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 int i; 84 85 for (i = 0; sctp_snmp_list[i].name != NULL; i++) 86 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name, 87 snmp_fold_field((void __percpu **)sctp_statistics, 88 sctp_snmp_list[i].entry)); 89 90 return 0; 91 } 92 93 /* Initialize the seq file operations for 'snmp' object. */ 94 static int sctp_snmp_seq_open(struct inode *inode, struct file *file) 95 { 96 return single_open(file, sctp_snmp_seq_show, NULL); 97 } 98 99 static const struct file_operations sctp_snmp_seq_fops = { 100 .owner = THIS_MODULE, 101 .open = sctp_snmp_seq_open, 102 .read = seq_read, 103 .llseek = seq_lseek, 104 .release = single_release, 105 }; 106 107 /* Set up the proc fs entry for 'snmp' object. */ 108 int __init sctp_snmp_proc_init(void) 109 { 110 struct proc_dir_entry *p; 111 112 p = proc_create("snmp", S_IRUGO, proc_net_sctp, &sctp_snmp_seq_fops); 113 if (!p) 114 return -ENOMEM; 115 116 return 0; 117 } 118 119 /* Cleanup the proc fs entry for 'snmp' object. */ 120 void sctp_snmp_proc_exit(void) 121 { 122 remove_proc_entry("snmp", proc_net_sctp); 123 } 124 125 /* Dump local addresses of an association/endpoint. */ 126 static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb) 127 { 128 struct sctp_association *asoc; 129 struct sctp_sockaddr_entry *laddr; 130 struct sctp_transport *peer; 131 union sctp_addr *addr, *primary = NULL; 132 struct sctp_af *af; 133 134 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) { 135 asoc = sctp_assoc(epb); 136 peer = asoc->peer.primary_path; 137 primary = &peer->saddr; 138 } 139 140 list_for_each_entry(laddr, &epb->bind_addr.address_list, list) { 141 addr = &laddr->a; 142 af = sctp_get_af_specific(addr->sa.sa_family); 143 if (primary && af->cmp_addr(addr, primary)) { 144 seq_printf(seq, "*"); 145 } 146 af->seq_dump_addr(seq, addr); 147 } 148 } 149 150 /* Dump remote addresses of an association. */ 151 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc) 152 { 153 struct sctp_transport *transport; 154 union sctp_addr *addr, *primary; 155 struct sctp_af *af; 156 157 primary = &assoc->peer.primary_addr; 158 list_for_each_entry(transport, &assoc->peer.transport_addr_list, 159 transports) { 160 addr = &transport->ipaddr; 161 af = sctp_get_af_specific(addr->sa.sa_family); 162 if (af->cmp_addr(addr, primary)) { 163 seq_printf(seq, "*"); 164 } 165 af->seq_dump_addr(seq, addr); 166 } 167 } 168 169 static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos) 170 { 171 if (*pos >= sctp_ep_hashsize) 172 return NULL; 173 174 if (*pos < 0) 175 *pos = 0; 176 177 if (*pos == 0) 178 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n"); 179 180 return (void *)pos; 181 } 182 183 static void sctp_eps_seq_stop(struct seq_file *seq, void *v) 184 { 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, "%8pK %8pK %-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 } 290 291 292 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos) 293 { 294 if (++*pos >= sctp_assoc_hashsize) 295 return NULL; 296 297 return pos; 298 } 299 300 /* Display sctp associations (/proc/net/sctp/assocs). */ 301 static int sctp_assocs_seq_show(struct seq_file *seq, void *v) 302 { 303 struct sctp_hashbucket *head; 304 struct sctp_ep_common *epb; 305 struct sctp_association *assoc; 306 struct sock *sk; 307 struct hlist_node *node; 308 int hash = *(loff_t *)v; 309 310 if (hash >= sctp_assoc_hashsize) 311 return -ENOMEM; 312 313 head = &sctp_assoc_hashtable[hash]; 314 sctp_local_bh_disable(); 315 read_lock(&head->lock); 316 sctp_for_each_hentry(epb, node, &head->chain) { 317 assoc = sctp_assoc(epb); 318 sk = epb->sk; 319 seq_printf(seq, 320 "%8pK %8pK %-3d %-3d %-2d %-4d " 321 "%4d %8d %8d %7d %5lu %-5d %5d ", 322 assoc, sk, sctp_sk(sk)->type, sk->sk_state, 323 assoc->state, hash, 324 assoc->assoc_id, 325 assoc->sndbuf_used, 326 atomic_read(&assoc->rmem_alloc), 327 sock_i_uid(sk), sock_i_ino(sk), 328 epb->bind_addr.port, 329 assoc->peer.port); 330 seq_printf(seq, " "); 331 sctp_seq_dump_local_addrs(seq, epb); 332 seq_printf(seq, "<-> "); 333 sctp_seq_dump_remote_addrs(seq, assoc); 334 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d ", 335 assoc->hbinterval, assoc->c.sinit_max_instreams, 336 assoc->c.sinit_num_ostreams, assoc->max_retrans, 337 assoc->init_retries, assoc->shutdown_retries, 338 assoc->rtx_data_chunks); 339 seq_printf(seq, "\n"); 340 } 341 read_unlock(&head->lock); 342 sctp_local_bh_enable(); 343 344 return 0; 345 } 346 347 static const struct seq_operations sctp_assoc_ops = { 348 .start = sctp_assocs_seq_start, 349 .next = sctp_assocs_seq_next, 350 .stop = sctp_assocs_seq_stop, 351 .show = sctp_assocs_seq_show, 352 }; 353 354 /* Initialize the seq file operations for 'assocs' object. */ 355 static int sctp_assocs_seq_open(struct inode *inode, struct file *file) 356 { 357 return seq_open(file, &sctp_assoc_ops); 358 } 359 360 static const struct file_operations sctp_assocs_seq_fops = { 361 .open = sctp_assocs_seq_open, 362 .read = seq_read, 363 .llseek = seq_lseek, 364 .release = seq_release, 365 }; 366 367 /* Set up the proc fs entry for 'assocs' object. */ 368 int __init sctp_assocs_proc_init(void) 369 { 370 struct proc_dir_entry *p; 371 372 p = proc_create("assocs", S_IRUGO, proc_net_sctp, 373 &sctp_assocs_seq_fops); 374 if (!p) 375 return -ENOMEM; 376 377 return 0; 378 } 379 380 /* Cleanup the proc fs entry for 'assocs' object. */ 381 void sctp_assocs_proc_exit(void) 382 { 383 remove_proc_entry("assocs", proc_net_sctp); 384 } 385 386 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos) 387 { 388 if (*pos >= sctp_assoc_hashsize) 389 return NULL; 390 391 if (*pos < 0) 392 *pos = 0; 393 394 if (*pos == 0) 395 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX " 396 "REM_ADDR_RTX START\n"); 397 398 return (void *)pos; 399 } 400 401 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos) 402 { 403 if (++*pos >= sctp_assoc_hashsize) 404 return NULL; 405 406 return pos; 407 } 408 409 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v) 410 { 411 } 412 413 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v) 414 { 415 struct sctp_hashbucket *head; 416 struct sctp_ep_common *epb; 417 struct sctp_association *assoc; 418 struct hlist_node *node; 419 struct sctp_transport *tsp; 420 int hash = *(loff_t *)v; 421 422 if (hash >= sctp_assoc_hashsize) 423 return -ENOMEM; 424 425 head = &sctp_assoc_hashtable[hash]; 426 sctp_local_bh_disable(); 427 read_lock(&head->lock); 428 sctp_for_each_hentry(epb, node, &head->chain) { 429 assoc = sctp_assoc(epb); 430 list_for_each_entry(tsp, &assoc->peer.transport_addr_list, 431 transports) { 432 /* 433 * The remote address (ADDR) 434 */ 435 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr); 436 seq_printf(seq, " "); 437 438 /* 439 * The association ID (ASSOC_ID) 440 */ 441 seq_printf(seq, "%d ", tsp->asoc->assoc_id); 442 443 /* 444 * If the Heartbeat is active (HB_ACT) 445 * Note: 1 = Active, 0 = Inactive 446 */ 447 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer)); 448 449 /* 450 * Retransmit time out (RTO) 451 */ 452 seq_printf(seq, "%lu ", tsp->rto); 453 454 /* 455 * Maximum path retransmit count (PATH_MAX_RTX) 456 */ 457 seq_printf(seq, "%d ", tsp->pathmaxrxt); 458 459 /* 460 * remote address retransmit count (REM_ADDR_RTX) 461 * Note: We don't have a way to tally this at the moment 462 * so lets just leave it as zero for the moment 463 */ 464 seq_printf(seq, "0 "); 465 466 /* 467 * remote address start time (START). This is also not 468 * currently implemented, but we can record it with a 469 * jiffies marker in a subsequent patch 470 */ 471 seq_printf(seq, "0"); 472 473 seq_printf(seq, "\n"); 474 } 475 } 476 477 read_unlock(&head->lock); 478 sctp_local_bh_enable(); 479 480 return 0; 481 482 } 483 484 static const struct seq_operations sctp_remaddr_ops = { 485 .start = sctp_remaddr_seq_start, 486 .next = sctp_remaddr_seq_next, 487 .stop = sctp_remaddr_seq_stop, 488 .show = sctp_remaddr_seq_show, 489 }; 490 491 /* Cleanup the proc fs entry for 'remaddr' object. */ 492 void sctp_remaddr_proc_exit(void) 493 { 494 remove_proc_entry("remaddr", proc_net_sctp); 495 } 496 497 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file) 498 { 499 return seq_open(file, &sctp_remaddr_ops); 500 } 501 502 static const struct file_operations sctp_remaddr_seq_fops = { 503 .open = sctp_remaddr_seq_open, 504 .read = seq_read, 505 .llseek = seq_lseek, 506 .release = seq_release, 507 }; 508 509 int __init sctp_remaddr_proc_init(void) 510 { 511 struct proc_dir_entry *p; 512 513 p = proc_create("remaddr", S_IRUGO, proc_net_sctp, &sctp_remaddr_seq_fops); 514 if (!p) 515 return -ENOMEM; 516 return 0; 517 } 518