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SUNRPC: Add a new error code for retry waiting for another binder 

Add 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: another process is already in the middle of binding on this
transport (now returns -EAGAIN)

This change allows more specific retry processing for each of these two
cases.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2007-09-11 18:00:41 -04:00 committed by Trond Myklebust
parent 4784cb51a3
commit 2429cbf6a1
2 changed files with 7 additions and 1 deletions
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6
net/sunrpc/clnt.c
View File

@ -950,6 +950,12 @@ call_bind_status(struct rpc_task *task)
}
switch (task->tk_status) {
case -EAGAIN:
dprintk("RPC: %5u rpcbind waiting for another request "
"to finish\n", task->tk_pid);
/* avoid busy-waiting here -- could be a network outage. */
rpc_delay(task, 5*HZ);
goto retry_timeout;
case -EACCES:
dprintk("RPC: %5u remote rpcbind: RPC program/version "
"unavailable\n", task->tk_pid);

2
net/sunrpc/rpcb_clnt.c
View File

@ -341,7 +341,7 @@ void rpcb_getport_async(struct rpc_task *task)
BUG_ON(clnt->cl_parent != clnt);
if (xprt_test_and_set_binding(xprt)) {
status = -EACCES; /* tell caller to check again */
status = -EAGAIN; /* tell caller to check again */
dprintk("RPC: %5u %s: waiting for another binder\n",
task->tk_pid, __FUNCTION__);
goto bailout_nowake;