diff --git a/f2fs_utils/Android.mk b/f2fs_utils/Android.mk
new file mode 100644
index 0000000..f3a186c
--- /dev/null
+++ b/f2fs_utils/Android.mk
@@ -0,0 +1,67 @@
+# Copyright 2014 The Android Open Source Project
+
+LOCAL_PATH:= $(call my-dir)
+
+libf2fs_ioutils_src_files := \
+    f2fs_ioutils.c
+
+# ---------------------------------------
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := $(libf2fs_ioutils_src_files)
+LOCAL_C_INCLUDES := external/f2fs-tools/include external/f2fs-tools/mkfs
+LOCAL_STATIC_LIBRARIES := \
+    libsparse_host \
+    libext2_uuid_host \
+    libz
+LOCAL_MODULE := libf2fs_ioutils_host
+include $(BUILD_HOST_STATIC_LIBRARY)
+
+# ---------------------------------------
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := f2fs_dlutils.c
+LOCAL_C_INCLUDES := external/f2fs-tools/include external/f2fs-tools/mkfs
+# Will attempt to dlopen("libf2fs_fmt_host_dyn")
+LOCAL_LDLIBS := -ldl
+LOCAL_MODULE := libf2fs_dlutils_host
+include $(BUILD_HOST_STATIC_LIBRARY)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := libf2fs_utils_host
+LOCAL_SRC_FILES := f2fs_utils.c
+LOCAL_STATIC_LIBRARIES := \
+    libsparse_host \
+    libz
+LOCAL_C_INCLUDES := external/f2fs-tools/include external/f2fs-tools/mkfs
+include $(BUILD_HOST_STATIC_LIBRARY)
+
+
+#
+# -- All host/targets excluding windows
+#
+
+ifneq ($(HOST_OS),windows)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := libf2fs_dlutils
+LOCAL_SRC_FILES := f2fs_dlutils.c
+LOCAL_C_INCLUDES := external/f2fs-tools/include external/f2fs-tools/mkfs
+LOCAL_SHARED_LIBRARIES := libdl
+include $(BUILD_SHARED_LIBRARY)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := libf2fs_dlutils_static
+LOCAL_SRC_FILES := f2fs_dlutils.c
+LOCAL_C_INCLUDES := external/f2fs-tools/include external/f2fs-tools/mkfs
+LOCAL_SHARED_LIBRARIES := libdl
+include $(BUILD_STATIC_LIBRARY)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := libf2fs_utils_static
+LOCAL_SRC_FILES := f2fs_utils.c
+LOCAL_C_INCLUDES := external/f2fs-tools/include external/f2fs-tools/mkfs
+LOCAL_STATIC_LIBRARIES := \
+    libsparse_static
+include $(BUILD_STATIC_LIBRARY)
+
+endif
+
diff --git a/f2fs_utils/MODULE_LICENSE_APACHE2 b/f2fs_utils/MODULE_LICENSE_APACHE2
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/f2fs_utils/MODULE_LICENSE_APACHE2
diff --git a/f2fs_utils/NOTICE b/f2fs_utils/NOTICE
new file mode 100644
index 0000000..5d14293
--- /dev/null
+++ b/f2fs_utils/NOTICE
@@ -0,0 +1,190 @@
+
+   Copyright (c) 2010, The Android Open Source Project
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
diff --git a/f2fs_utils/f2fs_dlutils.c b/f2fs_utils/f2fs_dlutils.c
new file mode 100644
index 0000000..6fddc6e
--- /dev/null
+++ b/f2fs_utils/f2fs_dlutils.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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
+ * COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ */
+
+#define _LARGEFILE64_SOURCE
+
+#include <stdio.h>
+
+#include <dlfcn.h>
+#include <assert.h>
+
+#include <f2fs_fs.h>
+#include <f2fs_format_utils.h>
+#define F2FS_DYN_LIB "libf2fs_fmt_host_dyn.so"
+
+int (*f2fs_format_device_dl)(void);
+void (*f2fs_init_configuration_dl)(struct f2fs_configuration *);
+
+int f2fs_format_device(void) {
+	assert(f2fs_format_device_dl);
+	return f2fs_format_device_dl();
+}
+void f2fs_init_configuration(struct f2fs_configuration *config) {
+	assert(f2fs_init_configuration_dl);
+	f2fs_init_configuration_dl(config);
+}
+
+int dlopenf2fs() {
+	void* f2fs_lib;
+
+	f2fs_lib = dlopen(F2FS_DYN_LIB, RTLD_LAZY);
+	if (!f2fs_lib) {
+		return -1;
+	}
+	f2fs_format_device_dl = dlsym(f2fs_lib, "f2fs_format_device");
+	f2fs_init_configuration_dl = dlsym(f2fs_lib, "f2fs_init_configuration");
+	if (!f2fs_format_device_dl || !f2fs_init_configuration_dl) {
+		return -1;
+	}
+	return 0;
+}
diff --git a/f2fs_utils/f2fs_ioutils.c b/f2fs_utils/f2fs_ioutils.c
new file mode 100644
index 0000000..a211b05
--- /dev/null
+++ b/f2fs_utils/f2fs_ioutils.c
@@ -0,0 +1,188 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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
+ * COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ */
+
+#define _LARGEFILE64_SOURCE
+
+#include <asm/types.h>
+#include <errno.h>
+#include <linux/fs.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>  /* memset() */
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <dlfcn.h>
+
+#include <assert.h>
+
+#include <f2fs_fs.h>
+#include <f2fs_format_utils.h>
+
+#include <sparse/sparse.h>
+
+struct selabel_handle;
+
+#include "make_f2fs.h"
+
+#ifdef USE_MINGW
+
+#include <winsock2.h>
+
+/* These match the Linux definitions of these flags.
+   L_xx is defined to avoid conflicting with the win32 versions.
+*/
+#define L_S_IRUSR 00400
+#define L_S_IWUSR 00200
+#define L_S_IXUSR 00100
+#define S_IRWXU (L_S_IRUSR | L_S_IWUSR | L_S_IXUSR)
+#define S_IRGRP 00040
+#define S_IWGRP 00020
+#define S_IXGRP 00010
+#define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP)
+#define S_IROTH 00004
+#define S_IWOTH 00002
+#define S_IXOTH 00001
+#define S_IRWXO (S_IROTH | S_IWOTH | S_IXOTH)
+#define S_ISUID 0004000
+#define S_ISGID 0002000
+#define S_ISVTX 0001000
+
+#else
+
+#include <selinux/selinux.h>
+#include <selinux/label.h>
+#include <selinux/android.h>
+
+#define O_BINARY 0
+
+#endif
+
+struct f2fs_configuration config;
+struct sparse_file *f2fs_sparse_file;
+
+struct buf_item {
+	void *buf;
+	size_t len;
+	struct buf_item *next;
+};
+
+struct buf_item *buf_list;
+
+static int dev_write_fd(void *buf, __u64 offset, size_t len)
+{
+	if (lseek64(config.fd, (off64_t)offset, SEEK_SET) < 0)
+		return -1;
+	if (write(config.fd, buf, len) != len)
+		return -1;
+	return 0;
+}
+
+void flush_sparse_buffs()
+{
+	while (buf_list) {
+		struct buf_item *bi = buf_list;
+		buf_list = buf_list->next;
+		free(bi->buf);
+		free(bi);
+	}
+}
+
+static int dev_write_sparse(void *buf, __u64 byte_offset, size_t byte_len)
+{
+	struct buf_item *bi = calloc(1, sizeof(struct buf_item));
+
+	if (bi == NULL) {
+		return -ENOMEM;
+	}
+	bi->buf = malloc(byte_len);
+	if (bi->buf == NULL) {
+		free(bi);
+		return -ENOMEM;
+	}
+
+	bi->len = byte_len;
+	memcpy(bi->buf, buf, byte_len);
+	bi->next = buf_list;
+	buf_list = bi;
+
+	sparse_file_add_data(f2fs_sparse_file, bi->buf, byte_len, byte_offset/F2FS_BLKSIZE);
+	return 0;
+}
+
+void f2fs_finalize_device()
+{
+}
+
+int f2fs_trim_device()
+{
+	return 0;
+}
+
+/*
+ * IO interfaces
+ */
+int dev_read(void  *buf, __u64 offset, size_t len)
+{
+	return 0;
+}
+
+int dev_write(void *buf, __u64 offset, size_t len)
+{
+	if (config.fd >= 0) {
+		return dev_write_fd(buf, offset, len);
+	} else {
+		return dev_write_sparse(buf, offset, len);
+	}
+}
+
+
+int dev_fill(void *buf, __u64 offset, size_t len)
+{
+	int ret;
+	if (config.fd >= 0) {
+		return dev_write_fd(buf, offset, len);
+	}
+        // sparse file fills with zero by default.
+	// return sparse_file_add_fill(f2fs_sparse_file, ((__u8*)(bi->buf))[0], byte_len, byte_offset/F2FS_BLKSIZE);
+	return 0;
+}
+
+int dev_read_block(void *buf, __u64 blk_addr)
+{
+	assert(false); // Must not be invoked.
+	return 0;
+}
+
+int dev_read_blocks(void *buf, __u64 addr, __u32 nr_blks)
+{
+	assert(false); // Must not be invoked.
+	return 0;
+}
+
diff --git a/f2fs_utils/f2fs_utils.c b/f2fs_utils/f2fs_utils.c
new file mode 100644
index 0000000..d42ccc1
--- /dev/null
+++ b/f2fs_utils/f2fs_utils.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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
+ * COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ */
+
+#define _LARGEFILE64_SOURCE
+
+#include <fcntl.h>
+#include <dlfcn.h>
+
+#include <f2fs_fs.h>
+#include <f2fs_format_utils.h>
+
+#include <sparse/sparse.h>
+
+struct selabel_handle;
+
+#include "make_f2fs.h"
+
+extern void flush_sparse_buffs();
+
+struct f2fs_configuration config;
+struct sparse_file *f2fs_sparse_file;
+extern int dlopenf2fs();
+
+static void reset_f2fs_info() {
+	// Reset all the global data structures used by make_f2fs so it
+	// can be called again.
+	memset(&config, 0, sizeof(config));
+	config.fd = -1;
+	if (f2fs_sparse_file) {
+		sparse_file_destroy(f2fs_sparse_file);
+		f2fs_sparse_file = NULL;
+	}
+}
+
+int make_f2fs_sparse_fd(int fd, long long len,
+		const char *mountpoint, struct selabel_handle *sehnd)
+{
+	if (dlopenf2fs() < 0) {
+		return -1;
+	}
+	reset_f2fs_info();
+	f2fs_init_configuration(&config);
+	len &= ~((__u64)F2FS_BLKSIZE);
+	config.total_sectors = len / config.sector_size;
+	config.start_sector = 0;
+	f2fs_sparse_file = sparse_file_new(F2FS_BLKSIZE, len);
+	f2fs_format_device();
+	sparse_file_write(f2fs_sparse_file, fd, /*gzip*/0, /*sparse*/1, /*crc*/0);
+	sparse_file_destroy(f2fs_sparse_file);
+	flush_sparse_buffs();
+	f2fs_sparse_file = NULL;
+	return 0;
+}
diff --git a/f2fs_utils/make_f2fs.h b/f2fs_utils/make_f2fs.h
new file mode 100644
index 0000000..f02694a
--- /dev/null
+++ b/f2fs_utils/make_f2fs.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _MAKE_F2FS_H_
+#define _MAKE_F2FS_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct selabel_handle;
+
+int make_f2fs_sparse_fd(int fd, long long len,
+              const char *mountpoint, struct selabel_handle *sehnd);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif