From patchwork Thu Oct 12 16:22:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 13419431 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C8639CDB482 for ; Thu, 12 Oct 2023 16:23:58 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qqySg-0003Vx-HZ; Thu, 12 Oct 2023 12:22:58 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qqySZ-0003V4-SZ for qemu-devel@nongnu.org; Thu, 12 Oct 2023 12:22:53 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qqySQ-0000ZJ-Ef for qemu-devel@nongnu.org; Thu, 12 Oct 2023 12:22:51 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1697127761; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=L6Bs8MIL1VR6WC0PYIRlqYWz8luW1P57myroUR9lSIk=; b=bi2AU5wM89H/I+95BhLhQhPCgJ7XD71pqNZkeSz6zupcPma+pldRDLcRplEzOcPQABWXQn eP+5WdtmDQPkN5vYN6znF8zlu4iIqNPQOvQPd3tYBsbfrAkUu5ngRZFNWeecycewDjNZS/ UCQo4ejKzqgP8HTBVW9XOgScQu9uTT8= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-297--MelyAi3NDiOr9_udiOLyQ-1; Thu, 12 Oct 2023 12:22:40 -0400 X-MC-Unique: -MelyAi3NDiOr9_udiOLyQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id B0E3838107A1; Thu, 12 Oct 2023 16:22:39 +0000 (UTC) Received: from merkur.fritz.box (unknown [10.39.192.233]) by smtp.corp.redhat.com (Postfix) with ESMTP id 20CB520296DB; Thu, 12 Oct 2023 16:22:39 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Cc: kwolf@redhat.com, qemu-devel@nongnu.org Subject: [PULL 05/26] test-bdrv-drain: Don't call bdrv_graph_wrlock() in coroutine context Date: Thu, 12 Oct 2023 18:22:03 +0200 Message-ID: <20231012162224.240535-6-kwolf@redhat.com> In-Reply-To: <20231012162224.240535-1-kwolf@redhat.com> References: <20231012162224.240535-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.4 Received-SPF: pass client-ip=170.10.129.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org AIO callbacks are effectively coroutine_mixed_fn. If AIO requests don't return immediately, their callback is called from the request coroutine. This means that in AIO callbacks, we can't call no_coroutine_fns such as bdrv_graph_wrlock(). Unfortunately test-bdrv-drain does so. Change the test to use a BH to drop out of coroutine context, and add coroutine_mixed_fn and no_coroutine_fn markers to clarify the context each function runs in. Signed-off-by: Kevin Wolf Message-ID: <20230929145157.45443-2-kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi Signed-off-by: Kevin Wolf --- tests/unit/test-bdrv-drain.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/tests/unit/test-bdrv-drain.c b/tests/unit/test-bdrv-drain.c index 0b603e7c57..bdd3757615 100644 --- a/tests/unit/test-bdrv-drain.c +++ b/tests/unit/test-bdrv-drain.c @@ -1168,7 +1168,7 @@ struct detach_by_parent_data { }; static struct detach_by_parent_data detach_by_parent_data; -static void detach_indirect_bh(void *opaque) +static void no_coroutine_fn detach_indirect_bh(void *opaque) { struct detach_by_parent_data *data = opaque; @@ -1184,14 +1184,15 @@ static void detach_indirect_bh(void *opaque) bdrv_graph_wrunlock(); } -static void detach_by_parent_aio_cb(void *opaque, int ret) +static void coroutine_mixed_fn detach_by_parent_aio_cb(void *opaque, int ret) { struct detach_by_parent_data *data = &detach_by_parent_data; g_assert_cmpint(ret, ==, 0); if (data->by_parent_cb) { bdrv_inc_in_flight(data->child_b->bs); - detach_indirect_bh(data); + aio_bh_schedule_oneshot(qemu_get_current_aio_context(), + detach_indirect_bh, &detach_by_parent_data); } }