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Commit 7a1218a2 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

SUNRPC: Ensure rpc_call_async() always calls tk_ops->rpc_release() 



Currently this will not happen if we exit before rpc_new_task() was called.
Also fix up rpc_run_task() to do the same (for consistency).

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 43ac3f29

fs/nfs/nfs4proc.c

+15 −17
Original line number Diff line number Diff line
@@ -605,11 +605,14 @@ static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 
	int status;



	atomic_inc(&data->count);

	/*

	 * If rpc_run_task() ends up calling ->rpc_release(), we

	 * want to ensure that it takes the 'error' code path.

	 */

	data->rpc_status = -ENOMEM;

	task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);

	if (IS_ERR(task)) {

		nfs4_opendata_free(data);

	if (IS_ERR(task))

		return PTR_ERR(task);

	}

	status = nfs4_wait_for_completion_rpc_task(task);

	if (status != 0) {

		data->cancelled = 1;
@@ -708,11 +711,14 @@ static int _nfs4_proc_open(struct nfs4_opendata *data) 
	int status;



	atomic_inc(&data->count);

	/*

	 * If rpc_run_task() ends up calling ->rpc_release(), we

	 * want to ensure that it takes the 'error' code path.

	 */

	data->rpc_status = -ENOMEM;

	task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);

	if (IS_ERR(task)) {

		nfs4_opendata_free(data);

	if (IS_ERR(task))

		return PTR_ERR(task);

	}

	status = nfs4_wait_for_completion_rpc_task(task);

	if (status != 0) {

		data->cancelled = 1;
@@ -2959,10 +2965,8 @@ static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, co 
	data->rpc_status = 0;



	task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);

	if (IS_ERR(task)) {

		nfs4_delegreturn_release(data);

	if (IS_ERR(task))

		return PTR_ERR(task);

	}

	status = nfs4_wait_for_completion_rpc_task(task);

	if (status == 0) {

		status = data->rpc_status;
@@ -3182,7 +3186,6 @@ static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 
		struct nfs_seqid *seqid)

{

	struct nfs4_unlockdata *data;

	struct rpc_task *task;



	data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);

	if (data == NULL) {
@@ -3192,10 +3195,7 @@ static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 


	/* Unlock _before_ we do the RPC call */

	do_vfs_lock(fl->fl_file, fl);

	task = rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);

	if (IS_ERR(task))

		nfs4_locku_release_calldata(data);

	return task;

	return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);

}



static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
@@ -3376,10 +3376,8 @@ static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *f 
		data->arg.reclaim = 1;

	task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,

			&nfs4_lock_ops, data);

	if (IS_ERR(task)) {

		nfs4_lock_release(data);

	if (IS_ERR(task))

		return PTR_ERR(task);

	}

	ret = nfs4_wait_for_completion_rpc_task(task);

	if (ret == 0) {

		ret = data->rpc_status;

net/sunrpc/clnt.c

+7 −3
Original line number Diff line number Diff line
@@ -495,15 +495,16 @@ rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg, int flags, 
	int		status;



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

	status = -EIO;

	if (clnt->cl_dead) 

		return -EIO;

		goto out_release;



	flags |= RPC_TASK_ASYNC;



	/* Create/initialize a new RPC task */

	status = -ENOMEM;

	if (!(task = rpc_new_task(clnt, flags, tk_ops, data)))

		goto out;

		goto out_release;



	/* Mask signals on GSS_AUTH upcalls */

	rpc_task_sigmask(task, &oldset);
@@ -518,7 +519,10 @@ rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg, int flags, 
		rpc_release_task(task);



	rpc_restore_sigmask(&oldset);		

out:

	return status;

out_release:

	if (tk_ops->rpc_release != NULL)

		tk_ops->rpc_release(data);

	return status;

}

net/sunrpc/sched.c

+4 −1
Original line number Diff line number Diff line
@@ -921,8 +921,11 @@ struct rpc_task *rpc_run_task(struct rpc_clnt *clnt, int flags, 
{

	struct rpc_task *task;

	task = rpc_new_task(clnt, flags, ops, data);

	if (task == NULL)

	if (task == NULL) {

		if (ops->rpc_release != NULL)

			ops->rpc_release(data);

		return ERR_PTR(-ENOMEM);

	}

	atomic_inc(&task->tk_count);

	rpc_execute(task);

	return task;