- OFPBUF_STACK, /* Stack space or static buffer. */
- OFPBUF_CONST /* Must not be expanded. */
+ OFPBUF_STACK, /* Un-movable stack space or static buffer. */
+ OFPBUF_STUB, /* Starts on stack, may expand into heap. */
+ OFPBUF_DPDK, /* buffer data is from DPDK allocated memory.
+ ref to build_ofpbuf() in netdev-dpdk. */