1 files changed, 59 insertions, 102 deletions

diff --git a/net/sched/sch_choke.c b/net/sched/sch_choke.c
index 3422b25df9e..e465064d39a 100644
--- a/net/sched/sch_choke.c
+++ b/net/sched/sch_choke.c
@@ -19,10 +19,7 @@
 #include <net/pkt_sched.h>
 #include <net/inet_ecn.h>
 #include <net/red.h>
-#include <linux/ip.h>
-#include <net/ip.h>
-#include <linux/ipv6.h>
-#include <net/ipv6.h>
+#include <net/flow_keys.h>
 
 /*
    CHOKe stateless AQM for fair bandwidth allocation
@@ -60,6 +57,7 @@ struct choke_sched_data {
 	struct red_parms parms;
 
 /* Variables */
+	struct red_vars  vars;
 	struct tcf_proto *filter_list;
 	struct {
 		u32	prob_drop;	/* Early probability drops */
@@ -142,85 +140,10 @@ static void choke_drop_by_idx(struct Qdisc *sch, unsigned int idx)
 	--sch->q.qlen;
 }
 
-/*
- * Compare flow of two packets
- *  Returns true only if source and destination address and port match.
- *          false for special cases
- */
-static bool choke_match_flow(struct sk_buff *skb1,
-			     struct sk_buff *skb2)
-{
-	int off1, off2, poff;
-	const u32 *ports1, *ports2;
-	u8 ip_proto;
-	__u32 hash1;
-
-	if (skb1->protocol != skb2->protocol)
-		return false;
-
-	/* Use hash value as quick check
-	 * Assumes that __skb_get_rxhash makes IP header and ports linear
-	 */
-	hash1 = skb_get_rxhash(skb1);
-	if (!hash1 || hash1 != skb_get_rxhash(skb2))
-		return false;
-
-	/* Probably match, but be sure to avoid hash collisions */
-	off1 = skb_network_offset(skb1);
-	off2 = skb_network_offset(skb2);
-
-	switch (skb1->protocol) {
-	case __constant_htons(ETH_P_IP): {
-		const struct iphdr *ip1, *ip2;
-
-		ip1 = (const struct iphdr *) (skb1->data + off1);
-		ip2 = (const struct iphdr *) (skb2->data + off2);
-
-		ip_proto = ip1->protocol;
-		if (ip_proto != ip2->protocol ||
-		    ip1->saddr != ip2->saddr || ip1->daddr != ip2->daddr)
-			return false;
-
-		if (ip_is_fragment(ip1) | ip_is_fragment(ip2))
-			ip_proto = 0;
-		off1 += ip1->ihl * 4;
-		off2 += ip2->ihl * 4;
-		break;
-	}
-
-	case __constant_htons(ETH_P_IPV6): {
-		const struct ipv6hdr *ip1, *ip2;
-
-		ip1 = (const struct ipv6hdr *) (skb1->data + off1);
-		ip2 = (const struct ipv6hdr *) (skb2->data + off2);
-
-		ip_proto = ip1->nexthdr;
-		if (ip_proto != ip2->nexthdr ||
-		    ipv6_addr_cmp(&ip1->saddr, &ip2->saddr) ||
-		    ipv6_addr_cmp(&ip1->daddr, &ip2->daddr))
-			return false;
-		off1 += 40;
-		off2 += 40;
-	}
-
-	default: /* Maybe compare MAC header here? */
-		return false;
-	}
-
-	poff = proto_ports_offset(ip_proto);
-	if (poff < 0)
-		return true;
-
-	off1 += poff;
-	off2 += poff;
-
-	ports1 = (__force u32 *)(skb1->data + off1);
-	ports2 = (__force u32 *)(skb2->data + off2);
-	return *ports1 == *ports2;
-}
-
 struct choke_skb_cb {
-	u16 classid;
+	u16			classid;
+	u8			keys_valid;
+	struct flow_keys	keys;
 };
 
 static inline struct choke_skb_cb *choke_skb_cb(const struct sk_buff *skb)
@@ -241,6 +164,32 @@ static u16 choke_get_classid(const struct sk_buff *skb)
 }
 
 /*
+ * Compare flow of two packets
+ *  Returns true only if source and destination address and port match.
+ *          false for special cases
+ */
+static bool choke_match_flow(struct sk_buff *skb1,
+			     struct sk_buff *skb2)
+{
+	if (skb1->protocol != skb2->protocol)
+		return false;
+
+	if (!choke_skb_cb(skb1)->keys_valid) {
+		choke_skb_cb(skb1)->keys_valid = 1;
+		skb_flow_dissect(skb1, &choke_skb_cb(skb1)->keys);
+	}
+
+	if (!choke_skb_cb(skb2)->keys_valid) {
+		choke_skb_cb(skb2)->keys_valid = 1;
+		skb_flow_dissect(skb2, &choke_skb_cb(skb2)->keys);
+	}
+
+	return !memcmp(&choke_skb_cb(skb1)->keys,
+		       &choke_skb_cb(skb2)->keys,
+		       sizeof(struct flow_keys));
+}
+
+/*
  * Classify flow using either:
  *  1. pre-existing classification result in skb
  *  2. fast internal classification
@@ -317,7 +266,7 @@ static bool choke_match_random(const struct choke_sched_data *q,
 static int choke_enqueue(struct sk_buff *skb, struct Qdisc *sch)
 {
 	struct choke_sched_data *q = qdisc_priv(sch);
-	struct red_parms *p = &q->parms;
+	const struct red_parms *p = &q->parms;
 	int ret = NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
 
 	if (q->filter_list) {
@@ -326,14 +275,15 @@ static int choke_enqueue(struct sk_buff *skb, struct Qdisc *sch)
 			goto other_drop;	/* Packet was eaten by filter */
 	}
 
+	choke_skb_cb(skb)->keys_valid = 0;
 	/* Compute average queue usage (see RED) */
-	p->qavg = red_calc_qavg(p, sch->q.qlen);
-	if (red_is_idling(p))
-		red_end_of_idle_period(p);
+	q->vars.qavg = red_calc_qavg(p, &q->vars, sch->q.qlen);
+	if (red_is_idling(&q->vars))
+		red_end_of_idle_period(&q->vars);
 
 	/* Is queue small? */
-	if (p->qavg <= p->qth_min)
-		p->qcount = -1;
+	if (q->vars.qavg <= p->qth_min)
+		q->vars.qcount = -1;
 	else {
 		unsigned int idx;
 
@@ -345,8 +295,8 @@ static int choke_enqueue(struct sk_buff *skb, struct Qdisc *sch)
 		}
 
 		/* Queue is large, always mark/drop */
-		if (p->qavg > p->qth_max) {
-			p->qcount = -1;
+		if (q->vars.qavg > p->qth_max) {
+			q->vars.qcount = -1;
 
 			sch->qstats.overlimits++;
 			if (use_harddrop(q) || !use_ecn(q) ||
@@ -356,10 +306,10 @@ static int choke_enqueue(struct sk_buff *skb, struct Qdisc *sch)
 			}
 
 			q->stats.forced_mark++;
-		} else if (++p->qcount) {
-			if (red_mark_probability(p, p->qavg)) {
-				p->qcount = 0;
-				p->qR = red_random(p);
+		} else if (++q->vars.qcount) {
+			if (red_mark_probability(p, &q->vars, q->vars.qavg)) {
+				q->vars.qcount = 0;
+				q->vars.qR = red_random(p);
 
 				sch->qstats.overlimits++;
 				if (!use_ecn(q) || !INET_ECN_set_ce(skb)) {
@@ -370,7 +320,7 @@ static int choke_enqueue(struct sk_buff *skb, struct Qdisc *sch)
 				q->stats.prob_mark++;
 			}
 		} else
-			p->qR = red_random(p);
+			q->vars.qR = red_random(p);
 	}
 
 	/* Admit new packet */
@@ -404,8 +354,8 @@ static struct sk_buff *choke_dequeue(struct Qdisc *sch)
 	struct sk_buff *skb;
 
 	if (q->head == q->tail) {
-		if (!red_is_idling(&q->parms))
-			red_start_of_idle_period(&q->parms);
+		if (!red_is_idling(&q->vars))
+			red_start_of_idle_period(&q->vars);
 		return NULL;
 	}
 
@@ -428,8 +378,8 @@ static unsigned int choke_drop(struct Qdisc *sch)
 	if (len > 0)
 		q->stats.other++;
 	else {
-		if (!red_is_idling(&q->parms))
-			red_start_of_idle_period(&q->parms);
+		if (!red_is_idling(&q->vars))
+			red_start_of_idle_period(&q->vars);
 	}
 
 	return len;
@@ -439,12 +389,13 @@ static void choke_reset(struct Qdisc *sch)
 {
 	struct choke_sched_data *q = qdisc_priv(sch);
 
-	red_restart(&q->parms);
+	red_restart(&q->vars);
 }
 
 static const struct nla_policy choke_policy[TCA_CHOKE_MAX + 1] = {
 	[TCA_CHOKE_PARMS]	= { .len = sizeof(struct tc_red_qopt) },
 	[TCA_CHOKE_STAB]	= { .len = RED_STAB_SIZE },
+	[TCA_CHOKE_MAX_P]	= { .type = NLA_U32 },
 };
 
 
@@ -466,6 +417,7 @@ static int choke_change(struct Qdisc *sch, struct nlattr *opt)
 	int err;
 	struct sk_buff **old = NULL;
 	unsigned int mask;
+	u32 max_P;
 
 	if (opt == NULL)
 		return -EINVAL;
@@ -478,6 +430,8 @@ static int choke_change(struct Qdisc *sch, struct nlattr *opt)
 	    tb[TCA_CHOKE_STAB] == NULL)
 		return -EINVAL;
 
+	max_P = tb[TCA_CHOKE_MAX_P] ? nla_get_u32(tb[TCA_CHOKE_MAX_P]) : 0;
+
 	ctl = nla_data(tb[TCA_CHOKE_PARMS]);
 
 	if (ctl->limit > CHOKE_MAX_QUEUE)
@@ -527,10 +481,12 @@ static int choke_change(struct Qdisc *sch, struct nlattr *opt)
 
 	red_set_parms(&q->parms, ctl->qth_min, ctl->qth_max, ctl->Wlog,
 		      ctl->Plog, ctl->Scell_log,
-		      nla_data(tb[TCA_CHOKE_STAB]));
+		      nla_data(tb[TCA_CHOKE_STAB]),
+		      max_P);
+	red_set_vars(&q->vars);
 
 	if (q->head == q->tail)
-		red_end_of_idle_period(&q->parms);
+		red_end_of_idle_period(&q->vars);
 
 	sch_tree_unlock(sch);
 	choke_free(old);
@@ -561,6 +517,7 @@ static int choke_dump(struct Qdisc *sch, struct sk_buff *skb)
 		goto nla_put_failure;
 
 	NLA_PUT(skb, TCA_CHOKE_PARMS, sizeof(opt), &opt);
+	NLA_PUT_U32(skb, TCA_CHOKE_MAX_P, q->parms.max_P);
 	return nla_nest_end(skb, opts);
 
 nla_put_failure: