bcachefs: Add code to scan for/rewite old btree nodes

This adds a new data job type to scan for btree nodes in the old extent
format, and rewrite them.

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 2021-03-14 19:01:14 -04:00 • committed by Kent Overstreet
commit 1889ad5a12
8 changed files with 132 additions and 38 deletions