[stgt] backing-store options

[Dan Mick]

On 10/03/2013 05:23 PM, Boaz Harrosh wrote:
> On 10/03/2013 04:40 PM, Dan Mick wrote:
>>
>> Yeah, that's always an option, but it's somewhat cumbersome; we did that
>> for a while with the rbd extensions to qemu, but they were pretty much
>> universally hated.  I think an option string is cleaner.  But I'm not
>> adamant.  Any other opinions?  (I have a prototype implementation; the
>> changes are small and obvious; end up in one new parameter to
>> (*bs_init)(lu, bsopts))
>>
>>
>
> Go for it it is good for me. (I was just saying)
>
> bsopts will that be a free form string or should we make it a name=value pair
> and perhaps a common utility to extract those?
>
> What is the CLI format of this:
> 	--bsopts name1=value1:name2=value2
>
> How did you implement this, or is there only one value supported?

I was thinking only one value, and I know it can't include comma (the 
way tgtadm sends options), but otherwise it's freeform.  (Actually there
might be other illegal chars; I should find out and specify.)

I was thinking of using it like "-o value --longopt=value" etc., but, as 
it's freeform, backends can do whatever they like.

Or we could provide some more mechanism, but I figured since I'm the one 
who wants it, I might be the only one who ever does.
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