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service_chaining.cc
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service_chaining.cc
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/*
* Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
*/
#include "bgp/routing-instance/service_chaining.h"
#include <boost/foreach.hpp>
#include <algorithm>
#include "base/task_annotations.h"
#include "bgp/bgp_log.h"
#include "bgp/bgp_peer_membership.h"
#include "bgp/extended-community/load_balance.h"
#include "bgp/extended-community/site_of_origin.h"
#include "bgp/inet6vpn/inet6vpn_route.h"
#include "bgp/l3vpn/inetvpn_route.h"
#include "bgp/origin-vn/origin_vn.h"
#include "bgp/routing-instance/routing_instance.h"
#include "bgp/routing-instance/service_chaining_types.h"
#include "net/community_type.h"
using boost::bind;
using boost::system::error_code;
using std::make_pair;
using std::sort;
using std::string;
using std::vector;
template<>
int ServiceChainMgr<ServiceChainInet>::service_chain_task_id_ = -1;
template<>
int ServiceChainMgr<ServiceChainInet6>::service_chain_task_id_ = -1;
static int GetOriginVnIndex(const BgpTable *table, const BgpRoute *route) {
const BgpPath *path = route->BestPath();
if (!path)
return 0;
const BgpAttr *attr = path->GetAttr();
const ExtCommunity *ext_community = attr->ext_community();
if (ext_community) {
BOOST_FOREACH(const ExtCommunity::ExtCommunityValue &comm,
ext_community->communities()) {
if (!ExtCommunity::is_origin_vn(comm))
continue;
OriginVn origin_vn(comm);
return origin_vn.vn_index();
}
}
if (path->IsVrfOriginated())
return table->routing_instance()->virtual_network_index();
return 0;
}
template <typename T>
ServiceChain<T>::ServiceChain(ServiceChainMgrT *manager, RoutingInstance *src,
RoutingInstance *dest, RoutingInstance *connected,
const vector<string> &subnets, AddressT addr)
: manager_(manager),
src_(src),
dest_(dest),
connected_(connected),
connected_route_(NULL),
service_chain_addr_(addr),
connected_table_unregistered_(false),
dest_table_unregistered_(false),
aggregate_(false),
src_table_delete_ref_(this, src_table()->deleter()) {
for (vector<string>::const_iterator it = subnets.begin();
it != subnets.end(); ++it) {
error_code ec;
PrefixT ipam_subnet = PrefixT::FromString(*it, &ec);
if (ec != 0)
continue;
prefix_to_routelist_map_[ipam_subnet] = RouteList();
}
}
template <typename T>
BgpTable *ServiceChain<T>::src_table() const {
return src_->GetTable(GetFamily());
}
template <typename T>
BgpTable *ServiceChain<T>::connected_table() const {
return connected_->GetTable(GetFamily());
}
template <typename T>
BgpTable *ServiceChain<T>::dest_table() const {
return dest_->GetTable(GetFamily());
}
//
// Compare this ServiceChain against the ServiceChainConfig.
// Return true if the configuration has not changed, false otherwise.
//
template <typename T>
bool ServiceChain<T>::CompareServiceChainConfig(
const ServiceChainConfig &config) {
if (dest_->name() != config.routing_instance)
return false;
if (connected_->name() != config.source_routing_instance)
return false;
if (service_chain_addr_.to_string() != config.service_chain_address)
return false;
if (prefix_to_routelist_map_.size() != config.prefix.size())
return false;
for (vector<string>::const_iterator it = config.prefix.begin();
it != config.prefix.end(); ++it) {
error_code ec;
PrefixT ipam_subnet = PrefixT::FromString(*it, &ec);
if (prefix_to_routelist_map_.find(ipam_subnet) ==
prefix_to_routelist_map_.end()) {
return false;
}
}
return true;
}
//
// Match function called from BgpConditionListener
// Concurrency : db::DBTable
// For the purpose of route aggregation, two condition needs to be matched
// 1. More specific route present in any of the Dest BgpTable partition
// 2. Connected route(for nexthop) present in Src BgpTable
//
template <typename T>
bool ServiceChain<T>::Match(BgpServer *server, BgpTable *table, BgpRoute *route,
bool deleted) {
CHECK_CONCURRENCY("db::DBTable");
typename ServiceChainRequestT::RequestType type;
PrefixT aggregate_match;
if (table == dest_table() && !dest_table_unregistered()) {
if (IsConnectedRoute(route))
return false;
if (aggregate_enable() && IsAggregate(route))
return false;
if (aggregate_enable() && IsMoreSpecific(route, &aggregate_match)) {
// More specific
if (deleted) {
type = ServiceChainRequestT::MORE_SPECIFIC_DELETE;
} else {
type = ServiceChainRequestT::MORE_SPECIFIC_ADD_CHG;
}
} else {
// External connecting routes
if (!deleted) {
if (!route->BestPath() || !route->BestPath()->IsFeasible()) {
deleted = true;
} else {
const BgpAttr *attr = route->BestPath()->GetAttr();
const Community *comm = attr ? attr->community() : NULL;
if (comm) {
if ((comm->ContainsValue(CommunityType::NoAdvertise)) ||
(comm->ContainsValue(CommunityType::NoReOriginate)))
deleted = true;
}
int vn_index = GetOriginVnIndex(table, route);
int src_vn_index = src_->virtual_network_index();
int dest_vn_index = dest_->virtual_network_index();
if (!vn_index || dest_vn_index != vn_index) {
if (src_vn_index == vn_index)
deleted = true;
if (!dest_->virtual_network_allow_transit())
deleted = true;
if (!dest_vn_index)
deleted = true;
}
OriginVn src_origin_vn(
server->autonomous_system(), src_vn_index);
const OriginVnPath *ovnpath =
attr ? attr->origin_vn_path() : NULL;
if (ovnpath &&
ovnpath->Contains(src_origin_vn.GetExtCommunity())) {
deleted = true;
}
}
}
if (deleted) {
type = ServiceChainRequestT::EXT_CONNECT_ROUTE_DELETE;
} else {
type = ServiceChainRequestT::EXT_CONNECT_ROUTE_ADD_CHG;
}
}
} else if ((table == connected_table()) &&
!connected_table_unregistered() &&
IsConnectedRoute(route)) {
if (!deleted) {
if (!route->IsValid() ||
route->BestPath()->GetSource() != BgpPath::BGP_XMPP) {
deleted = true;
}
}
// Connected route for service chain
if (deleted) {
type = ServiceChainRequestT::CONNECTED_ROUTE_DELETE;
} else {
type = ServiceChainRequestT::CONNECTED_ROUTE_ADD_CHG;
}
} else {
return false;
}
BgpConditionListener *listener = server->condition_listener(GetFamily());
ServiceChainState *state = static_cast<ServiceChainState *>(
listener->GetMatchState(table, route, this));
if (!deleted) {
// MatchState is added to the Route to ensure that DBEntry is not
// deleted before the ServiceChain module processes the WorkQueue
// request.
if (!state) {
state = new ServiceChainState(ServiceChainPtr(this));
listener->SetMatchState(table, route, this, state);
}
} else {
// MatchState is set on all the Routes that matches the conditions
// Retrieve to check and ignore delete of unseen Add Match
if (state == NULL) {
// Not seen ADD ignore DELETE
return false;
}
}
// The MatchState reference is taken to ensure that the route is not
// deleted when request is still present in the queue
// This is to handle the case where MatchState already exists and
// deleted entry gets reused or reused entry gets deleted.
state->IncrementRefCnt();
// Post the Match result to ServiceChain task to take Action
// More_Specific_Present + Connected_Route_exists ==> Add Aggregate Route
// and stitch the nexthop from connected route
ServiceChainRequestT *req = new ServiceChainRequestT(
type, table, route, aggregate_match, ServiceChainPtr(this));
manager_->Enqueue(req);
return true;
}
template <typename T>
string ServiceChain<T>::ToString() const {
return (string("ServiceChain " ) + service_chain_addr_.to_string());
}
template <typename T>
void ServiceChain<T>::SetConnectedRoute(BgpRoute *connected) {
connected_route_ = connected;
connected_path_ids_.clear();
if (!connected_route_)
return;
for (Route::PathList::iterator it = connected->GetPathList().begin();
it != connected->GetPathList().end(); ++it) {
BgpPath *path = static_cast<BgpPath *>(it.operator->());
// Infeasible paths are not considered.
if (!path->IsFeasible())
break;
// Bail if it's not ECMP with the best path.
if (connected_route_->BestPath()->PathCompare(*path, true))
break;
// Use nexthop attribute of connected path as path id.
uint32_t path_id = path->GetAttr()->nexthop().to_v4().to_ulong();
connected_path_ids_.insert(path_id);
}
}
template <typename T>
bool ServiceChain<T>::IsConnectedRouteValid() const {
return (connected_route_ && connected_route_->IsValid());
}
template <typename T>
bool ServiceChain<T>::IsMoreSpecific(BgpRoute *route,
PrefixT *aggregate_match) const {
const RouteT *ip_route = static_cast<RouteT *>(route);
const PrefixT &ip_prefix = ip_route->GetPrefix();
for (typename PrefixToRouteListMap::const_iterator it =
prefix_to_route_list_map()->begin();
it != prefix_to_route_list_map()->end(); ++it) {
if (ip_prefix.IsMoreSpecific(it->first)) {
*aggregate_match = it->first;
return true;
}
}
return false;
}
template <typename T>
bool ServiceChain<T>::IsAggregate(BgpRoute *route) const {
RouteT *ip_route = dynamic_cast<RouteT *>(route);
for (typename PrefixToRouteListMap::const_iterator it =
prefix_to_route_list_map()->begin();
it != prefix_to_route_list_map()->end(); ++it) {
if (it->first == ip_route->GetPrefix())
return true;
}
return false;
}
template <typename T>
bool ServiceChain<T>::IsConnectedRoute(BgpRoute *route) const {
RouteT *ip_route = dynamic_cast<RouteT *>(route);
return (service_chain_addr() == ip_route->GetPrefix().addr());
}
template <typename T>
void ServiceChain<T>::RemoveMatchState(BgpRoute *route,
ServiceChainState *state) {
if (deleted() || route->IsDeleted()) {
// At this point we are ready to release the MatchState on the DBEntry
// So mark it as deleted.. Actual removal of the state is done when
// ref count is 0
state->set_deleted();
}
}
// RemoveServiceChainRoute
template <typename T>
void ServiceChain<T>::RemoveServiceChainRoute(PrefixT prefix, bool aggregate) {
CHECK_CONCURRENCY("bgp::ServiceChain");
BgpTable *bgptable = src_table();
RouteT rt_key(prefix);
DBTablePartition *partition =
static_cast<DBTablePartition *>(bgptable->GetTablePartition(&rt_key));
BgpRoute *service_chain_route =
static_cast<BgpRoute *>(partition->Find(&rt_key));
if (!service_chain_route || service_chain_route->IsDeleted())
return;
for (ConnectedPathIdList::const_iterator it = GetConnectedPathIds().begin();
it != GetConnectedPathIds().end(); ++it) {
uint32_t path_id = *it;
service_chain_route->RemovePath(BgpPath::ServiceChain, NULL, path_id);
BGP_LOG_STR(BgpMessage, SandeshLevel::SYS_DEBUG, BGP_LOG_FLAG_TRACE,
"Removed " << (aggregate ? "Aggregate" : "ExtConnected") <<
" ServiceChain path " << service_chain_route->ToString() <<
" path_id " << BgpPath::PathIdString(path_id) <<
" in table " << bgptable->name());
}
if (!service_chain_route->BestPath()) {
partition->Delete(service_chain_route);
} else {
partition->Notify(service_chain_route);
}
}
// AddServiceChainRoute
template <typename T>
void ServiceChain<T>::AddServiceChainRoute(PrefixT prefix,
const RouteT *orig_route, const ConnectedPathIdList &old_path_ids,
bool aggregate) {
CHECK_CONCURRENCY("bgp::ServiceChain");
BgpTable *bgptable = src_table();
RouteT rt_key(prefix);
DBTablePartition *partition =
static_cast<DBTablePartition *>(bgptable->GetTablePartition(&rt_key));
BgpRoute *service_chain_route =
static_cast<BgpRoute *>(partition->Find(&rt_key));
if (service_chain_route == NULL) {
service_chain_route = new RouteT(prefix);
partition->Add(service_chain_route);
} else {
service_chain_route->ClearDelete();
}
int vn_index = dest_routing_instance()->virtual_network_index();
BgpServer *server = dest_routing_instance()->server();
OriginVn origin_vn(server->autonomous_system(), vn_index);
SiteOfOrigin soo;
ExtCommunity::ExtCommunityList sgid_list;
LoadBalance load_balance;
bool load_balance_present = false;
const Community *orig_community = NULL;
const OriginVnPath *orig_ovnpath = NULL;
if (orig_route) {
const BgpPath *orig_path = orig_route->BestPath();
const BgpAttr *orig_attr = NULL;
const ExtCommunity *ext_community = NULL;
if (orig_path)
orig_attr = orig_path->GetAttr();
if (orig_attr) {
orig_community = orig_attr->community();
ext_community = orig_attr->ext_community();
orig_ovnpath = orig_attr->origin_vn_path();
}
if (ext_community) {
BOOST_FOREACH(const ExtCommunity::ExtCommunityValue &comm,
ext_community->communities()) {
if (ExtCommunity::is_security_group(comm))
sgid_list.push_back(comm);
if (ExtCommunity::is_site_of_origin(comm) && soo.IsNull())
soo = SiteOfOrigin(comm);
if (ExtCommunity::is_load_balance(comm)) {
load_balance = LoadBalance(comm);
load_balance_present = true;
}
}
}
}
BgpAttrDB *attr_db = server->attr_db();
CommunityDB *comm_db = server->comm_db();
CommunityPtr new_community = comm_db->AppendAndLocate(
orig_community, CommunityType::AcceptOwnNexthop);
ExtCommunityDB *extcomm_db = server->extcomm_db();
PeerRibMembershipManager *membership_mgr = server->membership_mgr();
OriginVnPathDB *ovnpath_db = server->ovnpath_db();
OriginVnPathPtr new_ovnpath =
ovnpath_db->PrependAndLocate(orig_ovnpath, origin_vn.GetExtCommunity());
ConnectedPathIdList new_path_ids;
for (Route::PathList::iterator it =
connected_route()->GetPathList().begin();
it != connected_route()->GetPathList().end(); ++it) {
BgpPath *connected_path = static_cast<BgpPath *>(it.operator->());
// Infeasible paths are not considered
if (!connected_path->IsFeasible())
break;
// take snapshot of all ECMP paths
if (connected_route()->BestPath()->PathCompare(*connected_path, true))
break;
// Skip paths with duplicate forwarding information. This ensures
// that we generate only one path with any given next hop and label
// when there are multiple connected paths from the original source
// received via different peers e.g. directly via XMPP and via BGP.
if (connected_route()->DuplicateForwardingPath(connected_path))
continue;
const BgpAttr *attr = connected_path->GetAttr();
ExtCommunityPtr new_ext_community;
// Strip any RouteTargets from the connected attributes.
new_ext_community = extcomm_db->ReplaceRTargetAndLocate(
attr->ext_community(), ExtCommunity::ExtCommunityList());
// Replace the SGID list with the list from the original route.
new_ext_community = extcomm_db->ReplaceSGIDListAndLocate(
new_ext_community.get(), sgid_list);
// Replace SiteOfOrigin with value from original route if any.
if (soo.IsNull()) {
new_ext_community = extcomm_db->RemoveSiteOfOriginAndLocate(
new_ext_community.get());
} else {
new_ext_community = extcomm_db->ReplaceSiteOfOriginAndLocate(
new_ext_community.get(), soo.GetExtCommunity());
}
// Inherit load balance attribute of orig_route if connected path
// does not have one already.
if (!LoadBalance::IsPresent(connected_path) && load_balance_present) {
new_ext_community = extcomm_db->AppendAndLocate(
new_ext_community.get(), load_balance.GetExtCommunity());
}
// Replace the OriginVn with the value from the original route
// or the value associated with the dest routing instance.
new_ext_community = extcomm_db->ReplaceOriginVnAndLocate(
new_ext_community.get(), origin_vn.GetExtCommunity());
// Replace extended community, community and origin vn path.
BgpAttrPtr new_attr = attr_db->ReplaceExtCommunityAndLocate(
attr, new_ext_community);
new_attr =
attr_db->ReplaceCommunityAndLocate(new_attr.get(), new_community);
new_attr = attr_db->ReplaceOriginVnPathAndLocate(new_attr.get(),
new_ovnpath);
// Strip aspath. This is required when the connected route is
// learnt via BGP.
new_attr = attr_db->ReplaceAsPathAndLocate(new_attr.get(), AsPathPtr());
// If the connected path is learnt via XMPP, construct RD based on
// the id registered with source table instead of connected table.
// This allows chaining of multiple in-network service instances
// that are on the same compute node.
const IPeer *peer = connected_path->GetPeer();
if (src_ != connected_ && peer && peer->IsXmppPeer()) {
int id = membership_mgr->GetRegistrationId(peer, bgptable);
if (id < 0)
continue;
RouteDistinguisher connected_rd = attr->source_rd();
if (connected_rd.Type() != RouteDistinguisher::TypeIpAddressBased)
continue;
RouteDistinguisher rd(connected_rd.GetAddress(), id);
new_attr = attr_db->ReplaceSourceRdAndLocate(new_attr.get(), rd);
}
// Replace the source rd if the connected path is a secondary path
// of a primary path in the l3vpn table. Use the RD of the primary.
if (connected_path->IsReplicated()) {
const BgpSecondaryPath *spath =
static_cast<const BgpSecondaryPath *>(connected_path);
const RoutingInstance *ri = spath->src_table()->routing_instance();
if (ri->IsDefaultRoutingInstance()) {
const VpnRouteT *vpn_route =
static_cast<const VpnRouteT *>(spath->src_rt());
new_attr = attr_db->ReplaceSourceRdAndLocate(new_attr.get(),
vpn_route->GetPrefix().route_distinguisher());
}
}
// Check whether we already have a path with the associated path id.
uint32_t path_id =
connected_path->GetAttr()->nexthop().to_v4().to_ulong();
BgpPath *existing_path =
service_chain_route->FindPath(BgpPath::ServiceChain, NULL,
path_id);
bool is_stale = false;
bool path_updated = false;
if (existing_path != NULL) {
// Existing path can be reused.
if ((new_attr.get() == existing_path->GetAttr()) &&
(connected_path->GetLabel() == existing_path->GetLabel())) {
new_path_ids.insert(path_id);
continue;
}
// Remove existing path, new path will be added below.
path_updated = true;
is_stale = existing_path->IsStale();
service_chain_route->RemovePath(
BgpPath::ServiceChain, NULL, path_id);
}
BgpPath *new_path =
new BgpPath(path_id, BgpPath::ServiceChain, new_attr.get(),
connected_path->GetFlags(), connected_path->GetLabel());
if (is_stale)
new_path->SetStale();
new_path_ids.insert(path_id);
service_chain_route->InsertPath(new_path);
partition->Notify(service_chain_route);
BGP_LOG_STR(BgpMessage, SandeshLevel::SYS_DEBUG, BGP_LOG_FLAG_TRACE,
(path_updated ? "Updated " : "Added ") <<
(aggregate ? "Aggregate" : "ExtConnected") <<
" ServiceChain path " << service_chain_route->ToString() <<
" path_id " << BgpPath::PathIdString(path_id) <<
" in table " << bgptable->name());
}
// Remove stale paths.
for (ConnectedPathIdList::const_iterator it = old_path_ids.begin();
it != old_path_ids.end(); ++it) {
uint32_t path_id = *it;
if (new_path_ids.find(path_id) != new_path_ids.end())
continue;
service_chain_route->RemovePath(BgpPath::ServiceChain, NULL, path_id);
partition->Notify(service_chain_route);
BGP_LOG_STR(BgpMessage, SandeshLevel::SYS_DEBUG, BGP_LOG_FLAG_TRACE,
"Removed " << (aggregate ? "Aggregate" : "ExtConnected") <<
" ServiceChain path " << service_chain_route->ToString() <<
" path_id " << BgpPath::PathIdString(path_id) <<
" in table " << bgptable->name());
}
// Delete the route if there's no paths.
if (!service_chain_route->BestPath())
partition->Delete(service_chain_route);
}
template <typename T>
bool ServiceChain<T>::AddMoreSpecific(PrefixT aggregate,
BgpRoute *more_specific) {
typename PrefixToRouteListMap::iterator it =
prefix_to_routelist_map_.find(aggregate);
assert(it != prefix_to_routelist_map_.end());
bool ret = false;
if (it->second.empty()) {
// Add the aggregate for the first time
ret = true;
}
it->second.insert(more_specific);
return ret;
}
template <typename T>
bool ServiceChain<T>::DeleteMoreSpecific(PrefixT aggregate,
BgpRoute *more_specific) {
typename PrefixToRouteListMap::iterator it =
prefix_to_routelist_map_.find(aggregate);
assert(it != prefix_to_routelist_map_.end());
it->second.erase(more_specific);
return it->second.empty();
}
template <typename T>
void ServiceChain<T>::FillServiceChainInfo(ShowServicechainInfo *info) const {
info->set_src_rt_instance(src_routing_instance()->name());
info->set_connected_rt_instance(connected_routing_instance()->name());
info->set_dest_rt_instance(dest_routing_instance()->name());
info->set_state(deleted() ? "deleted" : "active");
ConnectedRouteInfo connected_rt_info;
connected_rt_info.set_service_chain_addr(
service_chain_addr().to_string());
if (connected_route()) {
ShowRoute show_route;
connected_route()->FillRouteInfo(connected_table(), &show_route);
connected_rt_info.set_connected_rt(show_route);
}
info->set_connected_route(connected_rt_info);
vector<PrefixToRouteListInfo> more_vec;
for (typename PrefixToRouteListMap::const_iterator it =
prefix_to_route_list_map()->begin();
it != prefix_to_route_list_map()->end(); ++it) {
PrefixToRouteListInfo prefix_list_info;
prefix_list_info.set_prefix(it->first.ToString());
BgpTable *bgptable = src_table();
RouteT rt_key(it->first);
BgpRoute *aggregate = static_cast<BgpRoute *>(bgptable->Find(&rt_key));
if (aggregate) {
prefix_list_info.set_aggregate(true);
ShowRoute show_route;
aggregate->FillRouteInfo(bgptable, &show_route);
prefix_list_info.set_aggregate_rt(show_route);
} else {
prefix_list_info.set_aggregate(false);
}
vector<string> rt_list;
for (RouteList::iterator rt_it = it->second.begin();
rt_it != it->second.end(); ++rt_it) {
rt_list.push_back((*rt_it)->ToString());
}
prefix_list_info.set_more_specific_list(rt_list);
more_vec.push_back(prefix_list_info);
}
info->set_more_specifics(more_vec);
vector<ExtConnectRouteInfo> ext_connecting_rt_info_list;
for (ExtConnectRouteList::const_iterator it =
ext_connecting_routes().begin();
it != ext_connecting_routes().end(); ++it) {
ExtConnectRouteInfo ext_rt_info;
ext_rt_info.set_ext_rt_prefix((*it)->ToString());
BgpTable *bgptable = src_table();
RouteT *ext_route = static_cast<RouteT *>(*it);
RouteT rt_key(ext_route->GetPrefix());
BgpRoute *ext_connecting =
static_cast<BgpRoute *>(bgptable->Find(&rt_key));
if (ext_connecting) {
ShowRoute show_route;
ext_connecting->FillRouteInfo(bgptable, &show_route);
ext_rt_info.set_ext_rt_svc_rt(show_route);
}
ext_connecting_rt_info_list.push_back(ext_rt_info);
}
info->set_ext_connecting_rt_info_list(ext_connecting_rt_info_list);
info->set_aggregate_enable(aggregate_enable());
}
template <typename T>
bool ServiceChainMgr<T>::RequestHandler(ServiceChainRequestT *req) {
CHECK_CONCURRENCY("bgp::ServiceChain");
BgpTable *table = NULL;
BgpRoute *route = NULL;
PrefixT aggregate_match = req->aggregate_match_;
ServiceChainT *info = NULL;
table = req->table_;
route = req->rt_;
info = static_cast<ServiceChainT *>(req->info_.get());
// Table where the aggregate route needs to be added
aggregate_match = req->aggregate_match_;
ServiceChainState *state = NULL;
if (route) {
state = static_cast<ServiceChainState *>
(listener_->GetMatchState(table, route, info));
}
switch (req->type_) {
case ServiceChainRequestT::MORE_SPECIFIC_ADD_CHG: {
assert(state);
if (state->deleted()) {
state->reset_deleted();
}
if (info->AddMoreSpecific(aggregate_match, route) &&
info->IsConnectedRouteValid()) {
// Add the aggregate route
typename ServiceChainT::ConnectedPathIdList path_ids;
info->AddServiceChainRoute(
aggregate_match, NULL, path_ids, true);
}
break;
}
case ServiceChainRequestT::MORE_SPECIFIC_DELETE: {
assert(state);
if (info->DeleteMoreSpecific(aggregate_match, route)) {
// Delete the aggregate route
info->RemoveServiceChainRoute(aggregate_match, true);
}
info->RemoveMatchState(route, state);
break;
}
case ServiceChainRequestT::CONNECTED_ROUTE_ADD_CHG: {
assert(state);
if (route->IsDeleted() || !route->BestPath() ||
!route->BestPath()->IsFeasible()) {
break;
}
if (state->deleted()) {
state->reset_deleted();
}
// Store the old path id list and populate the new one.
typename ServiceChainT::ConnectedPathIdList path_ids =
info->GetConnectedPathIds();
info->SetConnectedRoute(route);
typename ServiceChainT::PrefixToRouteListMap *vnprefix_list =
info->prefix_to_route_list_map();
for (typename ServiceChainT::PrefixToRouteListMap::iterator it =
vnprefix_list->begin(); it != vnprefix_list->end(); ++it) {
// Add aggregate route.. Or if the route exists
// sync the path and purge old paths
if (!it->second.empty())
info->AddServiceChainRoute(it->first, NULL, path_ids, true);
}
for (typename ServiceChainT::ExtConnectRouteList::iterator it =
info->ext_connecting_routes()->begin();
it != info->ext_connecting_routes()->end(); ++it) {
// Add ServiceChain route for external connecting route
RouteT *ext_route = static_cast<RouteT *>(*it);
info->AddServiceChainRoute(
ext_route->GetPrefix(), ext_route, path_ids, false);
}
break;
}
case ServiceChainRequestT::CONNECTED_ROUTE_DELETE: {
assert(state);
// Delete ServiceChain route for aggregate.
typename ServiceChainT::PrefixToRouteListMap *vnprefix_list =
info->prefix_to_route_list_map();
for (typename ServiceChainT::PrefixToRouteListMap::iterator it =
vnprefix_list->begin(); it != vnprefix_list->end(); ++it) {
info->RemoveServiceChainRoute(it->first, true);
}
// Delete ServiceChain routes for external connecting routes.
for (typename ServiceChainT::ExtConnectRouteList::iterator it =
info->ext_connecting_routes()->begin();
it != info->ext_connecting_routes()->end(); ++it) {
RouteT *ext_route = static_cast<RouteT *>(*it);
info->RemoveServiceChainRoute(ext_route->GetPrefix(), false);
}
info->RemoveMatchState(route, state);
info->SetConnectedRoute(NULL);
break;
}
case ServiceChainRequestT::EXT_CONNECT_ROUTE_ADD_CHG: {
assert(state);
if (state->deleted()) {
state->reset_deleted();
}
info->ext_connecting_routes()->insert(route);
if (info->IsConnectedRouteValid()) {
RouteT *ext_route = dynamic_cast<RouteT *>(route);
typename ServiceChainT::ConnectedPathIdList path_ids;
info->AddServiceChainRoute(
ext_route->GetPrefix(), ext_route, path_ids, false);
}
break;
}
case ServiceChainRequestT::EXT_CONNECT_ROUTE_DELETE: {
assert(state);
if (info->ext_connecting_routes()->erase(route)) {
RouteT *inet_route = dynamic_cast<RouteT *>(route);
info->RemoveServiceChainRoute(inet_route->GetPrefix(), false);
}
info->RemoveMatchState(route, state);
break;
}
case ServiceChainRequestT::UPDATE_ALL_ROUTES: {
if (info->dest_table_unregistered())
break;
if (info->connected_table_unregistered())
break;
if (!info->connected_route())
break;
typename ServiceChainT::ConnectedPathIdList path_ids =
info->GetConnectedPathIds();
typename ServiceChainT::PrefixToRouteListMap *vnprefix_list =
info->prefix_to_route_list_map();
for (typename ServiceChainT::PrefixToRouteListMap::iterator it =
vnprefix_list->begin(); it != vnprefix_list->end(); ++it) {
// Add aggregate route.. Or if the route exists
// sync the path and purge old paths
if (!it->second.empty())
info->AddServiceChainRoute(
it->first, NULL, path_ids, true);
}
for (typename ServiceChainT::ExtConnectRouteList::iterator it =
info->ext_connecting_routes()->begin();
it != info->ext_connecting_routes()->end(); ++it) {
// Add ServiceChain route for external connecting route
RouteT *ext_route = static_cast<RouteT *>(*it);
info->AddServiceChainRoute(
ext_route->GetPrefix(), ext_route, path_ids, false);
}
break;
}
case ServiceChainRequestT::STOP_CHAIN_DONE: {
if (table == info->connected_table()) {
info->set_connected_table_unregistered();
if (!info->num_matchstate()) {
listener_->UnregisterMatchCondition(table, info);
}
}
if (table == info->dest_table()) {
info->set_dest_table_unregistered();
if (!info->num_matchstate()) {
listener_->UnregisterMatchCondition(table, info);
}
}
if (info->unregistered()) {
chain_set_.erase(info->src_routing_instance());
StartResolve();
}
break;
}
default: {
assert(false);
break;
}
}
if (state) {
state->DecrementRefCnt();
if (state->refcnt() == 0 && state->deleted()) {
listener_->RemoveMatchState(table, route, info);
delete state;
if (!info->num_matchstate()) {
if (info->dest_table_unregistered()) {
listener_->UnregisterMatchCondition(info->dest_table(), info);
}
if (info->connected_table_unregistered()) {
listener_->UnregisterMatchCondition(
info->connected_table(), info);
}
if (info->unregistered()) {
chain_set_.erase(info->src_routing_instance());
StartResolve();
}
}
}
}
delete req;
return true;
}
template <typename T>
ServiceChainMgr<T>::ServiceChainMgr(BgpServer *server)
: server_(server),
listener_(server_->condition_listener(GetFamily())),
resolve_trigger_(new TaskTrigger(
bind(&ServiceChainMgr::ResolvePendingServiceChain, this),
TaskScheduler::GetInstance()->GetTaskId("bgp::Config"), 0)),
aggregate_host_route_(false) {
if (service_chain_task_id_ == -1) {
TaskScheduler *scheduler = TaskScheduler::GetInstance();
service_chain_task_id_ = scheduler->GetTaskId("bgp::ServiceChain");
}
process_queue_ =
new WorkQueue<ServiceChainRequestT *>(service_chain_task_id_, 0,
bind(&ServiceChainMgr::RequestHandler, this, _1));
id_ = server->routing_instance_mgr()->RegisterInstanceOpCallback(
bind(&ServiceChainMgr::RoutingInstanceCallback, this, _1, _2));
PeerRibMembershipManager *membership_mgr = server->membership_mgr();
registration_id_ = membership_mgr->RegisterPeerRegistrationCallback(
bind(&ServiceChainMgr::PeerRegistrationCallback, this, _1, _2, _3));
}
template <typename T>
ServiceChainMgr<T>::~ServiceChainMgr() {
delete process_queue_;
server_->routing_instance_mgr()->UnregisterInstanceOpCallback(id_);
PeerRibMembershipManager *membership_mgr = server_->membership_mgr();
membership_mgr->UnregisterPeerRegistrationCallback(registration_id_);
}
template <>
Address::Family ServiceChainMgr<ServiceChainInet>::GetFamily() const {
return Address::INET;
}
template <>
Address::Family ServiceChainMgr<ServiceChainInet6>::GetFamily() const {
return Address::INET6;
}
template <typename T>
void ServiceChainMgr<T>::Enqueue(ServiceChainRequestT *req) {
process_queue_->Enqueue(req);
}
template <typename T>
bool ServiceChainMgr<T>::IsPending(RoutingInstance *rtinstance) const {
return pending_chains_.find(rtinstance) != pending_chains_.end();
}
template <typename T>
bool ServiceChainMgr<T>::FillServiceChainInfo(RoutingInstance *rtinstance,
ShowServicechainInfo *info) const {
if (IsPending(rtinstance)) {
info->set_state("pending");
return true;
}
const ServiceChain<T> *service_chain = FindServiceChain(rtinstance);
if (!service_chain)
return false;
service_chain->FillServiceChainInfo(info);
return true;
}
template <typename T>
bool ServiceChainMgr<T>::LocateServiceChain(RoutingInstance *rtinstance,
const ServiceChainConfig &config) {
CHECK_CONCURRENCY("bgp::Config");
// Verify whether the entry already exists
ServiceChainMap::iterator it = chain_set_.find(rtinstance);
if (it != chain_set_.end()) {
ServiceChainT *chain = static_cast<ServiceChainT *>(it->second.get());
if (chain->CompareServiceChainConfig(config)) {
BGP_LOG_STR(BgpMessage, SandeshLevel::SYS_DEBUG, BGP_LOG_FLAG_TRACE,
"No update in ServiceChain config : " << rtinstance->name());
return true;
}
// Entry already exists. Update of match condition
// The routing instance to pending resolve such that
// service chain is created after stop done cb
AddPendingServiceChain(rtinstance);
if (it->second->deleted()) {
// Wait for the delete complete cb
return false;
}
BgpConditionListener::RequestDoneCb callback =
bind(&ServiceChainMgr::StopServiceChainDone, this, _1, _2);
listener_->RemoveMatchCondition(
chain->dest_table(), it->second.get(), callback);
listener_->RemoveMatchCondition(
chain->connected_table(), it->second.get(), callback);
return true;
}
RoutingInstanceMgr *mgr = server_->routing_instance_mgr();
RoutingInstance *dest = mgr->GetRoutingInstance(config.routing_instance);
//
// Destination routing instance is not yet created.
// Or Destination routing instance is deleted Or
// virtual network index is not yet calculated (due missing virtual network
// link)
//
if (dest == NULL || dest->deleted() || !dest->virtual_network_index()) {
// Wait for the creation of RoutingInstance
AddPendingServiceChain(rtinstance);
return false;
}
RoutingInstance *connected_ri = NULL;