Re: [autofs] [RFC] Towards a Modern Autofs

[Mike Waychison]

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raven@xxxxxxxxxx wrote:

>On Mon, 12 Jan 2004, Mike Waychison wrote:
>
>  
>
>>>Transparency of an autofs filesystem (as I'm calling it) is the situation
>>>where, given a map
>>>
>>>/usr	/man1	server:/usr/man1
>>>	/man2	server:/usr/man2
>>>
>>>where the filesystem /usr contains, say a directory lib, that needs to be
>>>available while also seeing the automounted directories.
>>>
>>> 
>>>
>>>      
>>>
>>I see.  This requires direct mount triggers to do properly.  Trying to 
>>do it with some sort of passthrough to the underlying filesystem is a 
>>nightmare waiting to happen..
>>
>>    
>>
>
>So what are we saying here?
>
>We install triggers at /usr/man1 and /usr/man2.
>Then suppose the map had a nobrowse option.
>Does the trigger also take care of hiding man1 and man2?
>
>Is there some definition of these triggers?
>  
>
The example above is a direct map entry with no root offset.  The 
semantics are different than if it were an indirect map with browsing 
enable. 

I tested this out against other automount implementations and discovered 
that direct map entries with no root offsets should be broken down into 
several direct map entries with root offsets.. so:

/usr   /man1   server:/usr/man1   \
          /man2   server:/usr/man2

is the same as the two distinct entries:

/usr/man1   server:/usr/man1
/usr/man2   server:/usr/man2

Now that I think about it, the discussion in my proposal paper about 
multimounts with no root offsets probably isn't required.

-- 
Mike Waychison
Sun Microsystems, Inc.
1 (650) 352-5299 voice
1 (416) 202-8336 voice
mailto: Michael.Waychison@xxxxxxx
http://www.sun.com

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
NOTICE:  The opinions expressed in this email are held by me, 
and may not represent the views of Sun Microsystems, Inc.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 


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