From b17c706987fa6f28bdc1771c8266e7a69e22adcb Mon Sep 17 00:00:00 2001 From: Daniel Borkmann <dborkman@redhat.com> Date: Sat, 22 Feb 2014 14:01:53 +0100 Subject: [PATCH] loopback: sctp: add NETIF_F_SCTP_CSUM to device features Drivers are allowed to set NETIF_F_SCTP_CSUM if they have hardware crc32c checksumming support for the SCTP protocol. Currently, NETIF_F_SCTP_CSUM flag is available in igb, ixgbe, i40e/i40evf drivers and for vlan devices. If we don't have NETIF_F_SCTP_CSUM then crc32c is done through CPU instructions, invoked from crypto layer, or if not available as slow-path fallback in software. Currently, loopback device propagates checksum offloading feature flags in dev->features, but is missing SCTP checksum offloading. Therefore, account for NETIF_F_SCTP_CSUM as well. Before patch: ./netperf_sctp -H 192.168.0.100 -t SCTP_STREAM_MANY SCTP 1-TO-MANY STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.0.100 () port 0 AF_INET Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 4194304 4194304 4096 10.00 4683.50 After patch: ./netperf_sctp -H 192.168.0.100 -t SCTP_STREAM_MANY SCTP 1-TO-MANY STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.0.100 () port 0 AF_INET Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 4194304 4194304 4096 10.00 15348.26 Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> --- drivers/net/loopback.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c index 771c9bfa7d31..282effee7e1c 100644 --- a/drivers/net/loopback.c +++ b/drivers/net/loopback.c @@ -176,6 +176,7 @@ static void loopback_setup(struct net_device *dev) | NETIF_F_UFO | NETIF_F_HW_CSUM | NETIF_F_RXCSUM + | NETIF_F_SCTP_CSUM | NETIF_F_HIGHDMA | NETIF_F_LLTX | NETIF_F_NETNS_LOCAL -- GitLab