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-rw-r--r--fs/btrfs/ctree.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index e8b32641ea90..e7bea1d5f75f 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -3298,14 +3298,21 @@ static noinline int split_node(struct btrfs_trans_handle *trans,
*/
static int leaf_space_used(struct extent_buffer *l, int start, int nr)
{
+ struct btrfs_item *start_item;
+ struct btrfs_item *end_item;
+ struct btrfs_map_token token;
int data_len;
int nritems = btrfs_header_nritems(l);
int end = min(nritems, start + nr) - 1;
if (!nr)
return 0;
- data_len = btrfs_item_end_nr(l, start);
- data_len = data_len - btrfs_item_offset_nr(l, end);
+ btrfs_init_map_token(&token);
+ start_item = btrfs_item_nr(l, start);
+ end_item = btrfs_item_nr(l, end);
+ data_len = btrfs_token_item_offset(l, start_item, &token) +
+ btrfs_token_item_size(l, start_item, &token);
+ data_len = data_len - btrfs_token_item_offset(l, end_item, &token);
data_len += sizeof(struct btrfs_item) * nr;
WARN_ON(data_len < 0);
return data_len;