diff options
| -rw-r--r-- | net/ipv4/udp.c | 76 |
1 files changed, 19 insertions, 57 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index aff2a8e99e01..3fb0ed5e4789 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -380,15 +380,12 @@ static int compute_score(struct sock *sk, struct net *net, ipv6_only_sock(sk)) return -1; - score = (sk->sk_family == PF_INET) ? 2 : 1; - inet = inet_sk(sk); + if (sk->sk_rcv_saddr != daddr) + return -1; - if (inet->inet_rcv_saddr) { - if (inet->inet_rcv_saddr != daddr) - return -1; - score += 4; - } + score = (sk->sk_family == PF_INET) ? 2 : 1; + inet = inet_sk(sk); if (inet->inet_daddr) { if (inet->inet_daddr != saddr) return -1; @@ -464,65 +461,30 @@ struct sock *__udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport, __be32 daddr, __be16 dport, int dif, int sdif, struct udp_table *udptable, struct sk_buff *skb) { - struct sock *sk, *result; + struct sock *result; unsigned short hnum = ntohs(dport); - unsigned int hash2, slot2, slot = udp_hashfn(net, hnum, udptable->mask); - struct udp_hslot *hslot2, *hslot = &udptable->hash[slot]; + unsigned int hash2, slot2; + struct udp_hslot *hslot2; bool exact_dif = udp_lib_exact_dif_match(net, skb); - int score, badness; - u32 hash = 0; - if (hslot->count > 10) { - hash2 = ipv4_portaddr_hash(net, daddr, hnum); + hash2 = ipv4_portaddr_hash(net, daddr, hnum); + slot2 = hash2 & udptable->mask; + hslot2 = &udptable->hash2[slot2]; + + result = udp4_lib_lookup2(net, saddr, sport, + daddr, hnum, dif, sdif, + exact_dif, hslot2, skb); + if (!result) { + hash2 = ipv4_portaddr_hash(net, htonl(INADDR_ANY), hnum); slot2 = hash2 & udptable->mask; hslot2 = &udptable->hash2[slot2]; - if (hslot->count < hslot2->count) - goto begin; result = udp4_lib_lookup2(net, saddr, sport, - daddr, hnum, dif, sdif, + htonl(INADDR_ANY), hnum, dif, sdif, exact_dif, hslot2, skb); - if (!result) { - unsigned int old_slot2 = slot2; - hash2 = ipv4_portaddr_hash(net, htonl(INADDR_ANY), hnum); - slot2 = hash2 & udptable->mask; - /* avoid searching the same slot again. */ - if (unlikely(slot2 == old_slot2)) - return result; - - hslot2 = &udptable->hash2[slot2]; - if (hslot->count < hslot2->count) - goto begin; - - result = udp4_lib_lookup2(net, saddr, sport, - daddr, hnum, dif, sdif, - exact_dif, hslot2, skb); - } - if (unlikely(IS_ERR(result))) - return NULL; - return result; - } -begin: - result = NULL; - badness = 0; - sk_for_each_rcu(sk, &hslot->head) { - score = compute_score(sk, net, saddr, sport, - daddr, hnum, dif, sdif, exact_dif); - if (score > badness) { - if (sk->sk_reuseport) { - hash = udp_ehashfn(net, daddr, hnum, - saddr, sport); - result = reuseport_select_sock(sk, hash, skb, - sizeof(struct udphdr)); - if (unlikely(IS_ERR(result))) - return NULL; - if (result) - return result; - } - result = sk; - badness = score; - } } + if (unlikely(IS_ERR(result))) + return NULL; return result; } EXPORT_SYMBOL_GPL(__udp4_lib_lookup); |