On Wed, Dec 21, 2022, at 12:00 PM, Lennart Poettering wrote: > On Mi, 21.12.22 10:03, Gerd Hoffmann (kraxel@xxxxxxxxxx) wrote: > >> For the general case we need some other option. Could be just stick to >> grub2 for those cases (we'll continue to need grub2 anyway for bios boot >> and ppc64le). Or drop an ext4 driver to /boot/efi/EFI/systemd/drivers, >> for example this one: >> https://github.com/tianocore/edk2-platforms/tree/master/Features/Ext4Pkg > > I am pretty strongly against the idea of ext4 for /boot/. > > First of all, the firmware can't read it natively, but what's worse, > uefi cannot even make sense of any of the features it provides above > vfat. i.e. file ownership, access modes, ACLs, selinux labels, xattrs, > symlinks, … are all complete nonsense to the UEFI fs layer (and to > boot loaders that natively implement the fs drivers, the same). The > UEFI fs API has no concepts for *any* of these features. Hence, if > this is supposed to carry data intended for consumption by the boot > loader, why the f**k would you use a file system it cannot even > remotely take benefit of? And for btrfs, the GRUB btrfs.mod doesn't do any checksum checking at all, so there's not even an incremental improvement to integrity, let alone any support for fs-verity. So while I like btrfs for /boot due to the space efficiency advantage (I don't have to ask how big boot should be, no space is wasted and I don't run out either), I'm willing to give it up for practical matters like simplicity and reduced attack and maintenance surface area. -- Chris Murphy _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
