Man page 9 : decode_rs8

decode_rs8 - Decode codeword (8bit data width)

int decode_rs8(struct rs_control *  rs , uint8_t *  data , uint16_t *  par , int  len , uint16_t *  s , int  no_eras , int *  eras_pos , uint16_t  invmsk , uint16_t *  corr );

rs
    the rs control structure

data
    data field of a given type

par
    received parity data field

len
    data length

s
    syndrome data field (if NULL, syndrome is calculated)

no_eras
    number of erasures

eras_pos
    position of erasures, can be NULL

invmsk
    invert data mask (will be xored on data, not on parity!)

corr
    buffer to store correction bitmask on eras_pos

The syndrome and parity uses a uint16_t data type to enable symbol size > 8. The calling code must take care of decoding of the syndrome result and the received parity before calling this code. Returns the number of corrected bits or -EBADMSG for uncorrectable errors.

Thomas Gleixner <>
    Author.