static int
nwfilterListNWFilters(virConnectPtr conn,
char **const names,
int nnames) {
virNWFilterDriverStatePtr driver = conn->nwfilterPrivateData;
int got = 0, i;
nwfilterDriverLock(driver);
for (i = 0 ; i < driver->nwfilters.count && got < nnames ; i++) {
virNWFilterObjLock(driver->nwfilters.objs[i]);
if (!(names[got] = strdup(driver->nwfilters.objs[i]->def->name))) {
virNWFilterObjUnlock(driver->nwfilters.objs[i]);
virReportOOMError();
goto cleanup;
}
got++;
virNWFilterObjUnlock(driver->nwfilters.objs[i]);
}
nwfilterDriverUnlock(driver);
return got;
cleanup:
nwfilterDriverUnlock(driver);
for (i = 0 ; i < got ; i++)
VIR_FREE(names[i]);
memset(names, 0, nnames * sizeof(*names));
return -1;
}
int
virNWFilterObjListGetNames(virNWFilterObjListPtr nwfilters,
virConnectPtr conn,
virNWFilterObjListFilter filter,
char **const names,
int maxnames)
{
int nnames = 0;
size_t i;
virNWFilterDefPtr def;
for (i = 0; i < nwfilters->count && nnames < maxnames; i++) {
virNWFilterObjPtr obj = nwfilters->objs[i];
virNWFilterObjLock(obj);
def = obj->def;
if (!filter || filter(conn, def)) {
if (VIR_STRDUP(names[nnames], def->name) < 0) {
virNWFilterObjUnlock(obj);
goto failure;
}
nnames++;
}
virNWFilterObjUnlock(obj);
}
return nnames;
failure:
while (--nnames >= 0)
VIR_FREE(names[nnames]);
return -1;
}
int
virNWFilterObjListExport(virConnectPtr conn,
virNWFilterObjListPtr nwfilters,
virNWFilterPtr **filters,
virNWFilterObjListFilter filter)
{
virNWFilterPtr *tmp_filters = NULL;
int nfilters = 0;
virNWFilterPtr nwfilter = NULL;
virNWFilterObjPtr obj = NULL;
virNWFilterDefPtr def;
size_t i;
int ret = -1;
if (!filters) {
ret = nwfilters->count;
goto cleanup;
}
if (VIR_ALLOC_N(tmp_filters, nwfilters->count + 1) < 0)
goto cleanup;
for (i = 0; i < nwfilters->count; i++) {
obj = nwfilters->objs[i];
virNWFilterObjLock(obj);
def = obj->def;
if (!filter || filter(conn, def)) {
if (!(nwfilter = virGetNWFilter(conn, def->name, def->uuid))) {
virNWFilterObjUnlock(obj);
goto cleanup;
}
tmp_filters[nfilters++] = nwfilter;
}
virNWFilterObjUnlock(obj);
}
*filters = tmp_filters;
tmp_filters = NULL;
ret = nfilters;
cleanup:
if (tmp_filters) {
for (i = 0; i < nfilters; i ++)
virObjectUnref(tmp_filters[i]);
}
VIR_FREE(tmp_filters);
return ret;
}
static char *
nwfilterGetXMLDesc(virNWFilterPtr obj,
int flags) {
virNWFilterDriverStatePtr driver = obj->conn->nwfilterPrivateData;
virNWFilterObjPtr nwfilter;
char *ret = NULL;
virCheckFlags(0, NULL);
nwfilterDriverLock(driver);
nwfilter = virNWFilterObjFindByUUID(&driver->nwfilters, obj->uuid);
nwfilterDriverUnlock(driver);
if (!nwfilter) {
virNWFilterReportError(VIR_ERR_NO_NWFILTER,
"%s", _("no nwfilter with matching uuid"));
goto cleanup;
}
ret = virNWFilterDefFormat(nwfilter->def);
cleanup:
if (nwfilter)
virNWFilterObjUnlock(nwfilter);
return ret;
}
int
virNWFilterObjListLoadAllConfigs(virNWFilterObjListPtr nwfilters,
const char *configDir)
{
DIR *dir;
struct dirent *entry;
int ret = -1;
int rc;
if ((rc = virDirOpenIfExists(&dir, configDir)) <= 0)
return rc;
while ((ret = virDirRead(dir, &entry, configDir)) > 0) {
virNWFilterObjPtr obj;
if (!virFileStripSuffix(entry->d_name, ".xml"))
continue;
obj = virNWFilterObjListLoadConfig(nwfilters, configDir, entry->d_name);
if (obj)
virNWFilterObjUnlock(obj);
}
VIR_DIR_CLOSE(dir);
return ret;
}
void
virNWFilterObjListRemove(virNWFilterObjListPtr nwfilters,
virNWFilterObjPtr obj)
{
size_t i;
virNWFilterObjUnlock(obj);
for (i = 0; i < nwfilters->count; i++) {
virNWFilterObjLock(nwfilters->objs[i]);
if (nwfilters->objs[i] == obj) {
virNWFilterObjUnlock(nwfilters->objs[i]);
virNWFilterObjFree(nwfilters->objs[i]);
VIR_DELETE_ELEMENT(nwfilters->objs, i, nwfilters->count);
break;
}
virNWFilterObjUnlock(nwfilters->objs[i]);
}
}
int
virNWFilterObjListNumOfNWFilters(virNWFilterObjListPtr nwfilters,
virConnectPtr conn,
virNWFilterObjListFilter filter)
{
size_t i;
int nfilters = 0;
for (i = 0; i < nwfilters->count; i++) {
virNWFilterObjPtr obj = nwfilters->objs[i];
virNWFilterObjLock(obj);
if (!filter || filter(conn, obj->def))
nfilters++;
virNWFilterObjUnlock(obj);
}
return nfilters;
}
static int
nwfilterUndefine(virNWFilterPtr obj) {
virNWFilterDriverStatePtr driver = obj->conn->nwfilterPrivateData;
virNWFilterObjPtr nwfilter;
int ret = -1;
nwfilterDriverLock(driver);
virNWFilterCallbackDriversLock();
virNWFilterLockFilterUpdates();
nwfilter = virNWFilterObjFindByUUID(&driver->nwfilters, obj->uuid);
if (!nwfilter) {
virNWFilterReportError(VIR_ERR_NO_NWFILTER,
"%s", _("no nwfilter with matching uuid"));
goto cleanup;
}
if (virNWFilterTestUnassignDef(obj->conn, nwfilter)) {
virNWFilterReportError(VIR_ERR_OPERATION_INVALID,
"%s",
_("nwfilter is in use"));
goto cleanup;
}
if (virNWFilterObjDeleteDef(nwfilter) < 0)
goto cleanup;
VIR_FREE(nwfilter->configFile);
virNWFilterObjRemove(&driver->nwfilters, nwfilter);
nwfilter = NULL;
ret = 0;
cleanup:
if (nwfilter)
virNWFilterObjUnlock(nwfilter);
virNWFilterUnlockFilterUpdates();
virNWFilterCallbackDriversUnlock();
nwfilterDriverUnlock(driver);
return ret;
}
virNWFilterObjPtr
virNWFilterObjListFindByUUID(virNWFilterObjListPtr nwfilters,
const unsigned char *uuid)
{
size_t i;
virNWFilterObjPtr obj;
virNWFilterDefPtr def;
for (i = 0; i < nwfilters->count; i++) {
obj = nwfilters->objs[i];
virNWFilterObjLock(obj);
def = obj->def;
if (!memcmp(def->uuid, uuid, VIR_UUID_BUFLEN))
return obj;
virNWFilterObjUnlock(obj);
}
return NULL;
}
virNWFilterObjPtr
virNWFilterObjListFindByName(virNWFilterObjListPtr nwfilters,
const char *name)
{
size_t i;
virNWFilterObjPtr obj;
virNWFilterDefPtr def;
for (i = 0; i < nwfilters->count; i++) {
obj = nwfilters->objs[i];
virNWFilterObjLock(obj);
def = obj->def;
if (STREQ_NULLABLE(def->name, name))
return obj;
virNWFilterObjUnlock(obj);
}
return NULL;
}
virNWFilterObjPtr
virNWFilterObjListFindInstantiateFilter(virNWFilterObjListPtr nwfilters,
const char *filtername)
{
virNWFilterObjPtr obj;
if (!(obj = virNWFilterObjListFindByName(nwfilters, filtername))) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("referenced filter '%s' is missing"), filtername);
return NULL;
}
if (virNWFilterObjWantRemoved(obj)) {
virReportError(VIR_ERR_NO_NWFILTER,
_("Filter '%s' is in use."), filtername);
virNWFilterObjUnlock(obj);
return NULL;
}
return obj;
}
static virNWFilterPtr
nwfilterLookupByName(virConnectPtr conn,
const char *name) {
virNWFilterDriverStatePtr driver = conn->nwfilterPrivateData;
virNWFilterObjPtr nwfilter;
virNWFilterPtr ret = NULL;
nwfilterDriverLock(driver);
nwfilter = virNWFilterObjFindByName(&driver->nwfilters, name);
nwfilterDriverUnlock(driver);
if (!nwfilter) {
virNWFilterReportError(VIR_ERR_NO_NWFILTER,
_("no nwfilter with matching name '%s'"), name);
goto cleanup;
}
ret = virGetNWFilter(conn, nwfilter->def->name, nwfilter->def->uuid);
cleanup:
if (nwfilter)
virNWFilterObjUnlock(nwfilter);
return ret;
}
static virNWFilterPtr
nwfilterDefine(virConnectPtr conn,
const char *xml)
{
virNWFilterDriverStatePtr driver = conn->nwfilterPrivateData;
virNWFilterDefPtr def;
virNWFilterObjPtr nwfilter = NULL;
virNWFilterPtr ret = NULL;
nwfilterDriverLock(driver);
virNWFilterCallbackDriversLock();
if (!(def = virNWFilterDefParseString(conn, xml)))
goto cleanup;
if (!(nwfilter = virNWFilterObjAssignDef(conn, &driver->nwfilters, def)))
goto cleanup;
if (virNWFilterObjSaveDef(driver, nwfilter, def) < 0) {
virNWFilterObjRemove(&driver->nwfilters, nwfilter);
def = NULL;
goto cleanup;
}
def = NULL;
ret = virGetNWFilter(conn, nwfilter->def->name, nwfilter->def->uuid);
cleanup:
virNWFilterDefFree(def);
if (nwfilter)
virNWFilterObjUnlock(nwfilter);
virNWFilterCallbackDriversUnlock();
nwfilterDriverUnlock(driver);
return ret;
}
static int
_virNWFilterObjListDefLoopDetect(virNWFilterObjListPtr nwfilters,
virNWFilterDefPtr def,
const char *filtername)
{
int rc = 0;
size_t i;
virNWFilterEntryPtr entry;
virNWFilterObjPtr obj;
if (!def)
return 0;
for (i = 0; i < def->nentries; i++) {
entry = def->filterEntries[i];
if (entry->include) {
if (STREQ(filtername, entry->include->filterref)) {
rc = -1;
break;
}
obj = virNWFilterObjListFindByName(nwfilters,
entry->include->filterref);
if (obj) {
rc = _virNWFilterObjListDefLoopDetect(nwfilters, obj->def,
filtername);
virNWFilterObjUnlock(obj);
if (rc < 0)
break;
}
}
}
return rc;
}
/**
* _virNWFilterInstantiateRec:
* @conn: pointer to virConnect object
* @techdriver: The driver to use for instantiation
* @filter: The filter to instantiate
* @ifname: The name of the interface to apply the rules to
* @vars: A map holding variable names and values used for instantiating
* the filter and its subfilters.
* @nEntries: number of virNWFilterInst objects collected
* @insts: pointer to array for virNWFilterIns object pointers
* @useNewFilter: instruct whether to use a newDef pointer rather than a
* def ptr which is useful during a filter update
* @foundNewFilter: pointer to int indivating whether a newDef pointer was
* ever used; variable expected to be initialized to 0 by caller
*
* Returns 0 on success, a value otherwise.
*
* Recursively instantiate a filter by instantiating the given filter along
* with all its subfilters in a depth-first traversal of the tree of
* referenced filters. The name of the interface to which the rules belong
* must be provided. Apply the values of variables as needed. Terminate with
* error when a referenced filter is missing or a variable could not be
* resolved -- among other reasons.
*/
static int
_virNWFilterInstantiateRec(virConnectPtr conn,
virNWFilterTechDriverPtr techdriver,
enum virDomainNetType nettype,
virNWFilterDefPtr filter,
const char *ifname,
virNWFilterHashTablePtr vars,
int *nEntries,
virNWFilterRuleInstPtr **insts,
enum instCase useNewFilter, bool *foundNewFilter,
virNWFilterDriverStatePtr driver)
{
virNWFilterObjPtr obj;
int rc = 0;
int i;
virNWFilterRuleInstPtr inst;
virNWFilterDefPtr next_filter;
for (i = 0; i < filter->nentries; i++) {
virNWFilterRuleDefPtr rule = filter->filterEntries[i]->rule;
virNWFilterIncludeDefPtr inc = filter->filterEntries[i]->include;
if (rule) {
inst = virNWFilterRuleInstantiate(conn,
techdriver,
nettype,
filter,
rule,
ifname,
vars);
if (!inst) {
rc = 1;
break;
}
if (VIR_REALLOC_N(*insts, (*nEntries)+1) < 0) {
virReportOOMError();
rc = 1;
break;
}
(*insts)[(*nEntries)++] = inst;
} else if (inc) {
VIR_DEBUG("Instantiating filter %s", inc->filterref);
obj = virNWFilterObjFindByName(&driver->nwfilters, inc->filterref);
if (obj) {
if (obj->wantRemoved) {
virNWFilterReportError(VIR_ERR_NO_NWFILTER,
_("Filter '%s' is in use."),
inc->filterref);
rc = 1;
virNWFilterObjUnlock(obj);
break;
}
/* create a temporary hashmap for depth-first tree traversal */
virNWFilterHashTablePtr tmpvars =
virNWFilterCreateVarsFrom(inc->params,
vars);
if (!tmpvars) {
virReportOOMError();
rc = 1;
virNWFilterObjUnlock(obj);
break;
}
next_filter = obj->def;
switch (useNewFilter) {
case INSTANTIATE_FOLLOW_NEWFILTER:
if (obj->newDef) {
next_filter = obj->newDef;
*foundNewFilter = true;
}
break;
case INSTANTIATE_ALWAYS:
break;
}
rc = _virNWFilterInstantiateRec(conn,
techdriver,
nettype,
next_filter,
ifname,
tmpvars,
nEntries, insts,
useNewFilter,
foundNewFilter,
driver);
virNWFilterHashTableFree(tmpvars);
virNWFilterObjUnlock(obj);
if (rc)
break;
} else {
virNWFilterReportError(VIR_ERR_INTERNAL_ERROR,
_("referenced filter '%s' is missing"),
inc->filterref);
rc = 1;
break;
}
}
}
return rc;
}
static int
virNWFilterDetermineMissingVarsRec(virConnectPtr conn,
virNWFilterDefPtr filter,
virNWFilterHashTablePtr vars,
virNWFilterHashTablePtr missing_vars,
int useNewFilter,
virNWFilterDriverStatePtr driver)
{
virNWFilterObjPtr obj;
int rc = 0;
int i, j;
virNWFilterDefPtr next_filter;
for (i = 0; i < filter->nentries; i++) {
virNWFilterRuleDefPtr rule = filter->filterEntries[i]->rule;
virNWFilterIncludeDefPtr inc = filter->filterEntries[i]->include;
if (rule) {
/* check all variables of this rule */
for (j = 0; j < rule->nvars; j++) {
if (!virHashLookup(vars->hashTable, rule->vars[j])) {
virNWFilterHashTablePut(missing_vars, rule->vars[j],
strdup("1"), 1);
}
}
} else if (inc) {
VIR_DEBUG("Following filter %s\n", inc->filterref);
obj = virNWFilterObjFindByName(&driver->nwfilters, inc->filterref);
if (obj) {
if (obj->wantRemoved) {
virNWFilterReportError(VIR_ERR_NO_NWFILTER,
_("Filter '%s' is in use."),
inc->filterref);
rc = 1;
virNWFilterObjUnlock(obj);
break;
}
/* create a temporary hashmap for depth-first tree traversal */
virNWFilterHashTablePtr tmpvars =
virNWFilterCreateVarsFrom(inc->params,
vars);
if (!tmpvars) {
virReportOOMError();
rc = 1;
virNWFilterObjUnlock(obj);
break;
}
next_filter = obj->def;
switch (useNewFilter) {
case INSTANTIATE_FOLLOW_NEWFILTER:
if (obj->newDef) {
next_filter = obj->newDef;
}
break;
case INSTANTIATE_ALWAYS:
break;
}
rc = virNWFilterDetermineMissingVarsRec(conn,
next_filter,
tmpvars,
missing_vars,
useNewFilter,
driver);
virNWFilterHashTableFree(tmpvars);
virNWFilterObjUnlock(obj);
if (rc)
break;
} else {
virNWFilterReportError(VIR_ERR_INTERNAL_ERROR,
_("referenced filter '%s' is missing"),
inc->filterref);
rc = 1;
break;
}
}
}
return rc;
}
virNWFilterObjPtr
virNWFilterObjListAssignDef(virNWFilterObjListPtr nwfilters,
virNWFilterDefPtr def)
{
virNWFilterObjPtr obj;
virNWFilterDefPtr objdef;
if ((obj = virNWFilterObjListFindByUUID(nwfilters, def->uuid))) {
objdef = obj->def;
if (STRNEQ(def->name, objdef->name)) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("filter with same UUID but different name "
"('%s') already exists"),
objdef->name);
virNWFilterObjUnlock(obj);
return NULL;
}
virNWFilterObjUnlock(obj);
} else {
if ((obj = virNWFilterObjListFindByName(nwfilters, def->name))) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
objdef = obj->def;
virUUIDFormat(objdef->uuid, uuidstr);
virReportError(VIR_ERR_OPERATION_FAILED,
_("filter '%s' already exists with uuid %s"),
def->name, uuidstr);
virNWFilterObjUnlock(obj);
return NULL;
}
}
if (virNWFilterObjListDefLoopDetect(nwfilters, def) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("filter would introduce a loop"));
return NULL;
}
if ((obj = virNWFilterObjListFindByName(nwfilters, def->name))) {
objdef = obj->def;
if (virNWFilterDefEqual(def, objdef, false)) {
virNWFilterDefFree(objdef);
obj->def = def;
return obj;
}
obj->newDef = def;
/* trigger the update on VMs referencing the filter */
if (virNWFilterTriggerVMFilterRebuild() < 0) {
obj->newDef = NULL;
virNWFilterObjUnlock(obj);
return NULL;
}
virNWFilterDefFree(objdef);
obj->def = def;
obj->newDef = NULL;
return obj;
}
if (!(obj = virNWFilterObjNew()))
return NULL;
if (VIR_APPEND_ELEMENT_COPY(nwfilters->objs,
nwfilters->count, obj) < 0) {
virNWFilterObjUnlock(obj);
virNWFilterObjFree(obj);
return NULL;
}
obj->def = def;
return obj;
}
/*
* Call this function while holding the NWFilter filter update lock
*/
static int
__virNWFilterInstantiateFilter(virConnectPtr conn,
bool teardownOld,
const char *ifname,
int ifindex,
const char *linkdev,
enum virDomainNetType nettype,
const unsigned char *macaddr,
const char *filtername,
virNWFilterHashTablePtr filterparams,
enum instCase useNewFilter,
virNWFilterDriverStatePtr driver,
bool forceWithPendingReq,
bool *foundNewFilter)
{
int rc;
const char *drvname = EBIPTABLES_DRIVER_ID;
virNWFilterTechDriverPtr techdriver;
virNWFilterObjPtr obj;
virNWFilterHashTablePtr vars, vars1;
virNWFilterDefPtr filter;
char vmmacaddr[VIR_MAC_STRING_BUFLEN] = {0};
char *str_macaddr = NULL;
const char *ipaddr;
char *str_ipaddr = NULL;
techdriver = virNWFilterTechDriverForName(drvname);
if (!techdriver) {
virNWFilterReportError(VIR_ERR_INTERNAL_ERROR,
_("Could not get access to ACL tech "
"driver '%s'"),
drvname);
return 1;
}
VIR_DEBUG("filter name: %s", filtername);
obj = virNWFilterObjFindByName(&driver->nwfilters, filtername);
if (!obj) {
virNWFilterReportError(VIR_ERR_NO_NWFILTER,
_("Could not find filter '%s'"),
filtername);
return 1;
}
if (obj->wantRemoved) {
virNWFilterReportError(VIR_ERR_NO_NWFILTER,
_("Filter '%s' is in use."),
filtername);
rc = 1;
goto err_exit;
}
virFormatMacAddr(macaddr, vmmacaddr);
str_macaddr = strdup(vmmacaddr);
if (!str_macaddr) {
virReportOOMError();
rc = 1;
goto err_exit;
}
ipaddr = virNWFilterGetIpAddrForIfname(ifname);
if (ipaddr) {
str_ipaddr = strdup(ipaddr);
if (!str_ipaddr) {
virReportOOMError();
rc = 1;
goto err_exit;
}
}
vars1 = virNWFilterCreateVarHashmap(str_macaddr, str_ipaddr);
if (!vars1) {
rc = 1;
goto err_exit;
}
str_macaddr = NULL;
str_ipaddr = NULL;
vars = virNWFilterCreateVarsFrom(vars1,
filterparams);
if (!vars) {
rc = 1;
goto err_exit_vars1;
}
filter = obj->def;
switch (useNewFilter) {
case INSTANTIATE_FOLLOW_NEWFILTER:
if (obj->newDef) {
filter = obj->newDef;
*foundNewFilter = true;
}
break;
case INSTANTIATE_ALWAYS:
break;
}
rc = virNWFilterInstantiate(conn,
techdriver,
nettype,
filter,
ifname,
ifindex,
linkdev,
vars,
useNewFilter, foundNewFilter,
teardownOld,
macaddr,
driver,
forceWithPendingReq);
virNWFilterHashTableFree(vars);
err_exit_vars1:
virNWFilterHashTableFree(vars1);
err_exit:
virNWFilterObjUnlock(obj);
VIR_FREE(str_ipaddr);
VIR_FREE(str_macaddr);
return rc;
}
