btrfs-progs: check: introduce function to check data backref in extent tree

Introduce a new function check_data_extent_item() to check if the
corresponding data backref exists in extent tree.

Signed-off-by: Lu Fengqi <lufq.fnst@cn.fujitsu.com>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/ctree.h b/ctree.h
index 5cb5533a..dda72d0e 100644
--- a/ctree.h
+++ b/ctree.h
@@ -2364,6 +2364,8 @@ int exclude_super_stripes(struct btrfs_root *root,
 			  struct btrfs_block_group_cache *cache);
 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
 		       struct btrfs_fs_info *info, u64 start, u64 end);
+u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
+
 /* ctree.c */
 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,