btrfs: backref: move btrfs_backref_(node|edge|cache) structures to backref.h

These 3 structures are the main part of btrfs backref cache, move them
to backref.h to build the basis for later reuse.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2020-03-23 15:03:56 +08:00 • committed by David Sterba
commit 7053544146
2 changed files with 116 additions and 113 deletions