Does open-iscsi initiator support zero copy implementation.

I have the following environment. In L2 machine, I have the scst based iscsi 
target. Scst supports zero copy. Does the initiator supports zero copy

+++++++++++++++++
+                       +
+                       +
+   initiator   + L1
+                       +
+                       +
+                       +
+++++++++++++++++
        |
        |
+++++++++++++++++
+     scst              +
+                       +
+               + L2
+                       +
+  initiator    +
+                       +
+++++++++++++++++
        |
        |
+++++++++++++++++
+                       +
+                       +
+     Disk              + L3 (Disk)
+                       +
+                       +
+                       +
+++++++++++++++++

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