Having struct bio allows us to do more in the genrate/verify_fn,
like copying a known good guard tag already available rather than
calculating it.

Index: linux-4.18.0-80.11.2.el8_0/block/bio-integrity.c
===================================================================
--- linux-4.18.0-80.11.2.el8_0.orig/block/bio-integrity.c
+++ linux-4.18.0-80.11.2.el8_0/block/bio-integrity.c
@@ -197,6 +197,8 @@ static blk_status_t bio_integrity_proces
 
 		iter.data_buf = kaddr + bv.bv_offset;
 		iter.data_size = bv.bv_len;
+		iter.bi_idx = bviter.bi_idx;
+		iter.bio = bio;
 
 		ret = proc_fn(&iter);
 		if (ret) {
Index: linux-4.18.0-80.11.2.el8_0/include/linux/blkdev.h
===================================================================
--- linux-4.18.0-80.11.2.el8_0.orig/include/linux/blkdev.h
+++ linux-4.18.0-80.11.2.el8_0/include/linux/blkdev.h
@@ -1502,7 +1502,9 @@ struct blk_integrity_iter {
 	sector_t		seed;
 	unsigned int		data_size;
 	unsigned short		interval;
+	RH_KABI_FILL_HOLE(unsigned short bi_idx)
 	const char		*disk_name;
+	RH_KABI_EXTEND(struct bio *bio)
 };
 
 struct blk_integrity_profile {