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| author | Pavel Emelyanov <xemul@openvz.org> | 2008-06-16 17:11:50 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-06-16 17:11:50 -0700 |
| commit | d6266281f8175e3ad68c28b20a609b278b47ade5 (patch) | |
| tree | 16e8643eb5560d70daf1097c3a09df21b6d186c1 /net/ipv4/udp.c | |
| parent | 942e7b102a4827fdb69a39c7f07c544542589ef9 (diff) | |
| download | linux-stable-d6266281f8175e3ad68c28b20a609b278b47ade5.tar.gz linux-stable-d6266281f8175e3ad68c28b20a609b278b47ade5.tar.bz2 linux-stable-d6266281f8175e3ad68c28b20a609b278b47ade5.zip | |
udp: introduce a udp_hashfn function
Currently the chain to store a UDP socket is calculated with
simple (x & (UDP_HTABLE_SIZE - 1)). But taking net into account
would make this calculation a bit more complex, so moving it into
a function would help.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/udp.c')
| -rw-r--r-- | net/ipv4/udp.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index eba790dcd16b..d8f527d15701 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -134,7 +134,7 @@ static inline int __udp_lib_lport_inuse(struct net *net, __u16 num, struct sock *sk; struct hlist_node *node; - sk_for_each(sk, node, &udptable[num & (UDP_HTABLE_SIZE - 1)]) + sk_for_each(sk, node, &udptable[udp_hashfn(num)]) if (net_eq(sock_net(sk), net) && sk->sk_hash == num) return 1; return 0; @@ -174,7 +174,7 @@ int udp_lib_get_port(struct sock *sk, unsigned short snum, for (i = 0; i < UDP_HTABLE_SIZE; i++) { int size = 0; - head = &udptable[rover & (UDP_HTABLE_SIZE - 1)]; + head = &udptable[udp_hashfn(rover)]; if (hlist_empty(head)) goto gotit; @@ -211,7 +211,7 @@ int udp_lib_get_port(struct sock *sk, unsigned short snum, gotit: snum = rover; } else { - head = &udptable[snum & (UDP_HTABLE_SIZE - 1)]; + head = &udptable[udp_hashfn(snum)]; sk_for_each(sk2, node, head) if (sk2->sk_hash == snum && @@ -227,7 +227,7 @@ gotit: inet_sk(sk)->num = snum; sk->sk_hash = snum; if (sk_unhashed(sk)) { - head = &udptable[snum & (UDP_HTABLE_SIZE - 1)]; + head = &udptable[udp_hashfn(snum)]; sk_add_node(sk, head); sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); } @@ -264,7 +264,7 @@ static struct sock *__udp4_lib_lookup(struct net *net, __be32 saddr, int badness = -1; read_lock(&udp_hash_lock); - sk_for_each(sk, node, &udptable[hnum & (UDP_HTABLE_SIZE - 1)]) { + sk_for_each(sk, node, &udptable[udp_hashfn(hnum)]) { struct inet_sock *inet = inet_sk(sk); if (net_eq(sock_net(sk), net) && sk->sk_hash == hnum && @@ -1068,7 +1068,7 @@ static int __udp4_lib_mcast_deliver(struct sk_buff *skb, int dif; read_lock(&udp_hash_lock); - sk = sk_head(&udptable[ntohs(uh->dest) & (UDP_HTABLE_SIZE - 1)]); + sk = sk_head(&udptable[udp_hashfn(ntohs(uh->dest))]); dif = skb->dev->ifindex; sk = udp_v4_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif); if (sk) { |