pnfs/flexfiles: Add the FlexFile Layout Driver

The flexfile layout is a new layout that extends the
file layout. It is currently being drafted as a specification at
https://datatracker.ietf.org/doc/draft-ietf-nfsv4-layout-types/

Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Signed-off-by: Tao Peng <bergwolf@primarydata.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/fs/nfs/Kconfig b/fs/nfs/Kconfig
index 3dece03f2fc8..c7abc10279af 100644
--- a/fs/nfs/Kconfig
+++ b/fs/nfs/Kconfig
@@ -128,6 +128,11 @@ config PNFS_OBJLAYOUT
         depends on NFS_V4_1 && SCSI_OSD_ULD
         default NFS_V4
 
+config PNFS_FLEXFILE_LAYOUT
+        tristate
+        depends on NFS_V4_1 && NFS_V3
+        default m
+
 config NFS_V4_1_IMPLEMENTATION_ID_DOMAIN
         string "NFSv4.1 Implementation ID Domain"
         depends on NFS_V4_1