linux-kernel - Re: NCPFS and brittle connections

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Date:	Thu, 04 Jan 2007 20:30:43 +0100
From:	Pierre Ossman <drzeus-list@...eus.cx>
To:	Petr Vandrovec <vandrove@...cvut.cz>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: NCPFS and brittle connections

Petr Vandrovec wrote:
>
> Nobody is working on it (at least to my knowledge), and to me it is
> feature - it always worked this way, like smbfs did back in the past -
> if you send signal 9 to process using mount point, and there is some
> transaction in progress, nobody can correctly finish that transaction
> anymore.  Fixing it would require non-trivial amount of code, and
> given that NCP itself is more or less dead protocol I do not feel that
> it is necessary.
>

Someone needs to tell our customers then so they'll stop using it. :)

> If you want to fix it, feel free.  Culprit is RQ_INPROGRESS handling
> in ncp_abort_request - it just aborts whole connection so it does not
> have to provide temporary buffers and special handling for reply - as
> buffers currently specified as reply buffers are owned by caller, so
> after aborting request you cannot use them anymore.

Do you have any pointers to how it was solved with smbfs? Relevant
patches perhaps? Provided a similar solution can be applied here.

Rgds

-- 
     -- Pierre Ossman

  Linux kernel, MMC maintainer        http://www.kernel.org
  PulseAudio, core developer          http://pulseaudio.org
  rdesktop, core developer          http://www.rdesktop.org

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