Merge tag 'nfs-for-3.13-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes:
 - Stable fix for data corruption when retransmitting O_DIRECT writes
 - Stable fix for a deep recursion/stack overflow bug in rpc_release_client
 - Stable fix for infinite looping when mounting a NFSv4.x volume
 - Fix a typo in the nfs mount option parser
 - Allow pNFS layouts to be compiled into the kernel when NFSv4.1 is

* tag 'nfs-for-3.13-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  nfs: fix pnfs Kconfig defaults
  NFS: correctly report misuse of "migration" mount option.
  nfs: don't retry detect_trunking with RPC_AUTH_UNIX more than once
  SUNRPC: Avoid deep recursion in rpc_release_client
  SUNRPC: Fix a data corruption issue when retransmitting RPC calls

fs/nfs/Kconfig

@@ -116,17 +116,17 @@ config NFS_V4_2
 config PNFS_FILE_LAYOUT
 	tristate
 	depends on NFS_V4_1
-	default m
+	default NFS_V4
 
 config PNFS_BLOCK
 	tristate
 	depends on NFS_V4_1 && BLK_DEV_DM
-	default m
+	default NFS_V4
 
 config PNFS_OBJLAYOUT
 	tristate
 	depends on NFS_V4_1 && SCSI_OSD_ULD
-	default m
+	default NFS_V4
 
 config NFS_V4_1_IMPLEMENTATION_ID_DOMAIN
 	string "NFSv4.1 Implementation ID Domain"

fs/nfs/nfs4state.c

@@ -2093,10 +2093,15 @@ again:
 			nfs4_root_machine_cred(clp);
 			goto again;
 		}
-		if (i > 2)
+		if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX)
 			break;
 	case -NFS4ERR_CLID_INUSE:
 	case -NFS4ERR_WRONGSEC:
+		/* No point in retrying if we already used RPC_AUTH_UNIX */
+		if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) {
+			status = -EPERM;
+			break;
+		}
 		clnt = rpc_clone_client_set_auth(clnt, RPC_AUTH_UNIX);
 		if (IS_ERR(clnt)) {
 			status = PTR_ERR(clnt);

fs/nfs/super.c

@@ -1614,7 +1614,7 @@ static int nfs_parse_mount_options(char *raw,
 		goto out_minorversion_mismatch;
 
 	if (mnt->options & NFS_OPTION_MIGRATION &&
-	    mnt->version != 4 && mnt->minorversion != 0)
+	    (mnt->version != 4 || mnt->minorversion != 0))
 		goto out_migration_misuse;
 
 	/*