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sch_choke: Use flow_keys_digest

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Call make_flow_keys_digest to get a digest from flow keys and
use that to pass skbuff cb and for comparing flows.

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2015-05-01 11:30:18 -07:00 • committed by David S. Miller
parent 2f59e1ebaa
commit 2e99403d28
1 changed files with 4 additions and 10 deletions
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14
net/sched/sch_choke.c
View file

@ -133,16 +133,10 @@ static void choke_drop_by_idx(struct Qdisc *sch, unsigned int idx)
--sch->q.qlen; --sch->q.qlen;
} }
/* private part of skb->cb[] that a qdisc is allowed to use
* is limited to QDISC_CB_PRIV_LEN bytes.
* As a flow key might be too large, we store a part of it only.
*/
#define CHOKE_K_LEN min_t(u32, sizeof(struct flow_keys), QDISC_CB_PRIV_LEN - 3)
struct choke_skb_cb { struct choke_skb_cb {
u16 classid; u16 classid;
u8 keys_valid; u8 keys_valid;
u8 keys[QDISC_CB_PRIV_LEN - 3]; struct flow_keys_digest keys;
}; };
static inline struct choke_skb_cb *choke_skb_cb(const struct sk_buff *skb) static inline struct choke_skb_cb *choke_skb_cb(const struct sk_buff *skb)
@ -177,18 +171,18 @@ static bool choke_match_flow(struct sk_buff *skb1,
if (!choke_skb_cb(skb1)->keys_valid) { if (!choke_skb_cb(skb1)->keys_valid) {
choke_skb_cb(skb1)->keys_valid = 1; choke_skb_cb(skb1)->keys_valid = 1;
skb_flow_dissect(skb1, &temp); skb_flow_dissect(skb1, &temp);
memcpy(&choke_skb_cb(skb1)->keys, &temp, CHOKE_K_LEN); make_flow_keys_digest(&choke_skb_cb(skb1)->keys, &temp);
} }
if (!choke_skb_cb(skb2)->keys_valid) { if (!choke_skb_cb(skb2)->keys_valid) {
choke_skb_cb(skb2)->keys_valid = 1; choke_skb_cb(skb2)->keys_valid = 1;
skb_flow_dissect(skb2, &temp); skb_flow_dissect(skb2, &temp);
memcpy(&choke_skb_cb(skb2)->keys, &temp, CHOKE_K_LEN); make_flow_keys_digest(&choke_skb_cb(skb2)->keys, &temp);
} }
return !memcmp(&choke_skb_cb(skb1)->keys, return !memcmp(&choke_skb_cb(skb1)->keys,
&choke_skb_cb(skb2)->keys, &choke_skb_cb(skb2)->keys,
CHOKE_K_LEN); sizeof(choke_skb_cb(skb1)->keys));
} }
/* /*