xfs: abstract block export operations from nfsd layouts

Instead of creeping pnfs layout configuration into filesystems, move the
definition of block-based export operations under a more abstract
configuration.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/fs/Kconfig b/fs/Kconfig
index b8fcb416be72..4d2f9210e748 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -67,6 +67,12 @@ config FS_POSIX_ACL
 config EXPORTFS
         tristate
 
+config EXPORTFS_BLOCK_OPS
+        bool "Enable filesystem export operations for block IO"
+        help
+          This option enables the export operations for a filesystem to support
+          external block IO.
+
 config FILE_LOCKING
         bool "Enable POSIX file locking API" if EXPERT
         default y