ec shard info can be queried via VolumeList()

weed/topology/data_node_ec.go

@@ -0,0 +1,14 @@
+package topology
+
+import (
+	"github.com/chrislusf/seaweedfs/weed/storage/erasure_coding"
+)
+
+func (dn *DataNode) GetEcShards() (ret []erasure_coding.EcVolumeInfo) {
+	dn.RLock()
+	for _, ecVolumeInfo := range dn.ecShards {
+		ret = append(ret, ecVolumeInfo)
+	}
+	dn.RUnlock()
+	return ret
+}