From nobody Mon Feb 9 19:06:21 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) client-ip=209.132.183.28; envelope-from=libvir-list-bounces@redhat.com; helo=mx1.redhat.com; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) smtp.mailfrom=libvir-list-bounces@redhat.com; dmarc=pass(p=none dis=none) header.from=redhat.com Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by mx.zohomail.com with SMTPS id 1534176102247412.02045306688956; Mon, 13 Aug 2018 09:01:42 -0700 (PDT) Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 0BC2A3078AA5; Mon, 13 Aug 2018 16:01:40 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 3AC367A2F7; Mon, 13 Aug 2018 16:01:39 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id 389E518037F2; Mon, 13 Aug 2018 16:01:34 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id w7DG0vvY001413 for ; Mon, 13 Aug 2018 12:00:57 -0400 Received: by smtp.corp.redhat.com (Postfix) id 1A9D52166BA5; Mon, 13 Aug 2018 16:00:57 +0000 (UTC) Received: from angien.brq.redhat.com (unknown [10.43.2.136]) by smtp.corp.redhat.com (Postfix) with ESMTP id AAC202166BA0 for ; Mon, 13 Aug 2018 16:00:56 +0000 (UTC) From: Peter Krempa To: libvir-list@redhat.com Date: Mon, 13 Aug 2018 17:59:58 +0200 Message-Id: In-Reply-To: References: In-Reply-To: References: X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 X-loop: libvir-list@redhat.com Subject: [libvirt] [PATCHv2 24/62] qemu: domain: Add infrastructure to generate block node names X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: libvir-list-bounces@redhat.com Errors-To: libvir-list-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.48]); Mon, 13 Aug 2018 16:01:41 +0000 (UTC) X-ZohoMail: RDMRC_0 RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" Node names for block objects in qemu need to be unique for an instance of the qemu process. Add a counter to generate objects sequentially and store it in the status XML so that we can restore it. The helpers added allow to create new node names and reset the counter after the VM process terminates. Signed-off-by: Peter Krempa Reviewed-by: J=EF=BF=BDn Tomko --- src/qemu/qemu_domain.c | 38 ++++++++++++++++++++++++++++++++++++++ src/qemu/qemu_domain.h | 6 ++++++ src/qemu/qemu_process.c | 3 +++ 3 files changed, 47 insertions(+) diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index e5f055f203..032ad80baa 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -2438,6 +2438,9 @@ qemuDomainObjPrivateXMLFormat(virBufferPtr buf, qemuDomainObjPrivateXMLFormatPR(buf, priv); + if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKDEV)) + virBufferAsprintf(buf, "\n", priv->nodena= meindex); + if (qemuDomainObjPrivateXMLFormatBlockjobs(buf, vm) < 0) return -1; @@ -2933,6 +2936,14 @@ qemuDomainObjPrivateXMLParse(xmlXPathContextPtr ctxt, if (qemuDomainObjPrivateXMLParseBlockjobs(priv, ctxt) < 0) goto error; + qemuDomainStorageIdReset(priv); + if (virXPathULongLong("string(./nodename/@next)", ctxt, + &priv->nodenameindex) =3D=3D -2) { + virReportError(VIR_ERR_XML_ERROR, "%s", + _("failed to parse node name index")); + goto error; + } + return 0; error: @@ -13179,3 +13190,30 @@ qemuDomainGetManagedPRSocketPath(qemuDomainObjPriv= atePtr priv) return ret; } + + +/** + * qemuDomainStorageIdNew: + * @priv: qemu VM private data object. + * + * Generate a new unique id for a storage object. Useful for node name gen= eration. + */ +unsigned int +qemuDomainStorageIdNew(qemuDomainObjPrivatePtr priv) +{ + return ++priv->nodenameindex; +} + + +/** + * qemuDomainStorageIdReset: + * @priv: qemu VM private data object. + * + * Resets the data for the node name generator. The node names need to be = unique + * for a single instance, so can be reset on VM shutdown. + */ +void +qemuDomainStorageIdReset(qemuDomainObjPrivatePtr priv) +{ + priv->nodenameindex =3D 0; +} diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h index 7b79d77257..5dcbdfbbe1 100644 --- a/src/qemu/qemu_domain.h +++ b/src/qemu/qemu_domain.h @@ -363,6 +363,9 @@ struct _qemuDomainObjPrivate { /* true if qemu-pr-helper process is running for the domain */ bool prDaemonRunning; + + /* counter for generating node names for qemu disks */ + unsigned long long nodenameindex; }; # define QEMU_DOMAIN_PRIVATE(vm) \ @@ -1063,4 +1066,7 @@ qemuDomainDiskCachemodeFlags(int cachemode, char * qemuDomainGetManagedPRSocketPath(qemuDomainObjPrivatePtr priv); +unsigned int qemuDomainStorageIdNew(qemuDomainObjPrivatePtr priv); +void qemuDomainStorageIdReset(qemuDomainObjPrivatePtr priv); + #endif /* __QEMU_DOMAIN_H__ */ diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c index ff4d992ff1..0bf8245173 100644 --- a/src/qemu/qemu_process.c +++ b/src/qemu/qemu_process.c @@ -7154,6 +7154,9 @@ void qemuProcessStop(virQEMUDriverPtr driver, /* clear all private data entries which are no longer needed */ qemuDomainObjPrivateDataClear(priv); + /* reset node name allocator */ + qemuDomainStorageIdReset(priv); + /* The "release" hook cleans up additional resources */ if (virHookPresent(VIR_HOOK_DRIVER_QEMU)) { char *xml =3D qemuDomainDefFormatXML(driver, vm->def, 0); --=20 2.16.2 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list