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python: refactoring virTypedParameter conversion for NUMA tuning APIs
*getPyVirTypedParameter
*setPyVirTypedParameter
*virDomainSetNumaParameters
*virDomainGetNumaParameters
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Guannan Ren
Eric Blake
parent
612fd1573b
commit
9c8466daac
@ -248,6 +248,19 @@
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<arg name='domain' type='virDomainPtr' info='pointer to domain object'/>
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<arg name='flags' type='int' info='an OR'ed set of virDomainModificationImpact'/>
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</function>
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<function name='virDomainSetNumaParameters' file='python'>
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<info>Change the NUMA tunables</info>
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<return type='int' info='-1 in case of error, 0 in case of success.'/>
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<arg name='domain' type='virDomainPtr' info='pointer to domain object'/>
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<arg name='params' type='virTypedParameterPtr' info='pointer to numa tunable objects'/>
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<arg name='flags' type='int' info='an OR'ed set of virDomainModificationImpact'/>
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</function>
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<function name='virDomainGetNumaParameters' file='python'>
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<info>Get the NUMA parameters</info>
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<return type='str *' info='returns a dictionary of params in case of success, None in case of error'/>
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<arg name='domain' type='virDomainPtr' info='pointer to domain object'/>
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<arg name='flags' type='int' info='an OR'ed set of virDomainModificationImpact'/>
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</function>
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<function name='virConnectListStoragePools' file='python'>
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<info>list the storage pools, stores the pointers to the names in @names</info>
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<arg name='conn' type='virConnectPtr' info='pointer to the hypervisor connection'/>
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@ -16,12 +16,18 @@
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which has over 180 autoconf-style HAVE_* definitions. Shame on them. */
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#undef HAVE_PTHREAD_H
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/* We want to see *_LAST enums. */
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#define VIR_ENUM_SENTINELS
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#include <Python.h>
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#include "libvirt/libvirt.h"
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#include "libvirt/virterror.h"
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#include "typewrappers.h"
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#include "libvirt.h"
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#include "memory.h"
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#include "virtypedparam.h"
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#include "ignore-value.h"
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#include "util.h"
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#ifndef __CYGWIN__
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extern void initlibvirtmod(void);
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@ -62,6 +68,228 @@ static char *py_str(PyObject *obj)
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return PyString_AsString(str);
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}
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/* Helper function to convert a virTypedParameter output array into a
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* Python dictionary for return to the user. Return NULL on failure,
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* after raising a python exception. */
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static PyObject * ATTRIBUTE_NONNULL(1)
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getPyVirTypedParameter(const virTypedParameterPtr params, int nparams)
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{
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PyObject *key, *val, *info;
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int i;
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if ((info = PyDict_New()) == NULL)
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return NULL;
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for (i = 0 ; i < nparams ; i++) {
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switch (params[i].type) {
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case VIR_TYPED_PARAM_INT:
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val = PyInt_FromLong(params[i].value.i);
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break;
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case VIR_TYPED_PARAM_UINT:
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val = PyInt_FromLong(params[i].value.ui);
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break;
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case VIR_TYPED_PARAM_LLONG:
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val = PyLong_FromLongLong(params[i].value.l);
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break;
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case VIR_TYPED_PARAM_ULLONG:
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val = PyLong_FromUnsignedLongLong(params[i].value.ul);
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break;
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case VIR_TYPED_PARAM_DOUBLE:
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val = PyFloat_FromDouble(params[i].value.d);
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break;
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case VIR_TYPED_PARAM_BOOLEAN:
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val = PyBool_FromLong(params[i].value.b);
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break;
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case VIR_TYPED_PARAM_STRING:
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val = libvirt_constcharPtrWrap(params[i].value.s);
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break;
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default:
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/* Possible if a newer server has a bug and sent stuff we
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* don't recognize. */
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PyErr_Format(PyExc_LookupError,
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"Type value \"%d\" not recognized",
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params[i].type);
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val = NULL;
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break;
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}
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key = libvirt_constcharPtrWrap(params[i].field);
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if (!key || !val)
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goto cleanup;
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if (PyDict_SetItem(info, key, val) < 0) {
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Py_DECREF(info);
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goto cleanup;
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}
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Py_DECREF(key);
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Py_DECREF(val);
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}
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return info;
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cleanup:
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Py_XDECREF(key);
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Py_XDECREF(val);
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return NULL;
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}
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/* Allocate a new typed parameter array with the same contents and
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* length as info, and using the array params of length nparams as
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* hints on what types to use when creating the new array. The caller
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* must NOT clear the array before freeing it, as it points into info
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* rather than allocated strings. Return NULL on failure, after
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* raising a python exception. */
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static virTypedParameterPtr ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2)
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setPyVirTypedParameter(PyObject *info,
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const virTypedParameterPtr params, int nparams)
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{
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PyObject *key, *value;
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Py_ssize_t pos = 0;
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virTypedParameterPtr temp = NULL, ret = NULL;
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int size, i;
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if ((size = PyDict_Size(info)) < 0)
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return NULL;
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/* Libvirt APIs use NULL array and 0 size as a special case;
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* setting should have at least one parameter. */
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if (size == 0) {
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PyErr_Format(PyExc_LookupError, "Dictionary must not be empty");
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return NULL;
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}
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if (VIR_ALLOC_N(ret, size) < 0) {
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PyErr_NoMemory();
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return NULL;
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}
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temp = &ret[0];
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while (PyDict_Next(info, &pos, &key, &value)) {
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char *keystr = NULL;
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if ((keystr = PyString_AsString(key)) == NULL)
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goto cleanup;
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for (i = 0; i < nparams; i++) {
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if (STREQ(params[i].field, keystr))
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break;
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}
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if (i == nparams) {
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PyErr_Format(PyExc_LookupError,
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"Attribute name \"%s\" could not be recognized",
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keystr);
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goto cleanup;
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}
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ignore_value(virStrcpyStatic(temp->field, keystr));
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temp->type = params[i].type;
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switch(params[i].type) {
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case VIR_TYPED_PARAM_INT:
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{
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long long_val = PyInt_AsLong(value);
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if ((long_val == -1) && PyErr_Occurred())
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goto cleanup;
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if ((int)long_val == long_val) {
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temp->value.i = long_val;
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} else {
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PyErr_Format(PyExc_ValueError,
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"The value of "
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"attribute \"%s\" is out of int range", keystr);
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goto cleanup;
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}
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}
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break;
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case VIR_TYPED_PARAM_UINT:
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{
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long long_val = PyInt_AsLong(value);
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if ((long_val == -1) && PyErr_Occurred())
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goto cleanup;
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if ((unsigned int)long_val == long_val) {
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temp->value.ui = long_val;
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} else {
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PyErr_Format(PyExc_ValueError,
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"The value of "
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"attribute \"%s\" is out of int range", keystr);
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goto cleanup;
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}
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}
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break;
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case VIR_TYPED_PARAM_LLONG:
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{
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long long llong_val = PyLong_AsLongLong(value);
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if ((llong_val == -1) && PyErr_Occurred())
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goto cleanup;
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temp->value.l = llong_val;
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}
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break;
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case VIR_TYPED_PARAM_ULLONG:
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{
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unsigned long long ullong_val = PyLong_AsUnsignedLongLong(value);
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if ((ullong_val == -1) && PyErr_Occurred())
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goto cleanup;
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temp->value.ul = ullong_val;
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}
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break;
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case VIR_TYPED_PARAM_DOUBLE:
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{
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double double_val = PyFloat_AsDouble(value);
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if ((double_val == -1) && PyErr_Occurred())
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goto cleanup;
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temp->value.d = double_val;
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}
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break;
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case VIR_TYPED_PARAM_BOOLEAN:
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{
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/* Hack - Python's definition of Py_True breaks strict
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* aliasing rules, so can't directly compare
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*/
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if (PyBool_Check(value)) {
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PyObject *hacktrue = PyBool_FromLong(1);
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temp->value.b = hacktrue == value ? 1 : 0;
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Py_DECREF(hacktrue);
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} else {
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PyErr_Format(PyExc_TypeError,
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"The value type of "
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"attribute \"%s\" must be bool", keystr);
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goto cleanup;
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}
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}
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break;
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case VIR_TYPED_PARAM_STRING:
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{
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char *string_val = PyString_AsString(value);
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if (!string_val)
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goto cleanup;
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temp->value.s = string_val;
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break;
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}
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default:
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/* Possible if a newer server has a bug and sent stuff we
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* don't recognize. */
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PyErr_Format(PyExc_LookupError,
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"Type value \"%d\" not recognized",
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params[i].type);
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goto cleanup;
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}
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temp++;
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}
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return ret;
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cleanup:
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VIR_FREE(ret);
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return NULL;
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}
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/************************************************************************
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* *
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* Statistics *
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@ -1006,6 +1234,127 @@ libvirt_virDomainGetMemoryParameters(PyObject *self ATTRIBUTE_UNUSED,
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return(info);
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}
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static PyObject *
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libvirt_virDomainSetNumaParameters(PyObject *self ATTRIBUTE_UNUSED,
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PyObject *args)
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{
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virDomainPtr domain;
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PyObject *pyobj_domain, *info;
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PyObject *ret = NULL;
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int i_retval;
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int nparams = 0, size = 0;
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unsigned int flags;
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virTypedParameterPtr params, new_params;
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if (!PyArg_ParseTuple(args,
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(char *)"OOi:virDomainSetNumaParameters",
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&pyobj_domain, &info, &flags))
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return NULL;
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domain = (virDomainPtr) PyvirDomain_Get(pyobj_domain);
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if ((size = PyDict_Size(info)) < 0)
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return NULL;
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if (size == 0) {
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PyErr_Format(PyExc_LookupError,
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"Need non-empty dictionary to set attributes");
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return NULL;
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}
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LIBVIRT_BEGIN_ALLOW_THREADS;
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i_retval = virDomainGetNumaParameters(domain, NULL, &nparams, flags);
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LIBVIRT_END_ALLOW_THREADS;
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if (i_retval < 0)
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return VIR_PY_INT_FAIL;
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if (nparams == 0) {
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PyErr_Format(PyExc_LookupError,
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"Domain has no settable attributes");
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return NULL;
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}
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if (VIR_ALLOC_N(params, nparams) < 0)
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return PyErr_NoMemory();
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LIBVIRT_BEGIN_ALLOW_THREADS;
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i_retval = virDomainGetNumaParameters(domain, params, &nparams, flags);
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LIBVIRT_END_ALLOW_THREADS;
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if (i_retval < 0) {
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ret = VIR_PY_INT_FAIL;
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goto cleanup;
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}
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new_params = setPyVirTypedParameter(info, params, nparams);
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if (!new_params)
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goto cleanup;
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LIBVIRT_BEGIN_ALLOW_THREADS;
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i_retval = virDomainSetNumaParameters(domain, new_params, size, flags);
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LIBVIRT_END_ALLOW_THREADS;
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if (i_retval < 0) {
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ret = VIR_PY_INT_FAIL;
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goto cleanup;
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}
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ret = VIR_PY_INT_SUCCESS;
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cleanup:
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virTypedParameterArrayClear(params, nparams);
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VIR_FREE(params);
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VIR_FREE(new_params);
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return ret;
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}
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static PyObject *
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libvirt_virDomainGetNumaParameters(PyObject *self ATTRIBUTE_UNUSED,
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PyObject *args)
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{
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virDomainPtr domain;
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PyObject *pyobj_domain;
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PyObject *ret = NULL;
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int i_retval;
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int nparams = 0;
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unsigned int flags;
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virTypedParameterPtr params;
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if (!PyArg_ParseTuple(args, (char *)"Oi:virDomainGetNumaParameters",
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&pyobj_domain, &flags))
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return NULL;
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domain = (virDomainPtr) PyvirDomain_Get(pyobj_domain);
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LIBVIRT_BEGIN_ALLOW_THREADS;
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i_retval = virDomainGetNumaParameters(domain, NULL, &nparams, flags);
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LIBVIRT_END_ALLOW_THREADS;
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if (i_retval < 0)
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return VIR_PY_NONE;
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if (!nparams)
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return PyDict_New();
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if (VIR_ALLOC_N(params, nparams) < 0)
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return PyErr_NoMemory();
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LIBVIRT_BEGIN_ALLOW_THREADS;
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i_retval = virDomainGetNumaParameters(domain, params, &nparams, flags);
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LIBVIRT_END_ALLOW_THREADS;
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if (i_retval < 0) {
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ret = VIR_PY_NONE;
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goto cleanup;
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}
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ret = getPyVirTypedParameter(params, nparams);
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cleanup:
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virTypedParameterArrayClear(params, nparams);
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VIR_FREE(params);
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return ret;
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}
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static PyObject *
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libvirt_virDomainGetVcpus(PyObject *self ATTRIBUTE_UNUSED,
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PyObject *args) {
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@ -5205,6 +5554,8 @@ static PyMethodDef libvirtMethods[] = {
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{(char *) "virDomainGetBlkioParameters", libvirt_virDomainGetBlkioParameters, METH_VARARGS, NULL},
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{(char *) "virDomainSetMemoryParameters", libvirt_virDomainSetMemoryParameters, METH_VARARGS, NULL},
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{(char *) "virDomainGetMemoryParameters", libvirt_virDomainGetMemoryParameters, METH_VARARGS, NULL},
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{(char *) "virDomainSetNumaParameters", libvirt_virDomainSetNumaParameters, METH_VARARGS, NULL},
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{(char *) "virDomainGetNumaParameters", libvirt_virDomainGetNumaParameters, METH_VARARGS, NULL},
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{(char *) "virDomainGetVcpus", libvirt_virDomainGetVcpus, METH_VARARGS, NULL},
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{(char *) "virDomainPinVcpu", libvirt_virDomainPinVcpu, METH_VARARGS, NULL},
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{(char *) "virDomainPinVcpuFlags", libvirt_virDomainPinVcpuFlags, METH_VARARGS, NULL},
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