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udp: introduce a udp_hashfn function

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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>
This commit is contained in:
Pavel Emelyanov
2008-06-16 17:11:50 -07:00
committed by David S. Miller
parent 942e7b102a
commit d6266281f8
3 changed files with 13 additions and 8 deletions
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5
include/linux/udp.h
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@@ -46,6 +46,11 @@ static inline struct udphdr *udp_hdr(const struct sk_buff *skb)
#define UDP_HTABLE_SIZE 128
static inline int udp_hashfn(const unsigned num)
{
return num & (UDP_HTABLE_SIZE - 1);
}
struct udp_sock {
/* inet_sock has to be the first member */
struct inet_sock inet;