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diff --git a/include/ext4_bitmap.h b/include/ext4_bitmap.h
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+++ b/include/ext4_bitmap.h
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+/*
+ * Copyright (c) 2013 Grzegorz Kostka (kostka.grzegorz@gmail.com)
+ * 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_bitmap.h
+ * @brief Block/inode bitmap allocator.
+ */
+
+#ifndef EXT4_BITMAP_H_
+#define EXT4_BITMAP_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "ext4_config.h"
+
+#include <stdint.h>
+#include <stdbool.h>
+
+/**@brief   Set bitmap bit.
+ * @param   bmap bitmap
+ * @param   bit bit to set*/
+static inline void ext4_bmap_bit_set(uint8_t *bmap, uint32_t bit)
+{
+	*(bmap + (bit >> 3)) |= (1 << (bit & 7));
+}
+
+/**@brief   Clear bitmap bit.
+ * @param   bmap bitmap buffer
+ * @param   bit bit to clear*/
+static inline void ext4_bmap_bit_clr(uint8_t *bmap, uint32_t bit)
+{
+	*(bmap + (bit >> 3)) &= ~(1 << (bit & 7));
+}
+
+/**@brief   Check if the bitmap bit is set.
+ * @param   bmap bitmap buffer
+ * @param   bit bit to check*/
+static inline bool ext4_bmap_is_bit_set(uint8_t *bmap, uint32_t bit)
+{
+	return (*(bmap + (bit >> 3)) & (1 << (bit & 7)));
+}
+
+/**@brief   Check if the bitmap bit is clear.
+ * @param   bmap bitmap buffer
+ * @param   bit bit to check*/
+static inline bool ext4_bmap_is_bit_clr(uint8_t *bmap, uint32_t bit)
+{
+	return !ext4_bmap_is_bit_set(bmap, bit);
+}
+
+/**@brief   Free range of bits in bitmap.
+ * @param   bmap bitmap buffer
+ * @param   sbit start bit
+ * @param   bcnt bit count*/
+void ext4_bmap_bits_free(uint8_t *bmap, uint32_t sbit, uint32_t bcnt);
+
+/**@brief   Find first clear bit in bitmap.
+ * @param   sbit start bit of search
+ * @param   ebit end bit of search
+ * @param   bit_id output parameter (first free bit)
+ * @return  standard error code*/
+int ext4_bmap_bit_find_clr(uint8_t *bmap, uint32_t sbit, uint32_t ebit,
+			   uint32_t *bit_id);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* EXT4_BITMAP_H_ */
+
+/**
+ * @}
+ */