Yep. Like I mentioned it was a purely scripting thing where I was trying to fix 
the mismatch with -I default implies iface.transport_name == tcp .

Going the -I iser way makes more sense, it would enable someone explicitly say 
use tcp if they've changed the default to something else.
-Anish

> -----Original Message-----
> From: [email protected] [mailto:[email protected]]
> On Behalf Of Michael Christie
> Sent: Friday, July 25, 2014 2:05 PM
> To: [email protected]
> Subject: Re: [PATCH trivial] iscsiadm : support using -I tcp or -I iscsi_tcp
> 
> But if you were only going to use tcp, then you do not need -I/ifaces at all.
> 
> On Jul 25, 2014, at 2:15 PM, Anish Bhatt <[email protected]> wrote:
> 
> > My motivation was that the minimum required to get tcp via -I is creating
> an iface file that only has " iface.transport_name = tcp", which seems
> unnecessary. I'll change the patch to have the changes as requested.
> >
> >> -----Original Message-----
> >> From: Mike Christie [mailto:[email protected]]
> >> Sent: Friday, July 25, 2014 10:48 AM
> >> To: [email protected]
> >> Cc: Anish Bhatt
> >> Subject: Re: [PATCH trivial] iscsiadm : support using -I tcp or -I
> >> iscsi_tcp
> >>
> >> On 07/25/2014 12:26 PM, Mike Christie wrote:
> >>> On 07/24/2014 10:24 PM, Anish Bhatt wrote:
> >>>> This came up as a scripting issue, iscsiadm currently does not
> >>>> support specifying tcp as a "default" iface when nothing else is
> available.
> >>>> Behaves exactly as if no -I option was used.
> >>>>
> >>>> Signed-off-by: Anish Bhatt <[email protected]>
> >>>> ---
> >>>> usr/iscsiadm.c | 4 ++++
> >>>> 1 file changed, 4 insertions(+)
> >>>>
> >>>> diff --git a/usr/iscsiadm.c b/usr/iscsiadm.c index 389f4b8..07cf470
> >>>> 100644
> >>>> --- a/usr/iscsiadm.c
> >>>> +++ b/usr/iscsiadm.c
> >>>> @@ -3351,6 +3351,10 @@ main(int argc, char **argv)
> >>>>                  ping_interval = atoi(optarg);
> >>>>                  break;
> >>>>          case 'I':
> >>>> +                        if (!strcmp(optarg, "tcp") ||
> >>>> +                            !strcmp(optarg, "iscsi_tcp"))
> >>>> +                                break;
> >>>> +
> >>>>                  iface = iface_alloc(optarg, &rc);
> >>>>                  if (rc == ISCSI_ERR_INVAL) {
> >>>>                          printf("Invalid iface name %s. Must be from "
> >>>>
> >>>
> >>> Why would you be passing in or tcp/iscsi_tcp if you did not create a
> >>> iface with that name?
> >>>
> >>> If you also do the above, it then works differently from if you pass
> >>> in "-I iser".
> >>
> >> I do not think we can do this patch. If the user wanted to use ifaces
> >> then they should set it up properly. If in the future they were going
> >> to set some iface setting, then I am not sure how this will work.
> >>
> >> What I should have done was name the "default" iface ("-I default"
> >> support) to tcp like with iser. I actually did the iser support later
> >> so that is why the naming is different. The default iface though was
> >> not really supposed to be used by users. It is just a dummy iface for
> compat.
> >>
> >> If you can come up with a patch to rename the default iface to tcp,
> >> and can do it in a way where existing setups are not broken I would
> >> be happy to take that patch.
> >
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