[Virtio-fs] [PATCH][RFC] viriofsd: do not fall back to buffer io when cache=auto

[piaojun]

Direct io flags will be tured off even if cache=auto, which seems a
little bit strange. It's better to keep the open flags set by user. If
I missed the discussion about this issue, please let me know, thanks.

Signed-off-by: Jun Piao <piaojun at huawei.com>
---
 contrib/virtiofsd/passthrough_ll.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/contrib/virtiofsd/passthrough_ll.c b/contrib/virtiofsd/passthrough_ll.c
index 321bbb2..a080f0d 100644
--- a/contrib/virtiofsd/passthrough_ll.c
+++ b/contrib/virtiofsd/passthrough_ll.c
@@ -1687,6 +1687,8 @@ static void lo_create(fuse_req_t req, fuse_ino_t parent, const char *name,
 		fi->direct_io = 1;
 	else if (lo->cache == CACHE_ALWAYS)
 		fi->keep_cache = 1;
+	else
+		fi->direct_io = !!(fi->flags & O_DIRECT);

 out:
 	lo_inode_put(lo, &parent_inode);
@@ -1899,6 +1901,8 @@ static void lo_open(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
 		fi->direct_io = 1;
 	else if (lo->cache == CACHE_ALWAYS)
 		fi->keep_cache = 1;
+	else
+		fi->direct_io = !!(fi->flags & O_DIRECT);
 	fuse_reply_open(req, fi);
 }

--