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Subject: [Bug 199407] mkuzip(8) verbosity change request to help with
 makefs(8) filesystems
Date: Mon, 13 Apr 2015 01:43:06 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=199407

            Bug ID: 199407
           Summary: mkuzip(8) verbosity change request to help with
                    makefs(8) filesystems
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: kwhite@site.uottawa.ca

Created attachment 155531
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=155531&action=edit
requested enhancements to mkuzip and makefs

After an Easter weekend's head scratching over a frustratingly
intermittent problem...

mkuzip's default verbosity level hides a message that might help
end users (me) when disk /dev/ufs/... labels on mkuzip filesystems
"mysteriously" don't appear at boot.  mkuzip provides useful messages
when "-v" is added, but they're lost amongst the noise.  I propose
adding verbosity levels: "-v" "-vv"

Patch for mkuzip(8) attached.  The mkulzma(8) derivative could be
modified similarly.

sys/geom/label/g_label_ufs.c expects well behaved filesystem sizes.
Unfortunately, mkuzip(8) may need to add some padding when compressing
a filesystem, and the provider size will then no longer match the
superblock.  Particularly for a makefs(8) filesystem.

One workaround for "file size is not multiple of XXXX, padding data"
would be for the user to specify a bsize the same as the intended
mkuzip blocksize.  e.g.:

        $ ZBLOCKSIZE=32768
        $ FSIZE=`expr $ZBLOCKSIZE / 8`
        $ LABEL="ALabel"
        $ makefs -o label="$LABEL" -o bsize=$ZBLOCKSIZE -o fsize=$FSIZE ...
        $ mkuzip -v -s $ZBLOCKSIZE ...

A patch (attached) for makefs(8) that pads the resulting filesystem
to fit on a mkuzip cluster_size boundary, might be useful as well.

        $ ZBLOCKSIZE=32768
        $ LABEL="ALabel"
        $ makefs -o label="$LABEL" -c $ZBLOCKSIZE ...
        $ mkuzip -v -s $ZBLOCKSIZE

...keith
~

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