bcachefs: Lookup/create lost+found lazily

This is prep work for subvolumes - each subvolume will have its own
lost+found.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2021-04-19 22:19:18 -04:00 • committed by Kent Overstreet
commit 58686a259e