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Commit 1cdb0905 authored by Pablo Neira Ayuso's avatar Pablo Neira Ayuso
Browse files

netfilter: nfnetlink_queue: use xor hash function to distribute instances 



Thanks to Eric Dumazet for suggesting this during the NFWS.

Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
parent fa900b9c

net/netfilter/nfnetlink_queue_core.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -73,7 +73,7 @@ static struct hlist_head instance_table[INSTANCE_BUCKETS] __read_mostly; 




static inline u_int8_t instance_hashfn(u_int16_t queue_num)

static inline u_int8_t instance_hashfn(u_int16_t queue_num)

{

{

	return ((queue_num >> 8) | queue_num) % INSTANCE_BUCKETS;

	return ((queue_num >> 8) ^ queue_num) % INSTANCE_BUCKETS;

}

}





static struct nfqnl_instance *

static struct nfqnl_instance *