include/part.h - filogic/uboot - Gitiles

 /*
  * (C) Copyright 2000-2004
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
 #ifndef _PART_H
 #define _PART_H

 #include <blk.h>
 #include <ide.h>

 struct block_drvr {
 	char *name;
 	struct blk_desc* (*get_dev)(int dev);
 	int (*select_hwpart)(int dev_num, int hwpart);
 };

 #define LOG2(x) (((x & 0xaaaaaaaa) ? 1 : 0) + ((x & 0xcccccccc) ? 2 : 0) + \
 		 ((x & 0xf0f0f0f0) ? 4 : 0) + ((x & 0xff00ff00) ? 8 : 0) + \
 		 ((x & 0xffff0000) ? 16 : 0))
 #define LOG2_INVALID(type) ((type)((sizeof(type)<<3)-1))

 /* Part types */
 #define PART_TYPE_UNKNOWN	0x00
 #define PART_TYPE_MAC		0x01
 #define PART_TYPE_DOS		0x02
 #define PART_TYPE_ISO		0x03
 #define PART_TYPE_AMIGA		0x04
 #define PART_TYPE_EFI		0x05

 /*
  * Type string for U-Boot bootable partitions
  */
 #define BOOT_PART_TYPE	"U-Boot"	/* primary boot partition type	*/
 #define BOOT_PART_COMP	"PPCBoot"	/* PPCBoot compatibility type	*/

 /* device types */
 #define DEV_TYPE_UNKNOWN	0xff	/* not connected */
 #define DEV_TYPE_HARDDISK	0x00	/* harddisk */
 #define DEV_TYPE_TAPE		0x01	/* Tape */
 #define DEV_TYPE_CDROM		0x05	/* CD-ROM */
 #define DEV_TYPE_OPDISK		0x07	/* optical disk */

 typedef struct disk_partition {
 	lbaint_t	start;	/* # of first block in partition	*/
 	lbaint_t	size;	/* number of blocks in partition	*/
 	ulong	blksz;		/* block size in bytes			*/
 	uchar	name[32];	/* partition name			*/
 	uchar	type[32];	/* string type description		*/
 	int	bootable;	/* Active/Bootable flag is set		*/
 #ifdef CONFIG_PARTITION_UUIDS
 	char	uuid[37];	/* filesystem UUID as string, if exists	*/
 #endif
 #ifdef CONFIG_PARTITION_TYPE_GUID
 	char	type_guid[37];	/* type GUID as string, if exists	*/
 #endif
 } disk_partition_t;

 /* Misc _get_dev functions */
 #ifdef CONFIG_PARTITIONS
 /**
  * blk_get_dev() - get a pointer to a block device given its type and number
  *
  * Each interface allocates its own devices and typically struct blk_desc is
  * contained with the interface's data structure. There is no global
  * numbering for block devices, so the interface name must be provided.
  *
  * @ifname:	Interface name (e.g. "ide", "scsi")
  * @dev:	Device number (0 for first device on that interface, 1 for
  *		second, etc.
  * @return pointer to the block device, or NULL if not available, or an
  *	   error occurred.
  */
 struct blk_desc *blk_get_dev(const char *ifname, int dev);

 /**
  * mmc_select_hwpart() - Select the MMC hardware partiion on an MMC device
  *
  * MMC devices can support partitioning at the hardware level. This is quite
  * separate from the normal idea of software-based partitions. MMC hardware
  * partitions must be explicitly selected. Once selected only the region of
  * the device covered by that partition is accessible.
  *
  * The MMC standard provides for two boot partitions (numbered 1 and 2),
  * rpmb (3), and up to 4 addition general-purpose partitions (4-7).
  *
  * @dev_num:	Block device number (struct blk_desc->dev value)
  * @hwpart:	Hardware partition number to select. 0 means the raw device,
  *		1 is the first partition, 2 is the second, etc.
  * @return 0 if OK, other value for an error
  */
 int mmc_select_hwpart(int dev_num, int hwpart);
 struct blk_desc *mg_disk_get_dev(int dev);
 struct blk_desc *host_get_dev(int dev);
 int host_get_dev_err(int dev, struct blk_desc **blk_devp);

 /* disk/part.c */
 int part_get_info(struct blk_desc *dev_desc, int part, disk_partition_t *info);
 void part_print(struct blk_desc *dev_desc);
 void part_init(struct blk_desc *dev_desc);
 void dev_print(struct blk_desc *dev_desc);

 /**
  * blk_get_device_by_str() - Get a block device given its interface/hw partition
  *
  * Each interface allocates its own devices and typically struct blk_desc is
  * contained with the interface's data structure. There is no global
  * numbering for block devices, so the interface name must be provided.
  *
  * The hardware parition is not related to the normal software partitioning
  * of a device - each hardware partition is effectively a separately
  * accessible block device. When a hardware parition is selected on MMC the
  * other hardware partitions become inaccessible. The same block device is
  * used to access all hardware partitions, but its capacity may change when a
  * different hardware partition is selected.
  *
  * When a hardware partition number is given, the block device switches to
  * that hardware partition.
  *
  * @ifname:	Interface name (e.g. "ide", "scsi")
  * @dev_str:	Device and optional hw partition. This can either be a string
  *		containing the device number (e.g. "2") or the device number
  *		and hardware partition number (e.g. "2.4") for devices that
  *		support it (currently only MMC).
  * @dev_desc:	Returns a pointer to the block device on success
  * @return block device number (local to the interface), or -1 on error
  */
 int blk_get_device_by_str(const char *ifname, const char *dev_str,
 			  struct blk_desc **dev_desc);

 /**
  * blk_get_device_part_str() - Get a block device and partition
  *
  * This calls blk_get_device_by_str() to look up a device. It also looks up
  * a partition and returns information about it.
  *
  * @dev_part_str is in the format:
  *	<dev>.<hw_part>:<part> where <dev> is the device number,
  *	<hw_part> is the optional hardware partition number and
  *	<part> is the partition number
  *
  * If ifname is "hostfs" then this function returns the sandbox host block
  * device.
  *
  * If ifname is ubi, then this function returns 0, with @info set to a
  * special UBI device.
  *
  * If @dev_part_str is NULL or empty or "-", then this function looks up
  * the "bootdevice" environment variable and uses that string instead.
  *
  * If the partition string is empty then the first partition is used. If the
  * partition string is "auto" then the first bootable partition is used.
  *
  * @ifname:	Interface name (e.g. "ide", "scsi")
  * @dev_part_str:	Device and partition string
  * @dev_desc:	Returns a pointer to the block device on success
  * @info:	Returns partition information
  * @allow_whole_dev:	true to allow the user to select partition 0
  *		(which means the whole device), false to require a valid
  *		partition number >= 1
  * @return partition number, or -1 on error
  *
  */
 int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
 			    struct blk_desc **dev_desc,
 			    disk_partition_t *info, int allow_whole_dev);
 extern const struct block_drvr block_drvr[];
 #else
 static inline struct blk_desc *blk_get_dev(const char *ifname, int dev)
 { return NULL; }
 static inline int mmc_select_hwpart(int dev_num, int hwpart) { return -1; }
 static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; }
 static inline struct blk_desc *host_get_dev(int dev) { return NULL; }

 static inline int part_get_info(struct blk_desc *dev_desc, int part,
 				disk_partition_t *info) { return -1; }
 static inline void part_print(struct blk_desc *dev_desc) {}
 static inline void part_init(struct blk_desc *dev_desc) {}
 static inline void dev_print(struct blk_desc *dev_desc) {}
 static inline int blk_get_device_by_str(const char *ifname, const char *dev_str,
 					struct blk_desc **dev_desc)
 { return -1; }
 static inline int blk_get_device_part_str(const char *ifname,
 					   const char *dev_part_str,
 					   struct blk_desc **dev_desc,
 					   disk_partition_t *info,
 					   int allow_whole_dev)
 { *dev_desc = NULL; return -1; }
 #endif

 /*
  * We don't support printing partition information in SPL and only support
  * getting partition information in a few cases.
  */
 #ifdef CONFIG_SPL_BUILD
 # define part_print_ptr(x)	NULL
 # if defined(CONFIG_SPL_EXT_SUPPORT) || defined(CONFIG_SPL_FAT_SUPPORT) || \
 	defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION)
 #  define part_get_info_ptr(x)	x
 # else
 #  define part_get_info_ptr(x)	NULL
 # endif
 #else
 #define part_print_ptr(x)	x
 #define part_get_info_ptr(x)	x
 #endif


 struct part_driver {
 	const char *name;
 	int part_type;

 	/**
 	 * get_info() - Get information about a partition
 	 *
 	 * @dev_desc:	Block device descriptor
 	 * @part:	Partition number (1 = first)
 	 * @info:	Returns partition information
 	 */
 	int (*get_info)(struct blk_desc *dev_desc, int part,
 			disk_partition_t *info);

 	/**
 	 * print() - Print partition information
 	 *
 	 * @dev_desc:	Block device descriptor
 	 */
 	void (*print)(struct blk_desc *dev_desc);

 	/**
 	 * test() - Test if a device contains this partition type
 	 *
 	 * @dev_desc:	Block device descriptor
 	 * @return 0 if the block device appears to contain this partition
 	 *	   type, -ve if not
 	 */
 	int (*test)(struct blk_desc *dev_desc);
 };

 /* Declare a new U-Boot partition 'driver' */
 #define U_BOOT_PART_TYPE(__name)					\
 	ll_entry_declare(struct part_driver, __name, part_driver)

 #ifdef CONFIG_EFI_PARTITION
 #include <part_efi.h>
 /* disk/part_efi.c */
 /**
  * part_get_info_efi_by_name() - Find the specified GPT partition table entry
  *
  * @param dev_desc - block device descriptor
  * @param gpt_name - the specified table entry name
  * @param info - returns the disk partition info
  *
  * @return - '0' on match, '-1' on no match, otherwise error
  */
 int part_get_info_efi_by_name(struct blk_desc *dev_desc,
 			      const char *name, disk_partition_t *info);

 /**
  * write_gpt_table() - Write the GUID Partition Table to disk
  *
  * @param dev_desc - block device descriptor
  * @param gpt_h - pointer to GPT header representation
  * @param gpt_e - pointer to GPT partition table entries
  *
  * @return - zero on success, otherwise error
  */
 int write_gpt_table(struct blk_desc *dev_desc,
 		  gpt_header *gpt_h, gpt_entry *gpt_e);

 /**
  * gpt_fill_pte(): Fill the GPT partition table entry
  *
  * @param gpt_h - GPT header representation
  * @param gpt_e - GPT partition table entries
  * @param partitions - list of partitions
  * @param parts - number of partitions
  *
  * @return zero on success
  */
 int gpt_fill_pte(gpt_header *gpt_h, gpt_entry *gpt_e,
 		disk_partition_t *partitions, int parts);

 /**
  * gpt_fill_header(): Fill the GPT header
  *
  * @param dev_desc - block device descriptor
  * @param gpt_h - GPT header representation
  * @param str_guid - disk guid string representation
  * @param parts_count - number of partitions
  *
  * @return - error on str_guid conversion error
  */
 int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
 		char *str_guid, int parts_count);

 /**
  * gpt_restore(): Restore GPT partition table
  *
  * @param dev_desc - block device descriptor
  * @param str_disk_guid - disk GUID
  * @param partitions - list of partitions
  * @param parts - number of partitions
  *
  * @return zero on success
  */
 int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
 		disk_partition_t *partitions, const int parts_count);

 /**
  * is_valid_gpt_buf() - Ensure that the Primary GPT information is valid
  *
  * @param dev_desc - block device descriptor
  * @param buf - buffer which contains the MBR and Primary GPT info
  *
  * @return - '0' on success, otherwise error
  */
 int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf);

 /**
  * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT
  *
  * @param dev_desc - block device descriptor
  * @param buf - buffer which contains the MBR and Primary GPT info
  *
  * @return - '0' on success, otherwise error
  */
 int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf);

 /**
  * gpt_verify_headers() - Function to read and CRC32 check of the GPT's header
  *                        and partition table entries (PTE)
  *
  * As a side effect if sets gpt_head and gpt_pte so they point to GPT data.
  *
  * @param dev_desc - block device descriptor
  * @param gpt_head - pointer to GPT header data read from medium
  * @param gpt_pte - pointer to GPT partition table enties read from medium
  *
  * @return - '0' on success, otherwise error
  */
 int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
 		       gpt_entry **gpt_pte);

 /**
  * gpt_verify_partitions() - Function to check if partitions' name, start and
  *                           size correspond to '$partitions' env variable
  *
  * This function checks if on medium stored GPT data is in sync with information
  * provided in '$partitions' environment variable. Specificially, name, start
  * and size of the partition is checked.
  *
  * @param dev_desc - block device descriptor
  * @param partitions - partition data read from '$partitions' env variable
  * @param parts - number of partitions read from '$partitions' env variable
  * @param gpt_head - pointer to GPT header data read from medium
  * @param gpt_pte - pointer to GPT partition table enties read from medium
  *
  * @return - '0' on success, otherwise error
  */
 int gpt_verify_partitions(struct blk_desc *dev_desc,
 			  disk_partition_t *partitions, int parts,
 			  gpt_header *gpt_head, gpt_entry **gpt_pte);
 #endif

 #endif /* _PART_H */
	/*
	* (C) Copyright 2000-2004
	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	*
	* SPDX-License-Identifier: GPL-2.0+
	*/
	#ifndef _PART_H
	#define _PART_H

	#include <blk.h>
	#include <ide.h>

	struct block_drvr {
	char *name;
	struct blk_desc* (*get_dev)(int dev);
	int (*select_hwpart)(int dev_num, int hwpart);
	};

	#define LOG2(x) (((x & 0xaaaaaaaa) ? 1 : 0) + ((x & 0xcccccccc) ? 2 : 0) + \
	((x & 0xf0f0f0f0) ? 4 : 0) + ((x & 0xff00ff00) ? 8 : 0) + \
	((x & 0xffff0000) ? 16 : 0))
	#define LOG2_INVALID(type) ((type)((sizeof(type)<<3)-1))

	/* Part types */
	#define PART_TYPE_UNKNOWN 0x00
	#define PART_TYPE_MAC 0x01
	#define PART_TYPE_DOS 0x02
	#define PART_TYPE_ISO 0x03
	#define PART_TYPE_AMIGA 0x04
	#define PART_TYPE_EFI 0x05

	/*
	* Type string for U-Boot bootable partitions
	*/
	#define BOOT_PART_TYPE "U-Boot" /* primary boot partition type */
	#define BOOT_PART_COMP "PPCBoot" /* PPCBoot compatibility type */

	/* device types */
	#define DEV_TYPE_UNKNOWN 0xff /* not connected */
	#define DEV_TYPE_HARDDISK 0x00 /* harddisk */
	#define DEV_TYPE_TAPE 0x01 /* Tape */
	#define DEV_TYPE_CDROM 0x05 /* CD-ROM */
	#define DEV_TYPE_OPDISK 0x07 /* optical disk */

	typedef struct disk_partition {
	lbaint_t start; /* # of first block in partition */
	lbaint_t size; /* number of blocks in partition */
	ulong blksz; /* block size in bytes */
	uchar name[32]; /* partition name */
	uchar type[32]; /* string type description */
	int bootable; /* Active/Bootable flag is set */
	#ifdef CONFIG_PARTITION_UUIDS
	char uuid[37]; /* filesystem UUID as string, if exists */
	#endif
	#ifdef CONFIG_PARTITION_TYPE_GUID
	char type_guid[37]; /* type GUID as string, if exists */
	#endif
	} disk_partition_t;

	/* Misc _get_dev functions */
	#ifdef CONFIG_PARTITIONS
	/**
	* blk_get_dev() - get a pointer to a block device given its type and number
	*
	* Each interface allocates its own devices and typically struct blk_desc is
	* contained with the interface's data structure. There is no global
	* numbering for block devices, so the interface name must be provided.
	*
	* @ifname: Interface name (e.g. "ide", "scsi")
	* @dev: Device number (0 for first device on that interface, 1 for
	* second, etc.
	* @return pointer to the block device, or NULL if not available, or an
	* error occurred.
	*/
	struct blk_desc blk_get_dev(const char ifname, int dev);

	/**
	* mmc_select_hwpart() - Select the MMC hardware partiion on an MMC device
	*
	* MMC devices can support partitioning at the hardware level. This is quite
	* separate from the normal idea of software-based partitions. MMC hardware
	* partitions must be explicitly selected. Once selected only the region of
	* the device covered by that partition is accessible.
	*
	* The MMC standard provides for two boot partitions (numbered 1 and 2),
	* rpmb (3), and up to 4 addition general-purpose partitions (4-7).
	*
	* @dev_num: Block device number (struct blk_desc->dev value)
	* @hwpart: Hardware partition number to select. 0 means the raw device,
	* 1 is the first partition, 2 is the second, etc.
	* @return 0 if OK, other value for an error
	*/
	int mmc_select_hwpart(int dev_num, int hwpart);
	struct blk_desc *mg_disk_get_dev(int dev);
	struct blk_desc *host_get_dev(int dev);
	int host_get_dev_err(int dev, struct blk_desc **blk_devp);

	/* disk/part.c */
	int part_get_info(struct blk_desc dev_desc, int part, disk_partition_t info);
	void part_print(struct blk_desc *dev_desc);
	void part_init(struct blk_desc *dev_desc);
	void dev_print(struct blk_desc *dev_desc);

	/**
	* blk_get_device_by_str() - Get a block device given its interface/hw partition
	*
	* Each interface allocates its own devices and typically struct blk_desc is
	* contained with the interface's data structure. There is no global
	* numbering for block devices, so the interface name must be provided.
	*
	* The hardware parition is not related to the normal software partitioning
	* of a device - each hardware partition is effectively a separately
	* accessible block device. When a hardware parition is selected on MMC the
	* other hardware partitions become inaccessible. The same block device is
	* used to access all hardware partitions, but its capacity may change when a
	* different hardware partition is selected.
	*
	* When a hardware partition number is given, the block device switches to
	* that hardware partition.
	*
	* @ifname: Interface name (e.g. "ide", "scsi")
	* @dev_str: Device and optional hw partition. This can either be a string
	* containing the device number (e.g. "2") or the device number
	* and hardware partition number (e.g. "2.4") for devices that
	* support it (currently only MMC).
	* @dev_desc: Returns a pointer to the block device on success
	* @return block device number (local to the interface), or -1 on error
	*/
	int blk_get_device_by_str(const char ifname, const char dev_str,
	struct blk_desc **dev_desc);

	/**
	* blk_get_device_part_str() - Get a block device and partition
	*
	* This calls blk_get_device_by_str() to look up a device. It also looks up
	* a partition and returns information about it.
	*
	* @dev_part_str is in the format:
	* <dev>.<hw_part>:<part> where <dev> is the device number,
	* <hw_part> is the optional hardware partition number and
	* <part> is the partition number
	*
	* If ifname is "hostfs" then this function returns the sandbox host block
	* device.
	*
	* If ifname is ubi, then this function returns 0, with @info set to a
	* special UBI device.
	*
	* If @dev_part_str is NULL or empty or "-", then this function looks up
	* the "bootdevice" environment variable and uses that string instead.
	*
	* If the partition string is empty then the first partition is used. If the
	* partition string is "auto" then the first bootable partition is used.
	*
	* @ifname: Interface name (e.g. "ide", "scsi")
	* @dev_part_str: Device and partition string
	* @dev_desc: Returns a pointer to the block device on success
	* @info: Returns partition information
	* @allow_whole_dev: true to allow the user to select partition 0
	* (which means the whole device), false to require a valid
	* partition number >= 1
	* @return partition number, or -1 on error
	*
	*/
	int blk_get_device_part_str(const char ifname, const char dev_part_str,
	struct blk_desc **dev_desc,
	disk_partition_t *info, int allow_whole_dev);
	extern const struct block_drvr block_drvr[];
	#else
	static inline struct blk_desc blk_get_dev(const char ifname, int dev)
	{ return NULL; }
	static inline int mmc_select_hwpart(int dev_num, int hwpart) { return -1; }
	static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; }
	static inline struct blk_desc *host_get_dev(int dev) { return NULL; }

	static inline int part_get_info(struct blk_desc *dev_desc, int part,
	disk_partition_t *info) { return -1; }
	static inline void part_print(struct blk_desc *dev_desc) {}
	static inline void part_init(struct blk_desc *dev_desc) {}
	static inline void dev_print(struct blk_desc *dev_desc) {}
	static inline int blk_get_device_by_str(const char ifname, const char dev_str,
	struct blk_desc **dev_desc)
	{ return -1; }
	static inline int blk_get_device_part_str(const char *ifname,
	const char *dev_part_str,
	struct blk_desc **dev_desc,
	disk_partition_t *info,
	int allow_whole_dev)
	{ *dev_desc = NULL; return -1; }
	#endif

	/*
	* We don't support printing partition information in SPL and only support
	* getting partition information in a few cases.
	*/
	#ifdef CONFIG_SPL_BUILD
	# define part_print_ptr(x) NULL
	# if defined(CONFIG_SPL_EXT_SUPPORT) \|\| defined(CONFIG_SPL_FAT_SUPPORT) \|\| \
	defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION)
	# define part_get_info_ptr(x) x
	# else
	# define part_get_info_ptr(x) NULL
	# endif
	#else
	#define part_print_ptr(x) x
	#define part_get_info_ptr(x) x
	#endif


	struct part_driver {
	const char *name;
	int part_type;

	/**
	* get_info() - Get information about a partition
	*
	* @dev_desc: Block device descriptor
	* @part: Partition number (1 = first)
	* @info: Returns partition information
	*/
	int (get_info)(struct blk_desc dev_desc, int part,
	disk_partition_t *info);

	/**
	* print() - Print partition information
	*
	* @dev_desc: Block device descriptor
	*/
	void (print)(struct blk_desc dev_desc);

	/**
	* test() - Test if a device contains this partition type
	*
	* @dev_desc: Block device descriptor
	* @return 0 if the block device appears to contain this partition
	* type, -ve if not
	*/
	int (test)(struct blk_desc dev_desc);
	};

	/* Declare a new U-Boot partition 'driver' */
	#define U_BOOT_PART_TYPE(__name) \
	ll_entry_declare(struct part_driver, __name, part_driver)

	#ifdef CONFIG_EFI_PARTITION
	#include <part_efi.h>
	/* disk/part_efi.c */
	/**
	* part_get_info_efi_by_name() - Find the specified GPT partition table entry
	*
	* @param dev_desc - block device descriptor
	* @param gpt_name - the specified table entry name
	* @param info - returns the disk partition info
	*
	* @return - '0' on match, '-1' on no match, otherwise error
	*/
	int part_get_info_efi_by_name(struct blk_desc *dev_desc,
	const char name, disk_partition_t info);

	/**
	* write_gpt_table() - Write the GUID Partition Table to disk
	*
	* @param dev_desc - block device descriptor
	* @param gpt_h - pointer to GPT header representation
	* @param gpt_e - pointer to GPT partition table entries
	*
	* @return - zero on success, otherwise error
	*/
	int write_gpt_table(struct blk_desc *dev_desc,
	gpt_header gpt_h, gpt_entry gpt_e);

	/**
	* gpt_fill_pte(): Fill the GPT partition table entry
	*
	* @param gpt_h - GPT header representation
	* @param gpt_e - GPT partition table entries
	* @param partitions - list of partitions
	* @param parts - number of partitions
	*
	* @return zero on success
	*/
	int gpt_fill_pte(gpt_header gpt_h, gpt_entry gpt_e,
	disk_partition_t *partitions, int parts);

	/**
	* gpt_fill_header(): Fill the GPT header
	*
	* @param dev_desc - block device descriptor
	* @param gpt_h - GPT header representation
	* @param str_guid - disk guid string representation
	* @param parts_count - number of partitions
	*
	* @return - error on str_guid conversion error
	*/
	int gpt_fill_header(struct blk_desc dev_desc, gpt_header gpt_h,
	char *str_guid, int parts_count);

	/**
	* gpt_restore(): Restore GPT partition table
	*
	* @param dev_desc - block device descriptor
	* @param str_disk_guid - disk GUID
	* @param partitions - list of partitions
	* @param parts - number of partitions
	*
	* @return zero on success
	*/
	int gpt_restore(struct blk_desc dev_desc, char str_disk_guid,
	disk_partition_t *partitions, const int parts_count);

	/**
	* is_valid_gpt_buf() - Ensure that the Primary GPT information is valid
	*
	* @param dev_desc - block device descriptor
	* @param buf - buffer which contains the MBR and Primary GPT info
	*
	* @return - '0' on success, otherwise error
	*/
	int is_valid_gpt_buf(struct blk_desc dev_desc, void buf);

	/**
	* write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT
	*
	* @param dev_desc - block device descriptor
	* @param buf - buffer which contains the MBR and Primary GPT info
	*
	* @return - '0' on success, otherwise error
	*/
	int write_mbr_and_gpt_partitions(struct blk_desc dev_desc, void buf);

	/**
	* gpt_verify_headers() - Function to read and CRC32 check of the GPT's header
	* and partition table entries (PTE)
	*
	* As a side effect if sets gpt_head and gpt_pte so they point to GPT data.
	*
	* @param dev_desc - block device descriptor
	* @param gpt_head - pointer to GPT header data read from medium
	* @param gpt_pte - pointer to GPT partition table enties read from medium
	*
	* @return - '0' on success, otherwise error
	*/
	int gpt_verify_headers(struct blk_desc dev_desc, gpt_header gpt_head,
	gpt_entry **gpt_pte);

	/**
	* gpt_verify_partitions() - Function to check if partitions' name, start and
	* size correspond to '$partitions' env variable
	*
	* This function checks if on medium stored GPT data is in sync with information
	* provided in '$partitions' environment variable. Specificially, name, start
	* and size of the partition is checked.
	*
	* @param dev_desc - block device descriptor
	* @param partitions - partition data read from '$partitions' env variable
	* @param parts - number of partitions read from '$partitions' env variable
	* @param gpt_head - pointer to GPT header data read from medium
	* @param gpt_pte - pointer to GPT partition table enties read from medium
	*
	* @return - '0' on success, otherwise error
	*/
	int gpt_verify_partitions(struct blk_desc *dev_desc,
	disk_partition_t *partitions, int parts,
	gpt_header gpt_head, gpt_entry *gpt_pte);
	#endif

	#endif /* _PART_H */