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Commit 3b01c11e authored by Trond Myklebust's avatar Trond Myklebust Committed by Anna Schumaker
Browse files

NFSv4.x: Fix up the global tracking of the callback server 



Ensure that the nfs_callback_info[] array correctly tracks the
struct svc_serv.

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: default avatarAnna Schumaker <Anna.Schumaker@Netapp.com>
parent d0025268

fs/nfs/callback.c

+9 −5
Original line number Diff line number Diff line
@@ -201,7 +201,6 @@ static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt, 


	svc_sock_update_bufs(serv);



	cb_info->serv = serv;

	cb_info->rqst = rqstp;

	cb_info->task = kthread_create(serv->sv_ops->svo_function,

				    cb_info->rqst,
@@ -300,7 +299,7 @@ static struct svc_serv *nfs_callback_create_svc(int minorversion) 
	/*

	 * Check whether we're already up and running.

	 */

	if (cb_info->task) {

	if (cb_info->serv) {

		/*

		 * Note: increase service usage, because later in case of error

		 * svc_destroy() will be called.
@@ -333,6 +332,7 @@ static struct svc_serv *nfs_callback_create_svc(int minorversion) 
		printk(KERN_ERR "nfs_callback_create_svc: create service failed\n");

		return ERR_PTR(-ENOMEM);

	}

	cb_info->serv = serv;

	/* As there is only one thread we need to over-ride the

	 * default maximum of 80 connections

	 */
@@ -375,6 +375,8 @@ int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt) 
	 * thread exits.

	 */

err_net:

	if (!cb_info->users)

		cb_info->serv = NULL;

	svc_destroy(serv);

err_create:

	mutex_unlock(&nfs_callback_mutex);
@@ -396,9 +398,11 @@ void nfs_callback_down(int minorversion, struct net *net) 
	mutex_lock(&nfs_callback_mutex);

	nfs_callback_down_net(minorversion, cb_info->serv, net);

	cb_info->users--;

	if (cb_info->users == 0 && cb_info->task != NULL) {

	if (cb_info->users == 0) {

		if (cb_info->task != NULL) {

			kthread_stop(cb_info->task);

			dprintk("nfs_callback_down: service stopped\n");

		}

		svc_exit_thread(cb_info->rqst);

		dprintk("nfs_callback_down: service destroyed\n");

		cb_info->serv = NULL;