linux-kernel - Re: [PATCH] rbd: revalidate

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Date:	Wed, 10 Apr 2013 21:53:27 -0500
From:	Alex Elder <elder@...tank.com>
To:	Laurent Barbe <laurent@...eris.com>
CC:	ceph-devel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rbd: revalidate_disk upon rbd resize

On 04/10/2013 02:30 PM, Alex Elder wrote:
> On 04/10/2013 11:06 AM, Laurent Barbe wrote:
>> If rbd disk is open and rbd resize is done, new size is not visible by
>> filesystem.
>> Like is done in virtio-blk and dm driver, revalidate_disk() permits to
>> update the bd_inode size.
> 
> Looks good to me.  I'll take this in via the ceph-client tree.
> Thanks a lot.

Unfortunately this leads to a lock inversion.  I'm going to
think about how to go about resolving it, so I won't be
committing it just yet.

					-Alex

> 
> Reviewed-by: Alex Elder <elder@...tank.com>
> 
>> Signed-off-by: Laurent Barbe <laurent@...eris.com>
>> ---
>>  drivers/block/rbd.c |    1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
>> index f556f8a..1963025 100644
>> --- a/drivers/block/rbd.c
>> +++ b/drivers/block/rbd.c
>> @@ -2293,6 +2293,7 @@ static void rbd_update_mapping_size(struct rbd_device *rbd_dev)
>>  	dout("setting size to %llu sectors", (unsigned long long) size);
>>  	rbd_dev->mapping.size = (u64) size;
>>  	set_capacity(rbd_dev->disk, size);
>> +	revalidate_disk(rbd_dev->disk);
>>  }
>>  
>>  /*
>>
> 

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