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cmd/tailscaled, ipn/ipnlocal, wgengine: shutdown tailscaled if wgdevice is closed

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Tailscaled becomes inoperative if the Tailscale Tunnel wintun adapter is abruptly removed.
wireguard-go closes the device in case of a read error, but tailscaled keeps running.
This adds detection of a closed WireGuard device, triggering a graceful shutdown of tailscaled.
It is then restarted by the tailscaled watchdog service process.

Fixes #11222

Signed-off-by: Nick Khyl <nickk@tailscale.com>
This commit is contained in:
Nick Khyl
2024-02-23 19:55:08 -06:00
committed by Nick Khyl
parent b42b9817b0
commit 7ef1fb113d
6 changed files with 46 additions and 16 deletions
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2
net/dns/manager_windows.go
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@@ -92,7 +92,7 @@ func (m *windowsManager) openInterfaceKey(pfx winutil.RegistryPathPrefix) (regis
func (m *windowsManager) muteKeyNotFoundIfClosing(err error) error {
m.mu.Lock()
defer m.mu.Unlock()
if !m.closing || (err != windows.ERROR_FILE_NOT_FOUND && err != windows.ERROR_PATH_NOT_FOUND) {
if !m.closing || (!errors.Is(err, windows.ERROR_FILE_NOT_FOUND) && !errors.Is(err, windows.ERROR_PATH_NOT_FOUND)) {
return err
}