Make the choice of checksum a per-I/O property by introducing a flag
that can be inspected by the SCSI layer.
Signed-off-by: Martin K. Petersen <martin.peter...@oracle.com>
---
block/bio-integrity.c | 3 +++
drivers/scsi/sd_dif.c | 6 ++++--
include/linux/bio.h | 1 +
include/linux/blkdev.h | 1 +
4 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index 877bce028766..4eb7893a7559 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -303,6 +303,9 @@ int bio_integrity_prep(struct bio *bio)
bip->bip_iter.bi_size = len;
bip_set_seed(bip, bio->bi_iter.bi_sector);
+ if (bi->flags & BLK_INTEGRITY_IP_CHECKSUM)
+ bip_set_flag(bip, BIP_IP_CHECKSUM);
+
/* Map it */
offset = offset_in_page(buf);
for (i = 0 ; i < nr_pages ; i++) {
diff --git a/drivers/scsi/sd_dif.c b/drivers/scsi/sd_dif.c
index 95d5cb806f58..033d30d37952 100644
--- a/drivers/scsi/sd_dif.c
+++ b/drivers/scsi/sd_dif.c
@@ -255,12 +255,14 @@ void sd_dif_config_host(struct scsi_disk *sdkp)
return;
/* Enable DMA of protection information */
- if (scsi_host_get_guard(sdkp->device->host) & SHOST_DIX_GUARD_IP)
+ if (scsi_host_get_guard(sdkp->device->host) & SHOST_DIX_GUARD_IP) {
if (type == SD_DIF_TYPE3_PROTECTION)
blk_integrity_register(disk, &dif_type3_integrity_ip);
else
blk_integrity_register(disk, &dif_type1_integrity_ip);
- else
+
+ disk->integrity->flags |= BLK_INTEGRITY_IP_CHECKSUM;
+ } else
if (type == SD_DIF_TYPE3_PROTECTION)
blk_integrity_register(disk, &dif_type3_integrity_crc);
else
diff --git a/include/linux/bio.h b/include/linux/bio.h
index adc806325c36..83e4725f6aca 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -309,6 +309,7 @@ enum bip_flags {
BIP_MAPPED_INTEGRITY, /* integrity metadata has been remapped */
BIP_CTRL_NOCHECK, /* disable controller integrity checking */
BIP_DISK_NOCHECK, /* disable disk integrity checking */
+ BIP_IP_CHECKSUM, /* IP checksum */
};
static inline bool bip_get_flag(struct bio_integrity_payload *bip,
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 4be0446a8817..9bf6f761f1ac 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1432,6 +1432,7 @@ enum blk_integrity_flags {
BLK_INTEGRITY_VERIFY = 1 << 0,
BLK_INTEGRITY_GENERATE = 1 << 1,
BLK_INTEGRITY_DISK = 1 << 2,
+ BLK_INTEGRITY_IP_CHECKSUM = 1 << 3,
};
struct blk_integrity_iter {
--
1.9.0
--
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