iscsi-target: Add new TPG attribute

Add a new TPG attribute demo_mode_discovery which is enabled by default.

Signed-off-by: Thomas Glanzmann <thomas@glanzmann.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

4 files changed, 29 insertions, 0 deletions

diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c
index 59a0241a016d..1eec37c47662 100644
--- a/drivers/target/iscsi/iscsi_target_configfs.c
+++ b/drivers/target/iscsi/iscsi_target_configfs.c
@@ -1041,6 +1041,11 @@ TPG_ATTR(demo_mode_write_protect, S_IRUGO | S_IWUSR);
  */
 DEF_TPG_ATTRIB(prod_mode_write_protect);
 TPG_ATTR(prod_mode_write_protect, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_tpg_attrib_s_demo_mode_discovery,
+ */
+DEF_TPG_ATTRIB(demo_mode_discovery);
+TPG_ATTR(demo_mode_discovery, S_IRUGO | S_IWUSR);
 
 static struct configfs_attribute *lio_target_tpg_attrib_attrs[] = {
 	&iscsi_tpg_attrib_authentication.attr,
@@ -1051,6 +1056,7 @@ static struct configfs_attribute *lio_target_tpg_attrib_attrs[] = {
 	&iscsi_tpg_attrib_cache_dynamic_acls.attr,
 	&iscsi_tpg_attrib_demo_mode_write_protect.attr,
 	&iscsi_tpg_attrib_prod_mode_write_protect.attr,
+	&iscsi_tpg_attrib_demo_mode_discovery.attr,
 	NULL,
 };
 
diff --git a/drivers/target/iscsi/iscsi_target_core.h b/drivers/target/iscsi/iscsi_target_core.h
index cf8a1921a392..b03ee2ff31e5 100644
--- a/drivers/target/iscsi/iscsi_target_core.h
+++ b/drivers/target/iscsi/iscsi_target_core.h
@@ -58,6 +58,7 @@
 #define TA_DEMO_MODE_WRITE_PROTECT	1
 /* Disabled by default in production mode w/ explict ACLs */
 #define TA_PROD_MODE_WRITE_PROTECT	0
+#define TA_DEMO_MODE_DISCOVERY		1
 #define TA_CACHE_CORE_NPS		0
 
 
@@ -764,6 +765,7 @@ struct iscsi_tpg_attrib {
 	u32			default_cmdsn_depth;
 	u32			demo_mode_write_protect;
 	u32			prod_mode_write_protect;
+	u32			demo_mode_discovery;
 	struct iscsi_portal_group *tpg;
 };
 
diff --git a/drivers/target/iscsi/iscsi_target_tpg.c b/drivers/target/iscsi/iscsi_target_tpg.c
index 1ef5df03ff5c..98ccf0bff546 100644
--- a/drivers/target/iscsi/iscsi_target_tpg.c
+++ b/drivers/target/iscsi/iscsi_target_tpg.c
@@ -223,6 +223,7 @@ static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
 	a->cache_dynamic_acls = TA_CACHE_DYNAMIC_ACLS;
 	a->demo_mode_write_protect = TA_DEMO_MODE_WRITE_PROTECT;
 	a->prod_mode_write_protect = TA_PROD_MODE_WRITE_PROTECT;
+	a->demo_mode_discovery = TA_DEMO_MODE_DISCOVERY;
 }
 
 int iscsit_tpg_add_portal_group(struct iscsi_tiqn *tiqn, struct iscsi_portal_group *tpg)
@@ -820,3 +821,22 @@ int iscsit_ta_prod_mode_write_protect(
 
 	return 0;
 }
+
+int iscsit_ta_demo_mode_discovery(
+	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->demo_mode_discovery = flag;
+	pr_debug("iSCSI_TPG[%hu] - Demo Mode Discovery bit:"
+		" %s\n", tpg->tpgt, (a->demo_mode_discovery) ?
+		"ON" : "OFF");
+
+	return 0;
+}
diff --git a/drivers/target/iscsi/iscsi_target_tpg.h b/drivers/target/iscsi/iscsi_target_tpg.h
index b77693e2c209..3e8ce8644082 100644
--- a/drivers/target/iscsi/iscsi_target_tpg.h
+++ b/drivers/target/iscsi/iscsi_target_tpg.h
@@ -37,5 +37,6 @@ extern int iscsit_ta_default_cmdsn_depth(struct iscsi_portal_group *, u32);
 extern int iscsit_ta_cache_dynamic_acls(struct iscsi_portal_group *, u32);
 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);
 
 #endif /* ISCSI_TARGET_TPG_H */