dm btree: add dm_btree_remove_leaves()
Removes a range of leaf values from the tree.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
diff --git a/drivers/md/persistent-data/dm-btree.h b/drivers/md/persistent-data/dm-btree.h
index dacfc34..11d8cf7 100644
--- a/drivers/md/persistent-data/dm-btree.h
+++ b/drivers/md/persistent-data/dm-btree.h
@@ -135,6 +135,15 @@
uint64_t *keys, dm_block_t *new_root);
/*
+ * Removes values between 'keys' and keys2, where keys2 is keys with the
+ * final key replaced with 'end_key'. 'end_key' is the one-past-the-end
+ * value. 'keys' may be altered.
+ */
+int dm_btree_remove_leaves(struct dm_btree_info *info, dm_block_t root,
+ uint64_t *keys, uint64_t end_key,
+ dm_block_t *new_root, unsigned *nr_removed);
+
+/*
* Returns < 0 on failure. Otherwise the number of key entries that have
* been filled out. Remember trees can have zero entries, and as such have
* no lowest key.