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authorDavid S. Miller <davem@davemloft.net>2012-06-10 09:04:12 +0200
committerDavid S. Miller <davem@davemloft.net>2012-06-11 11:08:59 +0200
commit46517008e1168dc926cf2c47d529efc07eca85c0 (patch)
tree98e9cf1917c9b8f1c6c2d8121746fd4f8e414f45 /net/rxrpc
parentinet: Hide route peer accesses behind helpers. (diff)
downloadlinux-46517008e1168dc926cf2c47d529efc07eca85c0.tar.xz
linux-46517008e1168dc926cf2c47d529efc07eca85c0.zip
ipv4: Kill ip_rt_frag_needed().
There is zero point to this function. It's only real substance is to perform an extremely outdated BSD4.2 ICMP check, which we can safely remove. If you really have a MTU limited link being routed by a BSD4.2 derived system, here's a nickel go buy yourself a real router. The other actions of ip_rt_frag_needed(), checking and conditionally updating the peer, are done by the per-protocol handlers of the ICMP event. TCP, UDP, et al. have a handler which will receive this event and transmit it back into the associated route via dst_ops->update_pmtu(). This simplification is important, because it eliminates the one place where we do not have a proper route context in which to make an inetpeer lookup. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rxrpc')
-rw-r--r--net/rxrpc/ar-error.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/net/rxrpc/ar-error.c b/net/rxrpc/ar-error.c
index 5d6b572a6704..a9206087b4d7 100644
--- a/net/rxrpc/ar-error.c
+++ b/net/rxrpc/ar-error.c
@@ -81,10 +81,6 @@ void rxrpc_UDP_error_report(struct sock *sk)
_net("I/F MTU %u", mtu);
}
- /* ip_rt_frag_needed() may have eaten the info */
- if (mtu == 0)
- mtu = ntohs(icmp_hdr(skb)->un.frag.mtu);
-
if (mtu == 0) {
/* they didn't give us a size, estimate one */
if (mtu > 1500) {