diff options
| author | Martin KaFai Lau | 2017-12-01 21:52:30 +0100 |
|---|---|---|
| committer | David S. Miller | 2017-12-03 16:18:28 +0100 |
| commit | f0b1e64c1331dd8a2f0c30fcd0838db6cb406098 (patch) | |
| tree | 6ce059baf578caa9114dfaa6951a242004eca20f /include/net/ipv6.h | |
| parent | inet: Add a count to struct inet_listen_hashbucket (diff) | |
| download | kernel-qcow2-linux-f0b1e64c1331dd8a2f0c30fcd0838db6cb406098.tar.gz kernel-qcow2-linux-f0b1e64c1331dd8a2f0c30fcd0838db6cb406098.tar.xz kernel-qcow2-linux-f0b1e64c1331dd8a2f0c30fcd0838db6cb406098.zip | |
udp: Move udp[46]_portaddr_hash() to net/ip[v6].h
This patch moves the udp[46]_portaddr_hash()
to net/ip[v6].h. The function name is renamed to
ipv[46]_portaddr_hash().
It will be used by a later patch which adds a second listener
hashtable hashed by the address and port.
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/ipv6.h')
| -rw-r--r-- | include/net/ipv6.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/net/ipv6.h b/include/net/ipv6.h index f73797e2fa60..25be4715578c 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -22,6 +22,7 @@ #include <net/flow.h> #include <net/flow_dissector.h> #include <net/snmp.h> +#include <net/netns/hash.h> #define SIN6_LEN_RFC2133 24 @@ -673,6 +674,22 @@ static inline bool ipv6_addr_v4mapped(const struct in6_addr *a) cpu_to_be32(0x0000ffff))) == 0UL; } +static inline u32 ipv6_portaddr_hash(const struct net *net, + const struct in6_addr *addr6, + unsigned int port) +{ + unsigned int hash, mix = net_hash_mix(net); + + if (ipv6_addr_any(addr6)) + hash = jhash_1word(0, mix); + else if (ipv6_addr_v4mapped(addr6)) + hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix); + else + hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix); + + return hash ^ port; +} + /* * Check for a RFC 4843 ORCHID address * (Overlay Routable Cryptographic Hash Identifiers) |