diff options
Diffstat (limited to 'kernel/drivers/md/persistent-data/dm-btree.h')
| -rw-r--r-- | kernel/drivers/md/persistent-data/dm-btree.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/kernel/drivers/md/persistent-data/dm-btree.h b/kernel/drivers/md/persistent-data/dm-btree.h index dacfc3418..c74301fa5 100644 --- a/kernel/drivers/md/persistent-data/dm-btree.h +++ b/kernel/drivers/md/persistent-data/dm-btree.h @@ -110,6 +110,13 @@ int dm_btree_lookup(struct dm_btree_info *info, dm_block_t root, uint64_t *keys, void *value_le); /* + * Tries to find the first key where the bottom level key is >= to that + * given. Useful for skipping empty sections of the btree. + */ +int dm_btree_lookup_next(struct dm_btree_info *info, dm_block_t root, + uint64_t *keys, uint64_t *rkey, void *value_le); + +/* * Insertion (or overwrite an existing value). O(ln(n)) */ int dm_btree_insert(struct dm_btree_info *info, dm_block_t root, @@ -135,6 +142,16 @@ int dm_btree_remove(struct dm_btree_info *info, dm_block_t root, uint64_t *keys, dm_block_t *new_root); /* + * Removes a _contiguous_ run of values starting from 'keys' and not + * reaching 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. |