[libvirt] [PATCH] libxl: implement virDomainGetMaxVcpus

[Jim Fehlig]

The libxl driver already supports getting maximum vcpu count via
libxlDomainGetVcpusFlags, allowing to trivially implement
virDomainGetMaxVcpus.

Signed-off-by: Jim Fehlig <jfehlig at suse.com>
---
 docs/news.html.in        | 2 ++
 src/libxl/libxl_driver.c | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/docs/news.html.in b/docs/news.html.in
index c222075..2365c39 100644
--- a/docs/news.html.in
+++ b/docs/news.html.in
@@ -39,6 +39,8 @@
           _virStorageVolInfo structure. The --physical flag has been
           added to the virsh vol-info command to access the data
           </li>
+          <li>libxl: Implement virDomainGetMaxVcpus API
+          </li>
         </ul>
       </li>
       <li><strong>Improvements</strong>
diff --git a/src/libxl/libxl_driver.c b/src/libxl/libxl_driver.c
index 7e5d9b6..51fe3d8 100644
--- a/src/libxl/libxl_driver.c
+++ b/src/libxl/libxl_driver.c
@@ -2363,6 +2363,13 @@ libxlDomainGetVcpusFlags(virDomainPtr dom, unsigned int flags)
 }
 
 static int
+libxlDomainGetMaxVcpus(virDomainPtr dom)
+{
+    return libxlDomainGetVcpusFlags(dom, (VIR_DOMAIN_AFFECT_LIVE |
+                                          VIR_DOMAIN_VCPU_MAXIMUM));
+}
+
+static int
 libxlDomainPinVcpuFlags(virDomainPtr dom, unsigned int vcpu,
                         unsigned char *cpumap, int maplen,
                         unsigned int flags)
@@ -6446,6 +6453,7 @@ static virHypervisorDriver libxlHypervisorDriver = {
     .domainSetVcpus = libxlDomainSetVcpus, /* 0.9.0 */
     .domainSetVcpusFlags = libxlDomainSetVcpusFlags, /* 0.9.0 */
     .domainGetVcpusFlags = libxlDomainGetVcpusFlags, /* 0.9.0 */
+    .domainGetMaxVcpus = libxlDomainGetMaxVcpus, /* 3.0.0 */
     .domainPinVcpu = libxlDomainPinVcpu, /* 0.9.0 */
     .domainPinVcpuFlags = libxlDomainPinVcpuFlags, /* 1.2.1 */
     .domainGetVcpus = libxlDomainGetVcpus, /* 0.9.0 */
-- 
2.9.2