[OpenAFS] Is there a simple programatic method of verifying accessibility of a cell?

Jeffrey Altman openafs-info@openafs.org
Thu, 11 Sep 2003 15:07:04 -0400


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David Bear wrote:

>On Wed, Sep 10, 2003 at 12:21:00PM -0400, Jeffrey Altman wrote:
>  
>
>>a good possibility that the cell is accessible.  If the new IP address 
>>is on a network which is partitioned from the cell (there is no route to 
>>the cell servers) I do not want to prompt the user.
>>    
>>
>
>maybe you could 1) mark the afs service in the service control manager
>as 'manual' start -- 2) then write a script that net starts afs, and
>iff it start, then do a klog?
>  
>
The ability of the AFS Client Service to start is completely independent of
whether or not it is capable of communicating with one or more cells.
The AFS Client Service only requires that there be at least one network 
adapter on the machine with a valid IP address.  This can be the 
Microsoft Loopback adapter, the Microsoft TV/Video adapter, VMWare 
virtual adapters, etc.  None of which require the computer to be plugged 
into a public network.  (The Bridge adapter in XP might work as well I 
need to test that.)

The scenario is that the AFS Client Service is up and running all happy 
but without access to a cell.  The computer is then plugged into the 
network.  (I detect this event with the IP Helper API.)  At this point I 
want to accomplish two things:

   1. check to see if the default cell has no valid token
   2. check to see if we have connectivity to the cell

If both of these are true, then I will try to perform a klog for the user.

I think the suggestion of Derrick to use JHutz's fsping will work for me 
with some minor adjustments.

Jeffrey Altman

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