Mounting devfs over to ZFS from fstab fails

[Vince]

Attila Nagy wrote:
> Hello,
> 
> I have some jails running on ZFS, so I have to mount devfs's into them.
> 
> For this purpose, I have some similar lines in /etc/fstab:
> devfs   /pool/jail/ldap/dev           devfs   rw      0       0
> 
> Where /pool is a ZFS filesystem.
> 
I'm not sure if it will have any adverse effects but changing this to
devfs   /pool/jail/ldap/dev           devfs   rw,late      0       0

Will probably fix it. My guess is that the error checking correction in 
the latest version in -stable picked up an error that was being 
incorrectly ignored before.
see
http://www.freebsd.org/cgi/cvsweb.cgi/src/etc/rc.d/mountcritlocal.diff?only_with_tag=RELENG_7&r1=text&tr1=1.14.2.2&r2=text&tr2=1.14
which i believe is the MFC for
http://www.freebsd.org/cgi/getmsg.cgi?fetch=1314016+1316331+/usr/local/www/db/text/2008/cvs-all/20080309.cvs-all

Although I cant seen a commit message in cvsweb (i'm still learning that 
though :)


Vince

> This has worked until today -when I upgraded from a previous 7-STABLE 
> (FreeBSD 7.0-STABLE #16: Fri Mar  7 14:30:08 CET 2008) to today's 
> STABLE- but not anymore.
> 
> The boot process fails with something like WARNING: $true wasn't set, 
> see man rc.conf (or something similar, I don't have the exact error 
> message, but I can reproduce if it's needed), and the problem is that 
> the rc scripts try to mount the devfs (and nullfs) stuff to the yet 
> unmounted ZFS, so /pool/jail/ldap/dev doesn't exist.
> 
> If I create them on the root filesystem, the OS boots up fine, but of 
> course I don't have the devfs's mounted onto ZFS, they are beneath it 
> (umount and mount -a solves the issue). There is a similar problem with 
> nullfs's as well.
> 
> AFAIK only the following has been changed in rc.d:
> ./dhclient
> ./mountcritlocal
> ./mountlate
> 
> neither of them seems to be able to produce this kind of malfunction.
> 
> Any ideas?
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