vrf: add CRC32c offload to device features

dcaratti · davem330 · commit cb1603948a0b · 2018-05-28T22:55:13.000-04:00
SCTP sockets originated in a VRF can improve their performance if CRC32c computation is delegated to underlying devices: update device features, setting NETIF_F_SCTP_CRC. Iterating the following command in the topology proposed with [1], # ip vrf exec vrf-h2 netperf -H 192.0.2.1 -t SCTP_STREAM -- -m 10K the measured throughput in Mbit/s improved from 2395 ± 1% to 2720 ± 1%. [1] https://www.spinics.net/lists/netdev/msg486007.html Signed-off-by: Davide Caratti <dcaratti@redhat.com> Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Acked-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c
@@ -1254,7 +1254,7 @@ static void vrf_setup(struct net_device *dev)
 
 	/* enable offload features */
 	dev->features   |= NETIF_F_GSO_SOFTWARE;
-	dev->features   |= NETIF_F_RXCSUM | NETIF_F_HW_CSUM;
+	dev->features   |= NETIF_F_RXCSUM | NETIF_F_HW_CSUM | NETIF_F_SCTP_CRC;
 	dev->features   |= NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA;
 
 	dev->hw_features = dev->features;
