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From 8e6473e906dfc7d2a62abaf1ec80ff461e4d201d Mon Sep 17 00:00:00 2001
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Date: Mon, 27 Jan 2020 19:02:12 +0100
Subject: [PATCH 101/116] virtiofsd: do not always set FUSE_FLOCK_LOCKS
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RH-Author: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-id: <20200127190227.40942-98-dgilbert@redhat.com>
Patchwork-id: 93551
O-Subject: [RHEL-AV-8.2 qemu-kvm PATCH 097/112] virtiofsd: do not always set FUSE_FLOCK_LOCKS
Bugzilla: 1694164
RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Sergio Lopez Pascual <slp@redhat.com>

From: Peng Tao <tao.peng@linux.alibaba.com>

Right now we always enable it regardless of given commandlines.
Fix it by setting the flag relying on the lo->flock bit.

Signed-off-by: Peng Tao <tao.peng@linux.alibaba.com>
Reviewed-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
Reviewed-by: Sergio Lopez <slp@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
(cherry picked from commit e468d4af5f5192ab33283464a9f6933044ce47f7)
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 tools/virtiofsd/passthrough_ll.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
index ab16135..ccbbec1 100644
--- a/tools/virtiofsd/passthrough_ll.c
+++ b/tools/virtiofsd/passthrough_ll.c
@@ -546,9 +546,14 @@ static void lo_init(void *userdata, struct fuse_conn_info *conn)
         fuse_log(FUSE_LOG_DEBUG, "lo_init: activating writeback\n");
         conn->want |= FUSE_CAP_WRITEBACK_CACHE;
     }
-    if (lo->flock && conn->capable & FUSE_CAP_FLOCK_LOCKS) {
-        fuse_log(FUSE_LOG_DEBUG, "lo_init: activating flock locks\n");
-        conn->want |= FUSE_CAP_FLOCK_LOCKS;
+    if (conn->capable & FUSE_CAP_FLOCK_LOCKS) {
+        if (lo->flock) {
+            fuse_log(FUSE_LOG_DEBUG, "lo_init: activating flock locks\n");
+            conn->want |= FUSE_CAP_FLOCK_LOCKS;
+        } else {
+            fuse_log(FUSE_LOG_DEBUG, "lo_init: disabling flock locks\n");
+            conn->want &= ~FUSE_CAP_FLOCK_LOCKS;
+        }
     }
 
     if (conn->capable & FUSE_CAP_POSIX_LOCKS) {
-- 
1.8.3.1