From: Peter Krempa <pkrempa@redhat.com>
Date: Wed, 20 Mar 2013 10:43:41 +0000 (+0100)
Subject: python: Fix emulatorpin API bindings
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=d395c81121cd997d1971149361905e4e8c917004;p=people%2Fliuw%2Flibxenctrl-split%2Flibvirt.git

python: Fix emulatorpin API bindings

The addition of emulator pinning APIs didn't think of doing the right
job with python APIs for them. The default generator produced unusable
code for this.

This patch switches to proper code as in the case of domain Vcpu pining.
This change can be classified as a python API-breaker but in the state
the code was before I doubt anyone was able to use it successfully.
---

diff --git a/python/generator.py b/python/generator.py
index d269e88a4..986324a79 100755
--- a/python/generator.py
+++ b/python/generator.py
@@ -418,6 +418,8 @@ skip_impl = (
     'virDomainPinVcpu',
     'virDomainPinVcpuFlags',
     'virDomainGetVcpuPinInfo',
+    'virDomainGetEmulatorPinInfo',
+    'virDomainPinEmulator',
     'virSecretGetValue',
     'virSecretSetValue',
     'virSecretGetUUID',
diff --git a/python/libvirt-override-api.xml b/python/libvirt-override-api.xml
index 2bd0e6a57..155ab36ef 100644
--- a/python/libvirt-override-api.xml
+++ b/python/libvirt-override-api.xml
@@ -249,6 +249,20 @@
       <arg name='domain' type='virDomainPtr' info='pointer to domain object, or NULL for Domain0'/>
       <arg name='flags'  type='int' info='an OR&apos;ed set of virDomainModificationImpact'/>
     </function>
+    <function name='virDomainGetEmulatorPinInfo' file='python'>
+      <info>Query the CPU affinity setting of the emulator process of domain</info>
+      <return type='char *' info='the array of cpumap'/>
+      <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='virDomainPinEmulator' file='python'>
+      <info>Dynamically change the real CPUs which can be allocated to the emulator process of a domain.
+            This function requires privileged access to the hypervisor.</info>
+      <return type='int' info='0 in case of success, -1 in case of failure.'/>
+      <arg name='domain' type='virDomainPtr' info='pointer to domain object, or NULL for Domain0'/>
+      <arg name='cpumap' type='unsigned char *' info='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.'/>
+      <arg name='flags' type='int' info='flags to specify'/>
+    </function>
     <function name='virDomainSetSchedulerParameters' file='python'>
       <info>Change the scheduler parameters</info>
       <return type='int' info='-1 in case of error, 0 in case of success.'/>
diff --git a/python/libvirt-override.c b/python/libvirt-override.c
index 9637598be..f6573e1af 100644
--- a/python/libvirt-override.c
+++ b/python/libvirt-override.c
@@ -1664,6 +1664,122 @@ cleanup:
     return VIR_PY_NONE;
 }
 
+
+static PyObject *
+libvirt_virDomainPinEmulator(PyObject *self ATTRIBUTE_UNUSED,
+                             PyObject *args)
+{
+    virDomainPtr domain;
+    PyObject *pyobj_domain, *pycpumap;
+    unsigned char *cpumap = NULL;
+    int cpumaplen, i, tuple_size, cpunum;
+    int i_retval;
+    unsigned int flags;
+
+    if (!PyArg_ParseTuple(args, (char *)"OOi:virDomainPinVcpu",
+                          &pyobj_domain, &pycpumap, &flags))
+        return NULL;
+
+    domain = (virDomainPtr) PyvirDomain_Get(pyobj_domain);
+
+    if ((cpunum = getPyNodeCPUCount(virDomainGetConnect(domain))) < 0)
+        return VIR_PY_INT_FAIL;
+
+    cpumaplen = VIR_CPU_MAPLEN(cpunum);
+
+    if (!PyTuple_Check(pycpumap)) {
+       PyErr_SetString(PyExc_TypeError, "Unexpected type, tuple is required");
+       return NULL;
+    }
+
+    if ((tuple_size = PyTuple_Size(pycpumap)) == -1)
+        return NULL;
+
+    if (VIR_ALLOC_N(cpumap, cpumaplen) < 0)
+        return PyErr_NoMemory();
+
+    for (i = 0; i < tuple_size; i++) {
+        PyObject *flag = PyTuple_GetItem(pycpumap, i);
+        bool b;
+
+        if (!flag || libvirt_boolUnwrap(flag, &b) < 0) {
+            VIR_FREE(cpumap);
+            return VIR_PY_INT_FAIL;
+        }
+
+        if (b)
+            VIR_USE_CPU(cpumap, i);
+        else
+            VIR_UNUSE_CPU(cpumap, i);
+    }
+
+    for (; i < cpunum; i++)
+        VIR_UNUSE_CPU(cpumap, i);
+
+    LIBVIRT_BEGIN_ALLOW_THREADS;
+    i_retval = virDomainPinEmulator(domain, cpumap, cpumaplen, flags);
+    LIBVIRT_END_ALLOW_THREADS;
+
+    VIR_FREE(cpumap);
+
+    if (i_retval < 0)
+        return VIR_PY_INT_FAIL;
+
+    return VIR_PY_INT_SUCCESS;
+}
+
+
+static PyObject *
+libvirt_virDomainGetEmulatorPinInfo(PyObject *self ATTRIBUTE_UNUSED,
+                                    PyObject *args)
+{
+    virDomainPtr domain;
+    PyObject *pyobj_domain;
+    PyObject *pycpumap;
+    unsigned char *cpumap;
+    size_t cpumaplen;
+    size_t pcpu;
+    unsigned int flags;
+    int ret;
+    int cpunum;
+
+    if (!PyArg_ParseTuple(args, (char *)"Oi:virDomainEmulatorPinInfo",
+                          &pyobj_domain, &flags))
+        return NULL;
+
+    domain = (virDomainPtr) PyvirDomain_Get(pyobj_domain);
+
+    if ((cpunum = getPyNodeCPUCount(virDomainGetConnect(domain))) < 0)
+        return VIR_PY_NONE;
+
+    cpumaplen = VIR_CPU_MAPLEN(cpunum);
+
+    if (VIR_ALLOC_N(cpumap, cpumaplen) < 0)
+        return PyErr_NoMemory();
+
+    LIBVIRT_BEGIN_ALLOW_THREADS;
+    ret = virDomainGetEmulatorPinInfo(domain, cpumap, cpumaplen, flags);
+    LIBVIRT_END_ALLOW_THREADS;
+    if (ret < 0) {
+        VIR_FREE(cpumap);
+        return VIR_PY_NONE;
+    }
+
+    if (!(pycpumap = PyTuple_New(cpunum))) {
+        VIR_FREE(cpumap);
+        return NULL;
+    }
+
+    for (pcpu = 0; pcpu < cpunum; pcpu++)
+        PyTuple_SET_ITEM(pycpumap, pcpu,
+                         PyBool_FromLong(VIR_CPU_USABLE(cpumap, cpumaplen,
+                                                        0, pcpu)));
+
+    VIR_FREE(cpumap);
+    return pycpumap;
+}
+
+
 /************************************************************************
  *									*
  *		Global error handler at the Python level		*
@@ -6705,6 +6821,8 @@ static PyMethodDef libvirtMethods[] = {
     {(char *) "virDomainPinVcpu", libvirt_virDomainPinVcpu, METH_VARARGS, NULL},
     {(char *) "virDomainPinVcpuFlags", libvirt_virDomainPinVcpuFlags, METH_VARARGS, NULL},
     {(char *) "virDomainGetVcpuPinInfo", libvirt_virDomainGetVcpuPinInfo, METH_VARARGS, NULL},
+    {(char *) "virDomainGetEmulatorPinInfo", libvirt_virDomainGetEmulatorPinInfo, METH_VARARGS, NULL},
+    {(char *) "virDomainPinEmulator", libvirt_virDomainPinEmulator, METH_VARARGS, NULL},
     {(char *) "virConnectListStoragePools", libvirt_virConnectListStoragePools, METH_VARARGS, NULL},
     {(char *) "virConnectListDefinedStoragePools", libvirt_virConnectListDefinedStoragePools, METH_VARARGS, NULL},
     {(char *) "virConnectListAllStoragePools", libvirt_virConnectListAllStoragePools, METH_VARARGS, NULL},