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 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(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 = READ_ONCE(call->expect_rx_by); 81 timeout -= jiffies; 82 } 83 84 acks_hard_ack = READ_ONCE(call->acks_hard_ack); 85 seq_printf(seq, 86 "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(&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(seq_file_net(seq)); 121 122 read_lock(&rxnet->conn_lock); 123 return seq_list_start_head(&rxnet->conn_proc_list, *_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(seq_file_net(seq)); 130 131 return seq_list_next(v, &rxnet->conn_proc_list, 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(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(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(seq, 151 "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(lbuff, "no_local"); 162 strcpy(rbuff, "no_connection"); 163 goto print; 164 } 165 166 sprintf(lbuff, "%pISpc", &conn->local->srx.transport); 167 sprintf(rbuff, "%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(seq, 173 "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(&conn->ref), 181 atomic_read(&conn->active), 182 state, 183 key_serial(conn->key), 184 conn->tx_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(seq, 212 "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(lbuff, "%pISpc", &peer->local->srx.transport); 222 223 sprintf(rbuff, "%pISpc", &peer->srx.transport); 224 225 now = ktime_get_seconds(); 226 seq_printf(seq, 227 "UDP %-47.47s %-47.47s %3u" 228 " %3u %5u %6llus %8u %8u\n", 229 lbuff, 230 rbuff, 231 refcount_read(&peer->ref), 232 peer->cong_ssthresh, 233 peer->mtu, 234 now - peer->last_tx_at, 235 peer->srtt_us >> 3, 236 jiffies_to_usecs(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(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(&rxnet->peer_hash[bucket], 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(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, &rxnet->peer_hash[bucket], _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(&rxnet->peer_hash[bucket], 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(seq, 337 "Proto Local " 338 " Use Act RxQ\n"); 339 return 0; 340 } 341 342 local = hlist_entry(v, struct rxrpc_local, link); 343 344 sprintf(lbuff, "%pISpc", &local->srx.transport); 345 346 seq_printf(seq, 347 "UDP %-47.47s %3u %3u %3u\n", 348 lbuff, 349 refcount_read(&local->ref), 350 atomic_read(&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(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(&rxnet->local_endpoints, 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(seq_file_net(seq)); 377 378 if (*_pos >= UINT_MAX) 379 return NULL; 380 381 return seq_hlist_next_rcu(v, &rxnet->local_endpoints, _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(seq_file_single_net(seq)); 403 404 seq_printf(seq, 405 "Data : send=%u sendf=%u fail=%u\n", 406 atomic_read(&rxnet->stat_tx_data_send), 407 atomic_read(&rxnet->stat_tx_data_send_frag), 408 atomic_read(&rxnet->stat_tx_data_send_fail)); 409 seq_printf(seq, 410 "Data-Tx : nr=%u retrans=%u uf=%u cwr=%u\n", 411 atomic_read(&rxnet->stat_tx_data), 412 atomic_read(&rxnet->stat_tx_data_retrans), 413 atomic_read(&rxnet->stat_tx_data_underflow), 414 atomic_read(&rxnet->stat_tx_data_cwnd_reset)); 415 seq_printf(seq, 416 "Data-Rx : nr=%u reqack=%u jumbo=%u\n", 417 atomic_read(&rxnet->stat_rx_data), 418 atomic_read(&rxnet->stat_rx_data_reqack), 419 atomic_read(&rxnet->stat_rx_data_jumbo)); 420 seq_printf(seq, 421 "Ack : fill=%u send=%u skip=%u\n", 422 atomic_read(&rxnet->stat_tx_ack_fill), 423 atomic_read(&rxnet->stat_tx_ack_send), 424 atomic_read(&rxnet->stat_tx_ack_skip)); 425 seq_printf(seq, 426 "Ack-Tx : req=%u dup=%u oos=%u exw=%u nos=%u png=%u prs=%u dly=%u idl=%u\n", 427 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_REQUESTED]), 428 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_DUPLICATE]), 429 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_OUT_OF_SEQUENCE]), 430 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_EXCEEDS_WINDOW]), 431 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_NOSPACE]), 432 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_PING]), 433 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_PING_RESPONSE]), 434 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_DELAY]), 435 atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_IDLE])); 436 seq_printf(seq, 437 "Ack-Rx : req=%u dup=%u oos=%u exw=%u nos=%u png=%u prs=%u dly=%u idl=%u\n", 438 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_REQUESTED]), 439 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_DUPLICATE]), 440 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_OUT_OF_SEQUENCE]), 441 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_EXCEEDS_WINDOW]), 442 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_NOSPACE]), 443 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_PING]), 444 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_PING_RESPONSE]), 445 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_DELAY]), 446 atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_IDLE])); 447 seq_printf(seq, 448 "Why-Req-A: acklost=%u already=%u mrtt=%u ortt=%u\n", 449 atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_ack_lost]), 450 atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_already_on]), 451 atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_more_rtt]), 452 atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_old_rtt])); 453 seq_printf(seq, 454 "Why-Req-A: nolast=%u retx=%u slows=%u smtxw=%u\n", 455 atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_no_srv_last]), 456 atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_retrans]), 457 atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_slow_start]), 458 atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_small_txwin])); 459 seq_printf(seq, 460 "Buffers : txb=%u rxb=%u\n", 461 atomic_read(&rxrpc_nr_txbuf), 462 atomic_read(&rxrpc_n_rx_skbs)); 463 seq_printf(seq, 464 "IO-thread: loops=%u\n", 465 atomic_read(&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(seq_file_single_net(m)); 476 477 if (size > 1 || (size == 1 && buf[0] != '\n')) 478 return -EINVAL; 479 480 atomic_set(&rxnet->stat_tx_data, 0); 481 atomic_set(&rxnet->stat_tx_data_retrans, 0); 482 atomic_set(&rxnet->stat_tx_data_underflow, 0); 483 atomic_set(&rxnet->stat_tx_data_cwnd_reset, 0); 484 atomic_set(&rxnet->stat_tx_data_send, 0); 485 atomic_set(&rxnet->stat_tx_data_send_frag, 0); 486 atomic_set(&rxnet->stat_tx_data_send_fail, 0); 487 atomic_set(&rxnet->stat_rx_data, 0); 488 atomic_set(&rxnet->stat_rx_data_reqack, 0); 489 atomic_set(&rxnet->stat_rx_data_jumbo, 0); 490 491 atomic_set(&rxnet->stat_tx_ack_fill, 0); 492 atomic_set(&rxnet->stat_tx_ack_send, 0); 493 atomic_set(&rxnet->stat_tx_ack_skip, 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(&rxnet->stat_io_loop, 0); 500 return size; 501} 502