target: Move dev_cit to struct se_subsystem_api

This patch adds initial support for dev_cit as external config_item_type.

This includes a new struct target_backend_cits to hold the external CITs
within struct se_subsystem_api, and target_core_setup_sub_cits() to be
used by backend drivers ahead of transport_subsystem_register().

It adds a TB_CIT_SETUP() helper following target_core_fabric_configfs.c
to perform the config_item_type assignments.

Also, drop left-over target_core_dev_cit from target_core_configfs.c code
and update comments.

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h
index 9adc1bca1178..7b84436541b4 100644
--- a/include/target/target_core_backend.h
+++ b/include/target/target_core_backend.h
@@ -5,6 +5,10 @@
 #define TRANSPORT_PLUGIN_VHBA_PDEV              2
 #define TRANSPORT_PLUGIN_VHBA_VDEV              3
 
+struct target_backend_cits {
+        struct config_item_type tb_dev_cit;
+};
+
 struct se_subsystem_api {
         struct list_head sub_api_list;
 
@@ -44,6 +48,8 @@ struct se_subsystem_api {
         int (*init_prot)(struct se_device *);
         int (*format_prot)(struct se_device *);
         void (*free_prot)(struct se_device *);
+
+        struct target_backend_cits tb_cits;
 };
 
 struct sbc_ops {
@@ -96,4 +102,7 @@ sense_reason_t	transport_generic_map_mem_to_cmd(struct se_cmd *,
 
 void    array_free(void *array, int n);
 
+/* From target_core_configfs.c to setup default backend config_item_types */
+void    target_core_setup_sub_cits(struct se_subsystem_api *);
+
 #endif /* TARGET_CORE_BACKEND_H */