[PATCH pve-storage 3/5] add volume_underlay_resize

[Alexandre Derumier]

Allow to resize the underlay vm volume

Signed-off-by: Alexandre Derumier <alexandre.derumier at groupe-cyllene.com>
---
 src/PVE/Storage.pm                | 18 ++++++++++++++++++
 src/PVE/Storage/LVMQcow2Plugin.pm | 12 ++++++++++++
 src/PVE/Storage/Plugin.pm         |  7 +++++++
 3 files changed, 37 insertions(+)

diff --git a/src/PVE/Storage.pm b/src/PVE/Storage.pm
index 385150e..8e0f8f1 100755
--- a/src/PVE/Storage.pm
+++ b/src/PVE/Storage.pm
@@ -317,6 +317,24 @@ sub volume_resize {
     }
 }
 
+sub volume_underlay_resize {
+    my ($cfg, $volid, $size) = @_;
+
+    my $padding = (1024 - $size % 1024) % 1024;
+    $size = $size + $padding;
+
+    my ($storeid, $volname) = parse_volume_id($volid, 1);
+    if ($storeid) {
+	my $scfg = storage_config($cfg, $storeid);
+	my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
+	return $plugin->volume_underlay_resize($scfg, $storeid, $volname, $size);
+    } elsif ($volid =~ m|^(/.+)$| && -e $volid) {
+	die "resize file/device '$volid' is not possible\n";
+    } else {
+	die "unable to parse volume ID '$volid'\n";
+    }
+}
+
 sub volume_rollback_is_possible {
     my ($cfg, $volid, $snap, $blockers) = @_;
 
diff --git a/src/PVE/Storage/LVMQcow2Plugin.pm b/src/PVE/Storage/LVMQcow2Plugin.pm
index 2a56c46..3b98eeb 100644
--- a/src/PVE/Storage/LVMQcow2Plugin.pm
+++ b/src/PVE/Storage/LVMQcow2Plugin.pm
@@ -191,6 +191,18 @@ sub volume_snapshot_delete {
     return PVE::Storage::Plugin::volume_snapshot_delete($class, $scfg, $storeid, $volname, $snap, $running);
 }
 
+sub volume_underlay_resize {
+    my ($class, $scfg, $storeid, $volname, $size) = @_;
+
+    my $path = $class->filesystem_path($scfg, $volname);
+
+    $size = ($size/1024/1024) . "M";
+    my $cmd = ['/sbin/lvextend', '-L', $size, $path];
+
+    #don't use global cluster lock here, use on native local lvm lock
+    run_command($cmd, errmsg => "error resizing volume '$path'");
+}
+
 sub volume_has_feature {
     my ($class, $scfg, $feature, $storeid, $volname, $snapname, $running) = @_;
 
diff --git a/src/PVE/Storage/Plugin.pm b/src/PVE/Storage/Plugin.pm
index 6444390..e930102 100644
--- a/src/PVE/Storage/Plugin.pm
+++ b/src/PVE/Storage/Plugin.pm
@@ -1071,6 +1071,13 @@ sub volume_resize {
     return undef;
 }
 
+sub volume_underlay_resize {
+    my ($class, $scfg, $storeid, $volname, $size) = @_;
+
+    # do nothing by default
+    return undef;
+}
+
 sub volume_snapshot {
     my ($class, $scfg, $storeid, $volname, $snap) = @_;
 
-- 
2.39.2