tree 544273c11f02e86662c0c02f9b9866b667839970
parent 5a5275af7007ce4e4bd9c1c57a4b0a6664361e3a
author Craig Gallek <kraig@google.com> 1455123040 -0500
committer SamarV-121 <samarvispute121@pm.me> 1658757636 +0530
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soreuseport: fast reuseport TCP socket selection

This change extends the fast SO_REUSEPORT socket lookup implemented
for UDP to TCP.  Listener sockets with SO_REUSEPORT and the same
receive address are additionally added to an array for faster
random access.  This means that only a single socket from the group
must be found in the listener list before any socket in the group can
be used to receive a packet.  Previously, every socket in the group
needed to be considered before handing off the incoming packet.

This feature also exposes the ability to use a BPF program when
selecting a socket from a reuseport group.

Signed-off-by: Craig Gallek <kraig@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Change-Id: I84cc6952d273fcb1b1dba7cbf31504ea135ecdae