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flow_mgmt.cc
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flow_mgmt.cc
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#include <bitset>
#include "pkt/flow_mgmt.h"
#include "pkt/flow_mgmt_request.h"
#include "pkt/flow_mgmt_response.h"
#include "pkt/flow_mgmt_dbclient.h"
const string FlowMgmtManager::kFlowMgmtTask = "Flow::Management";
/////////////////////////////////////////////////////////////////////////////
// FlowMgmtManager methods
/////////////////////////////////////////////////////////////////////////////
FlowMgmtManager::FlowMgmtManager(Agent *agent, FlowTable *flow_table) :
agent_(agent),
flow_table_(flow_table),
acl_flow_mgmt_tree_(this),
ace_id_flow_mgmt_tree_(this),
interface_flow_mgmt_tree_(this),
vn_flow_mgmt_tree_(this),
ip4_route_flow_mgmt_tree_(this),
ip6_route_flow_mgmt_tree_(this),
bridge_route_flow_mgmt_tree_(this),
vrf_flow_mgmt_tree_(this),
nh_flow_mgmt_tree_(this),
flow_mgmt_dbclient_(new FlowMgmtDbClient(agent, this)),
request_queue_(agent_->task_scheduler()->GetTaskId(kFlowMgmtTask), 1,
boost::bind(&FlowMgmtManager::RequestHandler, this, _1)),
response_queue_(agent_->task_scheduler()->GetTaskId(FlowTable::TaskName()),
1, boost::bind(&FlowMgmtManager::ResponseHandler, this,
_1)) {
}
void FlowMgmtManager::Init() {
flow_mgmt_dbclient_->Init();
agent_->acl_table()->set_ace_flow_sandesh_data_cb
(boost::bind(&FlowMgmtManager::SetAceSandeshData, this, _1, _2, _3));
agent_->acl_table()->set_acl_flow_sandesh_data_cb
(boost::bind(&FlowMgmtManager::SetAclFlowSandeshData, this, _1, _2,
_3));
}
void FlowMgmtManager::Shutdown() {
request_queue_.Shutdown();
response_queue_.Shutdown();
flow_mgmt_dbclient_->Shutdown();
}
/////////////////////////////////////////////////////////////////////////////
// Introspect routines
/////////////////////////////////////////////////////////////////////////////
string FlowMgmtManager::GetAceSandeshDataKey(const AclDBEntry *acl,
int ace_id) {
string uuid_str = UuidToString(acl->GetUuid());
stringstream ss;
ss << uuid_str << ":";
ss << ace_id;
return ss.str();
}
void FlowMgmtManager::SetAceSandeshData(const AclDBEntry *acl,
AclFlowCountResp &data,
int ace_id) {
}
void FlowMgmtManager::SetAclFlowSandeshData(const AclDBEntry *acl,
AclFlowResp &data,
const int last_count) {
}
/////////////////////////////////////////////////////////////////////////////
// Utility methods to enqueue events into work-queue
/////////////////////////////////////////////////////////////////////////////
void FlowMgmtManager::AddEvent(FlowEntry *flow) {
FlowEntryPtr flow_ptr(flow);
boost::shared_ptr<FlowMgmtRequest>
req(new FlowMgmtRequest(FlowMgmtRequest::ADD_FLOW, flow_ptr));
request_queue_.Enqueue(req);
}
void FlowMgmtManager::ExportEvent(FlowEntry *flow, uint64_t diff_bytes,
uint64_t diff_pkts) {
FlowEntryPtr flow_ptr(flow);
boost::shared_ptr<FlowMgmtRequest>
req(new FlowMgmtRequest(FlowMgmtRequest::EXPORT_FLOW, flow_ptr,
diff_bytes, diff_pkts));
request_queue_.Enqueue(req);
}
void FlowMgmtManager::DeleteEvent(FlowEntry *flow) {
FlowEntryPtr flow_ptr(flow);
boost::shared_ptr<FlowMgmtRequest>
req(new FlowMgmtRequest(FlowMgmtRequest::DELETE_FLOW, flow_ptr));
request_queue_.Enqueue(req);
}
void FlowMgmtManager::AddEvent(const DBEntry *entry, uint32_t gen_id) {
boost::shared_ptr<FlowMgmtRequest>
req(new FlowMgmtRequest(FlowMgmtRequest::ADD_DBENTRY, entry, gen_id));
request_queue_.Enqueue(req);
}
void FlowMgmtManager::ChangeEvent(const DBEntry *entry, uint32_t gen_id) {
boost::shared_ptr<FlowMgmtRequest>
req(new FlowMgmtRequest(FlowMgmtRequest::CHANGE_DBENTRY, entry,
gen_id));
request_queue_.Enqueue(req);
}
void FlowMgmtManager::DeleteEvent(const DBEntry *entry, uint32_t gen_id) {
boost::shared_ptr<FlowMgmtRequest>req
(new FlowMgmtRequest(FlowMgmtRequest::DELETE_DBENTRY, entry, gen_id));
request_queue_.Enqueue(req);
}
void FlowMgmtManager::RetryVrfDeleteEvent(const VrfEntry *vrf) {
boost::shared_ptr<FlowMgmtRequest>
req(new FlowMgmtRequest(FlowMgmtRequest::RETRY_DELETE_VRF, vrf, 0));
request_queue_.Enqueue(req);
}
/////////////////////////////////////////////////////////////////////////////
// Handlers for events from the work-queue
/////////////////////////////////////////////////////////////////////////////
static bool ProcessEvent(FlowMgmtRequest *req, FlowMgmtKey *key,
FlowMgmtTree *tree) {
switch (req->event()) {
case FlowMgmtRequest::ADD_DBENTRY:
tree->OperEntryAdd(req, key);
break;
case FlowMgmtRequest::CHANGE_DBENTRY:
tree->OperEntryChange(req, key);
break;
case FlowMgmtRequest::DELETE_DBENTRY:
tree->OperEntryDelete(req, key);
break;
default:
assert(0);
break;
}
return true;
}
bool FlowMgmtManager::DBEntryRequestHandler(FlowMgmtRequest *req,
const DBEntry *entry) {
const Interface *intf = dynamic_cast<const Interface *>(entry);
if (intf) {
InterfaceFlowMgmtKey key(intf);
return ProcessEvent(req, &key, &interface_flow_mgmt_tree_);
}
const VnEntry *vn = dynamic_cast<const VnEntry *>(entry);
if (vn) {
VnFlowMgmtKey key(vn);
return ProcessEvent(req, &key, &vn_flow_mgmt_tree_);
}
const AclDBEntry *acl = dynamic_cast<const AclDBEntry *>(entry);
if (acl) {
AclFlowMgmtKey key(acl);
return ProcessEvent(req, &key, &acl_flow_mgmt_tree_);
}
const NextHop *nh = dynamic_cast<const NextHop *>(entry);
if (nh) {
NhFlowMgmtKey key(static_cast<const NextHop *>(req->db_entry()));
return ProcessEvent(req, &key, &nh_flow_mgmt_tree_);
}
const InetUnicastRouteEntry *inet_uc_rt =
dynamic_cast<const InetUnicastRouteEntry *>(entry);
if (inet_uc_rt) {
InetRouteFlowMgmtKey key(inet_uc_rt);
if (inet_uc_rt->addr().is_v4()) {
return ProcessEvent(req, &key, &ip4_route_flow_mgmt_tree_);
}
if (inet_uc_rt->addr().is_v6()) {
return ProcessEvent(req, &key, &ip6_route_flow_mgmt_tree_);
}
}
const BridgeRouteEntry *bridge =
dynamic_cast<const BridgeRouteEntry *>(entry);
if (bridge) {
BridgeRouteFlowMgmtKey key(bridge);
return ProcessEvent(req, &key, &bridge_route_flow_mgmt_tree_);
}
const VrfEntry *vrf = dynamic_cast<const VrfEntry *>(entry);
if (vrf) {
VrfFlowMgmtKey key(vrf);
return ProcessEvent(req, &key, &vrf_flow_mgmt_tree_);
}
assert(0);
return true;
}
bool FlowMgmtManager::RequestHandler(boost::shared_ptr<FlowMgmtRequest> req) {
switch (req->event()) {
case FlowMgmtRequest::ADD_FLOW: {
AddFlow(req->flow());
break;
}
case FlowMgmtRequest::DELETE_FLOW: {
DeleteFlow(req->flow());
// On return from here reference to the flow is removed which can
// result in deletion of flow from the tree. But, flow management runs
// in parallel to flow processing. As a result, it can result in tree
// being modified by two threads. Avoid the concurrency issue by
// enqueuing a dummy request to flow-table queue. The reference will
// be removed in flow processing context
FlowMgmtResponse flow_resp(FlowMgmtResponse::FREE_FLOW_REF,
req->flow().get(), NULL);
ResponseEnqueue(flow_resp);
break;
}
case FlowMgmtRequest::ADD_DBENTRY:
case FlowMgmtRequest::CHANGE_DBENTRY:
case FlowMgmtRequest::DELETE_DBENTRY: {
DBEntryRequestHandler(req.get(), req->db_entry());
break;
}
case FlowMgmtRequest::RETRY_DELETE_VRF: {
RetryVrfDelete(req->vrf_id());
break;
}
case FlowMgmtRequest::EXPORT_FLOW: {
ExportFlow(req->flow(), req->diff_bytes(), req->diff_packets());
break;
}
default:
assert(0);
}
return true;
}
void FlowMgmtManager::RetryVrfDelete(uint32_t vrf_id) {
vrf_flow_mgmt_tree_.RetryDelete(vrf_id);
}
bool FlowMgmtManager::SetUnderlayPort(FlowEntry *flow, FlowDataIpv4 &s_flow) {
uint16_t underlay_src_port = 0;
bool exported = false;
if (flow->is_flags_set(FlowEntry::LocalFlow)) {
/* Set source_port as 0 for local flows. Source port is calculated by
* vrouter irrespective of whether flow is local or not. So for local
* flows we need to ignore port given by vrouter
*/
s_flow.set_underlay_source_port(0);
exported = true;
} else {
if (flow->tunnel_type().GetType() != TunnelType::MPLS_GRE) {
underlay_src_port = flow->underlay_source_port();
if (underlay_src_port) {
exported = true;
}
} else {
exported = true;
}
s_flow.set_underlay_source_port(underlay_src_port);
}
flow->set_underlay_sport_exported(exported);
return exported;
}
void FlowMgmtManager::SetUnderlayInfo(FlowEntry *flow, FlowDataIpv4 &s_flow) {
string rid = agent_->router_id().to_string();
uint16_t underlay_src_port = 0;
if (flow->is_flags_set(FlowEntry::LocalFlow)) {
s_flow.set_vrouter_ip(rid);
s_flow.set_other_vrouter_ip(rid);
/* Set source_port as 0 for local flows. Source port is calculated by
* vrouter irrespective of whether flow is local or not. So for local
* flows we need to ignore port given by vrouter
*/
s_flow.set_underlay_source_port(0);
flow->set_underlay_sport_exported(true);
} else {
s_flow.set_vrouter_ip(rid);
s_flow.set_other_vrouter_ip(flow->peer_vrouter());
if (flow->tunnel_type().GetType() != TunnelType::MPLS_GRE) {
underlay_src_port = flow->underlay_source_port();
if (underlay_src_port) {
flow->set_underlay_sport_exported(true);
}
} else {
flow->set_underlay_sport_exported(true);
}
s_flow.set_underlay_source_port(underlay_src_port);
}
s_flow.set_underlay_proto(flow->tunnel_type().GetType());
}
/* For ingress flows, change the SIP as Nat-IP instead of Native IP */
void FlowMgmtManager::SourceIpOverride(FlowEntry *flow, FlowDataIpv4 &s_flow) {
FlowEntry *rev_flow = flow->reverse_flow_entry();
if (flow->is_flags_set(FlowEntry::NatFlow) && s_flow.get_direction_ing() &&
rev_flow) {
const FlowKey *nat_key = &rev_flow->key();
if (flow->key().src_addr != nat_key->dst_addr) {
// TODO: IPV6
if (flow->key().family == Address::INET) {
s_flow.set_sourceip(nat_key->dst_addr.to_v4().to_ulong());
} else {
s_flow.set_sourceip(0);
}
}
}
}
void FlowMgmtManager::GetFlowSandeshActionParams(const FlowAction &action_info,
std::string &action_str) {
std::bitset<32> bs(action_info.action);
for (unsigned int i = 0; i <= bs.size(); i++) {
if (bs[i]) {
if (!action_str.empty()) {
action_str += "|";
}
action_str += TrafficAction::ActionToString(
static_cast<TrafficAction::Action>(i));
}
}
}
void FlowMgmtManager::DispatchFlowMsg(SandeshLevel::type level,
FlowDataIpv4 &flow) {
FLOW_DATA_IPV4_OBJECT_LOG("", level, flow);
}
void FlowMgmtManager::ExportFlow(FlowEntryPtr &fe, uint64_t diff_bytes,
uint64_t diff_pkts) {
FlowEntry *flow = fe.get();
tbb::mutex::scoped_lock mutex(flow->mutex());
FlowMgmtManager::FlowEntryInfo *info = FindFlowEntryInfo(fe);
if (info == NULL) {
return;
}
if ((diff_bytes == 0) && info->stats_exported_) {
return;
}
FlowDataIpv4 s_flow;
SandeshLevel::type level = SandeshLevel::SYS_DEBUG;
const FlowStats &stats = flow->stats();
s_flow.set_flowuuid(to_string(flow->flow_uuid()));
s_flow.set_bytes(stats.bytes);
s_flow.set_packets(stats.packets);
s_flow.set_diff_bytes(diff_bytes);
s_flow.set_diff_packets(diff_pkts);
// TODO: IPV6
if (flow->key().family == Address::INET) {
s_flow.set_sourceip(flow->key().src_addr.to_v4().to_ulong());
s_flow.set_destip(flow->key().dst_addr.to_v4().to_ulong());
} else {
s_flow.set_sourceip(0);
s_flow.set_destip(0);
}
s_flow.set_protocol(flow->key().protocol);
s_flow.set_sport(flow->key().src_port);
s_flow.set_dport(flow->key().dst_port);
s_flow.set_sourcevn(flow->data().source_vn);
s_flow.set_destvn(flow->data().dest_vn);
if (stats.intf_in != Interface::kInvalidIndex) {
Interface *intf = InterfaceTable::GetInstance()->FindInterface(stats.intf_in);
if (intf && intf->type() == Interface::VM_INTERFACE) {
VmInterface *vm_port = static_cast<VmInterface *>(intf);
const VmEntry *vm = vm_port->vm();
if (vm) {
s_flow.set_vm(vm->GetCfgName());
}
}
}
s_flow.set_sg_rule_uuid(flow->sg_rule_uuid());
s_flow.set_nw_ace_uuid(flow->nw_ace_uuid());
FlowEntry *rev_flow = flow->reverse_flow_entry();
if (rev_flow) {
s_flow.set_reverse_uuid(to_string(rev_flow->flow_uuid()));
}
// Flow setup(first) and teardown(last) messages are sent with higher
// priority.
if (!info->stats_exported_) {
s_flow.set_setup_time(stats.setup_time);
// Set flow action
std::string action_str;
GetFlowSandeshActionParams(flow->match_p().action_info, action_str);
s_flow.set_action(action_str);
info->stats_exported_ = true;
level = SandeshLevel::SYS_ERR;
SetUnderlayInfo(flow, s_flow);
} else {
/* When the flow is being exported for first time, underlay port
* info is set as part of SetUnderlayInfo. At this point it is possible
* that port is not yet populated to flow-entry because of either
* (i) flow-entry has not got chance to be evaluated by
* flow-stats-collector
* (ii) there is no flow entry in vrouter yet
* (iii) the flow entry in vrouter does not have underlay source port
* populated yet
*/
if (!flow->underlay_sport_exported()) {
if (SetUnderlayPort(flow, s_flow)) {
level = SandeshLevel::SYS_ERR;
}
}
}
if (stats.teardown_time) {
s_flow.set_teardown_time(stats.teardown_time);
//Teardown time will be set in flow only when flow is deleted.
//We need to reset the exported flag when flow is getting deleted to
//handle flow entry reuse case (Flow add request coming for flows
//marked as deleted)
info->stats_exported_ = false;
flow->set_underlay_sport_exported(false);
level = SandeshLevel::SYS_ERR;
}
if (flow->is_flags_set(FlowEntry::LocalFlow)) {
/* For local flows we need to send two flow log messages.
* 1. With direction as ingress
* 2. With direction as egress
* For local flows we have already sent flow log above with
* direction as ingress. We are sending flow log below with
* direction as egress.
*/
s_flow.set_direction_ing(1);
SourceIpOverride(flow, s_flow);
DispatchFlowMsg(level, s_flow);
s_flow.set_direction_ing(0);
//Export local flow of egress direction with a different UUID even when
//the flow is same. Required for analytics module to query flows
//irrespective of direction.
s_flow.set_flowuuid(to_string(flow->egress_uuid()));
DispatchFlowMsg(level, s_flow);
} else {
if (flow->is_flags_set(FlowEntry::IngressDir)) {
s_flow.set_direction_ing(1);
SourceIpOverride(flow, s_flow);
} else {
s_flow.set_direction_ing(0);
}
DispatchFlowMsg(level, s_flow);
}
}
// Extract all the FlowMgmtKey for a flow
void FlowMgmtManager::LogFlow(FlowEntry *flow, const std::string &op) {
FlowInfo trace;
tbb::mutex::scoped_lock mutex(flow->mutex());
flow->FillFlowInfo(trace);
FLOW_TRACE(Trace, op, trace);
}
// Extract all the FlowMgmtKey for a flow
void FlowMgmtManager::MakeFlowMgmtKeyTree(FlowEntry *flow,
FlowMgmtKeyTree *tree) {
tbb::mutex::scoped_lock mutex(flow->mutex());
acl_flow_mgmt_tree_.ExtractKeys(flow, tree);
interface_flow_mgmt_tree_.ExtractKeys(flow, tree);
vn_flow_mgmt_tree_.ExtractKeys(flow, tree);
ip4_route_flow_mgmt_tree_.ExtractKeys(flow, tree);
ip6_route_flow_mgmt_tree_.ExtractKeys(flow, tree);
bridge_route_flow_mgmt_tree_.ExtractKeys(flow, tree);
nh_flow_mgmt_tree_.ExtractKeys(flow, tree);
}
void FlowMgmtManager::AddFlow(FlowEntryPtr &flow) {
LogFlow(flow.get(), "ADD");
// Trace the flow add/change
FlowMgmtKeyTree new_tree;
MakeFlowMgmtKeyTree(flow.get(), &new_tree);
// Get old FlowMgmtKeyTree
FlowEntryInfo *old_info = LocateFlowEntryInfo(flow);
FlowMgmtKeyTree *old_tree = &old_info->tree_;
assert(old_tree);
old_info->count_++;
// Apply the difference in old and new key tree
FlowMgmtKeyTree::iterator new_it = new_tree.begin();
FlowMgmtKeyTree::iterator old_it = old_tree->begin();
while (new_it != new_tree.end() && old_it != old_tree->end()) {
FlowMgmtKey *new_key = *new_it;
FlowMgmtKey *old_key = *old_it;
if (new_key->IsLess(old_key)) {
AddFlowMgmtKey(flow.get(), old_info, new_key);
new_it++;
} else if (old_key->IsLess(new_key)) {
DeleteFlowMgmtKey(flow.get(), old_info, old_key);
FlowMgmtKeyTree::iterator tmp = old_it++;
FlowMgmtKey *key = *tmp;
old_tree->erase(tmp);
delete key;
} else {
AddFlowMgmtKey(flow.get(), old_info, new_key);
old_it++;
new_it++;
}
}
while (new_it != new_tree.end()) {
FlowMgmtKey *new_key = *new_it;
AddFlowMgmtKey(flow.get(), old_info, new_key);
new_it++;
}
while (old_it != old_tree->end()) {
FlowMgmtKey *old_key = *old_it;
DeleteFlowMgmtKey(flow.get(), old_info, old_key);
FlowMgmtKeyTree::iterator tmp = old_it++;
FlowMgmtKey *key = *tmp;
old_tree->erase(tmp);
delete key;
}
new_it = new_tree.begin();
while (new_it != new_tree.end()) {
FlowMgmtKeyTree::iterator tmp = new_it++;
FlowMgmtKey *key = *tmp;
new_tree.erase(tmp);
delete key;
}
}
void FlowMgmtManager::DeleteFlow(FlowEntryPtr &flow) {
LogFlow(flow.get(), "DEL");
// Delete entries for flow from the tree
FlowEntryInfo *old_info = FindFlowEntryInfo(flow);
if (old_info == NULL)
return;
FlowMgmtKeyTree *old_tree = &old_info->tree_;
assert(old_tree);
old_info->count_++;
FlowMgmtKeyTree::iterator old_it = old_tree->begin();
while (old_it != old_tree->end()) {
DeleteFlowMgmtKey(flow.get(), old_info, *old_it);
FlowMgmtKeyTree::iterator tmp = old_it++;
FlowMgmtKey *key = *tmp;
old_tree->erase(tmp);
delete key;
}
assert(old_tree->size() == 0);
DeleteFlowEntryInfo(flow);
}
bool FlowMgmtManager::HasVrfFlows(uint32_t vrf_id) {
if (ip4_route_flow_mgmt_tree_.HasVrfFlows(vrf_id)) {
return true;
}
if (ip6_route_flow_mgmt_tree_.HasVrfFlows(vrf_id)) {
return true;
}
if (bridge_route_flow_mgmt_tree_.HasVrfFlows(vrf_id)) {
return true;
}
return false;
}
void FlowMgmtManager::VnFlowCounters(const VnEntry *vn, uint32_t *ingress_flow_count,
uint32_t *egress_flow_count) {
vn_flow_mgmt_tree_.VnFlowCounters(vn, ingress_flow_count,
egress_flow_count);
}
FlowMgmtManager::FlowEntryInfo *
FlowMgmtManager::FindFlowEntryInfo(const FlowEntryPtr &flow) {
FlowEntryTree::iterator it = flow_tree_.find(flow);
if (it == flow_tree_.end()) {
return NULL;
}
return &it->second;
}
FlowMgmtManager::FlowEntryInfo *
FlowMgmtManager::LocateFlowEntryInfo(FlowEntryPtr &flow) {
FlowEntryInfo *info = FindFlowEntryInfo(flow);
if (info != NULL)
return info;
flow_tree_.insert(make_pair(flow, FlowEntryInfo()));
return FindFlowEntryInfo(flow);
}
void FlowMgmtManager::DeleteFlowEntryInfo(FlowEntryPtr &flow) {
FlowEntryTree::iterator it = flow_tree_.find(flow);
if (it == flow_tree_.end())
return;
assert(it->second.tree_.size() == 0);
flow_tree_.erase(it);
return;
}
/////////////////////////////////////////////////////////////////////////////
// Routines to add/delete Flow and FlowMgmtKey in different trees
/////////////////////////////////////////////////////////////////////////////
// Add a FlowMgmtKey into FlowMgmtKeyTree for an object
// The FlowMgmtKeyTree for object is passed as argument
void FlowMgmtManager::AddFlowMgmtKey(FlowEntry *flow, FlowEntryInfo *info,
FlowMgmtKey *key) {
FlowMgmtKey *tmp = key->Clone();
std::pair<FlowMgmtKeyTree::iterator, bool> ret = info->tree_.insert(tmp);
if (ret.second == false) {
delete tmp;
}
switch (key->type()) {
case FlowMgmtKey::INTERFACE:
interface_flow_mgmt_tree_.Add(key, flow);
break;
case FlowMgmtKey::ACL:
acl_flow_mgmt_tree_.Add(key, flow);
break;
case FlowMgmtKey::VN: {
bool new_flow = vn_flow_mgmt_tree_.Add(key, flow);
VnFlowMgmtEntry *entry = static_cast<VnFlowMgmtEntry *>
(vn_flow_mgmt_tree_.Find(key));
entry->UpdateCounterOnAdd(flow, new_flow, info->local_flow_,
info->ingress_);
info->local_flow_ = flow->is_flags_set(FlowEntry::LocalFlow);
info->ingress_ = flow->is_flags_set(FlowEntry::IngressDir);
break;
}
case FlowMgmtKey::INET4:
ip4_route_flow_mgmt_tree_.Add(key, flow);
break;
case FlowMgmtKey::INET6:
ip6_route_flow_mgmt_tree_.Add(key, flow);
break;
case FlowMgmtKey::BRIDGE:
bridge_route_flow_mgmt_tree_.Add(key, flow);
break;
case FlowMgmtKey::NH:
nh_flow_mgmt_tree_.Add(key, flow);
break;
default:
assert(0);
}
}
// Delete a FlowMgmtKey from FlowMgmtKeyTree for an object
// The FlowMgmtKeyTree for object is passed as argument
void FlowMgmtManager::DeleteFlowMgmtKey(FlowEntry *flow, FlowEntryInfo *info,
FlowMgmtKey *key) {
FlowMgmtKeyTree::iterator it = info->tree_.find(key);
assert(it != info->tree_.end());
switch (key->type()) {
case FlowMgmtKey::INTERFACE:
interface_flow_mgmt_tree_.Delete(key, flow);
break;
case FlowMgmtKey::ACL:
acl_flow_mgmt_tree_.Delete(key, flow);
break;
case FlowMgmtKey::VN: {
vn_flow_mgmt_tree_.Delete(key, flow);
VnFlowMgmtEntry *entry = static_cast<VnFlowMgmtEntry *>
(vn_flow_mgmt_tree_.Find(key));
if (entry)
entry->UpdateCounterOnDel(flow, info->local_flow_, info->ingress_);
info->local_flow_ = flow->is_flags_set(FlowEntry::LocalFlow);
info->ingress_ = flow->is_flags_set(FlowEntry::IngressDir);
break;
}
case FlowMgmtKey::INET4:
ip4_route_flow_mgmt_tree_.Delete(key, flow);
break;
case FlowMgmtKey::INET6:
ip6_route_flow_mgmt_tree_.Delete(key, flow);
break;
case FlowMgmtKey::BRIDGE:
bridge_route_flow_mgmt_tree_.Delete(key, flow);
break;
case FlowMgmtKey::NH:
nh_flow_mgmt_tree_.Delete(key, flow);
break;
default:
assert(0);
}
}
/////////////////////////////////////////////////////////////////////////////
// FlowMgmtKey routines
/////////////////////////////////////////////////////////////////////////////
// Event to be enqueued to free an object
FlowMgmtResponse::Event FlowMgmtKey::FreeDBEntryEvent() const {
FlowMgmtResponse::Event event = FlowMgmtResponse::INVALID;
switch (type_) {
case INTERFACE:
case ACL:
case VN:
case INET4:
case INET6:
case BRIDGE:
case NH:
case VRF:
event = FlowMgmtResponse::FREE_DBENTRY;
break;
case ACE_ID:
case VM:
event = FlowMgmtResponse::INVALID;
break;
default:
assert(0);
}
return event;
}
/////////////////////////////////////////////////////////////////////////////
// Routines on FlowMgmtTree structure within the FlowMgmtManager
// Generic code for all FlowMgmtTrees
/////////////////////////////////////////////////////////////////////////////
FlowMgmtEntry *FlowMgmtTree::Find(FlowMgmtKey *key) {
Tree::iterator it = tree_.find(key);
if (it == tree_.end())
return NULL;
return it->second;
}
FlowMgmtEntry *FlowMgmtTree::Locate(FlowMgmtKey *key) {
FlowMgmtEntry *entry = Find(key);
if (entry == NULL) {
entry = Allocate(key);
tree_[key->Clone()] = entry;
}
return entry;
}
FlowMgmtKey *FlowMgmtTree::UpperBound(FlowMgmtKey *key) {
Tree::iterator it = tree_.upper_bound(key);
if (it == tree_.end())
return NULL;
return it->first;
}
bool FlowMgmtTree::TryDelete(FlowMgmtKey *key, FlowMgmtEntry *entry) {
if (entry->CanDelete() == false)
return false;
// Send message only if we have seen DELETE message from FlowTable
if (entry->oper_state() == FlowMgmtEntry::OPER_DEL_SEEN) {
FreeNotify(key, entry->gen_id());
}
Tree::iterator it = tree_.find(key);
tree_.erase(it);
delete entry;
delete it->first;
return true;
}
/////////////////////////////////////////////////////////////////////////////
// Generic Event handler on tree for add/delete of a flow
/////////////////////////////////////////////////////////////////////////////
bool FlowMgmtTree::AddFlowMgmtKey(FlowMgmtKeyTree *tree, FlowMgmtKey *key) {
std::pair<FlowMgmtKeyTree::iterator, bool> ret = tree->insert(key);
if (ret.second == false)
delete key;
return ret.second;
}
// Adds Flow to a FlowMgmtEntry defined by key. Does not allocate FlowMgmtEntry
// if its not already present
bool FlowMgmtTree::Add(FlowMgmtKey *key, FlowEntry *flow) {
FlowMgmtEntry *entry = Locate(key);
if (entry == NULL) {
return false;
}
return entry->Add(flow);
}
bool FlowMgmtTree::Delete(FlowMgmtKey *key, FlowEntry *flow) {
Tree::iterator it = tree_.find(key);
if (it == tree_.end()) {
return false;
}
FlowMgmtEntry *entry = it->second;
bool ret = entry->Delete(flow);
TryDelete(it->first, entry);
return ret;
}
/////////////////////////////////////////////////////////////////////////////
// Event handler for add/delete/change of an object
/////////////////////////////////////////////////////////////////////////////
// Send DELETE Entry message to FlowTable module
void FlowMgmtTree::FreeNotify(FlowMgmtKey *key, uint32_t gen_id) {
assert(key->db_entry() != NULL);
FlowMgmtResponse::Event event = key->FreeDBEntryEvent();
if (event == FlowMgmtResponse::INVALID)
return;
FlowMgmtResponse resp(event, key->db_entry(), gen_id);
mgr_->ResponseEnqueue(resp);
}
// An object is added/updated. Enqueue REVALUATE for flows dependent on it
bool FlowMgmtTree::OperEntryAdd(const FlowMgmtRequest *req, FlowMgmtKey *key) {
FlowMgmtEntry *entry = Locate(key);
entry->OperEntryAdd(mgr_, req, key);
return true;
}
bool FlowMgmtTree::OperEntryChange(const FlowMgmtRequest *req,
FlowMgmtKey *key) {
FlowMgmtEntry *entry = Find(key);
if (entry) {
entry->OperEntryChange(mgr_, req, key);
}
return true;
}
bool FlowMgmtTree::OperEntryDelete(const FlowMgmtRequest *req,
FlowMgmtKey *key) {
FlowMgmtEntry *entry = Find(key);
if (entry == NULL) {
FreeNotify(key, req->gen_id());
return true;
}
entry->OperEntryDelete(mgr_, req, key);
return TryDelete(key, entry);
}
bool FlowMgmtTree::RetryDelete(FlowMgmtKey *key) {
FlowMgmtEntry *entry = Find(key);
if (entry == NULL) {
return true;
}
return TryDelete(key, entry);
}
/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
// Object Entry code
/////////////////////////////////////////////////////////////////////////////
bool FlowMgmtEntry::Add(FlowEntry *flow) {
std::pair<Tree::iterator, bool> ret = tree_.insert(flow);
return ret.second;
}
bool FlowMgmtEntry::Delete(FlowEntry *flow) {
tree_.erase(flow);
return tree_.size();
}
// An entry *cannot* be deleted if
// - It contains flows
// - It has seen ADD but not seen any DELETE
bool FlowMgmtEntry::CanDelete() const {
assert(oper_state_ != INVALID);
if (tree_.size())
return false;
return (oper_state_ != OPER_ADD_SEEN);
}
// Handle Add/Change event for the object
bool FlowMgmtEntry::OperEntryAdd(FlowMgmtManager *mgr,
const FlowMgmtRequest *req, FlowMgmtKey *key) {
oper_state_ = OPER_ADD_SEEN;
FlowMgmtResponse::Event event = req->GetResponseEvent();
if (event == FlowMgmtResponse::INVALID)
return false;
FlowMgmtResponse flow_resp(event, NULL, key->db_entry());
key->KeyToFlowRequest(&flow_resp);
Tree::iterator it = tree_.begin();
while (it != tree_.end()) {
flow_resp.set_flow(*it);
mgr->ResponseEnqueue(flow_resp);
it++;
}
return true;
}
bool FlowMgmtEntry::OperEntryChange(FlowMgmtManager *mgr,
const FlowMgmtRequest *req,
FlowMgmtKey *key) {
return OperEntryAdd(mgr, req, key);
}
// Handle Delete event for the object
bool FlowMgmtEntry::OperEntryDelete(FlowMgmtManager *mgr,
const FlowMgmtRequest *req,
FlowMgmtKey *key) {
oper_state_ = OPER_DEL_SEEN;
gen_id_ = req->gen_id();
FlowMgmtResponse::Event event = req->GetResponseEvent();
if (event == FlowMgmtResponse::INVALID)
return false;
FlowMgmtResponse flow_resp(event, NULL, key->db_entry());
key->KeyToFlowRequest(&flow_resp);
Tree::iterator it = tree_.begin();
while (it != tree_.end()) {
flow_resp.set_flow(*it);
mgr->ResponseEnqueue(flow_resp);
it++;
}
return true;
}
/////////////////////////////////////////////////////////////////////////////
// Acl Flow Management
/////////////////////////////////////////////////////////////////////////////
void AclFlowMgmtTree::ExtractKeys(FlowEntry *flow, FlowMgmtKeyTree *tree,
const MatchAclParamsList *acl_list) {
std::list<MatchAclParams>::const_iterator it;
for (it = acl_list->begin(); it != acl_list->end(); it++) {
AclFlowMgmtKey *key = new AclFlowMgmtKey(it->acl.get());
AddFlowMgmtKey(tree, key);
}
}
void AclFlowMgmtTree::ExtractKeys(FlowEntry *flow, FlowMgmtKeyTree *tree) {
ExtractKeys(flow, tree, &flow->match_p().m_acl_l);
ExtractKeys(flow, tree, &flow->match_p().m_sg_acl_l);
ExtractKeys(flow, tree, &flow->match_p().m_out_acl_l);
ExtractKeys(flow, tree, &flow->match_p().m_out_sg_acl_l);
ExtractKeys(flow, tree, &flow->match_p().m_reverse_sg_acl_l);
ExtractKeys(flow, tree, &flow->match_p().m_reverse_out_sg_acl_l);
ExtractKeys(flow, tree, &flow->match_p().m_mirror_acl_l);
ExtractKeys(flow, tree, &flow->match_p().m_out_mirror_acl_l);
ExtractKeys(flow, tree, &flow->match_p().m_vrf_assign_acl_l);
}
FlowMgmtEntry *AclFlowMgmtTree::Allocate(const FlowMgmtKey *key) {
return new AclFlowMgmtEntry();
}
/////////////////////////////////////////////////////////////////////////////
// AclId Flow Management
/////////////////////////////////////////////////////////////////////////////
void AceIdFlowMgmtTree::ExtractKeys(FlowEntry *flow, FlowMgmtKeyTree *tree,
const AclEntryIDList *ace_id_list) {
AclEntryIDList::const_iterator it;
for (it = ace_id_list->begin(); it != ace_id_list->end(); ++it) {
AceIdFlowMgmtKey *key = new AceIdFlowMgmtKey(*it);
AddFlowMgmtKey(tree, key);
}
}
void AceIdFlowMgmtTree::ExtractKeys(FlowEntry *flow, FlowMgmtKeyTree *tree,
const MatchAclParamsList *acl_list) {
std::list<MatchAclParams>::const_iterator it;
for (it = acl_list->begin(); it != acl_list->end(); it++) {
ExtractKeys(flow, tree, &it->ace_id_list);
}