target/sbc: Add P_TYPE + PROT_EN bits to READ_CAPACITY_16

This patch updates sbc_emulate_readcapacity_16() to set
P_TYPE and PROT_EN bits when DIF emulation is enabled by
the backend device.

Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index 26e8bfb27787..75364c7f6219 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -106,6 +106,11 @@ sbc_emulate_readcapacity_16(struct se_cmd *cmd)
         buf[9] = (dev->dev_attrib.block_size >> 16) & 0xff;
         buf[10] = (dev->dev_attrib.block_size >> 8) & 0xff;
         buf[11] = dev->dev_attrib.block_size & 0xff;
+        /*
+         * Set P_TYPE and PROT_EN bits for DIF support
+         */
+        if (dev->dev_attrib.pi_prot_type)
+                buf[12] = (dev->dev_attrib.pi_prot_type - 1) << 1 | 0x1;
 
         if (dev->transport->get_lbppbe)
                 buf[13] = dev->transport->get_lbppbe(dev) & 0x0f;