NFS: Get suppattr_exclcreat when getting server capabilities

Create file with attributs as NFS4_CREATE_EXCLUSIVE4_1 mode
depends on suppattr_exclcreat attribut.

v3, same as v2.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index 20bc8e5..570a7df 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -173,6 +173,11 @@
 						   set of attributes supported
 						   on this filesystem excluding
 						   the label support bit. */
+	u32			exclcreat_bitmask[3];
+						/* V4 bitmask representing the
+						   set of attributes supported
+						   on this filesystem for the
+						   exclusive create. */
 	u32			cache_consistency_bitmask[3];
 						/* V4 bitmask representing the subset
 						   of change attribute, size, ctime