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block: Add a disk flag to block integrity profile

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So far we have relied on the app tag size to determine whether a disk
has been formatted with T10 protection information or not. However, not
all target devices provide application tag storage.

Add a flag to the block integrity profile that indicates whether the
disk has been formatted with protection information.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Sagi Grimberg <sagig@dev.mellanox.co.il>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Martin K. Petersen
2014-09-26 19:20:03 -04:00
committed by Jens Axboe
parent 8288f496eb
commit 3aec2f41a8
4 changed files with 28 additions and 1 deletions
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8
drivers/scsi/sd_dif.c
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@@ -270,7 +270,13 @@ void sd_dif_config_host(struct scsi_disk *sdkp)
"Enabling DIX %s protection\n", disk->integrity->name);
/* Signal to block layer that we support sector tagging */
if (dif && type && sdkp->ATO) {
if (dif && type) {
disk->integrity->flags |= BLK_INTEGRITY_DEVICE_CAPABLE;
if (!sdkp)
return;
if (type == SD_DIF_TYPE3_PROTECTION)
disk->integrity->tag_size = sizeof(u16) + sizeof(u32);
else