From patchwork Tue Jun 15 20:47:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Blake X-Patchwork-Id: 12322933 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 20D81C48BE5 for ; Tue, 15 Jun 2021 21:06:34 +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 BDB1E608FC for ; Tue, 15 Jun 2021 21:06:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BDB1E608FC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:58910 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ltGGW-0002Dj-MB for qemu-devel@archiver.kernel.org; Tue, 15 Jun 2021 17:06:32 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:58158) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ltFyz-0002Pf-4t for qemu-devel@nongnu.org; Tue, 15 Jun 2021 16:48:25 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:53899) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ltFyw-000186-RR for qemu-devel@nongnu.org; Tue, 15 Jun 2021 16:48:24 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1623790102; 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=6uh9cBHhUyG1PktDZmCD1K73GPQPiY9MUtvcCA3NkEk=; b=hvIZcxFmtWyEEpGIaW3naacI1UZVP4+IjNY7eq3ZiIRVna4VZ2TarbEMnv6oa6HB0PeadF xS2qi++1wxH5W/o7B0BSvbBGjQBAzsnvNebjKjJiHru2nl8K2xwbumkoDrH7W0hmgb6K0O 7SGuUWu1CZ4unLdrEg5y5pXPp5iJL3o= 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-357-rpEqD-pBMqaZDlrPT5m7Ig-1; Tue, 15 Jun 2021 16:48:20 -0400 X-MC-Unique: rpEqD-pBMqaZDlrPT5m7Ig-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 E21F28030CF; Tue, 15 Jun 2021 20:48:18 +0000 (UTC) Received: from blue.redhat.com (ovpn-114-191.phx2.redhat.com [10.3.114.191]) by smtp.corp.redhat.com (Postfix) with ESMTP id 697D55D9CA; Tue, 15 Jun 2021 20:48:18 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Subject: [PULL 15/34] block/nbd: make nbd_co_establish_connection_cancel() bs-independent Date: Tue, 15 Jun 2021 15:47:37 -0500 Message-Id: <20210615204756.281505-16-eblake@redhat.com> In-Reply-To: <20210615204756.281505-1-eblake@redhat.com> References: <20210615204756.281505-1-eblake@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=eblake@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=eblake@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.197, 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_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: Roman Kagan , Kevin Wolf , Vladimir Sementsov-Ogievskiy , "open list:Network Block Dev..." , Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Vladimir Sementsov-Ogievskiy nbd_co_establish_connection_cancel() actually needs only pointer to NBDConnectThread. So, make it clean. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Roman Kagan Reviewed-by: Eric Blake Message-Id: <20210610100802.5888-14-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake --- block/nbd.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/block/nbd.c b/block/nbd.c index 15b569a899fd..bee615e5c4c1 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -132,7 +132,7 @@ static int nbd_establish_connection(BlockDriverState *bs, SocketAddress *saddr, Error **errp); static coroutine_fn QIOChannelSocket * nbd_co_establish_connection(NBDConnectThread *thr, Error **errp); -static void nbd_co_establish_connection_cancel(BlockDriverState *bs); +static void nbd_co_establish_connection_cancel(NBDConnectThread *thr); static int nbd_client_handshake(BlockDriverState *bs, Error **errp); static void nbd_yank(void *opaque); @@ -295,7 +295,7 @@ static void coroutine_fn nbd_client_co_drain_begin(BlockDriverState *bs) s->drained = true; qemu_co_sleep_wake(&s->reconnect_sleep); - nbd_co_establish_connection_cancel(bs); + nbd_co_establish_connection_cancel(s->connect_thread); reconnect_delay_timer_del(s); @@ -333,7 +333,7 @@ static void nbd_teardown_connection(BlockDriverState *bs) s->state = NBD_CLIENT_QUIT; if (s->connection_co) { qemu_co_sleep_wake(&s->reconnect_sleep); - nbd_co_establish_connection_cancel(bs); + nbd_co_establish_connection_cancel(s->connect_thread); } if (qemu_in_coroutine()) { s->teardown_co = qemu_coroutine_self(); @@ -488,13 +488,14 @@ nbd_co_establish_connection(NBDConnectThread *thr, Error **errp) /* * nbd_co_establish_connection_cancel - * Cancel nbd_co_establish_connection asynchronously: it will finish soon, to - * allow drained section to begin. + * Cancel nbd_co_establish_connection() asynchronously. + * + * Note that this function neither directly stops the thread nor closes the + * socket, but rather safely wakes nbd_co_establish_connection() which is + * sleeping in yield() */ -static void nbd_co_establish_connection_cancel(BlockDriverState *bs) +static void nbd_co_establish_connection_cancel(NBDConnectThread *thr) { - BDRVNBDState *s = bs->opaque; - NBDConnectThread *thr = s->connect_thread; Coroutine *wait_co; qemu_mutex_lock(&thr->mutex);