Jail Quotas - quota.user hard link

[Michael R. Wayne]

On Wed, Apr 26, 2006 at 06:23:59PM -0400, Charles Sprickman wrote:
> 
> I have a question about using quotas in a jail with FreeBSD 6.x.  So far I 
> have had no problems on a test box with setting quotas from the host using 
> a numeric UID (ie: edquota -u 20000 where UID 20000 is a user that only 
> exists in a jail).  That seems to "just work".

Just a heads up: quotas in jails on FreeBSD 6 are pretty broken.  I'll
include some workarounds.


Basic operation can be done by specifying a filename, available in the jail,
which contains the quotas.  So, on the base system, /etc/fstab contains:

/dev/twed0s2f /usr/jails/foo.bar.com ufs rw,userquota=/usr/jails/foo.bar.com/usr/quotas/shell.root 2 2

and on the foo.bar.com jail, /etc/fstab contains:

/dev/twed0s2f   /  ufs rw,userquota=/usr/quotas/shell.root,noauto      2       2


Now the problems begin.

You either do
   chmod a+r /usr/quotas/shell.root
which permits everyone on the machine to read all quotas (both
quota and repquota) or
   chmod o-r /usr/quotas/shell.root
which permits ONLY root to read any quotas.  Normal users can
not see their own quotas (I filed a PR on this quite some time back,
nobody seems interested).  This seems to be new breakage since 4.x

Also, if you edquota from within the jail, it does not really take 
effect.  You can stick an hourly cron script on the base system containing
   quotaoff -a
   quotacheck -a
   quotaon -a
which will "fixup" the mess.  Alternately, you can only use edquota 
from the base system which seems to mostly work.  

ISTR that there was something else that was odd but I'm sure somebody
else will jump in and mention it.

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