target/iscsi: Introduce a helper function for TMF translation

This patch does not change any functionality.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Cc: Nicholas A. Bellinger <nab@linux-iscsi.org>
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>

drivers/target/iscsi/iscsi_target.c

@@ -1920,6 +1920,28 @@ static int iscsit_handle_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
 	return ret;
 }
 
+static enum tcm_tmreq_table iscsit_convert_tmf(u8 iscsi_tmf)
+{
+	switch (iscsi_tmf) {
+	case ISCSI_TM_FUNC_ABORT_TASK:
+		return TMR_ABORT_TASK;
+	case ISCSI_TM_FUNC_ABORT_TASK_SET:
+		return TMR_ABORT_TASK_SET;
+	case ISCSI_TM_FUNC_CLEAR_ACA:
+		return TMR_CLEAR_ACA;
+	case ISCSI_TM_FUNC_CLEAR_TASK_SET:
+		return TMR_CLEAR_TASK_SET;
+	case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET:
+		return TMR_LUN_RESET;
+	case ISCSI_TM_FUNC_TARGET_WARM_RESET:
+		return TMR_TARGET_WARM_RESET;
+	case ISCSI_TM_FUNC_TARGET_COLD_RESET:
+		return TMR_TARGET_COLD_RESET;
+	default:
+		return TMR_UNKNOWN;
+	}
+}
+
 int
 iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
 			   unsigned char *buf)
@@ -1985,30 +2007,8 @@ iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
 
 		target_get_sess_cmd(&cmd->se_cmd, true);
 		sess_ref = true;
-
-		switch (function) {
-		case ISCSI_TM_FUNC_ABORT_TASK:
-			tcm_function = TMR_ABORT_TASK;
-			break;
-		case ISCSI_TM_FUNC_ABORT_TASK_SET:
-			tcm_function = TMR_ABORT_TASK_SET;
-			break;
-		case ISCSI_TM_FUNC_CLEAR_ACA:
-			tcm_function = TMR_CLEAR_ACA;
-			break;
-		case ISCSI_TM_FUNC_CLEAR_TASK_SET:
-			tcm_function = TMR_CLEAR_TASK_SET;
-			break;
-		case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET:
-			tcm_function = TMR_LUN_RESET;
-			break;
-		case ISCSI_TM_FUNC_TARGET_WARM_RESET:
-			tcm_function = TMR_TARGET_WARM_RESET;
-			break;
-		case ISCSI_TM_FUNC_TARGET_COLD_RESET:
-			tcm_function = TMR_TARGET_COLD_RESET;
-			break;
-		default:
+		tcm_function = iscsit_convert_tmf(function);
+		if (tcm_function == TMR_UNKNOWN) {
 			pr_err("Unknown iSCSI TMR Function:"
 			       " 0x%02x\n", function);
 			return iscsit_add_reject_cmd(cmd,

include/target/target_core_base.h

@@ -197,6 +197,7 @@ enum tcm_tmreq_table {
 	TMR_LUN_RESET		= 5,
 	TMR_TARGET_WARM_RESET	= 6,
 	TMR_TARGET_COLD_RESET	= 7,
+	TMR_UNKNOWN		= 0xff,
 };
 
 /* fabric independent task management response values */