Hello, I'm trying to read raw disks sectors using bio requests. I found a sample in a stackoverflow answer which seems to do exactly what I'm trying to : http://stackoverflow.com/a/17527300/51760 Reading this, a few questions came to me: 1/ The API is outdated, and bio struct no longer have bi_sector for instance. Those fields are now in bvec_iter (see http://lxr.free-electrons.com/source/include/linux/blk_types.h?v=3.19). bio struct do have bi_iter field, so I was wondering wether it's safe to populate the bi_iter directly ie: - bio->bi_sector = sector; + bio->bi_iter.bi_sector = sector; 2/ There is a generic bi_endio function in bio.c. What should readComplete implement? IMO it should just complete the "event" (of type struct completion), and then I can just call the bio_endio function provided by bio.c. Is that correct? Thanks in advance! --- François