From mboxrd@z Thu Jan 1 00:00:00 1970 From: Or Gerlitz Subject: [PATCH net-next V3 0/3] net: Add GRO support for UDP encapsulating protocols Date: Tue, 14 Jan 2014 18:00:09 +0200 Message-ID: <1389715212-14504-1-git-send-email-ogerlitz@mellanox.com> Cc: netdev@vger.kernel.org, hkchu@google.com, edumazet@google.com, herbert@gondor.apana.org.au, yanb@mellanox.com, shlomop@mellanox.com, therbert@google.com, Or Gerlitz To: davem@davemloft.net Return-path: Received: from mailp.voltaire.com ([193.47.165.129]:53709 "EHLO mellanox.co.il" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751756AbaANQAa (ORCPT ); Tue, 14 Jan 2014 11:00:30 -0500 Sender: netdev-owner@vger.kernel.org List-ID: This series adds GRO handlers for protocols that do UDP encapsulation, with the intent of being able to coalesce packets which encapsulate packets belonging to the same TCP session. For GRO purposes, the destination UDP port takes the role of the ether type field in the ethernet header or the next protocol in the IP header. The UDP GRO handler will only attempt to coalesce packets whose destination port is registered to have gro handler. The patches done against net-next ae237b3ede64 "net: 3com: fix warning for incorrect type in argument" Or. v3 --> v4 changes: - applied feedback from Tom on some micro-optimizations that save branches and goto directives in the udp gro logic - applied feedback from Eric on correct RCU programming for the add/remove flow of the upper protocols udp gro handlers v2 --> v3 changes: - moved to use linked list to store the udp gro handlers, this solves the problem of consuming 512KB of memory for the handlers. - use a mark on the skb GRO CB data to disallow running the udp gro_receive twice on a packet, this solves the problem of udp encapsulated packets whose inner VM packet is udp and happen to carry a port which has registered offloads - and flush it. - invoke the udp offload protocol registration and de-registration from the vxlan driver in a sleepable context For unclear some reason I got this warning when the vxlan driver deletes the udp offload structure *** BLURB HERE *** Or Gerlitz (3): net: Add GRO support for UDP encapsulating protocols net: Export gro_find_by_type helpers net: Add GRO support for vxlan traffic drivers/net/vxlan.c | 117 +++++++++++++++++++++++++++++++-- include/linux/netdevice.h | 10 +++- include/net/protocol.h | 3 + include/net/vxlan.h | 1 + net/core/dev.c | 3 + net/ipv4/udp_offload.c | 157 +++++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 283 insertions(+), 8 deletions(-)