From patchwork Wed Oct 11 09:21:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Juan Quintela X-Patchwork-Id: 13417009 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 7B4F1CD6E57 for ; Wed, 11 Oct 2023 09:35:25 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qqVRQ-0001sj-Qn; Wed, 11 Oct 2023 05:23:44 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qqVRQ-0001od-2t for qemu-devel@nongnu.org; Wed, 11 Oct 2023 05:23:44 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qqVRO-00055H-DJ for qemu-devel@nongnu.org; Wed, 11 Oct 2023 05:23:43 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1697016221; 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=L6wT3q2hbremT/Wm3YQwFuxxnNfWtrG9kS4r/6U2YGI=; b=YsOTBMVA0UhEB6Q0MTtIZL3BvwZUqrQWqiHa5sdP+xSNm55ZZLFPaE7nnOHd/RCXNmlY3F IxTtsD/u9rVjeZxApXiu+Y8SrFUaxaFz88Lgy5OKJvN8cIrlRq+YcV6pk8GMn46yvV+89u hnTR0cqf5GIMky7iM+RuIuca8zWnb+M= 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-617-LdxKr9qlPc2-58VRx7CHzA-1; Wed, 11 Oct 2023 05:23:32 -0400 X-MC-Unique: LdxKr9qlPc2-58VRx7CHzA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id F04DD185A7B4; Wed, 11 Oct 2023 09:23:31 +0000 (UTC) Received: from secure.mitica (unknown [10.39.195.75]) by smtp.corp.redhat.com (Postfix) with ESMTP id 290491C060AE; Wed, 11 Oct 2023 09:23:30 +0000 (UTC) From: Juan Quintela To: qemu-devel@nongnu.org Cc: Laurent Vivier , Peter Xu , Paolo Bonzini , Markus Armbruster , Juan Quintela , Thomas Huth , Li Zhijian , Leonardo Bras , Eric Blake , Fabiano Rosas Subject: [PULL 42/65] migration/rdma: Convert qemu_rdma_exchange_recv() to Error Date: Wed, 11 Oct 2023 11:21:40 +0200 Message-ID: <20231011092203.1266-43-quintela@redhat.com> In-Reply-To: <20231011092203.1266-1-quintela@redhat.com> References: <20231011092203.1266-1-quintela@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.7 Received-SPF: pass client-ip=170.10.129.124; envelope-from=quintela@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=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: 2.1.29 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-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Markus Armbruster Functions that use an Error **errp parameter to return errors should not also report them to the user, because reporting is the caller's job. When the caller does, the error is reported twice. When it doesn't (because it recovered from the error), there is no error to report, i.e. the report is bogus. qio_channel_rdma_readv() violates this principle: it calls error_report() via qemu_rdma_exchange_recv(). I elected not to investigate how callers handle the error, i.e. precise impact is not known. Clean this up by converting qemu_rdma_exchange_recv() to Error. Necessitates setting an error when qemu_rdma_exchange_get_response() failed. Since this error will go away later in this series, simply use "FIXME temporary error message" there. Signed-off-by: Markus Armbruster Reviewed-by: Li Zhijian Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Message-ID: <20230928132019.2544702-36-armbru@redhat.com> --- migration/rdma.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/migration/rdma.c b/migration/rdma.c index fdb527af39..b13fec6328 100644 --- a/migration/rdma.c +++ b/migration/rdma.c @@ -1980,7 +1980,7 @@ static int qemu_rdma_exchange_send(RDMAContext *rdma, RDMAControlHeader *head, * control-channel message. */ static int qemu_rdma_exchange_recv(RDMAContext *rdma, RDMAControlHeader *head, - uint32_t expecting) + uint32_t expecting, Error **errp) { RDMAControlHeader ready = { .len = 0, @@ -1995,7 +1995,7 @@ static int qemu_rdma_exchange_recv(RDMAContext *rdma, RDMAControlHeader *head, ret = qemu_rdma_post_send_control(rdma, NULL, &ready); if (ret < 0) { - error_report("Failed to send control buffer!"); + error_setg(errp, "Failed to send control buffer!"); return -1; } @@ -2006,6 +2006,7 @@ static int qemu_rdma_exchange_recv(RDMAContext *rdma, RDMAControlHeader *head, expecting, RDMA_WRID_READY); if (ret < 0) { + error_setg(errp, "FIXME temporary error message"); return -1; } @@ -2016,7 +2017,7 @@ static int qemu_rdma_exchange_recv(RDMAContext *rdma, RDMAControlHeader *head, */ ret = qemu_rdma_post_recv_control(rdma, RDMA_WRID_READY); if (ret < 0) { - error_report("rdma migration: error posting second control recv!"); + error_setg(errp, "rdma migration: error posting second control recv!"); return -1; } @@ -2957,11 +2958,11 @@ static ssize_t qio_channel_rdma_readv(QIOChannel *ioc, /* We've got nothing at all, so lets wait for * more to arrive */ - ret = qemu_rdma_exchange_recv(rdma, &head, RDMA_CONTROL_QEMU_FILE); + ret = qemu_rdma_exchange_recv(rdma, &head, RDMA_CONTROL_QEMU_FILE, + errp); if (ret < 0) { rdma->errored = true; - error_setg(errp, "qemu_rdma_exchange_recv failed"); return -1; } @@ -3575,6 +3576,7 @@ static int qemu_rdma_registration_handle(QEMUFile *f) RDMAControlHeader blocks = { .type = RDMA_CONTROL_RAM_BLOCKS_RESULT, .repeat = 1 }; QIOChannelRDMA *rioc = QIO_CHANNEL_RDMA(qemu_file_get_ioc(f)); + Error *err = NULL; RDMAContext *rdma; RDMALocalBlocks *local; RDMAControlHeader head; @@ -3604,9 +3606,10 @@ static int qemu_rdma_registration_handle(QEMUFile *f) do { trace_qemu_rdma_registration_handle_wait(); - ret = qemu_rdma_exchange_recv(rdma, &head, RDMA_CONTROL_NONE); + ret = qemu_rdma_exchange_recv(rdma, &head, RDMA_CONTROL_NONE, &err); if (ret < 0) { + error_report_err(err); break; }