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| author | David S. Miller <davem@davemloft.net> | 2010-12-13 21:52:14 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-12-13 21:52:14 +0100 |
| commit | 0dbaee3b37e118a96bb7b8eb0d9bbaeeb46264be (patch) | |
| tree | 37000c5d7e663e4ae9800a7bcde9934984b8bae9 /net/ipv4/tcp_ipv4.c | |
| parent | net: change ip_default_ttl documentation (diff) | |
| download | linux-0dbaee3b37e118a96bb7b8eb0d9bbaeeb46264be.tar.xz linux-0dbaee3b37e118a96bb7b8eb0d9bbaeeb46264be.zip | |
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/ipv4/tcp_ipv4.c')
| -rw-r--r-- | net/ipv4/tcp_ipv4.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 4fc3387aa994..f4011027543d 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -1436,7 +1436,7 @@ struct sock *tcp_v4_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); if (tcp_sk(sk)->rx_opt.user_mss && tcp_sk(sk)->rx_opt.user_mss < newtp->advmss) newtp->advmss = tcp_sk(sk)->rx_opt.user_mss; |