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authorPaul Durrant <Paul.Durrant@citrix.com>2016-05-13 09:37:29 +0100
committerDavid S. Miller <davem@davemloft.net>2016-05-16 13:35:56 -0400
commitc2d09fde7299f68f29e84fe5a415d5c1a7abae75 (patch)
tree5d60ff79f437dd98e068056232639d710aa4245c /drivers/net/xen-netback
parentxen-netback: pass hash value to the frontend (diff)
downloadlinux-dev-c2d09fde7299f68f29e84fe5a415d5c1a7abae75.tar.xz
linux-dev-c2d09fde7299f68f29e84fe5a415d5c1a7abae75.zip
xen-netback: use hash value from the frontend
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 <paul.durrant@citrix.com> Acked-by: Wei Liu <wei.liu2@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/xen-netback')
-rw-r--r--drivers/net/xen-netback/netback.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index 9d6bd862f3c1..edbae0b1e8f0 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -1510,6 +1510,33 @@ 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);