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| author | Pavel Emelyanov <xemul@openvz.org> | 2008-06-17 00:14:11 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-06-17 00:14:11 (GMT) |
| commit | 0b4419162aa6c4204843f3a13b48d9ab821d3167 (patch) | |
| tree | 1c475a8f59b7fce528eb97c6709b25145c110c33 /include/net/inet_sock.h | |
| parent | 33de014c63646f69f36f3673e3b4676f931dc878 (diff) | |
| download | linux-0b4419162aa6c4204843f3a13b48d9ab821d3167.tar.xz | |
netns: introduce the net_hash_mix "salt" for hashes
There are many possible ways to add this "salt", thus I made this
patch to be the last in the series to change it if required.
Currently I propose to use the struct net pointer itself as this
salt, but since this pointer is most often cache-line aligned, shift
this right to eliminate the bits, that are most often zeroed.
After this, simply add this mix to prepared hashfn-s.
For CONFIG_NET_NS=n case this salt is 0 and no changes in hashfn
appear.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/inet_sock.h')
| -rw-r--r-- | include/net/inet_sock.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h index 85bb420..643e26b 100644 --- a/include/net/inet_sock.h +++ b/include/net/inet_sock.h @@ -25,6 +25,7 @@ #include <net/sock.h> #include <net/request_sock.h> #include <net/route.h> +#include <net/netns/hash.h> /** struct ip_options - IP Options * @@ -178,7 +179,7 @@ static inline unsigned int inet_ehashfn(struct net *net, return jhash_3words((__force __u32) laddr, (__force __u32) faddr, ((__u32) lport) << 16 | (__force __u32)fport, - inet_ehash_secret); + inet_ehash_secret + net_hash_mix(net)); } static inline int inet_sk_ehashfn(const struct sock *sk) |