From: Miklos Szeredi <mszeredi@redhat.com>
Date: Mon, 27 Jan 2020 19:01:46 +0000
Subject: [PATCH] virtiofsd: passthrough_ll: disable readdirplus on cache=never
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...because the attributes sent in the READDIRPLUS reply would be discarded
anyway.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
(cherry picked from commit ddcbabcb0ea177be3ec3500726b699c7c26ffd93)
---
 tools/virtiofsd/passthrough_ll.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
index 18d69abcbc..6480c517dc 100644
--- a/tools/virtiofsd/passthrough_ll.c
+++ b/tools/virtiofsd/passthrough_ll.c
@@ -478,6 +478,10 @@ static void lo_init(void *userdata, struct fuse_conn_info *conn)
         fuse_log(FUSE_LOG_DEBUG, "lo_init: activating flock locks\n");
         conn->want |= FUSE_CAP_FLOCK_LOCKS;
     }
+    if (lo->cache == CACHE_NEVER) {
+        fuse_log(FUSE_LOG_DEBUG, "lo_init: disabling readdirplus\n");
+        conn->want &= ~FUSE_CAP_READDIRPLUS;
+    }
 }
 
 static void lo_getattr(fuse_req_t req, fuse_ino_t ino,