Currently ->verify_fn not woks at all because at the moment it is called bio->bi_iter.bi_size == 0, so we do not iterate integrity bvecs at all.
In order to perform verification we need to know original data vector, with new bvec rewind API this is trivial. testcase: https://github.com/dmonakhov/xfstests/commit/3c6509eaa83b9c17cd0bc95d73fcdd76e1c54a85 Signed-off-by: Dmitry Monakhov <dmonak...@openvz.org> --- block/bio-integrity.c | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-) diff --git a/block/bio-integrity.c b/block/bio-integrity.c index f2b9f09..f08096d 100644 --- a/block/bio-integrity.c +++ b/block/bio-integrity.c @@ -184,9 +184,10 @@ static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi, /** * bio_integrity_process - Process integrity metadata for a bio * @bio: bio to generate/verify integrity metadata for + * @proc_iter: iterator to process * @proc_fn: Pointer to the relevant processing function */ -static int bio_integrity_process(struct bio *bio, +static int bio_integrity_process(struct bio *bio, struct bvec_iter *proc_iter, integrity_processing_fn *proc_fn) { struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev); @@ -200,10 +201,10 @@ static int bio_integrity_process(struct bio *bio, iter.disk_name = bio->bi_bdev->bd_disk->disk_name; iter.interval = 1 << bi->interval_exp; - iter.seed = bip_get_seed(bip); + iter.seed = proc_iter->bi_sector; iter.prot_buf = prot_buf; - bio_for_each_segment(bv, bio, bviter) { + __bio_for_each_segment(bv, bio, bviter, *proc_iter) { void *kaddr = kmap_atomic(bv.bv_page); iter.data_buf = kaddr + bv.bv_offset; @@ -310,7 +311,8 @@ static int bio_integrity_setup(struct bio *bio) /* Auto-generate integrity metadata if this is a write */ if (bio_data_dir(bio) == WRITE) - bio_integrity_process(bio, bi->profile->generate_fn); + bio_integrity_process(bio, &bio->bi_iter, + bi->profile->generate_fn); return 0; } @@ -376,9 +378,15 @@ static void bio_integrity_verify_fn(struct work_struct *work) container_of(work, struct bio_integrity_payload, bip_work); struct bio *bio = bip->bip_bio; struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev); - - bio->bi_error = bio_integrity_process(bio, bi->profile->verify_fn); - + struct bvec_iter iter = bio->bi_iter; + + /* At the moment verify is called bio's iterator was advanced + * during split and completion, we need to rewind iterator to + * it's original position */ + bio_rewind_iter(bio, &iter, iter.bi_done); + if (!bio->bi_error) + bio->bi_error = bio_integrity_process(bio, &iter, + bi->profile->verify_fn); /* Restore original bio completion handler */ bio->bi_end_io = bip->bip_end_io; bio_endio(bio); -- 2.9.3
