Re: [Nbd] [PATCH v2] nbd: nbd sysfs framework

[Wouter Verhelst <w@...112...>]

On Thu, Aug 04, 2011 at 06:11:27PM -0400, paul.clements@...124... wrote:
> diff --git a/Documentation/ABI/testing/sysfs-block-nbd b/Documentation/ABI/testing/sysfs-block-nbd
> new file mode 100644
> index 0000000..3728d9f
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-block-nbd
> @@ -0,0 +1,8 @@
> +What:		/sys/block/nbd<id>/nbd/pid
> +Date:		August 2011
> +Contact:	Paul Clements <paul.clements@...124...>
> +Description:
> +		The pid file is read-only and specifies the pid of the
> +		caller of NBD_DO_IT ioctl (normally this is the nbd-client).
> +		The pid will be zero if the nbd connection is not
> +		currently established.

That's different from current behaviour: in the current implementation,
the absense of a connection is signalled by the absense of the PID file,
rather than the contents being zero. Dunno whether that change is
intentional, but I thought I'd check before changing nbd-client code...

-- 
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pi zz a