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(seq_file_net(seq)); 31 32 rcu_read_lock(); 33 return seq_list_start_head_rcu(&rxnet->calls, *_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(seq_file_net(seq)); 39 40 return seq_list_next_rcu(v, &rxnet->calls, 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(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 105const 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 */ 115static 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 124static 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 132static 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 140static 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); 166print: 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 192const 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 */ 202static 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 211static 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 219static 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 227static 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 268const 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 */ 278static 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 315static 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 351static 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 387static void rxrpc_peer_seq_stop(struct seq_file *seq, void *v) 388 __releases(rcu) 389{ 390 rcu_read_unlock(); 391} 392 393 394const 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 */ 404static 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 430static 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 448static 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 458static void rxrpc_local_seq_stop(struct seq_file *seq, void *v) 459 __releases(rcu) 460{ 461 rcu_read_unlock(); 462} 463 464const 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 */ 474int 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 */ 546int 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