[PATCH 06/12] migration/migration-pin: get cpumap from migration.pin
From: zhengchuan <zhengchuan(a)huawei.com>
Add qemuProcessGetPcpumap to get cpumap from migration
parameters when 'virsh migrationpin' is not called.
Signed-off-by:zhengchuan<zhengchuan@huawei.com>
---
src/qemu/qemu_process.c | 79 +++++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_process.h | 4 +++
2 files changed, 83 insertions(+)
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index b6adcf2f2a..b2e9456b98 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -3677,6 +3677,85 @@ qemuProcessRecoverMigration(virQEMUDriver *driver,
}
+unsigned char *
+virParseCPUList(int *cpumaplen, const char *cpulist, int maxcpu)
+{
+ int lastcpu;
+ unsigned char *cpumap = NULL;
+ virBitmap *map = NULL;
+
+ if (cpulist[0] == 'r') {
+ map = virBitmapNew(maxcpu);
+ if (!map)
+ return NULL;
+ virBitmapSetAll(map);
+ } else {
+ if (virBitmapParse(cpulist, &map, 1024) < 0 ||
+ virBitmapIsAllClear(map)) {
+ goto cleanup;
+ }
+
+ lastcpu = virBitmapLastSetBit(map);
+ if (lastcpu >= maxcpu)
+ goto cleanup;
+ }
+
+ if (virBitmapToData(map, &cpumap, cpumaplen) < 0)
+ VIR_ERROR(_("Bitmap to data failure"));
+
+ cleanup:
+ virBitmapFree(map);
+ return cpumap;
+}
+
+
+/*
+ * The value of "virsh migrationpin" is saved to priv->pcpumap
+ * If priv->pcpumap is NULL, it means migrationpin command is not called,
+ * otherwise we set the affinity of migration thread by migrationpin
+ */
+static virBitmap*
+qemuProcessGetPcpumap(qemuDomainObjPrivate *priv)
+{
+ int cpumaplen = 0;
+ int maxcpu = 0;
+ virBitmap *pcpumap = NULL;
+ g_autofree unsigned char *cpumap = NULL;
+
+ if (priv->pcpumap)
+ return priv->pcpumap;
+
+ if (!(priv->migrationThreadPinList) || STREQ(priv->migrationThreadPinList,
"")) {
+ VIR_ERROR(_("didn't set the migratin thread pin"));
+ return NULL;
+ }
+
+ /* judge whether set_migration_pin is default value or not */
+ if (STREQ(priv->migrationThreadPinList, "none"))
+ return NULL;
+
+ maxcpu = virHostCPUGetCount();
+ if (maxcpu < 0) {
+ VIR_ERROR(_("get the cpu count of host failure"));
+ return NULL;
+ }
+
+ cpumap = virParseCPUList(&cpumaplen, priv->migrationThreadPinList, maxcpu);
+ if (!cpumap) {
+ VIR_ERROR(_("parse migration.pin param failure : migration.pin = %s"),
+ priv->migrationThreadPinList);
+ return NULL;
+ }
+
+ if (!(pcpumap = virBitmapNewData(cpumap, cpumaplen))) {
+ VIR_ERROR(_("Bitmap data failure"));
+ return NULL;
+ }
+
+ return pcpumap;
+}
+
+
static int
qemuProcessRecoverJob(virQEMUDriver *driver,
virDomainObj *vm,
diff --git a/src/qemu/qemu_process.h b/src/qemu/qemu_process.h
index 9a24745f15..5b1e05b1f8 100644
--- a/src/qemu/qemu_process.h
+++ b/src/qemu/qemu_process.h
@@ -242,3 +242,7 @@ bool qemuProcessRebootAllowed(const virDomainDef *def);
void qemuProcessCleanupMigrationJob(virQEMUDriver *driver,
virDomainObj *vm);
+
+unsigned char *virParseCPUList(int *cpumaplen,
+ const char *cpulist,
+ int maxcpu);
--
2.33.0