[OpenAFS] Re: Security Advisory 2016-003 and 'bos salvage' questions

Garance A Drosehn drosih@rpi.edu
Thu, 16 Feb 2017 23:52:47 -0500

On 15 Feb 2017, at 13:48, Garance A Drosehn wrote:

> I had an odd situation pop up when upgrading to OpenAFS

> On my most-recent server, my script which does step #4 moved 26
> volumes, and then hit this error on the 27th one:
>>    Failed to move data for the volume 53.....75
>>       VOLSER: Problems encountered in doing the dump !
>>      Recovery:Failed to start transaction on 53.....75
>>       Volume needs to be salvaged

Here's a short follow-up on this, although no one else has commented
on it.

FWIW, I did do the 'bos salvage -salvagedirs', and it automatically
stops and starts the 'fs' process around the salvaging step.  It
took 2m17.62s on a file server which has used up 40.96-gig out of
153.53-gig on the server.  And it took 24m19.27s on a file server
which has used 145.46-gig of the 255.88-gig on the server.

However, there's definitely something odd going on with the step
where I 'vos move' volumes from my temp-server back to the file server
they were originally on.  I'm seeing 'core' files under /usr/afs/logs
on the destination of that 'vos move'.  Also, after a failed 'vos move'
a 'vos examine' of the volume will display an volume-ID for a read-only
instance of the volume, even though the volume did not have a read-only
instance before the move.  It isn't that there *is* a read-only
instance, just that the RDOnly field is filled in whereas it used to
be 0.

I've had three different volumes fail when I tried to move them, and
all had a volume-id appear for the read-only instance.  For the
initial 26 volumes which were successfully moved, they still show a
RDOnly volume-id of 0.

Obviously I need to do some more investigation, but I thought I'd
mention these bits.  I guess I might need to learn what to do with
the afs core files!

Garance Alistair Drosehn                =     drosih@rpi.edu
Senior Systems Programmer               or   gad@FreeBSD.org
Rensselaer Polytechnic Institute;             Troy, NY;  USA