From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Durrant Subject: [PATCH net-next v1 8/8] xen-netback: use toeplitz hash value from the frontend Date: Fri, 12 Feb 2016 10:13:25 +0000 Message-ID: <1455272005-17144-9-git-send-email-paul.durrant@citrix.com> References: <1455272005-17144-1-git-send-email-paul.durrant@citrix.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Paul Durrant , Ian Campbell , Wei Liu To: , Return-path: Received: from smtp02.citrix.com ([66.165.176.63]:23531 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751929AbcBLKVm (ORCPT ); Fri, 12 Feb 2016 05:21:42 -0500 In-Reply-To: <1455272005-17144-1-git-send-email-paul.durrant@citrix.com> Sender: netdev-owner@vger.kernel.org List-ID: This patch adds code to xen-netback to use the value in a toeplitz hash extra info fragment passed from the VM frontend in a transmit-side packet to set the skb hash accordingly. Signed-off-by: Paul Durrant Cc: Ian Campbell Cc: Wei Liu --- drivers/net/xen-netback/netback.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c index 57c91fe..f550b8a 100644 --- a/drivers/net/xen-netback/netback.c +++ b/drivers/net/xen-netback/netback.c @@ -1341,6 +1341,28 @@ void xenvif_mcast_addr_list_free(struct xenvif *vif) } } +static void xenvif_set_skb_hash(struct xenvif *vif, + struct sk_buff *skb, + struct xen_netif_extra_info *extra) +{ + u32 hash = *(u32 *)extra->u.toeplitz.value; + enum pkt_hash_types type = PKT_HASH_TYPE_NONE; + + switch (extra->u.toeplitz.type) { + case _XEN_NETIF_CTRL_TOEPLITZ_HASH_IPV4: + case _XEN_NETIF_CTRL_TOEPLITZ_HASH_IPV6: + type = PKT_HASH_TYPE_L3; + break; + + case _XEN_NETIF_CTRL_TOEPLITZ_HASH_IPV4_TCP: + case _XEN_NETIF_CTRL_TOEPLITZ_HASH_IPV6_TCP: + type = PKT_HASH_TYPE_L4; + break; + } + + skb_set_hash(skb, hash, type); +} + static void xenvif_tx_build_gops(struct xenvif_queue *queue, int budget, unsigned *copy_ops, @@ -1502,6 +1524,13 @@ static void xenvif_tx_build_gops(struct xenvif_queue *queue, } } + if (extras[XEN_NETIF_EXTRA_TYPE_TOEPLITZ - 1].type) { + struct xen_netif_extra_info *extra; + + extra = &extras[XEN_NETIF_EXTRA_TYPE_TOEPLITZ - 1]; + xenvif_set_skb_hash(queue->vif, skb, extra); + } + XENVIF_TX_CB(skb)->pending_idx = pending_idx; __skb_put(skb, data_len); -- 2.1.4