Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
ubi: Expose interface for detailed erase counters
Using the ioctl command 'UBI_IOCECNFO' user space can obtain
detailed erase counter information of all blocks of a device.
Signed-off-by: Rickard Andersson <rickard.andersson@axis.com>
Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
authored by
Rickard Andersson
and committed by
Richard Weinberger
3156ceb2
bdb0ca39
+33
+33
include/uapi/mtd/ubi-user.h
+33
include/uapi/mtd/ubi-user.h
···
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#define UBI_IOCRPEB _IOW(UBI_IOC_MAGIC, 4, __s32)
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/* Force scrubbing on the specified PEB */
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#define UBI_IOCSPEB _IOW(UBI_IOC_MAGIC, 5, __s32)
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/* Read detailed device erase counter information */
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#define UBI_IOCECNFO _IOWR(UBI_IOC_MAGIC, 6, struct ubi_ecinfo_req)
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/* ioctl commands of the UBI control character device */
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···
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char name[UBI_MAX_VOLUME_NAME + 1];
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} ents[UBI_MAX_RNVOL];
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} __packed;
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/**
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* struct ubi_ecinfo_req - a data structure used for requesting and receiving
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* erase block counter information from a UBI device.
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*
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* @start: index of first physical erase block to read (in)
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* @length: number of erase counters to read (in)
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* @read_length: number of erase counters that was actually read (out)
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* @padding: reserved for future, not used, has to be zeroed
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* @erase_counters: array of erase counter values (out)
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*
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* This structure is used to retrieve erase counter information for a specified
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* range of PEBs on a UBI device.
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* Erase counters are read from @start and attempts to read @length number of
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* erase counters.
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* The retrieved values are stored in the @erase_counters array. It is the
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* responsibility of the caller to allocate enough memory for storing @length
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* elements in the @erase_counters array.
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* If a block is bad or if the erase counter is unknown the corresponding value
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* in the array will be set to -1.
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* The @read_length field will indicate the number of erase counters actually
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* read. Typically @read_length will be limited due to memory or the number of
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* PEBs on the UBI device.
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*/
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struct ubi_ecinfo_req {
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__s32 start;
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__s32 length;
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__s32 read_length;
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__s8 padding[16];
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__s32 erase_counters[];
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} __packed;
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/**
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* struct ubi_leb_change_req - a data structure used in atomic LEB change