[PATCH 03/13] qemu: blockjob: Store list of bitmaps disabled prior to commit

Starting a commit job will require disabling bitmaps in the base image so that they are not dirtied by the commit job. We need to store a list of the bitmaps so that we can later re-enable them. Add a field and status XML handling code as well as a test. Signed-off-by: Peter Krempa <pkrempa(a)redhat.com&gt; --- src/qemu/qemu_blockjob.h | 2 ++ src/qemu/qemu_domain.c | 26 +++++++++++++++++++ .../blockjob-blockdev-in.xml | 4 +++ 3 files changed, 32 insertions(+) diff --git a/src/qemu/qemu_blockjob.h b/src/qemu/qemu_blockjob.h index 72c7fa053e..e2e28ca4d3 100644 --- a/src/qemu/qemu_blockjob.h +++ b/src/qemu/qemu_blockjob.h @@ -88,6 +88,8 @@ struct _qemuBlockJobCommitData { virStorageSourcePtr top; virStorageSourcePtr base; bool deleteCommittedImages; + char **disabledBitmapsBase; /* a NULL-terminated list of bitmap names which + were disabled in @base for the commit job */ }; diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 0a478d2080..c5f4b0ae7f 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -2534,6 +2534,9 @@ static void qemuDomainPrivateBlockJobFormatCommit(qemuBlockJobDataPtr job, virBufferPtr buf) { + g_auto(virBuffer) disabledBitmapsBuf = VIR_BUFFER_INIT_CHILD(buf); + char **bitmaps = job->data.commit.disabledBitmapsBase; + if (job->data.commit.base) virBufferAsprintf(buf, "<base node='%s'/>\n", job->data.commit.base->nodeformat); @@ -2545,6 +2548,11 @@ qemuDomainPrivateBlockJobFormatCommit(qemuBlockJobDataPtr job, if (job->data.commit.deleteCommittedImages) virBufferAddLit(buf, "<deleteCommittedImages/>\n"); + + while (bitmaps && *bitmaps) + virBufferEscapeString(&disabledBitmapsBuf, "<bitmap name='%s'/>\n", *(bitmaps++)); + + virXMLFormatElement(buf, "disabledBaseBitmaps", NULL, &disabledBitmapsBuf); } @@ -3157,6 +3165,9 @@ static int qemuDomainObjPrivateXMLParseBlockjobDataCommit(qemuBlockJobDataPtr job, xmlXPathContextPtr ctxt) { + g_autofree xmlNodePtr *nodes = NULL; + ssize_t nnodes; + if (job->type == QEMU_BLOCKJOB_TYPE_COMMIT) { qemuDomainObjPrivateXMLParseBlockjobNodename(job, "string(./topparent/@node)", @@ -3183,6 +3194,21 @@ qemuDomainObjPrivateXMLParseBlockjobDataCommit(qemuBlockJobDataPtr job, !job->data.commit.base) return -1; + if ((nnodes = virXPathNodeSet("./disabledBaseBitmaps/bitmap", ctxt, &nodes)) > 0) { + size_t i; + + job->data.commit.disabledBitmapsBase = g_new0(char *, nnodes + 1); + + for (i = 0; i < nnodes; i++) { + char *tmp; + + if (!(tmp = virXMLPropString(nodes[i], "name"))) + return -1; + + job->data.commit.disabledBitmapsBase[i] = g_steal_pointer(&tmp); + } + } + return 0; } diff --git a/tests/qemustatusxml2xmldata/blockjob-blockdev-in.xml b/tests/qemustatusxml2xmldata/blockjob-blockdev-in.xml index ca6d110179..cc17a17ff4 100644 --- a/tests/qemustatusxml2xmldata/blockjob-blockdev-in.xml +++ b/tests/qemustatusxml2xmldata/blockjob-blockdev-in.xml @@ -243,6 +243,10 @@ <base node='libvirt-19-format'/> <top node='libvirt-17-format'/> <deleteCommittedImages/> + <disabledBaseBitmaps> + <bitmap name='test'/> + <bitmap name='test1'/> + </disabledBaseBitmaps> </blockjob> <blockjob name='create-libvirt-1337-storage' type='create' state='running'> <create mode='storage'/> -- 2.24.1