blk_add_trace_rq_remap (9)

void blk_add_trace_rq_remap(void * ignore, struct request_queue * q, struct request * rq, dev_t dev, sector_t from);

ignore

trace callback data parameter (not used)

q

queue the io is for

rq

the source request

dev

target device

from

source sector

Device mapper remaps request to other devices. Add a trace for that action.