block: Fix deadlocks in bdrv_graph_wrunlock()

[mirror_qemu.git] / tests / unit / test-bdrv-drain.c

diff --git a/tests/unit/test-bdrv-drain.c b/tests/unit/test-bdrv-drain.c
index bdd3757615290aa0acbbc861a3a862a712de0c00..704d1a3f361525edf42c67f36d64ff59db9af231 100644 (file)
--- a/tests/unit/test-bdrv-drain.c
+++ b/tests/unit/test-bdrv-drain.c
@@ -96,9 +96,9 @@ static int coroutine_fn bdrv_test_co_preadv(BlockDriverState *bs,
     return 0;
 }
 
-static int bdrv_test_change_backing_file(BlockDriverState *bs,
-                                         const char *backing_file,
-                                         const char *backing_fmt)
+static int bdrv_test_co_change_backing_file(BlockDriverState *bs,
+                                            const char *backing_file,
+                                            const char *backing_fmt)
 {
     return 0;
 }
@@ -116,7 +116,7 @@ static BlockDriver bdrv_test = {
 
     .bdrv_child_perm        = bdrv_default_perms,
 
-    .bdrv_change_backing_file = bdrv_test_change_backing_file,
+    .bdrv_co_change_backing_file = bdrv_test_co_change_backing_file,
 };
 
 static void aio_ret_cb(void *opaque, int ret)
@@ -218,8 +218,14 @@ static void do_drain_end_unlocked(enum drain_type drain_type, BlockDriverState *
     }
 }
 
-static void test_drv_cb_common(BlockBackend *blk, enum drain_type drain_type,
-                               bool recursive)
+/*
+ * Locking the block graph would be a bit cumbersome here because this function
+ * is called both in coroutine and non-coroutine context. We know this is a test
+ * and nothing else is running, so don't bother with TSA.
+ */
+static void coroutine_mixed_fn TSA_NO_TSA
+test_drv_cb_common(BlockBackend *blk, enum drain_type drain_type,
+                   bool recursive)
 {
     BlockDriverState *bs = blk_bs(blk);
     BlockDriverState *backing = bs->backing->bs;
@@ -307,8 +313,14 @@ static void test_drv_cb_co_drain(void)
     blk_unref(blk);
 }
 
-static void test_quiesce_common(BlockBackend *blk, enum drain_type drain_type,
-                                bool recursive)
+/*
+ * Locking the block graph would be a bit cumbersome here because this function
+ * is called both in coroutine and non-coroutine context. We know this is a test
+ * and nothing else is running, so don't bother with TSA.
+ */
+static void coroutine_mixed_fn TSA_NO_TSA
+test_quiesce_common(BlockBackend *blk, enum drain_type drain_type,
+                    bool recursive)
 {
     BlockDriverState *bs = blk_bs(blk);
     BlockDriverState *backing = bs->backing->bs;
@@ -794,7 +806,10 @@ static void test_blockjob_common_drain_node(enum drain_type drain_type,
                             0, 0, NULL, NULL, &error_abort);
     tjob->bs = src;
     job = &tjob->common;
+
+    bdrv_graph_wrlock(target);
     block_job_add_bdrv(job, "target", target, 0, BLK_PERM_ALL, &error_abort);
+    bdrv_graph_wrunlock(target);
 
     switch (result) {
     case TEST_JOB_SUCCESS:
@@ -980,7 +995,7 @@ static void bdrv_test_top_close(BlockDriverState *bs)
     QLIST_FOREACH_SAFE(c, &bs->children, next, next_c) {
         bdrv_unref_child(bs, c);
     }
-    bdrv_graph_wrunlock();
+    bdrv_graph_wrunlock(NULL);
 }
 
 static int coroutine_fn GRAPH_RDLOCK
@@ -1034,9 +1049,13 @@ static void coroutine_fn test_co_delete_by_drain(void *opaque)
         blk_co_unref(blk);
     } else {
         BdrvChild *c, *next_c;
+        bdrv_graph_co_rdlock();
         QLIST_FOREACH_SAFE(c, &bs->children, next, next_c) {
+            bdrv_graph_co_rdunlock();
             bdrv_co_unref_child(bs, c);
+            bdrv_graph_co_rdlock();
         }
+        bdrv_graph_co_rdunlock();
     }
 
     dbdd->done = true;
@@ -1069,7 +1088,7 @@ static void do_test_delete_by_drain(bool detach_instead_of_delete,
     bdrv_graph_wrlock(NULL);
     bdrv_attach_child(bs, null_bs, "null-child", &child_of_bds,
                       BDRV_CHILD_DATA, &error_abort);
-    bdrv_graph_wrunlock();
+    bdrv_graph_wrunlock(NULL);
 
     /* This child will be the one to pass to requests through to, and
      * it will stall until a drain occurs */
@@ -1082,7 +1101,7 @@ static void do_test_delete_by_drain(bool detach_instead_of_delete,
                                         &child_of_bds,
                                         BDRV_CHILD_DATA | BDRV_CHILD_PRIMARY,
                                         &error_abort);
-    bdrv_graph_wrunlock();
+    bdrv_graph_wrunlock(NULL);
 
     /* This child is just there to be deleted
      * (for detach_instead_of_delete == true) */
@@ -1091,7 +1110,7 @@ static void do_test_delete_by_drain(bool detach_instead_of_delete,
     bdrv_graph_wrlock(NULL);
     bdrv_attach_child(bs, null_bs, "null-child", &child_of_bds, BDRV_CHILD_DATA,
                       &error_abort);
-    bdrv_graph_wrunlock();
+    bdrv_graph_wrunlock(NULL);
 
     blk = blk_new(qemu_get_aio_context(), BLK_PERM_ALL, BLK_PERM_ALL);
     blk_insert_bs(blk, bs, &error_abort);
@@ -1181,7 +1200,7 @@ static void no_coroutine_fn detach_indirect_bh(void *opaque)
     data->child_c = bdrv_attach_child(data->parent_b, data->c, "PB-C",
                                       &child_of_bds, BDRV_CHILD_DATA,
                                       &error_abort);
-    bdrv_graph_wrunlock();
+    bdrv_graph_wrunlock(NULL);
 }
 
 static void coroutine_mixed_fn detach_by_parent_aio_cb(void *opaque, int ret)
@@ -1196,7 +1215,7 @@ static void coroutine_mixed_fn detach_by_parent_aio_cb(void *opaque, int ret)
     }
 }
 
-static void detach_by_driver_cb_drained_begin(BdrvChild *child)
+static void GRAPH_RDLOCK detach_by_driver_cb_drained_begin(BdrvChild *child)
 {
     struct detach_by_parent_data *data = &detach_by_parent_data;
 
@@ -1233,7 +1252,7 @@ static BdrvChildClass detach_by_driver_cb_class;
  *     state is messed up, but if it is only polled in the single
  *     BDRV_POLL_WHILE() at the end of the drain, this should work fine.
  */
-static void test_detach_indirect(bool by_parent_cb)
+static void TSA_NO_TSA test_detach_indirect(bool by_parent_cb)
 {
     BlockBackend *blk;
     BlockDriverState *parent_a, *parent_b, *a, *b, *c;
@@ -1289,7 +1308,7 @@ static void test_detach_indirect(bool by_parent_cb)
     bdrv_attach_child(parent_a, a, "PA-A",
                       by_parent_cb ? &child_of_bds : &detach_by_driver_cb_class,
                       BDRV_CHILD_DATA, &error_abort);
-    bdrv_graph_wrunlock();
+    bdrv_graph_wrunlock(NULL);
 
     g_assert_cmpint(parent_a->refcnt, ==, 1);
     g_assert_cmpint(parent_b->refcnt, ==, 1);
@@ -1716,7 +1735,7 @@ static void test_drop_intermediate_poll(void)
                               &chain_child_class, BDRV_CHILD_COW, &error_abort);
         }
     }
-    bdrv_graph_wrunlock();
+    bdrv_graph_wrunlock(NULL);
 
     job = block_job_create("job", &test_simple_job_driver, NULL, job_node,
                            0, BLK_PERM_ALL, 0, 0, NULL, NULL, &error_abort);
@@ -1861,6 +1880,8 @@ static void bdrv_replace_test_drain_end(BlockDriverState *bs)
 {
     BDRVReplaceTestState *s = bs->opaque;
 
+    GRAPH_RDLOCK_GUARD_MAINLOOP();
+
     if (!s->setup_completed) {
         return;
     }
@@ -1964,7 +1985,7 @@ static void do_test_replace_child_mid_drain(int old_drain_count,
     bdrv_graph_wrlock(NULL);
     bdrv_attach_child(parent_bs, old_child_bs, "child", &child_of_bds,
                       BDRV_CHILD_COW, &error_abort);
-    bdrv_graph_wrunlock();
+    bdrv_graph_wrunlock(NULL);
     parent_s->setup_completed = true;
 
     for (i = 0; i < old_drain_count; i++) {
@@ -1993,7 +2014,13 @@ static void do_test_replace_child_mid_drain(int old_drain_count,
     parent_s->was_undrained = false;
 
     g_assert(parent_bs->quiesce_counter == old_drain_count);
+    bdrv_drained_begin(old_child_bs);
+    bdrv_drained_begin(new_child_bs);
+    bdrv_graph_wrlock(NULL);
     bdrv_replace_node(old_child_bs, new_child_bs, &error_abort);
+    bdrv_graph_wrunlock(NULL);
+    bdrv_drained_end(new_child_bs);
+    bdrv_drained_end(old_child_bs);
     g_assert(parent_bs->quiesce_counter == new_drain_count);
 
     if (!old_drain_count && !new_drain_count) {