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From 7322bb9f51c7c2c35d2e65734e03ff0056b5af22 Mon Sep 17 00:00:00 2001
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Message-Id: <7322bb9f51c7c2c35d2e65734e03ff0056b5af22@dist-git>
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From: Peter Krempa <pkrempa@redhat.com>
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Date: Mon, 16 Mar 2020 22:12:22 +0100
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Subject: [PATCH] qemu: blockjob: Store list of bitmaps disabled prior to
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commit
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Starting a commit job will require disabling bitmaps in the base image
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so that they are not dirtied by the commit job. We need to store a list
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of the bitmaps so that we can later re-enable them.
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Add a field and status XML handling code as well as a test.
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Signed-off-by: Peter Krempa <pkrempa@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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(cherry picked from commit 41de7230ab169e80237f3e3a29bfecd9baf1a578)
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https://bugzilla.redhat.com/show_bug.cgi?id=1799013
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Message-Id: <f009cdda8b29df504d19bddffea5638913f8c931.1584391727.git.pkrempa@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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---
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src/qemu/qemu_blockjob.h | 2 ++
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src/qemu/qemu_domain.c | 26 +++++++++++++++++++
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.../blockjob-blockdev-in.xml | 4 +++
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3 files changed, 32 insertions(+)
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diff --git a/src/qemu/qemu_blockjob.h b/src/qemu/qemu_blockjob.h
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index 4045878568..c1d95ea3d8 100644
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--- a/src/qemu/qemu_blockjob.h
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+++ b/src/qemu/qemu_blockjob.h
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@@ -88,6 +88,8 @@ struct _qemuBlockJobCommitData {
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virStorageSourcePtr top;
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virStorageSourcePtr base;
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bool deleteCommittedImages;
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+ char **disabledBitmapsBase; /* a NULL-terminated list of bitmap names which
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+ were disabled in @base for the commit job */
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};
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diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
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index 0faf042145..a273aefa6b 100644
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--- a/src/qemu/qemu_domain.c
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+++ b/src/qemu/qemu_domain.c
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@@ -2603,6 +2603,9 @@ static void
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qemuDomainPrivateBlockJobFormatCommit(qemuBlockJobDataPtr job,
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virBufferPtr buf)
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{
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+ g_auto(virBuffer) disabledBitmapsBuf = VIR_BUFFER_INIT_CHILD(buf);
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+ char **bitmaps = job->data.commit.disabledBitmapsBase;
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+
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if (job->data.commit.base)
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virBufferAsprintf(buf, "<base node='%s'/>\n", job->data.commit.base->nodeformat);
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@@ -2614,6 +2617,11 @@ qemuDomainPrivateBlockJobFormatCommit(qemuBlockJobDataPtr job,
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if (job->data.commit.deleteCommittedImages)
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virBufferAddLit(buf, "<deleteCommittedImages/>\n");
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+
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+ while (bitmaps && *bitmaps)
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+ virBufferEscapeString(&disabledBitmapsBuf, "<bitmap name='%s'/>\n", *(bitmaps++));
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+
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+ virXMLFormatElement(buf, "disabledBaseBitmaps", NULL, &disabledBitmapsBuf);
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}
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@@ -3240,6 +3248,9 @@ static int
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qemuDomainObjPrivateXMLParseBlockjobDataCommit(qemuBlockJobDataPtr job,
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xmlXPathContextPtr ctxt)
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{
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+ g_autofree xmlNodePtr *nodes = NULL;
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+ ssize_t nnodes;
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+
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if (job->type == QEMU_BLOCKJOB_TYPE_COMMIT) {
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qemuDomainObjPrivateXMLParseBlockjobNodename(job,
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"string(./topparent/@node)",
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@@ -3266,6 +3277,21 @@ qemuDomainObjPrivateXMLParseBlockjobDataCommit(qemuBlockJobDataPtr job,
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!job->data.commit.base)
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return -1;
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+ if ((nnodes = virXPathNodeSet("./disabledBaseBitmaps/bitmap", ctxt, &nodes)) > 0) {
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+ size_t i;
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+
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+ job->data.commit.disabledBitmapsBase = g_new0(char *, nnodes + 1);
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+
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+ for (i = 0; i < nnodes; i++) {
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+ char *tmp;
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+
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+ if (!(tmp = virXMLPropString(nodes[i], "name")))
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+ return -1;
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+
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+ job->data.commit.disabledBitmapsBase[i] = g_steal_pointer(&tmp);
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+ }
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+ }
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+
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return 0;
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}
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diff --git a/tests/qemustatusxml2xmldata/blockjob-blockdev-in.xml b/tests/qemustatusxml2xmldata/blockjob-blockdev-in.xml
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index ca6d110179..cc17a17ff4 100644
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--- a/tests/qemustatusxml2xmldata/blockjob-blockdev-in.xml
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+++ b/tests/qemustatusxml2xmldata/blockjob-blockdev-in.xml
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@@ -243,6 +243,10 @@
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<base node='libvirt-19-format'/>
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<top node='libvirt-17-format'/>
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<deleteCommittedImages/>
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+ <disabledBaseBitmaps>
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+ <bitmap name='test'/>
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+ <bitmap name='test1'/>
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+ </disabledBaseBitmaps>
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</blockjob>
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<blockjob name='create-libvirt-1337-storage' type='create' state='running'>
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<create mode='storage'/>
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--
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2.25.1
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