[Stgt-devel] disk kicked out of RAID -> tgtd segmentation fault

[FUJITA Tomonori]

On Mon, 30 Jun 2008 10:54:48 +0200
Tomasz Chmielewski <mangoo at wpkg.org> wrote:

> Tomasz Chmielewski schrieb:
> > ronnie sahlberg schrieb:
> >> Hi Tomasz,
> >>
> >> I could not get that configuration to work.
> >>
> >> Can you please provide more detailed instructions exactly how to set
> >> up hosts A B and C
> >> so I can try to reproduce it.
> >>
> >> Please provide the exact commandline for each and every command I need
> >> to run on the three hosts and Ill try to
> >> reproduce it under gdb.
> > 
> > A faulty RAID is just one way to crash tgtd.
> > 
> > A simpler one is to just block the traffic between the target and the 
> > initiator - just login to the target, make sure there is some iSCSI 
> > traffic between the target and the initiator, then block incoming iSCSI 
> > traffic on the initiator with:
> > 
> > initiator# iptables -I INPUT -s <target IP> -p tcp --sport 3260 -j DROP
> > 
> > 
> > After a while, you will see that only one tgtd process is running, 
> > whereas the second has crashed.
> 
> Note - the above seems to be valid if:
> 
> - there are two initiators connected (from different IPs), perhaps more
> - there is traffic from these two initiators
> - we block traffic on one of these initiators
> 
> 
> I couldn't reproduce the issue with only one initiator connected.

Can you provide the detailed configuration?

Do you mean:

1. there are three machines, say A, B, and C.

2. you run tgtd on A and setup one target in tgtd.

3. B and C work as an initiator. They connect to A. So the target on A
has two sessions.

Then you block the traffic btwwen A and B, then tgtd on A dies?

Right?

I think that the output of tgtadm will enable us to understand your
configuration easily.

Thanks,