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NFSv4.1: Try to deal with NFS4ERR_SEQ_MISORDERED. 

If the server returns NFS4ERR_SEQ_MISORDERED, it could be a sign
that the slot was retired at some point. Retry the attempt after
reinitialising the slot sequence number to 1.

Also add a handler for NFS4ERR_SEQ_FALSE_RETRY. Just bump the slot
sequence number and retry...

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2012-12-15 13:56:18 -05:00
parent 65a0c14954
commit e879444084
1 changed files with 19 additions and 5 deletions
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24
fs/nfs/nfs4proc.c
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@ -467,11 +467,19 @@ static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *
* The slot id we used was probably retired. Try again * The slot id we used was probably retired. Try again
* using a different slot id. * using a different slot id.
*/ */
if (rpc_restart_call_prepare(task)) { goto retry_nowait;
task->tk_status = 0; case -NFS4ERR_SEQ_MISORDERED:
ret = 0; /*
} * Could this slot have been previously retired?
break; * If so, then the server may be expecting seq_nr = 1!
*/
if (slot->seq_nr == 1)
break;
slot->seq_nr = 1;
goto retry_nowait;
case -NFS4ERR_SEQ_FALSE_RETRY:
++slot->seq_nr;
goto retry_nowait;
default: default:
/* Just update the slot sequence no. */ /* Just update the slot sequence no. */
++slot->seq_nr; ++slot->seq_nr;
@ -481,6 +489,12 @@ out:
dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
nfs41_sequence_free_slot(res); nfs41_sequence_free_slot(res);
return ret; return ret;
retry_nowait:
if (rpc_restart_call_prepare(task)) {
task->tk_status = 0;
ret = 0;
}
goto out;
out_retry: out_retry:
if (!rpc_restart_call(task)) if (!rpc_restart_call(task))
goto out; goto out;