From 2e99403d28c182aa7ffb2d4ef34472df4873a4dd Mon Sep 17 00:00:00 2001 From: Tom Herbert Date: Fri, 1 May 2015 11:30:18 -0700 Subject: [PATCH] sch_choke: Use flow_keys_digest 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 Signed-off-by: David S. Miller --- net/sched/sch_choke.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) diff --git a/net/sched/sch_choke.c b/net/sched/sch_choke.c index c009eb9045ce..dfe3da75594c 100644 --- a/net/sched/sch_choke.c +++ b/net/sched/sch_choke.c @@ -133,16 +133,10 @@ static void choke_drop_by_idx(struct Qdisc *sch, unsigned int idx) --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 { u16 classid; 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) @@ -177,18 +171,18 @@ static bool choke_match_flow(struct sk_buff *skb1, if (!choke_skb_cb(skb1)->keys_valid) { choke_skb_cb(skb1)->keys_valid = 1; 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) { choke_skb_cb(skb2)->keys_valid = 1; 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, &choke_skb_cb(skb2)->keys, - CHOKE_K_LEN); + sizeof(choke_skb_cb(skb1)->keys)); } /* -- 2.30.2