v4.19.13 snapshot.
diff --git a/net/rxrpc/proc.c b/net/rxrpc/proc.c
new file mode 100644
index 0000000..9805e3b
--- /dev/null
+++ b/net/rxrpc/proc.c
@@ -0,0 +1,214 @@
+/* /proc/net/ support for AF_RXRPC
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.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.
+ */
+
+#include <linux/module.h>
+#include <net/sock.h>
+#include <net/af_rxrpc.h>
+#include "ar-internal.h"
+
+static const char *const rxrpc_conn_states[RXRPC_CONN__NR_STATES] = {
+ [RXRPC_CONN_UNUSED] = "Unused ",
+ [RXRPC_CONN_CLIENT] = "Client ",
+ [RXRPC_CONN_SERVICE_PREALLOC] = "SvPrealc",
+ [RXRPC_CONN_SERVICE_UNSECURED] = "SvUnsec ",
+ [RXRPC_CONN_SERVICE_CHALLENGING] = "SvChall ",
+ [RXRPC_CONN_SERVICE] = "SvSecure",
+ [RXRPC_CONN_REMOTELY_ABORTED] = "RmtAbort",
+ [RXRPC_CONN_LOCALLY_ABORTED] = "LocAbort",
+};
+
+/*
+ * generate a list of extant and dead calls in /proc/net/rxrpc_calls
+ */
+static void *rxrpc_call_seq_start(struct seq_file *seq, loff_t *_pos)
+ __acquires(rcu)
+ __acquires(rxnet->call_lock)
+{
+ struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
+ rcu_read_lock();
+ read_lock(&rxnet->call_lock);
+ return seq_list_start_head(&rxnet->calls, *_pos);
+}
+
+static void *rxrpc_call_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
+ return seq_list_next(v, &rxnet->calls, pos);
+}
+
+static void rxrpc_call_seq_stop(struct seq_file *seq, void *v)
+ __releases(rxnet->call_lock)
+ __releases(rcu)
+{
+ struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
+ read_unlock(&rxnet->call_lock);
+ rcu_read_unlock();
+}
+
+static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
+{
+ struct rxrpc_local *local;
+ struct rxrpc_sock *rx;
+ struct rxrpc_peer *peer;
+ struct rxrpc_call *call;
+ struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+ unsigned long timeout = 0;
+ rxrpc_seq_t tx_hard_ack, rx_hard_ack;
+ char lbuff[50], rbuff[50];
+
+ if (v == &rxnet->calls) {
+ seq_puts(seq,
+ "Proto Local "
+ " Remote "
+ " SvID ConnID CallID End Use State Abort "
+ " UserID TxSeq TW RxSeq RW RxSerial RxTimo\n");
+ return 0;
+ }
+
+ call = list_entry(v, struct rxrpc_call, link);
+
+ rx = rcu_dereference(call->socket);
+ if (rx) {
+ local = READ_ONCE(rx->local);
+ if (local)
+ sprintf(lbuff, "%pISpc", &local->srx.transport);
+ else
+ strcpy(lbuff, "no_local");
+ } else {
+ strcpy(lbuff, "no_socket");
+ }
+
+ peer = call->peer;
+ if (peer)
+ sprintf(rbuff, "%pISpc", &peer->srx.transport);
+ else
+ strcpy(rbuff, "no_connection");
+
+ if (call->state != RXRPC_CALL_SERVER_PREALLOC) {
+ timeout = READ_ONCE(call->expect_rx_by);
+ timeout -= jiffies;
+ }
+
+ tx_hard_ack = READ_ONCE(call->tx_hard_ack);
+ rx_hard_ack = READ_ONCE(call->rx_hard_ack);
+ seq_printf(seq,
+ "UDP %-47.47s %-47.47s %4x %08x %08x %s %3u"
+ " %-8.8s %08x %lx %08x %02x %08x %02x %08x %06lx\n",
+ lbuff,
+ rbuff,
+ call->service_id,
+ call->cid,
+ call->call_id,
+ rxrpc_is_service_call(call) ? "Svc" : "Clt",
+ atomic_read(&call->usage),
+ rxrpc_call_states[call->state],
+ call->abort_code,
+ call->user_call_ID,
+ tx_hard_ack, READ_ONCE(call->tx_top) - tx_hard_ack,
+ rx_hard_ack, READ_ONCE(call->rx_top) - rx_hard_ack,
+ call->rx_serial,
+ timeout);
+
+ return 0;
+}
+
+const struct seq_operations rxrpc_call_seq_ops = {
+ .start = rxrpc_call_seq_start,
+ .next = rxrpc_call_seq_next,
+ .stop = rxrpc_call_seq_stop,
+ .show = rxrpc_call_seq_show,
+};
+
+/*
+ * generate a list of extant virtual connections in /proc/net/rxrpc_conns
+ */
+static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
+ __acquires(rxnet->conn_lock)
+{
+ struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
+ read_lock(&rxnet->conn_lock);
+ return seq_list_start_head(&rxnet->conn_proc_list, *_pos);
+}
+
+static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
+ loff_t *pos)
+{
+ struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
+ return seq_list_next(v, &rxnet->conn_proc_list, pos);
+}
+
+static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
+ __releases(rxnet->conn_lock)
+{
+ struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
+ read_unlock(&rxnet->conn_lock);
+}
+
+static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
+{
+ struct rxrpc_connection *conn;
+ struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+ char lbuff[50], rbuff[50];
+
+ if (v == &rxnet->conn_proc_list) {
+ seq_puts(seq,
+ "Proto Local "
+ " Remote "
+ " SvID ConnID End Use State Key "
+ " Serial ISerial\n"
+ );
+ return 0;
+ }
+
+ conn = list_entry(v, struct rxrpc_connection, proc_link);
+ if (conn->state == RXRPC_CONN_SERVICE_PREALLOC) {
+ strcpy(lbuff, "no_local");
+ strcpy(rbuff, "no_connection");
+ goto print;
+ }
+
+ sprintf(lbuff, "%pISpc", &conn->params.local->srx.transport);
+
+ sprintf(rbuff, "%pISpc", &conn->params.peer->srx.transport);
+print:
+ seq_printf(seq,
+ "UDP %-47.47s %-47.47s %4x %08x %s %3u"
+ " %s %08x %08x %08x %08x %08x %08x %08x\n",
+ lbuff,
+ rbuff,
+ conn->service_id,
+ conn->proto.cid,
+ rxrpc_conn_is_service(conn) ? "Svc" : "Clt",
+ atomic_read(&conn->usage),
+ rxrpc_conn_states[conn->state],
+ key_serial(conn->params.key),
+ atomic_read(&conn->serial),
+ conn->hi_serial,
+ conn->channels[0].call_id,
+ conn->channels[1].call_id,
+ conn->channels[2].call_id,
+ conn->channels[3].call_id);
+
+ return 0;
+}
+
+const struct seq_operations rxrpc_connection_seq_ops = {
+ .start = rxrpc_connection_seq_start,
+ .next = rxrpc_connection_seq_next,
+ .stop = rxrpc_connection_seq_stop,
+ .show = rxrpc_connection_seq_show,
+};