linux-kernel - [PATCH v2 08/16] sunrpc: set up workqueue function in svc

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Date:	Wed, 10 Dec 2014 14:07:52 -0500
From:	Jeff Layton <jlayton@...marydata.com>
To:	bfields@...ldses.org
Cc:	linux-kernel@...r.kernel.org, linux-nfs@...r.kernel.org,
	Tejun Heo <tj@...nel.org>, Al Viro <viro@...iv.linux.org.uk>,
	NeilBrown <neilb@...e.de>
Subject: [PATCH v2 08/16] sunrpc: set up workqueue function in svc_xprt

For workqueue-based services we'll want to queue a workqueue job
whenever a xprt needs to be serviced. Add a work_struct to svc_xprt
and initialize it from a new work_func_t field in the svc_serv_ops.

Signed-off-by: Jeff Layton <jlayton@...marydata.com>
---
 include/linux/sunrpc/svc.h      | 3 +++
 include/linux/sunrpc/svc_xprt.h | 1 +
 net/sunrpc/svc.c                | 2 +-
 net/sunrpc/svc_xprt.c           | 2 ++
 4 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
index 3d2113222dda..8bd53f723485 100644
--- a/include/linux/sunrpc/svc.h
+++ b/include/linux/sunrpc/svc.h
@@ -58,6 +58,9 @@ struct svc_serv_ops {
 	/* function for service threads to run */
 	int		(*svo_function)(void *);
 
+	/* xprt work function */
+	work_func_t	svo_xprt_work;
+
 	/* queue up a transport for servicing */
 	void		(*svo_enqueue_xprt)(struct svc_xprt *);
 
diff --git a/include/linux/sunrpc/svc_xprt.h b/include/linux/sunrpc/svc_xprt.h
index 78512cfe1fe6..096937871cda 100644
--- a/include/linux/sunrpc/svc_xprt.h
+++ b/include/linux/sunrpc/svc_xprt.h
@@ -53,6 +53,7 @@ struct svc_xprt {
 	struct kref		xpt_ref;
 	struct list_head	xpt_list;
 	struct list_head	xpt_ready;
+	struct work_struct	xpt_work;
 	unsigned long		xpt_flags;
 #define	XPT_BUSY	0		/* enqueued/receiving */
 #define	XPT_CONN	1		/* conn pending */
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 165fa1803a0a..135ffbe9d983 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -34,7 +34,7 @@
 
 static void svc_unregister(const struct svc_serv *serv, struct net *net);
 
-#define svc_serv_is_pooled(serv)    ((serv)->sv_ops->svo_function)
+#define svc_serv_is_pooled(serv)    ((serv)->sv_ops->svo_function || (serv)->sv_ops->svo_xprt_work)
 
 #define SVC_POOL_DEFAULT	SVC_POOL_GLOBAL
 
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 4954339315b7..63b42a8578c0 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -157,6 +157,8 @@ void svc_xprt_init(struct net *net, struct svc_xprt_class *xcl,
 	xprt->xpt_ops = xcl->xcl_ops;
 	kref_init(&xprt->xpt_ref);
 	xprt->xpt_server = serv;
+	if (serv->sv_ops->svo_xprt_work)
+		INIT_WORK(&xprt->xpt_work, serv->sv_ops->svo_xprt_work);
 	INIT_LIST_HEAD(&xprt->xpt_list);
 	INIT_LIST_HEAD(&xprt->xpt_ready);
 	INIT_LIST_HEAD(&xprt->xpt_deferred);
-- 
2.1.0

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