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