iscsi/iser-target: Add fabric_prot_type attribute support

This patch updates iscsi/iser-target to add a new fabric_prot_type
TPG attribute for iser-target, used for controlling LLD level
protection into LIO when the backend device does not support T10-PI.

This is required for ib_isert to enable WRITE_STRIP + READ_INSERT
hardware offloads.

It's disabled by default and controls which se_sesion->sess_prot_type
are set at iscsi_target_locate_portal() session registration time.

Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Martin Petersen <martin.petersen@oracle.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/target/iscsi/iscsi_target_core.h b/include/target/iscsi/iscsi_target_core.h
index 0e394a031c28..54e7af301888 100644
--- a/include/target/iscsi/iscsi_target_core.h
+++ b/include/target/iscsi/iscsi_target_core.h
@@ -62,6 +62,7 @@
 #define TA_CACHE_CORE_NPS               0
 /* T10 protection information disabled by default */
 #define TA_DEFAULT_T10_PI               0
+#define TA_DEFAULT_FABRIC_PROT_TYPE     0
 
 #define ISCSI_IOV_DATA_BUFFER           5
 
@@ -772,6 +773,7 @@ struct iscsi_tpg_attrib {
         u32                     demo_mode_discovery;
         u32                     default_erl;
         u8                      t10_pi;
+        u32                     fabric_prot_type;
         struct iscsi_portal_group *tpg;
 };