target/spc: Only expose PI inquiry bits when supported by fabric
Only expose standard INQUIRY PROTECT=1 and EVPD=0x86 TYPE1/TYPE3
PI control bits if the session + fabric support DIX PASS operations.
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Quinn Tran <quinn.tran@qlogic.com>
Cc: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index 3bebc71..d4c6a31 100644
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -71,6 +71,7 @@
{
struct se_lun *lun = cmd->se_lun;
struct se_device *dev = cmd->se_dev;
+ struct se_session *sess = cmd->se_sess;
/* Set RMB (removable media) for tape devices */
if (dev->transport->get_device_type(dev) == TYPE_TAPE)
@@ -101,10 +102,13 @@
if (dev->dev_attrib.emulate_3pc)
buf[5] |= 0x8;
/*
- * Set Protection (PROTECT) bit when DIF has been enabled.
+ * Set Protection (PROTECT) bit when DIF has been enabled on the
+ * device, and the transport supports VERIFY + PASS.
*/
- if (dev->dev_attrib.pi_prot_type)
- buf[5] |= 0x1;
+ if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) {
+ if (dev->dev_attrib.pi_prot_type)
+ buf[5] |= 0x1;
+ }
buf[7] = 0x2; /* CmdQue=1 */
@@ -473,16 +477,19 @@
spc_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
{
struct se_device *dev = cmd->se_dev;
+ struct se_session *sess = cmd->se_sess;
buf[3] = 0x3c;
/*
* Set GRD_CHK + REF_CHK for TYPE1 protection, or GRD_CHK
* only for TYPE3 protection.
*/
- if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT)
- buf[4] = 0x5;
- else if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE3_PROT)
- buf[4] = 0x4;
+ if (sess->sup_prot_ops & (TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS)) {
+ if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE1_PROT)
+ buf[4] = 0x5;
+ else if (dev->dev_attrib.pi_prot_type == TARGET_DIF_TYPE3_PROT)
+ buf[4] = 0x4;
+ }
/* Set HEADSUP, ORDSUP, SIMPSUP */
buf[5] = 0x07;