btrfs-progs: extend balance args to take min/max limit filter

Add the overlapping limit and [limit_min, limit_max] members to the
balance args. The min/max values are interpreted iff the corresponding
flag BTRFS_BALANCE_ARGS_LIMIT_RANGE is set.

The minimum and maximum are inclusive.

Note that the values are only 32bit, but this should be enough for the
foreseeable future.

Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/volumes.h b/volumes.h
index eb434f1..b6ea191 100644
--- a/volumes.h
+++ b/volumes.h
@@ -136,6 +136,7 @@ struct map_lookup {
 #define BTRFS_BALANCE_ARGS_DRANGE	(1ULL << 3)
 #define BTRFS_BALANCE_ARGS_VRANGE	(1ULL << 4)
 #define BTRFS_BALANCE_ARGS_LIMIT	(1ULL << 5)
+#define BTRFS_BALANCE_ARGS_LIMIT_RANGE	(1ULL << 6)
 
 /*
  * Profile changing flags.  When SOFT is set we won't relocate chunk if