SUNRPC: Split another new rpcbind retry error code from EACCES

Add more new error code processing to the kernel's rpcbind client
and to call_bind_status() to distinguish two cases:

Case 1: the remote has replied that the program/version tuple is not
registered (returns EACCES)

Case 2: retry with a lesser rpcbind version (rpcb now returns EPFNOSUPPORT)

This change allows more specific error processing for each of these two
cases.  We now fail case 2 instead of retrying... it's a server
configuration error not to support even rpcbind version 2.  And don't
expose this new error code to user land -- convert it to EIO before
failing the RPC.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c
index 9b06a217ab86..d7b9f02489e6 100644
--- a/net/sunrpc/rpcb_clnt.c
+++ b/net/sunrpc/rpcb_clnt.c
@@ -377,7 +377,7 @@ void rpcb_getport_async(struct rpc_task *task)
         }
         if (info[xprt->bind_index].rpc_proc == NULL) {
                 xprt->bind_index = 0;
-                status = -EACCES;       /* tell caller to try again later */
+                status = -EPFNOSUPPORT;
                 dprintk("RPC: %5u %s: no more getport versions available\n",
                         task->tk_pid, __FUNCTION__);
                 goto bailout_nofree;