linux-kernel - [PATCH 5/6] LockD: service start function introduced

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Date:	Wed, 25 Apr 2012 18:23:09 +0400
From:	Stanislav Kinsbursky <skinsbursky@...allels.com>
To:	bfields@...ldses.org, Trond.Myklebust@...app.com
Cc:	linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org,
	devel@...nvz.org
Subject: [PATCH 5/6] LockD: service start function introduced

This is just a code move, which from my POW makes code looks better.
I.e. now on start we have 3 different stages:
1) Service creation.
2) Service per-net data allocation.
3) Service start.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@...allels.com>

---
 fs/lockd/svc.c |   67 +++++++++++++++++++++++++++++++++++---------------------
 1 files changed, 42 insertions(+), 25 deletions(-)

diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 53cd69e..b47bf77 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -291,6 +291,46 @@ static void lockd_down_net(struct svc_serv *serv, struct net *net)
 	}
 }
 
+static int lockd_start_svc(struct svc_serv *serv)
+{
+	int error;
+
+	if (nlmsvc_rqst)
+		return 0;
+
+	/*
+	 * Create the kernel thread and wait for it to start.
+	 */
+	nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE);
+	if (IS_ERR(nlmsvc_rqst)) {
+		error = PTR_ERR(nlmsvc_rqst);
+		printk(KERN_WARNING
+			"lockd_up: svc_rqst allocation failed, error=%d\n",
+			error);
+		goto out_rqst;
+	}
+
+	svc_sock_update_bufs(serv);
+	serv->sv_maxconn = nlm_max_connections;
+
+	nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, serv->sv_name);
+	if (IS_ERR(nlmsvc_task)) {
+		error = PTR_ERR(nlmsvc_task);
+		printk(KERN_WARNING
+			"lockd_up: kthread_run failed, error=%d\n", error);
+		goto out_task;
+	}
+	dprintk("lockd_up: service started\n");
+	return 0;
+
+out_task:
+	svc_exit_thread(nlmsvc_rqst);
+	nlmsvc_task = NULL;
+out_rqst:
+	nlmsvc_rqst = NULL;
+	return error;
+}
+
 static struct svc_serv *lockd_create_svc(void)
 {
 	struct svc_serv *serv;
@@ -343,32 +383,9 @@ int lockd_up(struct net *net)
 	if (error < 0)
 		goto err_net;
 
-	/*
-	 * Create the kernel thread and wait for it to start.
-	 */
-	nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE);
-	if (IS_ERR(nlmsvc_rqst)) {
-		error = PTR_ERR(nlmsvc_rqst);
-		nlmsvc_rqst = NULL;
-		printk(KERN_WARNING
-			"lockd_up: svc_rqst allocation failed, error=%d\n",
-			error);
-		goto err_start;
-	}
-
-	svc_sock_update_bufs(serv);
-	serv->sv_maxconn = nlm_max_connections;
-
-	nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, serv->sv_name);
-	if (IS_ERR(nlmsvc_task)) {
-		error = PTR_ERR(nlmsvc_task);
-		svc_exit_thread(nlmsvc_rqst);
-		nlmsvc_task = NULL;
-		nlmsvc_rqst = NULL;
-		printk(KERN_WARNING
-			"lockd_up: kthread_run failed, error=%d\n", error);
+	error = lockd_start_svc(serv);
+	if (error < 0)
 		goto err_start;
-	}
 
 	nlmsvc_users++;
 	/*

--
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