block: Clean up the code used to generate and verify integrity metadata
Instead of the "operate" parameter we pass in a seed value and a pointer
to a function that can be used to process the integrity metadata. The
generation function is changed to have a return value to fit into this
scheme.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/drivers/scsi/sd_dif.c b/drivers/scsi/sd_dif.c
index 1600270..801c418 100644
--- a/drivers/scsi/sd_dif.c
+++ b/drivers/scsi/sd_dif.c
@@ -53,42 +53,44 @@
* Type 1 and Type 2 protection use the same format: 16 bit guard tag,
* 16 bit app tag, 32 bit reference tag.
*/
-static void sd_dif_type1_generate(struct blk_integrity_exchg *bix, csum_fn *fn)
+static void sd_dif_type1_generate(struct blk_integrity_iter *iter, csum_fn *fn)
{
- void *buf = bix->data_buf;
- struct sd_dif_tuple *sdt = bix->prot_buf;
- sector_t seed = bix->seed;
+ void *buf = iter->data_buf;
+ struct sd_dif_tuple *sdt = iter->prot_buf;
+ sector_t seed = iter->seed;
unsigned int i;
- for (i = 0 ; i < bix->data_size ; i += bix->interval, sdt++) {
- sdt->guard_tag = fn(buf, bix->interval);
+ for (i = 0 ; i < iter->data_size ; i += iter->interval, sdt++) {
+ sdt->guard_tag = fn(buf, iter->interval);
sdt->ref_tag = cpu_to_be32(seed & 0xffffffff);
sdt->app_tag = 0;
- buf += bix->interval;
+ buf += iter->interval;
seed++;
}
}
-static void sd_dif_type1_generate_crc(struct blk_integrity_exchg *bix)
+static int sd_dif_type1_generate_crc(struct blk_integrity_iter *iter)
{
- sd_dif_type1_generate(bix, sd_dif_crc_fn);
+ sd_dif_type1_generate(iter, sd_dif_crc_fn);
+ return 0;
}
-static void sd_dif_type1_generate_ip(struct blk_integrity_exchg *bix)
+static int sd_dif_type1_generate_ip(struct blk_integrity_iter *iter)
{
- sd_dif_type1_generate(bix, sd_dif_ip_fn);
+ sd_dif_type1_generate(iter, sd_dif_ip_fn);
+ return 0;
}
-static int sd_dif_type1_verify(struct blk_integrity_exchg *bix, csum_fn *fn)
+static int sd_dif_type1_verify(struct blk_integrity_iter *iter, csum_fn *fn)
{
- void *buf = bix->data_buf;
- struct sd_dif_tuple *sdt = bix->prot_buf;
- sector_t seed = bix->seed;
+ void *buf = iter->data_buf;
+ struct sd_dif_tuple *sdt = iter->prot_buf;
+ sector_t seed = iter->seed;
unsigned int i;
__u16 csum;
- for (i = 0 ; i < bix->data_size ; i += bix->interval, sdt++) {
+ for (i = 0 ; i < iter->data_size ; i += iter->interval, sdt++) {
/* Unwritten sectors */
if (sdt->app_tag == 0xffff)
return 0;
@@ -96,36 +98,36 @@
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)seed,
+ iter->disk_name, (unsigned long)seed,
be32_to_cpu(sdt->ref_tag));
return -EIO;
}
- csum = fn(buf, bix->interval);
+ csum = fn(buf, iter->interval);
if (sdt->guard_tag != csum) {
printk(KERN_ERR "%s: guard tag error on sector %lu " \
- "(rcvd %04x, data %04x)\n", bix->disk_name,
+ "(rcvd %04x, data %04x)\n", iter->disk_name,
(unsigned long)seed,
be16_to_cpu(sdt->guard_tag), be16_to_cpu(csum));
return -EIO;
}
- buf += bix->interval;
+ buf += iter->interval;
seed++;
}
return 0;
}
-static int sd_dif_type1_verify_crc(struct blk_integrity_exchg *bix)
+static int sd_dif_type1_verify_crc(struct blk_integrity_iter *iter)
{
- return sd_dif_type1_verify(bix, sd_dif_crc_fn);
+ return sd_dif_type1_verify(iter, sd_dif_crc_fn);
}
-static int sd_dif_type1_verify_ip(struct blk_integrity_exchg *bix)
+static int sd_dif_type1_verify_ip(struct blk_integrity_iter *iter)
{
- return sd_dif_type1_verify(bix, sd_dif_ip_fn);
+ return sd_dif_type1_verify(iter, sd_dif_ip_fn);
}
static struct blk_integrity dif_type1_integrity_crc = {
@@ -149,69 +151,71 @@
* Type 3 protection has a 16-bit guard tag and 16 + 32 bits of opaque
* tag space.
*/
-static void sd_dif_type3_generate(struct blk_integrity_exchg *bix, csum_fn *fn)
+static void sd_dif_type3_generate(struct blk_integrity_iter *iter, csum_fn *fn)
{
- void *buf = bix->data_buf;
- struct sd_dif_tuple *sdt = bix->prot_buf;
+ void *buf = iter->data_buf;
+ struct sd_dif_tuple *sdt = iter->prot_buf;
unsigned int i;
- for (i = 0 ; i < bix->data_size ; i += bix->interval, sdt++) {
- sdt->guard_tag = fn(buf, bix->interval);
+ for (i = 0 ; i < iter->data_size ; i += iter->interval, sdt++) {
+ sdt->guard_tag = fn(buf, iter->interval);
sdt->ref_tag = 0;
sdt->app_tag = 0;
- buf += bix->interval;
+ buf += iter->interval;
}
}
-static void sd_dif_type3_generate_crc(struct blk_integrity_exchg *bix)
+static int sd_dif_type3_generate_crc(struct blk_integrity_iter *iter)
{
- sd_dif_type3_generate(bix, sd_dif_crc_fn);
+ sd_dif_type3_generate(iter, sd_dif_crc_fn);
+ return 0;
}
-static void sd_dif_type3_generate_ip(struct blk_integrity_exchg *bix)
+static int sd_dif_type3_generate_ip(struct blk_integrity_iter *iter)
{
- sd_dif_type3_generate(bix, sd_dif_ip_fn);
+ sd_dif_type3_generate(iter, sd_dif_ip_fn);
+ return 0;
}
-static int sd_dif_type3_verify(struct blk_integrity_exchg *bix, csum_fn *fn)
+static int sd_dif_type3_verify(struct blk_integrity_iter *iter, csum_fn *fn)
{
- void *buf = bix->data_buf;
- struct sd_dif_tuple *sdt = bix->prot_buf;
- sector_t seed = bix->seed;
+ void *buf = iter->data_buf;
+ struct sd_dif_tuple *sdt = iter->prot_buf;
+ sector_t seed = iter->seed;
unsigned int i;
__u16 csum;
- for (i = 0 ; i < bix->data_size ; i += bix->interval, sdt++) {
+ for (i = 0 ; i < iter->data_size ; i += iter->interval, sdt++) {
/* Unwritten sectors */
if (sdt->app_tag == 0xffff && sdt->ref_tag == 0xffffffff)
return 0;
- csum = fn(buf, bix->interval);
+ csum = fn(buf, iter->interval);
if (sdt->guard_tag != csum) {
printk(KERN_ERR "%s: guard tag error on sector %lu " \
- "(rcvd %04x, data %04x)\n", bix->disk_name,
+ "(rcvd %04x, data %04x)\n", iter->disk_name,
(unsigned long)seed,
be16_to_cpu(sdt->guard_tag), be16_to_cpu(csum));
return -EIO;
}
- buf += bix->interval;
+ buf += iter->interval;
seed++;
}
return 0;
}
-static int sd_dif_type3_verify_crc(struct blk_integrity_exchg *bix)
+static int sd_dif_type3_verify_crc(struct blk_integrity_iter *iter)
{
- return sd_dif_type3_verify(bix, sd_dif_crc_fn);
+ return sd_dif_type3_verify(iter, sd_dif_crc_fn);
}
-static int sd_dif_type3_verify_ip(struct blk_integrity_exchg *bix)
+static int sd_dif_type3_verify_ip(struct blk_integrity_iter *iter)
{
- return sd_dif_type3_verify(bix, sd_dif_ip_fn);
+ return sd_dif_type3_verify(iter, sd_dif_ip_fn);
}
static struct blk_integrity dif_type3_integrity_crc = {
@@ -310,6 +314,7 @@
phys = hw_sector & 0xffffffff;
__rq_for_each_bio(bio, rq) {
+ struct bio_integrity_payload *bip = bio_integrity(bio);
struct bio_vec iv;
struct bvec_iter iter;
unsigned int j;
@@ -318,9 +323,9 @@
if (bio_flagged(bio, BIO_MAPPED_INTEGRITY))
break;
- virt = bio_integrity(bio)->bip_iter.bi_sector & 0xffffffff;
+ virt = bip_get_seed(bip) & 0xffffffff;
- bip_for_each_vec(iv, bio_integrity(bio), iter) {
+ bip_for_each_vec(iv, bip, iter) {
sdt = kmap_atomic(iv.bv_page)
+ iv.bv_offset;
@@ -366,12 +371,13 @@
phys >>= 3;
__rq_for_each_bio(bio, scmd->request) {
+ struct bio_integrity_payload *bip = bio_integrity(bio);
struct bio_vec iv;
struct bvec_iter iter;
- virt = bio_integrity(bio)->bip_iter.bi_sector & 0xffffffff;
+ virt = bip_get_seed(bip) & 0xffffffff;
- bip_for_each_vec(iv, bio_integrity(bio), iter) {
+ bip_for_each_vec(iv, bip, iter) {
sdt = kmap_atomic(iv.bv_page)
+ iv.bv_offset;