[uml-devel] Re: Bug#254665: uml-utilities: uml_moo produces broken images (short one block)

[uml-devel] Re: Bug#254665: uml-utilities: uml_moo produces broken images (short one block)

[Matt Zimmerman]

On Wed, Jun 16, 2004 at 06:22:37PM +1000, Alexander Zangerl wrote:
> Package: uml-utilities
> Version: 20020415-3
> Severity: normal
> 
> i've got some ext2 fs images, normal cow-files, and the need to recombine them.
> but the resulting file is one 1k-block shorter than the original, and doesn't
> work at all. the original images were sparse (but that shouldn't make any
> difference, IMHO).
> 
> the original image is 102401024 bytes (1024x100001),
> as e2fsdump sees it:
> 
> Filesystem volume name:   <none>
> Last mounted on:          <not available>
> Filesystem UUID:          7ae0f33e-3b48-4a97-b8eb-8ecdb21dabfe
> Filesystem magic number:  0xEF53
> Filesystem revision #:    1 (dynamic)
> Filesystem features:      filetype sparse_super
> Filesystem state:         clean
> Errors behavior:          Continue
> Filesystem OS type:       Linux
> Inode count:              25064
> Block count:              100001
> Reserved block count:     5000
> Free blocks:              87105
> Free inodes:              18818
> First block:              1
> Block size:               1024
> Fragment size:            1024
> Blocks per group:         8192
> Fragments per group:      8192
> Inodes per group:         1928
> Inode blocks per group:   241
> Last mount time:          Tue Jun 15 18:49:46 2004
> Last write time:          Tue Jun 15 18:50:09 2004
> Mount count:              2
> Maximum mount count:      25
> Last checked:             Tue Jun 15 17:51:20 2004
> Check interval:           15552000 (6 months)
> Next check after:         Sun Dec 12 17:51:20 2004
> Reserved blocks uid:      0 (user root)
> Reserved blocks gid:      0 (group root)
> First inode:              11
> Inode size:               128
> 
> the broken result of uml_moo is 102400000 bytes (1024x100000),
> and e2fsdump gives exaclty the same output as before for the superblock.
> 
> (judicious application of dd if=/dev/zero >> the broken result seems to
> make the image work, but that appears to be only because the area wasn't used
> in the original image.)
> 
> if there is more info required let me know.
> 
> regards
> az
> 
> 
> -- System Information
> Debian Release: 3.0
> Architecture: i386
> Kernel: Linux cluon 2.4.26 #1 Fri Apr 16 12:21:48 EST 2004 i686
> Locale: LANG=C, LC_CTYPE=de_AT
> 
> Versions of packages uml-utilities depends on:
> ii  libc6                     2.3.2-9        GNU C Library: Shared libraries an
> ii  libncurses5               5.3.20030719-1 Shared libraries for terminal hand
> ii  libreadline4              4.3-8          GNU readline and history libraries
> 

-- 
 - mdz


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Re: [uml-devel] Re: Bug#254665: uml-utilities: uml_moo produces broken images (short one block)

[Matt Zimmerman]

On Tue, Jun 29, 2004 at 05:41:47PM +0200, BlaisorBlade wrote:

> Alle 03:04, lunedì 28 giugno 2004, Matt Zimmerman ha scritto:
> > On Wed, Jun 16, 2004 at 06:22:37PM +1000, Alexander Zangerl wrote:
> > > Package: uml-utilities
> > > Version: 20020415-3
> SO old?
> > > Severity: normal
> 
> > > i've got some ext2 fs images, normal cow-files, and the need to recombine
> > > them. but the resulting file is one 1k-block shorter than the original,
> 
> One question: since that bug is repeatable, could you try updating your 
> uml-utilites? I don't have the sources for those ones (if the "2002" is 
> correct). At http://user-mode-linux.sourceforge.net/dl-ists.html you can find 
> later ones.

Version 20040406 is available in Debian testing and unstable.  20020415 is
from Debian stable (woody), released July 2002.

-- 
 - mdz


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Re: [uml-devel] Re: Bug#254665: uml-utilities: uml_moo produces broken images (short one block)

[BlaisorBlade]

Alle 03:04, lunedì 28 giugno 2004, Matt Zimmerman ha scritto:
> On Wed, Jun 16, 2004 at 06:22:37PM +1000, Alexander Zangerl wrote:
> > Package: uml-utilities
> > Version: 20020415-3
SO old?
> > Severity: normal

> > i've got some ext2 fs images, normal cow-files, and the need to recombine
> > them. but the resulting file is one 1k-block shorter than the original,

One question: since that bug is repeatable, could you try updating your 
uml-utilites? I don't have the sources for those ones (if the "2002" is 
correct). At http://user-mode-linux.sourceforge.net/dl-ists.html you can find 
later ones. Note: don't replace the old ones if you have a old UML binary, 
since newer utilities could not work with it (but you're strongly suggested 
to upgrade to 2.4.24-1um Uml kernel, not more since newer patches have bugs).

If the bug shows up again, I have one question: I need to know if, on the fs 
holding the image, the block size is 1k? The size to use for COW blocks is 
read from the filesystem.

> > and doesn't work at all. the original images were sparse (but that
> > shouldn't make any difference, IMHO).
Yes, that cannot make difference.
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729




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