1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* /proc/net/ support for AF_RXRPC
3 *
4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8 #include <linux/module.h>
9 #include <net/sock.h>
10 #include <net/af_rxrpc.h>
11 #include "ar-internal.h"
12
13 static const char *const rxrpc_conn_states[RXRPC_CONN__NR_STATES] = {
14 [RXRPC_CONN_UNUSED] = "Unused ",
15 [RXRPC_CONN_CLIENT] = "Client ",
16 [RXRPC_CONN_SERVICE_PREALLOC] = "SvPrealc",
17 [RXRPC_CONN_SERVICE_UNSECURED] = "SvUnsec ",
18 [RXRPC_CONN_SERVICE_CHALLENGING] = "SvChall ",
19 [RXRPC_CONN_SERVICE] = "SvSecure",
20 [RXRPC_CONN_REMOTELY_ABORTED] = "RmtAbort",
21 [RXRPC_CONN_LOCALLY_ABORTED] = "LocAbort",
22 };
23
24 /*
25 * generate a list of extant and dead calls in /proc/net/rxrpc_calls
26 */
rxrpc_call_seq_start(struct seq_file * seq,loff_t * _pos)27 static void *rxrpc_call_seq_start(struct seq_file *seq, loff_t *_pos)
28 __acquires(rcu)
29 __acquires(rxnet->call_lock)
30 {
31 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
32
33 rcu_read_lock();
34 read_lock(&rxnet->call_lock);
35 return seq_list_start_head(&rxnet->calls, *_pos);
36 }
37
rxrpc_call_seq_next(struct seq_file * seq,void * v,loff_t * pos)38 static void *rxrpc_call_seq_next(struct seq_file *seq, void *v, loff_t *pos)
39 {
40 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
41
42 return seq_list_next(v, &rxnet->calls, pos);
43 }
44
rxrpc_call_seq_stop(struct seq_file * seq,void * v)45 static void rxrpc_call_seq_stop(struct seq_file *seq, void *v)
46 __releases(rxnet->call_lock)
47 __releases(rcu)
48 {
49 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
50
51 read_unlock(&rxnet->call_lock);
52 rcu_read_unlock();
53 }
54
rxrpc_call_seq_show(struct seq_file * seq,void * v)55 static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
56 {
57 struct rxrpc_local *local;
58 struct rxrpc_sock *rx;
59 struct rxrpc_peer *peer;
60 struct rxrpc_call *call;
61 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
62 unsigned long timeout = 0;
63 rxrpc_seq_t tx_hard_ack, rx_hard_ack;
64 char lbuff[50], rbuff[50];
65
66 if (v == &rxnet->calls) {
67 seq_puts(seq,
68 "Proto Local "
69 " Remote "
70 " SvID ConnID CallID End Use State Abort "
71 " DebugId TxSeq TW RxSeq RW RxSerial RxTimo\n");
72 return 0;
73 }
74
75 call = list_entry(v, struct rxrpc_call, link);
76
77 rx = rcu_dereference(call->socket);
78 if (rx) {
79 local = READ_ONCE(rx->local);
80 if (local)
81 sprintf(lbuff, "%pISpc", &local->srx.transport);
82 else
83 strcpy(lbuff, "no_local");
84 } else {
85 strcpy(lbuff, "no_socket");
86 }
87
88 peer = call->peer;
89 if (peer)
90 sprintf(rbuff, "%pISpc", &peer->srx.transport);
91 else
92 strcpy(rbuff, "no_connection");
93
94 if (call->state != RXRPC_CALL_SERVER_PREALLOC) {
95 timeout = READ_ONCE(call->expect_rx_by);
96 timeout -= jiffies;
97 }
98
99 tx_hard_ack = READ_ONCE(call->tx_hard_ack);
100 rx_hard_ack = READ_ONCE(call->rx_hard_ack);
101 seq_printf(seq,
102 "UDP %-47.47s %-47.47s %4x %08x %08x %s %3u"
103 " %-8.8s %08x %08x %08x %02x %08x %02x %08x %06lx\n",
104 lbuff,
105 rbuff,
106 call->service_id,
107 call->cid,
108 call->call_id,
109 rxrpc_is_service_call(call) ? "Svc" : "Clt",
110 atomic_read(&call->usage),
111 rxrpc_call_states[call->state],
112 call->abort_code,
113 call->debug_id,
114 tx_hard_ack, READ_ONCE(call->tx_top) - tx_hard_ack,
115 rx_hard_ack, READ_ONCE(call->rx_top) - rx_hard_ack,
116 call->rx_serial,
117 timeout);
118
119 return 0;
120 }
121
122 const struct seq_operations rxrpc_call_seq_ops = {
123 .start = rxrpc_call_seq_start,
124 .next = rxrpc_call_seq_next,
125 .stop = rxrpc_call_seq_stop,
126 .show = rxrpc_call_seq_show,
127 };
128
129 /*
130 * generate a list of extant virtual connections in /proc/net/rxrpc_conns
131 */
rxrpc_connection_seq_start(struct seq_file * seq,loff_t * _pos)132 static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
133 __acquires(rxnet->conn_lock)
134 {
135 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
136
137 read_lock(&rxnet->conn_lock);
138 return seq_list_start_head(&rxnet->conn_proc_list, *_pos);
139 }
140
rxrpc_connection_seq_next(struct seq_file * seq,void * v,loff_t * pos)141 static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
142 loff_t *pos)
143 {
144 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
145
146 return seq_list_next(v, &rxnet->conn_proc_list, pos);
147 }
148
rxrpc_connection_seq_stop(struct seq_file * seq,void * v)149 static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
150 __releases(rxnet->conn_lock)
151 {
152 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
153
154 read_unlock(&rxnet->conn_lock);
155 }
156
rxrpc_connection_seq_show(struct seq_file * seq,void * v)157 static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
158 {
159 struct rxrpc_connection *conn;
160 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
161 char lbuff[50], rbuff[50];
162
163 if (v == &rxnet->conn_proc_list) {
164 seq_puts(seq,
165 "Proto Local "
166 " Remote "
167 " SvID ConnID End Use State Key "
168 " Serial ISerial CallId0 CallId1 CallId2 CallId3\n"
169 );
170 return 0;
171 }
172
173 conn = list_entry(v, struct rxrpc_connection, proc_link);
174 if (conn->state == RXRPC_CONN_SERVICE_PREALLOC) {
175 strcpy(lbuff, "no_local");
176 strcpy(rbuff, "no_connection");
177 goto print;
178 }
179
180 sprintf(lbuff, "%pISpc", &conn->params.local->srx.transport);
181
182 sprintf(rbuff, "%pISpc", &conn->params.peer->srx.transport);
183 print:
184 seq_printf(seq,
185 "UDP %-47.47s %-47.47s %4x %08x %s %3u"
186 " %s %08x %08x %08x %08x %08x %08x %08x\n",
187 lbuff,
188 rbuff,
189 conn->service_id,
190 conn->proto.cid,
191 rxrpc_conn_is_service(conn) ? "Svc" : "Clt",
192 atomic_read(&conn->usage),
193 rxrpc_conn_states[conn->state],
194 key_serial(conn->params.key),
195 atomic_read(&conn->serial),
196 conn->hi_serial,
197 conn->channels[0].call_id,
198 conn->channels[1].call_id,
199 conn->channels[2].call_id,
200 conn->channels[3].call_id);
201
202 return 0;
203 }
204
205 const struct seq_operations rxrpc_connection_seq_ops = {
206 .start = rxrpc_connection_seq_start,
207 .next = rxrpc_connection_seq_next,
208 .stop = rxrpc_connection_seq_stop,
209 .show = rxrpc_connection_seq_show,
210 };
211
212 /*
213 * generate a list of extant virtual peers in /proc/net/rxrpc/peers
214 */
rxrpc_peer_seq_show(struct seq_file * seq,void * v)215 static int rxrpc_peer_seq_show(struct seq_file *seq, void *v)
216 {
217 struct rxrpc_peer *peer;
218 time64_t now;
219 char lbuff[50], rbuff[50];
220
221 if (v == SEQ_START_TOKEN) {
222 seq_puts(seq,
223 "Proto Local "
224 " Remote "
225 " Use CW MTU LastUse RTT RTO\n"
226 );
227 return 0;
228 }
229
230 peer = list_entry(v, struct rxrpc_peer, hash_link);
231
232 sprintf(lbuff, "%pISpc", &peer->local->srx.transport);
233
234 sprintf(rbuff, "%pISpc", &peer->srx.transport);
235
236 now = ktime_get_seconds();
237 seq_printf(seq,
238 "UDP %-47.47s %-47.47s %3u"
239 " %3u %5u %6llus %8u %8u\n",
240 lbuff,
241 rbuff,
242 atomic_read(&peer->usage),
243 peer->cong_cwnd,
244 peer->mtu,
245 now - peer->last_tx_at,
246 peer->srtt_us >> 3,
247 jiffies_to_usecs(peer->rto_j));
248
249 return 0;
250 }
251
rxrpc_peer_seq_start(struct seq_file * seq,loff_t * _pos)252 static void *rxrpc_peer_seq_start(struct seq_file *seq, loff_t *_pos)
253 __acquires(rcu)
254 {
255 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
256 unsigned int bucket, n;
257 unsigned int shift = 32 - HASH_BITS(rxnet->peer_hash);
258 void *p;
259
260 rcu_read_lock();
261
262 if (*_pos >= UINT_MAX)
263 return NULL;
264
265 n = *_pos & ((1U << shift) - 1);
266 bucket = *_pos >> shift;
267 for (;;) {
268 if (bucket >= HASH_SIZE(rxnet->peer_hash)) {
269 *_pos = UINT_MAX;
270 return NULL;
271 }
272 if (n == 0) {
273 if (bucket == 0)
274 return SEQ_START_TOKEN;
275 *_pos += 1;
276 n++;
277 }
278
279 p = seq_hlist_start_rcu(&rxnet->peer_hash[bucket], n - 1);
280 if (p)
281 return p;
282 bucket++;
283 n = 1;
284 *_pos = (bucket << shift) | n;
285 }
286 }
287
rxrpc_peer_seq_next(struct seq_file * seq,void * v,loff_t * _pos)288 static void *rxrpc_peer_seq_next(struct seq_file *seq, void *v, loff_t *_pos)
289 {
290 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
291 unsigned int bucket, n;
292 unsigned int shift = 32 - HASH_BITS(rxnet->peer_hash);
293 void *p;
294
295 if (*_pos >= UINT_MAX)
296 return NULL;
297
298 bucket = *_pos >> shift;
299
300 p = seq_hlist_next_rcu(v, &rxnet->peer_hash[bucket], _pos);
301 if (p)
302 return p;
303
304 for (;;) {
305 bucket++;
306 n = 1;
307 *_pos = (bucket << shift) | n;
308
309 if (bucket >= HASH_SIZE(rxnet->peer_hash)) {
310 *_pos = UINT_MAX;
311 return NULL;
312 }
313 if (n == 0) {
314 *_pos += 1;
315 n++;
316 }
317
318 p = seq_hlist_start_rcu(&rxnet->peer_hash[bucket], n - 1);
319 if (p)
320 return p;
321 }
322 }
323
rxrpc_peer_seq_stop(struct seq_file * seq,void * v)324 static void rxrpc_peer_seq_stop(struct seq_file *seq, void *v)
325 __releases(rcu)
326 {
327 rcu_read_unlock();
328 }
329
330
331 const struct seq_operations rxrpc_peer_seq_ops = {
332 .start = rxrpc_peer_seq_start,
333 .next = rxrpc_peer_seq_next,
334 .stop = rxrpc_peer_seq_stop,
335 .show = rxrpc_peer_seq_show,
336 };
337
