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/*
* virnwfilterbindingobj.c: network filter binding object processing
*
* Copyright (C) 2018 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <unistd.h>
#include "viralloc.h"
#include "virerror.h"
#include "virnwfilterbindingobj.h"
#define VIR_FROM_THIS VIR_FROM_NWFILTER
struct _virNWFilterBindingObj {
virObjectLockable parent;
bool removing;
virNWFilterBindingDef *def;
};
static virClass *virNWFilterBindingObjClass;
static void virNWFilterBindingObjDispose(void *obj);
static int
virNWFilterBindingObjOnceInit(void)
{
if (!VIR_CLASS_NEW(virNWFilterBindingObj, virClassForObjectLockable()))
return -1;
return 0;
}
VIR_ONCE_GLOBAL_INIT(virNWFilterBindingObj);
virNWFilterBindingObj *
virNWFilterBindingObjNew(void)
{
virNWFilterBindingObj *ret;
if (virNWFilterBindingObjInitialize() < 0)
return NULL;
if (!(ret = virObjectLockableNew(virNWFilterBindingObjClass)))
return NULL;
virObjectLock(ret);
return ret;
}
static void
virNWFilterBindingObjDispose(void *obj)
{
virNWFilterBindingObj *bobj = obj;
virNWFilterBindingDefFree(bobj->def);
}
virNWFilterBindingDef *
virNWFilterBindingObjGetDef(virNWFilterBindingObj *obj)
{
return obj->def;
}
void
virNWFilterBindingObjSetDef(virNWFilterBindingObj *obj,
virNWFilterBindingDef *def)
{
virNWFilterBindingDefFree(obj->def);
obj->def = def;
}
virNWFilterBindingDef *
virNWFilterBindingObjStealDef(virNWFilterBindingObj *obj)
{
return g_steal_pointer(&obj->def);
}
bool
virNWFilterBindingObjGetRemoving(virNWFilterBindingObj *obj)
{
return obj->removing;
}
void
virNWFilterBindingObjSetRemoving(virNWFilterBindingObj *obj,
bool removing)
{
obj->removing = removing;
}
/**
* virNWFilterBindingObjEndAPI:
* @obj: binding object
*
* Finish working with a binding object in an API. This function
* clears whatever was left of a domain that was gathered using
* virNWFilterBindingObjListFindByPortDev(). Currently that means
* only unlocking and decrementing the reference counter of that
* object. And in order to make sure the caller does not access
* the object, the pointer is cleared.
*/
void
virNWFilterBindingObjEndAPI(virNWFilterBindingObj **obj)
{
if (!*obj)
return;
virObjectUnlock(*obj);
g_clear_pointer(obj, virObjectUnref);
}
char *
virNWFilterBindingObjConfigFile(const char *dir,
const char *name)
{
return g_strdup_printf("%s/%s.xml", dir, name);
}
int
virNWFilterBindingObjSave(const virNWFilterBindingObj *obj,
const char *statusDir)
{
g_autofree char *filename = NULL;
g_autofree char *xml = NULL;
int ret = -1;
if (!(filename = virNWFilterBindingObjConfigFile(statusDir,
obj->def->portdevname)))
return -1;
if (!(xml = virNWFilterBindingObjFormat(obj)))
return -1;
if (g_mkdir_with_parents(statusDir, 0777) < 0) {
virReportSystemError(errno,
_("cannot create config directory '%1$s'"),
statusDir);
return -1;
}
ret = virXMLSaveFile(filename,
obj->def->portdevname, "nwfilter-binding-create",
xml);
return ret;
}
int
virNWFilterBindingObjDelete(const virNWFilterBindingObj *obj,
const char *statusDir)
{
g_autofree char *filename = NULL;
if (!(filename = virNWFilterBindingObjConfigFile(statusDir,
obj->def->portdevname)))
return -1;
if (unlink(filename) < 0 &&
errno != ENOENT) {
virReportSystemError(errno,
_("Unable to remove status '%1$s' for nwfilter binding %2$s'"),
filename, obj->def->portdevname);
return -1;
}
return 0;
}
virNWFilterBindingObj *
virNWFilterBindingObjParse(const char *filename)
{
g_autoptr(virNWFilterBindingObj) ret = NULL;
g_autoptr(xmlDoc) xml = NULL;
g_autoptr(xmlXPathContext) ctxt = NULL;
xmlNodePtr node;
if (!(xml = virXMLParse(filename, NULL, _("(nwfilterbinding_status)"),
"filterbindingstatus", &ctxt, NULL, false)))
return NULL;
if (!(ret = virNWFilterBindingObjNew()))
return NULL;
if (!(node = virXPathNode("./filterbinding", ctxt))) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("filter binding status missing content"));
return NULL;
}
ctxt->node = node;
if (!(ret->def = virNWFilterBindingDefParseXML(ctxt)))
return NULL;
return g_steal_pointer(&ret);
}
char *
virNWFilterBindingObjFormat(const virNWFilterBindingObj *obj)
{
g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
virBufferAddLit(&buf, "<filterbindingstatus>\n");
virBufferAdjustIndent(&buf, 2);
if (virNWFilterBindingDefFormatBuf(&buf, obj->def) < 0)
return NULL;
virBufferAdjustIndent(&buf, -2);
virBufferAddLit(&buf, "</filterbindingstatus>\n");
return virBufferContentAndReset(&buf);
}
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