Expand the fuse protocol to support per inode DAX.
FUSE_HAS_INODE_DAX flag is added indicating if fuse server/client
supporting per inode DAX. It can be conveyed in both FUSE_INIT request
and reply.
FUSE_ATTR_DAX flag is added indicating if DAX shall be enabled for
corresponding file. It is conveyed in FUSE_LOOKUP reply.
Signed-off-by: Jeffle Xu <jefflexu@xxxxxxxxxxxxxxxxx>
---
include/uapi/linux/fuse.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h
index a1dc3ee1d17c..63a9a963f4d9 100644
--- a/include/uapi/linux/fuse.h
+++ b/include/uapi/linux/fuse.h
@@ -187,6 +187,7 @@
*
* 7.35
* - add FOPEN_NOFLUSH
+ * - add FUSE_HAS_INODE_DAX, FUSE_ATTR_DAX
*/
#ifndef _LINUX_FUSE_H
@@ -341,6 +342,7 @@ struct fuse_file_lock {
* write/truncate sgid is killed only if file has group
* execute permission. (Same as Linux VFS behavior).
* FUSE_SETXATTR_EXT: Server supports extended struct fuse_setxattr_in
+ * FUSE_HAS_INODE_DAX: use per inode DAX
*/
#define FUSE_ASYNC_READ (1 << 0)
#define FUSE_POSIX_LOCKS (1 << 1)
@@ -372,6 +374,7 @@ struct fuse_file_lock {
#define FUSE_SUBMOUNTS (1 << 27)
#define FUSE_HANDLE_KILLPRIV_V2 (1 << 28)
#define FUSE_SETXATTR_EXT (1 << 29)
+#define FUSE_HAS_INODE_DAX (1 << 30)
/**
* CUSE INIT request/reply flags
@@ -454,8 +457,10 @@ 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 inode DAX mode
*/
#define FUSE_ATTR_SUBMOUNT (1 << 0)
+#define FUSE_ATTR_DAX (1 << 1)
/**
* Open flags
--
2.27.0
