When the VIRTIO_SCSI_F_T10_PI feature bit is enabled, the virtio_scsi driver
does not correctly calculate pi_bytes{out,in} when the underlying device has a
4 KiB logical block size. The current code assumes a 512 byte logical block
size and protection interval exponent of 0 (512 bytes + 8 bytes PI).
The first patch moves bio_integrity_intervals() and bio_integrity_bytes() into
blkdev.h so drivers can make use of them. The second patch modifies
virtio_scsi to call bio_integrity_bytes() to get the values for
pi_bytes{out,in}.
Greg Edwards (2):
block: move bio_integrity_{intervals,bytes} into blkdev.h
scsi: virtio_scsi: fix pi_bytes{out,in} on 4 KiB block size devices
block/bio-integrity.c | 22 ----------------------
drivers/scsi/virtio_scsi.c | 8 ++++----
include/linux/blkdev.h | 34 ++++++++++++++++++++++++++++++++++
3 files changed, 38 insertions(+), 26 deletions(-)
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2.17.1
