NAME blk_rq_err_bytes - determine number of bytes till the next failure boundary

SYNOPSIS unsigned int blk_rq_err_bytes(const struct request * rq);

ARGUMENTS rq request to examine

DESCRIPTION A request could be merge of IOs which require different failure handling. This function determines the number of bytes which can be failed from the beginning of the request without crossing into area which need to be retried further.

RETURN The number of bytes to fail.

CONTEXT queue_lock must be held.

COPYRIGHT Kernel Hackers Manual 2.6. January 2013 BLK_RQ_ERR_BYTES(9)