block: Deprecate the use of the term sector in the context of block integrity

The protection interval is not necessarily tied to the logical block
size of a block device. Stop using the terms "sector" and "sectors".

Going forward we will use the term "seed" to describe the initial
reference tag value for a given I/O. "Interval" will be used to describe
the portion of the data buffer that a given piece of protection
information is associated with.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

2 files changed, 26 insertions, 26 deletions

diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index e84f7fb..6a3aacf 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -185,20 +185,20 @@ bool bio_integrity_enabled(struct bio *bio)
 EXPORT_SYMBOL(bio_integrity_enabled);
 
 /**
- * bio_integrity_hw_sectors - Convert 512b sectors to hardware ditto
+ * bio_integrity_intervals - Return number of integrity intervals for a bio
  * @bi:		blk_integrity profile for device
- * @sectors:	Number of 512 sectors to convert
+ * @sectors:	Size of the bio in 512-byte sectors
  *
  * Description: The block layer calculates everything in 512 byte
- * sectors but integrity metadata is done in terms of the hardware
- * sector size of the storage device.  Convert the block layer sectors
- * to physical sectors.
+ * sectors but integrity metadata is done in terms of the data integrity
+ * interval size of the storage device.  Convert the block layer sectors
+ * to the appropriate number of integrity intervals.
  */
-static inline unsigned int bio_integrity_hw_sectors(struct blk_integrity *bi,
-						    unsigned int sectors)
+static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,
+						   unsigned int sectors)
 {
 	/* At this point there are only 512b or 4096b DIF/EPP devices */
-	if (bi->sector_size == 4096)
+	if (bi->interval == 4096)
 		return sectors >>= 3;
 
 	return sectors;
@@ -207,7 +207,7 @@ static inline unsigned int bio_integrity_hw_sectors(struct blk_integrity *bi,
 static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
 					       unsigned int sectors)
 {
-	return bio_integrity_hw_sectors(bi, sectors) * bi->tuple_size;
+	return bio_integrity_intervals(bi, sectors) * bi->tuple_size;
 }
 
 /**
@@ -221,25 +221,25 @@ static int bio_integrity_generate_verify(struct bio *bio, int operate)
 	struct blk_integrity_exchg bix;
 	struct bio_vec *bv;
 	struct bio_integrity_payload *bip = bio_integrity(bio);
-	sector_t sector;
-	unsigned int sectors, ret = 0, i;
+	sector_t seed;
+	unsigned int intervals, ret = 0, i;
 	void *prot_buf = page_address(bip->bip_vec->bv_page) +
 		bip->bip_vec->bv_offset;
 
 	if (operate)
-		sector = bio->bi_iter.bi_sector;
+		seed = bio->bi_iter.bi_sector;
 	else
-		sector = bip->bip_iter.bi_sector;
+		seed = bip->bip_iter.bi_sector;
 
 	bix.disk_name = bio->bi_bdev->bd_disk->disk_name;
-	bix.sector_size = bi->sector_size;
+	bix.interval = bi->interval;
 
 	bio_for_each_segment_all(bv, bio, i) {
 		void *kaddr = kmap_atomic(bv->bv_page);
 		bix.data_buf = kaddr + bv->bv_offset;
 		bix.data_size = bv->bv_len;
 		bix.prot_buf = prot_buf;
-		bix.sector = sector;
+		bix.seed = seed;
 
 		if (operate)
 			bi->generate_fn(&bix);
@@ -251,9 +251,9 @@ static int bio_integrity_generate_verify(struct bio *bio, int operate)
 			}
 		}
 
-		sectors = bv->bv_len / bi->sector_size;
-		sector += sectors;
-		prot_buf += sectors * bi->tuple_size;
+		intervals = bv->bv_len / bi->interval;
+		seed += intervals;
+		prot_buf += intervals * bi->tuple_size;
 
 		kunmap_atomic(kaddr);
 	}
@@ -294,17 +294,17 @@ int bio_integrity_prep(struct bio *bio)
 	unsigned long start, end;
 	unsigned int len, nr_pages;
 	unsigned int bytes, offset, i;
-	unsigned int sectors;
+	unsigned int intervals;
 
 	bi = bdev_get_integrity(bio->bi_bdev);
 	q = bdev_get_queue(bio->bi_bdev);
 	BUG_ON(bi == NULL);
 	BUG_ON(bio_integrity(bio));
 
-	sectors = bio_integrity_hw_sectors(bi, bio_sectors(bio));
+	intervals = bio_integrity_intervals(bi, bio_sectors(bio));
 
 	/* Allocate kernel buffer for protection data */
-	len = sectors * bi->tuple_size;
+	len = intervals * bi->tuple_size;
 	buf = kmalloc(len, GFP_NOIO | q->bounce_gfp);
 	if (unlikely(buf == NULL)) {
 		printk(KERN_ERR "could not allocate integrity buffer\n");
diff --git a/block/blk-integrity.c b/block/blk-integrity.c
index 7ac1716..3a83a7d 100644
--- a/block/blk-integrity.c
+++ b/block/blk-integrity.c
@@ -154,10 +154,10 @@ int blk_integrity_compare(struct gendisk *gd1, struct gendisk *gd2)
 	if (!b1 || !b2)
 		return -1;
 
-	if (b1->sector_size != b2->sector_size) {
-		printk(KERN_ERR "%s: %s/%s sector sz %u != %u\n", __func__,
-		       gd1->disk_name, gd2->disk_name,
-		       b1->sector_size, b2->sector_size);
+	if (b1->interval != b2->interval) {
+		pr_err("%s: %s/%s protection interval %u != %u\n",
+		       __func__, gd1->disk_name, gd2->disk_name,
+		       b1->interval, b2->interval);
 		return -1;
 	}
 
@@ -407,7 +407,7 @@ int blk_integrity_register(struct gendisk *disk, struct blk_integrity *template)
 		kobject_uevent(&bi->kobj, KOBJ_ADD);
 
 		bi->flags |= INTEGRITY_FLAG_READ | INTEGRITY_FLAG_WRITE;
-		bi->sector_size = queue_logical_block_size(disk->queue);
+		bi->interval = queue_logical_block_size(disk->queue);
 		disk->integrity = bi;
 	} else
 		bi = disk->integrity;