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[mirrororch]: Freeze doTask() function instead of update() function
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With this update, we could fix potential orchagent issues before
the warm reboot when the monitor port was wrongly calculated.

Signed-off-by: Shu0T1an ChenG <shuche@microsoft.com>
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Shu0t1an Cheng committed Sep 18, 2019
1 parent 29b4999 commit 7befdb8
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Showing 2 changed files with 66 additions and 91 deletions.
151 changes: 63 additions & 88 deletions orchagent/mirrororch.cpp
View file
Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@
#define MIRROR_SESSION_STATUS "status"
#define MIRROR_SESSION_STATUS_ACTIVE "active"
#define MIRROR_SESSION_STATUS_INACTIVE "inactive"
#define MIRROR_SESSION_NEXT_HOP_IP "next_hop_ip"
#define MIRROR_SESSION_SRC_IP "src_ip"
#define MIRROR_SESSION_DST_IP "dst_ip"
#define MIRROR_SESSION_GRE_TYPE "gre_type"
Expand Down Expand Up @@ -59,6 +60,7 @@ MirrorEntry::MirrorEntry(const string& platform) :
}

nexthopInfo.prefix = IpPrefix("0.0.0.0/0");
nexthopInfo.nexthop = IpAddress("0.0.0.0");
}

MirrorOrch::MirrorOrch(TableConnector stateDbConnector, TableConnector confDbConnector,
Expand All @@ -81,7 +83,7 @@ bool MirrorOrch::bake()
SWSS_LOG_ENTER();

// Freeze the route update during orchagent restoration
m_freezeUpdate = true;
m_freeze = true;

deque<KeyOpFieldsValuesTuple> entries;
vector<string> keys;
Expand All @@ -93,7 +95,7 @@ bool MirrorOrch::bake()

bool active = false;
string monitor_port;
string vlan_id;
string next_hop_ip;

for (const auto &tuple : tuples)
{
Expand All @@ -105,9 +107,9 @@ bool MirrorOrch::bake()
{
monitor_port = fvValue(tuple);
}
else if (fvField(tuple) == MIRROR_SESSION_VLAN_ID)
else if (fvField(tuple) == MIRROR_SESSION_NEXT_HOP_IP)
{
vlan_id = fvValue(tuple);
next_hop_ip = fvValue(tuple);
}
}

Expand All @@ -116,10 +118,11 @@ bool MirrorOrch::bake()
continue;
}

SWSS_LOG_NOTICE("Found mirror session %s active before warm reboot");
SWSS_LOG_NOTICE("Found mirror session %s active before warm reboot",
key.c_str());

// Recover saved active session's monitor port
m_recoverySessionPortMap.emplace(key, vlan_id + ":" + monitor_port);
m_recoverySessionMap.emplace(key, monitor_port + "|" + next_hop_ip);
}

return Orch::bake();
Expand All @@ -131,77 +134,13 @@ bool MirrorOrch::postBake()

SWSS_LOG_NOTICE("Start MirrorOrch post-baking");

for (auto it = m_syncdMirrors.begin(); it != m_syncdMirrors.end(); ++it)
{
const string name = it->first;
auto& session = it->second;

if (m_recoverySessionPortMap.find(name) != m_recoverySessionPortMap.end())
{
auto tokens = tokenize(m_recoverySessionPortMap[name], ':');
string vlan_id = tokens[0];
string alias = tokens[1];

SWSS_LOG_NOTICE("Recover mirror session %s with monitor port %s",
name.c_str(), alias.c_str());

Port port;
m_portsOrch->getPort(alias, port);

// If the port belongs to a VLAN
if (vlan_id != "0")
{
Port vlan;
m_portsOrch->getPort("Vlan" + vlan_id, vlan);

NeighborEntry neighbor_entry;
MacAddress mac;
m_neighOrch->getNeighborEntry(vlan.m_alias, neighbor_entry, mac);

SWSS_LOG_NOTICE("Monitor port %s belongs to neighbor %s with IP %s",
port.m_alias.c_str(), vlan.m_alias.c_str(),
neighbor_entry.ip_address.to_string().c_str());

session.nexthopInfo.nexthop = neighbor_entry.ip_address;
}
// If the port belongs to a LAG
if (port.m_lag_id)
{
Port lag;
m_portsOrch->getPort(port.m_lag_id, lag);

NeighborEntry neighbor_entry;
MacAddress mac;
m_neighOrch->getNeighborEntry(lag.m_alias, neighbor_entry, mac);

SWSS_LOG_NOTICE("Monitor port %s belongs to neighbor %s with IP %s",
port.m_alias.c_str(), lag.m_alias.c_str(),
neighbor_entry.ip_address.to_string().c_str());

session.nexthopInfo.nexthop = neighbor_entry.ip_address;
}
else
{
NeighborEntry neighbor_entry;
MacAddress mac;
m_neighOrch->getNeighborEntry(port.m_alias, neighbor_entry, mac);

SWSS_LOG_NOTICE("Neighbor %s has IP %s",
port.m_alias.c_str(),
neighbor_entry.ip_address.to_string().c_str());

session.nexthopInfo.nexthop = neighbor_entry.ip_address;
}
// Unfreeze the route update
m_freeze = false;

updateSession(name, session);
}
}
Orch::doTask();

// Clean up the recovery cache
m_recoverySessionPortMap.clear();

// Unfreeze the route update
m_freezeUpdate = false;
m_recoverySessionMap.clear();

return Orch::postBake();
}
Expand All @@ -210,11 +149,6 @@ void MirrorOrch::update(SubjectType type, void *cntx)
{
SWSS_LOG_ENTER();

if (m_freezeUpdate)
{
return;
}

assert(cntx);

switch(type) {
Expand Down Expand Up @@ -492,6 +426,12 @@ void MirrorOrch::setSessionState(const string& name, const MirrorEntry& session,
fvVector.emplace_back(MIRROR_SESSION_VLAN_ID, value);
}

if (attr.empty() || attr == MIRROR_SESSION_NEXT_HOP_IP)
{
value = session.nexthopInfo.nexthop.to_string();
fvVector.emplace_back(MIRROR_SESSION_NEXT_HOP_IP, value);
}

m_mirrorTable.set(name, fvVector);
}

Expand Down Expand Up @@ -534,13 +474,16 @@ bool MirrorOrch::getNeighborInfo(const string& name, MirrorEntry& session)
return false;
}

// Recover the monitor port picked before warm reboot
if (m_recoverySessionPortMap.find(name) != m_recoverySessionPortMap.end())
// Recover the LAG member monitor port picked before warm reboot
// to minimalize the data plane changes across warm reboot.
if (m_recoverySessionMap.find(name) != m_recoverySessionMap.end())
{
string alias = tokenize(m_recoverySessionPortMap[name], ':')[1];
string alias = tokenize(m_recoverySessionMap[name], '|')[0];
Port member;
m_portsOrch->getPort(alias, member);

SWSS_LOG_NOTICE("Recover mirror session %s with LAG member port %s",
name.c_str(), alias.c_str());
session.neighborInfo.portId = member.m_port_id;
}
else
Expand All @@ -560,13 +503,16 @@ bool MirrorOrch::getNeighborInfo(const string& name, MirrorEntry& session)
SWSS_LOG_NOTICE("Get mirror session destination IP neighbor VLAN %d",
session.neighborInfo.port.m_vlan_info.vlan_id);

// Recover the monitor port picked before warm reboot
if (m_recoverySessionPortMap.find(name) != m_recoverySessionPortMap.end())
// Recover the VLAN member monitor port picked before warm reboot
// since the FDB entries are not yet learned on the hardware
if (m_recoverySessionMap.find(name) != m_recoverySessionMap.end())
{
string alias = tokenize(m_recoverySessionPortMap[name], ':')[1];
string alias = tokenize(m_recoverySessionMap[name], '|')[0];
Port member;
m_portsOrch->getPort(alias, member);

SWSS_LOG_NOTICE("Recover mirror session %s with VLAN member port %s",
name.c_str(), alias.c_str());
session.neighborInfo.portId = member.m_port_id;
}
else
Expand Down Expand Up @@ -948,10 +894,34 @@ void MirrorOrch::updateNextHop(const NextHopUpdate& update)

if (update.nexthopGroup != IpAddresses())
{
SWSS_LOG_INFO(" next hop IPs: %s", update.nexthopGroup.to_string().c_str());
SWSS_LOG_NOTICE(" next hop IPs: %s", update.nexthopGroup.to_string().c_str());

// Pick the first one from the next hop group
session.nexthopInfo.nexthop = *update.nexthopGroup.getIpAddresses().begin();
// Recover the session based on the state database information
if (m_recoverySessionMap.find(name) != m_recoverySessionMap.end())
{
IpAddress nexthop = IpAddress(tokenize(m_recoverySessionMap[name], '|')[1]);

// Check if recovered next hop IP is within the update's next hop IPs
if (update.nexthopGroup.getIpAddresses().count(nexthop))
{
SWSS_LOG_NOTICE("Recover mirror session %s with next hop %s",
name.c_str(), nexthop.to_string().c_str());
session.nexthopInfo.nexthop = nexthop;
}
else
{
// Correct the next hop IP
SWSS_LOG_NOTICE("Correct mirror session %s next hop from %s to %s",
name.c_str(), session.nexthopInfo.nexthop.to_string().c_str(),
nexthop.to_string().c_str());
session.nexthopInfo.nexthop = *update.nexthopGroup.getIpAddresses().begin();
}
}
else
{
// Pick the first one from the next hop group
session.nexthopInfo.nexthop = *update.nexthopGroup.getIpAddresses().begin();
}
}
else
{
Expand Down Expand Up @@ -1137,6 +1107,11 @@ void MirrorOrch::doTask(Consumer& consumer)
{
SWSS_LOG_ENTER();

if (m_freeze)
{
return;
}

if (!gPortsOrch->allPortsReady())
{
return;
Expand Down
6 changes: 3 additions & 3 deletions orchagent/mirrororch.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -88,10 +88,10 @@ class MirrorOrch : public Orch, public Observer, public Subject
Table m_mirrorTable;

MirrorTable m_syncdMirrors;
// session_name -> VLAN : monitor_port_alias
map<string, string> m_recoverySessionPortMap;
// session_name -> VLAN | monitor_port_alias | next_hop_ip
map<string, string> m_recoverySessionMap;

bool m_freezeUpdate = false;
bool m_freeze = false;

void createEntry(const string&, const vector<FieldValueTuple>&);
void deleteEntry(const string&);
Expand Down

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