Re: Unable to build cdrom: failed to setup loop device

[Adolf Belka <adolf.belka@ipfire.org>]

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Hi Robin,

On 04/09/2024 20:53, Robin Roevens wrote:
> Hi all
>
> While trying to build ipfire, which always has worked quite effortless,
> it now fails while building cdrom:
>
> ---
>      # Create the EFI Eltorito image
>      dd if=/dev/zero of=/tmp/cdrom/boot/isolinux/efiboot.img bs=1k
> count=2880
>      2880+0 records in
>      2880+0 records out
>      2949120 bytes (2.9 MB, 2.8 MiB) copied, 0.00453183 s, 651 MB/s
>      mkdosfs -F 12 -n "IPFIRE_EFI" /tmp/cdrom/boot/isolinux/efiboot.img
>      mkfs.fat 4.2 (2021-01-31)
>      # Mount the EFI image
>      mkdir -pv /tmp/efiboot.img
>      mkdir: created directory '/tmp/efiboot.img'
>      mount -o loop /tmp/cdrom/boot/isolinux/efiboot.img /tmp/efiboot.img
>      mount: /tmp/efiboot.img: failed to setup loop device for
> /tmp/cdrom/boot/isolinux/efiboot.img.
>      make: *** [cdrom:184: /usr/src/log/cdrom] Error 32
>      make: Leaving directory '/usr/src/lfs'
>
> ERROR: Building cdrom
> [ FAIL ]
>      Check /home/robin/src/ipfire-sandbox/ipfire-
> 2.x/log_x86_64/_build.ipfire.log for errors if applicable
> [ FAIL ]
> ---
>
> The logfile has no extra or new information.
>
> When I manually try those steps, as root (as make.sh is also ran as
> root (using sudo)), they work correctly, and I'm able to successfully
> mount the image.
>
> ---
> $ sudo dd if=/dev/zero of=./efiboot.img bs=1k count=2880
> 2880+0 records gelezen
> 2880+0 records geschreven
> 2949120 bytes (2,9 MB, 2,8 MiB) gekopieerd, 0,0130511 s, 226 MB/s
> $ sudo ./build/sbin/mkdosfs -F 12 -n "IPFIRE_EFI" ./efiboot.img
> mkfs.fat 4.2 (2021-01-31)
> $ sudo mkdir ./efi
> $ sudo mount -o loop ./efiboot.img ./efi
> $ df -h ./efi
> Bestandssysteem Grootte Gebruikt Besch Geb% Aangekoppeld op
> /dev/loop15        2,8M        0  2,8M   0% /home/robin/src/ipfire-
> sandbox/ipfire-2.x/efi
> ---
>
> So I'm unsure as of why the build fails setting up the loop device.
> I did a ./make.sh clean, but that didn't solve it.
>
> If I try to mount the loop device as unprivileged user, I get the exact
> same error. But the build process is ran as root, so that should also
> not be the problem?
>
> Has anyone an idea what could be wrong here? or give me some guidelines
> on how to debug this ?
> I've read there where changes to the inner workings of the build
> system, could those be the cause ? I assume not as then I would have
> seen others complain about it here?

There were a couple of users who had problems with the new build system which were due to the kernel version they were running with their OS's.

I didn't see any problems but I am running everything on Arch Linux so it always has the latest kernel version.

What OS are you running for your build system and what is the kernel version in it?

Those things may help @Michael to figure out what the issue is.

Regards,

Adolf.

> Robin