Commit a8a4ae3a authored by Andy Adamson's avatar Andy Adamson Committed by Trond Myklebust
Browse files

NFSv41: Resend on NFS4ERR_RETRY_UNCACHED_REP 



Free the slot and resend the RPC with new session <slot#,seq#>.

For nfs4_async_handle_error, return -EAGAIN and set the task->tk_status to 0
to restart the async rpc in the rpc_restart_call_prepare state which resets
the slot.

For nfs4_handle_exception, retrying a call that uses nfs4_call_sync will
reset the slot via nfs41_call_sync_prepare.

For open/close/lock/locku/delegreturn/layoutcommit/unlink/rename/write
cachethis is true, so these operations will not trigger an
NFS4ERR_RETRY_UNCACHED_REP.

Signed-off-by: default avatarAndy Adamson <andros@netapp.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 9f381a61

fs/nfs/nfs4filelayout.c

+2 −0
Original line number Diff line number Diff line
@@ -117,6 +117,8 @@ static int filelayout_async_handle_error(struct rpc_task *task, 
	case -EKEYEXPIRED:

		rpc_delay(task, FILELAYOUT_POLL_RETRY_MAX);

		break;

	case -NFS4ERR_RETRY_UNCACHED_REP:

		break;

	default:

		dprintk("%s DS error. Retry through MDS %d\n", __func__,

			task->tk_status);

fs/nfs/nfs4proc.c

+6 −0
Original line number Diff line number Diff line
@@ -300,6 +300,7 @@ static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struc 
			ret = nfs4_delay(server->client, &exception->timeout);

			if (ret != 0)

				break;

		case -NFS4ERR_RETRY_UNCACHED_REP:

		case -NFS4ERR_OLD_STATEID:

			exception->retry = 1;

			break;
@@ -3695,6 +3696,7 @@ nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, 
			rpc_delay(task, NFS4_POLL_RETRY_MAX);

			task->tk_status = 0;

			return -EAGAIN;

		case -NFS4ERR_RETRY_UNCACHED_REP:

		case -NFS4ERR_OLD_STATEID:

			task->tk_status = 0;

			return -EAGAIN;
@@ -4844,6 +4846,8 @@ static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 
		dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);

		rpc_delay(task, NFS4_POLL_RETRY_MIN);

		task->tk_status = 0;

		/* fall through */

	case -NFS4ERR_RETRY_UNCACHED_REP:

		nfs_restart_rpc(task, data->clp);

		return;

	}
@@ -5479,6 +5483,8 @@ static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nf 
		break;

	case -NFS4ERR_DELAY:

		rpc_delay(task, NFS4_POLL_RETRY_MAX);

		/* fall through */

	case -NFS4ERR_RETRY_UNCACHED_REP:

		return -EAGAIN;

	default:

		nfs4_schedule_lease_recovery(clp);

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