[PATCH 11/11] Target/configfs: Expose iSCSI network portal group T10-PI support

[Sagi Grimberg]

User may enable T10-PI support per network portal group. any connection
established on top of it, will be required to serve protected transactions.

Signed-off-by: Sagi Grimberg <sa...@mellanox.com>
---
 drivers/target/iscsi/iscsi_target_configfs.c |    6 ++++++
 drivers/target/iscsi/iscsi_target_tpg.c      |   19 +++++++++++++++++++
 drivers/target/iscsi/iscsi_target_tpg.h      |    1 +
 3 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/drivers/target/iscsi/iscsi_target_configfs.c 
b/drivers/target/iscsi/iscsi_target_configfs.c
index e3318ed..8f3f585 100644
--- a/drivers/target/iscsi/iscsi_target_configfs.c
+++ b/drivers/target/iscsi/iscsi_target_configfs.c
@@ -1051,6 +1051,11 @@ TPG_ATTR(demo_mode_discovery, S_IRUGO | S_IWUSR);
  */
 DEF_TPG_ATTRIB(default_erl);
 TPG_ATTR(default_erl, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_tpg_attrib_s_t10_pi
+ */
+DEF_TPG_ATTRIB(t10_pi);
+TPG_ATTR(t10_pi, S_IRUGO | S_IWUSR);
 
 static struct configfs_attribute *lio_target_tpg_attrib_attrs[] = {
        &iscsi_tpg_attrib_authentication.attr,
@@ -1063,6 +1068,7 @@ static struct configfs_attribute 
*lio_target_tpg_attrib_attrs[] = {
        &iscsi_tpg_attrib_prod_mode_write_protect.attr,
        &iscsi_tpg_attrib_demo_mode_discovery.attr,
        &iscsi_tpg_attrib_default_erl.attr,
+       &iscsi_tpg_attrib_t10_pi.attr,
        NULL,
 };
 
diff --git a/drivers/target/iscsi/iscsi_target_tpg.c 
b/drivers/target/iscsi/iscsi_target_tpg.c
index 80ae14c..d95a5f2 100644
--- a/drivers/target/iscsi/iscsi_target_tpg.c
+++ b/drivers/target/iscsi/iscsi_target_tpg.c
@@ -860,3 +860,22 @@ int iscsit_ta_default_erl(
 
        return 0;
 }
+
+int iscsit_ta_t10_pi(
+       struct iscsi_portal_group *tpg,
+       u32 flag)
+{
+       struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
+
+       if ((flag != 0) && (flag != 1)) {
+               pr_err("Illegal value %d\n", flag);
+               return -EINVAL;
+       }
+
+       a->t10_pi = flag;
+       pr_debug("iSCSI_TPG[%hu] - T10 Protection information bit:"
+               " %s\n", tpg->tpgt, (a->t10_pi) ?
+               "ON" : "OFF");
+
+       return 0;
+}
diff --git a/drivers/target/iscsi/iscsi_target_tpg.h 
b/drivers/target/iscsi/iscsi_target_tpg.h
index 213c0fc..0a182f2 100644
--- a/drivers/target/iscsi/iscsi_target_tpg.h
+++ b/drivers/target/iscsi/iscsi_target_tpg.h
@@ -39,5 +39,6 @@ extern int iscsit_ta_demo_mode_write_protect(struct 
iscsi_portal_group *, u32);
 extern int iscsit_ta_prod_mode_write_protect(struct iscsi_portal_group *, u32);
 extern int iscsit_ta_demo_mode_discovery(struct iscsi_portal_group *, u32);
 extern int iscsit_ta_default_erl(struct iscsi_portal_group *, u32);
+extern int iscsit_ta_t10_pi(struct iscsi_portal_group *, u32);
 
 #endif /* ISCSI_TARGET_TPG_H */
-- 
1.7.1

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