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Commit 4c402b40 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

SUNRPC: Remove rpc_clnt->cl_count 



The kref now does most of what cl_count + cl_user used to do. The only
remaining role for cl_count is to tell us if we are in a 'shutdown'
phase. We can provide that information using a single bit field instead
of a full atomic counter.

Also rename rpc_destroy_client() to rpc_close_client(), which reflects
better what its role is these days.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 8ad7c892

include/linux/sunrpc/clnt.h

+1 −3
Original line number Diff line number Diff line
@@ -25,7 +25,6 @@ struct rpc_inode; 
 */

struct rpc_clnt {

	struct kref		cl_kref;	/* Number of references */

	atomic_t		cl_count;	/* Number of clones */

	struct list_head	cl_clients;	/* Global list of clients */

	struct list_head	cl_tasks;	/* List of tasks */

	spinlock_t		cl_lock;	/* spinlock */
@@ -119,8 +118,7 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args); 
struct rpc_clnt	*rpc_bind_new_program(struct rpc_clnt *,

				struct rpc_program *, int);

struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);

int		rpc_shutdown_client(struct rpc_clnt *);

int		rpc_destroy_client(struct rpc_clnt *);

void		rpc_shutdown_client(struct rpc_clnt *);

void		rpc_release_client(struct rpc_clnt *);

void		rpc_register_client(struct rpc_clnt *);

void		rpc_unregister_client(struct rpc_clnt *);

net/sunrpc/clnt.c

+2 −17
Original line number Diff line number Diff line
@@ -121,7 +121,6 @@ static struct rpc_clnt * rpc_new_client(struct rpc_xprt *xprt, char *servname, s 
	clnt = kzalloc(sizeof(*clnt), GFP_KERNEL);

	if (!clnt)

		goto out_err;

	atomic_set(&clnt->cl_count, 1);

	clnt->cl_parent = clnt;



	clnt->cl_server = clnt->cl_inline_name;
@@ -270,7 +269,6 @@ rpc_clone_client(struct rpc_clnt *clnt) 
	new = kmemdup(clnt, sizeof(*new), GFP_KERNEL);

	if (!new)

		goto out_no_clnt;

	atomic_set(&new->cl_count, 1);

	new->cl_metrics = rpc_alloc_iostats(clnt);

	if (new->cl_metrics == NULL)

		goto out_no_stats;
@@ -303,8 +301,7 @@ rpc_clone_client(struct rpc_clnt *clnt) 
 * Properly shut down an RPC client, terminating all outstanding

 * requests.

 */

int

rpc_shutdown_client(struct rpc_clnt *clnt)

void rpc_shutdown_client(struct rpc_clnt *clnt)

{

	dprintk("RPC:       shutting down %s client for %s\n",

			clnt->cl_protname, clnt->cl_server);
@@ -315,7 +312,7 @@ rpc_shutdown_client(struct rpc_clnt *clnt) 
			list_empty(&clnt->cl_tasks), 1*HZ);

	}



	return rpc_destroy_client(clnt);

	rpc_release_client(clnt);

}



/*
@@ -363,18 +360,6 @@ rpc_release_client(struct rpc_clnt *clnt) 
	kref_put(&clnt->cl_kref, rpc_free_client);

}



/*

 * Delete an RPC client

 */

int

rpc_destroy_client(struct rpc_clnt *clnt)

{

	if (!atomic_dec_and_test(&clnt->cl_count))

		return 1;

	kref_put(&clnt->cl_kref, rpc_free_client);

	return 0;

}



/**

 * rpc_bind_new_program - bind a new RPC program to an existing client

 * @old - old rpc_client

net/sunrpc/rpcb_clnt.c

+1 −1
Original line number Diff line number Diff line
@@ -380,7 +380,7 @@ void rpcb_getport(struct rpc_task *task) 
	}



	child = rpc_run_task(rpcb_clnt, RPC_TASK_ASYNC, &rpcb_getport_ops, map);

	rpc_destroy_client(rpcb_clnt);

	rpc_release_client(rpcb_clnt);

	if (IS_ERR(child)) {

		status = -EIO;

		dprintk("RPC: %5u rpcb_getport rpc_run_task failed\n",

net/sunrpc/sunrpc_syms.c

+0 −1
Original line number Diff line number Diff line
@@ -35,7 +35,6 @@ EXPORT_SYMBOL(rpc_wake_up_status); 
/* RPC client functions */

EXPORT_SYMBOL(rpc_clone_client);

EXPORT_SYMBOL(rpc_bind_new_program);

EXPORT_SYMBOL(rpc_destroy_client);

EXPORT_SYMBOL(rpc_shutdown_client);

EXPORT_SYMBOL(rpc_killall_tasks);

EXPORT_SYMBOL(rpc_call_sync);