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Commit 03e51d32 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

SUNRPC: Check whether the task was transmitted before rebind/reconnect 



Before initiating transport actions that require putting the task to sleep,
such as rebinding or reconnecting, we should check whether or not the task
was already transmitted.

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
parent 6b5f5900

net/sunrpc/clnt.c

+40 −4
Original line number Diff line number Diff line
@@ -1811,6 +1811,24 @@ call_encode(struct rpc_task *task) 
		task->tk_action = call_connect;

}



/*

 * Helpers to check if the task was already transmitted, and

 * to take action when that is the case.

 */

static bool

rpc_task_transmitted(struct rpc_task *task)

{

	return !test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate);

}



static void

rpc_task_handle_transmitted(struct rpc_task *task)

{

	xprt_end_transmit(task);

	task->tk_action = call_transmit_status;

	call_transmit_status(task);

}



/*

 * 4.	Get the server port number if not yet set

 */
@@ -1819,6 +1837,11 @@ call_bind(struct rpc_task *task) 
{

	struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt;



	if (rpc_task_transmitted(task)) {

		rpc_task_handle_transmitted(task);

		return;

	}



	dprint_status(task);



	task->tk_action = call_connect;
@@ -1837,6 +1860,11 @@ call_bind_status(struct rpc_task *task) 
{

	int status = -EIO;



	if (rpc_task_transmitted(task)) {

		rpc_task_handle_transmitted(task);

		return;

	}



	if (task->tk_status >= 0) {

		dprint_status(task);

		task->tk_status = 0;
@@ -1916,6 +1944,11 @@ call_connect(struct rpc_task *task) 
{

	struct rpc_xprt *xprt = task->tk_rqstp->rq_xprt;



	if (rpc_task_transmitted(task)) {

		rpc_task_handle_transmitted(task);

		return;

	}



	dprintk("RPC: %5u call_connect xprt %p %s connected\n",

			task->tk_pid, xprt,

			(xprt_connected(xprt) ? "is" : "is not"));
@@ -1942,10 +1975,8 @@ call_connect_status(struct rpc_task *task) 
	struct rpc_clnt *clnt = task->tk_client;

	int status = task->tk_status;



	/* Check if the task was already transmitted */

	if (!test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) {

		xprt_end_transmit(task);

		task->tk_action = call_transmit_status;

	if (rpc_task_transmitted(task)) {

		rpc_task_handle_transmitted(task);

		return;

	}
@@ -2001,6 +2032,11 @@ call_connect_status(struct rpc_task *task) 
static void

call_transmit(struct rpc_task *task)

{

	if (rpc_task_transmitted(task)) {

		rpc_task_handle_transmitted(task);

		return;

	}



	dprint_status(task);



	task->tk_action = call_transmit_status;