Add hooks into the NFSv4 XDR code to make use of the new uid/gid

mapper upcall mechanism.

fs/nfs/nfs4proc.c

@@ -596,11 +596,13 @@ nfs4_do_open(struct inode *dir, struct qstr *name, int flags,
 		.name           = name,
 		.f_getattr      = &f_getattr,
 		.d_getattr      = &d_getattr,
+		.server         = server,
 	};
 	struct nfs_openres o_res = {
 		.cinfo          = &d_cinfo,
 		.f_getattr      = &f_getattr,
 		.d_getattr      = &d_getattr,
+		.server         = server,
 	};
 	struct rpc_message msg = {
 		.rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
@@ -685,9 +687,11 @@ nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
                 .fh             = fhandle,
                 .iap            = sattr,
                 .attr           = &getattr,
+		.server		= server,
         };
         struct nfs_setattrres  res = {
                 .attr           = &getattr,
+		.server		= server,
         };
         struct rpc_message msg = {
                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],

include/linux/nfs_xdr.h

@@ -105,6 +105,7 @@ struct nfs_openargs {
 	struct qstr *           name;
 	struct nfs4_getattr *   f_getattr;
 	struct nfs4_getattr *   d_getattr;
+	struct nfs_server *     server;	 /* Needed for ID mapping */
 };
 
 struct nfs_openres {
@@ -115,6 +116,7 @@ struct nfs_openres {
 	__u32                   rflags;
 	struct nfs4_getattr *   f_getattr;
 	struct nfs4_getattr *   d_getattr;
+	struct nfs_server *     server;
 };
 
 /*
@@ -248,10 +250,12 @@ struct nfs_setattrargs {
 	nfs4_stateid                    stateid;
 	struct iattr *                  iap;
 	struct nfs4_getattr *           attr;
+	struct nfs_server *             server; /* Needed for name mapping */
 };
 
 struct nfs_setattrres {
 	struct nfs4_getattr *           attr;
+	struct nfs_server *             server;
 };
 
 struct nfs_linkargs {