vrf: add CRC32c offload to device features

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 <[email protected]> Reviewed-by: Marcelo Ricardo Leitner <[email protected]> Acked-by: David Ahern <[email protected]> Signed-off-by: David S. Miller <[email protected]>
fracktal · May 29, 2018 · cb16039 · cb16039
1 parent 29555fa
commit cb16039
Showing 1 changed file with 1 addition and 1 deletion.
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;