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fix: Clean up interfaceLockMap entries on endpoint deletion #1249

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fix: Clean up interfaceLockMap entries on endpoint deletion #1249

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08ec2d8
fix: ensure jq is installed and add coverage generation in GitHub Act…
byte-msft Jan 17, 2025
0fb0297
fix: debug the GitHub actions
byte-msft Jan 17, 2025
280a6cb
fix: Turn on --output flag on Docker build for test actions
byte-msft Jan 17, 2025
50c2a15
fix: Clean up interfaceLockMap entries on endpoint deletion
byte-msft Jan 21, 2025
5912634
Merge remote-tracking branch 'origin/main' into fix/issues/1236
byte-msft Jan 21, 2025
6b11dd5
fix: Remove obsolete Mutex creation in EndpointWatcher in PacketParse…
byte-msft Jan 21, 2025
1a1187a
fix: PacketParser Test linter processed
byte-msft Jan 21, 2025
3e78e6b
fix: Get rid of interfaceLockMap mutex from Packet Parser
byte-msft Jan 21, 2025
a4d7e14
Merge branch 'main' into fix/issues/1236
byte-msft Jan 21, 2025
31aa74c
fix: Revert getting rid of interfaceLockMap
byte-msft Jan 22, 2025
fdab1aa
fix: Add default case into endpointWatcherCallbackFn
byte-msft Jan 22, 2025
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26 changes: 19 additions & 7 deletions pkg/plugin/packetparser/packetparser_linux.go
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Original file line number Diff line number Diff line change
Expand Up @@ -380,26 +380,38 @@ func (p *packetParser) endpointWatcherCallbackFn(obj interface{}) {
}

iface := event.Obj.(netlink.LinkAttrs)

ifaceKey := ifaceToKey(iface)
lockMapVal, _ := p.interfaceLockMap.LoadOrStore(ifaceKey, &sync.Mutex{})
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mu := lockMapVal.(*sync.Mutex)
mu.Lock()
defer mu.Unlock()

switch event.Type {
case endpoint.EndpointCreated:
// Create mutex only when needed
lockMapVal, _ := p.interfaceLockMap.LoadOrStore(ifaceKey, &sync.Mutex{})
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I am curious of the need here. This seems a little bit complex and could a simpler approach be used?

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Sure, thanks

I've removed the Mutex mechanism since we're now using a sequential approach for adding and removing interfaces

mu := lockMapVal.(*sync.Mutex)
mu.Lock()
defer mu.Unlock()

p.l.Debug("Endpoint created", zap.String("name", iface.Name))
p.createQdiscAndAttach(iface, Veth)
case endpoint.EndpointDeleted:
// Get the mutex only if it exists
lockMapVal, exists := p.interfaceLockMap.Load(ifaceKey)
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if !exists {
return
}
mu := lockMapVal.(*sync.Mutex)
mu.Lock()
defer mu.Unlock()

p.l.Debug("Endpoint deleted", zap.String("name", iface.Name))
// Clean.
// Clean tcMap.
if value, ok := p.tcMap.Load(ifaceKey); ok {
v := value.(*tcValue)
p.clean(v.tc, v.qdisc)
// Delete from map.
p.tcMap.Delete(ifaceKey)
}
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We need to delete the ifacekey from interfaceLockMap if it's deleted.

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Reverted my latest changes, so I brought back the interfaceLockMap and removing the ifacekey from the map


// Clean interfaceLockMap.
p.interfaceLockMap.Delete(ifaceKey)
default:
// Unknown.
p.l.Debug("Unknown event", zap.String("type", event.Type.String()))
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18 changes: 15 additions & 3 deletions pkg/plugin/packetparser/packetparser_linux_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -162,18 +162,24 @@ func TestEndpointWatcherCallbackFn_EndpointDeleted(t *testing.T) {
ctrl := gomock.NewController(t)
defer ctrl.Finish()

// Initialize packetParser with both maps.
p := &packetParser{
cfg: cfgPodLevelEnabled,
l: log.Logger().Named("test"),
interfaceLockMap: &sync.Map{},
tcMap: &sync.Map{},
}
p.tcMap = &sync.Map{}

// Create test interface attributes.
linkAttr := netlink.LinkAttrs{
Name: "test",
HardwareAddr: []byte("test"),
NetNsID: 1,
}
key := ifaceToKey(linkAttr)

// Pre-populate both maps to simulate existing interface
p.interfaceLockMap.Store(key, &sync.Mutex{})
p.tcMap.Store(key, &tcValue{nil, &tc.Object{}})

// Create EndpointDeleted event.
Expand All @@ -182,10 +188,16 @@ func TestEndpointWatcherCallbackFn_EndpointDeleted(t *testing.T) {
Obj: linkAttr,
}

// Execute the callback.
p.endpointWatcherCallbackFn(e)

_, ok := p.tcMap.Load(key)
assert.False(t, ok)
// Verify both maps are cleaned up.
_, tcMapExists := p.tcMap.Load(key)
_, lockMapExists := p.interfaceLockMap.Load(key)

// Assert both maps are cleaned up
assert.False(t, tcMapExists, "tcMap entry should be deleted")
assert.False(t, lockMapExists, "interfaceLockMap entry should be deleted")
}

func TestCreateQdiscAndAttach(t *testing.T) {
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