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authorDavid S. Miller <davem@davemloft.net>2010-12-13 12:52:14 -0800
committerDavid S. Miller <davem@davemloft.net>2010-12-13 12:52:14 -0800
commit0dbaee3b37e118a96bb7b8eb0d9bbaeeb46264be (patch)
tree37000c5d7e663e4ae9800a7bcde9934984b8bae9 /net/ipv6/tcp_ipv6.c
parentcc6f02dd490dac4ad821d5077b934c9b37037cd0 (diff)
downloadop-kernel-dev-0dbaee3b37e118a96bb7b8eb0d9bbaeeb46264be.zip
op-kernel-dev-0dbaee3b37e118a96bb7b8eb0d9bbaeeb46264be.tar.gz
net: Abstract default ADVMSS behind an accessor.
Make all RTAX_ADVMSS metric accesses go through a new helper function, dst_metric_advmss(). Leave the actual default metric as "zero" in the real metric slot, and compute the actual default value dynamically via a new dst_ops AF specific callback. For stacked IPSEC routes, we use the advmss of the path which preserves existing behavior. Unlike ipv4/ipv6, DecNET ties the advmss to the mtu and thus updates advmss on pmtu updates. This inconsistency in advmss handling results in more raw metric accesses than I wish we ended up with. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/tcp_ipv6.c')
-rw-r--r--net/ipv6/tcp_ipv6.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index fee0768..20aa95e 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1521,7 +1521,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
tcp_mtup_init(newsk);
tcp_sync_mss(newsk, dst_mtu(dst));
- newtp->advmss = dst_metric(dst, RTAX_ADVMSS);
+ newtp->advmss = dst_metric_advmss(dst);
tcp_initialize_rcv_mss(newsk);
newinet->inet_daddr = newinet->inet_saddr = LOOPBACK4_IPV6;
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