linux-kernel - Re: [Nbd] [PATCH 3/3]nbd: make nbd device wait for its users

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Message-ID: <576D38C4.6050702@redhat.com>
Date:	Fri, 24 Jun 2016 07:42:28 -0600
From:	Eric Blake <eblake@...hat.com>
To:	"Pranay Kr. Srivastava" <pranjas@...il.com>, mpa@...gutronix.de,
	nbd-general@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
	w@...r.be
Subject: Re: [Nbd] [PATCH 3/3]nbd: make nbd device wait for its users

On 06/24/2016 04:09 AM, Pranay Kr. Srivastava wrote:
> When a timeout occurs or a recv fails, then
> instead of abruplty killing nbd block device

s/abruplty/abruptly/

> wait for it's users to finish.

s/it's/its/

> 
> This is more required when filesystem(s) like
> ext2 or ext3 don't expect their buffer heads to
> disappear while the filesystem is mounted.
> 
> Each open of a nbd device is refcounted, while
> the userland program [nbd-client] doing the
> NBD_DO_IT ioctl would now wait for any other users
> of this device before invalidating the nbd device.
> 
> A timedout or a disconnected device, if in use, can't
> be used until it has been resetted. The resetting happens

s/resetted/reset/

> when all tasks having this bdev open closes this bdev.
> 
> Signed-off-by: Pranay Kr. Srivastava <pranjas@...il.com>
> ---
>  drivers/block/nbd.c | 124 ++++++++++++++++++++++++++++++++++++++++------------
>  1 file changed, 96 insertions(+), 28 deletions(-)
> 


-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org



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