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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 __acquires(rcu)
33 __acquires(rxnet->call_lock)
34{
35 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
36
37 rcu_read_lock();
38 read_lock(&rxnet->call_lock);
39 return seq_list_start_head(&rxnet->calls, *_pos);
40}
41
42static void *rxrpc_call_seq_next(struct seq_file *seq, void *v, loff_t *pos)
43{
44 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
45
46 return seq_list_next(v, &rxnet->calls, pos);
47}
48
49static void rxrpc_call_seq_stop(struct seq_file *seq, void *v)
50 __releases(rxnet->call_lock)
51 __releases(rcu)
52{
53 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
54
55 read_unlock(&rxnet->call_lock);
56 rcu_read_unlock();
57}
58
59static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
60{
61 struct rxrpc_local *local;
62 struct rxrpc_sock *rx;
63 struct rxrpc_peer *peer;
64 struct rxrpc_call *call;
65 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
66 rxrpc_seq_t tx_hard_ack, rx_hard_ack;
67 char lbuff[50], rbuff[50];
68
69 if (v == &rxnet->calls) {
70 seq_puts(seq,
71 "Proto Local "
72 " Remote "
73 " SvID ConnID CallID End Use State Abort "
74 " UserID\n");
75 return 0;
76 }
77
78 call = list_entry(v, struct rxrpc_call, link);
79
80 rx = rcu_dereference(call->socket);
81 if (rx) {
82 local = READ_ONCE(rx->local);
83 if (local)
84 sprintf(lbuff, "%pISpc", &local->srx.transport);
85 else
86 strcpy(lbuff, "no_local");
87 } else {
88 strcpy(lbuff, "no_socket");
89 }
90
91 peer = call->peer;
92 if (peer)
93 sprintf(rbuff, "%pISpc", &peer->srx.transport);
94 else
95 strcpy(rbuff, "no_connection");
96
97 tx_hard_ack = READ_ONCE(call->tx_hard_ack);
98 rx_hard_ack = READ_ONCE(call->rx_hard_ack);
99 seq_printf(seq,
100 "UDP %-47.47s %-47.47s %4x %08x %08x %s %3u"
101 " %-8.8s %08x %lx %08x %02x %08x %02x\n",
102 lbuff,
103 rbuff,
104 call->service_id,
105 call->cid,
106 call->call_id,
107 rxrpc_is_service_call(call) ? "Svc" : "Clt",
108 atomic_read(&call->usage),
109 rxrpc_call_states[call->state],
110 call->abort_code,
111 call->user_call_ID,
112 tx_hard_ack, READ_ONCE(call->tx_top) - tx_hard_ack,
113 rx_hard_ack, READ_ONCE(call->rx_top) - rx_hard_ack);
114
115 return 0;
116}
117
118static const struct seq_operations rxrpc_call_seq_ops = {
119 .start = rxrpc_call_seq_start,
120 .next = rxrpc_call_seq_next,
121 .stop = rxrpc_call_seq_stop,
122 .show = rxrpc_call_seq_show,
123};
124
125static int rxrpc_call_seq_open(struct inode *inode, struct file *file)
126{
127 return seq_open_net(inode, file, &rxrpc_call_seq_ops,
128 sizeof(struct seq_net_private));
129}
130
131const struct file_operations rxrpc_call_seq_fops = {
132 .open = rxrpc_call_seq_open,
133 .read = seq_read,
134 .llseek = seq_lseek,
135 .release = seq_release,
136};
137
138/*
139 * generate a list of extant virtual connections in /proc/net/rxrpc_conns
140 */
141static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
142 __acquires(rxnet->conn_lock)
143{
144 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
145
146 read_lock(&rxnet->conn_lock);
147 return seq_list_start_head(&rxnet->conn_proc_list, *_pos);
148}
149
150static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
151 loff_t *pos)
152{
153 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
154
155 return seq_list_next(v, &rxnet->conn_proc_list, pos);
156}
157
158static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
159 __releases(rxnet->conn_lock)
160{
161 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
162
163 read_unlock(&rxnet->conn_lock);
164}
165
166static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
167{
168 struct rxrpc_connection *conn;
169 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
170 char lbuff[50], rbuff[50];
171
172 if (v == &rxnet->conn_proc_list) {
173 seq_puts(seq,
174 "Proto Local "
175 " Remote "
176 " SvID ConnID End Use State Key "
177 " Serial ISerial\n"
178 );
179 return 0;
180 }
181
182 conn = list_entry(v, struct rxrpc_connection, proc_link);
183 if (conn->state == RXRPC_CONN_SERVICE_PREALLOC) {
184 strcpy(lbuff, "no_local");
185 strcpy(rbuff, "no_connection");
186 goto print;
187 }
188
189 sprintf(lbuff, "%pISpc", &conn->params.local->srx.transport);
190
191 sprintf(rbuff, "%pISpc", &conn->params.peer->srx.transport);
192print:
193 seq_printf(seq,
194 "UDP %-47.47s %-47.47s %4x %08x %s %3u"
195 " %s %08x %08x %08x\n",
196 lbuff,
197 rbuff,
198 conn->service_id,
199 conn->proto.cid,
200 rxrpc_conn_is_service(conn) ? "Svc" : "Clt",
201 atomic_read(&conn->usage),
202 rxrpc_conn_states[conn->state],
203 key_serial(conn->params.key),
204 atomic_read(&conn->serial),
205 conn->hi_serial);
206
207 return 0;
208}
209
210static const struct seq_operations rxrpc_connection_seq_ops = {
211 .start = rxrpc_connection_seq_start,
212 .next = rxrpc_connection_seq_next,
213 .stop = rxrpc_connection_seq_stop,
214 .show = rxrpc_connection_seq_show,
215};
216
217
218static int rxrpc_connection_seq_open(struct inode *inode, struct file *file)
219{
220 return seq_open_net(inode, file, &rxrpc_connection_seq_ops,
221 sizeof(struct seq_net_private));
222}
223
224const struct file_operations rxrpc_connection_seq_fops = {
225 .open = rxrpc_connection_seq_open,
226 .read = seq_read,
227 .llseek = seq_lseek,
228 .release = seq_release,
229};