From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Durrant Subject: [PATCH net-next v4 4/4] xen-netback: use hash value from the frontend Date: Fri, 13 May 2016 09:37:29 +0100 Message-ID: <1463128649-20832-5-git-send-email-paul.durrant@citrix.com> References: <1463128649-20832-1-git-send-email-paul.durrant@citrix.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Paul Durrant To: , Return-path: Received: from smtp02.citrix.com ([66.165.176.63]:6218 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751407AbcEMIvM (ORCPT ); Fri, 13 May 2016 04:51:12 -0400 In-Reply-To: <1463128649-20832-1-git-send-email-paul.durrant@citrix.com> Sender: netdev-owner@vger.kernel.org List-ID: My recent patch to include/xen/interface/io/netif.h defines a new extra info type that can be used to pass hash values between backend and guest frontend. This patch adds code to xen-netback to use the value in a hash extra info fragment passed from the guest frontend in a transmit-side (i.e. netback receive side) packet to set the skb hash accordingly. Signed-off-by: Paul Durrant Acked-by: Wei Liu --- drivers/net/xen-netback/netback.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c index 7c72510..a5b5aad 100644 --- a/drivers/net/xen-netback/netback.c +++ b/drivers/net/xen-netback/netback.c @@ -1509,6 +1509,33 @@ static void xenvif_tx_build_gops(struct xenvif_queue *queue, } } + if (extras[XEN_NETIF_EXTRA_TYPE_HASH - 1].type) { + struct xen_netif_extra_info *extra; + enum pkt_hash_types type = PKT_HASH_TYPE_NONE; + + extra = &extras[XEN_NETIF_EXTRA_TYPE_HASH - 1]; + + switch (extra->u.hash.type) { + case _XEN_NETIF_CTRL_HASH_TYPE_IPV4: + case _XEN_NETIF_CTRL_HASH_TYPE_IPV6: + type = PKT_HASH_TYPE_L3; + break; + + case _XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP: + case _XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP: + type = PKT_HASH_TYPE_L4; + break; + + default: + break; + } + + if (type != PKT_HASH_TYPE_NONE) + skb_set_hash(skb, + *(u32 *)extra->u.hash.value, + type); + } + XENVIF_TX_CB(skb)->pending_idx = pending_idx; __skb_put(skb, data_len); -- 2.1.4