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, write to 20 * the Free Software Foundation, 59 Temple Place - Suite 330, 21 * Boston, MA 02111-1307, USA. 22 * 23 * Please send any bug reports or fixes you make to the 24 * email address(es): 25 * lksctp developers <lksctp-developers@lists.sourceforge.net> 26 * 27 * Or submit a bug report through the following website: 28 * http://www.sf.net/projects/lksctp 29 * 30 * Written or modified by: 31 * Sridhar Samudrala <sri@us.ibm.com> 32 * 33 * Any bugs reported given to us we will try to fix... any fixes shared will 34 * be incorporated into the next SCTP release. 35 */ 36 37 #include <linux/types.h> 38 #include <linux/seq_file.h> 39 #include <linux/init.h> 40 #include <linux/export.h> 41 #include <net/sctp/sctp.h> 42 #include <net/ip.h> /* for snmp_fold_field */ 43 44 static const struct snmp_mib sctp_snmp_list[] = { 45 SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB), 46 SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS), 47 SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS), 48 SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS), 49 SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS), 50 SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES), 51 SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS), 52 SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS), 53 SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS), 54 SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS), 55 SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS), 56 SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS), 57 SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS), 58 SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS), 59 SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS), 60 SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS), 61 SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS), 62 SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS), 63 SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS), 64 SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS), 65 SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS), 66 SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS), 67 SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS), 68 SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS), 69 SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS), 70 SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS), 71 SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS), 72 SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS), 73 SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ), 74 SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG), 75 SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS), 76 SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS), 77 SNMP_MIB_SENTINEL 78 }; 79 80 /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */ 81 static int sctp_snmp_seq_show(struct seq_file *seq, void *v) 82 { 83 struct net *net = seq->private; 84 int i; 85 86 for (i = 0; sctp_snmp_list[i].name != NULL; i++) 87 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name, 88 snmp_fold_field((void __percpu **)net->sctp.sctp_statistics, 89 sctp_snmp_list[i].entry)); 90 91 return 0; 92 } 93 94 /* Initialize the seq file operations for 'snmp' object. */ 95 static int sctp_snmp_seq_open(struct inode *inode, struct file *file) 96 { 97 return single_open_net(inode, file, sctp_snmp_seq_show); 98 } 99 100 static const struct file_operations sctp_snmp_seq_fops = { 101 .owner = THIS_MODULE, 102 .open = sctp_snmp_seq_open, 103 .read = seq_read, 104 .llseek = seq_lseek, 105 .release = single_release_net, 106 }; 107 108 /* Set up the proc fs entry for 'snmp' object. */ 109 int __net_init sctp_snmp_proc_init(struct net *net) 110 { 111 struct proc_dir_entry *p; 112 113 p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp, 114 &sctp_snmp_seq_fops); 115 if (!p) 116 return -ENOMEM; 117 118 return 0; 119 } 120 121 /* Cleanup the proc fs entry for 'snmp' object. */ 122 void sctp_snmp_proc_exit(struct net *net) 123 { 124 remove_proc_entry("snmp", net->sctp.proc_net_sctp); 125 } 126 127 /* Dump local addresses of an association/endpoint. */ 128 static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb) 129 { 130 struct sctp_association *asoc; 131 struct sctp_sockaddr_entry *laddr; 132 struct sctp_transport *peer; 133 union sctp_addr *addr, *primary = NULL; 134 struct sctp_af *af; 135 136 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) { 137 asoc = sctp_assoc(epb); 138 139 peer = asoc->peer.primary_path; 140 if (unlikely(peer == NULL)) { 141 WARN(1, "Association %p with NULL primary path!\n", asoc); 142 return; 143 } 144 145 primary = &peer->saddr; 146 } 147 148 rcu_read_lock(); 149 list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) { 150 if (!laddr->valid) 151 continue; 152 153 addr = &laddr->a; 154 af = sctp_get_af_specific(addr->sa.sa_family); 155 if (primary && af->cmp_addr(addr, primary)) { 156 seq_printf(seq, "*"); 157 } 158 af->seq_dump_addr(seq, addr); 159 } 160 rcu_read_unlock(); 161 } 162 163 /* Dump remote addresses of an association. */ 164 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc) 165 { 166 struct sctp_transport *transport; 167 union sctp_addr *addr, *primary; 168 struct sctp_af *af; 169 170 primary = &assoc->peer.primary_addr; 171 rcu_read_lock(); 172 list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list, 173 transports) { 174 addr = &transport->ipaddr; 175 if (transport->dead) 176 continue; 177 178 af = sctp_get_af_specific(addr->sa.sa_family); 179 if (af->cmp_addr(addr, primary)) { 180 seq_printf(seq, "*"); 181 } 182 af->seq_dump_addr(seq, addr); 183 } 184 rcu_read_unlock(); 185 } 186 187 static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos) 188 { 189 if (*pos >= sctp_ep_hashsize) 190 return NULL; 191 192 if (*pos < 0) 193 *pos = 0; 194 195 if (*pos == 0) 196 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n"); 197 198 return (void *)pos; 199 } 200 201 static void sctp_eps_seq_stop(struct seq_file *seq, void *v) 202 { 203 } 204 205 206 static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos) 207 { 208 if (++*pos >= sctp_ep_hashsize) 209 return NULL; 210 211 return pos; 212 } 213 214 215 /* Display sctp endpoints (/proc/net/sctp/eps). */ 216 static int sctp_eps_seq_show(struct seq_file *seq, void *v) 217 { 218 struct sctp_hashbucket *head; 219 struct sctp_ep_common *epb; 220 struct sctp_endpoint *ep; 221 struct sock *sk; 222 int hash = *(loff_t *)v; 223 224 if (hash >= sctp_ep_hashsize) 225 return -ENOMEM; 226 227 head = &sctp_ep_hashtable[hash]; 228 sctp_local_bh_disable(); 229 read_lock(&head->lock); 230 sctp_for_each_hentry(epb, &head->chain) { 231 ep = sctp_ep(epb); 232 sk = epb->sk; 233 if (!net_eq(sock_net(sk), seq_file_net(seq))) 234 continue; 235 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk, 236 sctp_sk(sk)->type, sk->sk_state, hash, 237 epb->bind_addr.port, 238 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), 239 sock_i_ino(sk)); 240 241 sctp_seq_dump_local_addrs(seq, epb); 242 seq_printf(seq, "\n"); 243 } 244 read_unlock(&head->lock); 245 sctp_local_bh_enable(); 246 247 return 0; 248 } 249 250 static const struct seq_operations sctp_eps_ops = { 251 .start = sctp_eps_seq_start, 252 .next = sctp_eps_seq_next, 253 .stop = sctp_eps_seq_stop, 254 .show = sctp_eps_seq_show, 255 }; 256 257 258 /* Initialize the seq file operations for 'eps' object. */ 259 static int sctp_eps_seq_open(struct inode *inode, struct file *file) 260 { 261 return seq_open_net(inode, file, &sctp_eps_ops, 262 sizeof(struct seq_net_private)); 263 } 264 265 static const struct file_operations sctp_eps_seq_fops = { 266 .open = sctp_eps_seq_open, 267 .read = seq_read, 268 .llseek = seq_lseek, 269 .release = seq_release_net, 270 }; 271 272 /* Set up the proc fs entry for 'eps' object. */ 273 int __net_init sctp_eps_proc_init(struct net *net) 274 { 275 struct proc_dir_entry *p; 276 277 p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp, 278 &sctp_eps_seq_fops); 279 if (!p) 280 return -ENOMEM; 281 282 return 0; 283 } 284 285 /* Cleanup the proc fs entry for 'eps' object. */ 286 void sctp_eps_proc_exit(struct net *net) 287 { 288 remove_proc_entry("eps", net->sctp.proc_net_sctp); 289 } 290 291 292 static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos) 293 { 294 if (*pos >= sctp_assoc_hashsize) 295 return NULL; 296 297 if (*pos < 0) 298 *pos = 0; 299 300 if (*pos == 0) 301 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT " 302 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT " 303 "RPORT LADDRS <-> RADDRS " 304 "HBINT INS OUTS MAXRT T1X T2X RTXC " 305 "wmema wmemq sndbuf rcvbuf\n"); 306 307 return (void *)pos; 308 } 309 310 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v) 311 { 312 } 313 314 315 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos) 316 { 317 if (++*pos >= sctp_assoc_hashsize) 318 return NULL; 319 320 return pos; 321 } 322 323 /* Display sctp associations (/proc/net/sctp/assocs). */ 324 static int sctp_assocs_seq_show(struct seq_file *seq, void *v) 325 { 326 struct sctp_hashbucket *head; 327 struct sctp_ep_common *epb; 328 struct sctp_association *assoc; 329 struct sock *sk; 330 int hash = *(loff_t *)v; 331 332 if (hash >= sctp_assoc_hashsize) 333 return -ENOMEM; 334 335 head = &sctp_assoc_hashtable[hash]; 336 sctp_local_bh_disable(); 337 read_lock(&head->lock); 338 sctp_for_each_hentry(epb, &head->chain) { 339 assoc = sctp_assoc(epb); 340 sk = epb->sk; 341 if (!net_eq(sock_net(sk), seq_file_net(seq))) 342 continue; 343 seq_printf(seq, 344 "%8pK %8pK %-3d %-3d %-2d %-4d " 345 "%4d %8d %8d %7d %5lu %-5d %5d ", 346 assoc, sk, sctp_sk(sk)->type, sk->sk_state, 347 assoc->state, hash, 348 assoc->assoc_id, 349 assoc->sndbuf_used, 350 atomic_read(&assoc->rmem_alloc), 351 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), 352 sock_i_ino(sk), 353 epb->bind_addr.port, 354 assoc->peer.port); 355 seq_printf(seq, " "); 356 sctp_seq_dump_local_addrs(seq, epb); 357 seq_printf(seq, "<-> "); 358 sctp_seq_dump_remote_addrs(seq, assoc); 359 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d " 360 "%8d %8d %8d %8d", 361 assoc->hbinterval, assoc->c.sinit_max_instreams, 362 assoc->c.sinit_num_ostreams, assoc->max_retrans, 363 assoc->init_retries, assoc->shutdown_retries, 364 assoc->rtx_data_chunks, 365 atomic_read(&sk->sk_wmem_alloc), 366 sk->sk_wmem_queued, 367 sk->sk_sndbuf, 368 sk->sk_rcvbuf); 369 seq_printf(seq, "\n"); 370 } 371 read_unlock(&head->lock); 372 sctp_local_bh_enable(); 373 374 return 0; 375 } 376 377 static const struct seq_operations sctp_assoc_ops = { 378 .start = sctp_assocs_seq_start, 379 .next = sctp_assocs_seq_next, 380 .stop = sctp_assocs_seq_stop, 381 .show = sctp_assocs_seq_show, 382 }; 383 384 /* Initialize the seq file operations for 'assocs' object. */ 385 static int sctp_assocs_seq_open(struct inode *inode, struct file *file) 386 { 387 return seq_open_net(inode, file, &sctp_assoc_ops, 388 sizeof(struct seq_net_private)); 389 } 390 391 static const struct file_operations sctp_assocs_seq_fops = { 392 .open = sctp_assocs_seq_open, 393 .read = seq_read, 394 .llseek = seq_lseek, 395 .release = seq_release_net, 396 }; 397 398 /* Set up the proc fs entry for 'assocs' object. */ 399 int __net_init sctp_assocs_proc_init(struct net *net) 400 { 401 struct proc_dir_entry *p; 402 403 p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp, 404 &sctp_assocs_seq_fops); 405 if (!p) 406 return -ENOMEM; 407 408 return 0; 409 } 410 411 /* Cleanup the proc fs entry for 'assocs' object. */ 412 void sctp_assocs_proc_exit(struct net *net) 413 { 414 remove_proc_entry("assocs", net->sctp.proc_net_sctp); 415 } 416 417 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos) 418 { 419 if (*pos >= sctp_assoc_hashsize) 420 return NULL; 421 422 if (*pos < 0) 423 *pos = 0; 424 425 if (*pos == 0) 426 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX " 427 "REM_ADDR_RTX START\n"); 428 429 return (void *)pos; 430 } 431 432 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos) 433 { 434 if (++*pos >= sctp_assoc_hashsize) 435 return NULL; 436 437 return pos; 438 } 439 440 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v) 441 { 442 } 443 444 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v) 445 { 446 struct sctp_hashbucket *head; 447 struct sctp_ep_common *epb; 448 struct sctp_association *assoc; 449 struct sctp_transport *tsp; 450 int hash = *(loff_t *)v; 451 452 if (hash >= sctp_assoc_hashsize) 453 return -ENOMEM; 454 455 head = &sctp_assoc_hashtable[hash]; 456 sctp_local_bh_disable(); 457 read_lock(&head->lock); 458 rcu_read_lock(); 459 sctp_for_each_hentry(epb, &head->chain) { 460 if (!net_eq(sock_net(epb->sk), seq_file_net(seq))) 461 continue; 462 assoc = sctp_assoc(epb); 463 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list, 464 transports) { 465 if (tsp->dead) 466 continue; 467 468 /* 469 * The remote address (ADDR) 470 */ 471 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr); 472 seq_printf(seq, " "); 473 474 /* 475 * The association ID (ASSOC_ID) 476 */ 477 seq_printf(seq, "%d ", tsp->asoc->assoc_id); 478 479 /* 480 * If the Heartbeat is active (HB_ACT) 481 * Note: 1 = Active, 0 = Inactive 482 */ 483 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer)); 484 485 /* 486 * Retransmit time out (RTO) 487 */ 488 seq_printf(seq, "%lu ", tsp->rto); 489 490 /* 491 * Maximum path retransmit count (PATH_MAX_RTX) 492 */ 493 seq_printf(seq, "%d ", tsp->pathmaxrxt); 494 495 /* 496 * remote address retransmit count (REM_ADDR_RTX) 497 * Note: We don't have a way to tally this at the moment 498 * so lets just leave it as zero for the moment 499 */ 500 seq_printf(seq, "0 "); 501 502 /* 503 * remote address start time (START). This is also not 504 * currently implemented, but we can record it with a 505 * jiffies marker in a subsequent patch 506 */ 507 seq_printf(seq, "0"); 508 509 seq_printf(seq, "\n"); 510 } 511 } 512 513 rcu_read_unlock(); 514 read_unlock(&head->lock); 515 sctp_local_bh_enable(); 516 517 return 0; 518 519 } 520 521 static const struct seq_operations sctp_remaddr_ops = { 522 .start = sctp_remaddr_seq_start, 523 .next = sctp_remaddr_seq_next, 524 .stop = sctp_remaddr_seq_stop, 525 .show = sctp_remaddr_seq_show, 526 }; 527 528 /* Cleanup the proc fs entry for 'remaddr' object. */ 529 void sctp_remaddr_proc_exit(struct net *net) 530 { 531 remove_proc_entry("remaddr", net->sctp.proc_net_sctp); 532 } 533 534 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file) 535 { 536 return seq_open_net(inode, file, &sctp_remaddr_ops, 537 sizeof(struct seq_net_private)); 538 } 539 540 static const struct file_operations sctp_remaddr_seq_fops = { 541 .open = sctp_remaddr_seq_open, 542 .read = seq_read, 543 .llseek = seq_lseek, 544 .release = seq_release_net, 545 }; 546 547 int __net_init sctp_remaddr_proc_init(struct net *net) 548 { 549 struct proc_dir_entry *p; 550 551 p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp, 552 &sctp_remaddr_seq_fops); 553 if (!p) 554 return -ENOMEM; 555 return 0; 556 } 557