nfs41: create a svc_xprt for nfs41 callback thread and use for incoming callbacks

Signed-off-by: Benny Halevy <bhalevy@panasas.com>

2 files changed, 17 insertions, 1 deletions

diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 470928898063..37815f3216aa 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -185,16 +185,31 @@ nfs41_callback_svc(void *vrqstp)
 struct svc_rqst *
 nfs41_callback_up(struct svc_serv *serv, struct rpc_xprt *xprt)
 {
+        struct svc_xprt *bc_xprt;
+        struct svc_rqst *rqstp = ERR_PTR(-ENOMEM);
+
+        dprintk("--> %s\n", __func__);
+        /* Create a svc_sock for the service */
+        bc_xprt = svc_sock_create(serv, xprt->prot);
+        if (!bc_xprt)
+                goto out;
+
         /*
          * Save the svc_serv in the transport so that it can
          * be referenced when the session backchannel is initialized
          */
+        serv->bc_xprt = bc_xprt;
         xprt->bc_serv = serv;
 
         INIT_LIST_HEAD(&serv->sv_cb_list);
         spin_lock_init(&serv->sv_cb_lock);
         init_waitqueue_head(&serv->sv_cb_waitq);
-        return svc_prepare_thread(serv, &serv->sv_pools[0]);
+        rqstp = svc_prepare_thread(serv, &serv->sv_pools[0]);
+        if (IS_ERR(rqstp))
+                svc_sock_destroy(bc_xprt);
+out:
+        dprintk("--> %s return %p\n", __func__, rqstp);
+        return rqstp;
 }
 
 static inline int nfs_minorversion_callback_svc_setup(u32 minorversion,
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index b35048fabe22..6b90ce439c00 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -1258,6 +1258,7 @@ bc_svc_process(struct svc_serv *serv, struct rpc_rqst *req,
         int             error;
 
         /* Build the svc_rqst used by the common processing routine */
+        rqstp->rq_xprt = serv->bc_xprt;
         rqstp->rq_xid = req->rq_xid;
         rqstp->rq_prot = req->rq_xprt->prot;
         rqstp->rq_server = serv;