Martin Pitt
bdb302ffe6
When an automount goes away, the tokens we answer are only those we have read from the pipe. Requests the kernel queued after our last read stayed blocked: closing the pipe does not wake them, the kernel only notices the closed pipe and turns the autofs catatonic when yet another request fails to reach us, and after the lazy unmount no request reaches it anymore. In the normal stop path that window is one event loop iteration; for an automount torn down at coldplug it spans the whole reload. Set the autofs to catatonic state before letting go of it, which fails everything still queued with ENOENT. Answer the known tokens first: closing our end of the pipe before that made a racing request flip the kernel into catatonic mode on its own, which discards the queue and turns our answers into "token not found" errors. Signed-off-by: Martin Pitt <martin@amutable.com>
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