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Date:      Sun, 11 Oct 2015 20:21:30 -0700
From:      Adrian Chadd <adrian.chadd@gmail.com>
To:        Eugene Grosbein <egrosbein@rdtc.ru>
Cc:        "freebsd-mips@freebsd.org" <freebsd-mips@freebsd.org>
Subject:   Re: Some makefs(8) improvements
Message-ID:  <CAJ-Vmok2p_EiT8LF1DOc1%2BE5yXr4dcyU6UZ=S8Owi1Nh9shuxQ@mail.gmail.com>
In-Reply-To: <561ABE06.60905@rdtc.ru>
References:  <561ABE06.60905@rdtc.ru>

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Hi!

It looks fine to me as a stopgap measure. Sean, please do commit it
when you have some spare time. :)

Thanks!


-a


On 11 October 2015 at 12:52, Eugene Grosbein <egrosbein@rdtc.ru> wrote:
> Hi!
>
> While building my own FreeBSD/mips image for device having 8MB flash inly,
> I've faced two problems with makefs(8) utility.
>
> First, there is a bug in makefs: it fails to initialise fs_providersize
> in a superblock while making UFS file system. This leads to other problems
> with geom_label. The (trivial) patch is attached to the PR I just submited:
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203704
>
> Then, makefs is not quite compatible with mkulzma/geom_uncompress feature:
> geom_uncompress kernel module reports GEOM provider size rounded up to
> its compression block size. Generally, this changes original media size
> and now it fails to match the size of embedded UFS that  again
> leads to problems with geom_label kernel module. This module does not like
> the mismatch and skips the file system while tasting the GEOM and looking for
> UFS label.
>
> I've added new option "-r" to makefs to round up generated image to specified
> block size, f.e.:
>
> makefs -t ffs -r 65536 -o bsize=4096,fsize=512,label=flash optimization=space fs.img fs
>
> geom_uncompress does not change GEOM media size for images rounded that way
> and geom_label accepts such GEOMs just fine.
>
> The patch is attached to another PR I just submited:
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203707
>
> Hope there PRs won't hand around for years :-)
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