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 peer = asoc->peer.primary_path; 139 primary = &peer->saddr; 140 } 141 142 rcu_read_lock(); 143 list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) { 144 if (!laddr->valid) 145 continue; 146 147 addr = &laddr->a; 148 af = sctp_get_af_specific(addr->sa.sa_family); 149 if (primary && af->cmp_addr(addr, primary)) { 150 seq_printf(seq, "*"); 151 } 152 af->seq_dump_addr(seq, addr); 153 } 154 rcu_read_unlock(); 155 } 156 157 /* Dump remote addresses of an association. */ 158 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc) 159 { 160 struct sctp_transport *transport; 161 union sctp_addr *addr, *primary; 162 struct sctp_af *af; 163 164 primary = &assoc->peer.primary_addr; 165 rcu_read_lock(); 166 list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list, 167 transports) { 168 addr = &transport->ipaddr; 169 if (transport->dead) 170 continue; 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 rcu_read_unlock(); 179 } 180 181 static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos) 182 { 183 if (*pos >= sctp_ep_hashsize) 184 return NULL; 185 186 if (*pos < 0) 187 *pos = 0; 188 189 if (*pos == 0) 190 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n"); 191 192 return (void *)pos; 193 } 194 195 static void sctp_eps_seq_stop(struct seq_file *seq, void *v) 196 { 197 } 198 199 200 static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos) 201 { 202 if (++*pos >= sctp_ep_hashsize) 203 return NULL; 204 205 return pos; 206 } 207 208 209 /* Display sctp endpoints (/proc/net/sctp/eps). */ 210 static int sctp_eps_seq_show(struct seq_file *seq, void *v) 211 { 212 struct sctp_hashbucket *head; 213 struct sctp_ep_common *epb; 214 struct sctp_endpoint *ep; 215 struct sock *sk; 216 int hash = *(loff_t *)v; 217 218 if (hash >= sctp_ep_hashsize) 219 return -ENOMEM; 220 221 head = &sctp_ep_hashtable[hash]; 222 sctp_local_bh_disable(); 223 read_lock(&head->lock); 224 sctp_for_each_hentry(epb, &head->chain) { 225 ep = sctp_ep(epb); 226 sk = epb->sk; 227 if (!net_eq(sock_net(sk), seq_file_net(seq))) 228 continue; 229 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk, 230 sctp_sk(sk)->type, sk->sk_state, hash, 231 epb->bind_addr.port, 232 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), 233 sock_i_ino(sk)); 234 235 sctp_seq_dump_local_addrs(seq, epb); 236 seq_printf(seq, "\n"); 237 } 238 read_unlock(&head->lock); 239 sctp_local_bh_enable(); 240 241 return 0; 242 } 243 244 static const struct seq_operations sctp_eps_ops = { 245 .start = sctp_eps_seq_start, 246 .next = sctp_eps_seq_next, 247 .stop = sctp_eps_seq_stop, 248 .show = sctp_eps_seq_show, 249 }; 250 251 252 /* Initialize the seq file operations for 'eps' object. */ 253 static int sctp_eps_seq_open(struct inode *inode, struct file *file) 254 { 255 return seq_open_net(inode, file, &sctp_eps_ops, 256 sizeof(struct seq_net_private)); 257 } 258 259 static const struct file_operations sctp_eps_seq_fops = { 260 .open = sctp_eps_seq_open, 261 .read = seq_read, 262 .llseek = seq_lseek, 263 .release = seq_release_net, 264 }; 265 266 /* Set up the proc fs entry for 'eps' object. */ 267 int __net_init sctp_eps_proc_init(struct net *net) 268 { 269 struct proc_dir_entry *p; 270 271 p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp, 272 &sctp_eps_seq_fops); 273 if (!p) 274 return -ENOMEM; 275 276 return 0; 277 } 278 279 /* Cleanup the proc fs entry for 'eps' object. */ 280 void sctp_eps_proc_exit(struct net *net) 281 { 282 remove_proc_entry("eps", net->sctp.proc_net_sctp); 283 } 284 285 286 static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos) 287 { 288 if (*pos >= sctp_assoc_hashsize) 289 return NULL; 290 291 if (*pos < 0) 292 *pos = 0; 293 294 if (*pos == 0) 295 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT " 296 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT " 297 "RPORT LADDRS <-> RADDRS " 298 "HBINT INS OUTS MAXRT T1X T2X RTXC\n"); 299 300 return (void *)pos; 301 } 302 303 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v) 304 { 305 } 306 307 308 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos) 309 { 310 if (++*pos >= sctp_assoc_hashsize) 311 return NULL; 312 313 return pos; 314 } 315 316 /* Display sctp associations (/proc/net/sctp/assocs). */ 317 static int sctp_assocs_seq_show(struct seq_file *seq, void *v) 318 { 319 struct sctp_hashbucket *head; 320 struct sctp_ep_common *epb; 321 struct sctp_association *assoc; 322 struct sock *sk; 323 int hash = *(loff_t *)v; 324 325 if (hash >= sctp_assoc_hashsize) 326 return -ENOMEM; 327 328 head = &sctp_assoc_hashtable[hash]; 329 sctp_local_bh_disable(); 330 read_lock(&head->lock); 331 sctp_for_each_hentry(epb, &head->chain) { 332 assoc = sctp_assoc(epb); 333 sk = epb->sk; 334 if (!net_eq(sock_net(sk), seq_file_net(seq))) 335 continue; 336 seq_printf(seq, 337 "%8pK %8pK %-3d %-3d %-2d %-4d " 338 "%4d %8d %8d %7d %5lu %-5d %5d ", 339 assoc, sk, sctp_sk(sk)->type, sk->sk_state, 340 assoc->state, hash, 341 assoc->assoc_id, 342 assoc->sndbuf_used, 343 atomic_read(&assoc->rmem_alloc), 344 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), 345 sock_i_ino(sk), 346 epb->bind_addr.port, 347 assoc->peer.port); 348 seq_printf(seq, " "); 349 sctp_seq_dump_local_addrs(seq, epb); 350 seq_printf(seq, "<-> "); 351 sctp_seq_dump_remote_addrs(seq, assoc); 352 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d ", 353 assoc->hbinterval, assoc->c.sinit_max_instreams, 354 assoc->c.sinit_num_ostreams, assoc->max_retrans, 355 assoc->init_retries, assoc->shutdown_retries, 356 assoc->rtx_data_chunks); 357 seq_printf(seq, "\n"); 358 } 359 read_unlock(&head->lock); 360 sctp_local_bh_enable(); 361 362 return 0; 363 } 364 365 static const struct seq_operations sctp_assoc_ops = { 366 .start = sctp_assocs_seq_start, 367 .next = sctp_assocs_seq_next, 368 .stop = sctp_assocs_seq_stop, 369 .show = sctp_assocs_seq_show, 370 }; 371 372 /* Initialize the seq file operations for 'assocs' object. */ 373 static int sctp_assocs_seq_open(struct inode *inode, struct file *file) 374 { 375 return seq_open_net(inode, file, &sctp_assoc_ops, 376 sizeof(struct seq_net_private)); 377 } 378 379 static const struct file_operations sctp_assocs_seq_fops = { 380 .open = sctp_assocs_seq_open, 381 .read = seq_read, 382 .llseek = seq_lseek, 383 .release = seq_release_net, 384 }; 385 386 /* Set up the proc fs entry for 'assocs' object. */ 387 int __net_init sctp_assocs_proc_init(struct net *net) 388 { 389 struct proc_dir_entry *p; 390 391 p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp, 392 &sctp_assocs_seq_fops); 393 if (!p) 394 return -ENOMEM; 395 396 return 0; 397 } 398 399 /* Cleanup the proc fs entry for 'assocs' object. */ 400 void sctp_assocs_proc_exit(struct net *net) 401 { 402 remove_proc_entry("assocs", net->sctp.proc_net_sctp); 403 } 404 405 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos) 406 { 407 if (*pos >= sctp_assoc_hashsize) 408 return NULL; 409 410 if (*pos < 0) 411 *pos = 0; 412 413 if (*pos == 0) 414 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX " 415 "REM_ADDR_RTX START\n"); 416 417 return (void *)pos; 418 } 419 420 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos) 421 { 422 if (++*pos >= sctp_assoc_hashsize) 423 return NULL; 424 425 return pos; 426 } 427 428 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v) 429 { 430 } 431 432 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v) 433 { 434 struct sctp_hashbucket *head; 435 struct sctp_ep_common *epb; 436 struct sctp_association *assoc; 437 struct sctp_transport *tsp; 438 int hash = *(loff_t *)v; 439 440 if (hash >= sctp_assoc_hashsize) 441 return -ENOMEM; 442 443 head = &sctp_assoc_hashtable[hash]; 444 sctp_local_bh_disable(); 445 read_lock(&head->lock); 446 rcu_read_lock(); 447 sctp_for_each_hentry(epb, &head->chain) { 448 if (!net_eq(sock_net(epb->sk), seq_file_net(seq))) 449 continue; 450 assoc = sctp_assoc(epb); 451 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list, 452 transports) { 453 if (tsp->dead) 454 continue; 455 456 /* 457 * The remote address (ADDR) 458 */ 459 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr); 460 seq_printf(seq, " "); 461 462 /* 463 * The association ID (ASSOC_ID) 464 */ 465 seq_printf(seq, "%d ", tsp->asoc->assoc_id); 466 467 /* 468 * If the Heartbeat is active (HB_ACT) 469 * Note: 1 = Active, 0 = Inactive 470 */ 471 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer)); 472 473 /* 474 * Retransmit time out (RTO) 475 */ 476 seq_printf(seq, "%lu ", tsp->rto); 477 478 /* 479 * Maximum path retransmit count (PATH_MAX_RTX) 480 */ 481 seq_printf(seq, "%d ", tsp->pathmaxrxt); 482 483 /* 484 * remote address retransmit count (REM_ADDR_RTX) 485 * Note: We don't have a way to tally this at the moment 486 * so lets just leave it as zero for the moment 487 */ 488 seq_printf(seq, "0 "); 489 490 /* 491 * remote address start time (START). This is also not 492 * currently implemented, but we can record it with a 493 * jiffies marker in a subsequent patch 494 */ 495 seq_printf(seq, "0"); 496 497 seq_printf(seq, "\n"); 498 } 499 } 500 501 rcu_read_unlock(); 502 read_unlock(&head->lock); 503 sctp_local_bh_enable(); 504 505 return 0; 506 507 } 508 509 static const struct seq_operations sctp_remaddr_ops = { 510 .start = sctp_remaddr_seq_start, 511 .next = sctp_remaddr_seq_next, 512 .stop = sctp_remaddr_seq_stop, 513 .show = sctp_remaddr_seq_show, 514 }; 515 516 /* Cleanup the proc fs entry for 'remaddr' object. */ 517 void sctp_remaddr_proc_exit(struct net *net) 518 { 519 remove_proc_entry("remaddr", net->sctp.proc_net_sctp); 520 } 521 522 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file) 523 { 524 return seq_open_net(inode, file, &sctp_remaddr_ops, 525 sizeof(struct seq_net_private)); 526 } 527 528 static const struct file_operations sctp_remaddr_seq_fops = { 529 .open = sctp_remaddr_seq_open, 530 .read = seq_read, 531 .llseek = seq_lseek, 532 .release = seq_release_net, 533 }; 534 535 int __net_init sctp_remaddr_proc_init(struct net *net) 536 { 537 struct proc_dir_entry *p; 538 539 p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp, 540 &sctp_remaddr_seq_fops); 541 if (!p) 542 return -ENOMEM; 543 return 0; 544 } 545