Fwd: mkuzip and/or geom_uzip changes?

[Tim Judd]

On 4/1/10, John Baldwin <jhb at freebsd.org> wrote:
> On Thursday 01 April 2010 10:48:07 am Tim Judd wrote:
>> On 4/1/10, John Baldwin <jhb at freebsd.org> wrote:
>> > On Wednesday 31 March 2010 6:32:09 pm Tim Judd wrote:
>> >> Hi All,
>> >>
>> >> Just starting to see if I can find other reports.  You all probably
>> >> have had the "more than one pair of eyes looking at a thing is better
>> >> than my eyes alone."  This is why I'm writing now, as I'm starting the
>> >> discovery.
>> >>
>> >> Let me background this a little bit.  I only started looking into this
>> >> because mkuzip and it's counterpart, geom_uzip are throwing errors on
>> >> FreeBSD8 i386
>> >>
>> >>
>> >> scenario (/etc/src.conf in effect, removing *LOTS* of stuff with
>> >> knobs):
>> >>   make DESTDIR=/home/small8 installworld installkernel distribution
>> >>   mv /home/small8/boot /home/small8-boot/
>> >>   makefs -t ffs /home/small8/usr.img /home/small8/usr/
>> >>   mkuzip -o /home/small8/usr.uzip /home/small8/usr.img
>> >> [*]
>> >>   chflags -R noschg /home/small8/usr/*
>> >>   rm -rf /home/small8/usr/* /home/small8/usr.img
>> >>   ee /home/small8/etc/rc.d/mountcritlocal
>> >>           [**]
>> >>   makefs -t ffs /home/small8-boot/mfsroot /home/small8/
>> >>   gzip --best /home/small8-boot/mfsroot
>> >>   ee /home/small8-boot/boot/loader.conf
>> >>           [***]
>> >>   rm /home/small8-boot/boot/kernel/*.symbols
>> >>   gzip --best /home/small8-boot/boot/kernel/kernel
>> >>   mkisofs -U -J -r -V "FreeBSD8" -b boot/cdboot -no-emul-boot
>> >> -iso-level 4 -o /home/small8.iso /home/small8-boot/
>> >>
>> >>
>> >> [*]: mkuzip inserts a script header that is broken.  module name it's
>> >> searching for may have been renamed?
>> >> [**]: Edited mountcritlocal to mount the usr.uzip file as by using the
>> >> above script header, throws errors
>> >> [***]: added zlib and geom_uzip modules to load to the boot image, to
>> >> satisfy the script header's requirements.
>> >>
>> >> OK, the above scenario creates about a 33MB usr.uzip, and a 68MB iso.
>> >> Small enough to apparently fit into the undocumented 50 or 100MB size
>> >> limit of mfs_root module
>> >
>> > BTW, you can raise this limit by changing NKPT.
>>
>>
>> I'm sorry, I'm not sure what you're referring to when you are telling me
>> this.
>
> If you increase NKPT (look in /sys/i386/conf/NOTES on a recent stable) you
> can use a larger mfs root.
>
>> >> 2) even with geom_uzip module and it's dependency zlib loaded, i don't
>> >> get a mdconfig node '/dev/md?.uzip' to appear.
>> >>
>> >> It's been forever since I touched uzip, so I have to ask.
>> >
>> > Do you have a md0 device at all?  I think you want to hack the script to
>> > do
>> > something like this:
>>
>> I double check at home tonight, but I don't remember any additional md
>> devices, since I'm running from an MFS_ROOT, i get md0, but that's
>> all.
>>
>> I definately do not get any /dev/md?.uzip files.  No .uzips show up.
>
> You will not get the uzip device until you create the md device via
> mdconfig -af.

And that was one of my troubleshooting attempts the other night.
Instead of relying on a (misdone) embedded script, I tried mdconfig
-at vnode -f; and a mdconfig -af;.  If I recall, they create a md?
node, but not a md?.uzip node.


No joy, I have been trying to grep source files seeing what might be
the problem of creating the md?.uzip, but I still haven't found the
code that does it.


Can you duplicate the issue?  I haven't gotten into trying to rebuild
world (without the src.conf exclusions).  I might be able to attempt
that tonight.


Thanks for your time, Mr. Baldwin.

>
>> > 	disk=`mdconfig -af /path/to/usr.img`
>> > 	mount -r /dev/$disk.uzip /usr
>
> That's why I think you need to add this to a script in /etc.  You could
> perhaps put the mount line in /etc/fstab, but you need to invoke mdconfig
> to create md1.  At that point you should get the md1.uzip device
> automatically.

That above script wouldn't give a devnode /dev/md?.uzip.  it's being
run manually at a single-user mode and it doesn't create the
/dev/md?.uzip node.  I will be doing all this this evening when I get
home.

>
> --
> John Baldwin
>