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ipn/ipnlocal: debounce extra enqueues in ExtensionHost.AuthReconfigAsync

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Fixes tailscale/corp#39065

Signed-off-by: Michael Ben-Ami <mzb@tailscale.com>
This commit is contained in:
Michael Ben-Ami 2026-03-24 15:11:11 -04:00 committed by mzbenami
parent c026be18cc
commit a57c6457c9
1 changed files with 11 additions and 0 deletions
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11
ipn/ipnlocal/extension_host.go
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@ -90,6 +90,11 @@ type ExtensionHost struct {
extByType sync.Map // reflect.Type -> ipnext.Extension
// hasPendingAuthReconfig tracks whether an AuthReconfig call
// has been enqueued but not yet executed. It avoids redundant
// reconfigs and prevents them from piling up in the workQueue.
hasPendingAuthReconfig atomic.Bool
// mu protects the following fields.
// It must not be held when calling [LocalBackend] methods
// or when invoking callbacks registered by extensions.
@ -544,11 +549,17 @@ func (h *ExtensionHost) Shutdown() {
}
// AuthReconfigAsync implements [ipnext.Host.AuthReconfigAsync].
// Since execution uses the most recent state at execution time,
// multiple enqueued calls are redundant and are not enqueued.
func (h *ExtensionHost) AuthReconfigAsync() {
if h == nil {
return
}
if h.hasPendingAuthReconfig.Swap(true) {
return
}
h.enqueueBackendOperation(func(b Backend) {
h.hasPendingAuthReconfig.Store(false)
b.authReconfig()
})
}