From mboxrd@z Thu Jan 1 00:00:00 1970 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 84437C433EF for ; Mon, 25 Oct 2021 10:39:20 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 2E22861073 for ; Mon, 25 Oct 2021 10:39:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 2E22861073 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:52400 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mexNv-0001Ip-9H for qemu-devel@archiver.kernel.org; Mon, 25 Oct 2021 06:39:19 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49172) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mex4H-0005TR-Vf for qemu-devel@nongnu.org; Mon, 25 Oct 2021 06:19:02 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:47300) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mex4G-00072g-4d for qemu-devel@nongnu.org; Mon, 25 Oct 2021 06:19:01 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1635157138; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=M2UmTb/mBF8aPIoeBYqxIReiGrA8sGYEVY32f/GM3T4=; b=am2NfWTrzarw9P0bziaS1veh1vv/tp8hl6TaPHnv1dpNXZN2LAZxbm9BLZM60uPo3VEQfX 0TlRn1q1hXjU7K5clEUYV7JSq00LCz49GDAChOkbnlHTSw/9qV2p2lsIF/6m30tm2HRIKc 3iOJEDZbLFYuF7Fi3NYuhsTzy71QVlw= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-340-XpnihTBaMKa4iRt_dPhV6w-1; Mon, 25 Oct 2021 06:18:55 -0400 X-MC-Unique: XpnihTBaMKa4iRt_dPhV6w-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4A33F18125C0; Mon, 25 Oct 2021 10:18:54 +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 1BD7017CE1; Mon, 25 Oct 2021 10:18:53 +0000 (UTC) From: Emanuele Giuseppe Esposito To: qemu-block@nongnu.org Subject: [PATCH v4 17/25] block/copy-before-write.h: global state API + assertions Date: Mon, 25 Oct 2021 06:17:27 -0400 Message-Id: <20211025101735.2060852-18-eesposit@redhat.com> In-Reply-To: <20211025101735.2060852-1-eesposit@redhat.com> References: <20211025101735.2060852-1-eesposit@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eesposit@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" 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: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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_LOW=-0.7, RCVD_IN_MSPIKE_H2=-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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Fam Zheng , Vladimir Sementsov-Ogievskiy , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Eduardo Habkost , Juan Quintela , qemu-devel@nongnu.org, John Snow , Emanuele Giuseppe Esposito , Richard Henderson , Markus Armbruster , "Dr. David Alan Gilbert" , Hanna Reitz , Stefan Hajnoczi , Paolo Bonzini , Eric Blake Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" copy-before-write functions always run under BQL lock. Signed-off-by: Emanuele Giuseppe Esposito Reviewed-by: Paolo Bonzini Reviewed-by: Stefan Hajnoczi --- block/copy-before-write.c | 2 ++ block/copy-before-write.h | 7 +++++++ 2 files changed, 9 insertions(+) diff --git a/block/copy-before-write.c b/block/copy-before-write.c index c30a5ff8de..36a8d7ba52 100644 --- a/block/copy-before-write.c +++ b/block/copy-before-write.c @@ -223,6 +223,7 @@ BlockDriverState *bdrv_cbw_append(BlockDriverState *source, QDict *opts; assert(source->total_sectors == target->total_sectors); + assert(qemu_in_main_thread()); opts = qdict_new(); qdict_put_str(opts, "driver", "copy-before-write"); @@ -245,6 +246,7 @@ BlockDriverState *bdrv_cbw_append(BlockDriverState *source, void bdrv_cbw_drop(BlockDriverState *bs) { + assert(qemu_in_main_thread()); bdrv_drop_filter(bs, &error_abort); bdrv_unref(bs); } diff --git a/block/copy-before-write.h b/block/copy-before-write.h index 51847e711a..9a45de2fce 100644 --- a/block/copy-before-write.h +++ b/block/copy-before-write.h @@ -29,6 +29,13 @@ #include "block/block_int.h" #include "block/block-copy.h" +/* + * Global state (GS) API. These functions run under the BQL lock. + * + * See include/block/block-global-state.h for more information about + * the GS API. + */ + BlockDriverState *bdrv_cbw_append(BlockDriverState *source, BlockDriverState *target, const char *filter_node_name, -- 2.27.0