python: add python binding for Perf API

This patch adds the python binding for virDomainSetPerfEvents and
virDomainSetPerfEvents API.

Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>

generator.py

@@ -488,6 +488,8 @@ skip_impl = (
     'virNodeAllocPages',
     'virDomainGetFSInfo',
     'virDomainInterfaceAddresses',
+    'virDomainGetPerfEvents',
+    'virDomainSetPerfEvents',
 )
 
 lxc_skip_impl = (

libvirt-override-api.xml

@@ -344,6 +344,19 @@
       <arg name='domain' type='virDomainPtr' info='pointer to domain object'/>
       <arg name='flags' type='int' info='an OR&apos;ed set of virDomainModificationImpact'/>
     </function>
+    <function name='virDomainGetPerfEvents' file='python'>
+      <info>Get all perf events setting.</info>
+      <return type='char *' info='returns a dictionary of params in case of success, None in case of error'/>
+      <arg name='domain' type='virDomainPtr' info='pointer to domain object'/>
+      <arg name='flags' type='int' info='an OR&apos;ed set of virDomainModificationImpact'/>
+    </function>
+    <function name='virDomainSetPerfEvents' file='python'>
+      <info>Enable or disable the particular list of perf events</info>
+      <return type='int' info='-1 in case of error, 0 in case of success.'/>
+      <arg name='domain' type='virDomainPtr' info='pointer to domain object'/>
+      <arg name='params' type='virTypedParameterPtr' info='pointer to perf events parameter object'/>
+      <arg name='flags' type='int' info='an OR&apos;ed set of virDomainModificationImpact'/>
+    </function>
     <function name='virDomainSetInterfaceParameters' file='python'>
       <info>Change the bandwidth tunables for a interface device</info>
       <arg name='dom' type='virDomainPtr' info='pointer to the domain'/>

libvirt-override.c

@@ -8607,6 +8607,102 @@ libvirt_virDomainGetFSInfo(PyObject *self ATTRIBUTE_UNUSED,
 
 #endif /* LIBVIR_CHECK_VERSION(1, 2, 11) */
 
+#if LIBVIR_CHECK_VERSION(1, 3, 3)
+static PyObject *
+libvirt_virDomainGetPerfEvents(PyObject *self ATTRIBUTE_UNUSED,
+                               PyObject *args)
+{
+    PyObject *pyobj_domain;
+    virDomainPtr domain;
+    virTypedParameterPtr params = NULL;
+    int nparams = 0;
+    PyObject *dict = NULL;
+    unsigned int flags;
+    int rc;
+
+    if (!PyArg_ParseTuple(args, (char *) "OI:virDomainGetPerfEvents",
+                          &pyobj_domain, &flags))
+        return NULL;
+    domain = (virDomainPtr) PyvirDomain_Get(pyobj_domain);
+
+    LIBVIRT_BEGIN_ALLOW_THREADS;
+    rc = virDomainGetPerfEvents(domain, &params, &nparams, flags);
+    LIBVIRT_END_ALLOW_THREADS;
+    if (rc < 0)
+        return VIR_PY_NONE;
+
+    if (!(dict = getPyVirTypedParameter(params, nparams)))
+        goto cleanup;
+
+ cleanup:
+    virTypedParamsFree(params, nparams);
+    return dict;
+}
+
+static PyObject *
+libvirt_virDomainSetPerfEvents(PyObject *self ATTRIBUTE_UNUSED,
+                               PyObject *args)
+{
+    virDomainPtr domain;
+    PyObject *pyobj_domain, *info;
+    PyObject *ret = NULL;
+    int i_retval;
+    int nparams = 0;
+    Py_ssize_t size = 0;
+    unsigned int flags;
+    virTypedParameterPtr params = NULL, new_params = NULL;
+
+    if (!PyArg_ParseTuple(args,
+                          (char *)"OOI:virDomainSetPerfEvents",
+                          &pyobj_domain, &info, &flags))
+        return NULL;
+    domain = (virDomainPtr) PyvirDomain_Get(pyobj_domain);
+
+    if ((size = PyDict_Size(info)) < 0)
+        return NULL;
+
+    if (size == 0) {
+        PyErr_Format(PyExc_LookupError,
+                     "Need non-empty dictionary to set attributes");
+        return NULL;
+    }
+
+    LIBVIRT_BEGIN_ALLOW_THREADS;
+    i_retval = virDomainGetPerfEvents(domain, &params, &nparams, flags);
+    LIBVIRT_END_ALLOW_THREADS;
+
+    if (i_retval < 0)
+        return VIR_PY_INT_FAIL;
+
+    if (nparams == 0) {
+        PyErr_Format(PyExc_LookupError,
+                     "Domain has no settable attributes");
+        return NULL;
+    }
+
+    new_params = setPyVirTypedParameter(info, params, nparams);
+    if (!new_params)
+        goto cleanup;
+
+    LIBVIRT_BEGIN_ALLOW_THREADS;
+    i_retval = virDomainSetPerfEvents(domain, new_params, size, flags);
+    LIBVIRT_END_ALLOW_THREADS;
+
+    if (i_retval < 0) {
+        ret = VIR_PY_INT_FAIL;
+        goto cleanup;
+    }
+
+    ret = VIR_PY_INT_SUCCESS;
+
+ cleanup:
+    virTypedParamsFree(params, nparams);
+    virTypedParamsFree(new_params, size);
+    return ret;
+}
+#endif /* LIBVIR_CHECK_VERSION(1, 3, 3) */
+
+
 /************************************************************************
  *									*
  *			The registration stuff				*
@@ -8810,6 +8906,10 @@ static PyMethodDef libvirtMethods[] = {
 #if LIBVIR_CHECK_VERSION(1, 2, 14)
     {(char *) "virDomainInterfaceAddresses", libvirt_virDomainInterfaceAddresses, METH_VARARGS, NULL},
 #endif /* LIBVIR_CHECK_VERSION(1, 2, 14) */
+#if LIBVIR_CHECK_VERSION(1, 3, 3)
+    {(char *) "virDomainGetPerfEvents", libvirt_virDomainGetPerfEvents, METH_VARARGS, NULL},
+    {(char *) "virDomainSetPerfEvents", libvirt_virDomainSetPerfEvents, METH_VARARGS, NULL},
+#endif /* LIBVIR_CHECK_VERSION(1, 3, 3) */
     {NULL, NULL, 0, NULL}
 };