[pve-devel] [RFC storage v3 11/34] add storage_has_feature() helper function

[Fiona Ebner]

Which looks up whether a storage supports a given feature in its
'plugindata'. This is intentionally kept simple and not implemented
as a plugin method for now. Should it ever become more complex
requiring plugins to override the default implementation, it can
later be changed to a method.

Suggested-by: Fabian Grünbichler <f.gruenbichler at proxmox.com>
Signed-off-by: Fiona Ebner <f.ebner at proxmox.com>
---

New in v3.

 src/PVE/Storage.pm        |  8 ++++++++
 src/PVE/Storage/Plugin.pm | 10 ++++++++++
 2 files changed, 18 insertions(+)

diff --git a/src/PVE/Storage.pm b/src/PVE/Storage.pm
index 57b2038..e251056 100755
--- a/src/PVE/Storage.pm
+++ b/src/PVE/Storage.pm
@@ -204,6 +204,14 @@ sub storage_check_enabled {
     return storage_check_node($cfg, $storeid, $node, $noerr);
 }
 
+sub storage_has_feature {
+    my ($cfg, $storeid, $feature) = @_;
+
+    my $scfg = storage_config($cfg, $storeid);
+
+    return PVE::Storage::Plugin::storage_has_feature($scfg->{type}, $feature);
+}
+
 # storage_can_replicate:
 # return true if storage supports replication
 # (volumes allocated with vdisk_alloc() has replication feature)
diff --git a/src/PVE/Storage/Plugin.pm b/src/PVE/Storage/Plugin.pm
index 8cc693c..6071e45 100644
--- a/src/PVE/Storage/Plugin.pm
+++ b/src/PVE/Storage/Plugin.pm
@@ -244,6 +244,16 @@ sub dirs_hash_to_string {
     return join(',', map { "$_=$hash->{$_}" } sort keys %$hash);
 }
 
+sub storage_has_feature {
+    my ($type, $feature) = @_;
+
+    my $data = $defaultData->{plugindata}->{$type};
+    if (my $features = $data->{features}) {
+	return $features->{$feature};
+    }
+    return;
+}
+
 sub default_format {
     my ($scfg) = @_;
 
-- 
2.39.5