nfs: add LAYOUT_TYPE_MAX enum value

This gives us a nice upper bound for later use in nfѕd.

Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index 022b761..8a3589c 100644 (file)
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -516,6 +516,7 @@ enum pnfs_layouttype {
        LAYOUT_NFSV4_1_FILES  = 1,
        LAYOUT_OSD2_OBJECTS = 2,
        LAYOUT_BLOCK_VOLUME = 3,
+       LAYOUT_TYPE_MAX
 };
 
 /* used for both layout return and recall */