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diff --git a/include/ext4_ialloc.h b/include/ext4_ialloc.h
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+/*
+ * Copyright (c) 2013 Grzegorz Kostka (kostka.grzegorz@gmail.com)
+ *
+ *
+ * HelenOS:
+ * Copyright (c) 2012 Martin Sucha
+ * Copyright (c) 2012 Frantisek Princ
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup lwext4
+ * @{
+ */
+/**
+ * @file  ext4_ialloc.c
+ * @brief Inode allocation procedures.
+ */
+
+#ifndef EXT4_IALLOC_H_
+#define EXT4_IALLOC_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "ext4_config.h"
+#include "ext4_types.h"
+
+/**@brief Calculate and set checksum of inode bitmap.
+ * @param sb superblock pointer.
+ * @param bg block group
+ * @param bitmap bitmap buffer
+ */
+void ext4_ialloc_set_bitmap_csum(struct ext4_sblock *sb, struct ext4_bgroup *bg,
+				 void *bitmap);
+
+/**@brief Free i-node number and modify filesystem data structers.
+ * @param fs     Filesystem, where the i-node is located
+ * @param index  Index of i-node to be release
+ * @param is_dir Flag us for information whether i-node is directory or not
+ */
+int ext4_ialloc_free_inode(struct ext4_fs *fs, uint32_t index, bool is_dir);
+
+/**@brief I-node allocation algorithm.
+ * This is more simple algorithm, than Orlov allocator used
+ * in the Linux kernel.
+ * @param fs     Filesystem to allocate i-node on
+ * @param index  Output value - allocated i-node number
+ * @param is_dir Flag if allocated i-node will be file or directory
+ * @return Error code
+ */
+int ext4_ialloc_alloc_inode(struct ext4_fs *fs, uint32_t *index, bool is_dir);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EXT4_IALLOC_H_ */
+
+/**
+ * @}
+ */