[libvirt] [PATCH 3/3] lxc: Implement geting emulator pin info API in lxc driver
From: Yue Wenyuan <yuewenyuan(a)huawei.com>
Implement the lxc driver method for virDomainGetEmulatorPinInfo
to get container's cpuset.
Signed-off-by: Wang Rui <moon.wangrui(a)huawei.com>
Signed-off-by: Yue Wenyuan <yuewenyuan(a)huawei.com>
---
src/lxc/lxc_driver.c | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 75 insertions(+)
diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index 9e3a877..6694cf3 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -1395,6 +1395,80 @@ lxcDomainPinEmulator(virDomainPtr dom,
return ret;
}
+static int
+lxcDomainGetEmulatorPinInfo(virDomainPtr dom,
+ unsigned char *cpumaps,
+ int maplen,
+ unsigned int flags)
+{
+ virLXCDriverPtr driver = dom->conn->privateData;
+ virDomainObjPtr vm = NULL;
+ virDomainDefPtr targetDef = NULL;
+ int ret = -1;
+ int maxcpu, hostcpus, pcpu;
+ virBitmapPtr cpumask = NULL;
+ bool pinned;
+ virCapsPtr caps = NULL;
+
+ virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
+ VIR_DOMAIN_AFFECT_CONFIG, -1);
+
+ if (!(vm = lxcDomObjFromDomain(dom)))
+ goto cleanup;
+
+ if (virDomainGetEmulatorPinInfoEnsureACL(dom->conn, vm->def) < 0)
+ goto cleanup;
+
+ if (!(caps = virLXCDriverGetCapabilities(driver, false)))
+ goto cleanup;
+
+ if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt,
+ vm, &flags, &targetDef) < 0)
+ goto cleanup;
+
+ if (flags & VIR_DOMAIN_AFFECT_LIVE)
+ targetDef = vm->def;
+
+ sa_assert(targetDef);
+
+ if ((hostcpus = nodeGetCPUCount()) < 0)
+ goto cleanup;
+
+ maxcpu = maplen * 8;
+ if (maxcpu > hostcpus)
+ maxcpu = hostcpus;
+
+ /* initialize cpumaps */
+ memset(cpumaps, 0xff, maplen);
+ if (maxcpu % 8) {
+ cpumaps[maplen - 1] &= (1 << maxcpu % 8) - 1;
+ }
+
+ if (targetDef->cputune.emulatorpin) {
+ cpumask = targetDef->cputune.emulatorpin->cpumask;
+ } else if (targetDef->cpumask) {
+ cpumask = targetDef->cpumask;
+ } else {
+ ret = 0;
+ goto cleanup;
+ }
+
+ for (pcpu = 0; pcpu < maxcpu; pcpu++) {
+ if (virBitmapGetBit(cpumask, pcpu, &pinned) < 0)
+ goto cleanup;
+ if (!pinned)
+ VIR_UNUSE_CPU(cpumaps, pcpu);
+ }
+
+ ret = 1;
+
+ cleanup:
+ if (vm)
+ virObjectUnlock(vm);
+ virObjectUnref(caps);
+ return ret;
+}
+
static int lxcDomainGetSecurityLabel(virDomainPtr dom, virSecurityLabelPtr seclabel)
{
virLXCDriverPtr driver = dom->conn->privateData;
@@ -5831,6 +5905,7 @@ static virDriver lxcDriver = {
.domainCreateXML = lxcDomainCreateXML, /* 0.4.4 */
.domainCreateXMLWithFiles = lxcDomainCreateXMLWithFiles, /* 1.1.1 */
.domainPinEmulator = lxcDomainPinEmulator, /*1.2.9*/
+ .domainGetEmulatorPinInfo = lxcDomainGetEmulatorPinInfo, /*1.2.9*/
.domainLookupByID = lxcDomainLookupByID, /* 0.4.2 */
.domainLookupByUUID = lxcDomainLookupByUUID, /* 0.4.2 */
.domainLookupByName = lxcDomainLookupByName, /* 0.4.2 */
--
1.7.12.4