ext4fs write support

Signed-off-by: Uma Shankar <uma.shankar@samsung.com>
Signed-off-by: Manjunatha C Achar <a.manjunatha@samsung.com>
Signed-off-by: Iqbal Shareef <iqbal.ams@samsung.com>
Signed-off-by: Hakgoo Lee <goodguy.lee@samsung.com>
diff --git a/include/ext4fs.h b/include/ext4fs.h
index 58a6a1d..ab2983c 100644
--- a/include/ext4fs.h
+++ b/include/ext4fs.h
@@ -117,6 +117,18 @@
 extern struct ext2_data *ext4fs_root;
 extern struct ext2fs_node *ext4fs_file;
 
+#if defined(CONFIG_CMD_EXT4_WRITE)
+extern struct ext2_inode *g_parent_inode;
+extern int gd_index;
+extern int gindex;
+
+int ext4fs_init(void);
+void ext4fs_deinit(void);
+int ext4fs_filename_check(char *filename);
+int ext4fs_write(const char *fname, unsigned char *buffer,
+				unsigned long sizebytes);
+#endif
+
 struct ext_filesystem *get_fs(void);
 int init_fs(block_dev_desc_t *dev_desc);
 void deinit_fs(block_dev_desc_t *dev_desc);
diff --git a/include/ext_common.h b/include/ext_common.h
index c90d95b..9b97522 100644
--- a/include/ext_common.h
+++ b/include/ext_common.h
@@ -191,6 +191,8 @@
 int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc,
 					char *const argv[]);
 int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]);
+int do_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc,
+				char *const argv[]);
 int do_ext_load(cmd_tbl_t *cmdtp, int flag, int argc,
 					char *const argv[]);
 int do_ext_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]);