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Diffstat (limited to 'block/t10-pi.c')
-rw-r--r--block/t10-pi.c72
1 files changed, 48 insertions, 24 deletions
diff --git a/block/t10-pi.c b/block/t10-pi.c
index 914d8cddd43a..d90892fd6f2a 100644
--- a/block/t10-pi.c
+++ b/block/t10-pi.c
@@ -12,14 +12,14 @@
#include <net/checksum.h>
#include <asm/unaligned.h>
-typedef __be16 (csum_fn) (void *, unsigned int);
+typedef __be16 (csum_fn) (__be16, void *, unsigned int);
-static __be16 t10_pi_crc_fn(void *data, unsigned int len)
+static __be16 t10_pi_crc_fn(__be16 crc, void *data, unsigned int len)
{
- return cpu_to_be16(crc_t10dif(data, len));
+ return cpu_to_be16(crc_t10dif_update(be16_to_cpu(crc), data, len));
}
-static __be16 t10_pi_ip_fn(void *data, unsigned int len)
+static __be16 t10_pi_ip_fn(__be16 csum, void *data, unsigned int len)
{
return (__force __be16)ip_compute_csum(data, len);
}
@@ -32,12 +32,16 @@ static __be16 t10_pi_ip_fn(void *data, unsigned int len)
static blk_status_t t10_pi_generate(struct blk_integrity_iter *iter,
csum_fn *fn, enum t10_dif_type type)
{
+ u8 offset = iter->pi_offset;
unsigned int i;
for (i = 0 ; i < iter->data_size ; i += iter->interval) {
- struct t10_pi_tuple *pi = iter->prot_buf;
+ struct t10_pi_tuple *pi = iter->prot_buf + offset;
- pi->guard_tag = fn(iter->data_buf, iter->interval);
+ pi->guard_tag = fn(0, iter->data_buf, iter->interval);
+ if (offset)
+ pi->guard_tag = fn(pi->guard_tag, iter->prot_buf,
+ offset);
pi->app_tag = 0;
if (type == T10_PI_TYPE1_PROTECTION)
@@ -56,12 +60,13 @@ static blk_status_t t10_pi_generate(struct blk_integrity_iter *iter,
static blk_status_t t10_pi_verify(struct blk_integrity_iter *iter,
csum_fn *fn, enum t10_dif_type type)
{
+ u8 offset = iter->pi_offset;
unsigned int i;
BUG_ON(type == T10_PI_TYPE0_PROTECTION);
for (i = 0 ; i < iter->data_size ; i += iter->interval) {
- struct t10_pi_tuple *pi = iter->prot_buf;
+ struct t10_pi_tuple *pi = iter->prot_buf + offset;
__be16 csum;
if (type == T10_PI_TYPE1_PROTECTION ||
@@ -83,7 +88,9 @@ static blk_status_t t10_pi_verify(struct blk_integrity_iter *iter,
goto next;
}
- csum = fn(iter->data_buf, iter->interval);
+ csum = fn(0, iter->data_buf, iter->interval);
+ if (offset)
+ csum = fn(csum, iter->prot_buf, offset);
if (pi->guard_tag != csum) {
pr_err("%s: guard tag error at sector %llu " \
@@ -134,8 +141,10 @@ static blk_status_t t10_pi_type1_verify_ip(struct blk_integrity_iter *iter)
*/
static void t10_pi_type1_prepare(struct request *rq)
{
- const int tuple_sz = rq->q->integrity.tuple_size;
+ struct blk_integrity *bi = &rq->q->integrity;
+ const int tuple_sz = bi->tuple_size;
u32 ref_tag = t10_pi_ref_tag(rq);
+ u8 offset = bi->pi_offset;
struct bio *bio;
__rq_for_each_bio(bio, rq) {
@@ -154,7 +163,7 @@ static void t10_pi_type1_prepare(struct request *rq)
p = bvec_kmap_local(&iv);
for (j = 0; j < iv.bv_len; j += tuple_sz) {
- struct t10_pi_tuple *pi = p;
+ struct t10_pi_tuple *pi = p + offset;
if (be32_to_cpu(pi->ref_tag) == virt)
pi->ref_tag = cpu_to_be32(ref_tag);
@@ -183,9 +192,11 @@ static void t10_pi_type1_prepare(struct request *rq)
*/
static void t10_pi_type1_complete(struct request *rq, unsigned int nr_bytes)
{
- unsigned intervals = nr_bytes >> rq->q->integrity.interval_exp;
- const int tuple_sz = rq->q->integrity.tuple_size;
+ struct blk_integrity *bi = &rq->q->integrity;
+ unsigned intervals = nr_bytes >> bi->interval_exp;
+ const int tuple_sz = bi->tuple_size;
u32 ref_tag = t10_pi_ref_tag(rq);
+ u8 offset = bi->pi_offset;
struct bio *bio;
__rq_for_each_bio(bio, rq) {
@@ -200,7 +211,7 @@ static void t10_pi_type1_complete(struct request *rq, unsigned int nr_bytes)
p = bvec_kmap_local(&iv);
for (j = 0; j < iv.bv_len && intervals; j += tuple_sz) {
- struct t10_pi_tuple *pi = p;
+ struct t10_pi_tuple *pi = p + offset;
if (be32_to_cpu(pi->ref_tag) == ref_tag)
pi->ref_tag = cpu_to_be32(virt);
@@ -280,20 +291,24 @@ const struct blk_integrity_profile t10_pi_type3_ip = {
};
EXPORT_SYMBOL(t10_pi_type3_ip);
-static __be64 ext_pi_crc64(void *data, unsigned int len)
+static __be64 ext_pi_crc64(u64 crc, void *data, unsigned int len)
{
- return cpu_to_be64(crc64_rocksoft(data, len));
+ return cpu_to_be64(crc64_rocksoft_update(crc, data, len));
}
static blk_status_t ext_pi_crc64_generate(struct blk_integrity_iter *iter,
enum t10_dif_type type)
{
+ u8 offset = iter->pi_offset;
unsigned int i;
for (i = 0 ; i < iter->data_size ; i += iter->interval) {
- struct crc64_pi_tuple *pi = iter->prot_buf;
+ struct crc64_pi_tuple *pi = iter->prot_buf + offset;
- pi->guard_tag = ext_pi_crc64(iter->data_buf, iter->interval);
+ pi->guard_tag = ext_pi_crc64(0, iter->data_buf, iter->interval);
+ if (offset)
+ pi->guard_tag = ext_pi_crc64(be64_to_cpu(pi->guard_tag),
+ iter->prot_buf, offset);
pi->app_tag = 0;
if (type == T10_PI_TYPE1_PROTECTION)
@@ -319,10 +334,11 @@ static bool ext_pi_ref_escape(u8 *ref_tag)
static blk_status_t ext_pi_crc64_verify(struct blk_integrity_iter *iter,
enum t10_dif_type type)
{
+ u8 offset = iter->pi_offset;
unsigned int i;
for (i = 0; i < iter->data_size; i += iter->interval) {
- struct crc64_pi_tuple *pi = iter->prot_buf;
+ struct crc64_pi_tuple *pi = iter->prot_buf + offset;
u64 ref, seed;
__be64 csum;
@@ -343,7 +359,11 @@ static blk_status_t ext_pi_crc64_verify(struct blk_integrity_iter *iter,
goto next;
}
- csum = ext_pi_crc64(iter->data_buf, iter->interval);
+ csum = ext_pi_crc64(0, iter->data_buf, iter->interval);
+ if (offset)
+ csum = ext_pi_crc64(be64_to_cpu(csum), iter->prot_buf,
+ offset);
+
if (pi->guard_tag != csum) {
pr_err("%s: guard tag error at sector %llu " \
"(rcvd %016llx, want %016llx)\n",
@@ -373,8 +393,10 @@ static blk_status_t ext_pi_type1_generate_crc64(struct blk_integrity_iter *iter)
static void ext_pi_type1_prepare(struct request *rq)
{
- const int tuple_sz = rq->q->integrity.tuple_size;
+ struct blk_integrity *bi = &rq->q->integrity;
+ const int tuple_sz = bi->tuple_size;
u64 ref_tag = ext_pi_ref_tag(rq);
+ u8 offset = bi->pi_offset;
struct bio *bio;
__rq_for_each_bio(bio, rq) {
@@ -393,7 +415,7 @@ static void ext_pi_type1_prepare(struct request *rq)
p = bvec_kmap_local(&iv);
for (j = 0; j < iv.bv_len; j += tuple_sz) {
- struct crc64_pi_tuple *pi = p;
+ struct crc64_pi_tuple *pi = p + offset;
u64 ref = get_unaligned_be48(pi->ref_tag);
if (ref == virt)
@@ -411,9 +433,11 @@ static void ext_pi_type1_prepare(struct request *rq)
static void ext_pi_type1_complete(struct request *rq, unsigned int nr_bytes)
{
- unsigned intervals = nr_bytes >> rq->q->integrity.interval_exp;
- const int tuple_sz = rq->q->integrity.tuple_size;
+ struct blk_integrity *bi = &rq->q->integrity;
+ unsigned intervals = nr_bytes >> bi->interval_exp;
+ const int tuple_sz = bi->tuple_size;
u64 ref_tag = ext_pi_ref_tag(rq);
+ u8 offset = bi->pi_offset;
struct bio *bio;
__rq_for_each_bio(bio, rq) {
@@ -428,7 +452,7 @@ static void ext_pi_type1_complete(struct request *rq, unsigned int nr_bytes)
p = bvec_kmap_local(&iv);
for (j = 0; j < iv.bv_len && intervals; j += tuple_sz) {
- struct crc64_pi_tuple *pi = p;
+ struct crc64_pi_tuple *pi = p + offset;
u64 ref = get_unaligned_be48(pi->ref_tag);
if (ref == ref_tag)
generated by cgit (git 2.34.1) at 2024-06-19 03:25:01 +0000