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
13static 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 */
27static void *rxrpc_call_seq_start(struct seq_file *seq, loff_t *_pos)
28 __acquires(rcu)
29{
30 struct rxrpc_net *rxnet = rxrpc_net(net: seq_file_net(seq));
31
32 rcu_read_lock();
33 return seq_list_start_head_rcu(head: &rxnet->calls, pos: *_pos);
34}
35
36static void *rxrpc_call_seq_next(struct seq_file *seq, void *v, loff_t *pos)
37{
38 struct rxrpc_net *rxnet = rxrpc_net(net: seq_file_net(seq));
39
40 return seq_list_next_rcu(v, head: &rxnet->calls, ppos: pos);
41}
42
43static void rxrpc_call_seq_stop(struct seq_file *seq, void *v)
44 __releases(rcu)
45{
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_call *call;
53 struct rxrpc_net *rxnet = rxrpc_net(net: seq_file_net(seq));
54 enum rxrpc_call_state state;
55 unsigned long timeout = 0;
56 rxrpc_seq_t acks_hard_ack;
57 char lbuff[50], rbuff[50];
58
59 if (v == &rxnet->calls) {
60 seq_puts(m: seq,
61 s: "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(buf: lbuff, fmt: "%pISpc", &local->srx.transport);
73 else
74 strcpy(p: lbuff, q: "no_local");
75
76 sprintf(buf: rbuff, fmt: "%pISpc", &call->dest_srx.transport);
77
78 state = rxrpc_call_state(call);
79 if (state != RXRPC_CALL_SERVER_PREALLOC) {
80 timeout = READ_ONCE(call->expect_rx_by);
81 timeout -= jiffies;
82 }
83
84 acks_hard_ack = READ_ONCE(call->acks_hard_ack);
85 seq_printf(m: seq,
86 fmt: "UDP %-47.47s %-47.47s %4x %08x %08x %s %3u"
87 " %-8.8s %08x %08x %08x %02x %08x %02x %08x %02x %06lx\n",
88 lbuff,
89 rbuff,
90 call->dest_srx.srx_service,
91 call->cid,
92 call->call_id,
93 rxrpc_is_service_call(call) ? "Svc" : "Clt",
94 refcount_read(r: &call->ref),
95 rxrpc_call_states[state],
96 call->abort_code,
97 call->debug_id,
98 acks_hard_ack, READ_ONCE(call->tx_top) - acks_hard_ack,
99 call->ackr_window, call->ackr_wtop - call->ackr_window,
100 call->rx_serial,
101 call->cong_cwnd,
102 timeout);
103
104 return 0;
105}
106
107const struct seq_operations rxrpc_call_seq_ops = {
108 .start = rxrpc_call_seq_start,
109 .next = rxrpc_call_seq_next,
110 .stop = rxrpc_call_seq_stop,
111 .show = rxrpc_call_seq_show,
112};
113
114/*
115 * generate a list of extant virtual connections in /proc/net/rxrpc_conns
116 */
117static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
118 __acquires(rxnet->conn_lock)
119{
120 struct rxrpc_net *rxnet = rxrpc_net(net: seq_file_net(seq));
121
122 read_lock(&rxnet->conn_lock);
123 return seq_list_start_head(head: &rxnet->conn_proc_list, pos: *_pos);
124}
125
126static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
127 loff_t *pos)
128{
129 struct rxrpc_net *rxnet = rxrpc_net(net: seq_file_net(seq));
130
131 return seq_list_next(v, head: &rxnet->conn_proc_list, ppos: pos);
132}
133
134static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
135 __releases(rxnet->conn_lock)
136{
137 struct rxrpc_net *rxnet = rxrpc_net(net: seq_file_net(seq));
138
139 read_unlock(&rxnet->conn_lock);
140}
141
142static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
143{
144 struct rxrpc_connection *conn;
145 struct rxrpc_net *rxnet = rxrpc_net(net: seq_file_net(seq));
146 const char *state;
147 char lbuff[50], rbuff[50];
148
149 if (v == &rxnet->conn_proc_list) {
150 seq_puts(m: seq,
151 s: "Proto Local "
152 " Remote "
153 " SvID ConnID End Ref Act State Key "
154 " Serial ISerial CallId0 CallId1 CallId2 CallId3\n"
155 );
156 return 0;
157 }
158
159 conn = list_entry(v, struct rxrpc_connection, proc_link);
160 if (conn->state == RXRPC_CONN_SERVICE_PREALLOC) {
161 strcpy(p: lbuff, q: "no_local");
162 strcpy(p: rbuff, q: "no_connection");
163 goto print;
164 }
165
166 sprintf(buf: lbuff, fmt: "%pISpc", &conn->local->srx.transport);
167 sprintf(buf: rbuff, fmt: "%pISpc", &conn->peer->srx.transport);
168print:
169 state = rxrpc_is_conn_aborted(conn) ?
170 rxrpc_call_completions[conn->completion] :
171 rxrpc_conn_states[conn->state];
172 seq_printf(m: seq,
173 fmt: "UDP %-47.47s %-47.47s %4x %08x %s %3u %3d"
174 " %s %08x %08x %08x %08x %08x %08x %08x\n",
175 lbuff,
176 rbuff,
177 conn->service_id,
178 conn->proto.cid,
179 rxrpc_conn_is_service(conn) ? "Svc" : "Clt",
180 refcount_read(r: &conn->ref),
181 atomic_read(v: &conn->active),
182 state,
183 key_serial(key: conn->key),
184 atomic_read(v: &conn->serial),
185 conn->hi_serial,
186 conn->channels[0].call_id,
187 conn->channels[1].call_id,
188 conn->channels[2].call_id,
189 conn->channels[3].call_id);
190
191 return 0;
192}
193
194const struct seq_operations rxrpc_connection_seq_ops = {
195 .start = rxrpc_connection_seq_start,
196 .next = rxrpc_connection_seq_next,
197 .stop = rxrpc_connection_seq_stop,
198 .show = rxrpc_connection_seq_show,
199};
200
201/*
202 * generate a list of extant virtual peers in /proc/net/rxrpc/peers
203 */
204static int rxrpc_peer_seq_show(struct seq_file *seq, void *v)
205{
206 struct rxrpc_peer *peer;
207 time64_t now;
208 char lbuff[50], rbuff[50];
209
210 if (v == SEQ_START_TOKEN) {
211 seq_puts(m: seq,
212 s: "Proto Local "
213 " Remote "
214 " Use SST MTU LastUse RTT RTO\n"
215 );
216 return 0;
217 }
218
219 peer = list_entry(v, struct rxrpc_peer, hash_link);
220
221 sprintf(buf: lbuff, fmt: "%pISpc", &peer->local->srx.transport);
222
223 sprintf(buf: rbuff, fmt: "%pISpc", &peer->srx.transport);
224
225 now = ktime_get_seconds();
226 seq_printf(m: seq,
227 fmt: "UDP %-47.47s %-47.47s %3u"
228 " %3u %5u %6llus %8u %8u\n",
229 lbuff,
230 rbuff,
231 refcount_read(r: &peer->ref),
232 peer->cong_ssthresh,
233 peer->mtu,
234 now - peer->last_tx_at,
235 peer->srtt_us >> 3,
236 jiffies_to_usecs(j: peer->rto_j));
237
238 return 0;
239}
240
241static void *rxrpc_peer_seq_start(struct seq_file *seq, loff_t *_pos)
242 __acquires(rcu)
243{
244 struct rxrpc_net *rxnet = rxrpc_net(net: seq_file_net(seq));
245 unsigned int bucket, n;
246 unsigned int shift = 32 - HASH_BITS(rxnet->peer_hash);
247 void *p;
248
249 rcu_read_lock();
250
251 if (*_pos >= UINT_MAX)
252 return NULL;
253
254 n = *_pos & ((1U << shift) - 1);
255 bucket = *_pos >> shift;
256 for (;;) {
257 if (bucket >= HASH_SIZE(rxnet->peer_hash)) {
258 *_pos = UINT_MAX;
259 return NULL;
260 }
261 if (n == 0) {
262 if (bucket == 0)
263 return SEQ_START_TOKEN;
264 *_pos += 1;
265 n++;
266 }
267
268 p = seq_hlist_start_rcu(head: &rxnet->peer_hash[bucket], pos: n - 1);
269 if (p)
270 return p;
271 bucket++;
272 n = 1;
273 *_pos = (bucket << shift) | n;
274 }
275}
276
277static void *rxrpc_peer_seq_next(struct seq_file *seq, void *v, loff_t *_pos)
278{
279 struct rxrpc_net *rxnet = rxrpc_net(net: seq_file_net(seq));
280 unsigned int bucket, n;
281 unsigned int shift = 32 - HASH_BITS(rxnet->peer_hash);
282 void *p;
283
284 if (*_pos >= UINT_MAX)
285 return NULL;
286
287 bucket = *_pos >> shift;
288
289 p = seq_hlist_next_rcu(v, head: &rxnet->peer_hash[bucket], ppos: _pos);
290 if (p)
291 return p;
292
293 for (;;) {
294 bucket++;
295 n = 1;
296 *_pos = (bucket << shift) | n;
297
298 if (bucket >= HASH_SIZE(rxnet->peer_hash)) {
299 *_pos = UINT_MAX;
300 return NULL;
301 }
302 if (n == 0) {
303 *_pos += 1;
304 n++;
305 }
306
307 p = seq_hlist_start_rcu(head: &rxnet->peer_hash[bucket], pos: n - 1);
308 if (p)
309 return p;
310 }
311}
312
313static void rxrpc_peer_seq_stop(struct seq_file *seq, void *v)
314 __releases(rcu)
315{
316 rcu_read_unlock();
317}
318
319
320const struct seq_operations rxrpc_peer_seq_ops = {
321 .start = rxrpc_peer_seq_start,
322 .next = rxrpc_peer_seq_next,
323 .stop = rxrpc_peer_seq_stop,
324 .show = rxrpc_peer_seq_show,
325};
326
327/*
328 * Generate a list of extant virtual local endpoints in /proc/net/rxrpc/locals
329 */
330static int rxrpc_local_seq_show(struct seq_file *seq, void *v)
331{
332 struct rxrpc_local *local;
333 char lbuff[50];
334
335 if (v == SEQ_START_TOKEN) {
336 seq_puts(m: seq,
337 s: "Proto Local "
338 " Use Act RxQ\n");
339 return 0;
340 }
341
342 local = hlist_entry(v, struct rxrpc_local, link);
343
344 sprintf(buf: lbuff, fmt: "%pISpc", &local->srx.transport);
345
346 seq_printf(m: seq,
347 fmt: "UDP %-47.47s %3u %3u %3u\n",
348 lbuff,
349 refcount_read(r: &local->ref),
350 atomic_read(v: &local->active_users),
351 local->rx_queue.qlen);
352
353 return 0;
354}
355
356static void *rxrpc_local_seq_start(struct seq_file *seq, loff_t *_pos)
357 __acquires(rcu)
358{
359 struct rxrpc_net *rxnet = rxrpc_net(net: seq_file_net(seq));
360 unsigned int n;
361
362 rcu_read_lock();
363
364 if (*_pos >= UINT_MAX)
365 return NULL;
366
367 n = *_pos;
368 if (n == 0)
369 return SEQ_START_TOKEN;
370
371 return seq_hlist_start_rcu(head: &rxnet->local_endpoints, pos: n - 1);
372}
373
374static void *rxrpc_local_seq_next(struct seq_file *seq, void *v, loff_t *_pos)
375{
376 struct rxrpc_net *rxnet = rxrpc_net(net: seq_file_net(seq));
377
378 if (*_pos >= UINT_MAX)
379 return NULL;
380
381 return seq_hlist_next_rcu(v, head: &rxnet->local_endpoints, ppos: _pos);
382}
383
384static void rxrpc_local_seq_stop(struct seq_file *seq, void *v)
385 __releases(rcu)
386{
387 rcu_read_unlock();
388}
389
390const struct seq_operations rxrpc_local_seq_ops = {
391 .start = rxrpc_local_seq_start,
392 .next = rxrpc_local_seq_next,
393 .stop = rxrpc_local_seq_stop,
394 .show = rxrpc_local_seq_show,
395};
396
397/*
398 * Display stats in /proc/net/rxrpc/stats
399 */
400int rxrpc_stats_show(struct seq_file *seq, void *v)
401{
402 struct rxrpc_net *rxnet = rxrpc_net(net: seq_file_single_net(seq));
403
404 seq_printf(m: seq,
405 fmt: "Data : send=%u sendf=%u fail=%u\n",
406 atomic_read(v: &rxnet->stat_tx_data_send),
407 atomic_read(v: &rxnet->stat_tx_data_send_frag),
408 atomic_read(v: &rxnet->stat_tx_data_send_fail));
409 seq_printf(m: seq,
410 fmt: "Data-Tx : nr=%u retrans=%u uf=%u cwr=%u\n",
411 atomic_read(v: &rxnet->stat_tx_data),
412 atomic_read(v: &rxnet->stat_tx_data_retrans),
413 atomic_read(v: &rxnet->stat_tx_data_underflow),
414 atomic_read(v: &rxnet->stat_tx_data_cwnd_reset));
415 seq_printf(m: seq,
416 fmt: "Data-Rx : nr=%u reqack=%u jumbo=%u\n",
417 atomic_read(v: &rxnet->stat_rx_data),
418 atomic_read(v: &rxnet->stat_rx_data_reqack),
419 atomic_read(v: &rxnet->stat_rx_data_jumbo));
420 seq_printf(m: seq,
421 fmt: "Ack : fill=%u send=%u skip=%u\n",
422 atomic_read(v: &rxnet->stat_tx_ack_fill),
423 atomic_read(v: &rxnet->stat_tx_ack_send),
424 atomic_read(v: &rxnet->stat_tx_ack_skip));
425 seq_printf(m: seq,
426 fmt: "Ack-Tx : req=%u dup=%u oos=%u exw=%u nos=%u png=%u prs=%u dly=%u idl=%u\n",
427 atomic_read(v: &rxnet->stat_tx_acks[RXRPC_ACK_REQUESTED]),
428 atomic_read(v: &rxnet->stat_tx_acks[RXRPC_ACK_DUPLICATE]),
429 atomic_read(v: &rxnet->stat_tx_acks[RXRPC_ACK_OUT_OF_SEQUENCE]),
430 atomic_read(v: &rxnet->stat_tx_acks[RXRPC_ACK_EXCEEDS_WINDOW]),
431 atomic_read(v: &rxnet->stat_tx_acks[RXRPC_ACK_NOSPACE]),
432 atomic_read(v: &rxnet->stat_tx_acks[RXRPC_ACK_PING]),
433 atomic_read(v: &rxnet->stat_tx_acks[RXRPC_ACK_PING_RESPONSE]),
434 atomic_read(v: &rxnet->stat_tx_acks[RXRPC_ACK_DELAY]),
435 atomic_read(v: &rxnet->stat_tx_acks[RXRPC_ACK_IDLE]));
436 seq_printf(m: seq,
437 fmt: "Ack-Rx : req=%u dup=%u oos=%u exw=%u nos=%u png=%u prs=%u dly=%u idl=%u\n",
438 atomic_read(v: &rxnet->stat_rx_acks[RXRPC_ACK_REQUESTED]),
439 atomic_read(v: &rxnet->stat_rx_acks[RXRPC_ACK_DUPLICATE]),
440 atomic_read(v: &rxnet->stat_rx_acks[RXRPC_ACK_OUT_OF_SEQUENCE]),
441 atomic_read(v: &rxnet->stat_rx_acks[RXRPC_ACK_EXCEEDS_WINDOW]),
442 atomic_read(v: &rxnet->stat_rx_acks[RXRPC_ACK_NOSPACE]),
443 atomic_read(v: &rxnet->stat_rx_acks[RXRPC_ACK_PING]),
444 atomic_read(v: &rxnet->stat_rx_acks[RXRPC_ACK_PING_RESPONSE]),
445 atomic_read(v: &rxnet->stat_rx_acks[RXRPC_ACK_DELAY]),
446 atomic_read(v: &rxnet->stat_rx_acks[RXRPC_ACK_IDLE]));
447 seq_printf(m: seq,
448 fmt: "Why-Req-A: acklost=%u already=%u mrtt=%u ortt=%u\n",
449 atomic_read(v: &rxnet->stat_why_req_ack[rxrpc_reqack_ack_lost]),
450 atomic_read(v: &rxnet->stat_why_req_ack[rxrpc_reqack_already_on]),
451 atomic_read(v: &rxnet->stat_why_req_ack[rxrpc_reqack_more_rtt]),
452 atomic_read(v: &rxnet->stat_why_req_ack[rxrpc_reqack_old_rtt]));
453 seq_printf(m: seq,
454 fmt: "Why-Req-A: nolast=%u retx=%u slows=%u smtxw=%u\n",
455 atomic_read(v: &rxnet->stat_why_req_ack[rxrpc_reqack_no_srv_last]),
456 atomic_read(v: &rxnet->stat_why_req_ack[rxrpc_reqack_retrans]),
457 atomic_read(v: &rxnet->stat_why_req_ack[rxrpc_reqack_slow_start]),
458 atomic_read(v: &rxnet->stat_why_req_ack[rxrpc_reqack_small_txwin]));
459 seq_printf(m: seq,
460 fmt: "Buffers : txb=%u rxb=%u\n",
461 atomic_read(v: &rxrpc_nr_txbuf),
462 atomic_read(v: &rxrpc_n_rx_skbs));
463 seq_printf(m: seq,
464 fmt: "IO-thread: loops=%u\n",
465 atomic_read(v: &rxnet->stat_io_loop));
466 return 0;
467}
468
469/*
470 * Clear stats if /proc/net/rxrpc/stats is written to.
471 */
472int rxrpc_stats_clear(struct file *file, char *buf, size_t size)
473{
474 struct seq_file *m = file->private_data;
475 struct rxrpc_net *rxnet = rxrpc_net(net: seq_file_single_net(seq: m));
476
477 if (size > 1 || (size == 1 && buf[0] != '\n'))
478 return -EINVAL;
479
480 atomic_set(v: &rxnet->stat_tx_data, i: 0);
481 atomic_set(v: &rxnet->stat_tx_data_retrans, i: 0);
482 atomic_set(v: &rxnet->stat_tx_data_underflow, i: 0);
483 atomic_set(v: &rxnet->stat_tx_data_cwnd_reset, i: 0);
484 atomic_set(v: &rxnet->stat_tx_data_send, i: 0);
485 atomic_set(v: &rxnet->stat_tx_data_send_frag, i: 0);
486 atomic_set(v: &rxnet->stat_tx_data_send_fail, i: 0);
487 atomic_set(v: &rxnet->stat_rx_data, i: 0);
488 atomic_set(v: &rxnet->stat_rx_data_reqack, i: 0);
489 atomic_set(v: &rxnet->stat_rx_data_jumbo, i: 0);
490
491 atomic_set(v: &rxnet->stat_tx_ack_fill, i: 0);
492 atomic_set(v: &rxnet->stat_tx_ack_send, i: 0);
493 atomic_set(v: &rxnet->stat_tx_ack_skip, i: 0);
494 memset(&rxnet->stat_tx_acks, 0, sizeof(rxnet->stat_tx_acks));
495 memset(&rxnet->stat_rx_acks, 0, sizeof(rxnet->stat_rx_acks));
496
497 memset(&rxnet->stat_why_req_ack, 0, sizeof(rxnet->stat_why_req_ack));
498
499 atomic_set(v: &rxnet->stat_io_loop, i: 0);
500 return size;
501}
502

source code of linux/net/rxrpc/proc.c