net: rps: support 802.1Q
flat view
From: Changli Gao <hidden>
Date: 2011-08-19 05:06:45
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
For the 802.1Q packets, if the NIC doesn't support hw-accel-vlan-rx, RPS won't inspect the internal 4 tuples to generate skb->rxhash, so this kind of traffic can't get any benefit from RPS. This patch adds the support for 802.1Q to RPS. Signed-off-by: Changli Gao <redacted> --- net/core/dev.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/net/core/dev.c b/net/core/dev.c
index ead0366..be7ee50 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c@@ -2529,6 +2529,7 @@ void __skb_get_rxhash(struct sk_buff *skb) int nhoff, hash = 0, poff; const struct ipv6hdr *ip6; const struct iphdr *ip; + const struct vlan_hdr *vlan; u8 ip_proto; u32 addr1, addr2; u16 proto;
@@ -2565,6 +2566,13 @@ again: addr2 = (__force u32) ip6->daddr.s6_addr32[3]; nhoff += 40; break; + case __constant_htons(ETH_P_8021Q): + if (!pskb_may_pull(skb, sizeof(*vlan) + nhoff)) + goto done; + vlan = (const struct vlan_hdr *) (skb->data + nhoff); + proto = vlan->h_vlan_encapsulated_proto; + nhoff += sizeof(*vlan); + goto again; default: goto done; }