From 83aa025f535f76733e334e3d2a4d8577c8441a7e Mon Sep 17 00:00:00 2001 From: Willem de Bruijn Date: Thu, 26 Apr 2018 13:42:21 -0400 Subject: udp: add gso support to virtual devices Virtual devices such as tunnels and bonding can handle large packets. Only segment packets when reaching a physical or loopback device. Signed-off-by: Willem de Bruijn Signed-off-by: David S. Miller --- Documentation/networking/netdev-features.txt | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'Documentation/networking/netdev-features.txt') diff --git a/Documentation/networking/netdev-features.txt b/Documentation/networking/netdev-features.txt index c77f9d57eb91..c4a54c162547 100644 --- a/Documentation/networking/netdev-features.txt +++ b/Documentation/networking/netdev-features.txt @@ -113,6 +113,13 @@ whatever headers there might be. NETIF_F_TSO_ECN means that hardware can properly split packets with CWR bit set, be it TCPv4 (when NETIF_F_TSO is enabled) or TCPv6 (NETIF_F_TSO6). + * Transmit UDP segmentation offload + +NETIF_F_GSO_UDP_GSO_L4 accepts a single UDP header with a payload that exceeds +gso_size. On segmentation, it segments the payload on gso_size boundaries and +replicates the network and UDP headers (fixing up the last one if less than +gso_size). + * Transmit DMA from high memory On platforms where this is relevant, NETIF_F_HIGHDMA signals that -- cgit v1.2.3-59-g8ed1b