From mboxrd@z Thu Jan 1 00:00:00 1970 From: Felix Blanke Subject: Re: Bug in mkfs.btrfs?! Date: Mon, 24 Jan 2011 22:14:21 +0100 Message-ID: <20110124211421.GC2554@scooter> References: <4D3CA568.7050506@libero.it> <20110124130104.GA7354@scooter> <20110124131341.GA3403@carfax.org.uk> <20110124135305.GB7354@scooter> <20110124142936.GB3403@carfax.org.uk> <20110124143448.GC3403@carfax.org.uk> <20110124144414.GD7354@scooter> <20110124165258.GA2562@scooter> <20110124170023.GA7576@carfax.org.uk> <20110124210454.GB2554@scooter> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-btrfs@vger.kernel.org To: Hugo Mills Return-path: In-Reply-To: <20110124210454.GB2554@scooter> List-ID: If gentoo is configured for using loop-aes, a patch is applied: http://loop-aes.sourceforge.net/updates/util-linux-ng-2.17.1-20100308.diff.bz2 Debian doesn't seem to apply that patch, therefore I'm getting that ioctl error and can't loop my encrypted devices. Now everything does make sense :) The difference is somewhere in that patch. It's a huge one. Maybe I'll talk to the loop-aes maintainer (I'm subscribed to that list) and try to deep into that. It is def. not a btrfs related problem. If anyone wants to keep on track with my investigation just let me now, otherwise I'll stop posting about this in the btrfs-list. Thanks for your help! Felix On 24. January 2011 - 22:04, Felix Blanke wrote: > Date: Mon, 24 Jan 2011 22:04:54 +0100 > From: Felix Blanke > To: Hugo Mills > Cc: linux-btrfs@vger.kernel.org > Subject: Re: Bug in mkfs.btrfs?! > > 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 > > To: Felix Blanke > > Cc: linux-btrfs@vger.kernel.org > > Subject: Re: Bug in mkfs.btrfs?! > > Mail-Followup-To: Hugo Mills , Felix Blanke > > , linux-btrfs@vger.kernel.org > > > > 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 > > > > To: Hugo Mills > > > > Cc: kreijack@inwind.it, linux-btrfs@vger.kernel.org > > > > 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--- ---end quoted text---