From patchwork Tue Jul 12 21:19:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Emanuele Giuseppe Esposito X-Patchwork-Id: 1655643 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=MyatZ7D9; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) 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 bilbo.ozlabs.org (Postfix) with ESMTPS id 4LjDKl6wBnz9s09 for ; Wed, 13 Jul 2022 07:24:43 +1000 (AEST) Received: from localhost ([::1]:33734 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oBNN3-0001cf-81 for incoming@patchwork.ozlabs.org; Tue, 12 Jul 2022 17:24:41 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:34628) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oBNIJ-0002un-1D for qemu-devel@nongnu.org; Tue, 12 Jul 2022 17:19:50 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:52828) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oBNHw-0002J7-RZ for qemu-devel@nongnu.org; Tue, 12 Jul 2022 17:19:46 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1657660762; 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=KybLU9IwFgMw2xhqFt7O9/VvMxuZ2cPdo4RsO4G9iaw=; b=MyatZ7D9tD1w34B33n1yjJqPIc5VzRneKZFrANBvzP+o0GNpr5wJvhSJzucpDv7WOtFqwN rpkiM1iqt4w/pCjVIcsbnheuSul0gK3PxFX2Cbhd57uWGeXIDEK3db9tXoKsP3O/Y2R+2u mcPpOR6c12qSb3j9vuiLPXw8p3Jl0ao= Received: from mimecast-mx02.redhat.com (mx3-rdu2.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-584-SXNDNXHzNwibxhZnZjmj1A-1; Tue, 12 Jul 2022 17:19:21 -0400 X-MC-Unique: SXNDNXHzNwibxhZnZjmj1A-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 76E341C05145; Tue, 12 Jul 2022 21:19:20 +0000 (UTC) Received: from virtlab701.virt.lab.eng.bos.redhat.com (virtlab701.virt.lab.eng.bos.redhat.com [10.19.152.228]) by smtp.corp.redhat.com (Postfix) with ESMTP id 803482166B2A; Tue, 12 Jul 2022 21:19:19 +0000 (UTC) From: Emanuele Giuseppe Esposito To: qemu-devel@nongnu.org Cc: Kevin Wolf , Hanna Reitz , John Snow , Stefan Hajnoczi , Paolo Bonzini , Vladimir Sementsov-Ogievskiy , qemu-block@nongnu.org, Emanuele Giuseppe Esposito Subject: [RFC PATCH 7/8] block: use the new _change_ API instead of _can_set_ and _set_ Date: Tue, 12 Jul 2022 17:19:10 -0400 Message-Id: <20220712211911.1302836-8-eesposit@redhat.com> In-Reply-To: <20220712211911.1302836-1-eesposit@redhat.com> References: <20220712211911.1302836-1-eesposit@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 Received-SPF: pass client-ip=170.10.133.124; envelope-from=eesposit@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Replace all direct usage of ->can_set_aio_ctx and ->set_aio_ctx, and call bdrv_child_try_change_aio_context() in bdrv_try_set_aio_context(), the main function called through the whole block layer. From this point onwards, ->can_set_aio_ctx and ->set_aio_ctx won't be used anymore. Signed-off-by: Emanuele Giuseppe Esposito --- block.c | 30 ++++++++++++++++-------------- block/block-backend.c | 8 ++++++-- 2 files changed, 22 insertions(+), 16 deletions(-) diff --git a/block.c b/block.c index a7ba590dfa..101188a2d4 100644 --- a/block.c +++ b/block.c @@ -2966,17 +2966,18 @@ static void bdrv_attach_child_common_abort(void *opaque) } if (bdrv_child_get_parent_aio_context(child) != s->old_parent_ctx) { + Transaction *tran; GSList *ignore; + bool ret; - /* No need to ignore `child`, because it has been detached already */ - ignore = NULL; - child->klass->can_set_aio_ctx(child, s->old_parent_ctx, &ignore, - &error_abort); - g_slist_free(ignore); + tran = tran_new(); + /* No need to ignore `child`, because it has been detached already */ ignore = NULL; - child->klass->set_aio_ctx(child, s->old_parent_ctx, &ignore); + ret = child->klass->change_aio_ctx(child, s->old_parent_ctx, &ignore, + tran, &error_abort); g_slist_free(ignore); + tran_finalize(tran, ret ? ret : -1); } bdrv_unref(bs); @@ -3037,17 +3038,18 @@ static int bdrv_attach_child_common(BlockDriverState *child_bs, Error *local_err = NULL; int ret = bdrv_try_set_aio_context(child_bs, parent_ctx, &local_err); - if (ret < 0 && child_class->can_set_aio_ctx) { + if (ret < 0 && child_class->change_aio_ctx) { + Transaction *tran = tran_new(); GSList *ignore = g_slist_prepend(NULL, new_child); - if (child_class->can_set_aio_ctx(new_child, child_ctx, &ignore, - NULL)) - { + bool ret_child; + + ret_child = child_class->change_aio_ctx(new_child, child_ctx, + &ignore, tran, NULL); + if (ret_child) { error_free(local_err); ret = 0; - g_slist_free(ignore); - ignore = g_slist_prepend(NULL, new_child); - child_class->set_aio_ctx(new_child, child_ctx, &ignore); } + tran_finalize(tran, ret_child ? ret_child : -1); g_slist_free(ignore); } @@ -7708,7 +7710,7 @@ int bdrv_try_set_aio_context(BlockDriverState *bs, AioContext *ctx, Error **errp) { GLOBAL_STATE_CODE(); - return bdrv_child_try_set_aio_context(bs, ctx, NULL, errp); + return bdrv_child_try_change_aio_context(bs, ctx, NULL, errp); } void bdrv_add_aio_context_notifier(BlockDriverState *bs, diff --git a/block/block-backend.c b/block/block-backend.c index 674eaaa2bf..6e90ac3a6a 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -2184,8 +2184,12 @@ static int blk_do_set_aio_context(BlockBackend *blk, AioContext *new_context, bdrv_ref(bs); if (update_root_node) { - ret = bdrv_child_try_set_aio_context(bs, new_context, blk->root, - errp); + /* + * update_root_node MUST be false for blk_root_set_aio_ctx_commit(), + * as we are already in the commit function of a transaction. + */ + ret = bdrv_child_try_change_aio_context(bs, new_context, blk->root, + errp); if (ret < 0) { bdrv_unref(bs); return ret;