[bug #59976] f2fs module appears not to handle extra_attr

[Paul Gover]

URL:
  <https://savannah.gnu.org/bugs/?59976>

                 Summary: f2fs module appears not to handle extra_attr
                 Project: GNU GRUB
            Submitted by: goverp
            Submitted on: Sat 30 Jan 2021 01:00:21 PM UTC
                Category: Filesystem
                Severity: Major
                Priority: 5 - Normal
              Item Group: Software Error
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Paul Gover
        Originator Email: pmw.gover@yahoo.co.uk
             Open/Closed: Open
                 Release: 
                 Release: 2.00
         Discussion Lock: Any
         Reproducibility: Every Time
         Planned Release: None

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Details:

I've grub 2.04 (which isn't in the bugzilla list) installed on two linux
EFI/GPT machines, both with rootfs=f2fs.

On one, grub-install worked fine, and grub works fine; the grub command line
shows it's prefix is (hd6,gpt1)/boot/grub, which is in the f2fs partition. 
It's loading stuff (grub.cfg and so forth) no problem.

The other, grub-install appeared to work OK, but grub goes to the recovery
prompt.  If I ls (hd0,gpt5), the f2fs partition containing /boot/grub, it says
"f2fs filesystem", but if I ls (hd0,gpt5)/ I get a string of gibberish output,
not directories.

It used to work until I reformatted the partition to support extra options -
particularly its new checksums.  That required a format option "extra_attr",
which I suspect means they've changed the size or layout of one of their
control blocks, and it looks to me like that's broken grub's f2fs module.




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