Dmitry Monakhov <dmonakhov@xxxxxxxxxx> writes: Dmitry, > Some ->bi_end_io handlers (for example: pi_verify or decrypt handlers) > need to know original data vector, but after bio traverse io-stack it > may be advanced, splited and relocated many times so it is hard to > guess original iterator. Let's add 'bi_done' conter which accounts > number of bytes iterator was advanced during it's evolution. Later > end_io handler may easily restore original iterator by rewinding > iterator to iter->bi_done. Originally, the original integrity bip was immutable. Any slicing and dicing was exclusively done on clones. And therefore the original bip was always suitable for use with verify. -- Martin K. Petersen Oracle Linux Engineering
