From patchwork Wed Oct 12 11:19:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fiona Ebner X-Patchwork-Id: 13004967 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 272CFC433FE for ; Wed, 12 Oct 2022 11:21:46 +0000 (UTC) Received: from localhost ([::1]:55534 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oiZo0-0007nW-T5 for qemu-devel@archiver.kernel.org; Wed, 12 Oct 2022 07:21:44 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:43772) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oiZmf-00070i-Oq for qemu-devel@nongnu.org; Wed, 12 Oct 2022 07:20:21 -0400 Received: from proxmox-new.maurer-it.com ([94.136.29.106]:49412) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oiZmd-00068B-Oo for qemu-devel@nongnu.org; Wed, 12 Oct 2022 07:20:21 -0400 Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id 4A6DF44953; Wed, 12 Oct 2022 13:20:07 +0200 (CEST) From: Fiona Ebner To: qemu-devel@nongnu.org Cc: gilbert@redhat.com, quintela@redhat.com Subject: [PATCH] migration/channel-block: fix return value for qio_channel_block_{readv, writev} Date: Wed, 12 Oct 2022 13:19:35 +0200 Message-Id: <20221012111935.117480-1-f.ebner@proxmox.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Received-SPF: pass client-ip=94.136.29.106; envelope-from=f.ebner@proxmox.com; helo=proxmox-new.maurer-it.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, 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" in the error case. The documentation in include/io/channel.h states that -1 or QIO_CHANNEL_ERR_BLOCK should be returned upon error. Simply passing along the return value from the bdrv-functions has the potential to confuse the call sides. Non-blocking mode is not implemented currently, so -1 it is. Signed-off-by: Fiona Ebner --- migration/channel-block.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/migration/channel-block.c b/migration/channel-block.c index c55c8c93ce..aabc4634a4 100644 --- a/migration/channel-block.c +++ b/migration/channel-block.c @@ -62,7 +62,8 @@ qio_channel_block_readv(QIOChannel *ioc, qemu_iovec_init_external(&qiov, (struct iovec *)iov, niov); ret = bdrv_readv_vmstate(bioc->bs, &qiov, bioc->offset); if (ret < 0) { - return ret; + error_setg(errp, "bdrv_readv_vmstate returned error %d", ret); + return -1; } bioc->offset += qiov.size; @@ -86,7 +87,8 @@ qio_channel_block_writev(QIOChannel *ioc, qemu_iovec_init_external(&qiov, (struct iovec *)iov, niov); ret = bdrv_writev_vmstate(bioc->bs, &qiov, bioc->offset); if (ret < 0) { - return ret; + error_setg(errp, "bdrv_writev_vmstate returned error %d", ret); + return -1; } bioc->offset += qiov.size;