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[warm reboot] Warm Reboot Support for EVPN VXLAN #350

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merged 3 commits into from
Oct 12, 2020
Merged

[warm reboot] Warm Reboot Support for EVPN VXLAN #350

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8e2d58d
[warm reboot] Warm Reboot Support for EVPN VXLAN
srj102 Jun 10, 2020
bb5f793
[warm reboot] Warm Reboot Support for EVPN VXLAN
nkelapur Oct 1, 2020
c009f37
[warm reboot] Warm Reboot Support for EVPN VXLAN
nkelapur Oct 9, 2020
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40 changes: 39 additions & 1 deletion common/warm_restart.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,10 @@ const WarmStart::WarmStartStateNameMap WarmStart::warmStartStateNameMap =
{
{INITIALIZED, "initialized"},
{RESTORED, "restored"},
{RECONCILED, "reconciled"}
{REPLAYED, "replayed"},
{RECONCILED, "reconciled"},
{WSDISABLED, "disabled"},
{WSUNKNOWN, "unknown"}
};

const WarmStart::DataCheckStateNameMap WarmStart::dataCheckStateNameMap =
Expand Down Expand Up @@ -181,6 +184,41 @@ bool WarmStart::isSystemWarmRebootEnabled(void)
return warmStart.m_systemWarmRebootEnabled;
}

void WarmStart::getWarmStartState(const std::string &app_name, WarmStartState &state)
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@qiluo-msft qiluo-msft Sep 10, 2020 •
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WarmStartState [](start = 63, length = 14)

Why not just return this state? #WontFix

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Don't see any issue with pass by reference. Will consider that while updating other files where this api is used.

{
std::string statestr;

auto& warmStart = getInstance();

state = RECONCILED;

if (!isWarmStart())
{
return;
}

warmStart.m_stateWarmRestartTable->hget(app_name, "state", statestr);

/* If warm-start is enabled, state cannot be assumed as Reconciled
* It should be set to unknown
*/
state = WSUNKNOWN;
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@qiluo-msft qiluo-msft Sep 10, 2020 •
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state = WSUNKNOWN; [](start = 4, length = 18)

Is it expected state in runtime? If not, just throw an exception. #Closed

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Yes, this is expected. When Module A check for the status of Module B, module B may not have reached/initialised to any state yet. Hence module A needs to know that Module B is not ready yet an act accordingly.


for (auto it = warmStartStateNameMap.begin(); it != warmStartStateNameMap.end(); it++)
{
if (it->second == statestr)
{
state = it->first;
break;
}
}

SWSS_LOG_INFO("%s warm start state get %s(%d)",
app_name.c_str(), statestr.c_str(), state);

return;
}

// Set the WarmStart FSM state for a particular application.
void WarmStart::setWarmStartState(const std::string &app_name, WarmStartState state)
{
Expand Down
6 changes: 6 additions & 0 deletions common/warm_restart.h
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,10 @@ class WarmStart
{
INITIALIZED,
RESTORED,
REPLAYED,
RECONCILED,
WSDISABLED,
WSUNKNOWN,
};

enum DataCheckState
Expand Down Expand Up @@ -53,6 +56,9 @@ class WarmStart

static bool isSystemWarmRebootEnabled(void);

static void getWarmStartState(const std::string &app_name,
WarmStartState &state);

static void setWarmStartState(const std::string &app_name,
WarmStartState state);

Expand Down