From a6e1e0fb6c7c7e87a21069716fbad2ab4292f0cc Mon Sep 17 00:00:00 2001
From: Sebastien Boeuf <sebastien.boeuf@intel.com>
Date: Thu, 11 Mar 2021 19:18:13 +0100
Subject: [PATCH] lib: Set reply_ack based on acked protocol features

In case VHOST_USER_PROTOCOL_F_REPLY_ACK has been negotiated, the reply
ack must be explicitly set on the SlaveFsCacheReq handler.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
---
 src/lib.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 05673db..321054b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -873,6 +873,10 @@ impl<S: VhostUserBackend> VhostUserSlaveReqHandlerMut for VhostUserHandler<S> {
     }
 
     fn set_slave_req_fd(&mut self, vu_req: SlaveFsCacheReq) {
+        if self.acked_protocol_features & VhostUserProtocolFeatures::REPLY_ACK.bits() != 0 {
+            vu_req.set_reply_ack_flag(true);
+        }
+
         self.backend.write().unwrap().set_slave_req_fd(vu_req);
     }
 }