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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