/*
* sepgsql_relation_setattr
*
* It checks privileges to set attribute of the supplied relation
*/
void
sepgsql_relation_setattr(Oid relOid)
{
Relation rel;
ScanKeyData skey;
SysScanDesc sscan;
HeapTuple oldtup;
HeapTuple newtup;
Form_pg_class oldform;
Form_pg_class newform;
ObjectAddress object;
char *audit_name;
uint16_t tclass;
switch (get_rel_relkind(relOid))
{
case RELKIND_RELATION:
tclass = SEPG_CLASS_DB_TABLE;
break;
case RELKIND_SEQUENCE:
tclass = SEPG_CLASS_DB_SEQUENCE;
break;
case RELKIND_VIEW:
tclass = SEPG_CLASS_DB_VIEW;
break;
case RELKIND_INDEX:
/* deal with indexes specially */
sepgsql_index_modify(relOid);
return;
default:
/* other relkinds don't need additional work */
return;
}
/*
* Fetch newer catalog
*/
rel = heap_open(RelationRelationId, AccessShareLock);
ScanKeyInit(&skey,
ObjectIdAttributeNumber,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(relOid));
sscan = systable_beginscan(rel, ClassOidIndexId, true,
SnapshotSelf, 1, &skey);
newtup = systable_getnext(sscan);
if (!HeapTupleIsValid(newtup))
elog(ERROR, "catalog lookup failed for relation %u", relOid);
newform = (Form_pg_class) GETSTRUCT(newtup);
/*
* Fetch older catalog
*/
oldtup = SearchSysCache1(RELOID, ObjectIdGetDatum(relOid));
if (!HeapTupleIsValid(oldtup))
elog(ERROR, "cache lookup failed for relation %u", relOid);
oldform = (Form_pg_class) GETSTRUCT(oldtup);
/*
* Does this ALTER command takes operation to namespace?
*/
if (newform->relnamespace != oldform->relnamespace)
{
sepgsql_schema_remove_name(oldform->relnamespace);
sepgsql_schema_add_name(newform->relnamespace);
}
if (strcmp(NameStr(newform->relname), NameStr(oldform->relname)) != 0)
sepgsql_schema_rename(oldform->relnamespace);
/*
* XXX - In the future version, db_tuple:{use} of system catalog entry
* shall be checked, if tablespace configuration is changed.
*/
/*
* check db_xxx:{setattr} permission
*/
object.classId = RelationRelationId;
object.objectId = relOid;
object.objectSubId = 0;
audit_name = getObjectIdentity(&object);
sepgsql_avc_check_perms(&object,
tclass,
SEPG_DB_TABLE__SETATTR,
audit_name,
true);
pfree(audit_name);
ReleaseSysCache(oldtup);
systable_endscan(sscan);
heap_close(rel, AccessShareLock);
}
/*
* sepgsql_proc_setattr
*
* It checks privileges to alter the supplied function.
*/
void
sepgsql_proc_setattr(Oid functionId)
{
Relation rel;
ScanKeyData skey;
SysScanDesc sscan;
HeapTuple oldtup;
HeapTuple newtup;
Form_pg_proc oldform;
Form_pg_proc newform;
uint32 required;
ObjectAddress object;
char *audit_name;
/*
* Fetch newer catalog
*/
rel = heap_open(ProcedureRelationId, AccessShareLock);
ScanKeyInit(&skey,
ObjectIdAttributeNumber,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(functionId));
sscan = systable_beginscan(rel, ProcedureOidIndexId, true,
SnapshotSelf, 1, &skey);
newtup = systable_getnext(sscan);
if (!HeapTupleIsValid(newtup))
elog(ERROR, "catalog lookup failed for function %u", functionId);
newform = (Form_pg_proc) GETSTRUCT(newtup);
/*
* Fetch older catalog
*/
oldtup = SearchSysCache1(PROCOID, ObjectIdGetDatum(functionId));
if (!HeapTupleIsValid(oldtup))
elog(ERROR, "cache lookup failed for function %u", functionId);
oldform = (Form_pg_proc) GETSTRUCT(oldtup);
/*
* Does this ALTER command takes operation to namespace?
*/
if (newform->pronamespace != oldform->pronamespace)
{
sepgsql_schema_remove_name(oldform->pronamespace);
sepgsql_schema_add_name(oldform->pronamespace);
}
if (strcmp(NameStr(newform->proname), NameStr(oldform->proname)) != 0)
sepgsql_schema_rename(oldform->pronamespace);
/*
* check db_procedure:{setattr (install)} permission
*/
required = SEPG_DB_PROCEDURE__SETATTR;
if (!oldform->proleakproof && newform->proleakproof)
required |= SEPG_DB_PROCEDURE__INSTALL;
object.classId = ProcedureRelationId;
object.objectId = functionId;
object.objectSubId = 0;
audit_name = getObjectIdentity(&object);
sepgsql_avc_check_perms(&object,
SEPG_CLASS_DB_PROCEDURE,
required,
audit_name,
true);
/* cleanups */
pfree(audit_name);
ReleaseSysCache(oldtup);
systable_endscan(sscan);
heap_close(rel, AccessShareLock);
}
