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control/controlclient: add debug netmap refcount

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Signed-off-by: Brad Fitzpatrick <brad@tailscale.com>
Signed-off-by: James Tucker <james@tailscale.com>
This commit is contained in:
James Tucker 2025-01-24 13:29:10 -08:00
parent a62fb13b63
commit 6a69c05c04
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1 changed files with 7 additions and 0 deletions
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7
control/controlclient/map.go
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@ -15,6 +15,7 @@ import (
"slices"
"strconv"
"sync"
"sync/atomic"
"time"
"tailscale.com/control/controlknobs"
@ -817,6 +818,8 @@ func (ms *mapSession) sortedPeers() []tailcfg.NodeView {
return ret
}
var numNetmaps atomic.Int64
// netmap returns a fully populated NetworkMap from the last state seen from
// a call to updateStateFromResponse, filling in omitted
// information from prior MapResponse values.
@ -841,6 +844,10 @@ func (ms *mapSession) netmap() *netmap.NetworkMap {
TKAEnabled: ms.lastTKAInfo != nil && !ms.lastTKAInfo.Disabled,
MaxKeyDuration: ms.lastMaxExpiry,
}
ms.logf("XXX NetMap++ => %v", numNetmaps.Add(1))
runtime.SetFinalizer(nm, func(nm *netmap.NetworkMap) {
ms.logf("XXX NetMap-- => %v", numNetmaps.Add(-1))
})
if ms.lastTKAInfo != nil && ms.lastTKAInfo.Head != "" {
if err := nm.TKAHead.UnmarshalText([]byte(ms.lastTKAInfo.Head)); err != nil {