1 /* SCTP kernel implementation 2 * Copyright (c) 2003 International Business Machines, Corp. 3 * 4 * This file is part of the SCTP kernel implementation 5 * 6 * This SCTP implementation is free software; 7 * you can redistribute it and/or modify it under the terms of 8 * the GNU General Public License as published by 9 * the Free Software Foundation; either version 2, or (at your option) 10 * any later version. 11 * 12 * This SCTP implementation is distributed in the hope that it 13 * will be useful, but WITHOUT ANY WARRANTY; without even the implied 14 * ************************ 15 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 16 * See the GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with GNU CC; see the file COPYING. If not, see 20 * <http://www.gnu.org/licenses/>. 21 * 22 * Please send any bug reports or fixes you make to the 23 * email address(es): 24 * lksctp developers <linux-sctp@vger.kernel.org> 25 * 26 * Written or modified by: 27 * Sridhar Samudrala <sri@us.ibm.com> 28 */ 29 30 #include <linux/types.h> 31 #include <linux/seq_file.h> 32 #include <linux/init.h> 33 #include <linux/export.h> 34 #include <net/sctp/sctp.h> 35 #include <net/ip.h> /* for snmp_fold_field */ 36 37 static const struct snmp_mib sctp_snmp_list[] = { 38 SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB), 39 SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS), 40 SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS), 41 SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS), 42 SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS), 43 SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES), 44 SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS), 45 SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS), 46 SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS), 47 SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS), 48 SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS), 49 SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS), 50 SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS), 51 SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS), 52 SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS), 53 SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS), 54 SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS), 55 SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS), 56 SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS), 57 SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS), 58 SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS), 59 SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS), 60 SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS), 61 SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS), 62 SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS), 63 SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS), 64 SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS), 65 SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS), 66 SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ), 67 SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG), 68 SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS), 69 SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS), 70 SNMP_MIB_SENTINEL 71 }; 72 73 /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */ 74 static int sctp_snmp_seq_show(struct seq_file *seq, void *v) 75 { 76 unsigned long buff[SCTP_MIB_MAX]; 77 struct net *net = seq->private; 78 int i; 79 80 memset(buff, 0, sizeof(unsigned long) * SCTP_MIB_MAX); 81 82 snmp_get_cpu_field_batch(buff, sctp_snmp_list, 83 net->sctp.sctp_statistics); 84 for (i = 0; sctp_snmp_list[i].name; i++) 85 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name, 86 buff[i]); 87 88 return 0; 89 } 90 91 /* Initialize the seq file operations for 'snmp' object. */ 92 static int sctp_snmp_seq_open(struct inode *inode, struct file *file) 93 { 94 return single_open_net(inode, file, sctp_snmp_seq_show); 95 } 96 97 static const struct file_operations sctp_snmp_seq_fops = { 98 .owner = THIS_MODULE, 99 .open = sctp_snmp_seq_open, 100 .read = seq_read, 101 .llseek = seq_lseek, 102 .release = single_release_net, 103 }; 104 105 /* Set up the proc fs entry for 'snmp' object. */ 106 int __net_init sctp_snmp_proc_init(struct net *net) 107 { 108 struct proc_dir_entry *p; 109 110 p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp, 111 &sctp_snmp_seq_fops); 112 if (!p) 113 return -ENOMEM; 114 115 return 0; 116 } 117 118 /* Cleanup the proc fs entry for 'snmp' object. */ 119 void sctp_snmp_proc_exit(struct net *net) 120 { 121 remove_proc_entry("snmp", net->sctp.proc_net_sctp); 122 } 123 124 /* Dump local addresses of an association/endpoint. */ 125 static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb) 126 { 127 struct sctp_association *asoc; 128 struct sctp_sockaddr_entry *laddr; 129 struct sctp_transport *peer; 130 union sctp_addr *addr, *primary = NULL; 131 struct sctp_af *af; 132 133 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) { 134 asoc = sctp_assoc(epb); 135 136 peer = asoc->peer.primary_path; 137 if (unlikely(peer == NULL)) { 138 WARN(1, "Association %p with NULL primary path!\n", asoc); 139 return; 140 } 141 142 primary = &peer->saddr; 143 } 144 145 rcu_read_lock(); 146 list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) { 147 if (!laddr->valid) 148 continue; 149 150 addr = &laddr->a; 151 af = sctp_get_af_specific(addr->sa.sa_family); 152 if (primary && af->cmp_addr(addr, primary)) { 153 seq_printf(seq, "*"); 154 } 155 af->seq_dump_addr(seq, addr); 156 } 157 rcu_read_unlock(); 158 } 159 160 /* Dump remote addresses of an association. */ 161 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc) 162 { 163 struct sctp_transport *transport; 164 union sctp_addr *addr, *primary; 165 struct sctp_af *af; 166 167 primary = &assoc->peer.primary_addr; 168 list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list, 169 transports) { 170 addr = &transport->ipaddr; 171 172 af = sctp_get_af_specific(addr->sa.sa_family); 173 if (af->cmp_addr(addr, primary)) { 174 seq_printf(seq, "*"); 175 } 176 af->seq_dump_addr(seq, addr); 177 } 178 } 179 180 static void *sctp_eps_seq_start(struct seq_file *seq, loff_t *pos) 181 { 182 if (*pos >= sctp_ep_hashsize) 183 return NULL; 184 185 if (*pos < 0) 186 *pos = 0; 187 188 if (*pos == 0) 189 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n"); 190 191 return (void *)pos; 192 } 193 194 static void sctp_eps_seq_stop(struct seq_file *seq, void *v) 195 { 196 } 197 198 199 static void *sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos) 200 { 201 if (++*pos >= sctp_ep_hashsize) 202 return NULL; 203 204 return pos; 205 } 206 207 208 /* Display sctp endpoints (/proc/net/sctp/eps). */ 209 static int sctp_eps_seq_show(struct seq_file *seq, void *v) 210 { 211 struct sctp_hashbucket *head; 212 struct sctp_ep_common *epb; 213 struct sctp_endpoint *ep; 214 struct sock *sk; 215 int hash = *(loff_t *)v; 216 217 if (hash >= sctp_ep_hashsize) 218 return -ENOMEM; 219 220 head = &sctp_ep_hashtable[hash]; 221 local_bh_disable(); 222 read_lock(&head->lock); 223 sctp_for_each_hentry(epb, &head->chain) { 224 ep = sctp_ep(epb); 225 sk = epb->sk; 226 if (!net_eq(sock_net(sk), seq_file_net(seq))) 227 continue; 228 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk, 229 sctp_sk(sk)->type, sk->sk_state, hash, 230 epb->bind_addr.port, 231 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), 232 sock_i_ino(sk)); 233 234 sctp_seq_dump_local_addrs(seq, epb); 235 seq_printf(seq, "\n"); 236 } 237 read_unlock(&head->lock); 238 local_bh_enable(); 239 240 return 0; 241 } 242 243 static const struct seq_operations sctp_eps_ops = { 244 .start = sctp_eps_seq_start, 245 .next = sctp_eps_seq_next, 246 .stop = sctp_eps_seq_stop, 247 .show = sctp_eps_seq_show, 248 }; 249 250 251 /* Initialize the seq file operations for 'eps' object. */ 252 static int sctp_eps_seq_open(struct inode *inode, struct file *file) 253 { 254 return seq_open_net(inode, file, &sctp_eps_ops, 255 sizeof(struct seq_net_private)); 256 } 257 258 static const struct file_operations sctp_eps_seq_fops = { 259 .open = sctp_eps_seq_open, 260 .read = seq_read, 261 .llseek = seq_lseek, 262 .release = seq_release_net, 263 }; 264 265 /* Set up the proc fs entry for 'eps' object. */ 266 int __net_init sctp_eps_proc_init(struct net *net) 267 { 268 struct proc_dir_entry *p; 269 270 p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp, 271 &sctp_eps_seq_fops); 272 if (!p) 273 return -ENOMEM; 274 275 return 0; 276 } 277 278 /* Cleanup the proc fs entry for 'eps' object. */ 279 void sctp_eps_proc_exit(struct net *net) 280 { 281 remove_proc_entry("eps", net->sctp.proc_net_sctp); 282 } 283 284 struct sctp_ht_iter { 285 struct seq_net_private p; 286 struct rhashtable_iter hti; 287 int start_fail; 288 }; 289 290 static void *sctp_transport_seq_start(struct seq_file *seq, loff_t *pos) 291 { 292 struct sctp_ht_iter *iter = seq->private; 293 int err = sctp_transport_walk_start(&iter->hti); 294 295 if (err) { 296 iter->start_fail = 1; 297 return ERR_PTR(err); 298 } 299 300 iter->start_fail = 0; 301 return sctp_transport_get_idx(seq_file_net(seq), &iter->hti, *pos); 302 } 303 304 static void sctp_transport_seq_stop(struct seq_file *seq, void *v) 305 { 306 struct sctp_ht_iter *iter = seq->private; 307 308 if (iter->start_fail) 309 return; 310 sctp_transport_walk_stop(&iter->hti); 311 } 312 313 static void *sctp_transport_seq_next(struct seq_file *seq, void *v, loff_t *pos) 314 { 315 struct sctp_ht_iter *iter = seq->private; 316 317 ++*pos; 318 319 return sctp_transport_get_next(seq_file_net(seq), &iter->hti); 320 } 321 322 /* Display sctp associations (/proc/net/sctp/assocs). */ 323 static int sctp_assocs_seq_show(struct seq_file *seq, void *v) 324 { 325 struct sctp_transport *transport; 326 struct sctp_association *assoc; 327 struct sctp_ep_common *epb; 328 struct sock *sk; 329 330 if (v == SEQ_START_TOKEN) { 331 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT " 332 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT " 333 "RPORT LADDRS <-> RADDRS " 334 "HBINT INS OUTS MAXRT T1X T2X RTXC " 335 "wmema wmemq sndbuf rcvbuf\n"); 336 return 0; 337 } 338 339 transport = (struct sctp_transport *)v; 340 if (!sctp_transport_hold(transport)) 341 return 0; 342 assoc = transport->asoc; 343 epb = &assoc->base; 344 sk = epb->sk; 345 346 seq_printf(seq, 347 "%8pK %8pK %-3d %-3d %-2d %-4d " 348 "%4d %8d %8d %7u %5lu %-5d %5d ", 349 assoc, sk, sctp_sk(sk)->type, sk->sk_state, 350 assoc->state, 0, 351 assoc->assoc_id, 352 assoc->sndbuf_used, 353 atomic_read(&assoc->rmem_alloc), 354 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), 355 sock_i_ino(sk), 356 epb->bind_addr.port, 357 assoc->peer.port); 358 seq_printf(seq, " "); 359 sctp_seq_dump_local_addrs(seq, epb); 360 seq_printf(seq, "<-> "); 361 sctp_seq_dump_remote_addrs(seq, assoc); 362 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d " 363 "%8d %8d %8d %8d", 364 assoc->hbinterval, assoc->stream->incnt, 365 assoc->stream->outcnt, assoc->max_retrans, 366 assoc->init_retries, assoc->shutdown_retries, 367 assoc->rtx_data_chunks, 368 atomic_read(&sk->sk_wmem_alloc), 369 sk->sk_wmem_queued, 370 sk->sk_sndbuf, 371 sk->sk_rcvbuf); 372 seq_printf(seq, "\n"); 373 374 sctp_transport_put(transport); 375 376 return 0; 377 } 378 379 static const struct seq_operations sctp_assoc_ops = { 380 .start = sctp_transport_seq_start, 381 .next = sctp_transport_seq_next, 382 .stop = sctp_transport_seq_stop, 383 .show = sctp_assocs_seq_show, 384 }; 385 386 /* Initialize the seq file operations for 'assocs' object. */ 387 static int sctp_assocs_seq_open(struct inode *inode, struct file *file) 388 { 389 return seq_open_net(inode, file, &sctp_assoc_ops, 390 sizeof(struct sctp_ht_iter)); 391 } 392 393 static const struct file_operations sctp_assocs_seq_fops = { 394 .open = sctp_assocs_seq_open, 395 .read = seq_read, 396 .llseek = seq_lseek, 397 .release = seq_release_net, 398 }; 399 400 /* Set up the proc fs entry for 'assocs' object. */ 401 int __net_init sctp_assocs_proc_init(struct net *net) 402 { 403 struct proc_dir_entry *p; 404 405 p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp, 406 &sctp_assocs_seq_fops); 407 if (!p) 408 return -ENOMEM; 409 410 return 0; 411 } 412 413 /* Cleanup the proc fs entry for 'assocs' object. */ 414 void sctp_assocs_proc_exit(struct net *net) 415 { 416 remove_proc_entry("assocs", net->sctp.proc_net_sctp); 417 } 418 419 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v) 420 { 421 struct sctp_association *assoc; 422 struct sctp_transport *transport, *tsp; 423 424 if (v == SEQ_START_TOKEN) { 425 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX " 426 "REM_ADDR_RTX START STATE\n"); 427 return 0; 428 } 429 430 transport = (struct sctp_transport *)v; 431 if (!sctp_transport_hold(transport)) 432 return 0; 433 assoc = transport->asoc; 434 435 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list, 436 transports) { 437 /* 438 * The remote address (ADDR) 439 */ 440 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr); 441 seq_printf(seq, " "); 442 /* 443 * The association ID (ASSOC_ID) 444 */ 445 seq_printf(seq, "%d ", tsp->asoc->assoc_id); 446 447 /* 448 * If the Heartbeat is active (HB_ACT) 449 * Note: 1 = Active, 0 = Inactive 450 */ 451 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer)); 452 453 /* 454 * Retransmit time out (RTO) 455 */ 456 seq_printf(seq, "%lu ", tsp->rto); 457 458 /* 459 * Maximum path retransmit count (PATH_MAX_RTX) 460 */ 461 seq_printf(seq, "%d ", tsp->pathmaxrxt); 462 463 /* 464 * remote address retransmit count (REM_ADDR_RTX) 465 * Note: We don't have a way to tally this at the moment 466 * so lets just leave it as zero for the moment 467 */ 468 seq_puts(seq, "0 "); 469 470 /* 471 * remote address start time (START). This is also not 472 * currently implemented, but we can record it with a 473 * jiffies marker in a subsequent patch 474 */ 475 seq_puts(seq, "0 "); 476 477 /* 478 * The current state of this destination. I.e. 479 * SCTP_ACTIVE, SCTP_INACTIVE, ... 480 */ 481 seq_printf(seq, "%d", tsp->state); 482 483 seq_printf(seq, "\n"); 484 } 485 486 sctp_transport_put(transport); 487 488 return 0; 489 } 490 491 static const struct seq_operations sctp_remaddr_ops = { 492 .start = sctp_transport_seq_start, 493 .next = sctp_transport_seq_next, 494 .stop = sctp_transport_seq_stop, 495 .show = sctp_remaddr_seq_show, 496 }; 497 498 /* Cleanup the proc fs entry for 'remaddr' object. */ 499 void sctp_remaddr_proc_exit(struct net *net) 500 { 501 remove_proc_entry("remaddr", net->sctp.proc_net_sctp); 502 } 503 504 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file) 505 { 506 return seq_open_net(inode, file, &sctp_remaddr_ops, 507 sizeof(struct sctp_ht_iter)); 508 } 509 510 static const struct file_operations sctp_remaddr_seq_fops = { 511 .open = sctp_remaddr_seq_open, 512 .read = seq_read, 513 .llseek = seq_lseek, 514 .release = seq_release_net, 515 }; 516 517 int __net_init sctp_remaddr_proc_init(struct net *net) 518 { 519 struct proc_dir_entry *p; 520 521 p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp, 522 &sctp_remaddr_seq_fops); 523 if (!p) 524 return -ENOMEM; 525 return 0; 526 } 527