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