From nobody Tue Feb 10 01:44:02 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 1533651851814397.9824888034609; Tue, 7 Aug 2018 07:24:11 -0700 (PDT) Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 62A11308FB98; Tue, 7 Aug 2018 14:24:09 +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 27A8B27BB0; Tue, 7 Aug 2018 14:24:09 +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 CA53D1800B83; Tue, 7 Aug 2018 14:24:08 +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 w77ENJuW010477 for ; Tue, 7 Aug 2018 10:23:19 -0400 Received: by smtp.corp.redhat.com (Postfix) id ACBA12166BA2; Tue, 7 Aug 2018 14:23:19 +0000 (UTC) Received: from angien.brq.redhat.com (unknown [10.43.2.136]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4A60A2166BA0 for ; Tue, 7 Aug 2018 14:23:19 +0000 (UTC) From: Peter Krempa To: libvir-list@redhat.com Date: Tue, 7 Aug 2018 16:22:35 +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] [PATCH 44/55] qemu: monitor: Extract 'write-threshold' automatically for -blockdev 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 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.43]); Tue, 07 Aug 2018 14:24:10 +0000 (UTC) X-ZohoMail: RDMRC_0 RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" In cases when -blockdev is used we need to use 'query-named-block-nodes' instead of 'query-block'. This means that we can extract the write-threshold variable right away. To keep compatibility with old VMs modify the code which was extracting the value previously so that it updates the stats structure and a single code path then can be used to extract the data. Signed-off-by: Peter Krempa --- src/qemu/qemu_driver.c | 57 ++++++++++++++++++++++++++--------------= ---- src/qemu/qemu_monitor.h | 3 +++ src/qemu/qemu_monitor_json.c | 16 ++++++++++--- 3 files changed, 50 insertions(+), 26 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index ed0c563c85..b0ac5e536b 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -20043,29 +20043,39 @@ qemuDomainGetStatsOneBlockFallback(virQEMUDriverP= tr driver, } -static int -qemuDomainGetStatsOneBlockNode(virDomainStatsRecordPtr record, - int *maxparams, - virStorageSourcePtr src, - size_t block_idx, - virHashTablePtr nodedata) +/** + * qemuDomainGetStatsOneBlockRefreshNamed: + * @src: disk source structure + * @alias: disk alias + * @stats: hash table containing stats for all disks + * @nodedata: reply containin 'query-named-block-nodes' data + * + * Refresh disk block stats data (qemuBlockStatsPtr) which are present only + * in the reply of 'query-named-block-nodes' in cases when the data was ga= thered + * by using qem-block originally. + */ +static void +qemuDomainGetStatsOneBlockRefreshNamed(virStorageSourcePtr src, + const char *alias, + virHashTablePtr stats, + virHashTablePtr nodedata) { + qemuBlockStatsPtr entry; + virJSONValuePtr data; unsigned long long tmp; - int ret =3D -1; - if (src->nodestorage && - (data =3D virHashLookup(nodedata, src->nodestorage))) { - if (virJSONValueObjectGetNumberUlong(data, "write_threshold", &tmp= ) =3D=3D 0 && - tmp > 0) - QEMU_ADD_BLOCK_PARAM_ULL(record, maxparams, block_idx, - "threshold", tmp); - } + if (!nodedata || !src->nodestorage) + return; - ret =3D 0; + if (!(entry =3D virHashLookup(stats, alias))) + return; - cleanup: - return ret; + if (!(data =3D virHashLookup(nodedata, src->nodestorage))) + return; + + if (virJSONValueObjectGetNumberUlong(data, "write_threshold", &tmp) = =3D=3D 0) + entry->write_threshold =3D tmp; } @@ -20079,8 +20089,7 @@ qemuDomainGetStatsOneBlock(virQEMUDriverPtr driver, const char *entryname, virStorageSourcePtr src, size_t block_idx, - virHashTablePtr stats, - virHashTablePtr nodedata) + virHashTablePtr stats) { qemuBlockStats *entry; int ret =3D -1; @@ -20145,9 +20154,9 @@ qemuDomainGetStatsOneBlock(virQEMUDriverPtr driver, } } - if (qemuDomainGetStatsOneBlockNode(record, maxparams, src, block_idx, - nodedata) < 0) - goto cleanup; + if (entry->write_threshold) + QEMU_ADD_BLOCK_PARAM_ULL(record, maxparams, block_idx, "threshold", + entry->write_threshold); ret =3D 0; cleanup: @@ -20218,9 +20227,11 @@ qemuDomainGetStatsBlock(virQEMUDriverPtr driver, !(alias =3D qemuDomainStorageAlias(disk->info.alias, src->= id))) goto cleanup; + qemuDomainGetStatsOneBlockRefreshNamed(src, alias, stats, node= stats); + if (qemuDomainGetStatsOneBlock(driver, cfg, dom, record, maxpa= rams, disk->dst, alias, src, visited, - stats, nodestats) < 0) + stats) < 0) goto cleanup; VIR_FREE(alias); diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h index 3e4822c6ec..431848856a 100644 --- a/src/qemu/qemu_monitor.h +++ b/src/qemu/qemu_monitor.h @@ -583,6 +583,9 @@ struct _qemuBlockStats { * if wr_highest_offset_valid is true */ unsigned long long wr_highest_offset; bool wr_highest_offset_valid; + + /* write_threshold is valid only if it's non-zero, conforming to qemu = semantics */ + unsigned long long write_threshold; }; int qemuMonitorGetAllBlockStatsInfo(qemuMonitorPtr mon, diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c index 51d6ee2917..75f40716ea 100644 --- a/src/qemu/qemu_monitor_json.c +++ b/src/qemu/qemu_monitor_json.c @@ -2484,7 +2484,8 @@ qemuMonitorJSONGetAllBlockStatsInfo(qemuMonitorPtr mo= n, static int qemuMonitorJSONBlockStatsUpdateCapacityData(virJSONValuePtr image, const char *name, - virHashTablePtr stats) + virHashTablePtr stats, + qemuBlockStatsPtr *entry) { qemuBlockStatsPtr bstats; @@ -2498,6 +2499,9 @@ qemuMonitorJSONBlockStatsUpdateCapacityData(virJSONVa= luePtr image, } } + if (entry) + *entry =3D bstats; + /* failures can be ignored after this point */ if (virJSONValueObjectGetNumberUlong(image, "virtual-size", &bstats->capacity) < 0) @@ -2523,7 +2527,8 @@ qemuMonitorJSONBlockStatsUpdateCapacityOne(virJSONVal= uePtr image, char *entry_name =3D qemuDomainStorageAlias(dev_name, depth); virJSONValuePtr backing; - if (qemuMonitorJSONBlockStatsUpdateCapacityData(image, entry_name, sta= ts) < 0) + if (qemuMonitorJSONBlockStatsUpdateCapacityData(image, entry_name, + stats, NULL) < 0) goto cleanup; if (backingChain && @@ -2593,6 +2598,7 @@ qemuMonitorJSONBlockStatsUpdateCapacityBlockdevWorker= (size_t pos ATTRIBUTE_UNUSE virHashTablePtr stats =3D opaque; virJSONValuePtr image; const char *nodename; + qemuBlockStatsPtr entry; if (!(nodename =3D virJSONValueObjectGetString(val, "node-name")) || !(image =3D virJSONValueObjectGetObject(val, "image"))) { @@ -2601,9 +2607,13 @@ qemuMonitorJSONBlockStatsUpdateCapacityBlockdevWorke= r(size_t pos ATTRIBUTE_UNUSE return -1; } - if (qemuMonitorJSONBlockStatsUpdateCapacityData(image, nodename, stats= ) < 0) + if (qemuMonitorJSONBlockStatsUpdateCapacityData(image, nodename, stats= , &entry) < 0) return -1; + if (entry) + ignore_value(virJSONValueObjectGetNumberUlong(val, "write_threshol= d", + &entry->write_thresh= old)); + return 1; /* we don't want to steal the value from the JSON array */ } --=20 2.16.2 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list