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vcpupin: introduce a new libvirt API (virDomainPinVcpuFlags)
This patch introduces a new libvirt API virDomainPinVcpuFlags, a direct extension from the existing virDomainPinVcpu
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@ -1049,6 +1049,11 @@ int virDomainPinVcpu (virDomainPtr domain,
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unsigned int vcpu,
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unsigned char *cpumap,
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int maplen);
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int virDomainPinVcpuFlags (virDomainPtr domain,
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unsigned int vcpu,
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unsigned char *cpumap,
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int maplen,
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unsigned int flags);
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/**
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* VIR_USE_CPU:
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@ -229,6 +229,12 @@ typedef int
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unsigned int vcpu,
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unsigned char *cpumap,
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int maplen);
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typedef int
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(*virDrvDomainPinVcpuFlags) (virDomainPtr domain,
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unsigned int vcpu,
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unsigned char *cpumap,
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int maplen,
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unsigned int flags);
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typedef int
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(*virDrvDomainGetVcpus) (virDomainPtr domain,
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virVcpuInfoPtr info,
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@ -671,6 +677,7 @@ struct _virDriver {
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virDrvDomainSetVcpusFlags domainSetVcpusFlags;
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virDrvDomainGetVcpusFlags domainGetVcpusFlags;
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virDrvDomainPinVcpu domainPinVcpu;
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virDrvDomainPinVcpuFlags domainPinVcpuFlags;
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virDrvDomainGetVcpus domainGetVcpus;
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virDrvDomainGetMaxVcpus domainGetMaxVcpus;
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virDrvDomainGetSecurityLabel domainGetSecurityLabel;
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@ -6708,6 +6708,82 @@ error:
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return -1;
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}
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/**
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* virDomainPinVcpuFlags:
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* @domain: pointer to domain object, or NULL for Domain0
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* @vcpu: virtual CPU number
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* @cpumap: pointer to a bit map of real CPUs (in 8-bit bytes) (IN)
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* Each bit set to 1 means that corresponding CPU is usable.
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* Bytes are stored in little-endian order: CPU0-7, 8-15...
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* In each byte, lowest CPU number is least significant bit.
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* @maplen: number of bytes in cpumap, from 1 up to size of CPU map in
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* underlying virtualization system (Xen...).
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* If maplen < size, missing bytes are set to zero.
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* If maplen > size, failure code is returned.
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* @flags: bitwise-OR of virDomainModificationImpac
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*
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* Dynamically change the real CPUs which can be allocated to a virtual CPU.
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* This function requires privileged access to the hypervisor.
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*
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* @flags may include VIR_DOMAIN_AFFECT_LIVE or VIR_DOMAIN_AFFECT_CONFIG.
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* Both flags may be set.
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* If VIR_DOMAIN_AFFECT_LIVE is set, the change affects a running domain
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* and may fail if domain is not alive.
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* If VIR_DOMAIN_AFFECT_CONFIG is set, the change affects persistent state,
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* and will fail for transient domains. If neither flag is specified (that is,
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* @flags is VIR_DOMAIN_AFFECT_CURRENT), then an inactive domain modifies
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* persistent setup, while an active domain is hypervisor-dependent on whether
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* just live or both live and persistent state is changed.
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* Not all hypervisors can support all flag combinations.
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*
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* Returns 0 in case of success, -1 in case of failure.
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*
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*/
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int
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virDomainPinVcpuFlags(virDomainPtr domain, unsigned int vcpu,
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unsigned char *cpumap, int maplen, unsigned int flags)
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{
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virConnectPtr conn;
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VIR_DOMAIN_DEBUG(domain, "vcpu=%u, cpumap=%p, maplen=%d, flags=%u",
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vcpu, cpumap, maplen, flags);
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virResetLastError();
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if (!VIR_IS_CONNECTED_DOMAIN(domain)) {
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virLibDomainError(VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
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virDispatchError(NULL);
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return -1;
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}
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if (domain->conn->flags & VIR_CONNECT_RO) {
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virLibDomainError(VIR_ERR_OPERATION_DENIED, __FUNCTION__);
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goto error;
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}
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if ((vcpu > 32000) || (cpumap == NULL) || (maplen < 1)) {
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virLibDomainError(VIR_ERR_INVALID_ARG, __FUNCTION__);
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goto error;
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}
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conn = domain->conn;
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if (conn->driver->domainPinVcpuFlags) {
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int ret;
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ret = conn->driver->domainPinVcpuFlags (domain, vcpu, cpumap, maplen, flags);
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if (ret < 0)
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goto error;
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return ret;
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}
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virLibConnError(VIR_ERR_NO_SUPPORT, __FUNCTION__);
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error:
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virDispatchError(domain->conn);
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return -1;
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}
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/**
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* virDomainGetVcpus:
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* @domain: pointer to domain object, or NULL for Domain0
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@ -450,4 +450,9 @@ LIBVIRT_0.9.2 {
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virInterfaceChangeRollback;
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} LIBVIRT_0.9.0;
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LIBVIRT_0.9.3 {
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global:
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virDomainPinVcpuFlags;
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} LIBVIRT_0.9.2;
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# .... define new API here using predicted next version number ....
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