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Date: Tue, 29 Nov 2011 14:40:45 +0100
From: Eric Dumazet <eric.dumazet@...il.com>
To: David Miller <davem@...emloft.net>
Cc: netdev <netdev@...r.kernel.org>
Subject: [PATCH net-next] sch_sfq: use skb_flow_dissect()
Instead of using a custom flow dissector, use skb_flow_dissect() and
benefit from tunnelling support.
Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
---
net/sched/sch_sfq.c | 65 ++++++------------------------------------
1 file changed, 10 insertions(+), 55 deletions(-)
diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c
index 4f5510e..c8da556 100644
--- a/net/sched/sch_sfq.c
+++ b/net/sched/sch_sfq.c
@@ -17,14 +17,13 @@
#include <linux/in.h>
#include <linux/errno.h>
#include <linux/init.h>
-#include <linux/ipv6.h>
#include <linux/skbuff.h>
#include <linux/jhash.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
-#include <net/ip.h>
#include <net/netlink.h>
#include <net/pkt_sched.h>
+#include <net/flow_keys.h>
/* Stochastic Fairness Queuing algorithm.
@@ -137,61 +136,17 @@ static inline struct sfq_head *sfq_dep_head(struct sfq_sched_data *q, sfq_index
return &q->dep[val - SFQ_SLOTS];
}
-static unsigned int sfq_fold_hash(struct sfq_sched_data *q, u32 h, u32 h1)
+static unsigned int sfq_hash(const struct sfq_sched_data *q,
+ const struct sk_buff *skb)
{
- return jhash_2words(h, h1, q->perturbation) & (q->divisor - 1);
-}
-
-static unsigned int sfq_hash(struct sfq_sched_data *q, struct sk_buff *skb)
-{
- u32 h, h2;
-
- switch (skb->protocol) {
- case htons(ETH_P_IP):
- {
- const struct iphdr *iph;
- int poff;
-
- if (!pskb_network_may_pull(skb, sizeof(*iph)))
- goto err;
- iph = ip_hdr(skb);
- h = (__force u32)iph->daddr;
- h2 = (__force u32)iph->saddr ^ iph->protocol;
- if (ip_is_fragment(iph))
- break;
- poff = proto_ports_offset(iph->protocol);
- if (poff >= 0 &&
- pskb_network_may_pull(skb, iph->ihl * 4 + 4 + poff)) {
- iph = ip_hdr(skb);
- h2 ^= *(u32 *)((void *)iph + iph->ihl * 4 + poff);
- }
- break;
- }
- case htons(ETH_P_IPV6):
- {
- const struct ipv6hdr *iph;
- int poff;
-
- if (!pskb_network_may_pull(skb, sizeof(*iph)))
- goto err;
- iph = ipv6_hdr(skb);
- h = (__force u32)iph->daddr.s6_addr32[3];
- h2 = (__force u32)iph->saddr.s6_addr32[3] ^ iph->nexthdr;
- poff = proto_ports_offset(iph->nexthdr);
- if (poff >= 0 &&
- pskb_network_may_pull(skb, sizeof(*iph) + 4 + poff)) {
- iph = ipv6_hdr(skb);
- h2 ^= *(u32 *)((void *)iph + sizeof(*iph) + poff);
- }
- break;
- }
- default:
-err:
- h = (unsigned long)skb_dst(skb) ^ (__force u32)skb->protocol;
- h2 = (unsigned long)skb->sk;
- }
+ struct flow_keys keys;
+ unsigned int hash;
- return sfq_fold_hash(q, h, h2);
+ skb_flow_dissect(skb, &keys);
+ hash = jhash_3words((__force u32)keys.dst,
+ (__force u32)keys.src ^ keys.ip_proto,
+ (__force u32)keys.ports, q->perturbation);
+ return hash & (q->divisor - 1);
}
static unsigned int sfq_classify(struct sk_buff *skb, struct Qdisc *sch,
--
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