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From 6d23d16153f4fe9c01c9f2e02620ce324219b027 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Wed, 10 Oct 2018 20:08:39 +0100
Subject: [PATCH 08/49] tests/test-bdrv-drain: bdrv_drain_all() works in
 coroutines now

RH-Author: Kevin Wolf <kwolf@redhat.com>
Message-id: <20181010200843.6710-6-kwolf@redhat.com>
Patchwork-id: 82582
O-Subject: [RHEL-8 qemu-kvm PATCH 05/44] tests/test-bdrv-drain: bdrv_drain_all() works in coroutines now
Bugzilla: 1637976
RH-Acked-by: Max Reitz <mreitz@redhat.com>
RH-Acked-by: John Snow <jsnow@redhat.com>
RH-Acked-by: Thomas Huth <thuth@redhat.com>

Since we use bdrv_do_drained_begin/end() for bdrv_drain_all_begin/end(),
coroutine context is automatically left with a BH, preventing the
deadlocks that made bdrv_drain_all*() unsafe in coroutine context. Now
that we even removed the old polling code as dead code, it's obvious
that it's compatible now.

Enable the coroutine test cases for bdrv_drain_all().

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
(cherry picked from commit 6d0252f2f9cb49925deb1c41101462c9481dfc90)
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
 tests/test-bdrv-drain.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/tests/test-bdrv-drain.c b/tests/test-bdrv-drain.c
index f1276a1..f5d85c9 100644
--- a/tests/test-bdrv-drain.c
+++ b/tests/test-bdrv-drain.c
@@ -233,6 +233,11 @@ static void test_drv_cb_drain_subtree(void)
     test_drv_cb_common(BDRV_SUBTREE_DRAIN, true);
 }
 
+static void test_drv_cb_co_drain_all(void)
+{
+    call_in_coroutine(test_drv_cb_drain_all);
+}
+
 static void test_drv_cb_co_drain(void)
 {
     call_in_coroutine(test_drv_cb_drain);
@@ -289,6 +294,11 @@ static void test_quiesce_drain_subtree(void)
     test_quiesce_common(BDRV_SUBTREE_DRAIN, true);
 }
 
+static void test_quiesce_co_drain_all(void)
+{
+    call_in_coroutine(test_quiesce_drain_all);
+}
+
 static void test_quiesce_co_drain(void)
 {
     call_in_coroutine(test_quiesce_drain);
@@ -795,7 +805,8 @@ int main(int argc, char **argv)
     g_test_add_func("/bdrv-drain/driver-cb/drain_subtree",
                     test_drv_cb_drain_subtree);
 
-    // XXX bdrv_drain_all() doesn't work in coroutine context
+    g_test_add_func("/bdrv-drain/driver-cb/co/drain_all",
+                    test_drv_cb_co_drain_all);
     g_test_add_func("/bdrv-drain/driver-cb/co/drain", test_drv_cb_co_drain);
     g_test_add_func("/bdrv-drain/driver-cb/co/drain_subtree",
                     test_drv_cb_co_drain_subtree);
@@ -806,7 +817,8 @@ int main(int argc, char **argv)
     g_test_add_func("/bdrv-drain/quiesce/drain_subtree",
                     test_quiesce_drain_subtree);
 
-    // XXX bdrv_drain_all() doesn't work in coroutine context
+    g_test_add_func("/bdrv-drain/quiesce/co/drain_all",
+                    test_quiesce_co_drain_all);
     g_test_add_func("/bdrv-drain/quiesce/co/drain", test_quiesce_co_drain);
     g_test_add_func("/bdrv-drain/quiesce/co/drain_subtree",
                     test_quiesce_co_drain_subtree);
-- 
1.8.3.1