From 4e7f1f9089660aec3b5ab2645ce62777c6f4c6a2 Mon Sep 17 00:00:00 2001 From: Joe Thornber Date: Fri, 1 Mar 2013 22:45:50 +0000 Subject: dm persistent data: add btree_walk Add dm_btree_walk to iterate through the contents of a btree. This will be used by the dm cache target. Signed-off-by: Joe Thornber Signed-off-by: Alasdair G Kergon --- drivers/md/persistent-data/dm-btree-spine.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers/md/persistent-data/dm-btree-spine.c') diff --git a/drivers/md/persistent-data/dm-btree-spine.c b/drivers/md/persistent-data/dm-btree-spine.c index f199a0c4ed04..cf9fd676ae44 100644 --- a/drivers/md/persistent-data/dm-btree-spine.c +++ b/drivers/md/persistent-data/dm-btree-spine.c @@ -164,6 +164,13 @@ int ro_step(struct ro_spine *s, dm_block_t new_child) return r; } +void ro_pop(struct ro_spine *s) +{ + BUG_ON(!s->count); + --s->count; + unlock_block(s->info, s->nodes[s->count]); +} + struct btree_node *ro_node(struct ro_spine *s) { struct dm_block *block; -- cgit v1.2.3