Hi,
it is getting interesting :)
If I'm using the debian util-linux (with the patches) I'm getting an error while
executing losetup:
ioctl: LOOP_SET_STATUS: Invalid argument
Now the interesting part: The strace of the debian util-linux shows:
readlink("/dev", 0x7fffcea2a0a0, 4096) = -1 EINVAL (Invalid argument)
readlink("/dev/disk", 0x7fffcea2a0a0, 4096) = -1 EINVAL (Invalid argument)
readlink("/dev/disk/by-id", 0x7fffcea2a0a0, 4096) = -1 EINVAL (Invalid argument)
readlink("/dev/disk/by-id/ata-WDC_WD6400AAKS-22A7B2_WD-WCASY7780706-part3",
"../../sda3", 4096) = 10
readlink("/dev/sda3", 0x7fffcea2a0a0, 4096) = -1 EINVAL (Invalid argument)
But in the gentoo util-linux there is no readlink in the strace. There are also those
readlinks with the unpatched source from that debian package.
If I use the tarball of gentoo and compile it by my own there are readlinks. I'll
take a look if there are any gentoo-patches applied during the build.
Felix
On 24. January 2011 - 17:00, Hugo Mills wrote:
> Date: Mon, 24 Jan 2011 17:00:24 +0000
> From: Hugo Mills <hugo-lkml@xxxxxxxxxxxxx>
> To: Felix Blanke <felixblanke@xxxxxxxxx>
> Cc: linux-btrfs@xxxxxxxxxxxxxxx
> Subject: Re: Bug in mkfs.btrfs?!
> Mail-Followup-To: Hugo Mills <hugo-lkml@xxxxxxxxxxxxx>, Felix Blanke
> <felixblanke@xxxxxxxxx>, linux-btrfs@xxxxxxxxxxxxxxx
>
> On Mon, Jan 24, 2011 at 05:52:58PM +0100, Felix Blanke wrote:
> > util-linux-2.18-r1 and still no symlink following.
> >
> > I'll ask for that at the kernel mailing list in the next days. If your (Hugo)
> > util-linux doesn't include any kind of patches that behaviour is really strange.
>
> Just for reference:
>
> Package description page:
> http://packages.debian.org/squeeze/util-linux
>
> Original upstream sources Debian are using:
> http://ftp.de.debian.org/debian/pool/main/u/util-linux/util-linux_2.17.2.orig.tar.gz
>
> Debian patches on top of that source (mostly to the build system):
> http://ftp.de.debian.org/debian/pool/main/u/util-linux/util-linux_2.17.2-5.diff.gz
>
> Hugo.
>
> >
> > Felix
> >
> > On 24. January 2011 - 15:44, Felix Blanke wrote:
> > > Date: Mon, 24 Jan 2011 15:44:14 +0100
> > > From: Felix Blanke <felixblanke@xxxxxxxxx>
> > > To: Hugo Mills <hugo-lkml@xxxxxxxxxxxxx>
> > > Cc: kreijack@xxxxxxxxx, linux-btrfs@xxxxxxxxxxxxxxx
> > > Subject: Re: Bug in mkfs.btrfs?!
> > >
> > > > On Mon, Jan 24, 2011 at 02:29:36PM +0000, Hugo Mills wrote:
> > > > > If, instead, the initial losetup call tracked the symlinks back to
> > > > > the original device node (i.e. something like "/dev/sdb3", or
> > > > > "/dev/mapper/ruthven-btest" in my example), then the name that's
> > > > > stored in the kernel would be shorter, and we'd be less likely to see
> > > > > the truncation. This is what my copy of losetup seems to be doing. I
> > > > > can't see any distribution-specific patches in the source for
> > > > > util-linux that would do this, though.
> > > >
> > > > Hmm... Just had a thought: is
> > > > /dev/disk/by-id/ata-INTEL_SSDSA2M160G2GC_CVPO939201JX160AGN-part3 on
> > > > your system a symlink or a device node? What does ls -l say?
> > >
> > > It is a symlink created by udev:
> > >
> > > ls -l /dev/disk/by-id/ata-INTEL_SSDSA2M160G2GC_CVPO939201JX160AGN-part3
> > > lrwxrwxrwx 1 root root 10 Jan 23 23:39
> > > /dev/disk/by-id/ata-INTEL_SSDSA2M160G2GC_CVPO939201JX160AGN-part3 -> ../../sdb3
> > >
> > > Following that link should work :)
> > >
> > >
> > > Felix
> > >
> > > >
> > > > Hugo.
> > > >
>
> --
> === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
> PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk
> --- Turning, pages turning in the widening bath, / The spine ---
> cannot bear the humidity. / Books fall apart; the binding
> cannot hold. / Page 129 is loosed upon the world.
---end quoted text---
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