[libvirt] [RFC PATCH v1 3/4] xenconfig: add domxml conversions for xen-xl
Wim Ten Have
wim.ten.have at oracle.com
Mon Jun 12 18:54:50 UTC 2017
From: Wim ten Have <wim.ten.have at oracle.com>
This patch converts NUMA configurations between the Xen libxl
configuration file format and libvirt's XML format.
XML HVM domain configuration:
<cpu>
<numa>
<cell id='0' cpus='0-1' memory='2097152' unit='KiB'>
<distances>
<sibling id='0' value='10'/>
<sibling id='1' value='21'/>
<sibling id='2' value='31'/>
<sibling id='3' value='41'/>
</distances>
</cell>
<cell id='1' cpus='2-3' memory='2097152' unit='KiB'>
<distances>
<sibling id='0' value='21'/>
<sibling id='1' value='10'/>
<sibling id='2' value='21'/>
<sibling id='3' value='31'/>
</distances>
</cell>
<cell id='2' cpus='3-4' memory='2097152' unit='KiB'>
<distances>
<sibling id='0' value='31'/>
<sibling id='1' value='21'/>
<sibling id='2' value='10'/>
<sibling id='3' value='21'/>
</distances>
</cell>
<cell id='3' cpus='5-6' memory='2097152' unit='KiB'>
<distances>
<sibling id='0' value='41'/>
<sibling id='1' value='31'/>
<sibling id='2' value='21'/>
<sibling id='3' value='10'/>
</distances>
</cell>
</numa>
</cpu>
Xen xl.cfg domain configuration:
vnuma = [["pnode=0","size=2048","vcpus=0-1","vdistances=10,21,31,41"],
["pnode=1","size=2048","vcpus=2-3","vdistances=21,10,21,31"],
["pnode=2","size=2048","vcpus=4-5","vdistances=31,21,10,21"],
["pnode=3","size=2048","vcpus=6-7","vdistances=41,31,21,10"]]
If there is no XML <distances> description amongst the <cell> data the
conversion schema from xml to native will generate 10 for local and 21
for all remote instances.
Signed-off-by: Wim ten Have <wim.ten.have at oracle.com>
---
src/xenconfig/xen_xl.c | 300 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 300 insertions(+)
diff --git a/src/xenconfig/xen_xl.c b/src/xenconfig/xen_xl.c
index cac440c..0c7dd23 100644
--- a/src/xenconfig/xen_xl.c
+++ b/src/xenconfig/xen_xl.c
@@ -309,6 +309,168 @@ xenParseXLSpice(virConfPtr conf, virDomainDefPtr def)
return -1;
}
+#ifdef LIBXL_HAVE_VNUMA
+static int
+xenParseXLVnuma(virConfPtr conf, virDomainDefPtr def)
+{
+ int ret = -1;
+ char *tmp = NULL;
+ char **token = NULL;
+ size_t vcpus = 0;
+
+ virConfValuePtr list;
+ virDomainNumaPtr numa;
+
+ numa = def->numa;
+ if (numa == NULL)
+ return -1;
+
+ list = virConfGetValue(conf, "vnuma");
+ if (list && list->type == VIR_CONF_LIST) {
+ size_t nr_nodes = 0, vnodeCnt = 0;
+ virConfValuePtr vnode = list->list;
+ virCPUDefPtr cpu;
+
+ vnode = list->list;
+ while (vnode) {
+ vnode = vnode->next;
+ nr_nodes++;
+ }
+
+ if (!virDomainNumaSetNodeCount(numa, nr_nodes))
+ goto cleanup;
+
+ list = list->list;
+
+ if (VIR_ALLOC(cpu) < 0)
+ goto cleanup;
+
+ while (list) {
+
+ /* Is there a sublist (vnode)? */
+ if (list && list->type == VIR_CONF_LIST) {
+ vnode = list->list;
+
+ while (vnode && vnode->type == VIR_CONF_STRING) {
+ const char *data;
+ const char *str = vnode->str;
+
+ if (!str ||
+ !(data = strrchr(str, '='))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("vnuma vnode invalid format '%s'"),
+ str);
+ goto skipvnode;
+ }
+ data++;
+
+ if (*data) {
+ size_t len;
+ char vtoken[64];
+
+ if (STRPREFIX(str, "pnode")) {
+ unsigned int cellid;
+
+ len = strlen(data);
+ if (!virStrncpy(vtoken, data,
+ len, sizeof(vtoken))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("vnuma vnode %zu pnode '%s' too long for destination"),
+ vnodeCnt, data);
+ goto cleanup;
+ }
+
+ if ((virStrToLong_ui(vtoken, NULL, 10, &cellid) < 0) ||
+ (cellid >= nr_nodes)) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("vnuma vnode %zu invalid value pnode '%s'"),
+ vnodeCnt, data);
+ goto cleanup;
+ }
+ } else if (STRPREFIX(str, "size")) {
+ unsigned long long kbsize;
+
+ len = strlen(data);
+ if (!virStrncpy(vtoken, data,
+ len, sizeof(vtoken))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("vnuma vnode %zu size '%s' too long for destination"),
+ vnodeCnt, data);
+ goto cleanup;
+ }
+
+ if (virStrToLong_ull(vtoken, NULL, 10, &kbsize) < 0)
+ goto cleanup;
+
+ virDomainNumaSetNodeMemorySize(numa, vnodeCnt, (kbsize * 1024));
+ } else if (STRPREFIX(str, "vcpus")) {
+ virBitmapPtr cpumask = NULL;
+
+ len = strlen(data);
+ if (!virStrncpy(vtoken, data,
+ len, sizeof(vtoken))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("vnuma vnode %zu vcpus '%s' too long for destination"),
+ vnodeCnt, data);
+ goto cleanup;
+ }
+
+ if ((virBitmapParse(vtoken, &cpumask, VIR_DOMAIN_CPUMASK_LEN) < 0) ||
+ (virDomainNumaSetNodeCpumask(numa, vnodeCnt, cpumask) == NULL))
+ goto cleanup;
+
+ vcpus += virBitmapCountBits(cpumask);
+ } else if (STRPREFIX(str, "vdistances")) {
+ size_t i, ndistances;
+ unsigned int value;
+
+ len = strlen(data);
+ if (!virStrncpy(vtoken, data,
+ len, sizeof(vtoken))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("vnuma vnode %zu vdistances '%s' too long for destination"),
+ vnodeCnt, data);
+ }
+
+ if (VIR_STRDUP(tmp, vtoken) < 0)
+ goto cleanup;
+
+ if (!(token = virStringSplitCount(tmp, ",", 0, &ndistances)) ||
+ (virDomainNumaSetNodeDistanceCount(numa, vnodeCnt, ndistances) != ndistances))
+ goto cleanup;
+
+ for (i = 0; i < ndistances; i++) {
+ if ((virStrToLong_ui(token[i], NULL, 10, &value) < 0) ||
+ (virDomainNumaSetNodeDistance(numa, vnodeCnt, i, value) != value))
+ goto cleanup;
+ }
+ } else {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("vnuma vnode %zu invalid token '%s'"),
+ vnodeCnt, str);
+ goto cleanup;
+ }
+ }
+ skipvnode:
+ vnode = vnode->next;
+ }
+ }
+ list = list->next;
+ vnodeCnt++;
+ }
+ cpu->type = VIR_CPU_TYPE_GUEST;
+ def->cpu = cpu;
+ }
+
+ ret = 0;
+
+ cleanup:
+ virStringListFree(token);
+ VIR_FREE(tmp);
+
+ return ret;
+}
+#endif
static int
xenParseXLDiskSrc(virDomainDiskDefPtr disk, char *srcstr)
@@ -863,6 +1025,11 @@ xenParseXL(virConfPtr conf,
if (xenParseXLOS(conf, def, caps) < 0)
goto cleanup;
+#ifdef LIBXL_HAVE_VNUMA
+ if (xenParseXLVnuma(conf, def) < 0)
+ goto cleanup;
+#endif
+
if (xenParseXLDisk(conf, def) < 0)
goto cleanup;
@@ -1005,6 +1172,134 @@ xenFormatXLOS(virConfPtr conf, virDomainDefPtr def)
return 0;
}
+#ifdef LIBXL_HAVE_VNUMA
+static int
+xenFormatXLVnode(virConfValuePtr list, virBufferPtr buf)
+{
+ int ret = -1;
+ virConfValuePtr numaPnode, tmp;
+
+ if (virBufferCheckError(buf) < 0)
+ goto cleanup;
+
+ if (VIR_ALLOC(numaPnode) < 0)
+ goto cleanup;
+
+ /* Place VNODE directive */
+ numaPnode->type = VIR_CONF_STRING;
+ numaPnode->str = virBufferContentAndReset(buf);
+
+ tmp = list->list;
+ while (tmp && tmp->next)
+ tmp = tmp->next;
+ if (tmp)
+ tmp->next = numaPnode;
+ else
+ list->list = numaPnode;
+ ret = 0;
+
+ cleanup:
+ virBufferFreeAndReset(buf);
+ return ret;
+}
+
+static int
+xenFormatXLVnuma(virConfValuePtr list,
+ virDomainNumaPtr numa, size_t node, size_t nr_nodes)
+{
+ int ret = -1;
+ size_t i;
+
+ virBuffer buf = VIR_BUFFER_INITIALIZER;
+ virConfValuePtr numaVnode, tmp;
+
+ size_t nodeSize = virDomainNumaGetNodeMemorySize(numa, node) / 1024;
+ char *nodeVcpus = virBitmapFormat(virDomainNumaGetNodeCpumask(numa, node));
+
+ if (VIR_ALLOC(numaVnode) < 0)
+ goto cleanup;
+
+ numaVnode->type = VIR_CONF_LIST;
+ numaVnode->list = NULL;
+
+ /* pnode */
+ virBufferAsprintf(&buf, "pnode=%ld", node);
+ xenFormatXLVnode(numaVnode, &buf);
+
+ /* size */
+ virBufferAsprintf(&buf, "size=%ld", nodeSize);
+ xenFormatXLVnode(numaVnode, &buf);
+
+ /* vcpus */
+ virBufferAsprintf(&buf, "vcpus=%s", nodeVcpus);
+ xenFormatXLVnode(numaVnode, &buf);
+
+ /* distances */
+ virBufferAddLit(&buf, "vdistances=");
+ for (i = 0; i < nr_nodes; i++) {
+ /*
+ * Present the configured distance value. If not
+ * available set 10 for local or 21 for remote nodes.
+ */
+ virBufferAsprintf(&buf, "%zu",
+ virDomainNumaGetNodeDistance(numa, node, i) ?: (node == i ? 10 : 21));
+ if ((nr_nodes - i) > 1)
+ virBufferAddLit(&buf, ",");
+ }
+ xenFormatXLVnode(numaVnode, &buf);
+
+ tmp = list->list;
+ while (tmp && tmp->next)
+ tmp = tmp->next;
+ if (tmp)
+ tmp->next = numaVnode;
+ else
+ list->list = numaVnode;
+ ret = 0;
+
+ cleanup:
+ VIR_FREE(nodeVcpus);
+ return ret;
+}
+
+static int
+xenFormatXLDomainVnuma(virConfPtr conf, virDomainDefPtr def)
+{
+ virDomainNumaPtr numa = def->numa;
+ virConfValuePtr vnumaVal;
+ size_t i;
+ size_t nr_nodes;
+
+ if (numa == NULL)
+ return -1;
+
+ if (VIR_ALLOC(vnumaVal) < 0)
+ return -1;
+
+ vnumaVal->type = VIR_CONF_LIST;
+ vnumaVal->list = NULL;
+
+ nr_nodes = virDomainNumaGetNodeCount(numa);
+ for (i = 0; i < nr_nodes; i++) {
+ if (xenFormatXLVnuma(vnumaVal, numa, i, nr_nodes) < 0)
+ goto cleanup;
+ }
+
+ if (vnumaVal->list != NULL) {
+ int ret = virConfSetValue(conf, "vnuma", vnumaVal);
+ vnumaVal = NULL;
+ if (ret < 0)
+ return -1;
+ }
+ VIR_FREE(vnumaVal);
+
+ return 0;
+
+ cleanup:
+ virConfFreeValue(vnumaVal);
+ return -1;
+}
+#endif
static char *
xenFormatXLDiskSrcNet(virStorageSourcePtr src)
@@ -1641,6 +1936,11 @@ xenFormatXL(virDomainDefPtr def, virConnectPtr conn)
if (xenFormatXLOS(conf, def) < 0)
goto cleanup;
+#ifdef LIBXL_HAVE_VNUMA
+ if (xenFormatXLDomainVnuma(conf, def) < 0)
+ goto cleanup;
+#endif
+
if (xenFormatXLDomainDisks(conf, def) < 0)
goto cleanup;
--
2.9.4
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