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_UNSECURED] = "ClUnsec ",
16 [RXRPC_CONN_CLIENT] = "Client ",
17 [RXRPC_CONN_SERVICE_PREALLOC] = "SvPrealc",
18 [RXRPC_CONN_SERVICE_UNSECURED] = "SvUnsec ",
19 [RXRPC_CONN_SERVICE_CHALLENGING] = "SvChall ",
20 [RXRPC_CONN_SERVICE] = "SvSecure",
21 [RXRPC_CONN_ABORTED] = "Aborted ",
22 };
23
24 /*
25 * generate a list of extant and dead calls in /proc/net/rxrpc_calls
26 */
27 static void *rxrpc_call_seq_start(struct seq_file *seq, loff_t *_pos)
28 __acquires(rcu)
29 {
30 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
31
32 rcu_read_lock();
33 return seq_list_start_head_rcu(&rxnet->calls, *_pos);
34 }
35
36 static void *rxrpc_call_seq_next(struct seq_file *seq, void *v, loff_t *pos)
37 {
38 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
39
40 return seq_list_next_rcu(v, &rxnet->calls, pos);
41 }
42
43 static void rxrpc_call_seq_stop(struct seq_file *seq, void *v)
44 __releases(rcu)
45 {
46 rcu_read_unlock();
47 }
48
49 static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
50 {
51 struct rxrpc_local *local;
52 struct rxrpc_call *call;
53 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
54 enum rxrpc_call_state state;
55 rxrpc_seq_t acks_hard_ack;
56 char lbuff[50], rbuff[50];
57 long timeout = 0;
58
59 if (v == &rxnet->calls) {
60 seq_puts(seq,
61 "Proto Local "
62 " Remote "
63 " SvID ConnID CallID End Use State Abort "
64 " DebugId TxSeq TW RxSeq RW RxSerial CW RxTimo\n");
65 return 0;
66 }
67
68 call = list_entry(v, struct rxrpc_call, link);
69
70 local = call->local;
71 if (local)
72 sprintf(lbuff, "%pISpc", &local->srx.transport);
73 else
74 strcpy(lbuff, "no_local");
75
76 sprintf(rbuff, "%pISpc", &call->dest_srx.transport);
77
78 state = rxrpc_call_state(call);
79 if (state != RXRPC_CALL_SERVER_PREALLOC)
80 timeout = ktime_ms_delta(READ_ONCE(call->expect_rx_by), ktime_get_real());
81
82 acks_hard_ack = READ_ONCE(call->acks_hard_ack);
83 seq_printf(seq,
84 "UDP %-47.47s %-47.47s %4x %08x %08x %s %3u"
85 " %-8.8s %08x %08x %08x %02x %08x %02x %08x %02x %06lx\n",
86 lbuff,
87 rbuff,
88 call->dest_srx.srx_service,
89 call->cid,
90 call->call_id,
91 rxrpc_is_service_call(call) ? "Svc" : "Clt",
92 refcount_read(&call->ref),
93 rxrpc_call_states[state],
94 call->abort_code,
95 call->debug_id,
96 acks_hard_ack, READ_ONCE(call->tx_top) - acks_hard_ack,
97 call->ackr_window, call->ackr_wtop - call->ackr_window,
98 call->rx_serial,
99 call->cong_cwnd,
100 timeout);
101
102 return 0;
103 }
104
105 const struct seq_operations rxrpc_call_seq_ops = {
106 .start = rxrpc_call_seq_start,
107 .next = rxrpc_call_seq_next,
108 .stop = rxrpc_call_seq_stop,
109 .show = rxrpc_call_seq_show,
110 };
111
112 /*
113 * generate a list of extant virtual connections in /proc/net/rxrpc_conns
114 */
115 static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
116 __acquires(rxnet->conn_lock)
117 {
118 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
119
120 read_lock(&rxnet->conn_lock);
121 return seq_list_start_head(&rxnet->conn_proc_list, *_pos);
122 }
123
124 static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
125 loff_t *pos)
126 {
127 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
128
129 return seq_list_next(v, &rxnet->conn_proc_list, pos);
130 }
131
132 static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
133 __releases(rxnet->conn_lock)
134 {
135 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
136
137 read_unlock(&rxnet->conn_lock);
138 }
139
140 static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
141 {
142 struct rxrpc_connection *conn;
143 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
144 const char *state;
145 char lbuff[50], rbuff[50];
146
147 if (v == &rxnet->conn_proc_list) {
148 seq_puts(seq,
149 "Proto Local "
150 " Remote "
151 " SvID ConnID End Ref Act State Key "
152 " Serial ISerial CallId0 CallId1 CallId2 CallId3\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->local->srx.transport);
165 sprintf(rbuff, "%pISpc", &conn->peer->srx.transport);
166 print:
167 state = rxrpc_is_conn_aborted(conn) ?
168 rxrpc_call_completions[conn->completion] :
169 rxrpc_conn_states[conn->state];
170 seq_printf(seq,
171 "UDP %-47.47s %-47.47s %4x %08x %s %3u %3d"
172 " %s %08x %08x %08x %08x %08x %08x %08x\n",
173 lbuff,
174 rbuff,
175 conn->service_id,
176 conn->proto.cid,
177 rxrpc_conn_is_service(conn) ? "Svc" : "Clt",
178 refcount_read(&conn->ref),
179 atomic_read(&conn->active),
180 state,
181 key_serial(conn->key),
182 conn->tx_serial,
183 conn->hi_serial,
184 conn->channels[0].call_id,
185 conn->channels[1].call_id,
186 conn->channels[2].call_id,
187 conn->channels[3].call_id);
188
189 return 0;
190 }
191
192 const struct seq_operations rxrpc_connection_seq_ops = {
193 .start = rxrpc_connection_seq_start,
194 .next = rxrpc_connection_seq_next,
195 .stop = rxrpc_connection_seq_stop,
196 .show = rxrpc_connection_seq_show,
197 };
198
199 /*
200 * generate a list of extant virtual bundles in /proc/net/rxrpc/bundles
201 */
202 static void *rxrpc_bundle_seq_start(struct seq_file *seq, loff_t *_pos)
203 __acquires(rxnet->conn_lock)
204 {
205 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
206
207 read_lock(&rxnet->conn_lock);
208 return seq_list_start_head(&rxnet->bundle_proc_list, *_pos);
209 }
210
211 static void *rxrpc_bundle_seq_next(struct seq_file *seq, void *v,
212 loff_t *pos)
213 {
214 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
215
216 return seq_list_next(v, &rxnet->bundle_proc_list, pos);
217 }
218
219 static void rxrpc_bundle_seq_stop(struct seq_file *seq, void *v)
220 __releases(rxnet->conn_lock)
221 {
222 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
223
224 read_unlock(&rxnet->conn_lock);
225 }
226
227 static int rxrpc_bundle_seq_show(struct seq_file *seq, void *v)
228 {
229 struct rxrpc_bundle *bundle;
230 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
231 char lbuff[50], rbuff[50];
232
233 if (v == &rxnet->bundle_proc_list) {
234 seq_puts(seq,
235 "Proto Local "
236 " Remote "
237 " SvID Ref Act Flg Key |"
238 " Bundle Conn_0 Conn_1 Conn_2 Conn_3\n"
239 );
240 return 0;
241 }
242
243 bundle = list_entry(v, struct rxrpc_bundle, proc_link);
244
245 sprintf(lbuff, "%pISpc", &bundle->local->srx.transport);
246 sprintf(rbuff, "%pISpc", &bundle->peer->srx.transport);
247 seq_printf(seq,
248 "UDP %-47.47s %-47.47s %4x %3u %3d"
249 " %c%c%c %08x | %08x %08x %08x %08x %08x\n",
250 lbuff,
251 rbuff,
252 bundle->service_id,
253 refcount_read(&bundle->ref),
254 atomic_read(&bundle->active),
255 bundle->try_upgrade ? 'U' : '-',
256 bundle->exclusive ? 'e' : '-',
257 bundle->upgrade ? 'u' : '-',
258 key_serial(bundle->key),
259 bundle->debug_id,
260 bundle->conn_ids[0],
261 bundle->conn_ids[1],
262 bundle->conn_ids[2],
263 bundle->conn_ids[3]);
264
265 return 0;
266 }
267
268 const struct seq_operations rxrpc_bundle_seq_ops = {
269 .start = rxrpc_bundle_seq_start,
270 .next = rxrpc_bundle_seq_next,
271 .stop = rxrpc_bundle_seq_stop,
272 .show = rxrpc_bundle_seq_show,
273 };
274
275 /*
276 * generate a list of extant virtual peers in /proc/net/rxrpc/peers
277 */
278 static int rxrpc_peer_seq_show(struct seq_file *seq, void *v)
279 {
280 struct rxrpc_peer *peer;
281 time64_t now;
282 char lbuff[50], rbuff[50];
283
284 if (v == SEQ_START_TOKEN) {
285 seq_puts(seq,
286 "Proto Local "
287 " Remote "
288 " Use SST MTU LastUse RTT RTO\n"
289 );
290 return 0;
291 }
292
293 peer = list_entry(v, struct rxrpc_peer, hash_link);
294
295 sprintf(lbuff, "%pISpc", &peer->local->srx.transport);
296
297 sprintf(rbuff, "%pISpc", &peer->srx.transport);
298
299 now = ktime_get_seconds();
300 seq_printf(seq,
301 "UDP %-47.47s %-47.47s %3u"
302 " %3u %5u %6llus %8u %8u\n",
303 lbuff,
304 rbuff,
305 refcount_read(&peer->ref),
306 peer->cong_ssthresh,
307 peer->mtu,
308 now - peer->last_tx_at,
309 peer->srtt_us >> 3,
310 peer->rto_us);
311
312 return 0;
313 }
314
315 static void *rxrpc_peer_seq_start(struct seq_file *seq, loff_t *_pos)
316 __acquires(rcu)
317 {
318 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
319 unsigned int bucket, n;
320 unsigned int shift = 32 - HASH_BITS(rxnet->peer_hash);
321 void *p;
322
323 rcu_read_lock();
324
325 if (*_pos >= UINT_MAX)
326 return NULL;
327
328 n = *_pos & ((1U << shift) - 1);
329 bucket = *_pos >> shift;
330 for (;;) {
331 if (bucket >= HASH_SIZE(rxnet->peer_hash)) {
332 *_pos = UINT_MAX;
333 return NULL;
334 }
335 if (n == 0) {
336 if (bucket == 0)
337 return SEQ_START_TOKEN;
338 *_pos += 1;
339 n++;
340 }
341
342 p = seq_hlist_start_rcu(&rxnet->peer_hash[bucket], n - 1);
343 if (p)
344 return p;
345 bucket++;
346 n = 1;
347 *_pos = (bucket << shift) | n;
348 }
349 }
350
351 static void *rxrpc_peer_seq_next(struct seq_file *seq, void *v, loff_t *_pos)
352 {
353 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
354 unsigned int bucket, n;
355 unsigned int shift = 32 - HASH_BITS(rxnet->peer_hash);
356 void *p;
357
358 if (*_pos >= UINT_MAX)
359 return NULL;
360
361 bucket = *_pos >> shift;
362
363 p = seq_hlist_next_rcu(v, &rxnet->peer_hash[bucket], _pos);
364 if (p)
365 return p;
366
367 for (;;) {
368 bucket++;
369 n = 1;
370 *_pos = (bucket << shift) | n;
371
372 if (bucket >= HASH_SIZE(rxnet->peer_hash)) {
373 *_pos = UINT_MAX;
374 return NULL;
375 }
376 if (n == 0) {
377 *_pos += 1;
378 n++;
379 }
380
381 p = seq_hlist_start_rcu(&rxnet->peer_hash[bucket], n - 1);
382 if (p)
383 return p;
384 }
385 }
386
387 static void rxrpc_peer_seq_stop(struct seq_file *seq, void *v)
388 __releases(rcu)
389 {
390 rcu_read_unlock();
391 }
392
393
394 const struct seq_operations rxrpc_peer_seq_ops = {
395 .start = rxrpc_peer_seq_start,
396 .next = rxrpc_peer_seq_next,
397 .stop = rxrpc_peer_seq_stop,
398 .show = rxrpc_peer_seq_show,
399 };
400
401 /*
402 * Generate a list of extant virtual local endpoints in /proc/net/rxrpc/locals
403 */
404 static int rxrpc_local_seq_show(struct seq_file *seq, void *v)
405 {
406 struct rxrpc_local *local;
407 char lbuff[50];
408
409 if (v == SEQ_START_TOKEN) {
410 seq_puts(seq,
411 "Proto Local "
412 " Use Act RxQ\n");
413 return 0;
414 }
415
416 local = hlist_entry(v, struct rxrpc_local, link);
417
418 sprintf(lbuff, "%pISpc", &local->srx.transport);
419
420 seq_printf(seq,
421 "UDP %-47.47s %3u %3u %3u\n",
422 lbuff,
423 refcount_read(&local->ref),
424 atomic_read(&local->active_users),
425 local->rx_queue.qlen);
426
427 return 0;
428 }
429
430 static void *rxrpc_local_seq_start(struct seq_file *seq, loff_t *_pos)
431 __acquires(rcu)
432 {
433 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
434 unsigned int n;
435
436 rcu_read_lock();
437
438 if (*_pos >= UINT_MAX)
439 return NULL;
440
441 n = *_pos;
442 if (n == 0)
443 return SEQ_START_TOKEN;
444
445 return seq_hlist_start_rcu(&rxnet->local_endpoints, n - 1);
446 }
447
448 static void *rxrpc_local_seq_next(struct seq_file *seq, void *v, loff_t *_pos)
449 {
450 struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
451
452 if (*_pos >= UINT_MAX)
453 return NULL;
454
455 return seq_hlist_next_rcu(v, &rxnet->local_endpoints, _pos);
456 }
457
458 static void rxrpc_local_seq_stop(struct seq_file *seq, void *v)
459 __releases(rcu)
460 {
461 rcu_read_unlock();
462 }
463
464 const struct seq_operations rxrpc_local_seq_ops = {
465 .start = rxrpc_local_seq_start,
466 .next = rxrpc_local_seq_next,
467 .stop = rxrpc_local_seq_stop,
468 .show = rxrpc_local_seq_show,
469 };
470
471 /*
472 * Display stats in /proc/net/rxrpc/stats
473 */
474 int rxrpc_stats_show(struct seq_file *seq, void *v)
475 {
476 struct rxrpc_net *rxnet = rxrpc_net(seq_file_single_net(seq));
477
478 seq_printf(seq,
479 "Data : send=%u sendf=%u fail=%u\n",
480 atomic_read(&rxnet->stat_tx_data_send),
481 atomic_read(&rxnet->stat_tx_data_send_frag),
482 atomic_read(&rxnet->stat_tx_data_send_fail));
483 seq_printf(seq,
484 "Data-Tx : nr=%u retrans=%u uf=%u cwr=%u\n",
485 atomic_read(&rxnet->stat_tx_data),
486 atomic_read(&rxnet->stat_tx_data_retrans),
487 atomic_read(&rxnet->stat_tx_data_underflow),
488 atomic_read(&rxnet->stat_tx_data_cwnd_reset));
489 seq_printf(seq,
490 "Data-Rx : nr=%u reqack=%u jumbo=%u\n",
491 atomic_read(&rxnet->stat_rx_data),
492 atomic_read(&rxnet->stat_rx_data_reqack),
493 atomic_read(&rxnet->stat_rx_data_jumbo));
494 seq_printf(seq,
495 "Ack : fill=%u send=%u skip=%u\n",
496 atomic_read(&rxnet->stat_tx_ack_fill),
497 atomic_read(&rxnet->stat_tx_ack_send),
498 atomic_read(&rxnet->stat_tx_ack_skip));
499 seq_printf(seq,
500 "Ack-Tx : req=%u dup=%u oos=%u exw=%u nos=%u png=%u prs=%u dly=%u idl=%u\n",
501 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_REQUESTED]),
502 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_DUPLICATE]),
503 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_OUT_OF_SEQUENCE]),
504 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_EXCEEDS_WINDOW]),
505 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_NOSPACE]),
506 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_PING]),
507 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_PING_RESPONSE]),
508 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_DELAY]),
509 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_IDLE]));
510 seq_printf(seq,
511 "Ack-Rx : req=%u dup=%u oos=%u exw=%u nos=%u png=%u prs=%u dly=%u idl=%u\n",
512 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_REQUESTED]),
513 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_DUPLICATE]),
514 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_OUT_OF_SEQUENCE]),
515 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_EXCEEDS_WINDOW]),
516 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_NOSPACE]),
517 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_PING]),
518 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_PING_RESPONSE]),
519 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_DELAY]),
520 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_IDLE]));
521 seq_printf(seq,
522 "Why-Req-A: acklost=%u already=%u mrtt=%u ortt=%u\n",
523 atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_ack_lost]),
524 atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_already_on]),
525 atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_more_rtt]),
526 atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_old_rtt]));
527 seq_printf(seq,
528 "Why-Req-A: nolast=%u retx=%u slows=%u smtxw=%u\n",
529 atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_no_srv_last]),
530 atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_retrans]),
531 atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_slow_start]),
532 atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_small_txwin]));
533 seq_printf(seq,
534 "Buffers : txb=%u rxb=%u\n",
535 atomic_read(&rxrpc_nr_txbuf),
536 atomic_read(&rxrpc_n_rx_skbs));
537 seq_printf(seq,
538 "IO-thread: loops=%u\n",
539 atomic_read(&rxnet->stat_io_loop));
540 return 0;
541 }
542
543 /*
544 * Clear stats if /proc/net/rxrpc/stats is written to.
545 */
546 int rxrpc_stats_clear(struct file *file, char *buf, size_t size)
547 {
548 struct seq_file *m = file->private_data;
549 struct rxrpc_net *rxnet = rxrpc_net(seq_file_single_net(m));
550
551 if (size > 1 || (size == 1 && buf[0] != '\n'))
552 return -EINVAL;
553
554 atomic_set(&rxnet->stat_tx_data, 0);
555 atomic_set(&rxnet->stat_tx_data_retrans, 0);
556 atomic_set(&rxnet->stat_tx_data_underflow, 0);
557 atomic_set(&rxnet->stat_tx_data_cwnd_reset, 0);
558 atomic_set(&rxnet->stat_tx_data_send, 0);
559 atomic_set(&rxnet->stat_tx_data_send_frag, 0);
560 atomic_set(&rxnet->stat_tx_data_send_fail, 0);
561 atomic_set(&rxnet->stat_rx_data, 0);
562 atomic_set(&rxnet->stat_rx_data_reqack, 0);
563 atomic_set(&rxnet->stat_rx_data_jumbo, 0);
564
565 atomic_set(&rxnet->stat_tx_ack_fill, 0);
566 atomic_set(&rxnet->stat_tx_ack_send, 0);
567 atomic_set(&rxnet->stat_tx_ack_skip, 0);
568 memset(&rxnet->stat_tx_acks, 0, sizeof(rxnet->stat_tx_acks));
569 memset(&rxnet->stat_rx_acks, 0, sizeof(rxnet->stat_rx_acks));
570
571 memset(&rxnet->stat_why_req_ack, 0, sizeof(rxnet->stat_why_req_ack));
572
573 atomic_set(&rxnet->stat_io_loop, 0);
574 return size;
575 }
576
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