Btrfs: virtual address space subset filter

Select chunks which have at least one byte located inside a given
[vstart, vend) virtual address space range.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 844b08e388f2..eac26c359312 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -203,6 +203,7 @@ struct map_lookup {
 #define BTRFS_BALANCE_ARGS_USAGE        (1ULL << 1)
 #define BTRFS_BALANCE_ARGS_DEVID        (1ULL << 2)
 #define BTRFS_BALANCE_ARGS_DRANGE       (1ULL << 3)
+#define BTRFS_BALANCE_ARGS_VRANGE       (1ULL << 4)
 
 struct btrfs_balance_args;
 struct btrfs_balance_control {