sctp: add support for busy polling to sctp protocol
The busy polling socket option adds support for sockets to busy wait on data arriving on the napi queue from which they have most recently received a frame. Currently only tcp and udp support this feature, but theres no reason sctp can't do so as well. Add it in so appliations can take advantage of it Signed-off-by: Neil Horman <nhorman@tuxdriver.com> CC: Vlad Yasevich <vyasevich@gmail.com> CC: "David S. Miller" <davem@davemloft.net> CC: Daniel Borkmann <dborkman@redhat.com> CC: netdev@vger.kernel.org Acked-by: Vlad Yasevich <vyasevich@gmail.com> Acked-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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