iscsid: print out more informative error string for kernel errors

Patch originally from Aastha Mehta.

This has iscsid print out a text string that should hopefully
be more clear than just the iscsi error value we have been
printing when we get a error from the kernel.

1 files changed, 83 insertions, 0 deletions

diff --git a/usr/kern_err_table.c b/usr/kern_err_table.c
new file mode 100644
index 0000000..a6ea8fb
--- /dev/null
+++ b/usr/kern_err_table.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2011 Aastha Mehta
+ * Copyright (C) 2011 Mike Christie
+ *
+ * maintained by open-iscsi@googlegroups.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * See the file COPYING included with this distribution for more details.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "iscsi_if.h"
+
+#include "kern_err_table.h"
+
+const char *kern_err_code_to_string(int err)
+{
+	switch (err){
+	case ISCSI_OK:
+		return "ISCSI_OK: operation successful";
+	case ISCSI_ERR_DATASN:
+		return "ISCSI_ERR_DATASN: Received invalid data sequence "
+			"number from target";
+	case ISCSI_ERR_DATA_OFFSET:
+		return "ISCSI_ERR_DATA_OFFSET: Seeking offset beyond the size "
+			"of the iSCSI segment";
+	case ISCSI_ERR_MAX_CMDSN:
+		return "ISCSI_ERR_MAX_CMDSN: Received invalid command sequence "
+			"number from target";
+	case ISCSI_ERR_EXP_CMDSN:
+		return "ISCSI_ERR_EXP_CMDSN: Received invalid expected command "			"sequence number from target";
+	case ISCSI_ERR_BAD_OPCODE:
+		return "ISCSI_ERR_BAD_OPCODE: Received an invalid iSCSI opcode";
+	case ISCSI_ERR_DATALEN:
+		return "ISCSI_ERR_DATALEN: Invalid data length value";
+	case ISCSI_ERR_AHSLEN:
+		return "ISCSI_ERR_AHSLEN: Received an invalid AHS length";
+	case ISCSI_ERR_PROTO:
+		return "ISCSI_ERR_PROTO: iSCSI protocol violation";
+	case ISCSI_ERR_LUN:
+		return "ISCSI_ERR_LUN: LUN mismatch";
+	case ISCSI_ERR_BAD_ITT:
+		return "ISCSI_ERR_BAD_ITT: Received invalid initiator task tag "			"from target";
+	case ISCSI_ERR_CONN_FAILED:
+		return "ISCSI_ERR_CONN_FAILED: iSCSI connection failed";
+	case ISCSI_ERR_R2TSN:
+		return "ISCSI_ERR_R2TSN: Received invalid R2T (Ready to "
+			"Transfer) data sequence number from target";
+	case ISCSI_ERR_SESSION_FAILED:
+		return "ISCSI_ERR_SESSION_FAILED: iSCSI session failed";
+	case ISCSI_ERR_HDR_DGST:
+		return "ISCSI_ERR_HDR_DGST: Header digest mismatch";
+	case ISCSI_ERR_DATA_DGST:
+		return "ISCSI_ERR_DATA_DGST: Data digest mismatch";
+	case ISCSI_ERR_PARAM_NOT_FOUND:
+		return "ISCSI_ERR_PARAM_NOT_FOUND: Parameter not found";
+	case ISCSI_ERR_NO_SCSI_CMD:
+		return "ISCSI_ERR_NO_SCSI_CMD: Could not look up SCSI command";
+	case ISCSI_ERR_INVALID_HOST:
+		return "ISCSI_ERR_INVALID_HOST: iSCSI host is in an invalid "
+			"state";
+	case ISCSI_ERR_XMIT_FAILED:
+		return "ISCSI_ERR_XMIT_FAILED: Transmission of iSCSI packet "
+			"failed";
+	case ISCSI_ERR_TCP_CONN_CLOSE:
+		return "ISCSI_ERR_TCP_CONN_CLOSE: TCP connection closed";
+	case ISCSI_ERR_SCSI_EH_SESSION_RST:
+		return "ISCSI_ERR_SCSI_EH_SESSION_RST: Session was dropped as "
+			"a result of SCSI error recovery";
+	default:
+		return "Invalid or unknown error code";
+	}
+}