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Commit e300a63c authored by J. Bruce Fields's avatar J. Bruce Fields
Browse files

nfsd4: replace callback thread by asynchronous rpc 



We don't really need a synchronous rpc, and moving to an asynchronous
rpc allows us to do without this extra kthread.

Signed-off-by: default avatarJ. Bruce Fields <bfields@citi.umich.edu>
parent 3cef9ab2

fs/nfsd/nfs4callback.c

+22 −16
Original line number Diff line number Diff line
@@ -415,6 +415,21 @@ static void warn_no_callback_path(struct nfs4_client *clp, int reason) 
		(int)clp->cl_name.len, clp->cl_name.data, reason);

}



static void nfsd4_cb_probe_done(struct rpc_task *task, void *calldata)

{

	struct nfs4_client *clp = calldata;



	if (task->tk_status)

		warn_no_callback_path(clp, task->tk_status);

	else

		atomic_set(&clp->cl_callback.cb_set, 1);

	put_nfs4_client(clp);

}



static const struct rpc_call_ops nfsd4_cb_probe_ops = {

	.rpc_call_done = nfsd4_cb_probe_done,

};



static struct rpc_cred *lookup_cb_cred(struct nfs4_callback *cb)

{

	struct auth_cred acred = {
@@ -431,9 +446,8 @@ static struct rpc_cred *lookup_cb_cred(struct nfs4_callback *cb) 
							RPCAUTH_LOOKUP_NEW);

}



static int do_probe_callback(void *data)

void do_probe_callback(struct nfs4_client *clp)

{

	struct nfs4_client *clp = data;

	struct nfs4_callback    *cb = &clp->cl_callback;

	struct rpc_message msg = {

		.rpc_proc       = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL],
@@ -449,15 +463,13 @@ static int do_probe_callback(void *data) 
	}

	cb->cb_cred = cred;

	msg.rpc_cred = cb->cb_cred;

	status = rpc_call_sync(cb->cb_client, &msg, RPC_TASK_SOFT);

	status = rpc_call_async(cb->cb_client, &msg, RPC_TASK_SOFT,

				&nfsd4_cb_probe_ops, (void *)clp);

out:

	if (status)

	if (status) {

		warn_no_callback_path(clp, status);

	else

		atomic_set(&cb->cb_set, 1);



		put_nfs4_client(clp);

	return 0;

	}

}



/*
@@ -466,7 +478,6 @@ static int do_probe_callback(void *data) 
void

nfsd4_probe_callback(struct nfs4_client *clp)

{

	struct task_struct *t;

	int status;



	BUG_ON(atomic_read(&clp->cl_callback.cb_set));
@@ -480,12 +491,7 @@ nfsd4_probe_callback(struct nfs4_client *clp) 
	/* the task holds a reference to the nfs4_client struct */

	atomic_inc(&clp->cl_count);



	t = kthread_run(do_probe_callback, clp, "nfs4_cb_probe");



	if (IS_ERR(t))

		atomic_dec(&clp->cl_count);



	return;

	do_probe_callback(clp);

}



/*