linux-kernel - Re: NCPFS and brittle connections

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Date:	Mon, 19 Feb 2007 18:47:44 -0800
From:	Petr Vandrovec <petr@...drovec.name>
To:	Pierre Ossman <drzeus-list@...eus.cx>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: NCPFS and brittle connections

Pierre Ossman wrote:
> Sorry this took so long but I got occupied with other things and this
> had to move down the pile a bit.
> 
> New patch which uses dedicated buffers for the currently active packet.
> Also adds a new state RQ_ABANDONED which basically means "the caller no
> longer cares about this request so the pointers are no longer valid". It
> is used to determine if the global receive buffer should be copied to
> the provided one upon completion.

Hello,
   it would be nice if these two copies (request->txbuf, and 
rxbuf->reply) could be eliminated, but I see no easy way how to do that...

> commit 166fb223f9507431fb97820549e3e41980987445
> Author: Pierre Ossman <ossman@...dio.se>
> Date:   Mon Feb 19 11:34:43 2007 +0100
> 
>     ncpfs: make sure server connection survives a kill
>     
>     Use internal buffers instead of the ones supplied by the caller
>     so that a caller can be interrupted without having to abort the
>     entire ncp connection.
>     
>     Signed-off-by: Pierre Ossman <ossman@...dio.se>

Acked-by: Petr Vandrovec <petr@...drovec.name>
(modulo one thing below)

> diff --git a/include/linux/ncp_fs_sb.h b/include/linux/ncp_fs_sb.h
> index a503052..d5e7ffc 100644
> --- a/include/linux/ncp_fs_sb.h
> +++ b/include/linux/ncp_fs_sb.h
> @@ -50,6 +50,8 @@ struct ncp_server {
>  	int packet_size;
>  	unsigned char *packet;	/* Here we prepare requests and
>  				   receive replies */
> +	unsigned char *txbuf;	/* Storage for current requres */

Looks like a typo?  requres => request ?

> +	unsigned char *rxbuf;	/* Storage for reply to current request */
>  
>  	int lock;		/* To prevent mismatch in protocols. */
>  	struct mutex mutex;

								Petr
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