Public bug reported: 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 ** Affects: qemu Importance: Undecided Status: New ** Affects: qemu (Fedora) Importance: Unknown Status: Unknown ** Bug watch added: Red Hat Bugzilla #1872918 https://bugzilla.redhat.com/show_bug.cgi?id=1872918 ** Also affects: qemu (Fedora) via https://bugzilla.redhat.com/show_bug.cgi?id=1872918 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1893667 Title: Btrfs commands don't work when using user-space emulation of other architectures Status in QEMU: New 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 To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1893667/+subscriptions
