12:54 a.m.
This patch introduces a new libvirt API (virDomainPinVcpuFlags).
Signd-off-by: Taku Izumi <izumi.taku(a)jp.fujitsu.com>
---
include/libvirt/libvirt.h.in | 5 ++
src/driver.h | 7 +++
src/libvirt.c | 76 +++++++++++++++++++++++++++++++++++++++++++
src/libvirt_public.syms | 5 ++
4 files changed, 93 insertions(+)
Index: libvirt/include/libvirt/libvirt.h.in
===================================================================
--- libvirt.orig/include/libvirt/libvirt.h.in
+++ libvirt/include/libvirt/libvirt.h.in
@@ -1049,6 +1049,11 @@ int virDomainPinVcpu
unsigned int vcpu,
unsigned char *cpumap,
int maplen);
+int virDomainPinVcpuFlags (virDomainPtr domain,
+ unsigned int vcpu,
+ unsigned char *cpumap,
+ int maplen,
+ unsigned int flags);
/**
* VIR_USE_CPU:
Index: libvirt/src/driver.h
===================================================================
--- libvirt.orig/src/driver.h
+++ libvirt/src/driver.h
@@ -230,6 +230,12 @@ typedef int
unsigned char *cpumap,
int maplen);
typedef int
+ (*virDrvDomainPinVcpuFlags) (virDomainPtr domain,
+ unsigned int vcpu,
+ unsigned char *cpumap,
+ int maplen,
+ unsigned int flags);
+typedef int
(*virDrvDomainGetVcpus) (virDomainPtr domain,
virVcpuInfoPtr info,
int maxinfo,
@@ -671,6 +677,7 @@ struct _virDriver {
virDrvDomainSetVcpusFlags domainSetVcpusFlags;
virDrvDomainGetVcpusFlags domainGetVcpusFlags;
virDrvDomainPinVcpu domainPinVcpu;
+ virDrvDomainPinVcpuFlags domainPinVcpuFlags;
virDrvDomainGetVcpus domainGetVcpus;
virDrvDomainGetMaxVcpus domainGetMaxVcpus;
virDrvDomainGetSecurityLabel domainGetSecurityLabel;
Index: libvirt/src/libvirt.c
===================================================================
--- libvirt.orig/src/libvirt.c
+++ libvirt/src/libvirt.c
@@ -6709,6 +6709,82 @@ error:
}
/**
+ * virDomainPinVcpuFlags:
+ * @domain: pointer to domain object, or NULL for Domain0
+ * @vcpu: virtual CPU number
+ * @cpumap: pointer to a bit map of real CPUs (in 8-bit bytes) (IN)
+ * Each bit set to 1 means that corresponding CPU is usable.
+ * Bytes are stored in little-endian order: CPU0-7, 8-15...
+ * In each byte, lowest CPU number is least significant bit.
+ * @maplen: number of bytes in cpumap, from 1 up to size of CPU map in
+ * underlying virtualization system (Xen...).
+ * If maplen < size, missing bytes are set to zero.
+ * If maplen > size, failure code is returned.
+ * @flags: bitwise-OR of virDomainModificationImpac
+ *
+ * Dynamically change the real CPUs which can be allocated to a virtual CPU.
+ * This function requires privileged access to the hypervisor.
+ *
+ * @flags may include VIR_DOMAIN_AFFECT_LIVE or VIR_DOMAIN_AFFECT_CONFIG.
+ * Both flags may be set.
+ * If VIR_DOMAIN_AFFECT_LIVE is set, the change affects a running domain
+ * and may fail if domain is not alive.
+ * If VIR_DOMAIN_AFFECT_CONFIG is set, the change affects persistent state,
+ * and will fail for transient domains. If neither flag is specified (that is,
+ * @flags is VIR_DOMAIN_AFFECT_CURRENT), then an inactive domain modifies
+ * persistent setup, while an active domain is hypervisor-dependent on whether
+ * just live or both live and persistent state is changed.
+ * Not all hypervisors can support all flag combinations.
+ *
+ * Returns 0 in case of success, -1 in case of failure.
+ *
+ */
+int
+virDomainPinVcpuFlags(virDomainPtr domain, unsigned int vcpu,
+ unsigned char *cpumap, int maplen, unsigned int flags)
+{
+ virConnectPtr conn;
+
+ VIR_DOMAIN_DEBUG(domain, "vcpu=%u, cpumap=%p, maplen=%d, flags=%u",
+ vcpu, cpumap, maplen, flags);
+
+ virResetLastError();
+
+ if (!VIR_IS_CONNECTED_DOMAIN(domain)) {
+ virLibDomainError(VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
+ virDispatchError(NULL);
+ return -1;
+ }
+
+ if (domain->conn->flags & VIR_CONNECT_RO) {
+ virLibDomainError(VIR_ERR_OPERATION_DENIED, __FUNCTION__);
+ goto error;
+ }
+
+ if ((vcpu > 32000) || (cpumap == NULL) || (maplen < 1)) {
+ virLibDomainError(VIR_ERR_INVALID_ARG, __FUNCTION__);
+ goto error;
+ }
+
+ conn = domain->conn;
+
+ if (conn->driver->domainPinVcpuFlags) {
+ int ret;
+ ret = conn->driver->domainPinVcpuFlags (domain, vcpu, cpumap, maplen,
flags);
+ if (ret < 0)
+ goto error;
+ return ret;
+ }
+
+ virLibConnError(VIR_ERR_NO_SUPPORT, __FUNCTION__);
+
+error:
+ virDispatchError(domain->conn);
+ return -1;
+
+}
+
+/**
* virDomainGetVcpus:
* @domain: pointer to domain object, or NULL for Domain0
* @info: pointer to an array of virVcpuInfo structures (OUT)
Index: libvirt/src/libvirt_public.syms
===================================================================
--- libvirt.orig/src/libvirt_public.syms
+++ libvirt/src/libvirt_public.syms
@@ -450,4 +450,9 @@ LIBVIRT_0.9.2 {
virInterfaceChangeRollback;
} LIBVIRT_0.9.0;
+LIBVIRT_0.9.3 {
+ global:
+ virDomainPinVcpuFlags;
+} LIBVIRT_0.9.2;
+
# .... define new API here using predicted next version number ....