[pve-devel] [PATCH container 4/5] run_with_loopdev: reuse existing loopdevs

[Wolfgang Bumiller]

This will avoid triggering the MMP when mounting a
container locally outside lxc.
---
 src/PVE/LXC.pm | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/PVE/LXC.pm b/src/PVE/LXC.pm
index a823062..1ed3680 100644
--- a/src/PVE/LXC.pm
+++ b/src/PVE/LXC.pm
@@ -2488,7 +2488,15 @@ sub query_loopdev {
 # Returns the loop device.
 sub run_with_loopdev {
     my ($func, $file) = @_;
-    my $device;
+    my $device = query_loopdev($file);
+    # Try to reuse an existing device
+    if ($device) {
+	# We assume that whoever setup the loop device is responsible for
+	# detaching it.
+	&$func($device);
+	return $device;
+    }
+
     my $parser = sub {
 	my $line = shift;
 	if ($line =~ m@^(/dev/loop\d+)$@) {
-- 
2.1.4