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, 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 list_for_each_entry(laddr, &epb->bind_addr.address_list, list) { 143 addr = &laddr->a; 144 af = sctp_get_af_specific(addr->sa.sa_family); 145 if (primary && af->cmp_addr(addr, primary)) { 146 seq_printf(seq, "*"); 147 } 148 af->seq_dump_addr(seq, addr); 149 } 150 } 151 152 /* Dump remote addresses of an association. */ 153 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc) 154 { 155 struct sctp_transport *transport; 156 union sctp_addr *addr, *primary; 157 struct sctp_af *af; 158 159 primary = &assoc->peer.primary_addr; 160 list_for_each_entry(transport, &assoc->peer.transport_addr_list, 161 transports) { 162 addr = &transport->ipaddr; 163 af = sctp_get_af_specific(addr->sa.sa_family); 164 if (af->cmp_addr(addr, primary)) { 165 seq_printf(seq, "*"); 166 } 167 af->seq_dump_addr(seq, addr); 168 } 169 } 170 171 static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos) 172 { 173 if (*pos >= sctp_ep_hashsize) 174 return NULL; 175 176 if (*pos < 0) 177 *pos = 0; 178 179 if (*pos == 0) 180 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n"); 181 182 return (void *)pos; 183 } 184 185 static void sctp_eps_seq_stop(struct seq_file *seq, void *v) 186 { 187 } 188 189 190 static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos) 191 { 192 if (++*pos >= sctp_ep_hashsize) 193 return NULL; 194 195 return pos; 196 } 197 198 199 /* Display sctp endpoints (/proc/net/sctp/eps). */ 200 static int sctp_eps_seq_show(struct seq_file *seq, void *v) 201 { 202 struct sctp_hashbucket *head; 203 struct sctp_ep_common *epb; 204 struct sctp_endpoint *ep; 205 struct sock *sk; 206 struct hlist_node *node; 207 int hash = *(loff_t *)v; 208 209 if (hash >= sctp_ep_hashsize) 210 return -ENOMEM; 211 212 head = &sctp_ep_hashtable[hash]; 213 sctp_local_bh_disable(); 214 read_lock(&head->lock); 215 sctp_for_each_hentry(epb, node, &head->chain) { 216 ep = sctp_ep(epb); 217 sk = epb->sk; 218 if (!net_eq(sock_net(sk), seq_file_net(seq))) 219 continue; 220 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk, 221 sctp_sk(sk)->type, sk->sk_state, hash, 222 epb->bind_addr.port, 223 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), 224 sock_i_ino(sk)); 225 226 sctp_seq_dump_local_addrs(seq, epb); 227 seq_printf(seq, "\n"); 228 } 229 read_unlock(&head->lock); 230 sctp_local_bh_enable(); 231 232 return 0; 233 } 234 235 static const struct seq_operations sctp_eps_ops = { 236 .start = sctp_eps_seq_start, 237 .next = sctp_eps_seq_next, 238 .stop = sctp_eps_seq_stop, 239 .show = sctp_eps_seq_show, 240 }; 241 242 243 /* Initialize the seq file operations for 'eps' object. */ 244 static int sctp_eps_seq_open(struct inode *inode, struct file *file) 245 { 246 return seq_open_net(inode, file, &sctp_eps_ops, 247 sizeof(struct seq_net_private)); 248 } 249 250 static const struct file_operations sctp_eps_seq_fops = { 251 .open = sctp_eps_seq_open, 252 .read = seq_read, 253 .llseek = seq_lseek, 254 .release = seq_release, 255 }; 256 257 /* Set up the proc fs entry for 'eps' object. */ 258 int __net_init sctp_eps_proc_init(struct net *net) 259 { 260 struct proc_dir_entry *p; 261 262 p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp, 263 &sctp_eps_seq_fops); 264 if (!p) 265 return -ENOMEM; 266 267 return 0; 268 } 269 270 /* Cleanup the proc fs entry for 'eps' object. */ 271 void sctp_eps_proc_exit(struct net *net) 272 { 273 remove_proc_entry("eps", net->sctp.proc_net_sctp); 274 } 275 276 277 static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos) 278 { 279 if (*pos >= sctp_assoc_hashsize) 280 return NULL; 281 282 if (*pos < 0) 283 *pos = 0; 284 285 if (*pos == 0) 286 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT " 287 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT " 288 "RPORT LADDRS <-> RADDRS " 289 "HBINT INS OUTS MAXRT T1X T2X RTXC\n"); 290 291 return (void *)pos; 292 } 293 294 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v) 295 { 296 } 297 298 299 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos) 300 { 301 if (++*pos >= sctp_assoc_hashsize) 302 return NULL; 303 304 return pos; 305 } 306 307 /* Display sctp associations (/proc/net/sctp/assocs). */ 308 static int sctp_assocs_seq_show(struct seq_file *seq, void *v) 309 { 310 struct sctp_hashbucket *head; 311 struct sctp_ep_common *epb; 312 struct sctp_association *assoc; 313 struct sock *sk; 314 struct hlist_node *node; 315 int hash = *(loff_t *)v; 316 317 if (hash >= sctp_assoc_hashsize) 318 return -ENOMEM; 319 320 head = &sctp_assoc_hashtable[hash]; 321 sctp_local_bh_disable(); 322 read_lock(&head->lock); 323 sctp_for_each_hentry(epb, node, &head->chain) { 324 assoc = sctp_assoc(epb); 325 sk = epb->sk; 326 if (!net_eq(sock_net(sk), seq_file_net(seq))) 327 continue; 328 seq_printf(seq, 329 "%8pK %8pK %-3d %-3d %-2d %-4d " 330 "%4d %8d %8d %7d %5lu %-5d %5d ", 331 assoc, sk, sctp_sk(sk)->type, sk->sk_state, 332 assoc->state, hash, 333 assoc->assoc_id, 334 assoc->sndbuf_used, 335 atomic_read(&assoc->rmem_alloc), 336 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), 337 sock_i_ino(sk), 338 epb->bind_addr.port, 339 assoc->peer.port); 340 seq_printf(seq, " "); 341 sctp_seq_dump_local_addrs(seq, epb); 342 seq_printf(seq, "<-> "); 343 sctp_seq_dump_remote_addrs(seq, assoc); 344 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d ", 345 assoc->hbinterval, assoc->c.sinit_max_instreams, 346 assoc->c.sinit_num_ostreams, assoc->max_retrans, 347 assoc->init_retries, assoc->shutdown_retries, 348 assoc->rtx_data_chunks); 349 seq_printf(seq, "\n"); 350 } 351 read_unlock(&head->lock); 352 sctp_local_bh_enable(); 353 354 return 0; 355 } 356 357 static const struct seq_operations sctp_assoc_ops = { 358 .start = sctp_assocs_seq_start, 359 .next = sctp_assocs_seq_next, 360 .stop = sctp_assocs_seq_stop, 361 .show = sctp_assocs_seq_show, 362 }; 363 364 /* Initialize the seq file operations for 'assocs' object. */ 365 static int sctp_assocs_seq_open(struct inode *inode, struct file *file) 366 { 367 return seq_open_net(inode, file, &sctp_assoc_ops, 368 sizeof(struct seq_net_private)); 369 } 370 371 static const struct file_operations sctp_assocs_seq_fops = { 372 .open = sctp_assocs_seq_open, 373 .read = seq_read, 374 .llseek = seq_lseek, 375 .release = seq_release, 376 }; 377 378 /* Set up the proc fs entry for 'assocs' object. */ 379 int __net_init sctp_assocs_proc_init(struct net *net) 380 { 381 struct proc_dir_entry *p; 382 383 p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp, 384 &sctp_assocs_seq_fops); 385 if (!p) 386 return -ENOMEM; 387 388 return 0; 389 } 390 391 /* Cleanup the proc fs entry for 'assocs' object. */ 392 void sctp_assocs_proc_exit(struct net *net) 393 { 394 remove_proc_entry("assocs", net->sctp.proc_net_sctp); 395 } 396 397 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos) 398 { 399 if (*pos >= sctp_assoc_hashsize) 400 return NULL; 401 402 if (*pos < 0) 403 *pos = 0; 404 405 if (*pos == 0) 406 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX " 407 "REM_ADDR_RTX START\n"); 408 409 return (void *)pos; 410 } 411 412 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos) 413 { 414 if (++*pos >= sctp_assoc_hashsize) 415 return NULL; 416 417 return pos; 418 } 419 420 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v) 421 { 422 } 423 424 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v) 425 { 426 struct sctp_hashbucket *head; 427 struct sctp_ep_common *epb; 428 struct sctp_association *assoc; 429 struct hlist_node *node; 430 struct sctp_transport *tsp; 431 int hash = *(loff_t *)v; 432 433 if (hash >= sctp_assoc_hashsize) 434 return -ENOMEM; 435 436 head = &sctp_assoc_hashtable[hash]; 437 sctp_local_bh_disable(); 438 read_lock(&head->lock); 439 sctp_for_each_hentry(epb, node, &head->chain) { 440 if (!net_eq(sock_net(epb->sk), seq_file_net(seq))) 441 continue; 442 assoc = sctp_assoc(epb); 443 list_for_each_entry(tsp, &assoc->peer.transport_addr_list, 444 transports) { 445 /* 446 * The remote address (ADDR) 447 */ 448 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr); 449 seq_printf(seq, " "); 450 451 /* 452 * The association ID (ASSOC_ID) 453 */ 454 seq_printf(seq, "%d ", tsp->asoc->assoc_id); 455 456 /* 457 * If the Heartbeat is active (HB_ACT) 458 * Note: 1 = Active, 0 = Inactive 459 */ 460 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer)); 461 462 /* 463 * Retransmit time out (RTO) 464 */ 465 seq_printf(seq, "%lu ", tsp->rto); 466 467 /* 468 * Maximum path retransmit count (PATH_MAX_RTX) 469 */ 470 seq_printf(seq, "%d ", tsp->pathmaxrxt); 471 472 /* 473 * remote address retransmit count (REM_ADDR_RTX) 474 * Note: We don't have a way to tally this at the moment 475 * so lets just leave it as zero for the moment 476 */ 477 seq_printf(seq, "0 "); 478 479 /* 480 * remote address start time (START). This is also not 481 * currently implemented, but we can record it with a 482 * jiffies marker in a subsequent patch 483 */ 484 seq_printf(seq, "0"); 485 486 seq_printf(seq, "\n"); 487 } 488 } 489 490 read_unlock(&head->lock); 491 sctp_local_bh_enable(); 492 493 return 0; 494 495 } 496 497 static const struct seq_operations sctp_remaddr_ops = { 498 .start = sctp_remaddr_seq_start, 499 .next = sctp_remaddr_seq_next, 500 .stop = sctp_remaddr_seq_stop, 501 .show = sctp_remaddr_seq_show, 502 }; 503 504 /* Cleanup the proc fs entry for 'remaddr' object. */ 505 void sctp_remaddr_proc_exit(struct net *net) 506 { 507 remove_proc_entry("remaddr", net->sctp.proc_net_sctp); 508 } 509 510 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file) 511 { 512 return seq_open_net(inode, file, &sctp_remaddr_ops, 513 sizeof(struct seq_net_private)); 514 } 515 516 static const struct file_operations sctp_remaddr_seq_fops = { 517 .open = sctp_remaddr_seq_open, 518 .read = seq_read, 519 .llseek = seq_lseek, 520 .release = seq_release, 521 }; 522 523 int __net_init sctp_remaddr_proc_init(struct net *net) 524 { 525 struct proc_dir_entry *p; 526 527 p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp, 528 &sctp_remaddr_seq_fops); 529 if (!p) 530 return -ENOMEM; 531 return 0; 532 } 533