btrfs: rename btrfs_data_ref->ino to ->objectid

This is how we refer to it in the rest of the extent reference related
code, make it consistent.
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/delayed-ref.c

@@ -983,7 +983,7 @@ static void init_delayed_ref_common(struct btrfs_fs_info *fs_info,
 	INIT_LIST_HEAD(&ref->add_list);
 
 	if (generic_ref->type == BTRFS_REF_DATA) {
-		ref->data_ref.objectid = generic_ref->data_ref.ino;
+		ref->data_ref.objectid = generic_ref->data_ref.objectid;
 		ref->data_ref.offset = generic_ref->data_ref.offset;
 	} else {
 		ref->tree_ref.level = generic_ref->tree_ref.level;
@@ -1014,7 +1014,7 @@ void btrfs_init_data_ref(struct btrfs_ref *generic_ref, u64 ino, u64 offset,
 	/* If @real_root not set, use @root as fallback */
 	generic_ref->real_root = mod_root ?: generic_ref->ref_root;
 #endif
-	generic_ref->data_ref.ino = ino;
+	generic_ref->data_ref.objectid = ino;
 	generic_ref->data_ref.offset = offset;
 	generic_ref->type = BTRFS_REF_DATA;
 	if (skip_qgroup || !(is_fstree(generic_ref->ref_root) &&

fs/btrfs/delayed-ref.h

@@ -226,7 +226,7 @@ struct btrfs_data_ref {
 	/* For EXTENT_DATA_REF */
 
 	/* Inode which refers to this data extent */
-	u64 ino;
+	u64 objectid;
 
 	/*
 	 * file_offset - extent_offset

fs/btrfs/ref-verify.c

@@ -688,7 +688,7 @@ int btrfs_ref_tree_mod(struct btrfs_fs_info *fs_info,
 		owner = generic_ref->tree_ref.level;
 	} else if (!parent) {
 		ref_root = generic_ref->ref_root;
-		owner = generic_ref->data_ref.ino;
+		owner = generic_ref->data_ref.objectid;
 		offset = generic_ref->data_ref.offset;
 	}
 	metadata = owner < BTRFS_FIRST_FREE_OBJECTID;