From 784ce8c1c23db1b654e85804e6d19508429ce5b5 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Wed, 10 Oct 2018 20:21:49 +0100
Subject: [PATCH 23/49] test-bdrv-drain: Test graph changes in drain_all
 section

RH-Author: Kevin Wolf <kwolf@redhat.com>
Message-id: <20181010202213.7372-11-kwolf@redhat.com>
Patchwork-id: 82600
O-Subject: [RHEL-8 qemu-kvm PATCH 20/44] test-bdrv-drain: Test graph changes in drain_all section
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>

This tests both adding and remove a node between bdrv_drain_all_begin()
and bdrv_drain_all_end(), and enabled the existing detach test for
drain_all.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 19f7a7e574a099dca13120441fbe723cea9c1dc2)
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
 tests/test-bdrv-drain.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 73 insertions(+), 2 deletions(-)

diff --git a/tests/test-bdrv-drain.c b/tests/test-bdrv-drain.c
index c4aa913..1c8162f 100644
--- a/tests/test-bdrv-drain.c
+++ b/tests/test-bdrv-drain.c
@@ -452,7 +452,7 @@ static void test_multiparent(void)
     blk_unref(blk_b);
 }
 
-static void test_graph_change(void)
+static void test_graph_change_drain_subtree(void)
 {
     BlockBackend *blk_a, *blk_b;
     BlockDriverState *bs_a, *bs_b, *backing;
@@ -531,6 +531,63 @@ static void test_graph_change(void)
     blk_unref(blk_b);
 }
 
+static void test_graph_change_drain_all(void)
+{
+    BlockBackend *blk_a, *blk_b;
+    BlockDriverState *bs_a, *bs_b;
+    BDRVTestState *a_s, *b_s;
+
+    /* Create node A with a BlockBackend */
+    blk_a = blk_new(BLK_PERM_ALL, BLK_PERM_ALL);
+    bs_a = bdrv_new_open_driver(&bdrv_test, "test-node-a", BDRV_O_RDWR,
+                                &error_abort);
+    a_s = bs_a->opaque;
+    blk_insert_bs(blk_a, bs_a, &error_abort);
+
+    g_assert_cmpint(bs_a->quiesce_counter, ==, 0);
+    g_assert_cmpint(a_s->drain_count, ==, 0);
+
+    /* Call bdrv_drain_all_begin() */
+    bdrv_drain_all_begin();
+
+    g_assert_cmpint(bs_a->quiesce_counter, ==, 1);
+    g_assert_cmpint(a_s->drain_count, ==, 1);
+
+    /* Create node B with a BlockBackend */
+    blk_b = blk_new(BLK_PERM_ALL, BLK_PERM_ALL);
+    bs_b = bdrv_new_open_driver(&bdrv_test, "test-node-b", BDRV_O_RDWR,
+                                &error_abort);
+    b_s = bs_b->opaque;
+    blk_insert_bs(blk_b, bs_b, &error_abort);
+
+    g_assert_cmpint(bs_a->quiesce_counter, ==, 1);
+    g_assert_cmpint(bs_b->quiesce_counter, ==, 1);
+    g_assert_cmpint(a_s->drain_count, ==, 1);
+    g_assert_cmpint(b_s->drain_count, ==, 1);
+
+    /* Unref and finally delete node A */
+    blk_unref(blk_a);
+
+    g_assert_cmpint(bs_a->quiesce_counter, ==, 1);
+    g_assert_cmpint(bs_b->quiesce_counter, ==, 1);
+    g_assert_cmpint(a_s->drain_count, ==, 1);
+    g_assert_cmpint(b_s->drain_count, ==, 1);
+
+    bdrv_unref(bs_a);
+
+    g_assert_cmpint(bs_b->quiesce_counter, ==, 1);
+    g_assert_cmpint(b_s->drain_count, ==, 1);
+
+    /* End the drained section */
+    bdrv_drain_all_end();
+
+    g_assert_cmpint(bs_b->quiesce_counter, ==, 0);
+    g_assert_cmpint(b_s->drain_count, ==, 0);
+
+    bdrv_unref(bs_b);
+    blk_unref(blk_b);
+}
+
 struct test_iothread_data {
     BlockDriverState *bs;
     enum drain_type drain_type;
@@ -966,6 +1023,10 @@ static void do_test_delete_by_drain(bool detach_instead_of_delete,
         bdrv_subtree_drained_begin(bs);
         bdrv_subtree_drained_end(bs);
         break;
+    case BDRV_DRAIN_ALL:
+        bdrv_drain_all_begin();
+        bdrv_drain_all_end();
+        break;
     default:
         g_assert_not_reached();
     }
@@ -986,6 +1047,11 @@ static void test_delete_by_drain(void)
     do_test_delete_by_drain(false, BDRV_DRAIN);
 }
 
+static void test_detach_by_drain_all(void)
+{
+    do_test_delete_by_drain(true, BDRV_DRAIN_ALL);
+}
+
 static void test_detach_by_drain(void)
 {
     do_test_delete_by_drain(true, BDRV_DRAIN);
@@ -1214,7 +1280,11 @@ int main(int argc, char **argv)
 
     g_test_add_func("/bdrv-drain/nested", test_nested);
     g_test_add_func("/bdrv-drain/multiparent", test_multiparent);
-    g_test_add_func("/bdrv-drain/graph-change", test_graph_change);
+
+    g_test_add_func("/bdrv-drain/graph-change/drain_subtree",
+                    test_graph_change_drain_subtree);
+    g_test_add_func("/bdrv-drain/graph-change/drain_all",
+                    test_graph_change_drain_all);
 
     g_test_add_func("/bdrv-drain/iothread/drain_all", test_iothread_drain_all);
     g_test_add_func("/bdrv-drain/iothread/drain", test_iothread_drain);
@@ -1227,6 +1297,7 @@ int main(int argc, char **argv)
                     test_blockjob_drain_subtree);
 
     g_test_add_func("/bdrv-drain/deletion/drain", test_delete_by_drain);
+    g_test_add_func("/bdrv-drain/detach/drain_all", test_detach_by_drain_all);
     g_test_add_func("/bdrv-drain/detach/drain", test_detach_by_drain);
     g_test_add_func("/bdrv-drain/detach/drain_subtree", test_detach_by_drain_subtree);
     g_test_add_func("/bdrv-drain/detach/parent_cb", test_detach_by_parent_cb);
-- 
1.8.3.1