1 files changed, 23 insertions, 0 deletions

diff --git a/drivers/target/target_core_tpg.c b/drivers/target/target_core_tpg.c
index 0163309e2aba..5192ac0337f7 100644
--- a/drivers/target/target_core_tpg.c
+++ b/drivers/target/target_core_tpg.c
@@ -616,6 +616,29 @@ int core_tpg_set_initiator_node_queue_depth(
 }
 EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth);
 
+/*      core_tpg_set_initiator_node_tag():
+ *
+ *      Initiator nodeacl tags are not used internally, but may be used by
+ *      userspace to emulate aliases or groups.
+ *      Returns length of newly-set tag or -EINVAL.
+ */
+int core_tpg_set_initiator_node_tag(
+        struct se_portal_group *tpg,
+        struct se_node_acl *acl,
+        const char *new_tag)
+{
+        if (strlen(new_tag) >= MAX_ACL_TAG_SIZE)
+                return -EINVAL;
+
+        if (!strncmp("NULL", new_tag, 4)) {
+                acl->acl_tag[0] = '\0';
+                return 0;
+        }
+
+        return snprintf(acl->acl_tag, MAX_ACL_TAG_SIZE, "%s", new_tag);
+}
+EXPORT_SYMBOL(core_tpg_set_initiator_node_tag);
+
 static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg)
 {
         /* Set in core_dev_setup_virtual_lun0() */