs - $thaw_fs );
+
 	die $qmpclient->{errors}->{$vmid} if $qmpclient->{errors}->{$vmid};    
 
 	if ($cpid) {
-- 
1.7.10.4