Laurent, I am assuming that the commits here:
https://gitlab.com/qemu-project/qemu/-/commits/master?utf8=%E2%9C%93&search=Filip+Bozuta
are sufficient to mark this issue as Fix Committed. It looks like the
Downstream bug tracker for Fedora has marked the related bug as CLOSED
ERRATA already.
If I'm wrong, please reopen.
** Changed in: qemu
Status: In Progress => Fix Committed
** Changed in: qemu
Status: Fix Committed => In Progress
** Changed in: qemu
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1893667
Title:
Btrfs commands don't work when using user-space emulation of other
architectures
Status in QEMU:
Fix Committed
Status in qemu package in Fedora:
Unknown
Bug description:
Description of problem:
When doing cross-arch builds with mock, it uses qemu-user-static under the
hood, and qemu-user-static lacks support for Btrfs ioctls to emulate so that
btrfs(8) commands work correctly.
This is especially important for being able to do cross-arch image
builds.
How reproducible:
Always (on Fedora 33 with qemu-5.1.0-2.fc33)
Steps to Reproduce:
$ sudo dnf install mock qemu-user-static wget
$ sudo usermod -a -G mock $USER
$ newgrp mock
$ mock --root fedora-rawhide-armhfp --install btrfs-progs util-linux
$ mock --root fedora-rawhide-armhfp --chroot 'rm -f foo.img && dd
if=/dev/zero of=foo.img bs=1G count=1 && losetup /dev/loop9 foo.img &&
mkfs.btrfs /dev/loop9 && mkdir /foo && mount /dev/loop9 /foo && btrfs subvol
create /foo/subvol && umount /foo && losetup -d /dev/loop9'
Actual results:
Fails with errors like "ERROR: cannot create subvolume: Function not
implemented"
Expected results:
Succeeds and creates subvolumes properly.
Additional info:
There is a patch series from a few days ago to add support for many btrfs
ioctls which could fix this...
https://lists.gnu.org/archive/html/qemu-devel/2020-08/msg05594.html
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