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tcp_metrics: Mix the network namespace into the hash function. 

In preparation for using one hash table for all network namespaces
mix the network namespace into the hash value.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman 2015-03-13 00:05:24 -05:00 committed by David S. Miller
parent 6493517eae
commit 3e5da62d0b
1 changed files with 5 additions and 0 deletions
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5
net/ipv4/tcp_metrics.c
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@ -252,6 +252,7 @@ static struct tcp_metrics_block *__tcp_get_metrics_req(struct request_sock *req,
}
net = dev_net(dst->dev);
hash ^= net_hash_mix(net);
hash = hash_32(hash, net->ipv4.tcp_metrics_hash_log);
for (tm = rcu_dereference(net->ipv4.tcp_metrics_hash[hash].chain); tm;
@ -299,6 +300,7 @@ static struct tcp_metrics_block *__tcp_get_metrics_tw(struct inet_timewait_sock
return NULL;
net = twsk_net(tw);
hash ^= net_hash_mix(net);
hash = hash_32(hash, net->ipv4.tcp_metrics_hash_log);
for (tm = rcu_dereference(net->ipv4.tcp_metrics_hash[hash].chain); tm;
@ -347,6 +349,7 @@ static struct tcp_metrics_block *tcp_get_metrics(struct sock *sk,
return NULL;
net = dev_net(dst->dev);
hash ^= net_hash_mix(net);
hash = hash_32(hash, net->ipv4.tcp_metrics_hash_log);
tm = __tcp_get_metrics(&saddr, &daddr, net, hash);
@ -994,6 +997,7 @@ static int tcp_metrics_nl_cmd_get(struct sk_buff *skb, struct genl_info *info)
if (!reply)
goto nla_put_failure;
hash ^= net_hash_mix(net);
hash = hash_32(hash, net->ipv4.tcp_metrics_hash_log);
ret = -ESRCH;
rcu_read_lock();
@ -1070,6 +1074,7 @@ static int tcp_metrics_nl_cmd_del(struct sk_buff *skb, struct genl_info *info)
if (ret < 0)
src = false;
hash ^= net_hash_mix(net);
hash = hash_32(hash, net->ipv4.tcp_metrics_hash_log);
hb = net->ipv4.tcp_metrics_hash + hash;
pp = &hb->chain;