/
bgp_peer_membership.cc
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bgp_peer_membership.cc
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/*
* Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
*/
#include "bgp/bgp_peer_membership.h"
#include <boost/assign/list_of.hpp>
#include "base/task_annotations.h"
#include "bgp/bgp_export.h"
#include "bgp/bgp_log.h"
#include "bgp/bgp_peer_types.h"
#include "bgp/bgp_ribout_updates.h"
#include "bgp/bgp_route.h"
#include "bgp/routing-instance/routing_instance.h"
#include "bgp/scheduling_group.h"
using std::vector;
int PeerRibMembershipManager::membership_task_id_ = -1;
const int PeerRibMembershipManager::kMembershipTaskInstanceId;
MembershipRequest::MembershipRequest() {
action_mask = INVALID;
ipeer = NULL;
instance_id = -1;
}
//
// Return BgpTableClose::CloseType enum in string form
//
std::string MembershipRequest::ActionMaskToString(Action action_mask) {
std::ostringstream action_str;
if (action_mask & RIBIN_ADD) {
action_str << "RibInAdd, ";
}
if (action_mask & RIBIN_DELETE) {
action_str << "RibInDelete, ";
}
if (action_mask & RIBIN_STALE) {
action_str << "RibInStale, ";
}
if (action_mask & RIBIN_SWEEP) {
action_str << "RibInSweep, ";
}
if (action_mask & RIBOUT_ADD) {
action_str << "RibOutAdd, ";
}
if (action_mask & RIBOUT_DELETE) {
action_str << "RibOutDelete, ";
}
return action_str.str();
}
//
// Return IPeerRibEvent::EventType enum in string form
//
std::string IPeerRibEvent::EventTypeToString(EventType event_type) {
static const std::map<EventType, std::string> ToString =
boost::assign::map_list_of
(REGISTER_RIB, "RegisterRib")
(REGISTER_RIB_COMPLETE, "RegisterRibComplete")
(UNREGISTER_RIB, "UnregisterRib")
(UNREGISTER_RIB_COMPLETE, "UnregisterRibComplete")
(UNREGISTER_PEER, "UnregisterPeer")
(UNREGISTER_PEER_COMPLETE, "UnregisterPeerComplete");
return ToString.find(event_type)->second;
}
IPeerRib::IPeerRib(
IPeer *ipeer, BgpTable *table, PeerRibMembershipManager *membership_mgr)
: ipeer_(ipeer),
table_(table),
membership_mgr_(membership_mgr),
ribout_(NULL),
table_delete_ref_(this, NULL),
ribin_registered_(false),
ribout_registered_(false),
stale_(false),
instance_id_(-1) {
if (membership_mgr != NULL) {
LifetimeActor *deleter = table ? table->deleter() : NULL;
if (deleter) {
assert(!deleter->IsDeleted());
table_delete_ref_.Reset(deleter);
}
}
}
IPeerRib::~IPeerRib() {
}
//
// Implement operator< for IPeerRib. Compares the names for the underlying
// IPeers, and if they are the same, compares the BgpTable pointers (TODO:
// should we compare the table names instead?
//
bool IPeerRib::operator<(const IPeerRib &rhs) const {
// TBD: revert back to comparing the names returned by ToString()
if (ipeer_ < rhs.ipeer_) return true;
if (ipeer_ > rhs.ipeer_) return false;
if (table_ < rhs.table_) return true;
if (table_ > rhs.table_) return false;
return false;
}
//
// Concurrency: Runs in the context of db-walker launched from the BGP peer
// membership task.
//
// Register RibIn with this IPeerRib. There is nothing much to be done at the
// moment other than to note down that registration has been done
//
void IPeerRib::RegisterRibIn() {
SetRibInRegistered(true);
}
//
// Concurrency: Runs in the context of db-walker launched from the BGP peer
// membership task.
//
// Unregister RibIn from this IPeerRib. There is nothing much to be done at the
// moment other than to note down that unregistration has been done
//
void IPeerRib::UnregisterRibIn() {
}
//
// Concurrency: Runs in the context of db-walker launched from the BGP peer
// membership task.
//
// Check whether RibIn has been registered in this IPeerRib
bool IPeerRib::IsRibInRegistered() {
return ribin_registered_;
}
//
// Concurrency: Runs in the context of db-walker launched from the BGP peer
// membership task.
//
// Set/Reset RibIn registered flag
void IPeerRib::SetRibInRegistered(bool set) {
ribin_registered_ = set;
}
//
// Concurrency: Runs in the context of db-walker launched from the BGP peer
// membership task.
//
// Per prefix based RibIn specific action necessary shall be performed here.
// At the moment, we don't have any thing to do
//
void IPeerRib::RibInJoin(DBTablePartBase *root, DBEntryBase *db_entry,
BgpTable *table,
MembershipRequest::Action action_mask) {
return;
}
//
// Concurrency: Runs in the context of db-walker launched from the BGP peer
// membership task.
//
// Close RibIn of this IPeerRib for a particular prefix. Based on the action
// we may mark the route as stale, sweep the route if it is stale or just
// delete the route altogether.
//
void IPeerRib::RibInLeave(DBTablePartBase *root, DBEntryBase *db_entry,
BgpTable *table,
MembershipRequest::Action action_mask) {
BgpRoute *rt = static_cast<BgpRoute *>(db_entry);
if (!IsRibInRegistered()) return;
ipeer_->peer_close()->close_manager()->
ProcessRibIn(root, rt, table, action_mask);
}
//
// Concurrency: Runs in the context of the BGP peer membership task.
//
// Register the IPeer to the BgpTable. Creates the RibOut itself if needed
// and registers the RibOut as a listener for the BgpTable.
//
// Registers the IPeer to the RibOut. Also joins the IPeer to the UPDATE and
// BULK queues for the RibOutUpdates associated with the RibOut. Finally, post
// a JOIN event to the BGP peer membership task to cause a table walk to get
// kicked off.
//
void IPeerRib::RegisterRibOut(RibExportPolicy policy) {
BgpServer *server = membership_mgr_->server();
SchedulingGroupManager *mgr = server->scheduling_group_manager();
ribout_ = table_->RibOutLocate(mgr, policy);
ribout_->RegisterListener();
ribout_->Register(ipeer_);
int index = ribout_->GetPeerIndex(ipeer_);
RibOutUpdates *updates = ribout_->updates();
SchedulingGroup *group = ribout_->GetSchedulingGroup();
assert(group);
if (updates->QueueJoin(RibOutUpdates::QUPDATE, index))
group->RibOutActive(ribout_, RibOutUpdates::QUPDATE);
if (updates->QueueJoin(RibOutUpdates::QBULK, index))
group->RibOutActive(ribout_, RibOutUpdates::QBULK);
SetRibOutRegistered(true);
}
//
// Concurrency: Runs in the context of the BGP peer membership task.
//
// Unregister the IPeer from the BgpTable. First leave the IPeer from the
// UPDATE and BULK queues for the RibOutUpdates associated with the RibOut.
// Then unregister the IPeer from the RibOut, which may result in deletion
// of the RibOut itself.
//
void IPeerRib::UnregisterRibOut() {
int index = ribout_->GetPeerIndex(ipeer_);
RibOutUpdates *updates = ribout_->updates();
updates->QueueLeave(RibOutUpdates::QUPDATE, index);
updates->QueueLeave(RibOutUpdates::QBULK, index);
ribout_->Unregister(ipeer_);
ribout_ = NULL;
}
//
// Concurrency: Runs in the context of the BGP peer membership task.
//
// Deactivate the IPeer in the RibOut. This ensures that the peer will stop
// exporting routes from now onwards.
//
void IPeerRib::DeactivateRibOut() {
if (IsRibOutRegistered()) {
ribout_->Deactivate(ipeer_);
}
}
bool IPeerRib::IsRibOutRegistered() const {
return ribout_registered_;
}
bool IPeerRib::IsRibOutActive() const {
if (IsRibOutRegistered()) {
return ribout_->IsActive(ipeer_);
} else {
return false;
}
}
//
// Concurrency: Runs in the context of db-walker launched from the BGP peer
// membership task.
//
// Set/Reset RibOut registered flag
void IPeerRib::SetRibOutRegistered(bool set) {
ribout_registered_ = set;
}
//
// Process RibOut creation for a particular prefix
//
// Concurrency: Runs in the context of db-walker launched from the BGP peer
// membership task.
//
void IPeerRib::RibOutJoin(DBTablePartBase *root, DBEntryBase *db_entry,
BgpTable *table,
MembershipRequest::Action action_mask) {
if (!(action_mask & MembershipRequest::RIBOUT_ADD)) {
return;
}
RibPeerSet jmask;
// TODO(ananth): For peers with the same export policy, we could combine
// and launch one BgpExport::Join
jmask.set(ribout_->GetPeerIndex(ipeer_));
ribout_->bgp_export()->Join(root, jmask, db_entry);
}
//
// Process RibOut deletion for a particular prefix
//
// Concurrency: Runs in the context of db-walker launched from the BGP peer
// membership task.
//
void IPeerRib::RibOutLeave(DBTablePartBase *root, DBEntryBase *db_entry,
BgpTable *table,
MembershipRequest::Action action_mask) {
if (!(action_mask & MembershipRequest::RIBOUT_DELETE)) {
return;
}
if (!ribout_registered_) {
return;
}
int index = ribout_->GetPeerIndex(ipeer_);
if (index < 0) {
return;
}
RibPeerSet lmask;
lmask.set(index);
ribout_->bgp_export()->Leave(root, lmask, db_entry);
}
void IPeerRib::ManagedDelete() {
// TODO(ananth): We let IPeerRib to be deleted as part of peer cleanups.
// Once all the IPeerRibs are deleted, table gets deleted automatically.
//
// membership_mgr_->Unregister(ipeer_, table_);
}
//
// Constructor for the PeerMembershipMgr. Create the peer membership task if
// required. Also create a WorkQueue to handle IPeerRibEvents.
//
PeerRibMembershipManager::PeerRibMembershipManager(BgpServer *server) :
server_(server), current_jobs_count_(0), total_jobs_count_(0) {
if (membership_task_id_ == -1) {
TaskScheduler *scheduler = TaskScheduler::GetInstance();
membership_task_id_ = scheduler->GetTaskId("bgp::PeerMembership");
}
event_queue_ = new WorkQueue<IPeerRibEvent *>(
membership_task_id_, kMembershipTaskInstanceId,
boost::bind(&PeerRibMembershipManager::IPeerRibEventCallback, this,
_1));
}
//
// Destructor for PeerMembershipMgr. Delete the WorkQueue of IPeerRibEvents.
//
PeerRibMembershipManager::~PeerRibMembershipManager() {
delete event_queue_;
}
int PeerRibMembershipManager::RegisterPeerRegistrationCallback(
PeerRegistrationCallback callback) {
tbb::mutex::scoped_lock lock(registration_mutex_);
size_t id = registration_bmap_.find_first();
if (id == registration_bmap_.npos) {
id = registration_callbacks_.size();
registration_callbacks_.push_back(callback);
} else {
registration_bmap_.reset(id);
if (registration_bmap_.none()) {
registration_bmap_.clear();
}
registration_callbacks_[id] = callback;
}
return id;
}
void PeerRibMembershipManager::UnregisterPeerRegistrationCallback(int id) {
tbb::mutex::scoped_lock lock(registration_mutex_);
registration_callbacks_[id] = NULL;
if ((size_t) id == registration_callbacks_.size() - 1) {
while (!registration_callbacks_.empty() &&
registration_callbacks_.back() == NULL) {
registration_callbacks_.pop_back();
}
if (registration_bmap_.size() > registration_callbacks_.size()) {
registration_bmap_.resize(registration_callbacks_.size());
}
} else {
if ((size_t) id >= registration_bmap_.size()) {
registration_bmap_.resize(id + 1);
}
registration_bmap_.set(id);
}
}
void PeerRibMembershipManager::NotifyPeerRegistration(IPeer *ipeer,
BgpTable *table, bool unregister) {
tbb::mutex::scoped_lock lock(registration_mutex_);
if (!ipeer->IsXmppPeer())
return;
for (PeerRegistrationListenerList::iterator iter =
registration_callbacks_.begin();
iter != registration_callbacks_.end(); ++iter) {
if (*iter != NULL) {
PeerRegistrationCallback callback = *iter;
(callback)(ipeer, table, unregister);
}
}
}
//
// Concurrency: Runs in the context of the BGP peer membership task.
//
// Start the process to join the Ipeer to the BgpTable. This consists mainly
// of starting a table walk so that all existing routes can be advertised to
// the IPeer.
//
// Assumes that the IPeer is already registered with the BgpTable.
//
void PeerRibMembershipManager::Join(BgpTable *table,
MembershipRequestList *request_list) {
DB *db = table->database();
DBTableWalker *walker = db->GetWalker();
walker->WalkTable(table, NULL,
// _1: DBTablePartition, _2: DBEntry
boost::bind(&PeerRibMembershipManager::RouteJoin, this, _1, _2, table,
request_list),
// _1: DBTablePartition
boost::bind(&PeerRibMembershipManager::JoinDone, this, _1,
request_list));
}
//
// Concurrency: Runs in the context of the db walker task triggered from
// BGP peer membership task.
//
// Handle RibIna and RibOut join for a particular prefix to a set of peers
//
bool PeerRibMembershipManager::RouteJoin(DBTablePartBase *root,
DBEntryBase *db_entry, BgpTable *table,
MembershipRequestList *request_list) {
// Iterate through each of the peers in the request list and process RibIn
// and RibOut for this peer
//
// TODO(ananth): RibOut can be aggregated into a single call for all peers
// with the same export policy
for (MembershipRequestList::iterator iter = request_list->begin();
iter != request_list->end(); iter++) {
MembershipRequest *request = iter.operator->();
IPeerRib *peer_rib = IPeerRibFind(request->ipeer, table);
if (peer_rib) {
peer_rib->RibInJoin(root, db_entry, table, request->action_mask);
peer_rib->RibOutJoin(root, db_entry, table, request->action_mask);
}
}
return true;
}
//
// Concurrency: Runs in the context of the DB partition task.
//
// Process the table walk done notification from the DB infrastructure. This
// table walk was started from the Join method.
//
void PeerRibMembershipManager::JoinDone(DBTableBase *db,
MembershipRequestList *request_list) {
BgpTable *table = static_cast<BgpTable *>(db);
IPeerRibEvent *event =
new IPeerRibEvent(IPeerRibEvent::REGISTER_RIB_COMPLETE, NULL, table,
request_list);
Enqueue(event);
}
//
// Concurrency: Runs in the context of the BGP peer membership task.
//
// Kick off the process to unregister the IPeer from the BgpTable. We first
// need to do a table walk and clean up state for all routes from the IPeer.
// We can actually unregister only after the state has been cleaned up.
//
// In the meantime, we deactivate the IPeer in the RibOut to ensure that it
// does not export any more routes.
//
void PeerRibMembershipManager::Leave(BgpTable *table,
MembershipRequestList *request_list) {
DB *db = table->database();
for (MembershipRequestList::iterator iter = request_list->begin();
iter != request_list->end(); iter++) {
MembershipRequest *request = iter.operator->();
if (!(request->action_mask & MembershipRequest::RIBOUT_DELETE)) {
continue;
}
IPeerRib *peer_rib = IPeerRibFind(request->ipeer, table);
if (peer_rib) {
// Ignore peer ribs which are already in close process
if (peer_rib->IsRibOutActive()) peer_rib->DeactivateRibOut();
}
}
DBTableWalker *walker = db->GetWalker();
walker->WalkTable(table, NULL,
// _1: DBTablePartBase, _2: DBEntry
boost::bind(&PeerRibMembershipManager::RouteLeave, this, _1, _2, table,
request_list),
// _1: DBTableBase
boost::bind(&PeerRibMembershipManager::LeaveDone, this, _1,
request_list));
}
//
// Concurrency: Runs in the context of the db walker task triggered from
// BGP peer membership task.
//
// Leave the route from RibIn and from RibOut
//
bool PeerRibMembershipManager::RouteLeave(DBTablePartBase *root,
DBEntryBase *db_entry,
BgpTable *table,
MembershipRequestList *request_list) {
for (MembershipRequestList::iterator iter = request_list->begin();
iter != request_list->end(); iter++) {
MembershipRequest *request = iter.operator->();
IPeerRib *peer_rib = IPeerRibFind(request->ipeer, table);
if (peer_rib == NULL) {
continue;
}
peer_rib->RibOutLeave(root, db_entry, table, request->action_mask);
peer_rib->RibInLeave(root, db_entry, table, request->action_mask);
}
return true;
}
void PeerRibMembershipManager::MembershipRequestListDebug(
const char *function, int line, BgpTable *table,
MembershipRequestList *request_list) {
std::ostringstream ostream;
ostream << "";
for (MembershipRequestList::iterator iter = (request_list)->begin();
iter != (request_list)->end(); iter++) {
MembershipRequest *request = iter.operator->();
ostream << request->ipeer->ToString() << ", ";
}
}
//
// Concurrency: Runs in the context of the DB partition task.
//
// Process the table walk done notification from the DB infrastructure. This
// walk was started from the Leave method. Since the table walk is complete,
// we can post an IPeerRib UNREGISTER_RIB event for the BGP peer membership
// task.
//
void PeerRibMembershipManager::LeaveDone(DBTableBase *db,
MembershipRequestList *request_list) {
BgpTable *table = static_cast<BgpTable *>(db);
IPeerRibEvent *event =
new IPeerRibEvent(IPeerRibEvent::UNREGISTER_RIB_COMPLETE, NULL, table,
request_list);
Enqueue(event);
}
//
// Process Register/Unregister request for a peer with a particular rib
//
IPeerRibEvent *PeerRibMembershipManager::ProcessRequest(
IPeerRibEvent::EventType event_type, BgpTable *table,
const MembershipRequest &request) {
TableMembershipRequestMap *request_map;
if (event_type == IPeerRibEvent::REGISTER_RIB) {
request_map = ®ister_request_map_;
} else {
request_map = &unregister_request_map_;
}
//
// Check whether a request in this table is still pending to be processed.
// If so, just append this new request to the list of pending requests
//
// All such requests will be collected and handled in one db walk
//
TableMembershipRequestMap::iterator it = request_map->find(table);
// Check if there is already a pending task. If so, just append this
// peer to the list
if (it != request_map->end()) {
// A similar request for other peers is pending in this table.
MembershipRequestList *request_list = it->second;
if (!request_list) {
it->second = request_list = new MembershipRequestList();
}
for (MembershipRequestList::iterator rqiter = request_list->begin();
rqiter != request_list->end(); ++rqiter) {
if (rqiter->ipeer == request.ipeer &&
rqiter->action_mask == request.action_mask) {
return NULL;
}
}
request_list->push_back(request);
return NULL;
}
// Create a new list, and enqueue an event with this peer list
MembershipRequestList *request_list = new MembershipRequestList();
request_list->push_back(request);
request_map->insert(std::make_pair(table, request_list));
IPeerRibEvent *event = new IPeerRibEvent(event_type, NULL, table);
event->request_list = request_list;
return event;
}
//
// Concurrency: Runs in the context of the BGP state machine task.
//
// Register the IPeer to the BgpTable. We post a REGISTER_RIB event to the BGP
// peer membership task to deal with concurrency issues.
//
void PeerRibMembershipManager::Register(
IPeer *ipeer, BgpTable *table, const RibExportPolicy &policy,
int instance_id, NotifyCompletionFn notify_completion_fn) {
MembershipRequest request;
request.ipeer = ipeer;
request.action_mask = static_cast<MembershipRequest::Action>(
MembershipRequest::RIBIN_ADD | MembershipRequest::RIBOUT_ADD);
request.instance_id = instance_id;
request.policy = policy;
request.notify_completion_fn = notify_completion_fn;
current_jobs_count_++;
total_jobs_count_++;
tbb::mutex::scoped_lock lock(mutex_);
IPeerRibEvent *event = ProcessRequest(IPeerRibEvent::REGISTER_RIB, table,
request);
if (event) {
Enqueue(event);
}
}
//
// Concurrency: Runs in the context of the BGP state machine task.
//
// Synchronously register the IPeer to the BgpTable for RIBIN_ADD.
//
void PeerRibMembershipManager::RegisterRibIn(IPeer *ipeer, BgpTable *table) {
tbb::mutex::scoped_lock lock(mutex_);
IPeerRib *peer_rib = IPeerRibLocate(ipeer, table);
peer_rib->RegisterRibIn();
BGP_LOG_PEER_TABLE(peer_rib->ipeer(), SandeshLevel::SYS_DEBUG,
BGP_LOG_FLAG_SYSLOG, peer_rib->table(),
"Register routing-table for " <<
MembershipRequest::ActionMaskToString(MembershipRequest::RIBIN_ADD));
}
//
// Concurrency: Runs in the context of the BGP state machine task.
//
// Unregister the IPeer from the BgpTable. We first post a LEAVE event to
// the BGP peer membership task, which will start a table walk. Once that's
// done we will post a UNREGISTER_RIB event to the BGP peer membership task.
//
void PeerRibMembershipManager::Unregister(IPeer *ipeer, BgpTable *table,
MembershipRequest::NotifyCompletionFn
notify_completion_fn) {
MembershipRequest request;
request.ipeer = ipeer;
request.action_mask = static_cast<MembershipRequest::Action>(
MembershipRequest::RIBIN_DELETE | MembershipRequest::RIBOUT_DELETE);
request.notify_completion_fn = notify_completion_fn;
current_jobs_count_++;
total_jobs_count_++;
tbb::mutex::scoped_lock lock(mutex_);
IPeerRibEvent *event = ProcessRequest(IPeerRibEvent::UNREGISTER_RIB,
table, request);
if (event) {
Enqueue(event);
}
}
//
// Concurrency: Runs in the context of the BGP state machine task.
//
// Unregister request for an ipeer from all the ribs it has registered to.
//
// Enqueue a request to peer rib membership manager
//
void PeerRibMembershipManager::UnregisterPeer(IPeer *ipeer,
MembershipRequest::ActionGetFn action_get_fn,
MembershipRequest::NotifyCompletionFn notify_completion_fn) {
IPeerRibEvent *event = new IPeerRibEvent(IPeerRibEvent::UNREGISTER_PEER,
ipeer, NULL);
current_jobs_count_++;
total_jobs_count_++;
event->request.action_get_fn = action_get_fn;
event->request.notify_completion_fn = notify_completion_fn;
Enqueue(event);
}
//
// Concurrency: Runs in the context of the BGP peer membership task.
//
// Callback where in we can start unregistering a peer from all of its ribs
//
void PeerRibMembershipManager::UnregisterPeerCallback(IPeerRibEvent *event) {
CHECK_CONCURRENCY("bgp::PeerMembership");
PeerRibMap::const_iterator it;
int *count = NULL;
// Walk the set and find all the ribs this peer has registered to.
// Unregister the peer from each of those ribs
for (it = peer_rib_map_.find(event->ipeer); it != peer_rib_map_.end();
it++) {
if (it->first != event->ipeer) break;
IPeerRib *peer_rib = it->second;
// We need to track the completion of each of these rib close process
// before we can inform the requester that unregistration is complete
//
// Use a simple counter to manage this part
if (!count) count = new int(0);
++*count;
MembershipRequest request;
request.ipeer = event->ipeer;
request.action_mask = static_cast<MembershipRequest::Action>(
event->request.action_get_fn(peer_rib));
request.notify_completion_fn = boost::bind(
&PeerRibMembershipManager::UnregisterPeerDone,
this, _1, _2, count, event->request.notify_completion_fn);
current_jobs_count_++;
total_jobs_count_++;
IPeerRibEvent *process_event;
process_event = ProcessRequest(IPeerRibEvent::UNREGISTER_RIB,
peer_rib->table(), request);
//
// We are already running in membership task. Invoke the callback
// right away. This is required also to serialize rib membership
// requests. Unregister peer request should not get mangled with other
// explicit register/unregister requests
//
if (process_event) {
IPeerRibEventCallbackUnlocked(process_event);
}
}
//
// If there are no peer_ribs to unregister, notify completion right away
//
if (!count) {
event->request.notify_completion_fn(event->ipeer, NULL);
}
}
//
// Concurrency: Runs in the context of the BGP peer membership task.
//
// Unregister for a peer against a particular rib is complete
//
void PeerRibMembershipManager::UnregisterPeerDone(
IPeer *ipeer, BgpTable *table, int *count,
MembershipRequest::NotifyCompletionFn notify_completion_fn) {
// If there are other rib closes pending, wait
if (--*count) return;
delete count;
// Enqueue a notification to signal the requestor that unregistration
// of this peer is complete
IPeerRibEvent *event = new IPeerRibEvent(
IPeerRibEvent::UNREGISTER_PEER_COMPLETE, ipeer, NULL);
event->ipeer = ipeer;
event->table = NULL;
event->request.notify_completion_fn = notify_completion_fn;
current_jobs_count_++;
total_jobs_count_++;
Enqueue(event);
}
//
// Concurrency: Runs in the context of the BGP peer membership task.
//
// All ribs unregistration for the peer is complete
//
void PeerRibMembershipManager::UnregisterPeerCompleteCallback(
IPeerRibEvent *event) {
// Inform the requestor (PeerCloseManager) that this process is complete
current_jobs_count_--;
event->request.notify_completion_fn(event->ipeer, NULL);
}
void PeerRibMembershipManager::FillRoutingInstanceTableInfo(
ShowRoutingInstanceTable *srit, const BgpTable *table) const {
std::vector<std::string> peers;
for (RibPeerMap::const_iterator it = rib_peer_map_.find(table);
it != rib_peer_map_.end(); ++it) {
if (it->first != table)
break;
peers.push_back(it->second->ToString());
}
if (peers.size())
srit->set_peers(peers);
}
//
// Find the IPeerRib corresponding to the given IPeer and BgpTable.
//
IPeerRib *PeerRibMembershipManager::IPeerRibFind(IPeer *ipeer,
BgpTable *table) {
IPeerRib peer_rib(ipeer, table, NULL);
PeerRibSet::iterator iter = peer_rib_set_.find(&peer_rib);
return (iter != peer_rib_set_.end() ? *iter : NULL);
}
//
// Find the IPeerRib corresponding to the given IPeer and BgpTable.
// Const version.
//
const IPeerRib *PeerRibMembershipManager::IPeerRibFind(IPeer *ipeer,
BgpTable *table) const {
IPeerRib peer_rib(ipeer, table, NULL);
PeerRibSet::const_iterator iter = peer_rib_set_.find(&peer_rib);
return (iter != peer_rib_set_.end() ? *iter : NULL);
}
//
// Find or create the IPeerRib corresponding to the given IPeer and BgpTable.
//
IPeerRib *PeerRibMembershipManager::IPeerRibLocate(IPeer *ipeer,
BgpTable *table) {
IPeerRib *peer_rib = IPeerRibFind(ipeer, table);
return (peer_rib ? peer_rib : IPeerRibInsert(ipeer, table));
}
//
// Return the instance-id of the IPeer for the BgpTable.
//
int PeerRibMembershipManager::GetRegistrationId(const IPeer *ipeer,
const BgpTable *table) const {
assert(ipeer->IsXmppPeer());
const IPeerRib *peer_rib = IPeerRibFind(
const_cast<IPeer *>(ipeer), const_cast<BgpTable *>(table));
return (peer_rib ? peer_rib->instance_id() : -1);
}
void PeerRibMembershipManager::FillPeerMembershipInfo(const IPeer *peer,
BgpNeighborResp *resp) const {
assert(resp->get_routing_tables().size() == 0);
IPeer *nc_peer = const_cast<IPeer *>(peer);
const SchedulingGroupManager *sg_mgr = server_->scheduling_group_manager();
const SchedulingGroup *sg = sg_mgr->PeerGroup(nc_peer);
if (sg) {
resp->set_send_state(
sg->PeerInSync(nc_peer) ? "in sync" : "not in sync");
} else {
resp->set_send_state("not advertising");
}
IPeerRib peer_rib(
nc_peer, NULL, const_cast<PeerRibMembershipManager *>(this));
vector<BgpNeighborRoutingTable> table_list;
for (PeerRibMembershipManager::PeerRibSet::const_iterator it =
peer_rib_set_.lower_bound(&peer_rib);
it != peer_rib_set_.end(); ++it) {
if ((*it)->ipeer() != peer)
break;
BgpNeighborRoutingTable table;
table.set_name((*it)->table()->name());
table.set_current_state("subscribed");
table_list.push_back(table);
}
resp->set_routing_tables(table_list);
}
void PeerRibMembershipManager::FillRegisteredTable(const IPeer *peer,
std::vector<std::string> *list) {
IPeer *nc_peer = const_cast<IPeer *>(peer);
IPeerRib peer_rib(nc_peer, NULL, this);
PeerRibMembershipManager::PeerRibSet::iterator it =
peer_rib_set_.lower_bound(&peer_rib);
for (; it != peer_rib_set_.end(); it++) {
if ((*it)->ipeer() != nc_peer) break;
list->push_back((*it)->table()->name());
}
}
//
// Insert the IPeerRib into the set.
//
IPeerRib *PeerRibMembershipManager::IPeerRibInsert(IPeer *ipeer,
BgpTable *table) {
IPeerRib *peer_rib = new IPeerRib(ipeer, table, this);
rib_peer_map_.insert(std::make_pair(table, ipeer));
peer_rib_map_.insert(std::make_pair(ipeer, peer_rib));
peer_rib_set_.insert(peer_rib);
NotifyPeerRegistration(ipeer, table, false);
return peer_rib;
}
//
// Remove the IPeerRib from the set.
//
void PeerRibMembershipManager::IPeerRibRemove(IPeerRib *peer_rib) {
NotifyPeerRegistration(peer_rib->ipeer(), peer_rib->table(), true);
peer_rib_set_.erase(peer_rib);
for (RibPeerMap::iterator it = rib_peer_map_.find(peer_rib->table());
it != rib_peer_map_.end(); it++) {
if (it->first != peer_rib->table())
break;
if (it->second == peer_rib->ipeer()) {
rib_peer_map_.erase(it);
break;
}
}
for (PeerRibMap::iterator it2 = peer_rib_map_.find(peer_rib->ipeer());
it2 != peer_rib_map_.end(); it2++) {
if (it2->first != peer_rib->ipeer())
break;
if (it2->second == peer_rib) {
peer_rib_map_.erase(it2);
break;
}
}
}
//
// Notify completion of a peer membership manager work request to the caller
//
void PeerRibMembershipManager::NotifyCompletion(BgpTable *table,
MembershipRequestList *request_list) {
// We batch multiple requests and process them together in a single db
// walk. Iterate through each request and notify the party appropriately
for (MembershipRequestList::iterator iter =
request_list->begin(); iter != request_list->end(); iter++) {
MembershipRequest *request = iter.operator->();
current_jobs_count_--;
if (request->notify_completion_fn) {
request->notify_completion_fn(request->ipeer, table);
}
}
}
//
// Concurrency: Runs in the context of the BGP peer membership task.
//
// Process REGISTER_RIB event
//
void PeerRibMembershipManager::ProcessRegisterRibEvent(BgpTable *table,
MembershipRequestList *request_list) {
// Notify completion right away if the table is marked for deletion
if (table->IsDeleted()) {
NotifyCompletion(table, request_list);
delete request_list;
register_request_map_.erase(table);
return;
}
//
// Iterate through each request and prepare for walk
//
for (MembershipRequestList::iterator iter =
request_list->begin(); iter != request_list->end(); iter++) {
MembershipRequest *request = iter.operator->();
IPeerRib *peer_rib = IPeerRibFind(request->ipeer, table);
assert(request->action_mask != MembershipRequest::INVALID);
if (!peer_rib) {
peer_rib = IPeerRibInsert(request->ipeer, table);
if (request->instance_id > 0) {
peer_rib->set_instance_id(request->instance_id);
}
}
//
// Peer has registered to this table. Reset the stale flag
//
if (peer_rib->IsStale()) {
peer_rib->ResetStale();
}
BGP_LOG_PEER_TABLE(peer_rib->ipeer(), SandeshLevel::SYS_DEBUG,
BGP_LOG_FLAG_SYSLOG, peer_rib->table(),
"Register routing-table for " <<
MembershipRequest::ActionMaskToString(
request->action_mask));
//
// Register RibOut if requested
//