From patchwork Thu Jun 23 16:53:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Dr. David Alan Gilbert" X-Patchwork-Id: 12892986 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 BE0D9C433EF for ; Thu, 23 Jun 2022 17:12:36 +0000 (UTC) Received: from localhost ([::1]:35100 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1o4QNf-0004MW-TY for qemu-devel@archiver.kernel.org; Thu, 23 Jun 2022 13:12:35 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60488) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o4Q66-0006CM-KF for qemu-devel@nongnu.org; Thu, 23 Jun 2022 12:54:26 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:37954) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o4Q64-0005zh-VK for qemu-devel@nongnu.org; Thu, 23 Jun 2022 12:54:26 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1656003264; 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=T1xN+11P1k1HT8e/kdMnxGNyNbGhYmDHd2rNAaVdSkY=; b=TU9xpPnmiHAz9OC+wAAxqhhXIBF5GFEVFyq0PgCLraWmo7Nd3D0d7oJS49/9NPpaO4Yeav ggfRJzHA6TksqVbpdZ0g3mGTLsUPP3IR0SRJAISL6wmrTe/BXsvViezcrMttObb753ep8Y /Oh4k/mArOK14358FJ2KWm4oBFqERFw= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-462-JdM5PfxnNQ6HDQQPdpDuog-1; Thu, 23 Jun 2022 12:54:23 -0400 X-MC-Unique: JdM5PfxnNQ6HDQQPdpDuog-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 22BFD101E985; Thu, 23 Jun 2022 16:54:23 +0000 (UTC) Received: from dgilbert-t580.localhost (unknown [10.33.36.159]) by smtp.corp.redhat.com (Postfix) with ESMTP id 278A42026D64; Thu, 23 Jun 2022 16:54:22 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, berrange@redhat.com, huangy81@chinatelecom.cn, quintela@redhat.com, leobras@redhat.com, peterx@redhat.com Cc: jdenemar@redhat.com Subject: [PULL 19/25] migration: remove the QEMUFileOps 'shut_down' callback Date: Thu, 23 Jun 2022 17:53:48 +0100 Message-Id: <20220623165354.197792-20-dgilbert@redhat.com> In-Reply-To: <20220623165354.197792-1-dgilbert@redhat.com> References: <20220623165354.197792-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 Received-SPF: pass client-ip=170.10.133.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 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_LOW=-0.7, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Daniel P. Berrangé This directly implements the shutdown logic using QIOChannel APIs. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrangé Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert --- migration/qemu-file-channel.c | 27 --------------------------- migration/qemu-file.c | 13 ++++++++++--- migration/qemu-file.h | 10 ---------- 3 files changed, 10 insertions(+), 40 deletions(-) diff --git a/migration/qemu-file-channel.c b/migration/qemu-file-channel.c index 5cb8ac93c0..80f05dc371 100644 --- a/migration/qemu-file-channel.c +++ b/migration/qemu-file-channel.c @@ -112,31 +112,6 @@ static int channel_close(void *opaque, Error **errp) } -static int channel_shutdown(void *opaque, - bool rd, - bool wr, - Error **errp) -{ - QIOChannel *ioc = QIO_CHANNEL(opaque); - - if (qio_channel_has_feature(ioc, - QIO_CHANNEL_FEATURE_SHUTDOWN)) { - QIOChannelShutdown mode; - if (rd && wr) { - mode = QIO_CHANNEL_SHUTDOWN_BOTH; - } else if (rd) { - mode = QIO_CHANNEL_SHUTDOWN_READ; - } else { - mode = QIO_CHANNEL_SHUTDOWN_WRITE; - } - if (qio_channel_shutdown(ioc, mode, errp) < 0) { - return -EIO; - } - } - return 0; -} - - static int channel_set_blocking(void *opaque, bool enabled, Error **errp) @@ -166,7 +141,6 @@ static QEMUFile *channel_get_output_return_path(void *opaque) static const QEMUFileOps channel_input_ops = { .get_buffer = channel_get_buffer, .close = channel_close, - .shut_down = channel_shutdown, .set_blocking = channel_set_blocking, .get_return_path = channel_get_input_return_path, }; @@ -175,7 +149,6 @@ static const QEMUFileOps channel_input_ops = { static const QEMUFileOps channel_output_ops = { .writev_buffer = channel_writev_buffer, .close = channel_close, - .shut_down = channel_shutdown, .set_blocking = channel_set_blocking, .get_return_path = channel_get_output_return_path, }; diff --git a/migration/qemu-file.c b/migration/qemu-file.c index 2d6ceb53af..d71bcb6c9c 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -71,16 +71,23 @@ struct QEMUFile { /* * Stop a file from being read/written - not all backing files can do this * typically only sockets can. + * + * TODO: convert to propagate Error objects instead of squashing + * to a fixed errno value */ int qemu_file_shutdown(QEMUFile *f) { - int ret; + int ret = 0; f->shutdown = true; - if (!f->ops->shut_down) { + if (!qio_channel_has_feature(f->ioc, + QIO_CHANNEL_FEATURE_SHUTDOWN)) { return -ENOSYS; } - ret = f->ops->shut_down(f->ioc, true, true, NULL); + + if (qio_channel_shutdown(f->ioc, QIO_CHANNEL_SHUTDOWN_BOTH, NULL) < 0) { + ret = -EIO; + } if (!f->last_error) { qemu_file_set_error(f, -EIO); diff --git a/migration/qemu-file.h b/migration/qemu-file.h index fe1b2d1c00..9fa92c1998 100644 --- a/migration/qemu-file.h +++ b/migration/qemu-file.h @@ -89,22 +89,12 @@ typedef size_t (QEMURamSaveFunc)(QEMUFile *f, */ typedef QEMUFile *(QEMURetPathFunc)(void *opaque); -/* - * Stop any read or write (depending on flags) on the underlying - * transport on the QEMUFile. - * Existing blocking reads/writes must be woken - * Returns 0 on success, -err on error - */ -typedef int (QEMUFileShutdownFunc)(void *opaque, bool rd, bool wr, - Error **errp); - typedef struct QEMUFileOps { QEMUFileGetBufferFunc *get_buffer; QEMUFileCloseFunc *close; QEMUFileSetBlocking *set_blocking; QEMUFileWritevBufferFunc *writev_buffer; QEMURetPathFunc *get_return_path; - QEMUFileShutdownFunc *shut_down; } QEMUFileOps; typedef struct QEMUFileHooks {