ipv4: Add helper inet_csk_update_pmtu().
authorDavid S. Miller <davem@davemloft.net>
Mon, 16 Jul 2012 10:28:06 +0000 (03:28 -0700)
committerDavid S. Miller <davem@davemloft.net>
Mon, 16 Jul 2012 10:28:06 +0000 (03:28 -0700)
commit80d0a69fc57715dc9080c0567df1ed911b78abea
treefeb310b5075d3a4f118fcdde7bc44970b1c3f07e
parent141e369de698f2e17bf716b83fcc647ddcb2220c
ipv4: Add helper inet_csk_update_pmtu().

This abstracts away the call to dst_ops->update_pmtu() so that we can
transparently handle the fact that, in the future, the dst itself can
be invalidated by the PMTU update (when we have non-host routes cached
in sockets).

So we try to rebuild the socket cached route after the method
invocation if necessary.

This isn't used by SCTP because it needs to cache dsts per-transport,
and thus will need it's own local version of this helper.

Signed-off-by: David S. Miller <davem@davemloft.net>
include/net/inet_connection_sock.h
net/dccp/ipv4.c
net/ipv4/inet_connection_sock.c
net/ipv4/tcp_ipv4.c