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 37static 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). */ 74static int sctp_snmp_seq_show(struct seq_file *seq, void *v) 75{ 76 struct net *net = seq->private; 77 int i; 78 79 for (i = 0; sctp_snmp_list[i].name != NULL; i++) 80 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name, 81 snmp_fold_field(net->sctp.sctp_statistics, 82 sctp_snmp_list[i].entry)); 83 84 return 0; 85} 86 87/* Initialize the seq file operations for 'snmp' object. */ 88static int sctp_snmp_seq_open(struct inode *inode, struct file *file) 89{ 90 return single_open_net(inode, file, sctp_snmp_seq_show); 91} 92 93static const struct file_operations sctp_snmp_seq_fops = { 94 .owner = THIS_MODULE, 95 .open = sctp_snmp_seq_open, 96 .read = seq_read, 97 .llseek = seq_lseek, 98 .release = single_release_net, 99}; 100 101/* Set up the proc fs entry for 'snmp' object. */ 102int __net_init sctp_snmp_proc_init(struct net *net) 103{ 104 struct proc_dir_entry *p; 105 106 p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp, 107 &sctp_snmp_seq_fops); 108 if (!p) 109 return -ENOMEM; 110 111 return 0; 112} 113 114/* Cleanup the proc fs entry for 'snmp' object. */ 115void sctp_snmp_proc_exit(struct net *net) 116{ 117 remove_proc_entry("snmp", net->sctp.proc_net_sctp); 118} 119 120/* Dump local addresses of an association/endpoint. */ 121static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb) 122{ 123 struct sctp_association *asoc; 124 struct sctp_sockaddr_entry *laddr; 125 struct sctp_transport *peer; 126 union sctp_addr *addr, *primary = NULL; 127 struct sctp_af *af; 128 129 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) { 130 asoc = sctp_assoc(epb); 131 132 peer = asoc->peer.primary_path; 133 if (unlikely(peer == NULL)) { 134 WARN(1, "Association %p with NULL primary path!\n", asoc); 135 return; 136 } 137 138 primary = &peer->saddr; 139 } 140 141 rcu_read_lock(); 142 list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) { 143 if (!laddr->valid) 144 continue; 145 146 addr = &laddr->a; 147 af = sctp_get_af_specific(addr->sa.sa_family); 148 if (primary && af->cmp_addr(addr, primary)) { 149 seq_printf(seq, "*"); 150 } 151 af->seq_dump_addr(seq, addr); 152 } 153 rcu_read_unlock(); 154} 155 156/* Dump remote addresses of an association. */ 157static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc) 158{ 159 struct sctp_transport *transport; 160 union sctp_addr *addr, *primary; 161 struct sctp_af *af; 162 163 primary = &assoc->peer.primary_addr; 164 rcu_read_lock(); 165 list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list, 166 transports) { 167 addr = &transport->ipaddr; 168 if (transport->dead) 169 continue; 170 171 af = sctp_get_af_specific(addr->sa.sa_family); 172 if (af->cmp_addr(addr, primary)) { 173 seq_printf(seq, "*"); 174 } 175 af->seq_dump_addr(seq, addr); 176 } 177 rcu_read_unlock(); 178} 179 180static 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 194static void sctp_eps_seq_stop(struct seq_file *seq, void *v) 195{ 196} 197 198 199static 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). */ 209static 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 243static 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. */ 252static 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 258static 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. */ 266int __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. */ 279void sctp_eps_proc_exit(struct net *net) 280{ 281 remove_proc_entry("eps", net->sctp.proc_net_sctp); 282} 283 284 285static void *sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos) 286{ 287 if (*pos >= sctp_assoc_hashsize) 288 return NULL; 289 290 if (*pos < 0) 291 *pos = 0; 292 293 if (*pos == 0) 294 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT " 295 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT " 296 "RPORT LADDRS <-> RADDRS " 297 "HBINT INS OUTS MAXRT T1X T2X RTXC " 298 "wmema wmemq sndbuf rcvbuf\n"); 299 300 return (void *)pos; 301} 302 303static void sctp_assocs_seq_stop(struct seq_file *seq, void *v) 304{ 305} 306 307 308static 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). */ 317static 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 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 %7u %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 "%8d %8d %8d %8d", 354 assoc->hbinterval, assoc->c.sinit_max_instreams, 355 assoc->c.sinit_num_ostreams, assoc->max_retrans, 356 assoc->init_retries, assoc->shutdown_retries, 357 assoc->rtx_data_chunks, 358 atomic_read(&sk->sk_wmem_alloc), 359 sk->sk_wmem_queued, 360 sk->sk_sndbuf, 361 sk->sk_rcvbuf); 362 seq_printf(seq, "\n"); 363 } 364 read_unlock(&head->lock); 365 local_bh_enable(); 366 367 return 0; 368} 369 370static const struct seq_operations sctp_assoc_ops = { 371 .start = sctp_assocs_seq_start, 372 .next = sctp_assocs_seq_next, 373 .stop = sctp_assocs_seq_stop, 374 .show = sctp_assocs_seq_show, 375}; 376 377/* Initialize the seq file operations for 'assocs' object. */ 378static int sctp_assocs_seq_open(struct inode *inode, struct file *file) 379{ 380 return seq_open_net(inode, file, &sctp_assoc_ops, 381 sizeof(struct seq_net_private)); 382} 383 384static const struct file_operations sctp_assocs_seq_fops = { 385 .open = sctp_assocs_seq_open, 386 .read = seq_read, 387 .llseek = seq_lseek, 388 .release = seq_release_net, 389}; 390 391/* Set up the proc fs entry for 'assocs' object. */ 392int __net_init sctp_assocs_proc_init(struct net *net) 393{ 394 struct proc_dir_entry *p; 395 396 p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp, 397 &sctp_assocs_seq_fops); 398 if (!p) 399 return -ENOMEM; 400 401 return 0; 402} 403 404/* Cleanup the proc fs entry for 'assocs' object. */ 405void sctp_assocs_proc_exit(struct net *net) 406{ 407 remove_proc_entry("assocs", net->sctp.proc_net_sctp); 408} 409 410static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos) 411{ 412 if (*pos >= sctp_assoc_hashsize) 413 return NULL; 414 415 if (*pos < 0) 416 *pos = 0; 417 418 if (*pos == 0) 419 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX " 420 "REM_ADDR_RTX START STATE\n"); 421 422 return (void *)pos; 423} 424 425static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos) 426{ 427 if (++*pos >= sctp_assoc_hashsize) 428 return NULL; 429 430 return pos; 431} 432 433static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v) 434{ 435} 436 437static int sctp_remaddr_seq_show(struct seq_file *seq, void *v) 438{ 439 struct sctp_hashbucket *head; 440 struct sctp_ep_common *epb; 441 struct sctp_association *assoc; 442 struct sctp_transport *tsp; 443 int hash = *(loff_t *)v; 444 445 if (hash >= sctp_assoc_hashsize) 446 return -ENOMEM; 447 448 head = &sctp_assoc_hashtable[hash]; 449 local_bh_disable(); 450 read_lock(&head->lock); 451 rcu_read_lock(); 452 sctp_for_each_hentry(epb, &head->chain) { 453 if (!net_eq(sock_net(epb->sk), seq_file_net(seq))) 454 continue; 455 assoc = sctp_assoc(epb); 456 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list, 457 transports) { 458 if (tsp->dead) 459 continue; 460 461 /* 462 * The remote address (ADDR) 463 */ 464 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr); 465 seq_printf(seq, " "); 466 467 /* 468 * The association ID (ASSOC_ID) 469 */ 470 seq_printf(seq, "%d ", tsp->asoc->assoc_id); 471 472 /* 473 * If the Heartbeat is active (HB_ACT) 474 * Note: 1 = Active, 0 = Inactive 475 */ 476 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer)); 477 478 /* 479 * Retransmit time out (RTO) 480 */ 481 seq_printf(seq, "%lu ", tsp->rto); 482 483 /* 484 * Maximum path retransmit count (PATH_MAX_RTX) 485 */ 486 seq_printf(seq, "%d ", tsp->pathmaxrxt); 487 488 /* 489 * remote address retransmit count (REM_ADDR_RTX) 490 * Note: We don't have a way to tally this at the moment 491 * so lets just leave it as zero for the moment 492 */ 493 seq_puts(seq, "0 "); 494 495 /* 496 * remote address start time (START). This is also not 497 * currently implemented, but we can record it with a 498 * jiffies marker in a subsequent patch 499 */ 500 seq_puts(seq, "0 "); 501 502 /* 503 * The current state of this destination. I.e. 504 * SCTP_ACTIVE, SCTP_INACTIVE, ... 505 */ 506 seq_printf(seq, "%d", tsp->state); 507 508 seq_printf(seq, "\n"); 509 } 510 } 511 512 rcu_read_unlock(); 513 read_unlock(&head->lock); 514 local_bh_enable(); 515 516 return 0; 517 518} 519 520static const struct seq_operations sctp_remaddr_ops = { 521 .start = sctp_remaddr_seq_start, 522 .next = sctp_remaddr_seq_next, 523 .stop = sctp_remaddr_seq_stop, 524 .show = sctp_remaddr_seq_show, 525}; 526 527/* Cleanup the proc fs entry for 'remaddr' object. */ 528void sctp_remaddr_proc_exit(struct net *net) 529{ 530 remove_proc_entry("remaddr", net->sctp.proc_net_sctp); 531} 532 533static int sctp_remaddr_seq_open(struct inode *inode, struct file *file) 534{ 535 return seq_open_net(inode, file, &sctp_remaddr_ops, 536 sizeof(struct seq_net_private)); 537} 538 539static const struct file_operations sctp_remaddr_seq_fops = { 540 .open = sctp_remaddr_seq_open, 541 .read = seq_read, 542 .llseek = seq_lseek, 543 .release = seq_release_net, 544}; 545 546int __net_init sctp_remaddr_proc_init(struct net *net) 547{ 548 struct proc_dir_entry *p; 549 550 p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp, 551 &sctp_remaddr_seq_fops); 552 if (!p) 553 return -ENOMEM; 554 return 0; 555} 556