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ebpf tracker: add callback for lost events

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Lost events were previously unnoticed. This patch adds an error in the
log and stops the ebpf tracker if an event is lost.
This commit is contained in:
Alban Crequy
2017-05-09 11:01:00 +02:00
parent fc0e4490dd
commit 9079677873
1 changed files with 7 additions and 1 deletions
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8
probe/endpoint/ebpf.go
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@@ -82,7 +82,7 @@ func newEbpfTracker() (eventTracker, error) {
return nil, fmt.Errorf("kernel not supported: %v", err)
}
t, err := tracer.NewTracer(tcpEventCbV4, tcpEventCbV6)
t, err := tracer.NewTracer(tcpEventCbV4, tcpEventCbV6, lostCb)
if err != nil {
return nil, err
}
@@ -119,6 +119,12 @@ func tcpEventCbV6(e tracer.TcpV6) {
// TODO: IPv6 not supported in Scope
}
func lostCb(count uint64) {
log.Errorf("tcp tracer lost %d events. Stopping the eBPF tracker", count)
ebpfTracker.dead = true
ebpfTracker.stop()
}
func (t *EbpfTracker) handleConnection(ev tracer.EventType, tuple fourTuple, pid int, networkNamespace string) {
t.Lock()
defer t.Unlock()