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Commit 4f3a29da authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'linux-next' of git://git.infradead.org/ubi-2.6 

* 'linux-next' of git://git.infradead.org/ubi-2.6:
  UBI: tighten the corrupted PEB criteria
  UBI: fix check_data_ff return code
  UBI: remember copy_flag while scanning
  UBI: preserve corrupted PEBs
  UBI: add truly corrupted PEBs to corrupted list
  UBI: introduce debugging helper function
  UBI: make check_pattern function non-static
  UBI: do not put eraseblocks to the corrupted list unnecessarily
  UBI: separate out corrupted list
  UBI: change cascade of ifs to switch statements
  UBI: rename a local variable
  UBI: handle bit-flips when no header found
  UBI: remove duplicate IO error codes
  UBI: rename IO error code
  UBI: fix small 80 characters limit style issue
  UBI: cleanup and simplify Kconfig
parents 06d36293 45aafd32

drivers/mtd/ubi/Kconfig

+6 −11
Original line number Diff line number Diff line 
menu "UBI - Unsorted block images"

	depends on MTD



config MTD_UBI

	tristate "Enable UBI"

	depends on MTD

menuconfig MTD_UBI

	tristate "Enable UBI - Unsorted block images"

	select CRC32

	help

	  UBI is a software layer above MTD layer which admits of LVM-like
@@ -12,11 +8,12 @@ config MTD_UBI 
	  capabilities. Please, consult the MTD web site for more details

	  (www.linux-mtd.infradead.org).



if MTD_UBI



config MTD_UBI_WL_THRESHOLD

	int "UBI wear-leveling threshold"

	default 4096

	range 2 65536

	depends on MTD_UBI

	help

	  This parameter defines the maximum difference between the highest

	  erase counter value and the lowest erase counter value of eraseblocks
@@ -34,7 +31,6 @@ config MTD_UBI_BEB_RESERVE 
	int "Percentage of reserved eraseblocks for bad eraseblocks handling"

	default 1

	range 0 25

	depends on MTD_UBI

	help

	  If the MTD device admits of bad eraseblocks (e.g. NAND flash), UBI

	  reserves some amount of physical eraseblocks to handle new bad
@@ -48,8 +44,6 @@ config MTD_UBI_BEB_RESERVE 


config MTD_UBI_GLUEBI

	tristate "MTD devices emulation driver (gluebi)"

	default n

	depends on MTD_UBI

	help

	   This option enables gluebi - an additional driver which emulates MTD

	   devices on top of UBI volumes: for each UBI volumes an MTD device is
@@ -59,4 +53,5 @@ config MTD_UBI_GLUEBI 
	   software.



source "drivers/mtd/ubi/Kconfig.debug"

endmenu
 


endif # MTD_UBI

drivers/mtd/ubi/Kconfig.debug

+4 −25
Original line number Diff line number Diff line 
comment "UBI debugging options"

	depends on MTD_UBI



config MTD_UBI_DEBUG

	bool "UBI debugging"

	depends on SYSFS

	depends on MTD_UBI

	select DEBUG_FS

	select KALLSYMS_ALL if KALLSYMS && DEBUG_KERNEL

	help

	  This option enables UBI debugging.



if MTD_UBI_DEBUG



config MTD_UBI_DEBUG_MSG

	bool "UBI debugging messages"

	depends on MTD_UBI_DEBUG

	default n

	help

	  This option enables UBI debugging messages.



config MTD_UBI_DEBUG_PARANOID

	bool "Extra self-checks"

	default n

	depends on MTD_UBI_DEBUG

	help

	  This option enables extra checks in UBI code. Note this slows UBI down

	  significantly.



config MTD_UBI_DEBUG_DISABLE_BGT

	bool "Do not enable the UBI background thread"

	depends on MTD_UBI_DEBUG

	default n

	help

	  This option switches the background thread off by default. The thread

	  may be also be enabled/disabled via UBI sysfs.



config MTD_UBI_DEBUG_EMULATE_BITFLIPS

	bool "Emulate flash bit-flips"

	depends on MTD_UBI_DEBUG

	default n

	help

	  This option emulates bit-flips with probability 1/50, which in turn

	  causes scrubbing. Useful for debugging and stressing UBI.



config MTD_UBI_DEBUG_EMULATE_WRITE_FAILURES

	bool "Emulate flash write failures"

	depends on MTD_UBI_DEBUG

	default n

	help

	  This option emulates write failures with probability 1/100. Useful for

	  debugging and testing how UBI handlines errors.



config MTD_UBI_DEBUG_EMULATE_ERASE_FAILURES

	bool "Emulate flash erase failures"

	depends on MTD_UBI_DEBUG

	default n

	help

	  This option emulates erase failures with probability 1/100. Useful for

	  debugging and testing how UBI handlines errors.



menu "Additional UBI debugging messages"

	depends on MTD_UBI_DEBUG

comment "Additional UBI debugging messages"



config MTD_UBI_DEBUG_MSG_BLD

	bool "Additional UBI initialization and build messages"

	default n

	depends on MTD_UBI_DEBUG

	help

	  This option enables detailed UBI initialization and device build

	  debugging messages.



config MTD_UBI_DEBUG_MSG_EBA

	bool "Eraseblock association unit messages"

	default n

	depends on MTD_UBI_DEBUG

	help

	  This option enables debugging messages from the UBI eraseblock

	  association unit.



config MTD_UBI_DEBUG_MSG_WL

	bool "Wear-leveling unit messages"

	default n

	depends on MTD_UBI_DEBUG

	help

	  This option enables debugging messages from the UBI wear-leveling

	  unit.



config MTD_UBI_DEBUG_MSG_IO

	bool "Input/output unit messages"

	default n

	depends on MTD_UBI_DEBUG

	help

	  This option enables debugging messages from the UBI input/output unit.



endmenu # UBI debugging messages
 
endif # MTD_UBI_DEBUG

drivers/mtd/ubi/build.c

+4 −2
Original line number Diff line number Diff line
@@ -95,8 +95,8 @@ DEFINE_MUTEX(ubi_devices_mutex); 
static DEFINE_SPINLOCK(ubi_devices_lock);



/* "Show" method for files in '/<sysfs>/class/ubi/' */

static ssize_t ubi_version_show(struct class *class, struct class_attribute *attr,

				char *buf)

static ssize_t ubi_version_show(struct class *class,

				struct class_attribute *attr, char *buf)

{

	return sprintf(buf, "%d\n", UBI_VERSION);

}
@@ -591,6 +591,7 @@ static int attach_by_scanning(struct ubi_device *ubi) 


	ubi->bad_peb_count = si->bad_peb_count;

	ubi->good_peb_count = ubi->peb_count - ubi->bad_peb_count;

	ubi->corr_peb_count = si->corr_peb_count;

	ubi->max_ec = si->max_ec;

	ubi->mean_ec = si->mean_ec;

	ubi_msg("max. sequence number:       %llu", si->max_sqnum);
@@ -972,6 +973,7 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset) 
	ubi_msg("MTD device size:            %llu MiB", ubi->flash_size >> 20);

	ubi_msg("number of good PEBs:        %d", ubi->good_peb_count);

	ubi_msg("number of bad PEBs:         %d", ubi->bad_peb_count);

	ubi_msg("number of corrupted PEBs:   %d", ubi->corr_peb_count);

	ubi_msg("max. allowed volumes:       %d", ubi->vtbl_slots);

	ubi_msg("wear-leveling threshold:    %d", CONFIG_MTD_UBI_WL_THRESHOLD);

	ubi_msg("number of internal volumes: %d", UBI_INT_VOL_COUNT);

drivers/mtd/ubi/debug.h

+4 −0
Original line number Diff line number Diff line
@@ -57,6 +57,9 @@ void ubi_dbg_dump_seb(const struct ubi_scan_leb *seb, int type); 
void ubi_dbg_dump_mkvol_req(const struct ubi_mkvol_req *req);

void ubi_dbg_dump_flash(struct ubi_device *ubi, int pnum, int offset, int len);



#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)



#ifdef CONFIG_MTD_UBI_DEBUG_MSG

/* General debugging messages */

#define dbg_gen(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
@@ -172,6 +175,7 @@ static inline int ubi_dbg_is_erase_failure(void) 
#define ubi_dbg_dump_seb(seb, type)      ({})

#define ubi_dbg_dump_mkvol_req(req)      ({})

#define ubi_dbg_dump_flash(ubi, pnum, offset, len) ({})

#define ubi_dbg_print_hex_dump(l, ps, pt, r, g, b, len, a)  ({})



#define UBI_IO_DEBUG               0

#define DBG_DISABLE_BGT            0

drivers/mtd/ubi/eba.c

+8 −2
Original line number Diff line number Diff line
@@ -418,7 +418,7 @@ retry: 
				 * may try to recover data. FIXME: but this is

				 * not implemented.

				 */

				if (err == UBI_IO_BAD_HDR_READ ||

				if (err == UBI_IO_BAD_HDR_EBADMSG ||

				    err == UBI_IO_BAD_HDR) {

					ubi_warn("corrupted VID header at PEB "

						 "%d, LEB %d:%d", pnum, vol_id,
@@ -963,7 +963,7 @@ write_error: 
static int is_error_sane(int err)

{

	if (err == -EIO || err == -ENOMEM || err == UBI_IO_BAD_HDR ||

	    err == UBI_IO_BAD_HDR_READ || err == -ETIMEDOUT)

	    err == UBI_IO_BAD_HDR_EBADMSG || err == -ETIMEDOUT)

		return 0;

	return 1;

}
@@ -1201,6 +1201,9 @@ static void print_rsvd_warning(struct ubi_device *ubi, 


	ubi_warn("cannot reserve enough PEBs for bad PEB handling, reserved %d,"

		 " need %d", ubi->beb_rsvd_pebs, ubi->beb_rsvd_level);

	if (ubi->corr_peb_count)

		ubi_warn("%d PEBs are corrupted and not used",

			ubi->corr_peb_count);

}



/**
@@ -1263,6 +1266,9 @@ int ubi_eba_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si) 
	if (ubi->avail_pebs < EBA_RESERVED_PEBS) {

		ubi_err("no enough physical eraseblocks (%d, need %d)",

			ubi->avail_pebs, EBA_RESERVED_PEBS);

		if (ubi->corr_peb_count)

			ubi_err("%d PEBs are corrupted and not used",

				ubi->corr_peb_count);

		err = -ENOSPC;

		goto out_free;

	}