From nobody Mon Feb 9 16:50:39 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1658161972; cv=none; d=zohomail.com; s=zohoarc; b=dMzf9liNfWkhOfUNN3R7HGm9PcCD8SgUqZllQdjD2hC8plDsnyjLSm8JR3Dklgy64k3OpG7wSBk1wcFQMrlKEcS0nPy4/ciFMeS+HjdLQiSIRKLo6ytWwX9eB8Q7FNvIEtiE6bxNt07NjgF7Smdi7foUFL3Ftg4mKwThy3dAQUM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1658161972; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=SY4uOSurJb50Ktur25r2lnR0+fQOyPTJr8+ul3XGsZo=; b=ZP1Nla0uV4KjhqMv7Wx1x1xz2wqGnXZB+nnJLX408RDEKqqmFE8Ym8LKd4GOvpCSgd3ZTG5cSvxxdnBerCPf0ZUD1uwGLSIob0kmypNntyNwsJA6WY9mOI3cwLYICYBVGDuxWTLhkc63SaPffyV/5dE98BdZsPgtAsbssFv1oWg= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1658161972414349.35165047181795; Mon, 18 Jul 2022 09:32:52 -0700 (PDT) Received: from localhost ([::1]:38226 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oDTft-0003rL-Mz for importer@patchew.org; Mon, 18 Jul 2022 12:32:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59946) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oDTd6-0001Ua-CS for qemu-devel@nongnu.org; Mon, 18 Jul 2022 12:29:56 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:36608) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oDTd3-0001l0-3h for qemu-devel@nongnu.org; Mon, 18 Jul 2022 12:29:54 -0400 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-49-mWLSrRgVPLW4-2EO8JJUmw-1; Mon, 18 Jul 2022 12:29:49 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id B51741019C9D; Mon, 18 Jul 2022 16:29:48 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.192.81]) by smtp.corp.redhat.com (Postfix) with ESMTP id 01C0540D2962; Mon, 18 Jul 2022 16:29:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1658161792; 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=SY4uOSurJb50Ktur25r2lnR0+fQOyPTJr8+ul3XGsZo=; b=bCO7SYvwFmiz3JLjPYPrTiAqePqHFPxtqz60yYAfGMQg9SW3DhW+fuf9MeTqp6kul1sAYU KtL6vDG3DFiP+jsyt5mc6N0btuEpx2RBfLfme9PV6i9sS2Ryab/VpCB6DaWX49AEMsPmI+ /CdkvyPK0ZZLJStIA9D7f30oIf+5R60= X-MC-Unique: mWLSrRgVPLW4-2EO8JJUmw-1 From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= To: qemu-devel@nongnu.org Cc: Cindy Lu , Harpreet Singh Anand , "Michael S. Tsirkin" , Markus Armbruster , Laurent Vivier , Liuxiangdong , Eric Blake , Paolo Bonzini , Cornelia Huck , Stefan Hajnoczi , Gautam Dawar , "Gonglei (Arei)" , Zhu Lingshan , Parav Pandit , Stefano Garzarella , Eli Cohen , Jason Wang Subject: [PATCH v2 1/5] vhost: stop transfer elem ownership in vhost_handle_guest_kick Date: Mon, 18 Jul 2022 18:29:34 +0200 Message-Id: <20220718162938.2938783-2-eperezma@redhat.com> In-Reply-To: <20220718162938.2938783-1-eperezma@redhat.com> References: <20220718162938.2938783-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.84 on 10.11.54.2 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=eperezma@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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1658161974863100001 It was easier to allow vhost_svq_add to handle the memory. Now that we will move SVQDesc to an opaque context, it's better to handle it in the caller. Signed-off-by: Eugenio P=C3=A9rez --- hw/virtio/vhost-shadow-virtqueue.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-vi= rtqueue.c index 1646d3cb40..1a50faceb7 100644 --- a/hw/virtio/vhost-shadow-virtqueue.c +++ b/hw/virtio/vhost-shadow-virtqueue.c @@ -233,9 +233,6 @@ static void vhost_svq_kick(VhostShadowVirtqueue *svq) /** * Add an element to a SVQ. * - * The caller must check that there is enough slots for the new element. It - * takes ownership of the element: In case of failure not ENOSPC, it is fr= ee. - * * Return -EINVAL if element is invalid, -ENOSPC if dev queue is full */ int vhost_svq_add(VhostShadowVirtqueue *svq, const struct iovec *out_sg, @@ -252,7 +249,6 @@ int vhost_svq_add(VhostShadowVirtqueue *svq, const stru= ct iovec *out_sg, =20 ok =3D vhost_svq_add_split(svq, out_sg, out_num, in_sg, in_num, &qemu_= head); if (unlikely(!ok)) { - g_free(elem); return -EINVAL; } =20 @@ -293,7 +289,7 @@ static void vhost_handle_guest_kick(VhostShadowVirtqueu= e *svq) virtio_queue_set_notification(svq->vq, false); =20 while (true) { - VirtQueueElement *elem; + g_autofree VirtQueueElement *elem; int r; =20 if (svq->next_guest_avail_elem) { @@ -324,12 +320,14 @@ static void vhost_handle_guest_kick(VhostShadowVirtqu= eue *svq) * queue the current guest descriptor and ignore kicks * until some elements are used. */ - svq->next_guest_avail_elem =3D elem; + svq->next_guest_avail_elem =3D g_steal_pointer(&elem); } =20 /* VQ is full or broken, just return and ignore kicks */ return; } + /* elem belongs to SVQ or external caller now */ + elem =3D NULL; } =20 virtio_queue_set_notification(svq->vq, true); --=20 2.31.1