scsi: target: core: Move core_alua_check_nonop_delay() call

Move core_alua_check_nonop_delay() to transport_handle_cdb_direct() so the
iSCSI target driver doesn't have to call as many core functions
directly. We will eventually merge transport_handle_cdb_direct and
target_submit so iSCSI and the other drivers call a common function.

It will also be helpful as preparation for future changes which allow the
iSCSI target to defer command submission to the LIO submission workqueue,
because we will have a common submission function for that which will be
based on transport_handle_cdb_direct()/target_submit().
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Link: https://lore.kernel.org/r/20230928020907.5730-3-michael.christie@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/target/iscsi/iscsi_target.c

@@ -1234,12 +1234,6 @@ int iscsit_setup_scsi_cmd(struct iscsit_conn *conn, struct iscsit_cmd *cmd,
 	spin_lock_bh(&conn->cmd_lock);
 	list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list);
 	spin_unlock_bh(&conn->cmd_lock);
-	/*
-	 * Check if we need to delay processing because of ALUA
-	 * Active/NonOptimized primary access state..
-	 */
-	core_alua_check_nonop_delay(&cmd->se_cmd);
-
 	return 0;
 }
 EXPORT_SYMBOL(iscsit_setup_scsi_cmd);

drivers/target/target_core_alua.c

@@ -850,7 +850,6 @@ int core_alua_check_nonop_delay(
 	msleep_interruptible(cmd->alua_nonop_delay);
 	return 0;
 }
-EXPORT_SYMBOL(core_alua_check_nonop_delay);
 
 static int core_alua_write_tpg_metadata(
 	const char *path,

drivers/target/target_core_transport.c

@@ -1586,6 +1586,12 @@ int transport_handle_cdb_direct(
 
 	might_sleep();
 
+	/*
+	 * Check if we need to delay processing because of ALUA
+	 * Active/NonOptimized primary access state..
+	 */
+	core_alua_check_nonop_delay(cmd);
+
 	if (!cmd->se_lun) {
 		dump_stack();
 		pr_err("cmd->se_lun is NULL\n");
@@ -1817,12 +1823,6 @@ void target_submit(struct se_cmd *se_cmd)
 
 	}
 
-	/*
-	 * Check if we need to delay processing because of ALUA
-	 * Active/NonOptimized primary access state..
-	 */
-	core_alua_check_nonop_delay(se_cmd);
-
 	transport_handle_cdb_direct(se_cmd);
 }
 EXPORT_SYMBOL_GPL(target_submit);

include/target/target_core_fabric.h

@@ -206,8 +206,6 @@ void	target_stop_session(struct se_session *se_sess);
 void	target_wait_for_sess_cmds(struct se_session *);
 void	target_show_cmd(const char *pfx, struct se_cmd *cmd);
 
-int	core_alua_check_nonop_delay(struct se_cmd *);
-
 int	core_tmr_alloc_req(struct se_cmd *, void *, u8, gfp_t);
 void	core_tmr_release_req(struct se_tmr_req *);
 int	transport_generic_handle_tmr(struct se_cmd *);