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@xxxxxxxxxx>
---
block/bio-integrity.c | 42 +++++++++++++++++++++---------------------
block/blk-integrity.c | 10 +++++-----
drivers/scsi/sd_dif.c | 46 +++++++++++++++++++++++-----------------------
include/linux/blkdev.h | 6 +++---
4 files changed, 52 insertions(+), 52 deletions(-)
diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index cea93a9553d6..8c03c78281e9 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -191,20 +191,20 @@ 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;
@@ -213,7 +213,7 @@ 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;
}
/**
@@ -227,25 +227,25 @@ 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);
@@ -257,9 +257,9 @@ 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);
}
@@ -300,17 +300,17 @@ 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 7ac17160ab69..3a83a7d08177 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;
diff --git a/drivers/scsi/sd_dif.c b/drivers/scsi/sd_dif.c
index 38a7778631be..1600270a46e5 100644
--- a/drivers/scsi/sd_dif.c
+++ b/drivers/scsi/sd_dif.c
@@ -57,16 +57,16 @@ static void sd_dif_type1_generate(struct blk_integrity_exchg *bix, csum_fn *fn)
{
void *buf = bix->data_buf;
struct sd_dif_tuple *sdt = bix->prot_buf;
- sector_t sector = bix->sector;
+ sector_t seed = bix->seed;
unsigned int i;
- for (i = 0 ; i < bix->data_size ; i += bix->sector_size, sdt++) {
- sdt->guard_tag = fn(buf, bix->sector_size);
- sdt->ref_tag = cpu_to_be32(sector & 0xffffffff);
+ for (i = 0 ; i < bix->data_size ; i += bix->interval, sdt++) {
+ sdt->guard_tag = fn(buf, bix->interval);
+ sdt->ref_tag = cpu_to_be32(seed & 0xffffffff);
sdt->app_tag = 0;
- buf += bix->sector_size;
- sector++;
+ buf += bix->interval;
+ seed++;
}
}
@@ -84,35 +84,35 @@ static int sd_dif_type1_verify(struct blk_integrity_exchg *bix, csum_fn *fn)
{
void *buf = bix->data_buf;
struct sd_dif_tuple *sdt = bix->prot_buf;
- sector_t sector = bix->sector;
+ sector_t seed = bix->seed;
unsigned int i;
__u16 csum;
- for (i = 0 ; i < bix->data_size ; i += bix->sector_size, sdt++) {
+ for (i = 0 ; i < bix->data_size ; i += bix->interval, sdt++) {
/* Unwritten sectors */
if (sdt->app_tag == 0xffff)
return 0;
- if (be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
+ if (be32_to_cpu(sdt->ref_tag) != (seed & 0xffffffff)) {
printk(KERN_ERR
"%s: ref tag error on sector %lu (rcvd %u)\n",
- bix->disk_name, (unsigned long)sector,
+ bix->disk_name, (unsigned long)seed,
be32_to_cpu(sdt->ref_tag));
return -EIO;
}
- csum = fn(buf, bix->sector_size);
+ csum = fn(buf, bix->interval);
if (sdt->guard_tag != csum) {
printk(KERN_ERR "%s: guard tag error on sector %lu " \
"(rcvd %04x, data %04x)\n", bix->disk_name,
- (unsigned long)sector,
+ (unsigned long)seed,
be16_to_cpu(sdt->guard_tag), be16_to_cpu(csum));
return -EIO;
}
- buf += bix->sector_size;
- sector++;
+ buf += bix->interval;
+ seed++;
}
return 0;
@@ -155,12 +155,12 @@ static void sd_dif_type3_generate(struct blk_integrity_exchg *bix, csum_fn *fn)
struct sd_dif_tuple *sdt = bix->prot_buf;
unsigned int i;
- for (i = 0 ; i < bix->data_size ; i += bix->sector_size, sdt++) {
- sdt->guard_tag = fn(buf, bix->sector_size);
+ for (i = 0 ; i < bix->data_size ; i += bix->interval, sdt++) {
+ sdt->guard_tag = fn(buf, bix->interval);
sdt->ref_tag = 0;
sdt->app_tag = 0;
- buf += bix->sector_size;
+ buf += bix->interval;
}
}
@@ -178,27 +178,27 @@ static int sd_dif_type3_verify(struct blk_integrity_exchg *bix, csum_fn *fn)
{
void *buf = bix->data_buf;
struct sd_dif_tuple *sdt = bix->prot_buf;
- sector_t sector = bix->sector;
+ sector_t seed = bix->seed;
unsigned int i;
__u16 csum;
- for (i = 0 ; i < bix->data_size ; i += bix->sector_size, sdt++) {
+ for (i = 0 ; i < bix->data_size ; i += bix->interval, sdt++) {
/* Unwritten sectors */
if (sdt->app_tag == 0xffff && sdt->ref_tag == 0xffffffff)
return 0;
- csum = fn(buf, bix->sector_size);
+ csum = fn(buf, bix->interval);
if (sdt->guard_tag != csum) {
printk(KERN_ERR "%s: guard tag error on sector %lu " \
"(rcvd %04x, data %04x)\n", bix->disk_name,
- (unsigned long)sector,
+ (unsigned long)seed,
be16_to_cpu(sdt->guard_tag), be16_to_cpu(csum));
return -EIO;
}
- buf += bix->sector_size;
- sector++;
+ buf += bix->interval;
+ seed++;
}
return 0;
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 84a0fa90cdad..d097f945cf57 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1468,9 +1468,9 @@ static inline uint64_t rq_io_start_time_ns(struct request *req)
struct blk_integrity_exchg {
void *prot_buf;
void *data_buf;
- sector_t sector;
+ sector_t seed;
unsigned int data_size;
- unsigned short sector_size;
+ unsigned short interval;
const char *disk_name;
};
@@ -1483,7 +1483,7 @@ struct blk_integrity {
unsigned short flags;
unsigned short tuple_size;
- unsigned short sector_size;
+ unsigned short interval;
unsigned short tag_size;
const char *name;
--
1.9.3
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
