PMEM2_BADBLOCK_CLEAR(3)

NAME

pmem2_badblock_clear() - clear the given bad block

SYNOPSIS

    #include <libpmem2.h>
    struct pmem2_badblock;
    struct pmem2_badblock_context;
    int pmem2_badblock_clear(
            struct pmem2_badblock_context *bbctx,
            struct pmem2_badblock *bb);

DESCRIPTION

The pmem2_badblock_clear() function clears the given *bb bad block.

It means that the pmem2_badblock_clear() function unmaps bad blocks and maps new, healthy, blocks in place of the bad ones. The new blocks are zeroed. The content of the bad blocks is lost.

It is not supported on Windows.

RETURN VALUE

The pmem2_badblock_clear() function clears the given *bb bad block and returns 0 on success or a negative error code on failure.

ERRORS

pmem2_badblock_clear() can fail with the following errors:

•   PMEM2_E_OFFSET_OUT_OF_RANGE - bad block's offset is greater than INT64_MAX

•   PMEM2_E_LENGTH_OUT_OF_RANGE - bad block's length is greater than INT64_MAX

•   PMEM2_E_NOSUPP - on Windows or when the OS does not support this functionality

•   -errno - set by failing fallocate(2), while deallocating bad blocks or allocating new blocks

•   -errno - set by failing ndctl functions: ndctl_bus_cmd_new_ars_cap, ndctl_cmd_submit, ndctl_cmd_ars_cap_get_range or ndctl_bus_cmd_new_clear_error while trying to clear a bad block in a DAX device

•   -ENXIO - ndctl_bus_cmd_new_clear_error did not manage to clear all bad blocks

SEE ALSO

pmem2_badblock_context_new(3), pmem2_badblock_next(3), libpmem2(7) and <https://pmem.io>