tree 3fdb86f69ea598163f7096e1f85fd8f5c86bb896
parent e946217e4fdaa67681bbabfa8e6b18641921f750
author Trond Myklebust <Trond.Myklebust@netapp.com> 1225221699 -0400
committer Trond Myklebust <Trond.Myklebust@netapp.com> 1225221699 -0400

SUNRPC: Respond promptly to server TCP resets

If the server sends us an RST error while we're in the TCP_ESTABLISHED
state, then that will not result in a state change, and so the RPC client
ends up hanging forever (see
http://bugzilla.kernel.org/show_bug.cgi?id=11154)

We can intercept the reset by setting up an sk->sk_error_report callback,
which will then allow us to initiate a proper shutdown and retry...

We also make sure that if the send request receives an ECONNRESET, then we
shutdown too...

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>