[Drbd-dev] drbdsetup events patch to announce Split-brain

Montrose, Ernest Ernest.Montrose at stratus.com
Thu Oct 25 14:24:55 CEST 2007

Currently we do not use the payload for anything.  I was just being
paranoid thinking that we might need it in the future.  But you can drop
it if you wish.  If we have a pressing need for it in the future, we'll
deal with it then.


-----Original Message-----
From: Philipp Reisner [mailto:philipp.reisner at linbit.com] 
Sent: Thursday, October 25, 2007 6:16 AM
To: drbd-dev at linbit.com
Cc: Montrose, Ernest
Subject: Re: [Drbd-dev] drbdsetup events patch to announce Split-brain

On Monday 01 October 2007 23:24:02 Montrose, Ernest wrote:
> Hi,
> Included here is a small patch that I find useful when monitoring with
> drbdsetup().  It adds the ability to generate an netlink event to user
> space when drbd Split-brain and disconnect.  Based on that event we
> then take action. I could not find a more
> convenient way to know that a split-brain occurred other then looking
> /var/log/messages.

Hi Ernest,

I have nearly overlooked this patch... 
You are right, it is definitely a good idea to have that. 

I just need to change the tag number for the split_brain flag,
since that number is already allocated in drbd-8.2.0. 

The question I have, what is the flag good for ? Do you envision
an future use of it ?  otherwise I would drop it, it is possible
to have such an cn packet, that does not carry any futher data...

: Dipl-Ing Philipp Reisner                      Tel +43-1-8178292-50 :
: LINBIT Information Technologies GmbH          Fax +43-1-8178292-82 :
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