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Diffstat (limited to 'net/sched/sch_choke.c')
-rw-r--r--net/sched/sch_choke.c121
1 files changed, 38 insertions, 83 deletions
diff --git a/net/sched/sch_choke.c b/net/sched/sch_choke.c
index 3422b25df9e..bef00acb8bd 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
@@ -142,85 +139,10 @@ 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 +163,32 @@ 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
@@ -326,6 +274,7 @@ 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))
@@ -445,6 +394,7 @@ static void choke_reset(struct Qdisc *sch)
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 +416,7 @@ 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 +429,8 @@ 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)
@@ -527,7 +480,8 @@ 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);
if (q->head == q->tail)
red_end_of_idle_period(&q->parms);
@@ -561,6 +515,7 @@ 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: