v4.19.13 snapshot.
diff --git a/net/sctp/debug.c b/net/sctp/debug.c
new file mode 100644
index 0000000..8f6c2e8
--- /dev/null
+++ b/net/sctp/debug.c
@@ -0,0 +1,184 @@
+/* SCTP kernel implementation
+ * (C) Copyright IBM Corp. 2001, 2004
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001 Intel Corp.
+ *
+ * This file is part of the SCTP kernel implementation
+ *
+ * This file converts numerical ID value to alphabetical names for SCTP
+ * terms such as chunk type, parameter time, event type, etc.
+ *
+ * This SCTP implementation 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, or (at your option)
+ * any later version.
+ *
+ * This SCTP implementation 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU CC; see the file COPYING. If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * Please send any bug reports or fixes you make to the
+ * email address(es):
+ * lksctp developers <linux-sctp@vger.kernel.org>
+ *
+ * Written or modified by:
+ * La Monte H.P. Yarroll <piggy@acm.org>
+ * Karl Knutson <karl@athena.chicago.il.us>
+ * Xingang Guo <xingang.guo@intel.com>
+ * Jon Grimm <jgrimm@us.ibm.com>
+ * Daisy Chang <daisyc@us.ibm.com>
+ * Sridhar Samudrala <sri@us.ibm.com>
+ */
+
+#include <net/sctp/sctp.h>
+
+/* These are printable forms of Chunk ID's from section 3.1. */
+static const char *const sctp_cid_tbl[SCTP_NUM_BASE_CHUNK_TYPES] = {
+ "DATA",
+ "INIT",
+ "INIT_ACK",
+ "SACK",
+ "HEARTBEAT",
+ "HEARTBEAT_ACK",
+ "ABORT",
+ "SHUTDOWN",
+ "SHUTDOWN_ACK",
+ "ERROR",
+ "COOKIE_ECHO",
+ "COOKIE_ACK",
+ "ECN_ECNE",
+ "ECN_CWR",
+ "SHUTDOWN_COMPLETE",
+};
+
+/* Lookup "chunk type" debug name. */
+const char *sctp_cname(const union sctp_subtype cid)
+{
+ if (cid.chunk <= SCTP_CID_BASE_MAX)
+ return sctp_cid_tbl[cid.chunk];
+
+ switch (cid.chunk) {
+ case SCTP_CID_ASCONF:
+ return "ASCONF";
+
+ case SCTP_CID_ASCONF_ACK:
+ return "ASCONF_ACK";
+
+ case SCTP_CID_FWD_TSN:
+ return "FWD_TSN";
+
+ case SCTP_CID_AUTH:
+ return "AUTH";
+
+ case SCTP_CID_RECONF:
+ return "RECONF";
+
+ case SCTP_CID_I_DATA:
+ return "I_DATA";
+
+ case SCTP_CID_I_FWD_TSN:
+ return "I_FWD_TSN";
+
+ default:
+ break;
+ }
+
+ return "unknown chunk";
+}
+
+/* These are printable forms of the states. */
+const char *const sctp_state_tbl[SCTP_STATE_NUM_STATES] = {
+ "STATE_CLOSED",
+ "STATE_COOKIE_WAIT",
+ "STATE_COOKIE_ECHOED",
+ "STATE_ESTABLISHED",
+ "STATE_SHUTDOWN_PENDING",
+ "STATE_SHUTDOWN_SENT",
+ "STATE_SHUTDOWN_RECEIVED",
+ "STATE_SHUTDOWN_ACK_SENT",
+};
+
+/* Events that could change the state of an association. */
+const char *const sctp_evttype_tbl[] = {
+ "EVENT_T_unknown",
+ "EVENT_T_CHUNK",
+ "EVENT_T_TIMEOUT",
+ "EVENT_T_OTHER",
+ "EVENT_T_PRIMITIVE"
+};
+
+/* Return value of a state function */
+const char *const sctp_status_tbl[] = {
+ "DISPOSITION_DISCARD",
+ "DISPOSITION_CONSUME",
+ "DISPOSITION_NOMEM",
+ "DISPOSITION_DELETE_TCB",
+ "DISPOSITION_ABORT",
+ "DISPOSITION_VIOLATION",
+ "DISPOSITION_NOT_IMPL",
+ "DISPOSITION_ERROR",
+ "DISPOSITION_BUG"
+};
+
+/* Printable forms of primitives */
+static const char *const sctp_primitive_tbl[SCTP_NUM_PRIMITIVE_TYPES] = {
+ "PRIMITIVE_ASSOCIATE",
+ "PRIMITIVE_SHUTDOWN",
+ "PRIMITIVE_ABORT",
+ "PRIMITIVE_SEND",
+ "PRIMITIVE_REQUESTHEARTBEAT",
+ "PRIMITIVE_ASCONF",
+};
+
+/* Lookup primitive debug name. */
+const char *sctp_pname(const union sctp_subtype id)
+{
+ if (id.primitive <= SCTP_EVENT_PRIMITIVE_MAX)
+ return sctp_primitive_tbl[id.primitive];
+ return "unknown_primitive";
+}
+
+static const char *const sctp_other_tbl[] = {
+ "NO_PENDING_TSN",
+ "ICMP_PROTO_UNREACH",
+};
+
+/* Lookup "other" debug name. */
+const char *sctp_oname(const union sctp_subtype id)
+{
+ if (id.other <= SCTP_EVENT_OTHER_MAX)
+ return sctp_other_tbl[id.other];
+ return "unknown 'other' event";
+}
+
+static const char *const sctp_timer_tbl[] = {
+ "TIMEOUT_NONE",
+ "TIMEOUT_T1_COOKIE",
+ "TIMEOUT_T1_INIT",
+ "TIMEOUT_T2_SHUTDOWN",
+ "TIMEOUT_T3_RTX",
+ "TIMEOUT_T4_RTO",
+ "TIMEOUT_T5_SHUTDOWN_GUARD",
+ "TIMEOUT_HEARTBEAT",
+ "TIMEOUT_RECONF",
+ "TIMEOUT_SACK",
+ "TIMEOUT_AUTOCLOSE",
+};
+
+/* Lookup timer debug name. */
+const char *sctp_tname(const union sctp_subtype id)
+{
+ BUILD_BUG_ON(SCTP_EVENT_TIMEOUT_MAX + 1 != ARRAY_SIZE(sctp_timer_tbl));
+
+ if (id.timeout < ARRAY_SIZE(sctp_timer_tbl))
+ return sctp_timer_tbl[id.timeout];
+ return "unknown_timer";
+}