configfs: make configfs_create() return inode

Get rid of the callback, deal with that and dentry in callers
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Christoph Hellwig <hch@lst.de>

fs/configfs/configfs_internal.h

@@ -66,7 +66,7 @@ extern struct kmem_cache *configfs_dir_cachep;
 extern int configfs_is_root(struct config_item *item);
 
 extern struct inode * configfs_new_inode(umode_t mode, struct configfs_dirent *, struct super_block *);
-extern int configfs_create(struct dentry *, umode_t mode, void (*init)(struct inode *));
+extern struct inode *configfs_create(struct dentry *, umode_t mode);
 
 extern int configfs_create_file(struct config_item *, const struct configfs_attribute *);
 extern int configfs_create_bin_file(struct config_item *,

fs/configfs/dir.c

@@ -265,32 +265,6 @@ static void configfs_remove_dirent(struct dentry *dentry)
 	configfs_put(sd);
 }
 
-static void init_dir(struct inode * inode)
-{
-	inode->i_op = &configfs_dir_inode_operations;
-	inode->i_fop = &configfs_dir_operations;
-
-	/* directory inodes start off with i_nlink == 2 (for "." entry) */
-	inc_nlink(inode);
-}
-
-static void configfs_init_file(struct inode * inode)
-{
-	inode->i_size = PAGE_SIZE;
-	inode->i_fop = &configfs_file_operations;
-}
-
-static void configfs_init_bin_file(struct inode *inode)
-{
-	inode->i_size = 0;
-	inode->i_fop = &configfs_bin_file_operations;
-}
-
-static void init_symlink(struct inode * inode)
-{
-	inode->i_op = &configfs_symlink_inode_operations;
-}
-
 /**
  *	configfs_create_dir - create a directory for an config_item.
  *	@item:		config_itemwe're creating directory for.
@@ -306,6 +280,7 @@ static int configfs_create_dir(struct config_item *item, struct dentry *dentry,
 	int error;
 	umode_t mode = S_IFDIR| S_IRWXU | S_IRUGO | S_IXUGO;
 	struct dentry *p = dentry->d_parent;
+	struct inode *inode;
 
 	BUG_ON(!item);
 
@@ -320,17 +295,24 @@ static int configfs_create_dir(struct config_item *item, struct dentry *dentry,
 		return error;
 
 	configfs_set_dir_dirent_depth(p->d_fsdata, dentry->d_fsdata);
-	error = configfs_create(dentry, mode, init_dir);
-	if (error)
+	inode = configfs_create(dentry, mode);
+	if (IS_ERR(inode))
 		goto out_remove;
 
+	inode->i_op = &configfs_dir_inode_operations;
+	inode->i_fop = &configfs_dir_operations;
+	/* directory inodes start off with i_nlink == 2 (for "." entry) */
+	inc_nlink(inode);
+	d_instantiate(dentry, inode);
+	/* already hashed */
+	dget(dentry);  /* pin directory dentries in core */
 	inc_nlink(d_inode(p));
 	item->ci_dentry = dentry;
 	return 0;
 
 out_remove:
 	configfs_remove_dirent(dentry);
-	return error;
+	return PTR_ERR(inode);
 }
 
 /*
@@ -378,20 +360,25 @@ int configfs_create_link(struct configfs_symlink *sl,
 	int err = 0;
 	umode_t mode = S_IFLNK | S_IRWXUGO;
 	struct configfs_dirent *p = parent->d_fsdata;
+	struct inode *inode;
 
 	err = configfs_make_dirent(p, dentry, sl, mode,
 				   CONFIGFS_ITEM_LINK, p->s_frag);
 	if (err)
 		return err;
 
-	err = configfs_create(dentry, mode, init_symlink);
-	if (err)
+	inode = configfs_create(dentry, mode);
+	if (IS_ERR(inode))
 		goto out_remove;
+
+	inode->i_op = &configfs_symlink_inode_operations;
+	d_instantiate(dentry, inode);
+	dget(dentry);  /* pin link dentries in core */
 	return 0;
 
 out_remove:
 	configfs_remove_dirent(dentry);
-	return err;
+	return PTR_ERR(inode);
 }
 
 static void remove_dir(struct dentry * d)
@@ -440,20 +427,27 @@ static void configfs_remove_dir(struct config_item * item)
 static int configfs_attach_attr(struct configfs_dirent * sd, struct dentry * dentry)
 {
 	struct configfs_attribute * attr = sd->s_element;
-	int error;
+	struct inode *inode;
 
 	spin_lock(&configfs_dirent_lock);
 	dentry->d_fsdata = configfs_get(sd);
 	sd->s_dentry = dentry;
 	spin_unlock(&configfs_dirent_lock);
 
-	error = configfs_create(dentry, (attr->ca_mode & S_IALLUGO) | S_IFREG,
-				(sd->s_type & CONFIGFS_ITEM_BIN_ATTR) ?
-					configfs_init_bin_file :
-					configfs_init_file);
-	if (error)
+	inode = configfs_create(dentry, (attr->ca_mode & S_IALLUGO) | S_IFREG);
+	if (IS_ERR(inode)) {
 		configfs_put(sd);
-	return error;
+		return PTR_ERR(inode);
+	}
+	if (sd->s_type & CONFIGFS_ITEM_BIN_ATTR) {
+		inode->i_size = 0;
+		inode->i_fop = &configfs_bin_file_operations;
+	} else {
+		inode->i_size = PAGE_SIZE;
+		inode->i_fop = &configfs_file_operations;
+	}
+	d_add(dentry, inode);
+	return 0;
 }
 
 static struct dentry * configfs_lookup(struct inode *dir,

fs/configfs/inode.c

@@ -164,41 +164,27 @@ static void configfs_set_inode_lock_class(struct configfs_dirent *sd,
 
 #endif /* CONFIG_LOCKDEP */
 
-int configfs_create(struct dentry * dentry, umode_t mode, void (*init)(struct inode *))
+struct inode *configfs_create(struct dentry *dentry, umode_t mode)
 {
-	int error = 0;
 	struct inode *inode = NULL;
 	struct configfs_dirent *sd;
 	struct inode *p_inode;
 
 	if (!dentry)
-		return -ENOENT;
+		return ERR_PTR(-ENOENT);
 
 	if (d_really_is_positive(dentry))
-		return -EEXIST;
+		return ERR_PTR(-EEXIST);
 
 	sd = dentry->d_fsdata;
 	inode = configfs_new_inode(mode, sd, dentry->d_sb);
 	if (!inode)
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 
 	p_inode = d_inode(dentry->d_parent);
 	p_inode->i_mtime = p_inode->i_ctime = current_time(p_inode);
 	configfs_set_inode_lock_class(sd, inode);
-
-	init(inode);
-	if (S_ISDIR(mode) || S_ISLNK(mode)) {
-		/*
-		 * ->symlink(), ->mkdir(), configfs_register_subsystem() or
-		 * create_default_group() - already hashed.
-		 */
-		d_instantiate(dentry, inode);
-		dget(dentry);  /* pin link and directory dentries in core */
-	} else {
-		/* ->lookup() */
-		d_add(dentry, inode);
-	}
-	return error;
+	return inode;
 }
 
 /*