nfsd4: clean up session allocation

Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>

fs/nfsd/nfs4state.c

@@ -758,7 +758,7 @@ static void nfsd4_put_drc_mem(int slotsize, int num)
 	spin_unlock(&nfsd_drc_lock);
 }
 
-static struct nfsd4_session *alloc_session(int slotsize, int numslots)
+static struct nfsd4_session *__alloc_session(int slotsize, int numslots)
 {
 	struct nfsd4_session *new;
 	int mem, i;
@@ -921,14 +921,10 @@ void nfsd4_put_session(struct nfsd4_session *ses)
 	spin_unlock(&client_lock);
 }
 
-static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses)
+static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan)
 {
 	struct nfsd4_session *new;
-	struct nfsd4_conn *conn;
-	struct nfsd4_channel_attrs *fchan = &cses->fore_channel;
 	int numslots, slotsize;
-	int idx;
-
 	/*
 	 * Note decreasing slot size below client's request may
 	 * make it difficult for client to function correctly, whereas
@@ -941,13 +937,30 @@ static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct n
 	if (numslots < 1)
 		return NULL;
 
-	new = alloc_session(slotsize, numslots);
+	new = __alloc_session(slotsize, numslots);
 	if (!new) {
 		nfsd4_put_drc_mem(slotsize, fchan->maxreqs);
 		return NULL;
 	}
 	init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize);
+	return new;
+}
 
+static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses)
+{
+	struct nfsd4_session *new;
+	struct nfsd4_conn *conn;
+	int idx;
+
+	new = alloc_session(&cses->fore_channel);
+	if (!new)
+		return NULL;
+
+	conn = alloc_conn_from_crses(rqstp, cses);
+	if (!conn) {
+		__free_session(new);
+		return NULL;
+	}
 	new->se_client = clp;
 	gen_sessionid(new);
 
@@ -965,11 +978,6 @@ static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct n
 	spin_unlock(&clp->cl_lock);
 	spin_unlock(&client_lock);
 
-	conn = alloc_conn_from_crses(rqstp, cses);
-	if (!conn) {
-		__free_session(new);
-		return NULL;
-	}
 	nfsd4_init_conn(rqstp, conn, new);
 	if (cses->flags & SESSION4_BACK_CHAN) {
 		struct sockaddr *sa = svc_addr(rqstp);