[stgt] tgt-admin and a -C, --control-port argument

Chandra Seetharaman sekharan at us.ibm.com
Fri Apr 2 03:25:02 CEST 2010

On Fri, 2010-04-02 at 09:57 +0900, FUJITA Tomonori wrote:
> On Thu, 01 Apr 2010 09:54:54 -0700
> Chandra Seetharaman <sekharan at us.ibm.com> wrote:
> > 
> > 1. The purpose of multiple tgtds (and the control port) is to make each 
> >    tgtd dedicated to ipaddress (or port).
> > 
> > 2. Each target will be associated with only one ip address (which also
> >    means we have to add a ip address token to target definition).
> > 
> > (1) and (2) make me think that we do not need an explicit "control port"
> > parameter for targets.conf syntax.
> > 
> > If any target has a ip address specifically defined, then tgt-admin can
> > define a control port and use it at the right place (as it does with tid
> > currently) and keep the control port definition totally internal to
> > tgt-admin.
> Yeah, we could generate 'control port' from 'iscsi ip
> address (or port)'. However, tgt needs to support more than iSCSI.

I don't see any problems with that. In future when we add portals for
different protocols, we can create control ports for them too.

> > Does it make sense ? Or am I missing something ?
> > 
> > I had a related question, will we ever want to make multiple ip
> > addresses served by a single tgtd ? 
> Yeah, by default, tgtd accepts any ip addresses of the host. Can can
> change this behavior with 'portal' option.

My question is will be allowing association of more than one ip address
to a control port.

If that is the case would all the targets associated with that  control
port will be available thru all the ip addresses that are associated
with that control port ?

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