diff mbox series

[82/97] libvhost-user: fix SLAVE_SEND_FD handling

Message ID 20191001234616.7825-83-mdroth@linux.vnet.ibm.com
State New
Headers show
Series Patch Round-up for stable 4.0.1, freeze on 2019-10-10 | expand

Commit Message

Michael Roth Oct. 1, 2019, 11:46 p.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

It doesn't look like this could possibly work properly since
VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD is defined to 10, but the
dev->protocol_features has a bitmap. I suppose the peer this
was tested with also supported VHOST_USER_PROTOCOL_F_LOG_SHMFD,
in which case the test would always be false, but nevertheless
the code seems wrong.

Use has_feature() to fix this.

Fixes: d84599f56c82 ("libvhost-user: support host notifier")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Message-Id: <20190903200422.11693-1-johannes@sipsolutions.net>
Reviewed-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 8726b70b449896f1211f869ec4f608904f027207)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 contrib/libvhost-user/libvhost-user.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/contrib/libvhost-user/libvhost-user.c b/contrib/libvhost-user/libvhost-user.c
index e08d6c7b97..516d0de7bb 100644
--- a/contrib/libvhost-user/libvhost-user.c
+++ b/contrib/libvhost-user/libvhost-user.c
@@ -1085,7 +1085,8 @@  bool vu_set_queue_host_notifier(VuDev *dev, VuVirtq *vq, int fd,
 
     vmsg.fd_num = fd_num;
 
-    if ((dev->protocol_features & VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD) == 0) {
+    if (!has_feature(dev->protocol_features,
+                     VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD)) {
         return false;
     }