diff mbox series

[PULL,30/29] vhost-user-blk-test: pass vhost-user socket fds to QSD

Message ID 20211019140622.738008-31-mst@redhat.com
State New
Headers show
Series [PULL,01/29] tests: acpi: dump table with failed checksum | expand

Commit Message

Michael S. Tsirkin Oct. 19, 2021, 2:08 p.m. UTC 
From: Stefan Hajnoczi <stefanha@redhat.com>

qemu-storage-daemon is launched with the vhost-user listen socket path.
The path is first unlinked before opening the listen socket. This
prevents stale UNIX domain socket files from stopping socket
initialization.

This behavior is undesirable in vhost-user-blk-test and the cause of a
bug:

There is a race condition in vhost-user-blk-test when QEMU launches
before QSD. It connects to the old socket that QSD unlinks and the
vhost-user connection is never serviced, resulting in a hang.

Pass the listen socket fd to QSD to maintain listen socket continuity
and prevent the lost connection.

Fixes: 806952026df41939680abe92b329715b9b4e01cc ("test: new qTest case to test the vhost-user-blk-server")
Cc: Raphael Norwitz <raphael.norwitz@nutanix.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Thomas Huth <thuth@redhat.com>
Cc: Coiby Xu <coiby.xu@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20211019135655.83067-1-stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 tests/qtest/vhost-user-blk-test.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/tests/qtest/vhost-user-blk-test.c b/tests/qtest/vhost-user-blk-test.c
index 6f108a1b62..62e670f39b 100644
--- a/tests/qtest/vhost-user-blk-test.c
+++ b/tests/qtest/vhost-user-blk-test.c
@@ -906,9 +906,9 @@  static void start_vhost_user_blk(GString *cmd_line, int vus_instances,
         img_path = drive_create();
         g_string_append_printf(storage_daemon_command,
             "--blockdev driver=file,node-name=disk%d,filename=%s "
-            "--export type=vhost-user-blk,id=disk%d,addr.type=unix,addr.path=%s,"
+            "--export type=vhost-user-blk,id=disk%d,addr.type=fd,addr.str=%d,"
             "node-name=disk%i,writable=on,num-queues=%d ",
-            i, img_path, i, sock_path, i, num_queues);
+            i, img_path, i, fd, i, num_queues);
 
         g_string_append_printf(cmd_line, "-chardev socket,id=char%d,path=%s ",
                                i + 1, sock_path);