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SubjectRe: [PATCH] nbd: show nbd client pid in sysfs

> > > This simple patch allows nbd to expose the nbd-client
> > > daemon's PID in /sys/block/nbd<x>/pid. This is helpful
> > > for tracking connection status of a device and for
> > > determining which nbd devices are currently in use.
> >
> > Actually is it needed at all? Perhaps nbd clients should be modified
> > to put nbdX in their process nam?
> I don't think that's the right approach; only the kernel can guarantee
> that a given process is actually managing a given nbd device (I could
> have some rogue process running around announcing that it's managing
> nbd2, and then what?)

I'd say "do not run rogue processes as root" :-).

nbd-client should run as root -- I do not think interface was
carefully audited to run it as a user -- so rogue process should not
really be a problem.
(cesky, pictures)
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