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Commit 58f9612c authored by Trond Myklebust's avatar Trond Myklebust
Browse files

SUNRPC: Move remaining RPC client related task initialisation into clnt.c 



Now that rpc_run_task() is the sole entry point for RPC calls, we can move
the remaining rpc_client-related initialisation of struct rpc_task from
sched.c into clnt.c.

Also move rpc_killall_tasks() into the same file, since that too is
relative to the rpc_clnt.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent d9b6cd94

include/linux/sunrpc/clnt.h

+1 −0
Original line number Diff line number Diff line
@@ -131,6 +131,7 @@ struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *, 
struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);

void		rpc_shutdown_client(struct rpc_clnt *);

void		rpc_release_client(struct rpc_clnt *);

void		rpc_task_release_client(struct rpc_task *);



int		rpcb_register(u32, u32, int, unsigned short);

int		rpcb_v4_register(const u32 program, const u32 version,

net/sunrpc/clnt.c

+84 −0
Original line number Diff line number Diff line
@@ -413,6 +413,35 @@ out_no_clnt: 
}

EXPORT_SYMBOL_GPL(rpc_clone_client);



/*

 * Kill all tasks for the given client.

 * XXX: kill their descendants as well?

 */

void rpc_killall_tasks(struct rpc_clnt *clnt)

{

	struct rpc_task	*rovr;





	if (list_empty(&clnt->cl_tasks))

		return;

	dprintk("RPC:       killing all tasks for client %p\n", clnt);

	/*

	 * Spin lock all_tasks to prevent changes...

	 */

	spin_lock(&clnt->cl_lock);

	list_for_each_entry(rovr, &clnt->cl_tasks, tk_task) {

		if (!RPC_IS_ACTIVATED(rovr))

			continue;

		if (!(rovr->tk_flags & RPC_TASK_KILLED)) {

			rovr->tk_flags |= RPC_TASK_KILLED;

			rpc_exit(rovr, -EIO);

			rpc_wake_up_queued_task(rovr->tk_waitqueue, rovr);

		}

	}

	spin_unlock(&clnt->cl_lock);

}

EXPORT_SYMBOL_GPL(rpc_killall_tasks);



/*

 * Properly shut down an RPC client, terminating all outstanding

 * requests.
@@ -538,6 +567,49 @@ out: 
}

EXPORT_SYMBOL_GPL(rpc_bind_new_program);



void rpc_task_release_client(struct rpc_task *task)

{

	struct rpc_clnt *clnt = task->tk_client;



	if (clnt != NULL) {

		/* Remove from client task list */

		spin_lock(&clnt->cl_lock);

		list_del(&task->tk_task);

		spin_unlock(&clnt->cl_lock);

		task->tk_client = NULL;



		rpc_release_client(clnt);

	}

}



static

void rpc_task_set_client(struct rpc_task *task, struct rpc_clnt *clnt)

{

	if (clnt != NULL) {

		rpc_task_release_client(task);

		task->tk_client = clnt;

		kref_get(&clnt->cl_kref);

		if (clnt->cl_softrtry)

			task->tk_flags |= RPC_TASK_SOFT;

		/* Add to the client's list of all tasks */

		spin_lock(&clnt->cl_lock);

		list_add_tail(&task->tk_task, &clnt->cl_tasks);

		spin_unlock(&clnt->cl_lock);

	}

}



static void

rpc_task_set_rpc_message(struct rpc_task *task, const struct rpc_message *msg)

{

	if (msg != NULL) {

		task->tk_msg.rpc_proc = msg->rpc_proc;

		task->tk_msg.rpc_argp = msg->rpc_argp;

		task->tk_msg.rpc_resp = msg->rpc_resp;

		/* Bind the user cred */

		rpcauth_bindcred(task, msg->rpc_cred, task->tk_flags);

	}

}



/*

 * Default callback for async RPC calls

 */
@@ -562,6 +634,18 @@ struct rpc_task *rpc_run_task(const struct rpc_task_setup *task_setup_data) 
	if (IS_ERR(task))

		goto out;



	rpc_task_set_client(task, task_setup_data->rpc_client);

	rpc_task_set_rpc_message(task, task_setup_data->rpc_message);



	if (task->tk_status != 0) {

		int ret = task->tk_status;

		rpc_put_task(task);

		return ERR_PTR(ret);

	}



	if (task->tk_action == NULL)

		rpc_call_start(task);



	atomic_inc(&task->tk_count);

	rpc_execute(task);

out:

net/sunrpc/sched.c

+4 −73
Original line number Diff line number Diff line
@@ -246,17 +246,8 @@ static inline void rpc_task_set_debuginfo(struct rpc_task *task) 


static void rpc_set_active(struct rpc_task *task)

{

	struct rpc_clnt *clnt;

	if (test_and_set_bit(RPC_TASK_ACTIVE, &task->tk_runstate) != 0)

		return;

	rpc_task_set_debuginfo(task);

	/* Add to global list of all tasks */

	clnt = task->tk_client;

	if (clnt != NULL) {

		spin_lock(&clnt->cl_lock);

		list_add_tail(&task->tk_task, &clnt->cl_tasks);

		spin_unlock(&clnt->cl_lock);

	}

	set_bit(RPC_TASK_ACTIVE, &task->tk_runstate);

}



/*
@@ -319,11 +310,6 @@ static void __rpc_sleep_on(struct rpc_wait_queue *q, struct rpc_task *task, 
	dprintk("RPC: %5u sleep_on(queue \"%s\" time %lu)\n",

			task->tk_pid, rpc_qname(q), jiffies);



	if (!RPC_IS_ASYNC(task) && !RPC_IS_ACTIVATED(task)) {

		printk(KERN_ERR "RPC: Inactive synchronous task put to sleep!\n");

		return;

	}



	__rpc_add_wait_queue(q, task);



	BUG_ON(task->tk_callback != NULL);
@@ -334,8 +320,8 @@ static void __rpc_sleep_on(struct rpc_wait_queue *q, struct rpc_task *task, 
void rpc_sleep_on(struct rpc_wait_queue *q, struct rpc_task *task,

				rpc_action action)

{

	/* Mark the task as being activated if so needed */

	rpc_set_active(task);

	/* We shouldn't ever put an inactive task to sleep */

	BUG_ON(!RPC_IS_ACTIVATED(task));



	/*

	 * Protect the queue operations.
@@ -807,26 +793,9 @@ static void rpc_init_task(struct rpc_task *task, const struct rpc_task_setup *ta 
	/* Initialize workqueue for async tasks */

	task->tk_workqueue = task_setup_data->workqueue;



	task->tk_client = task_setup_data->rpc_client;

	if (task->tk_client != NULL) {

		kref_get(&task->tk_client->cl_kref);

		if (task->tk_client->cl_softrtry)

			task->tk_flags |= RPC_TASK_SOFT;

	}



	if (task->tk_ops->rpc_call_prepare != NULL)

		task->tk_action = rpc_prepare_task;



	if (task_setup_data->rpc_message != NULL) {

		task->tk_msg.rpc_proc = task_setup_data->rpc_message->rpc_proc;

		task->tk_msg.rpc_argp = task_setup_data->rpc_message->rpc_argp;

		task->tk_msg.rpc_resp = task_setup_data->rpc_message->rpc_resp;

		/* Bind the user cred */

		rpcauth_bindcred(task, task_setup_data->rpc_message->rpc_cred, task_setup_data->flags);

		if (task->tk_action == NULL)

			rpc_call_start(task);

	}



	/* starting timestamp */

	task->tk_start = ktime_get();
@@ -896,10 +865,7 @@ void rpc_put_task(struct rpc_task *task) 
		xprt_release(task);

	if (task->tk_msg.rpc_cred)

		rpcauth_unbindcred(task);

	if (task->tk_client) {

		rpc_release_client(task->tk_client);

		task->tk_client = NULL;

	}

	rpc_task_release_client(task);

	if (task->tk_workqueue != NULL) {

		INIT_WORK(&task->u.tk_work, rpc_async_release);

		queue_work(task->tk_workqueue, &task->u.tk_work);
@@ -912,13 +878,6 @@ static void rpc_release_task(struct rpc_task *task) 
{

	dprintk("RPC: %5u release task\n", task->tk_pid);



	if (!list_empty(&task->tk_task)) {

		struct rpc_clnt *clnt = task->tk_client;

		/* Remove from client task list */

		spin_lock(&clnt->cl_lock);

		list_del(&task->tk_task);

		spin_unlock(&clnt->cl_lock);

	}

	BUG_ON (RPC_IS_QUEUED(task));



	/* Wake up anyone who is waiting for task completion */
@@ -927,34 +886,6 @@ static void rpc_release_task(struct rpc_task *task) 
	rpc_put_task(task);

}



/*

 * Kill all tasks for the given client.

 * XXX: kill their descendants as well?

 */

void rpc_killall_tasks(struct rpc_clnt *clnt)

{

	struct rpc_task	*rovr;





	if (list_empty(&clnt->cl_tasks))

		return;

	dprintk("RPC:       killing all tasks for client %p\n", clnt);

	/*

	 * Spin lock all_tasks to prevent changes...

	 */

	spin_lock(&clnt->cl_lock);

	list_for_each_entry(rovr, &clnt->cl_tasks, tk_task) {

		if (! RPC_IS_ACTIVATED(rovr))

			continue;

		if (!(rovr->tk_flags & RPC_TASK_KILLED)) {

			rovr->tk_flags |= RPC_TASK_KILLED;

			rpc_exit(rovr, -EIO);

		}

	}

	spin_unlock(&clnt->cl_lock);

}

EXPORT_SYMBOL_GPL(rpc_killall_tasks);



int rpciod_up(void)

{

	return try_module_get(THIS_MODULE) ? 0 : -EINVAL;