[Virtio-fs] [PATCH v6 4/7] fuse: negotiate per-file DAX in FUSE_INIT

[Jeffle Xu]

Among the FUSE_INIT phase, client shall advertise per-file DAX if it's
mounted with "-o dax=inode". Then server is aware that client is in
per-file DAX mode, and will construct per-inode DAX attribute
accordingly.

Signed-off-by: Jeffle Xu <jefflexu at linux.alibaba.com>
---
 fs/fuse/inode.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index b4b41683e97e..f4ad99e2415b 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -1203,6 +1203,8 @@ void fuse_send_init(struct fuse_mount *fm)
 #ifdef CONFIG_FUSE_DAX
 	if (fm->fc->dax)
 		ia->in.flags |= FUSE_MAP_ALIGNMENT;
+	if (fm->fc->dax_mode == FUSE_DAX_INODE)
+		ia->in.flags |= FUSE_PERFILE_DAX;
 #endif
 	if (fm->fc->auto_submounts)
 		ia->in.flags |= FUSE_SUBMOUNTS;
-- 
2.27.0