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authorChuck Lever <chuck.lever@oracle.com>2007-02-06 18:26:11 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2007-02-12 22:40:45 -0800
commit43d78ef2ba5bec26d0315859e8324bfc0be23766 (patch)
tree6ea576e0a20a11745c7a45b2a15dd855a45b655a /net/sunrpc/stats.c
parenta301b777714087ea1d63dbec0173a13d416cd7a9 (diff)
NFS: disconnect before retrying NFSv4 requests over TCP
RFC3530 section 3.1.1 states an NFSv4 client MUST NOT send a request twice on the same connection unless it is the NULL procedure. Section 3.1.1 suggests that the client should disconnect and reconnect if it wants to retry a request. Implement this by adding an rpc_clnt flag that an ULP can use to specify that the underlying transport should be disconnected on a major timeout. The NFSv4 client asserts this new flag, and requests no retries after a minor retransmit timeout. Note that disconnecting on a retransmit is in general not safe to do if the RPC client does not reuse the TCP port number when reconnecting. See http://bugzilla.linux-nfs.org/show_bug.cgi?id=6 Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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