[stgt] tgtd and open-isns woes

[Chandra Seetharaman]

Hi Albert,

I am running RHEL 5.5 and isns-utils-0.91-0.1.el5. I do not see this
behavior.

In both the cases (tgtd shutdown and iSNS off), the behavior is clean.
i.e tgtd deregisters from the iSNS properly.

What version of Redhat and open-isns are you using ? 

regards,

chandra 
PS: I have some other problems with open-isns though. 

On Sun, 2010-08-08 at 12:32 +0200, Albert Pauw wrote:
> By running isnsd in the foreground with all debugging on (isnsd -f -d all)
> I can see another difference.
> 
> When tgtd is stopped, isnsd logs "connection closed by peer, killing 
> socket",
> switching isns in tgtd off doesn't give this message.
> 
> I tried searching through the tgtd isns code, but couldn't find the place
> where the socket is actually closed. It looks like it is done implicitly 
> when tgtd closes.
> If this is true I would suggest closing the socket to the isns server at 
> the end
> of the "Off" section.
> 
> Albert
> 
> 
> On 08/07/2010 09:51 AM, Albert Pauw wrote:
> > Looking at it using wireshark I noticed the following.
> >
> > Deregistering by stopping tgtd gives the following handshake sequence:
> >
> > tgtd -> isnsd: SCNDereg
> > tgtd -> isnsd: DeregDev
> > isnsd -> tgtd: SCNDeregRsp
> > isnsd -> tgtd: DeregDevRsp
> >
> > Switching isns off in tgtd gives:
> >
> > tgtd -> isnsd: SCNDereg
> > tgtd -> isnsd: DeregDev
> > isnsd -> tgtd: SCNDeregRsp
> >
> > After which isnsd goes into a spin.
> >
> > When looking at the DeregDev command send out by tgtd I see that the 
> > start/stop version hands over the following payload:
> >
> > iSCSI Name
> > Entity Identifier (aka IP address of target)
> >
> > However, looking at the manual version (switching it off) I find the 
> > following payload, which seems to choke isnsd:
> >
> > iSCSI Name
> > Entity Identifier (aka IP address of target)
> > Entity Identifier (aka IP address of target)
> > Entity Protocol (iSCSI)
> > Portal IP Address (IPv6 format)
> > Portal Port
> > SCN Port
> > iSCSI Name
> > iSCSI Node Type (target)
> >
> > From the isns rfc I find for the DeregDev command:
> >
> >     The DeregDev request message payload contains a single source
> >     attribute (IP Address or Port Name) and key attributes (IP Address,
> >     DNS Name&  Path, Node Name or Port Name).
> >
> >
> > Which looks like the first (simpler) request would be the right one.
> > Of course isnsd shoudn't choke on it, but I think the isns code needs 
> > a bit of a tweak here.
> >
> > Albert
> 
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