bcachefs: Add version check for bch_btree_ptr_v2.sectors_written validate

A user popped up with a very old (0.11) filesystem that needed repair
and wasn't recently backed up.

Reported-by: Manoa <manoa@mail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-10-20 19:02:44 -04:00
commit e0c8369bc8