[pnfs] [PATCH 03/11] nfs41: NFSv4.1 callback support

[Ricardo Labiaga]

New callback members added to svc_serv. The NFSv4.1 callback service will
sleep on the svc_serv->svc_cb_waitq until new callback requests arrive.
The request will be queued in svc_serv->svc_cb_list. This patch adds this
list, the sleep queue and spinlock to svc_serv.

Signed-off-by: Ricardo Labiaga <ricardo.labiaga at netapp.com>
---
 include/linux/sunrpc/svc.h |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
index 8531a70..6f30de1 100644
--- a/include/linux/sunrpc/svc.h
+++ b/include/linux/sunrpc/svc.h
@@ -81,6 +81,16 @@ struct svc_serv {
 						 * adding threads */
 	svc_thread_fn		sv_function;	/* main function for threads */
 	int			sv_kill_signal;	/* signal to kill threads */
+#if defined(CONFIG_NFS_V4_1)
+	struct list_head 	sv_cb_list;	/* queue for callback requests
+						 * that arrive over the same
+						 * connection
+						 */
+	spinlock_t		sv_cb_lock;	/* protects the svc_cb_list */
+	wait_queue_head_t	sv_cb_waitq;	/* sleep here if there are no
+						 * entries in the svc_cb_list
+						 */
+#endif /* CONFIG_NFS_V4_1 */
 };
 
 /*
-- 
1.5.3.3