[Virtio-fs] [PATCH v5 3/5] fuse: support per-file DAX

[Jeffle Xu]

Expand the fuse protocol to support per-file DAX.

FUSE_ATTR_DAX flag is added indicating if DAX shall be enabled for
corresponding file when replying FUSE_LOOKUP request.

Signed-off-by: Jeffle Xu <jefflexu at linux.alibaba.com>
---
 include/uapi/linux/fuse.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h
index 36ed092227fa..88dc24512124 100644
--- a/include/uapi/linux/fuse.h
+++ b/include/uapi/linux/fuse.h
@@ -184,6 +184,9 @@
  *
  *  7.34
  *  - add FUSE_SYNCFS
+ *
+ *  7.35
+ *  - add FUSE_ATTR_DAX
  */
 
 #ifndef _LINUX_FUSE_H
@@ -219,7 +222,7 @@
 #define FUSE_KERNEL_VERSION 7
 
 /** Minor version number of this interface */
-#define FUSE_KERNEL_MINOR_VERSION 34
+#define FUSE_KERNEL_MINOR_VERSION 35
 
 /** The node ID of the root inode */
 #define FUSE_ROOT_ID 1
@@ -449,8 +452,10 @@ struct fuse_file_lock {
  * fuse_attr flags
  *
  * FUSE_ATTR_SUBMOUNT: Object is a submount root
+ * FUSE_ATTR_DAX: Enable DAX for this file in per-file DAX mode
  */
 #define FUSE_ATTR_SUBMOUNT      (1 << 0)
+#define FUSE_ATTR_DAX		(1 << 1)
 
 /**
  * Open flags
-- 
2.27.0