drivers/mtd/ubi/debug.h - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * Copyright (c) International Business Machines Corp., 2006
  *
  * Author: Artem Bityutskiy (Битюцкий Артём)
  */

 #ifndef __UBI_DEBUG_H__
 #define __UBI_DEBUG_H__

 void ubi_dump_flash(struct ubi_device *ubi, int pnum, int offset, int len);
 void ubi_dump_ec_hdr(const struct ubi_ec_hdr *ec_hdr);
 void ubi_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr);

 #include <linux/random.h>

 #define ubi_assert(expr)  do {                                               \
 	if (unlikely(!(expr))) {                                             \
 		pr_crit("UBI assert failed in %s at %u (pid %d)\n",          \
 		       __func__, __LINE__, current->pid);                    \
 		dump_stack();                                                \
 	}                                                                    \
 } while (0)

 #define ubi_dbg_print_hex_dump(l, ps, pt, r, g, b, len, a)                   \
 		print_hex_dump(l, ps, pt, r, g, b, len, a)

 #define ubi_dbg_msg(type, fmt, ...) \
 	pr_debug("UBI DBG " type " (pid %d): " fmt "\n", current->pid,       \
 		 ##__VA_ARGS__)

 /* General debugging messages */
 #define dbg_gen(fmt, ...) ubi_dbg_msg("gen", fmt, ##__VA_ARGS__)
 /* Messages from the eraseblock association sub-system */
 #define dbg_eba(fmt, ...) ubi_dbg_msg("eba", fmt, ##__VA_ARGS__)
 /* Messages from the wear-leveling sub-system */
 #define dbg_wl(fmt, ...)  ubi_dbg_msg("wl", fmt, ##__VA_ARGS__)
 /* Messages from the input/output sub-system */
 #define dbg_io(fmt, ...)  ubi_dbg_msg("io", fmt, ##__VA_ARGS__)
 /* Initialization and build messages */
 #define dbg_bld(fmt, ...) ubi_dbg_msg("bld", fmt, ##__VA_ARGS__)

 void ubi_dump_vol_info(const struct ubi_volume *vol);
 void ubi_dump_vtbl_record(const struct ubi_vtbl_record *r, int idx);
 void ubi_dump_av(const struct ubi_ainf_volume *av);
 void ubi_dump_aeb(const struct ubi_ainf_peb *aeb, int type);
 void ubi_dump_mkvol_req(const struct ubi_mkvol_req *req);
 int ubi_self_check_all_ff(struct ubi_device *ubi, int pnum, int offset,
 			  int len);
 int ubi_debugfs_init(void);
 void ubi_debugfs_exit(void);
 int ubi_debugfs_init_dev(struct ubi_device *ubi);
 void ubi_debugfs_exit_dev(struct ubi_device *ubi);

 /**
  * The following function is a legacy implementation of UBI fault-injection
  * hook. When using more powerful fault injection capabilities, the legacy
  * fault injection interface should be retained.
  */
 int ubi_dbg_power_cut(struct ubi_device *ubi, int caller);

 static inline int ubi_dbg_bitflip(const struct ubi_device *ubi)
 {
 	if (ubi->dbg.emulate_bitflips)
 		return !get_random_u32_below(200);
 	return 0;
 }

 static inline int ubi_dbg_write_failure(const struct ubi_device *ubi)
 {
 	if (ubi->dbg.emulate_io_failures)
 		return !get_random_u32_below(500);
 	return 0;
 }

 static inline int ubi_dbg_erase_failure(const struct ubi_device *ubi)
 {
 	if (ubi->dbg.emulate_io_failures)
 		return !get_random_u32_below(400);
 	return 0;
 }

 /**
  * MASK_XXX: Mask for emulate_failures in ubi_debug_info.The mask is used to
  * precisely control the type and process of fault injection.
  */
 /* Emulate a power cut when writing EC/VID header */
 #define MASK_POWER_CUT_EC			(1 << 0)
 #define MASK_POWER_CUT_VID			(1 << 1)
 /* Emulate a power cut when writing data*/
 #define MASK_POWER_CUT_DATA			(1 << 2)
 /* Emulate bit-flips */
 #define MASK_BITFLIPS				(1 << 3)
 /* Emulate ecc error */
 #define MASK_ECCERR				(1 << 4)
 /* Emulates -EIO during data read */
 #define MASK_READ_FAILURE			(1 << 5)
 #define MASK_READ_FAILURE_EC			(1 << 6)
 #define MASK_READ_FAILURE_VID			(1 << 7)
 /* Emulates -EIO during data write */
 #define MASK_WRITE_FAILURE			(1 << 8)
 /* Emulates -EIO during erase a PEB*/
 #define MASK_ERASE_FAILURE			(1 << 9)
 /* Return UBI_IO_FF when reading EC/VID header */
 #define MASK_IO_FF_EC				(1 << 10)
 #define MASK_IO_FF_VID				(1 << 11)
 /* Return UBI_IO_FF_BITFLIPS when reading EC/VID header */
 #define MASK_IO_FF_BITFLIPS_EC			(1 << 12)
 #define MASK_IO_FF_BITFLIPS_VID			(1 << 13)
 /* Return UBI_IO_BAD_HDR when reading EC/VID header */
 #define MASK_BAD_HDR_EC				(1 << 14)
 #define MASK_BAD_HDR_VID			(1 << 15)
 /* Return UBI_IO_BAD_HDR_EBADMSG when reading EC/VID header */
 #define MASK_BAD_HDR_EBADMSG_EC			(1 << 16)
 #define MASK_BAD_HDR_EBADMSG_VID		(1 << 17)

 #ifdef CONFIG_MTD_UBI_FAULT_INJECTION

 extern bool should_fail_eccerr(void);
 extern bool should_fail_bitflips(void);
 extern bool should_fail_read_failure(void);
 extern bool should_fail_write_failure(void);
 extern bool should_fail_erase_failure(void);
 extern bool should_fail_power_cut(void);
 extern bool should_fail_io_ff(void);
 extern bool should_fail_io_ff_bitflips(void);
 extern bool should_fail_bad_hdr(void);
 extern bool should_fail_bad_hdr_ebadmsg(void);

 static inline bool ubi_dbg_fail_bitflip(const struct ubi_device *ubi)
 {
 	if (ubi->dbg.emulate_failures & MASK_BITFLIPS)
 		return should_fail_bitflips();
 	return false;
 }

 static inline bool ubi_dbg_fail_write(const struct ubi_device *ubi)
 {
 	if (ubi->dbg.emulate_failures & MASK_WRITE_FAILURE)
 		return should_fail_write_failure();
 	return false;
 }

 static inline bool ubi_dbg_fail_erase(const struct ubi_device *ubi)
 {
 	if (ubi->dbg.emulate_failures & MASK_ERASE_FAILURE)
 		return should_fail_erase_failure();
 	return false;
 }

 static inline bool ubi_dbg_fail_power_cut(const struct ubi_device *ubi,
 					  unsigned int caller)
 {
 	if (ubi->dbg.emulate_failures & caller)
 		return should_fail_power_cut();
 	return false;
 }

 static inline bool ubi_dbg_fail_read(const struct ubi_device *ubi,
 				     unsigned int caller)
 {
 	if (ubi->dbg.emulate_failures & caller)
 		return should_fail_read_failure();
 	return false;
 }

 static inline bool ubi_dbg_fail_eccerr(const struct ubi_device *ubi)
 {
 	if (ubi->dbg.emulate_failures & MASK_ECCERR)
 		return should_fail_eccerr();
 	return false;
 }

 static inline bool ubi_dbg_fail_ff(const struct ubi_device *ubi,
 				   unsigned int caller)
 {
 	if (ubi->dbg.emulate_failures & caller)
 		return should_fail_io_ff();
 	return false;
 }

 static inline bool ubi_dbg_fail_ff_bitflips(const struct ubi_device *ubi,
 					    unsigned int caller)
 {
 	if (ubi->dbg.emulate_failures & caller)
 		return should_fail_io_ff_bitflips();
 	return false;
 }

 static inline bool ubi_dbg_fail_bad_hdr(const struct ubi_device *ubi,
 					 unsigned int caller)
 {
 	if (ubi->dbg.emulate_failures & caller)
 		return should_fail_bad_hdr();
 	return false;
 }

 static inline bool ubi_dbg_fail_bad_hdr_ebadmsg(const struct ubi_device *ubi,
 						 unsigned int caller)
 {
 	if (ubi->dbg.emulate_failures & caller)
 		return should_fail_bad_hdr_ebadmsg();
 	return false;
 }
 #else /* CONFIG_MTD_UBI_FAULT_INJECTION */

 #define ubi_dbg_fail_bitflip(u)             false
 #define ubi_dbg_fail_write(u)               false
 #define ubi_dbg_fail_erase(u)               false
 #define ubi_dbg_fail_power_cut(u, c)        false
 #define ubi_dbg_fail_read(u, c)             false
 #define ubi_dbg_fail_eccerr(u)              false
 #define ubi_dbg_fail_ff(u, c)               false
 #define ubi_dbg_fail_ff_bitflips(u, v)      false
 #define ubi_dbg_fail_bad_hdr(u, c)          false
 #define ubi_dbg_fail_bad_hdr_ebadmsg(u, c)  false

 #endif

 /**
  * ubi_dbg_is_power_cut - if it is time to emulate power cut.
  * @ubi: UBI device description object
  *
  * Returns true if power cut should be emulated, otherwise returns false.
  */
 static inline bool ubi_dbg_is_power_cut(struct ubi_device *ubi,
 					unsigned int caller)
 {
 	if (ubi_dbg_power_cut(ubi, caller))
 		return true;
 	return ubi_dbg_fail_power_cut(ubi, caller);
 }

 /**
  * ubi_dbg_is_bitflip - if it is time to emulate a bit-flip.
  * @ubi: UBI device description object
  *
  * Returns true if a bit-flip should be emulated, otherwise returns false.
  */
 static inline bool ubi_dbg_is_bitflip(const struct ubi_device *ubi)
 {
 	if (ubi_dbg_bitflip(ubi))
 		return true;
 	return ubi_dbg_fail_bitflip(ubi);
 }

 /**
  * ubi_dbg_is_write_failure - if it is time to emulate a write failure.
  * @ubi: UBI device description object
  *
  * Returns true if a write failure should be emulated, otherwise returns
  * false.
  */
 static inline bool ubi_dbg_is_write_failure(const struct ubi_device *ubi)
 {
 	if (ubi_dbg_write_failure(ubi))
 		return true;
 	return ubi_dbg_fail_write(ubi);
 }

 /**
  * ubi_dbg_is_erase_failure - if its time to emulate an erase failure.
  * @ubi: UBI device description object
  *
  * Returns true if an erase failure should be emulated, otherwise returns
  * false.
  */
 static inline bool ubi_dbg_is_erase_failure(const struct ubi_device *ubi)
 {
 	if (ubi_dbg_erase_failure(ubi))
 		return true;
 	return ubi_dbg_fail_erase(ubi);
 }

 /**
  * ubi_dbg_is_eccerr - if it is time to emulate ECC error.
  * @ubi: UBI device description object
  *
  * Returns true if a ECC error should be emulated, otherwise returns false.
  */
 static inline bool ubi_dbg_is_eccerr(const struct ubi_device *ubi)
 {
 	return ubi_dbg_fail_eccerr(ubi);
 }

 /**
  * ubi_dbg_is_read_failure - if it is time to emulate a read failure.
  * @ubi: UBI device description object
  *
  * Returns true if a read failure should be emulated, otherwise returns
  * false.
  */
 static inline bool ubi_dbg_is_read_failure(const struct ubi_device *ubi,
 					   unsigned int caller)
 {
 	return ubi_dbg_fail_read(ubi, caller);
 }

 /**
  * ubi_dbg_is_ff - if it is time to emulate that read region is only 0xFF.
  * @ubi: UBI device description object
  *
  * Returns true if read region should be emulated 0xFF, otherwise
  * returns false.
  */
 static inline bool ubi_dbg_is_ff(const struct ubi_device *ubi,
 				 unsigned int caller)
 {
 	return ubi_dbg_fail_ff(ubi, caller);
 }

 /**
  * ubi_dbg_is_ff_bitflips - if it is time to emulate that read region is only 0xFF
  * with error reported by the MTD driver
  *
  * @ubi: UBI device description object
  *
  * Returns true if read region should be emulated 0xFF and error
  * reported by the MTD driver, otherwise returns false.
  */
 static inline bool ubi_dbg_is_ff_bitflips(const struct ubi_device *ubi,
 					  unsigned int caller)
 {
 	return ubi_dbg_fail_ff_bitflips(ubi, caller);
 }

 /**
  * ubi_dbg_is_bad_hdr - if it is time to emulate a bad header
  * @ubi: UBI device description object
  *
  * Returns true if a bad header error should be emulated, otherwise
  * returns false.
  */
 static inline bool ubi_dbg_is_bad_hdr(const struct ubi_device *ubi,
 				      unsigned int caller)
 {
 	return ubi_dbg_fail_bad_hdr(ubi, caller);
 }

 /**
  * ubi_dbg_is_bad_hdr_ebadmsg - if it is time to emulate a bad header with
  * ECC error.
  *
  * @ubi: UBI device description object
  *
  * Returns true if a bad header with ECC error should be emulated, otherwise
  * returns false.
  */
 static inline bool ubi_dbg_is_bad_hdr_ebadmsg(const struct ubi_device *ubi,
 					      unsigned int caller)
 {
 	return ubi_dbg_fail_bad_hdr_ebadmsg(ubi, caller);
 }

 /**
  * ubi_dbg_is_bgt_disabled - if the background thread is disabled.
  * @ubi: UBI device description object
  *
  * Returns non-zero if the UBI background thread is disabled for testing
  * purposes.
  */
 static inline int ubi_dbg_is_bgt_disabled(const struct ubi_device *ubi)
 {
 	return ubi->dbg.disable_bgt;
 }

 static inline int ubi_dbg_chk_io(const struct ubi_device *ubi)
 {
 	return ubi->dbg.chk_io;
 }

 static inline int ubi_dbg_chk_gen(const struct ubi_device *ubi)
 {
 	return ubi->dbg.chk_gen;
 }

 static inline int ubi_dbg_chk_fastmap(const struct ubi_device *ubi)
 {
 	return ubi->dbg.chk_fastmap;
 }

 static inline void ubi_enable_dbg_chk_fastmap(struct ubi_device *ubi)
 {
 	ubi->dbg.chk_fastmap = 1;
 }

 #endif /* !__UBI_DEBUG_H__ */
	/* SPDX-License-Identifier: GPL-2.0-or-later */
	/*
	* Copyright (c) International Business Machines Corp., 2006
	*
	* Author: Artem Bityutskiy (Битюцкий Артём)
	*/

	#ifndef __UBI_DEBUG_H__
	#define __UBI_DEBUG_H__

	void ubi_dump_flash(struct ubi_device *ubi, int pnum, int offset, int len);
	void ubi_dump_ec_hdr(const struct ubi_ec_hdr *ec_hdr);
	void ubi_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr);

	#include <linux/random.h>

	#define ubi_assert(expr) do { \
	if (unlikely(!(expr))) { \
	pr_crit("UBI assert failed in %s at %u (pid %d)\n", \
	__func__, __LINE__, current->pid); \
	dump_stack(); \
	} \
	} while (0)

	#define ubi_dbg_print_hex_dump(l, ps, pt, r, g, b, len, a) \
	print_hex_dump(l, ps, pt, r, g, b, len, a)

	#define ubi_dbg_msg(type, fmt, ...) \
	pr_debug("UBI DBG " type " (pid %d): " fmt "\n", current->pid, \
	##__VA_ARGS__)

	/* General debugging messages */
	#define dbg_gen(fmt, ...) ubi_dbg_msg("gen", fmt, ##__VA_ARGS__)
	/* Messages from the eraseblock association sub-system */
	#define dbg_eba(fmt, ...) ubi_dbg_msg("eba", fmt, ##__VA_ARGS__)
	/* Messages from the wear-leveling sub-system */
	#define dbg_wl(fmt, ...) ubi_dbg_msg("wl", fmt, ##__VA_ARGS__)
	/* Messages from the input/output sub-system */
	#define dbg_io(fmt, ...) ubi_dbg_msg("io", fmt, ##__VA_ARGS__)
	/* Initialization and build messages */
	#define dbg_bld(fmt, ...) ubi_dbg_msg("bld", fmt, ##__VA_ARGS__)

	void ubi_dump_vol_info(const struct ubi_volume *vol);
	void ubi_dump_vtbl_record(const struct ubi_vtbl_record *r, int idx);
	void ubi_dump_av(const struct ubi_ainf_volume *av);
	void ubi_dump_aeb(const struct ubi_ainf_peb *aeb, int type);
	void ubi_dump_mkvol_req(const struct ubi_mkvol_req *req);
	int ubi_self_check_all_ff(struct ubi_device *ubi, int pnum, int offset,
	int len);
	int ubi_debugfs_init(void);
	void ubi_debugfs_exit(void);
	int ubi_debugfs_init_dev(struct ubi_device *ubi);
	void ubi_debugfs_exit_dev(struct ubi_device *ubi);

	/**
	* The following function is a legacy implementation of UBI fault-injection
	* hook. When using more powerful fault injection capabilities, the legacy
	* fault injection interface should be retained.
	*/
	int ubi_dbg_power_cut(struct ubi_device *ubi, int caller);

	static inline int ubi_dbg_bitflip(const struct ubi_device *ubi)
	{
	if (ubi->dbg.emulate_bitflips)
	return !get_random_u32_below(200);
	return 0;
	}

	static inline int ubi_dbg_write_failure(const struct ubi_device *ubi)
	{
	if (ubi->dbg.emulate_io_failures)
	return !get_random_u32_below(500);
	return 0;
	}

	static inline int ubi_dbg_erase_failure(const struct ubi_device *ubi)
	{
	if (ubi->dbg.emulate_io_failures)
	return !get_random_u32_below(400);
	return 0;
	}

	/**
	* MASK_XXX: Mask for emulate_failures in ubi_debug_info.The mask is used to
	* precisely control the type and process of fault injection.
	*/
	/* Emulate a power cut when writing EC/VID header */
	#define MASK_POWER_CUT_EC (1 << 0)
	#define MASK_POWER_CUT_VID (1 << 1)
	/* Emulate a power cut when writing data*/
	#define MASK_POWER_CUT_DATA (1 << 2)
	/* Emulate bit-flips */
	#define MASK_BITFLIPS (1 << 3)
	/* Emulate ecc error */
	#define MASK_ECCERR (1 << 4)
	/* Emulates -EIO during data read */
	#define MASK_READ_FAILURE (1 << 5)
	#define MASK_READ_FAILURE_EC (1 << 6)
	#define MASK_READ_FAILURE_VID (1 << 7)
	/* Emulates -EIO during data write */
	#define MASK_WRITE_FAILURE (1 << 8)
	/* Emulates -EIO during erase a PEB*/
	#define MASK_ERASE_FAILURE (1 << 9)
	/* Return UBI_IO_FF when reading EC/VID header */
	#define MASK_IO_FF_EC (1 << 10)
	#define MASK_IO_FF_VID (1 << 11)
	/* Return UBI_IO_FF_BITFLIPS when reading EC/VID header */
	#define MASK_IO_FF_BITFLIPS_EC (1 << 12)
	#define MASK_IO_FF_BITFLIPS_VID (1 << 13)
	/* Return UBI_IO_BAD_HDR when reading EC/VID header */
	#define MASK_BAD_HDR_EC (1 << 14)
	#define MASK_BAD_HDR_VID (1 << 15)
	/* Return UBI_IO_BAD_HDR_EBADMSG when reading EC/VID header */
	#define MASK_BAD_HDR_EBADMSG_EC (1 << 16)
	#define MASK_BAD_HDR_EBADMSG_VID (1 << 17)

	#ifdef CONFIG_MTD_UBI_FAULT_INJECTION

	extern bool should_fail_eccerr(void);
	extern bool should_fail_bitflips(void);
	extern bool should_fail_read_failure(void);
	extern bool should_fail_write_failure(void);
	extern bool should_fail_erase_failure(void);
	extern bool should_fail_power_cut(void);
	extern bool should_fail_io_ff(void);
	extern bool should_fail_io_ff_bitflips(void);
	extern bool should_fail_bad_hdr(void);
	extern bool should_fail_bad_hdr_ebadmsg(void);

	static inline bool ubi_dbg_fail_bitflip(const struct ubi_device *ubi)
	{
	if (ubi->dbg.emulate_failures & MASK_BITFLIPS)
	return should_fail_bitflips();
	return false;
	}

	static inline bool ubi_dbg_fail_write(const struct ubi_device *ubi)
	{
	if (ubi->dbg.emulate_failures & MASK_WRITE_FAILURE)
	return should_fail_write_failure();
	return false;
	}

	static inline bool ubi_dbg_fail_erase(const struct ubi_device *ubi)
	{
	if (ubi->dbg.emulate_failures & MASK_ERASE_FAILURE)
	return should_fail_erase_failure();
	return false;
	}

	static inline bool ubi_dbg_fail_power_cut(const struct ubi_device *ubi,
	unsigned int caller)
	{
	if (ubi->dbg.emulate_failures & caller)
	return should_fail_power_cut();
	return false;
	}

	static inline bool ubi_dbg_fail_read(const struct ubi_device *ubi,
	unsigned int caller)
	{
	if (ubi->dbg.emulate_failures & caller)
	return should_fail_read_failure();
	return false;
	}

	static inline bool ubi_dbg_fail_eccerr(const struct ubi_device *ubi)
	{
	if (ubi->dbg.emulate_failures & MASK_ECCERR)
	return should_fail_eccerr();
	return false;
	}

	static inline bool ubi_dbg_fail_ff(const struct ubi_device *ubi,
	unsigned int caller)
	{
	if (ubi->dbg.emulate_failures & caller)
	return should_fail_io_ff();
	return false;
	}

	static inline bool ubi_dbg_fail_ff_bitflips(const struct ubi_device *ubi,
	unsigned int caller)
	{
	if (ubi->dbg.emulate_failures & caller)
	return should_fail_io_ff_bitflips();
	return false;
	}

	static inline bool ubi_dbg_fail_bad_hdr(const struct ubi_device *ubi,
	unsigned int caller)
	{
	if (ubi->dbg.emulate_failures & caller)
	return should_fail_bad_hdr();
	return false;
	}

	static inline bool ubi_dbg_fail_bad_hdr_ebadmsg(const struct ubi_device *ubi,
	unsigned int caller)
	{
	if (ubi->dbg.emulate_failures & caller)
	return should_fail_bad_hdr_ebadmsg();
	return false;
	}
	#else /* CONFIG_MTD_UBI_FAULT_INJECTION */

	#define ubi_dbg_fail_bitflip(u) false
	#define ubi_dbg_fail_write(u) false
	#define ubi_dbg_fail_erase(u) false
	#define ubi_dbg_fail_power_cut(u, c) false
	#define ubi_dbg_fail_read(u, c) false
	#define ubi_dbg_fail_eccerr(u) false
	#define ubi_dbg_fail_ff(u, c) false
	#define ubi_dbg_fail_ff_bitflips(u, v) false
	#define ubi_dbg_fail_bad_hdr(u, c) false
	#define ubi_dbg_fail_bad_hdr_ebadmsg(u, c) false

	#endif

	/**
	* ubi_dbg_is_power_cut - if it is time to emulate power cut.
	* @ubi: UBI device description object
	*
	* Returns true if power cut should be emulated, otherwise returns false.
	*/
	static inline bool ubi_dbg_is_power_cut(struct ubi_device *ubi,
	unsigned int caller)
	{
	if (ubi_dbg_power_cut(ubi, caller))
	return true;
	return ubi_dbg_fail_power_cut(ubi, caller);
	}

	/**
	* ubi_dbg_is_bitflip - if it is time to emulate a bit-flip.
	* @ubi: UBI device description object
	*
	* Returns true if a bit-flip should be emulated, otherwise returns false.
	*/
	static inline bool ubi_dbg_is_bitflip(const struct ubi_device *ubi)
	{
	if (ubi_dbg_bitflip(ubi))
	return true;
	return ubi_dbg_fail_bitflip(ubi);
	}

	/**
	* ubi_dbg_is_write_failure - if it is time to emulate a write failure.
	* @ubi: UBI device description object
	*
	* Returns true if a write failure should be emulated, otherwise returns
	* false.
	*/
	static inline bool ubi_dbg_is_write_failure(const struct ubi_device *ubi)
	{
	if (ubi_dbg_write_failure(ubi))
	return true;
	return ubi_dbg_fail_write(ubi);
	}

	/**
	* ubi_dbg_is_erase_failure - if its time to emulate an erase failure.
	* @ubi: UBI device description object
	*
	* Returns true if an erase failure should be emulated, otherwise returns
	* false.
	*/
	static inline bool ubi_dbg_is_erase_failure(const struct ubi_device *ubi)
	{
	if (ubi_dbg_erase_failure(ubi))
	return true;
	return ubi_dbg_fail_erase(ubi);
	}

	/**
	* ubi_dbg_is_eccerr - if it is time to emulate ECC error.
	* @ubi: UBI device description object
	*
	* Returns true if a ECC error should be emulated, otherwise returns false.
	*/
	static inline bool ubi_dbg_is_eccerr(const struct ubi_device *ubi)
	{
	return ubi_dbg_fail_eccerr(ubi);
	}

	/**
	* ubi_dbg_is_read_failure - if it is time to emulate a read failure.
	* @ubi: UBI device description object
	*
	* Returns true if a read failure should be emulated, otherwise returns
	* false.
	*/
	static inline bool ubi_dbg_is_read_failure(const struct ubi_device *ubi,
	unsigned int caller)
	{
	return ubi_dbg_fail_read(ubi, caller);
	}

	/**
	* ubi_dbg_is_ff - if it is time to emulate that read region is only 0xFF.
	* @ubi: UBI device description object
	*
	* Returns true if read region should be emulated 0xFF, otherwise
	* returns false.
	*/
	static inline bool ubi_dbg_is_ff(const struct ubi_device *ubi,
	unsigned int caller)
	{
	return ubi_dbg_fail_ff(ubi, caller);
	}

	/**
	* ubi_dbg_is_ff_bitflips - if it is time to emulate that read region is only 0xFF
	* with error reported by the MTD driver
	*
	* @ubi: UBI device description object
	*
	* Returns true if read region should be emulated 0xFF and error
	* reported by the MTD driver, otherwise returns false.
	*/
	static inline bool ubi_dbg_is_ff_bitflips(const struct ubi_device *ubi,
	unsigned int caller)
	{
	return ubi_dbg_fail_ff_bitflips(ubi, caller);
	}

	/**
	* ubi_dbg_is_bad_hdr - if it is time to emulate a bad header
	* @ubi: UBI device description object
	*
	* Returns true if a bad header error should be emulated, otherwise
	* returns false.
	*/
	static inline bool ubi_dbg_is_bad_hdr(const struct ubi_device *ubi,
	unsigned int caller)
	{
	return ubi_dbg_fail_bad_hdr(ubi, caller);
	}

	/**
	* ubi_dbg_is_bad_hdr_ebadmsg - if it is time to emulate a bad header with
	* ECC error.
	*
	* @ubi: UBI device description object
	*
	* Returns true if a bad header with ECC error should be emulated, otherwise
	* returns false.
	*/
	static inline bool ubi_dbg_is_bad_hdr_ebadmsg(const struct ubi_device *ubi,
	unsigned int caller)
	{
	return ubi_dbg_fail_bad_hdr_ebadmsg(ubi, caller);
	}

	/**
	* ubi_dbg_is_bgt_disabled - if the background thread is disabled.
	* @ubi: UBI device description object
	*
	* Returns non-zero if the UBI background thread is disabled for testing
	* purposes.
	*/
	static inline int ubi_dbg_is_bgt_disabled(const struct ubi_device *ubi)
	{
	return ubi->dbg.disable_bgt;
	}

	static inline int ubi_dbg_chk_io(const struct ubi_device *ubi)
	{
	return ubi->dbg.chk_io;
	}

	static inline int ubi_dbg_chk_gen(const struct ubi_device *ubi)
	{
	return ubi->dbg.chk_gen;
	}

	static inline int ubi_dbg_chk_fastmap(const struct ubi_device *ubi)
	{
	return ubi->dbg.chk_fastmap;
	}

	static inline void ubi_enable_dbg_chk_fastmap(struct ubi_device *ubi)
	{
	ubi->dbg.chk_fastmap = 1;
	}

	#endif /* !__UBI_DEBUG_H__ */