nfs41: allow LD to choose DS connection version/minor_version

flexfile layout may need to set such when making DS connections.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>

fs/nfs/filelayout/filelayoutdev.c

@@ -278,7 +278,8 @@ nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx)
 		goto out_test_devid;
 
 	nfs4_pnfs_ds_connect(s, ds, devid, dataserver_timeo,
-			     dataserver_retrans,
+			     dataserver_retrans, 4,
+			     s->nfs_client->cl_minorversion,
 			     s->nfs_client->cl_rpcclient->cl_auth->au_flavor);
 
 out_test_devid:

fs/nfs/internal.h

@@ -190,6 +190,7 @@ extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
 					     int ds_addrlen, int ds_proto,
 					     unsigned int ds_timeo,
 					     unsigned int ds_retrans,
+					     u32 minor_version,
 					     rpc_authflavor_t au_flavor);
 extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
 						struct inode *);

fs/nfs/nfs4client.c

@@ -850,14 +850,14 @@ static int nfs4_set_client(struct nfs_server *server,
 struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
 		const struct sockaddr *ds_addr, int ds_addrlen,
 		int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans,
-		rpc_authflavor_t au_flavor)
+		u32 minor_version, rpc_authflavor_t au_flavor)
 {
 	struct nfs_client_initdata cl_init = {
 		.addr = ds_addr,
 		.addrlen = ds_addrlen,
 		.nfs_mod = &nfs_v4,
 		.proto = ds_proto,
-		.minorversion = mds_clp->cl_minorversion,
+		.minorversion = minor_version,
 		.net = mds_clp->cl_net,
 	};
 	struct rpc_timeout ds_timeout;

fs/nfs/pnfs.h

@@ -325,7 +325,8 @@ struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs,
 				      gfp_t gfp_flags);
 void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
 			  struct nfs4_deviceid_node *devid, unsigned int timeo,
-			  unsigned int retrans, rpc_authflavor_t au_flavor);
+			  unsigned int retrans, u32 versoin, u32 minor_version,
+			  rpc_authflavor_t au_flavor);
 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
 						 struct xdr_stream *xdr,
 						 gfp_t gfp_flags);

fs/nfs/pnfs_nfs.c

@@ -554,6 +554,7 @@ static int _nfs4_pnfs_ds_connect(struct nfs_server *mds_srv,
 				 struct nfs4_pnfs_ds *ds,
 				 unsigned int timeo,
 				 unsigned int retrans,
+				 u32 minor_version,
 				 rpc_authflavor_t au_flavor)
 {
 	struct nfs_client *clp = ERR_PTR(-EIO);
@@ -570,7 +571,8 @@ static int _nfs4_pnfs_ds_connect(struct nfs_server *mds_srv,
 		clp = nfs4_set_ds_client(mds_srv->nfs_client,
 					(struct sockaddr *)&da->da_addr,
 					da->da_addrlen, IPPROTO_TCP,
-					timeo, retrans, au_flavor);
+					timeo, retrans, minor_version,
+					au_flavor);
 		if (!IS_ERR(clp))
 			break;
 	}
@@ -601,13 +603,14 @@ static int _nfs4_pnfs_ds_connect(struct nfs_server *mds_srv,
  */
 void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
 			  struct nfs4_deviceid_node *devid, unsigned int timeo,
-			  unsigned int retrans, rpc_authflavor_t au_flavor)
+			  unsigned int retrans, u32 version,
+			  u32 minor_version, rpc_authflavor_t au_flavor)
 {
 	if (test_and_set_bit(NFS4DS_CONNECTING, &ds->ds_state) == 0) {
 		int err = 0;
 
-		err = _nfs4_pnfs_ds_connect(mds_srv, ds, timeo,
-					    retrans, au_flavor);
+		err = _nfs4_pnfs_ds_connect(mds_srv, ds, timeo, retrans,
+					    minor_version, au_flavor);
 		if (err)
 			nfs4_mark_deviceid_unavailable(devid);
 		nfs4_clear_ds_conn_bit(ds);