btrfs: rename btrfs_put_fs_root and btrfs_grab_fs_root

We are now using these for all roots, rename them to btrfs_put_root()
and btrfs_grab_root();
Reviewed-by: NNikolay Borisov <nborisov@suse.com>
Signed-off-by: NJosef Bacik <josef@toxicpanda.com>
Reviewed-by: NDavid Sterba <dsterba@suse.com>
Signed-off-by: NDavid Sterba <dsterba@suse.com>

fs/btrfs/backref.c

@@ -577,7 +577,7 @@ static int resolve_indirect_ref(struct btrfs_fs_info *fs_info,
 	ret = add_all_parents(root, path, parents, ref, level, time_seq,
 			      extent_item_pos, total_refs, ignore_offset);
 out:
-	btrfs_put_fs_root(root);
+	btrfs_put_root(root);
 out_free:
 	path->lowest_level = 0;
 	btrfs_release_path(path);

fs/btrfs/disk-io.c

@@ -1309,7 +1309,7 @@ struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
 		free_extent_buffer(root->commit_root);
 		free_extent_buffer(leaf);
 	}
-	btrfs_put_fs_root(root);
+	btrfs_put_root(root);
 
 	return ERR_PTR(ret);
 }
@@ -1340,7 +1340,7 @@ static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans,
 	leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID,
 			NULL, 0, 0, 0);
 	if (IS_ERR(leaf)) {
-		btrfs_put_fs_root(root);
+		btrfs_put_root(root);
 		return ERR_CAST(leaf);
 	}
 
@@ -1443,7 +1443,7 @@ struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root,
 	return root;
 
 find_fail:
-	btrfs_put_fs_root(root);
+	btrfs_put_root(root);
 alloc_fail:
 	root = ERR_PTR(ret);
 	goto out;
@@ -1509,7 +1509,7 @@ static struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info,
 	root = radix_tree_lookup(&fs_info->fs_roots_radix,
 				 (unsigned long)root_id);
 	if (root)
-		root = btrfs_grab_fs_root(root);
+		root = btrfs_grab_root(root);
 	spin_unlock(&fs_info->fs_roots_radix_lock);
 	return root;
 }
@@ -1528,7 +1528,7 @@ int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info,
 				(unsigned long)root->root_key.objectid,
 				root);
 	if (ret == 0) {
-		btrfs_grab_fs_root(root);
+		btrfs_grab_root(root);
 		set_bit(BTRFS_ROOT_IN_RADIX, &root->state);
 	}
 	spin_unlock(&fs_info->fs_roots_radix_lock);
@@ -1549,8 +1549,8 @@ void btrfs_check_leaked_roots(struct btrfs_fs_info *fs_info)
 			  root->root_key.objectid, root->root_key.offset,
 			  refcount_read(&root->refs));
 		while (refcount_read(&root->refs) > 1)
-			btrfs_put_fs_root(root);
-		btrfs_put_fs_root(root);
+			btrfs_put_root(root);
+		btrfs_put_root(root);
 	}
 #endif
 }
@@ -1566,15 +1566,15 @@ void btrfs_free_fs_info(struct btrfs_fs_info *fs_info)
 	btrfs_free_ref_cache(fs_info);
 	kfree(fs_info->balance_ctl);
 	kfree(fs_info->delayed_root);
-	btrfs_put_fs_root(fs_info->extent_root);
-	btrfs_put_fs_root(fs_info->tree_root);
-	btrfs_put_fs_root(fs_info->chunk_root);
-	btrfs_put_fs_root(fs_info->dev_root);
-	btrfs_put_fs_root(fs_info->csum_root);
-	btrfs_put_fs_root(fs_info->quota_root);
-	btrfs_put_fs_root(fs_info->uuid_root);
-	btrfs_put_fs_root(fs_info->free_space_root);
-	btrfs_put_fs_root(fs_info->fs_root);
+	btrfs_put_root(fs_info->extent_root);
+	btrfs_put_root(fs_info->tree_root);
+	btrfs_put_root(fs_info->chunk_root);
+	btrfs_put_root(fs_info->dev_root);
+	btrfs_put_root(fs_info->csum_root);
+	btrfs_put_root(fs_info->quota_root);
+	btrfs_put_root(fs_info->uuid_root);
+	btrfs_put_root(fs_info->free_space_root);
+	btrfs_put_root(fs_info->fs_root);
 	btrfs_check_leaked_roots(fs_info);
 	kfree(fs_info->super_copy);
 	kfree(fs_info->super_for_commit);
@@ -1592,29 +1592,29 @@ struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info,
 	int ret;
 
 	if (location->objectid == BTRFS_ROOT_TREE_OBJECTID)
-		return btrfs_grab_fs_root(fs_info->tree_root);
+		return btrfs_grab_root(fs_info->tree_root);
 	if (location->objectid == BTRFS_EXTENT_TREE_OBJECTID)
-		return btrfs_grab_fs_root(fs_info->extent_root);
+		return btrfs_grab_root(fs_info->extent_root);
 	if (location->objectid == BTRFS_CHUNK_TREE_OBJECTID)
-		return btrfs_grab_fs_root(fs_info->chunk_root);
+		return btrfs_grab_root(fs_info->chunk_root);
 	if (location->objectid == BTRFS_DEV_TREE_OBJECTID)
-		return btrfs_grab_fs_root(fs_info->dev_root);
+		return btrfs_grab_root(fs_info->dev_root);
 	if (location->objectid == BTRFS_CSUM_TREE_OBJECTID)
-		return btrfs_grab_fs_root(fs_info->csum_root);
+		return btrfs_grab_root(fs_info->csum_root);
 	if (location->objectid == BTRFS_QUOTA_TREE_OBJECTID)
-		return btrfs_grab_fs_root(fs_info->quota_root) ?
+		return btrfs_grab_root(fs_info->quota_root) ?
 			fs_info->quota_root : ERR_PTR(-ENOENT);
 	if (location->objectid == BTRFS_UUID_TREE_OBJECTID)
-		return btrfs_grab_fs_root(fs_info->uuid_root) ?
+		return btrfs_grab_root(fs_info->uuid_root) ?
 			fs_info->uuid_root : ERR_PTR(-ENOENT);
 	if (location->objectid == BTRFS_FREE_SPACE_TREE_OBJECTID)
-		return btrfs_grab_fs_root(fs_info->free_space_root) ?
+		return btrfs_grab_root(fs_info->free_space_root) ?
 			fs_info->free_space_root : ERR_PTR(-ENOENT);
 again:
 	root = btrfs_lookup_fs_root(fs_info, location->objectid);
 	if (root) {
 		if (check_ref && btrfs_root_refs(&root->root_item) == 0) {
-			btrfs_put_fs_root(root);
+			btrfs_put_root(root);
 			return ERR_PTR(-ENOENT);
 		}
 		return root;
@@ -1657,10 +1657,10 @@ struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info,
 	 * we have the third for returning it, and the caller will put it when
 	 * it's done with the root.
 	 */
-	btrfs_grab_fs_root(root);
+	btrfs_grab_root(root);
 	ret = btrfs_insert_fs_root(fs_info, root);
 	if (ret) {
-		btrfs_put_fs_root(root);
+		btrfs_put_root(root);
 		if (ret == -EEXIST) {
 			btrfs_free_fs_root(root);
 			goto again;
@@ -2062,7 +2062,7 @@ void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info)
 		} else {
 			free_extent_buffer(gang[0]->node);
 			free_extent_buffer(gang[0]->commit_root);
-			btrfs_put_fs_root(gang[0]);
+			btrfs_put_root(gang[0]);
 		}
 	}
 
@@ -2270,12 +2270,12 @@ static int btrfs_replay_log(struct btrfs_fs_info *fs_info,
 	if (IS_ERR(log_tree_root->node)) {
 		btrfs_warn(fs_info, "failed to read log tree");
 		ret = PTR_ERR(log_tree_root->node);
-		btrfs_put_fs_root(log_tree_root);
+		btrfs_put_root(log_tree_root);
 		return ret;
 	} else if (!extent_buffer_uptodate(log_tree_root->node)) {
 		btrfs_err(fs_info, "failed to read log tree");
 		free_extent_buffer(log_tree_root->node);
-		btrfs_put_fs_root(log_tree_root);
+		btrfs_put_root(log_tree_root);
 		return -EIO;
 	}
 	/* returns with log_tree_root freed on success */
@@ -2284,7 +2284,7 @@ static int btrfs_replay_log(struct btrfs_fs_info *fs_info,
 		btrfs_handle_fs_error(fs_info, ret,
 				      "Failed to recover log tree");
 		free_extent_buffer(log_tree_root->node);
-		btrfs_put_fs_root(log_tree_root);
+		btrfs_put_root(log_tree_root);
 		return ret;
 	}
 
@@ -3884,7 +3884,7 @@ void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info,
 	radix_tree_delete(&fs_info->fs_roots_radix,
 			  (unsigned long)root->root_key.objectid);
 	if (test_and_clear_bit(BTRFS_ROOT_IN_RADIX, &root->state))
-		btrfs_put_fs_root(root);
+		btrfs_put_root(root);
 	spin_unlock(&fs_info->fs_roots_radix_lock);
 
 	if (btrfs_root_refs(&root->root_item) == 0)
@@ -3895,7 +3895,7 @@ void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info,
 		if (root->reloc_root) {
 			free_extent_buffer(root->reloc_root->node);
 			free_extent_buffer(root->reloc_root->commit_root);
-			btrfs_put_fs_root(root->reloc_root);
+			btrfs_put_root(root->reloc_root);
 			root->reloc_root = NULL;
 		}
 	}
@@ -3919,7 +3919,7 @@ void btrfs_free_fs_root(struct btrfs_root *root)
 	free_extent_buffer(root->commit_root);
 	kfree(root->free_ino_ctl);
 	kfree(root->free_ino_pinned);
-	btrfs_put_fs_root(root);
+	btrfs_put_root(root);
 }
 
 int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info)
@@ -3949,7 +3949,7 @@ int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info)
 				continue;
 			}
 			/* grab all the search result for later use */
-			gang[i] = btrfs_grab_fs_root(gang[i]);
+			gang[i] = btrfs_grab_root(gang[i]);
 		}
 		srcu_read_unlock(&fs_info->subvol_srcu, index);
 
@@ -3960,7 +3960,7 @@ int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info)
 			err = btrfs_orphan_cleanup(gang[i]);
 			if (err)
 				break;
-			btrfs_put_fs_root(gang[i]);
+			btrfs_put_root(gang[i]);
 		}
 		root_objectid++;
 	}
@@ -3968,7 +3968,7 @@ int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info)
 	/* release the uncleaned roots due to error */
 	for (; i < ret; i++) {
 		if (gang[i])
-			btrfs_put_fs_root(gang[i]);
+			btrfs_put_root(gang[i]);
 	}
 	return err;
 }
@@ -4368,12 +4368,12 @@ static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info)
 	while (!list_empty(&splice)) {
 		root = list_first_entry(&splice, struct btrfs_root,
 					 delalloc_root);
-		root = btrfs_grab_fs_root(root);
+		root = btrfs_grab_root(root);
 		BUG_ON(!root);
 		spin_unlock(&fs_info->delalloc_root_lock);
 
 		btrfs_destroy_delalloc_inodes(root);
-		btrfs_put_fs_root(root);
+		btrfs_put_root(root);
 
 		spin_lock(&fs_info->delalloc_root_lock);
 	}

fs/btrfs/disk-io.h

@@ -89,7 +89,7 @@ struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info);
  * If you want to ensure the whole tree is safe, you should use
  * 	fs_info->subvol_srcu
  */
-static inline struct btrfs_root *btrfs_grab_fs_root(struct btrfs_root *root)
+static inline struct btrfs_root *btrfs_grab_root(struct btrfs_root *root)
 {
 	if (!root)
 		return NULL;
@@ -98,7 +98,7 @@ static inline struct btrfs_root *btrfs_grab_fs_root(struct btrfs_root *root)
 	return NULL;
 }
 
-static inline void btrfs_put_fs_root(struct btrfs_root *root)
+static inline void btrfs_put_root(struct btrfs_root *root)
 {
 	if (!root)
 		return;

fs/btrfs/export.c

@@ -88,7 +88,7 @@ static struct dentry *btrfs_get_dentry(struct super_block *sb, u64 objectid,
 	key.offset = 0;
 
 	inode = btrfs_iget(sb, &key, root);
-	btrfs_put_fs_root(root);
+	btrfs_put_root(root);
 	if (IS_ERR(inode)) {
 		err = PTR_ERR(inode);
 		goto fail;

fs/btrfs/extent-tree.c

@@ -5418,7 +5418,7 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
 	} else {
 		free_extent_buffer(root->node);
 		free_extent_buffer(root->commit_root);
-		btrfs_put_fs_root(root);
+		btrfs_put_root(root);
 	}
 	root_dropped = true;
 out_end_trans:

fs/btrfs/file.c

@@ -297,7 +297,7 @@ static int __btrfs_run_defrag_inode(struct btrfs_fs_info *fs_info,
 	key.type = BTRFS_INODE_ITEM_KEY;
 	key.offset = 0;
 	inode = btrfs_iget(fs_info->sb, &key, inode_root);
-	btrfs_put_fs_root(inode_root);
+	btrfs_put_root(inode_root);
 	if (IS_ERR(inode)) {
 		ret = PTR_ERR(inode);
 		goto cleanup;

fs/btrfs/free-space-tree.c

@@ -1253,7 +1253,7 @@ int btrfs_clear_free_space_tree(struct btrfs_fs_info *fs_info)
 
 	free_extent_buffer(free_space_root->node);
 	free_extent_buffer(free_space_root->commit_root);
-	btrfs_put_fs_root(free_space_root);
+	btrfs_put_root(free_space_root);
 
 	return btrfs_commit_transaction(trans);
 

fs/btrfs/inode.c

@@ -5401,7 +5401,7 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry)
 		inode = btrfs_iget(dir->i_sb, &location, sub_root);
 	}
 	if (root != sub_root)
-		btrfs_put_fs_root(sub_root);
+		btrfs_put_root(sub_root);
 	srcu_read_unlock(&fs_info->subvol_srcu, index);
 
 	if (!IS_ERR(inode) && root != sub_root) {
@@ -9729,14 +9729,14 @@ int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr)
 	while (!list_empty(&splice) && nr) {
 		root = list_first_entry(&splice, struct btrfs_root,
 					delalloc_root);
-		root = btrfs_grab_fs_root(root);
+		root = btrfs_grab_root(root);
 		BUG_ON(!root);
 		list_move_tail(&root->delalloc_root,
 			       &fs_info->delalloc_roots);
 		spin_unlock(&fs_info->delalloc_root_lock);
 
 		ret = start_delalloc_inodes(root, nr, false);
-		btrfs_put_fs_root(root);
+		btrfs_put_root(root);
 		if (ret < 0)
 			goto out;
 

fs/btrfs/ioctl.c

@@ -676,7 +676,7 @@ static noinline int create_subvol(struct inode *dir,
 	btrfs_record_root_in_trans(trans, new_root);
 
 	ret = btrfs_create_subvol_root(trans, new_root, root, new_dirid);
-	btrfs_put_fs_root(new_root);
+	btrfs_put_root(new_root);
 	if (ret) {
 		/* We potentially lose an unused inode item here */
 		btrfs_abort_transaction(trans, ret);
@@ -870,7 +870,7 @@ static int create_snapshot(struct btrfs_root *root, struct inode *dir,
 	d_instantiate(dentry, inode);
 	ret = 0;
 fail:
-	btrfs_put_fs_root(pending_snapshot->snap);
+	btrfs_put_root(pending_snapshot->snap);
 	btrfs_subvolume_release_metadata(fs_info, &pending_snapshot->block_rsv);
 dec_and_free:
 	if (snapshot_force_cow)
@@ -2176,7 +2176,7 @@ static noinline int search_ioctl(struct inode *inode,
 
 	if (sk->tree_id == 0) {
 		/* search the root of the inode that was passed */
-		root = btrfs_grab_fs_root(BTRFS_I(inode)->root);
+		root = btrfs_grab_root(BTRFS_I(inode)->root);
 	} else {
 		key.objectid = sk->tree_id;
 		key.type = BTRFS_ROOT_ITEM_KEY;
@@ -2210,7 +2210,7 @@ static noinline int search_ioctl(struct inode *inode,
 		ret = 0;
 err:
 	sk->nr_items = num_found;
-	btrfs_put_fs_root(root);
+	btrfs_put_root(root);
 	btrfs_free_path(path);
 	return ret;
 }
@@ -2371,7 +2371,7 @@ static noinline int btrfs_search_path_in_tree(struct btrfs_fs_info *info,
 	name[total_len] = '\0';
 	ret = 0;
 out:
-	btrfs_put_fs_root(root);
+	btrfs_put_root(root);
 	btrfs_free_path(path);
 	return ret;
 }
@@ -2499,7 +2499,7 @@ static int btrfs_search_path_in_tree_user(struct inode *inode,
 
 		memmove(args->path, ptr, total_len);
 		args->path[total_len] = '\0';
-		btrfs_put_fs_root(root);
+		btrfs_put_root(root);
 		root = NULL;
 		btrfs_release_path(path);
 	}
@@ -2536,7 +2536,7 @@ static int btrfs_search_path_in_tree_user(struct inode *inode,
 	args->name[item_len] = 0;
 
 out_put:
-	btrfs_put_fs_root(root);
+	btrfs_put_root(root);
 out:
 	btrfs_free_path(path);
 	return ret;
@@ -2739,7 +2739,7 @@ static int btrfs_ioctl_get_subvol_info(struct file *file, void __user *argp)
 		ret = -EFAULT;
 
 out:
-	btrfs_put_fs_root(root);
+	btrfs_put_root(root);
 out_free:
 	btrfs_free_path(path);
 	kzfree(subvol_info);
@@ -4034,7 +4034,7 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp)
 	btrfs_set_fs_incompat(fs_info, DEFAULT_SUBVOL);
 	btrfs_end_transaction(trans);
 out_free:
-	btrfs_put_fs_root(new_root);
+	btrfs_put_root(new_root);
 	btrfs_free_path(path);
 out:
 	mnt_drop_write_file(file);

fs/btrfs/ordered-data.c

@@ -580,7 +580,7 @@ void btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, u64 nr,
 	while (!list_empty(&splice) && nr) {
 		root = list_first_entry(&splice, struct btrfs_root,
 					ordered_root);
-		root = btrfs_grab_fs_root(root);
+		root = btrfs_grab_root(root);
 		BUG_ON(!root);
 		list_move_tail(&root->ordered_root,
 			       &fs_info->ordered_roots);
@@ -588,7 +588,7 @@ void btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, u64 nr,
 
 		done = btrfs_wait_ordered_extents(root, nr,
 						  range_start, range_len);
-		btrfs_put_fs_root(root);
+		btrfs_put_root(root);
 
 		spin_lock(&fs_info->ordered_root_lock);
 		if (nr != U64_MAX) {

fs/btrfs/qgroup.c

@@ -1040,7 +1040,7 @@ int btrfs_quota_enable(struct btrfs_fs_info *fs_info)
 	if (ret) {
 		free_extent_buffer(quota_root->node);
 		free_extent_buffer(quota_root->commit_root);
-		btrfs_put_fs_root(quota_root);
+		btrfs_put_root(quota_root);
 	}
 out:
 	if (ret) {
@@ -1106,7 +1106,7 @@ int btrfs_quota_disable(struct btrfs_fs_info *fs_info)
 
 	free_extent_buffer(quota_root->node);
 	free_extent_buffer(quota_root->commit_root);
-	btrfs_put_fs_root(quota_root);
+	btrfs_put_root(quota_root);
 
 end_trans:
 	ret = btrfs_end_transaction(trans);

fs/btrfs/relocation.c

@@ -303,7 +303,7 @@ static void free_backref_node(struct backref_cache *cache,
 {
 	if (node) {
 		cache->nr_nodes--;
-		btrfs_put_fs_root(node->root);
+		btrfs_put_root(node->root);
 		kfree(node);
 	}
 }
@@ -637,7 +637,7 @@ static struct btrfs_root *find_reloc_root(struct reloc_control *rc,
 		root = (struct btrfs_root *)node->data;
 	}
 	spin_unlock(&rc->reloc_root_tree.lock);
-	return btrfs_grab_fs_root(root);
+	return btrfs_grab_root(root);
 }
 
 static int is_cowonly_root(u64 root_objectid)
@@ -948,7 +948,7 @@ struct backref_node *build_backref_tree(struct reloc_control *rc,
 			ASSERT(btrfs_root_bytenr(&root->root_item) ==
 			       cur->bytenr);
 			if (should_ignore_root(root)) {
-				btrfs_put_fs_root(root);
+				btrfs_put_root(root);
 				list_add(&cur->list, &useless);
 			} else {
 				cur->root = root;
@@ -965,7 +965,7 @@ struct backref_node *build_backref_tree(struct reloc_control *rc,
 		ret = btrfs_search_slot(NULL, root, node_key, path2, 0, 0);
 		path2->lowest_level = 0;
 		if (ret < 0) {
-			btrfs_put_fs_root(root);
+			btrfs_put_root(root);
 			err = ret;
 			goto out;
 		}
@@ -981,7 +981,7 @@ struct backref_node *build_backref_tree(struct reloc_control *rc,
 				  root->root_key.objectid,
 				  node_key->objectid, node_key->type,
 				  node_key->offset);
-			btrfs_put_fs_root(root);
+			btrfs_put_root(root);
 			err = -ENOENT;
 			goto out;
 		}
@@ -994,7 +994,7 @@ struct backref_node *build_backref_tree(struct reloc_control *rc,
 				ASSERT(btrfs_root_bytenr(&root->root_item) ==
 				       lower->bytenr);
 				if (should_ignore_root(root)) {
-					btrfs_put_fs_root(root);
+					btrfs_put_root(root);
 					list_add(&lower->list, &useless);
 				} else {
 					lower->root = root;
@@ -1004,7 +1004,7 @@ struct backref_node *build_backref_tree(struct reloc_control *rc,
 
 			edge = alloc_backref_edge(cache);
 			if (!edge) {
-				btrfs_put_fs_root(root);
+				btrfs_put_root(root);
 				err = -ENOMEM;
 				goto out;
 			}
@@ -1014,7 +1014,7 @@ struct backref_node *build_backref_tree(struct reloc_control *rc,
 			if (!rb_node) {
 				upper = alloc_backref_node(cache);
 				if (!upper) {
-					btrfs_put_fs_root(root);
+					btrfs_put_root(root);
 					free_backref_edge(cache, edge);
 					err = -ENOMEM;
 					goto out;
@@ -1063,7 +1063,7 @@ struct backref_node *build_backref_tree(struct reloc_control *rc,
 			edge->node[UPPER] = upper;
 
 			if (rb_node) {
-				btrfs_put_fs_root(root);
+				btrfs_put_root(root);
 				break;
 			}
 			lower = upper;
@@ -1302,7 +1302,7 @@ static int clone_backref_node(struct btrfs_trans_handle *trans,
 	new_node->level = node->level;
 	new_node->lowest = node->lowest;
 	new_node->checked = 1;
-	new_node->root = btrfs_grab_fs_root(dest);
+	new_node->root = btrfs_grab_root(dest);
 	ASSERT(new_node->root);
 
 	if (!node->lowest) {
@@ -2271,7 +2271,7 @@ static void insert_dirty_subvol(struct btrfs_trans_handle *trans,
 	btrfs_update_reloc_root(trans, root);
 
 	if (list_empty(&root->reloc_dirty_list)) {
-		btrfs_grab_fs_root(root);
+		btrfs_grab_root(root);
 		list_add_tail(&root->reloc_dirty_list, &rc->dirty_subvol_roots);
 	}
 }
@@ -2303,7 +2303,7 @@ static int clean_dirty_subvols(struct reloc_control *rc)
 			 */
 			smp_wmb();
 			clear_bit(BTRFS_ROOT_DEAD_RELOC_TREE, &root->state);
-			btrfs_put_fs_root(root);
+			btrfs_put_root(root);
 		} else {
 			/* Orphan reloc tree, just clean it up */
 			ret2 = btrfs_drop_snapshot(root, NULL, 0, 1);
@@ -2528,7 +2528,7 @@ int prepare_to_merge(struct reloc_control *rc, int err)
 		btrfs_update_reloc_root(trans, root);
 
 		list_add(&reloc_root->root_list, &reloc_roots);
-		btrfs_put_fs_root(root);
+		btrfs_put_root(root);
 	}
 
 	list_splice(&reloc_roots, &rc->reloc_roots);
@@ -2590,7 +2590,7 @@ void merge_reloc_roots(struct reloc_control *rc)
 			BUG_ON(root->reloc_root != reloc_root);
 
 			ret = merge_reloc_root(rc, root);
-			btrfs_put_fs_root(root);
+			btrfs_put_root(root);
 			if (ret) {
 				if (list_empty(&reloc_root->root_list))
 					list_add_tail(&reloc_root->root_list,
@@ -2651,7 +2651,7 @@ static int record_reloc_root_in_trans(struct btrfs_trans_handle *trans,
 	BUG_ON(IS_ERR(root));
 	BUG_ON(root->reloc_root != reloc_root);
 	ret = btrfs_record_root_in_trans(trans, root);
-	btrfs_put_fs_root(root);
+	btrfs_put_root(root);
 
 	return ret;
 }
@@ -2686,8 +2686,8 @@ struct btrfs_root *select_reloc_root(struct btrfs_trans_handle *trans,
 			BUG_ON(next->new_bytenr);
 			BUG_ON(!list_empty(&next->list));
 			next->new_bytenr = root->node->start;
-			btrfs_put_fs_root(next->root);
-			next->root = btrfs_grab_fs_root(root);
+			btrfs_put_root(next->root);
+			next->root = btrfs_grab_root(root);
 			ASSERT(next->root);
 			list_add_tail(&next->list,
 				      &rc->backref_cache.changed);
@@ -3160,8 +3160,8 @@ static int relocate_tree_block(struct btrfs_trans_handle *trans,
 			btrfs_record_root_in_trans(trans, root);
 			root = root->reloc_root;
 			node->new_bytenr = root->node->start;
-			btrfs_put_fs_root(node->root);
-			node->root = btrfs_grab_fs_root(root);
+			btrfs_put_root(node->root);
+			node->root = btrfs_grab_root(root);
 			ASSERT(node->root);
 			list_add_tail(&node->list, &rc->backref_cache.changed);
 		} else {
@@ -3857,7 +3857,7 @@ static int find_data_references(struct reloc_control *rc,
 
 	}
 out:
-	btrfs_put_fs_root(root);
+	btrfs_put_root(root);
 out_free:
 	btrfs_free_path(path);
 	return err;
@@ -4343,7 +4343,7 @@ struct inode *create_reloc_inode(struct btrfs_fs_info *fs_info,
 
 	trans = btrfs_start_transaction(root, 6);
 	if (IS_ERR(trans)) {
-		btrfs_put_fs_root(root);
+		btrfs_put_root(root);
 		return ERR_CAST(trans);
 	}
 
@@ -4363,7 +4363,7 @@ struct inode *create_reloc_inode(struct btrfs_fs_info *fs_info,
 
 	err = btrfs_orphan_add(trans, BTRFS_I(inode));
 out:
-	btrfs_put_fs_root(root);
+	btrfs_put_root(root);
 	btrfs_end_transaction(trans);
 	btrfs_btree_balance_dirty(fs_info);
 	if (err) {
@@ -4635,7 +4635,7 @@ int btrfs_recover_relocation(struct btrfs_root *root)
 					goto out;
 				}
 			} else {
-				btrfs_put_fs_root(fs_root);
+				btrfs_put_root(fs_root);
 			}
 		}
 
@@ -4689,7 +4689,7 @@ int btrfs_recover_relocation(struct btrfs_root *root)
 		err = __add_reloc_root(reloc_root);
 		BUG_ON(err < 0); /* -ENOMEM or logic error */
 		fs_root->reloc_root = reloc_root;
-		btrfs_put_fs_root(fs_root);
+		btrfs_put_root(fs_root);
 	}
 
 	err = btrfs_commit_transaction(trans);
@@ -4725,7 +4725,7 @@ int btrfs_recover_relocation(struct btrfs_root *root)
 			err = PTR_ERR(fs_root);
 		} else {
 			err = btrfs_orphan_cleanup(fs_root);
-			btrfs_put_fs_root(fs_root);
+			btrfs_put_root(fs_root);
 		}
 	}
 	return err;

fs/btrfs/root-tree.c

@@ -287,7 +287,7 @@ int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info)
 			set_bit(BTRFS_ROOT_DEAD_TREE, &root->state);
 			btrfs_add_dead_root(root);
 		}
-		btrfs_put_fs_root(root);
+		btrfs_put_root(root);
 	}
 
 	btrfs_free_path(path);

fs/btrfs/scrub.c

@@ -668,7 +668,7 @@ static int scrub_print_warning_inode(u64 inum, u64 offset, u64 root,
 
 	ret = btrfs_search_slot(NULL, local_root, &key, swarn->path, 0, 0);
 	if (ret) {
-		btrfs_put_fs_root(local_root);
+		btrfs_put_root(local_root);
 		btrfs_release_path(swarn->path);
 		goto err;
 	}
@@ -689,7 +689,7 @@ static int scrub_print_warning_inode(u64 inum, u64 offset, u64 root,
 	ipath = init_ipath(4096, local_root, swarn->path);
 	memalloc_nofs_restore(nofs_flag);
 	if (IS_ERR(ipath)) {
-		btrfs_put_fs_root(local_root);
+		btrfs_put_root(local_root);
 		ret = PTR_ERR(ipath);
 		ipath = NULL;
 		goto err;
@@ -713,7 +713,7 @@ static int scrub_print_warning_inode(u64 inum, u64 offset, u64 root,
 				  min(isize - offset, (u64)PAGE_SIZE), nlink,
 				  (char *)(unsigned long)ipath->fspath->val[i]);
 
-	btrfs_put_fs_root(local_root);
+	btrfs_put_root(local_root);
 	free_ipath(ipath);
 	return 0;
 

fs/btrfs/send.c

@@ -7205,7 +7205,7 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
 			if (!btrfs_root_readonly(clone_root) ||
 			    btrfs_root_dead(clone_root)) {
 				spin_unlock(&clone_root->root_item_lock);
-				btrfs_put_fs_root(clone_root);
+				btrfs_put_root(clone_root);
 				srcu_read_unlock(&fs_info->subvol_srcu, index);
 				ret = -EPERM;
 				goto out;
@@ -7213,7 +7213,7 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
 			if (clone_root->dedupe_in_progress) {
 				dedupe_in_progress_warn(clone_root);
 				spin_unlock(&clone_root->root_item_lock);
-				btrfs_put_fs_root(clone_root);
+				btrfs_put_root(clone_root);
 				srcu_read_unlock(&fs_info->subvol_srcu, index);
 				ret = -EAGAIN;
 				goto out;
@@ -7270,7 +7270,7 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
 	 * for possible clone sources.
 	 */
 	sctx->clone_roots[sctx->clone_roots_cnt++].root =
-		btrfs_grab_fs_root(sctx->send_root);
+		btrfs_grab_root(sctx->send_root);
 
 	/* We do a bsearch later */
 	sort(sctx->clone_roots, sctx->clone_roots_cnt,
@@ -7358,20 +7358,20 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
 		for (i = 0; i < sctx->clone_roots_cnt; i++) {
 			btrfs_root_dec_send_in_progress(
 					sctx->clone_roots[i].root);
-			btrfs_put_fs_root(sctx->clone_roots[i].root);
+			btrfs_put_root(sctx->clone_roots[i].root);
 		}
 	} else {
 		for (i = 0; sctx && i < clone_sources_to_rollback; i++) {
 			btrfs_root_dec_send_in_progress(
 					sctx->clone_roots[i].root);
-			btrfs_put_fs_root(sctx->clone_roots[i].root);
+			btrfs_put_root(sctx->clone_roots[i].root);
 		}
 
 		btrfs_root_dec_send_in_progress(send_root);
 	}
 	if (sctx && !IS_ERR_OR_NULL(sctx->parent_root)) {
 		btrfs_root_dec_send_in_progress(sctx->parent_root);
-		btrfs_put_fs_root(sctx->parent_root);
+		btrfs_put_root(sctx->parent_root);
 	}
 
 	kvfree(clone_sources_tmp);

fs/btrfs/super.c

@@ -1144,7 +1144,7 @@ static char *get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
 			ptr[0] = '/';
 			btrfs_release_path(path);
 		}
-		btrfs_put_fs_root(fs_root);
+		btrfs_put_root(fs_root);
 		fs_root = NULL;
 	}
 
@@ -1158,7 +1158,7 @@ static char *get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
 	return name;
 
 err:
-	btrfs_put_fs_root(fs_root);
+	btrfs_put_root(fs_root);
 	btrfs_free_path(path);
 	kfree(name);
 	return ERR_PTR(ret);

fs/btrfs/tests/btrfs-tests.c

@@ -209,7 +209,7 @@ void btrfs_free_dummy_root(struct btrfs_root *root)
 		/* One for allocate_extent_buffer */
 		free_extent_buffer(root->node);
 	}
-	btrfs_put_fs_root(root);
+	btrfs_put_root(root);
 }
 
 struct btrfs_block_group *

fs/btrfs/tree-log.c

@@ -3289,7 +3289,7 @@ static void free_log_tree(struct btrfs_trans_handle *trans,
 	clear_extent_bits(&log->dirty_log_pages, 0, (u64)-1,
 			  EXTENT_DIRTY | EXTENT_NEW | EXTENT_NEED_WAIT);
 	free_extent_buffer(log->node);
-	btrfs_put_fs_root(log);
+	btrfs_put_root(log);
 }
 
 /*
@@ -6183,7 +6183,7 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree)
 							log->node->len);
 			free_extent_buffer(log->node);
 			free_extent_buffer(log->commit_root);
-			btrfs_put_fs_root(log);
+			btrfs_put_root(log);
 
 			if (!ret)
 				goto next;
@@ -6219,10 +6219,10 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree)
 		}
 
 		wc.replay_dest->log_root = NULL;
-		btrfs_put_fs_root(wc.replay_dest);
+		btrfs_put_root(wc.replay_dest);
 		free_extent_buffer(log->node);
 		free_extent_buffer(log->commit_root);
-		btrfs_put_fs_root(log);
+		btrfs_put_root(log);
 
 		if (ret)
 			goto error;
@@ -6256,7 +6256,7 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree)
 	free_extent_buffer(log_root_tree->node);
 	log_root_tree->log_root = NULL;
 	clear_bit(BTRFS_FS_LOG_RECOVERING, &fs_info->flags);
-	btrfs_put_fs_root(log_root_tree);
+	btrfs_put_root(log_root_tree);
 
 	return 0;
 error:

fs/btrfs/volumes.c

@@ -4443,7 +4443,7 @@ static int btrfs_check_uuid_tree_entry(struct btrfs_fs_info *fs_info,
 			ret = 1;
 		break;
 	}
-	btrfs_put_fs_root(subvol_root);
+	btrfs_put_root(subvol_root);
 out:
 	return ret;
 }