NFS: make nfs_callback_tcpport6 per network context

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/callback.c

@@ -38,8 +38,6 @@ static struct nfs_callback_data nfs_callback_info[NFS4_MAX_MINOR_VERSION + 1];
 static DEFINE_MUTEX(nfs_callback_mutex);
 static struct svc_program nfs4_callback_program;
 
-unsigned short nfs_callback_tcpport6;
-
 static int nfs4_callback_up_net(struct svc_serv *serv, struct net *net)
 {
 	int ret;
@@ -56,9 +54,9 @@ static int nfs4_callback_up_net(struct svc_serv *serv, struct net *net)
 	ret = svc_create_xprt(serv, "tcp", net, PF_INET6,
 				nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS);
 	if (ret > 0) {
-		nfs_callback_tcpport6 = ret;
+		nn->nfs_callback_tcpport6 = ret;
 		dprintk("NFS: Callback listener port = %u (af %u, net %p)\n",
-				nfs_callback_tcpport6, PF_INET6, net);
+				nn->nfs_callback_tcpport6, PF_INET6, net);
 	} else if (ret != -EAFNOSUPPORT)
 		goto out_err;
 	return 0;

fs/nfs/callback.h

@@ -208,6 +208,5 @@ extern int nfs4_set_callback_sessionid(struct nfs_client *clp);
 #define NFS41_BC_MAX_CALLBACKS 1
 
 extern unsigned int nfs_callback_set_tcpport;
-extern unsigned short nfs_callback_tcpport6;
 
 #endif /* __LINUX_FS_NFS_CALLBACK_H */

fs/nfs/netns.h

@@ -23,6 +23,7 @@ struct nfs_net {
 #if IS_ENABLED(CONFIG_NFS_V4)
 	struct idr cb_ident_idr; /* Protected by nfs_client_lock */
 	unsigned short nfs_callback_tcpport;
+	unsigned short nfs_callback_tcpport6;
 #endif
 	spinlock_t nfs_client_lock;
 	struct timespec boot_time;

fs/nfs/nfs4state.c

@@ -80,7 +80,7 @@ int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred)
 		goto do_confirm;
 	port = nn->nfs_callback_tcpport;
 	if (clp->cl_addr.ss_family == AF_INET6)
-		port = nfs_callback_tcpport6;
+		port = nn->nfs_callback_tcpport6;
 
 	status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid);
 	if (status != 0)