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Commit 5e7f37a7 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NLM/lockd: Add a reference counter to struct nlm_rqst 



When we replace the existing synchronous RPC calls with asynchronous calls,
the reference count will be needed in order to allow us to examine the
result of the RPC call.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 536ff0f8

fs/lockd/clntproc.c

+3 −0
Original line number Diff line number Diff line
@@ -221,6 +221,7 @@ struct nlm_rqst *nlm_alloc_call(struct nlm_host *host) 
	for(;;) {

		call = kzalloc(sizeof(*call), GFP_KERNEL);

		if (call != NULL) {

			atomic_set(&call->a_count, 1);

			locks_init_lock(&call->a_args.lock.fl);

			locks_init_lock(&call->a_res.lock.fl);

			call->a_host = host;
@@ -237,6 +238,8 @@ struct nlm_rqst *nlm_alloc_call(struct nlm_host *host) 


void nlm_release_call(struct nlm_rqst *call)

{

	if (!atomic_dec_and_test(&call->a_count))

		return;

	nlm_release_host(call->a_host);

	nlmclnt_release_lockargs(call);

	kfree(call);

include/linux/lockd/lockd.h

+1 −0
Original line number Diff line number Diff line
@@ -91,6 +91,7 @@ struct nlm_wait; 
 */

#define NLMCLNT_OHSIZE		((__NEW_UTS_LEN) + 10u)

struct nlm_rqst {

	atomic_t		a_count;

	unsigned int		a_flags;	/* initial RPC task flags */

	struct nlm_host *	a_host;		/* host handle */

	struct nlm_args		a_args;		/* arguments */