# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1181055119 -3600
# Node ID c5cf3942b5da002b02280bae4dcf92629593fcbb
# Parent 0feaf2fc75d3e05f65b840f650166b54d7d5eb8e
[ACM] Python-to-C Interface for new ACM hypercalls.
Provide an interface for using recently-added Xen functionality from
python.
Signed-off-by: Stefan Berger <stefanb@xxxxxxxxxx>
---
tools/python/xen/lowlevel/acm/acm.c | 114 +++++++++++++++++++++++++++++++++++-
1 files changed, 111 insertions(+), 3 deletions(-)
diff -r 0feaf2fc75d3 -r c5cf3942b5da tools/python/xen/lowlevel/acm/acm.c
--- a/tools/python/xen/lowlevel/acm/acm.c Tue Jun 05 10:28:59 2007 +0100
+++ b/tools/python/xen/lowlevel/acm/acm.c Tue Jun 05 15:51:59 2007 +0100
@@ -1,10 +1,11 @@
/****************************************************************
* acm.c
*
- * Copyright (C) 2006 IBM Corporation
+ * Copyright (C) 2006,2007 IBM Corporation
*
* Authors:
* Reiner Sailer <sailer@xxxxxxxxxxxxxx>
+ * Stefan Berger <stefanb@xxxxxxxxxx>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
@@ -197,13 +198,120 @@ static PyObject *getdecision(PyObject *
return Py_BuildValue("s", decision);
}
+/* error messages for exceptions */
+const char bad_arg[] = "Bad function argument.";
+const char ctrlif_op[] = "Could not open control interface.";
+const char hv_op_err[] = "Error from hypervisor operation.";
+
+
+static PyObject *chgpolicy(PyObject *self, PyObject *args)
+{
+ struct acm_change_policy chgpolicy;
+ int xc_handle, rc;
+ char *bin_pol = NULL, *del_arr = NULL, *chg_arr = NULL;
+ int bin_pol_len = 0, del_arr_len = 0, chg_arr_len = 0;
+ uint errarray_mbrs = 20 * 2;
+ uint32_t error_array[errarray_mbrs];
+ PyObject *result;
+ uint len;
+
+ memset(&chgpolicy, 0x0, sizeof(chgpolicy));
+
+ if (!PyArg_ParseTuple(args, "s#s#s#" ,&bin_pol, &bin_pol_len,
+ &del_arr, &del_arr_len,
+ &chg_arr, &chg_arr_len)) {
+ PyErr_SetString(PyExc_TypeError, bad_arg);
+ return NULL;
+ }
+
+ chgpolicy.policy_pushcache_size = bin_pol_len;
+ chgpolicy.delarray_size = del_arr_len;
+ chgpolicy.chgarray_size = chg_arr_len;
+ chgpolicy.errarray_size = sizeof(error_array);
+
+ set_xen_guest_handle(chgpolicy.policy_pushcache, bin_pol);
+ set_xen_guest_handle(chgpolicy.del_array, del_arr);
+ set_xen_guest_handle(chgpolicy.chg_array, chg_arr);
+ set_xen_guest_handle(chgpolicy.err_array, error_array);
+
+ if ((xc_handle = xc_interface_open()) <= 0) {
+ PyErr_SetString(PyExc_IOError, ctrlif_op);
+ return NULL;
+ }
+
+ rc = xc_acm_op(xc_handle, ACMOP_chgpolicy, &chgpolicy, sizeof(chgpolicy));
+
+ xc_interface_close(xc_handle);
+
+ /* only pass the filled error codes */
+ for (len = 0; (len + 1) < errarray_mbrs; len += 2) {
+ if (error_array[len] == 0) {
+ len *= sizeof(error_array[0]);
+ break;
+ }
+ }
+
+ result = Py_BuildValue("is#", rc, error_array, len);
+ return result;
+}
+
+
+static PyObject *relabel_domains(PyObject *self, PyObject *args)
+{
+ struct acm_relabel_doms reldoms;
+ int xc_handle, rc;
+ char *relabel_rules = NULL;
+ int rel_rules_len = 0;
+ uint errarray_mbrs = 20 * 2;
+ uint32_t error_array[errarray_mbrs];
+ PyObject *result;
+ uint len;
+
+ memset(&reldoms, 0x0, sizeof(reldoms));
+
+ if (!PyArg_ParseTuple(args, "s#" ,&relabel_rules, &rel_rules_len)) {
+ PyErr_SetString(PyExc_TypeError, bad_arg);
+ return NULL;
+ }
+
+ reldoms.relabel_map_size = rel_rules_len;
+ reldoms.errarray_size = sizeof(error_array);
+
+ set_xen_guest_handle(reldoms.relabel_map, relabel_rules);
+ set_xen_guest_handle(reldoms.err_array, error_array);
+
+ if ((xc_handle = xc_interface_open()) <= 0) {
+ PyErr_SetString(PyExc_IOError, ctrlif_op);
+ return NULL;
+ }
+
+ rc = xc_acm_op(xc_handle, ACMOP_relabeldoms, &reldoms, sizeof(reldoms));
+
+ xc_interface_close(xc_handle);
+
+
+ /* only pass the filled error codes */
+ for (len = 0; (len + 1) < errarray_mbrs; len += 2) {
+ if (error_array[len] == 0) {
+ len *= sizeof(error_array[0]);
+ break;
+ }
+ }
+
+ result = Py_BuildValue("is#", rc, error_array, len);
+ return result;
+}
+
+
/*=================General Python Extension Declarations=================*/
/* methods */
static PyMethodDef acmMethods[] = {
- {"policy", policy, METH_VARARGS, "Retrieve Active ACM Policy Reference
Name"},
- {"getssid", getssid, METH_VARARGS, "Retrieve label information and ssidref
for a domain"},
+ {"policy", policy, METH_VARARGS, "Retrieve Active ACM Policy
Reference Name"},
+ {"getssid", getssid, METH_VARARGS, "Retrieve label information and
ssidref for a domain"},
{"getdecision", getdecision, METH_VARARGS, "Retrieve ACM access control
decision"},
+ {"chgpolicy", chgpolicy, METH_VARARGS, "Change the policy in one
step"},
+ {"relabel_domains", relabel_domains, METH_VARARGS, "Relabel domains"},
/* end of list (extend list above this line) */
{NULL, NULL, 0, NULL}
};
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