1/* /proc/net/ support for AF_RXRPC
  2 *
  3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  4 * Written by David Howells (dhowells@redhat.com)
  5 *
  6 * This program is free software; you can redistribute it and/or
  7 * modify it under the terms of the GNU General Public License
  8 * as published by the Free Software Foundation; either version
  9 * 2 of the License, or (at your option) any later version.
 10 */
 11
 12#include <linux/module.h>
 13#include <net/sock.h>
 14#include <net/af_rxrpc.h>
 15#include "ar-internal.h"
 16
 17static const char *const rxrpc_conn_states[RXRPC_CONN__NR_STATES] = {
 18	[RXRPC_CONN_UNUSED]			= "Unused  ",
 19	[RXRPC_CONN_CLIENT]			= "Client  ",
 20	[RXRPC_CONN_SERVICE_PREALLOC]		= "SvPrealc",
 21	[RXRPC_CONN_SERVICE_UNSECURED]		= "SvUnsec ",
 22	[RXRPC_CONN_SERVICE_CHALLENGING]	= "SvChall ",
 23	[RXRPC_CONN_SERVICE]			= "SvSecure",
 24	[RXRPC_CONN_REMOTELY_ABORTED]		= "RmtAbort",
 25	[RXRPC_CONN_LOCALLY_ABORTED]		= "LocAbort",
 26};
 27
 28/*
 29 * generate a list of extant and dead calls in /proc/net/rxrpc_calls
 30 */
 31static void *rxrpc_call_seq_start(struct seq_file *seq, loff_t *_pos)
 32{
 33	rcu_read_lock();
 34	read_lock(&rxrpc_call_lock);
 35	return seq_list_start_head(&rxrpc_calls, *_pos);
 36}
 37
 38static void *rxrpc_call_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 39{
 40	return seq_list_next(v, &rxrpc_calls, pos);
 41}
 42
 43static void rxrpc_call_seq_stop(struct seq_file *seq, void *v)
 44{
 45	read_unlock(&rxrpc_call_lock);
 46	rcu_read_unlock();
 47}
 48
 49static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
 50{
 51	struct rxrpc_local *local;
 52	struct rxrpc_sock *rx;
 53	struct rxrpc_peer *peer;
 54	struct rxrpc_call *call;
 55	char lbuff[50], rbuff[50];
 56
 57	if (v == &rxrpc_calls) {
 58		seq_puts(seq,
 59			 "Proto Local                                          "
 60			 " Remote                                         "
 61			 " SvID ConnID   CallID   End Use State    Abort   "
 62			 " UserID\n");
 63		return 0;
 64	}
 65
 66	call = list_entry(v, struct rxrpc_call, link);
 67
 68	rx = rcu_dereference(call->socket);
 69	if (rx) {
 70		local = READ_ONCE(rx->local);
 71		if (local)
 72			sprintf(lbuff, "%pISpc", &local->srx.transport);
 73		else
 74			strcpy(lbuff, "no_local");
 75	} else {
 76		strcpy(lbuff, "no_socket");
 77	}
 78
 79	peer = call->peer;
 80	if (peer)
 81		sprintf(rbuff, "%pISpc", &peer->srx.transport);
 82	else
 83		strcpy(rbuff, "no_connection");
 84
 85	seq_printf(seq,
 86		   "UDP   %-47.47s %-47.47s %4x %08x %08x %s %3u"
 87		   " %-8.8s %08x %lx\n",
 88		   lbuff,
 89		   rbuff,
 90		   call->service_id,
 91		   call->cid,
 92		   call->call_id,
 93		   rxrpc_is_service_call(call) ? "Svc" : "Clt",
 94		   atomic_read(&call->usage),
 95		   rxrpc_call_states[call->state],
 96		   call->abort_code,
 97		   call->user_call_ID);
 98
 99	return 0;
100}
101
102static const struct seq_operations rxrpc_call_seq_ops = {
103	.start  = rxrpc_call_seq_start,
104	.next   = rxrpc_call_seq_next,
105	.stop   = rxrpc_call_seq_stop,
106	.show   = rxrpc_call_seq_show,
107};
108
109static int rxrpc_call_seq_open(struct inode *inode, struct file *file)
110{
111	return seq_open(file, &rxrpc_call_seq_ops);
112}
113
114const struct file_operations rxrpc_call_seq_fops = {
115	.owner		= THIS_MODULE,
116	.open		= rxrpc_call_seq_open,
117	.read		= seq_read,
118	.llseek		= seq_lseek,
119	.release	= seq_release,
120};
121
122/*
123 * generate a list of extant virtual connections in /proc/net/rxrpc_conns
124 */
125static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
126{
127	read_lock(&rxrpc_connection_lock);
128	return seq_list_start_head(&rxrpc_connection_proc_list, *_pos);
129}
130
131static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
132				       loff_t *pos)
133{
134	return seq_list_next(v, &rxrpc_connection_proc_list, pos);
135}
136
137static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
138{
139	read_unlock(&rxrpc_connection_lock);
140}
141
142static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
143{
144	struct rxrpc_connection *conn;
145	char lbuff[50], rbuff[50];
146
147	if (v == &rxrpc_connection_proc_list) {
148		seq_puts(seq,
149			 "Proto Local                                          "
150			 " Remote                                         "
151			 " SvID ConnID   End Use State    Key     "
152			 " Serial   ISerial\n"
153			 );
154		return 0;
155	}
156
157	conn = list_entry(v, struct rxrpc_connection, proc_link);
158	if (conn->state == RXRPC_CONN_SERVICE_PREALLOC) {
159		strcpy(lbuff, "no_local");
160		strcpy(rbuff, "no_connection");
161		goto print;
162	}
163
164	sprintf(lbuff, "%pISpc", &conn->params.local->srx.transport);
165
166	sprintf(rbuff, "%pISpc", &conn->params.peer->srx.transport);
167print:
168	seq_printf(seq,
169		   "UDP   %-47.47s %-47.47s %4x %08x %s %3u"
170		   " %s %08x %08x %08x\n",
171		   lbuff,
172		   rbuff,
173		   conn->params.service_id,
174		   conn->proto.cid,
175		   rxrpc_conn_is_service(conn) ? "Svc" : "Clt",
176		   atomic_read(&conn->usage),
177		   rxrpc_conn_states[conn->state],
178		   key_serial(conn->params.key),
179		   atomic_read(&conn->serial),
180		   conn->hi_serial);
181
182	return 0;
183}
184
185static const struct seq_operations rxrpc_connection_seq_ops = {
186	.start  = rxrpc_connection_seq_start,
187	.next   = rxrpc_connection_seq_next,
188	.stop   = rxrpc_connection_seq_stop,
189	.show   = rxrpc_connection_seq_show,
190};
191
192
193static int rxrpc_connection_seq_open(struct inode *inode, struct file *file)
194{
195	return seq_open(file, &rxrpc_connection_seq_ops);
196}
197
198const struct file_operations rxrpc_connection_seq_fops = {
199	.owner		= THIS_MODULE,
200	.open		= rxrpc_connection_seq_open,
201	.read		= seq_read,
202	.llseek		= seq_lseek,
203	.release	= seq_release,
204};