mirror of https://gitee.com/openkylin/linux.git
Merge git://git.infradead.org/~dedekind/ubi-2.6
This commit is contained in:
David Woodhouse
commit
e43fe686e4
|
|
@ -0,0 +1,212 @@
|
|||
What: /sys/class/ubi/
|
||||
Date: July 2006
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KernelVersion: 2.6.22
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Contact: Artem Bityutskiy <dedekind@infradead.org>
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Description:
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The ubi/ class sub-directory belongs to the UBI subsystem and
|
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provides general UBI information, per-UBI device information
|
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and per-UBI volume information.
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|
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What: /sys/class/ubi/version
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Date: July 2006
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KernelVersion: 2.6.22
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Contact: Artem Bityutskiy <dedekind@infradead.org>
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Description:
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This file contains version of the latest supported UBI on-media
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format. Currently it is 1, and there is no plan to change this.
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However, if in the future UBI needs on-flash format changes
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which cannot be done in a compatible manner, a new format
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version will be added. So this is a mechanism for possible
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future backward-compatible (but forward-incompatible)
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improvements.
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What: /sys/class/ubiX/
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Date: July 2006
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KernelVersion: 2.6.22
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Contact: Artem Bityutskiy <dedekind@infradead.org>
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Description:
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The /sys/class/ubi0, /sys/class/ubi1, etc directories describe
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UBI devices (UBI device 0, 1, etc). They contain general UBI
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device information and per UBI volume information (each UBI
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device may have many UBI volumes)
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What: /sys/class/ubi/ubiX/avail_eraseblocks
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Date: July 2006
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KernelVersion: 2.6.22
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Contact: Artem Bityutskiy <dedekind@infradead.org>
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Description:
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Amount of available logical eraseblock. For example, one may
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create a new UBI volume which has this amount of logical
|
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eraseblocks.
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What: /sys/class/ubi/ubiX/bad_peb_count
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Date: July 2006
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KernelVersion: 2.6.22
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Contact: Artem Bityutskiy <dedekind@infradead.org>
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Description:
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Count of bad physical eraseblocks on the underlying MTD device.
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What: /sys/class/ubi/ubiX/bgt_enabled
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Date: July 2006
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KernelVersion: 2.6.22
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Contact: Artem Bityutskiy <dedekind@infradead.org>
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Description:
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Contains ASCII "0\n" if the UBI background thread is disabled,
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and ASCII "1\n" if it is enabled.
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What: /sys/class/ubi/ubiX/dev
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Date: July 2006
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KernelVersion: 2.6.22
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Contact: Artem Bityutskiy <dedekind@infradead.org>
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Description:
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Major and minor numbers of the character device corresponding
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to this UBI device (in <major>:<minor> format).
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What: /sys/class/ubi/ubiX/eraseblock_size
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Date: July 2006
|
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KernelVersion: 2.6.22
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Contact: Artem Bityutskiy <dedekind@infradead.org>
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Description:
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Maximum logical eraseblock size this UBI device may provide. UBI
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volumes may have smaller logical eraseblock size because of their
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alignment.
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What: /sys/class/ubi/ubiX/max_ec
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Date: July 2006
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KernelVersion: 2.6.22
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Contact: Artem Bityutskiy <dedekind@infradead.org>
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Description:
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Maximum physical eraseblock erase counter value.
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|
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What: /sys/class/ubi/ubiX/max_vol_count
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Date: July 2006
|
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KernelVersion: 2.6.22
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Contact: Artem Bityutskiy <dedekind@infradead.org>
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Description:
|
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Maximum number of volumes which this UBI device may have.
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|
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What: /sys/class/ubi/ubiX/min_io_size
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Date: July 2006
|
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KernelVersion: 2.6.22
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Contact: Artem Bityutskiy <dedekind@infradead.org>
|
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Description:
|
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Minimum input/output unit size. All the I/O may only be done
|
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in fractions of the contained number.
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|
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What: /sys/class/ubi/ubiX/mtd_num
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Date: January 2008
|
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KernelVersion: 2.6.25
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Contact: Artem Bityutskiy <dedekind@infradead.org>
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Description:
|
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Number of the underlying MTD device.
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|
||||
What: /sys/class/ubi/ubiX/reserved_for_bad
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Date: July 2006
|
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KernelVersion: 2.6.22
|
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Contact: Artem Bityutskiy <dedekind@infradead.org>
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Description:
|
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Number of physical eraseblocks reserved for bad block handling.
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|
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What: /sys/class/ubi/ubiX/total_eraseblocks
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Date: July 2006
|
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KernelVersion: 2.6.22
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Contact: Artem Bityutskiy <dedekind@infradead.org>
|
||||
Description:
|
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Total number of good (not marked as bad) physical eraseblocks on
|
||||
the underlying MTD device.
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|
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What: /sys/class/ubi/ubiX/volumes_count
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Date: July 2006
|
||||
KernelVersion: 2.6.22
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Contact: Artem Bityutskiy <dedekind@infradead.org>
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||||
Description:
|
||||
Count of volumes on this UBI device.
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|
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What: /sys/class/ubi/ubiX/ubiX_Y/
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Date: July 2006
|
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KernelVersion: 2.6.22
|
||||
Contact: Artem Bityutskiy <dedekind@infradead.org>
|
||||
Description:
|
||||
The /sys/class/ubi/ubiX/ubiX_0/, /sys/class/ubi/ubiX/ubiX_1/,
|
||||
etc directories describe UBI volumes on UBI device X (volumes
|
||||
0, 1, etc).
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||||
|
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What: /sys/class/ubi/ubiX/ubiX_Y/alignment
|
||||
Date: July 2006
|
||||
KernelVersion: 2.6.22
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Contact: Artem Bityutskiy <dedekind@infradead.org>
|
||||
Description:
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Volume alignment - the value the logical eraseblock size of
|
||||
this volume has to be aligned on. For example, 2048 means that
|
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logical eraseblock size is multiple of 2048. In other words,
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volume logical eraseblock size is UBI device logical eraseblock
|
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size aligned to the alignment value.
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What: /sys/class/ubi/ubiX/ubiX_Y/corrupted
|
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Date: July 2006
|
||||
KernelVersion: 2.6.22
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||||
Contact: Artem Bityutskiy <dedekind@infradead.org>
|
||||
Description:
|
||||
Contains ASCII "0\n" if the UBI volume is OK, and ASCII "1\n"
|
||||
if it is corrupted (e.g., due to an interrupted volume update).
|
||||
|
||||
What: /sys/class/ubi/ubiX/ubiX_Y/data_bytes
|
||||
Date: July 2006
|
||||
KernelVersion: 2.6.22
|
||||
Contact: Artem Bityutskiy <dedekind@infradead.org>
|
||||
Description:
|
||||
The amount of data this volume contains. This value makes sense
|
||||
only for static volumes, and for dynamic volume it equivalent
|
||||
to the total volume size in bytes.
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||||
|
||||
What: /sys/class/ubi/ubiX/ubiX_Y/dev
|
||||
Date: July 2006
|
||||
KernelVersion: 2.6.22
|
||||
Contact: Artem Bityutskiy <dedekind@infradead.org>
|
||||
Description:
|
||||
Major and minor numbers of the character device corresponding
|
||||
to this UBI volume (in <major>:<minor> format).
|
||||
|
||||
What: /sys/class/ubi/ubiX/ubiX_Y/name
|
||||
Date: July 2006
|
||||
KernelVersion: 2.6.22
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||||
Contact: Artem Bityutskiy <dedekind@infradead.org>
|
||||
Description:
|
||||
Volume name.
|
||||
|
||||
What: /sys/class/ubi/ubiX/ubiX_Y/reserved_ebs
|
||||
Date: July 2006
|
||||
KernelVersion: 2.6.22
|
||||
Contact: Artem Bityutskiy <dedekind@infradead.org>
|
||||
Description:
|
||||
Count of physical eraseblock reserved for this volume.
|
||||
Equivalent to the volume size in logical eraseblocks.
|
||||
|
||||
What: /sys/class/ubi/ubiX/ubiX_Y/type
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||||
Date: July 2006
|
||||
KernelVersion: 2.6.22
|
||||
Contact: Artem Bityutskiy <dedekind@infradead.org>
|
||||
Description:
|
||||
Volume type. Contains ASCII "dynamic\n" for dynamic volumes and
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"static\n" for static volumes.
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|
||||
What: /sys/class/ubi/ubiX/ubiX_Y/upd_marker
|
||||
Date: July 2006
|
||||
KernelVersion: 2.6.22
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Contact: Artem Bityutskiy <dedekind@infradead.org>
|
||||
Description:
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Contains ASCII "0\n" if the update marker is not set for this
|
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volume, and "1\n" if it is set. The update marker is set when
|
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volume update starts, and cleaned when it ends. So the presence
|
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of the update marker indicates that the volume is being updated
|
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at the moment of the update was interrupted. The later may be
|
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checked using the "corrupted" sysfs file.
|
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|
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What: /sys/class/ubi/ubiX/ubiX_Y/usable_eb_size
|
||||
Date: July 2006
|
||||
KernelVersion: 2.6.22
|
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Contact: Artem Bityutskiy <dedekind@infradead.org>
|
||||
Description:
|
||||
Logical eraseblock size of this volume. Equivalent to logical
|
||||
eraseblock size of the device aligned on the volume alignment
|
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value.
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@ -24,8 +24,13 @@ config MTD_UBI_WL_THRESHOLD
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erase counter value and the lowest erase counter value of eraseblocks
|
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of UBI devices. When this threshold is exceeded, UBI starts performing
|
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wear leveling by means of moving data from eraseblock with low erase
|
||||
counter to eraseblocks with high erase counter. Leave the default
|
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value if unsure.
|
||||
counter to eraseblocks with high erase counter.
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|
||||
The default value should be OK for SLC NAND flashes, NOR flashes and
|
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other flashes which have eraseblock life-cycle 100000 or more.
|
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However, in case of MLC NAND flashes which typically have eraseblock
|
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life-cycle less then 10000, the threshold should be lessened (e.g.,
|
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to 128 or 256, although it does not have to be power of 2).
|
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|
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config MTD_UBI_BEB_RESERVE
|
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int "Percentage of reserved eraseblocks for bad eraseblocks handling"
|
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|
|
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|
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@ -606,8 +606,16 @@ static int io_init(struct ubi_device *ubi)
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ubi->ro_mode = 1;
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}
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dbg_msg("leb_size %d", ubi->leb_size);
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dbg_msg("ro_mode %d", ubi->ro_mode);
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ubi_msg("physical eraseblock size: %d bytes (%d KiB)",
|
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ubi->peb_size, ubi->peb_size >> 10);
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ubi_msg("logical eraseblock size: %d bytes", ubi->leb_size);
|
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ubi_msg("smallest flash I/O unit: %d", ubi->min_io_size);
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if (ubi->hdrs_min_io_size != ubi->min_io_size)
|
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ubi_msg("sub-page size: %d",
|
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ubi->hdrs_min_io_size);
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ubi_msg("VID header offset: %d (aligned %d)",
|
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ubi->vid_hdr_offset, ubi->vid_hdr_aloffset);
|
||||
ubi_msg("data offset: %d", ubi->leb_start);
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||||
|
||||
/*
|
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* Note, ideally, we have to initialize ubi->bad_peb_count here. But
|
||||
|
|
@ -804,15 +812,8 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset)
|
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ubi_msg("attached mtd%d to ubi%d", mtd->index, ubi_num);
|
||||
ubi_msg("MTD device name: \"%s\"", mtd->name);
|
||||
ubi_msg("MTD device size: %llu MiB", ubi->flash_size >> 20);
|
||||
ubi_msg("physical eraseblock size: %d bytes (%d KiB)",
|
||||
ubi->peb_size, ubi->peb_size >> 10);
|
||||
ubi_msg("logical eraseblock size: %d bytes", ubi->leb_size);
|
||||
ubi_msg("number of good PEBs: %d", ubi->good_peb_count);
|
||||
ubi_msg("number of bad PEBs: %d", ubi->bad_peb_count);
|
||||
ubi_msg("smallest flash I/O unit: %d", ubi->min_io_size);
|
||||
ubi_msg("VID header offset: %d (aligned %d)",
|
||||
ubi->vid_hdr_offset, ubi->vid_hdr_aloffset);
|
||||
ubi_msg("data offset: %d", ubi->leb_start);
|
||||
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);
|
||||
|
|
@ -950,8 +951,7 @@ static int __init ubi_init(void)
|
|||
BUILD_BUG_ON(sizeof(struct ubi_vid_hdr) != 64);
|
||||
|
||||
if (mtd_devs > UBI_MAX_DEVICES) {
|
||||
printk(KERN_ERR "UBI error: too many MTD devices, "
|
||||
"maximum is %d\n", UBI_MAX_DEVICES);
|
||||
ubi_err("too many MTD devices, maximum is %d", UBI_MAX_DEVICES);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
|
|
@ -959,25 +959,25 @@ static int __init ubi_init(void)
|
|||
ubi_class = class_create(THIS_MODULE, UBI_NAME_STR);
|
||||
if (IS_ERR(ubi_class)) {
|
||||
err = PTR_ERR(ubi_class);
|
||||
printk(KERN_ERR "UBI error: cannot create UBI class\n");
|
||||
ubi_err("cannot create UBI class");
|
||||
goto out;
|
||||
}
|
||||
|
||||
err = class_create_file(ubi_class, &ubi_version);
|
||||
if (err) {
|
||||
printk(KERN_ERR "UBI error: cannot create sysfs file\n");
|
||||
ubi_err("cannot create sysfs file");
|
||||
goto out_class;
|
||||
}
|
||||
|
||||
err = misc_register(&ubi_ctrl_cdev);
|
||||
if (err) {
|
||||
printk(KERN_ERR "UBI error: cannot register device\n");
|
||||
ubi_err("cannot register device");
|
||||
goto out_version;
|
||||
}
|
||||
|
||||
ubi_wl_entry_slab = kmem_cache_create("ubi_wl_entry_slab",
|
||||
sizeof(struct ubi_wl_entry),
|
||||
0, 0, NULL);
|
||||
sizeof(struct ubi_wl_entry),
|
||||
0, 0, NULL);
|
||||
if (!ubi_wl_entry_slab)
|
||||
goto out_dev_unreg;
|
||||
|
||||
|
|
@ -1000,8 +1000,7 @@ static int __init ubi_init(void)
|
|||
mutex_unlock(&ubi_devices_mutex);
|
||||
if (err < 0) {
|
||||
put_mtd_device(mtd);
|
||||
printk(KERN_ERR "UBI error: cannot attach mtd%d\n",
|
||||
mtd->index);
|
||||
ubi_err("cannot attach mtd%d", mtd->index);
|
||||
goto out_detach;
|
||||
}
|
||||
}
|
||||
|
|
@ -1023,7 +1022,7 @@ static int __init ubi_init(void)
|
|||
out_class:
|
||||
class_destroy(ubi_class);
|
||||
out:
|
||||
printk(KERN_ERR "UBI error: cannot initialize UBI, error %d\n", err);
|
||||
ubi_err("UBI error: cannot initialize UBI, error %d", err);
|
||||
return err;
|
||||
}
|
||||
module_init(ubi_init);
|
||||
|
|
|
|||
|
|
@ -99,8 +99,10 @@ void ubi_dbg_dump_mkvol_req(const struct ubi_mkvol_req *req);
|
|||
#ifdef CONFIG_MTD_UBI_DEBUG_MSG_BLD
|
||||
/* Initialization and build messages */
|
||||
#define dbg_bld(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
|
||||
#define UBI_IO_DEBUG 1
|
||||
#else
|
||||
#define dbg_bld(fmt, ...) ({})
|
||||
#define UBI_IO_DEBUG 0
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_MTD_UBI_DEBUG_EMULATE_BITFLIPS
|
||||
|
|
|
|||
|
|
@ -291,11 +291,12 @@ int ubi_create_gluebi(struct ubi_device *ubi, struct ubi_volume *vol)
|
|||
/*
|
||||
* In case of dynamic volume, MTD device size is just volume size. In
|
||||
* case of a static volume the size is equivalent to the amount of data
|
||||
* bytes, which is zero at this moment and will be changed after volume
|
||||
* update.
|
||||
* bytes.
|
||||
*/
|
||||
if (vol->vol_type == UBI_DYNAMIC_VOLUME)
|
||||
mtd->size = vol->usable_leb_size * vol->reserved_pebs;
|
||||
else
|
||||
mtd->size = vol->used_bytes;
|
||||
|
||||
if (add_mtd_device(mtd)) {
|
||||
ubi_err("cannot not add MTD device\n");
|
||||
|
|
|
|||
|
|
@ -631,6 +631,8 @@ int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum,
|
|||
|
||||
dbg_io("read EC header from PEB %d", pnum);
|
||||
ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
|
||||
if (UBI_IO_DEBUG)
|
||||
verbose = 1;
|
||||
|
||||
err = ubi_io_read(ubi, ec_hdr, pnum, 0, UBI_EC_HDR_SIZE);
|
||||
if (err) {
|
||||
|
|
@ -904,6 +906,8 @@ int ubi_io_read_vid_hdr(struct ubi_device *ubi, int pnum,
|
|||
|
||||
dbg_io("read VID header from PEB %d", pnum);
|
||||
ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
|
||||
if (UBI_IO_DEBUG)
|
||||
verbose = 1;
|
||||
|
||||
p = (char *)vid_hdr - ubi->vid_hdr_shift;
|
||||
err = ubi_io_read(ubi, p, pnum, ubi->vid_hdr_aloffset,
|
||||
|
|
|
|||
|
|
@ -42,6 +42,7 @@
|
|||
|
||||
#include <linux/err.h>
|
||||
#include <linux/crc32.h>
|
||||
#include <asm/div64.h>
|
||||
#include "ubi.h"
|
||||
|
||||
#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
|
||||
|
|
@ -91,27 +92,6 @@ static int add_to_list(struct ubi_scan_info *si, int pnum, int ec,
|
|||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* commit_to_mean_value - commit intermediate results to the final mean erase
|
||||
* counter value.
|
||||
* @si: scanning information
|
||||
*
|
||||
* This is a helper function which calculates partial mean erase counter mean
|
||||
* value and adds it to the resulting mean value. As we can work only in
|
||||
* integer arithmetic and we want to calculate the mean value of erase counter
|
||||
* accurately, we first sum erase counter values in @si->ec_sum variable and
|
||||
* count these components in @si->ec_count. If this temporary @si->ec_sum is
|
||||
* going to overflow, we calculate the partial mean value
|
||||
* (@si->ec_sum/@si->ec_count) and add it to @si->mean_ec.
|
||||
*/
|
||||
static void commit_to_mean_value(struct ubi_scan_info *si)
|
||||
{
|
||||
si->ec_sum /= si->ec_count;
|
||||
if (si->ec_sum % si->ec_count >= si->ec_count / 2)
|
||||
si->mean_ec += 1;
|
||||
si->mean_ec += si->ec_sum;
|
||||
}
|
||||
|
||||
/**
|
||||
* validate_vid_hdr - check that volume identifier header is correct and
|
||||
* consistent.
|
||||
|
|
@ -901,15 +881,8 @@ static int process_eb(struct ubi_device *ubi, struct ubi_scan_info *si, int pnum
|
|||
|
||||
adjust_mean_ec:
|
||||
if (!ec_corr) {
|
||||
if (si->ec_sum + ec < ec) {
|
||||
commit_to_mean_value(si);
|
||||
si->ec_sum = 0;
|
||||
si->ec_count = 0;
|
||||
} else {
|
||||
si->ec_sum += ec;
|
||||
si->ec_count += 1;
|
||||
}
|
||||
|
||||
si->ec_sum += ec;
|
||||
si->ec_count += 1;
|
||||
if (ec > si->max_ec)
|
||||
si->max_ec = ec;
|
||||
if (ec < si->min_ec)
|
||||
|
|
@ -965,9 +938,11 @@ struct ubi_scan_info *ubi_scan(struct ubi_device *ubi)
|
|||
|
||||
dbg_msg("scanning is finished");
|
||||
|
||||
/* Finish mean erase counter calculations */
|
||||
if (si->ec_count)
|
||||
commit_to_mean_value(si);
|
||||
/* Calculate mean erase counter */
|
||||
if (si->ec_count) {
|
||||
do_div(si->ec_sum, si->ec_count);
|
||||
si->mean_ec = si->ec_sum;
|
||||
}
|
||||
|
||||
if (si->is_empty)
|
||||
ubi_msg("empty MTD device detected");
|
||||
|
|
|
|||
|
|
@ -124,7 +124,7 @@ struct ubi_scan_info {
|
|||
int max_ec;
|
||||
unsigned long long max_sqnum;
|
||||
int mean_ec;
|
||||
int ec_sum;
|
||||
uint64_t ec_sum;
|
||||
int ec_count;
|
||||
};
|
||||
|
||||
|
|
|
|||
|
|
@ -24,11 +24,11 @@
|
|||
|
||||
/*
|
||||
* This file defines the layout of UBI headers and all the other UBI on-flash
|
||||
* data structures. May be included by user-space.
|
||||
* data structures.
|
||||
*/
|
||||
|
||||
#ifndef __UBI_HEADER_H__
|
||||
#define __UBI_HEADER_H__
|
||||
#ifndef __UBI_MEDIA_H__
|
||||
#define __UBI_MEDIA_H__
|
||||
|
||||
#include <asm/byteorder.h>
|
||||
|
||||
|
|
@ -369,4 +369,4 @@ struct ubi_vtbl_record {
|
|||
__be32 crc;
|
||||
} __attribute__ ((packed));
|
||||
|
||||
#endif /* !__UBI_HEADER_H__ */
|
||||
#endif /* !__UBI_MEDIA_H__ */
|
||||
|
|
@ -37,10 +37,9 @@
|
|||
#include <linux/string.h>
|
||||
#include <linux/vmalloc.h>
|
||||
#include <linux/mtd/mtd.h>
|
||||
|
||||
#include <mtd/ubi-header.h>
|
||||
#include <linux/mtd/ubi.h>
|
||||
|
||||
#include "ubi-media.h"
|
||||
#include "scan.h"
|
||||
#include "debug.h"
|
||||
|
||||
|
|
|
|||
|
|
@ -3,5 +3,4 @@ header-y += jffs2-user.h
|
|||
header-y += mtd-abi.h
|
||||
header-y += mtd-user.h
|
||||
header-y += nftl-user.h
|
||||
header-y += ubi-header.h
|
||||
header-y += ubi-user.h
|
||||
|
|
|
|||
Loading…
Reference in New Issue