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authorMartin KaFai Lau <kafai@fb.com>2017-12-01 23:52:30 +0300
committerDavid S. Miller <davem@davemloft.net>2017-12-03 18:18:28 +0300
commitf0b1e64c1331dd8a2f0c30fcd0838db6cb406098 (patch)
tree6ce059baf578caa9114dfaa6951a242004eca20f /net/ipv6/udp.c
parent76d013b20ba9a5f88eee7c90ac82cbc3ee64be18 (diff)
downloadlinux-f0b1e64c1331dd8a2f0c30fcd0838db6cb406098.tar.xz
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 'net/ipv6/udp.c')
-rw-r--r--net/ipv6/udp.c32
1 files changed, 8 insertions, 24 deletions
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index c9f91c28b81d..eecf9f0faf29 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -89,28 +89,12 @@ static u32 udp6_ehashfn(const struct net *net,
udp_ipv6_hash_secret + net_hash_mix(net));
}
-static u32 udp6_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;
-}
-
int udp_v6_get_port(struct sock *sk, unsigned short snum)
{
unsigned int hash2_nulladdr =
- udp6_portaddr_hash(sock_net(sk), &in6addr_any, snum);
+ ipv6_portaddr_hash(sock_net(sk), &in6addr_any, snum);
unsigned int hash2_partial =
- udp6_portaddr_hash(sock_net(sk), &sk->sk_v6_rcv_saddr, 0);
+ ipv6_portaddr_hash(sock_net(sk), &sk->sk_v6_rcv_saddr, 0);
/* precompute partial secondary hash */
udp_sk(sk)->udp_portaddr_hash = hash2_partial;
@@ -119,7 +103,7 @@ int udp_v6_get_port(struct sock *sk, unsigned short snum)
static void udp_v6_rehash(struct sock *sk)
{
- u16 new_hash = udp6_portaddr_hash(sock_net(sk),
+ u16 new_hash = ipv6_portaddr_hash(sock_net(sk),
&sk->sk_v6_rcv_saddr,
inet_sk(sk)->inet_num);
@@ -225,7 +209,7 @@ struct sock *__udp6_lib_lookup(struct net *net,
u32 hash = 0;
if (hslot->count > 10) {
- hash2 = udp6_portaddr_hash(net, daddr, hnum);
+ hash2 = ipv6_portaddr_hash(net, daddr, hnum);
slot2 = hash2 & udptable->mask;
hslot2 = &udptable->hash2[slot2];
if (hslot->count < hslot2->count)
@@ -236,7 +220,7 @@ struct sock *__udp6_lib_lookup(struct net *net,
hslot2, skb);
if (!result) {
unsigned int old_slot2 = slot2;
- hash2 = udp6_portaddr_hash(net, &in6addr_any, hnum);
+ hash2 = ipv6_portaddr_hash(net, &in6addr_any, hnum);
slot2 = hash2 & udptable->mask;
/* avoid searching the same slot again. */
if (unlikely(slot2 == old_slot2))
@@ -705,9 +689,9 @@ static int __udp6_lib_mcast_deliver(struct net *net, struct sk_buff *skb,
struct sk_buff *nskb;
if (use_hash2) {
- hash2_any = udp6_portaddr_hash(net, &in6addr_any, hnum) &
+ hash2_any = ipv6_portaddr_hash(net, &in6addr_any, hnum) &
udptable->mask;
- hash2 = udp6_portaddr_hash(net, daddr, hnum) & udptable->mask;
+ hash2 = ipv6_portaddr_hash(net, daddr, hnum) & udptable->mask;
start_lookup:
hslot = &udptable->hash2[hash2];
offset = offsetof(typeof(*sk), __sk_common.skc_portaddr_node);
@@ -895,7 +879,7 @@ static struct sock *__udp6_lib_demux_lookup(struct net *net,
int dif, int sdif)
{
unsigned short hnum = ntohs(loc_port);
- unsigned int hash2 = udp6_portaddr_hash(net, loc_addr, hnum);
+ unsigned int hash2 = ipv6_portaddr_hash(net, loc_addr, hnum);
unsigned int slot2 = hash2 & udp_table.mask;
struct udp_hslot *hslot2 = &udp_table.hash2[slot2];
const __portpair ports = INET_COMBINED_PORTS(rmt_port, hnum);