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Commit 848f1fe6 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

SUNRPC: Kill rpc_clnt->cl_dead 



Its use is at best racy, and there is only one user (lockd), which has
additional locking that makes the whole thing redundant.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 34f52e35

include/linux/sunrpc/clnt.h

+1 −2
Original line number Diff line number Diff line
@@ -45,8 +45,7 @@ struct rpc_clnt { 
				cl_intr     : 1,/* interruptible */

				cl_discrtry : 1,/* disconnect before retry */

				cl_autobind : 1,/* use getport() */

				cl_oneshot  : 1,/* dispose after use */

				cl_dead     : 1;/* abandoned */

				cl_oneshot  : 1;/* dispose after use */



	struct rpc_rtt *	cl_rtt;		/* RTO estimator data */

net/sunrpc/clnt.c

+3 −15
Original line number Diff line number Diff line
@@ -286,7 +286,6 @@ rpc_clone_client(struct rpc_clnt *clnt) 
	/* Turn off autobind on clones */

	new->cl_autobind = 0;

	new->cl_oneshot = 0;

	new->cl_dead = 0;

	INIT_LIST_HEAD(&new->cl_tasks);

	spin_lock_init(&new->cl_lock);

	rpc_init_rtt(&new->cl_rtt_default, clnt->cl_xprt->timeout.to_initval);
@@ -305,9 +304,8 @@ rpc_clone_client(struct rpc_clnt *clnt) 


/*

 * Properly shut down an RPC client, terminating all outstanding

 * requests. Note that we must be certain that cl_oneshot and

 * cl_dead are cleared, or else the client would be destroyed

 * when the last task releases it.

 * requests. Note that we must be certain that cl_oneshot is cleared,

 * or else the client would be destroyed when the last task releases it.

 */

int

rpc_shutdown_client(struct rpc_clnt *clnt)
@@ -318,7 +316,6 @@ rpc_shutdown_client(struct rpc_clnt *clnt) 
	while (!list_empty(&clnt->cl_tasks)) {

		/* Don't let rpc_release_client destroy us */

		clnt->cl_oneshot = 0;

		clnt->cl_dead = 0;

		rpc_killall_tasks(clnt);

		wait_event_timeout(destroy_wait,

			list_empty(&clnt->cl_tasks), 1*HZ);
@@ -369,7 +366,7 @@ rpc_release_client(struct rpc_clnt *clnt) 


	if (list_empty(&clnt->cl_tasks))

		wake_up(&destroy_wait);

	if (clnt->cl_oneshot || clnt->cl_dead)

	if (clnt->cl_oneshot)

		rpc_destroy_client(clnt);

	kref_put(&clnt->cl_kref, rpc_free_client);

}
@@ -483,10 +480,6 @@ int rpc_call_sync(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) 
	sigset_t	oldset;

	int		status;



	/* If this client is slain all further I/O fails */

	if (clnt->cl_dead)

		return -EIO;



	BUG_ON(flags & RPC_TASK_ASYNC);



	task = rpc_new_task(clnt, flags, &rpc_default_ops, NULL);
@@ -519,11 +512,6 @@ rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg, int flags, 
	sigset_t	oldset;

	int		status;



	/* If this client is slain all further I/O fails */

	status = -EIO;

	if (clnt->cl_dead)

		goto out_release;



	flags |= RPC_TASK_ASYNC;



	/* Create/initialize a new RPC task */