net/sctp/proc.c

   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 <linux-sctp@vger.kernel.org>
  26  *
  27  * Written or modified by:
  28  *    Sridhar Samudrala <sri@us.ibm.com>
  29  */
  30
  31 #include <linux/types.h>
  32 #include <linux/seq_file.h>
  33 #include <linux/init.h>
  34 #include <linux/export.h>
  35 #include <net/sctp/sctp.h>
  36 #include <net/ip.h> /* for snmp_fold_field */
  37
  38 static const struct snmp_mib sctp_snmp_list[] = {
  39         SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB),
  40         SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS),
  41         SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS),
  42         SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS),
  43         SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS),
  44         SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES),
  45         SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS),
  46         SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS),
  47         SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS),
  48         SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS),
  49         SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS),
  50         SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS),
  51         SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS),
  52         SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS),
  53         SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS),
  54         SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS),
  55         SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS),
  56         SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
  57         SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
  58         SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
  59         SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
  60         SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
  61         SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
  62         SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
  63         SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
  64         SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
  65         SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
  66         SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
  67         SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
  68         SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
  69         SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
  70         SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
  71         SNMP_MIB_SENTINEL
  72 };
  73
  74 /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
  75 static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
  76 {
  77         struct net *net = seq->private;
  78         int i;
  79
  80         for (i = 0; sctp_snmp_list[i].name != NULL; i++)
  81                 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
  82                            snmp_fold_field((void __percpu **)net->sctp.sctp_statistics,
  83                                       sctp_snmp_list[i].entry));
  84
  85         return 0;
  86 }
  87
  88 /* Initialize the seq file operations for 'snmp' object. */
  89 static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
  90 {
  91         return single_open_net(inode, file, sctp_snmp_seq_show);
  92 }
  93
  94 static const struct file_operations sctp_snmp_seq_fops = {
  95         .owner   = THIS_MODULE,
  96         .open    = sctp_snmp_seq_open,
  97         .read    = seq_read,
  98         .llseek  = seq_lseek,
  99         .release = single_release_net,
 100 };
 101
 102 /* Set up the proc fs entry for 'snmp' object. */
 103 int __net_init sctp_snmp_proc_init(struct net *net)
 104 {
 105         struct proc_dir_entry *p;
 106
 107         p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp,
 108                         &sctp_snmp_seq_fops);
 109         if (!p)
 110                 return -ENOMEM;
 111
 112         return 0;
 113 }
 114
 115 /* Cleanup the proc fs entry for 'snmp' object. */
 116 void sctp_snmp_proc_exit(struct net *net)
 117 {
 118         remove_proc_entry("snmp", net->sctp.proc_net_sctp);
 119 }
 120
 121 /* Dump local addresses of an association/endpoint. */
 122 static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
 123 {
 124         struct sctp_association *asoc;
 125         struct sctp_sockaddr_entry *laddr;
 126         struct sctp_transport *peer;
 127         union sctp_addr *addr, *primary = NULL;
 128         struct sctp_af *af;
 129
 130         if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
 131                 asoc = sctp_assoc(epb);
 132
 133                 peer = asoc->peer.primary_path;
 134                 if (unlikely(peer == NULL)) {
 135                         WARN(1, "Association %p with NULL primary path!\n", asoc);
 136                         return;
 137                 }
 138
 139                 primary = &peer->saddr;
 140         }
 141
 142         rcu_read_lock();
 143         list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
 144                 if (!laddr->valid)
 145                         continue;
 146
 147                 addr = &laddr->a;
 148                 af = sctp_get_af_specific(addr->sa.sa_family);
 149                 if (primary && af->cmp_addr(addr, primary)) {
 150                         seq_printf(seq, "*");
 151                 }
 152                 af->seq_dump_addr(seq, addr);
 153         }
 154         rcu_read_unlock();
 155 }
 156
 157 /* Dump remote addresses of an association. */
 158 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
 159 {
 160         struct sctp_transport *transport;
 161         union sctp_addr *addr, *primary;
 162         struct sctp_af *af;
 163
 164         primary = &assoc->peer.primary_addr;
 165         rcu_read_lock();
 166         list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
 167                         transports) {
 168                 addr = &transport->ipaddr;
 169                 if (transport->dead)
 170                         continue;
 171
 172                 af = sctp_get_af_specific(addr->sa.sa_family);
 173                 if (af->cmp_addr(addr, primary)) {
 174                         seq_printf(seq, "*");
 175                 }
 176                 af->seq_dump_addr(seq, addr);
 177         }
 178         rcu_read_unlock();
 179 }
 180
 181 static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
 182 {
 183         if (*pos >= sctp_ep_hashsize)
 184                 return NULL;
 185
 186         if (*pos < 0)
 187                 *pos = 0;
 188
 189         if (*pos == 0)
 190                 seq_printf(seq, " ENDPT     SOCK   STY SST HBKT LPORT   UID INODE LADDRS\n");
 191
 192         return (void *)pos;
 193 }
 194
 195 static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
 196 {
 197 }
 198
 199
 200 static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 201 {
 202         if (++*pos >= sctp_ep_hashsize)
 203                 return NULL;
 204
 205         return pos;
 206 }
 207
 208
 209 /* Display sctp endpoints (/proc/net/sctp/eps). */
 210 static int sctp_eps_seq_show(struct seq_file *seq, void *v)
 211 {
 212         struct sctp_hashbucket *head;
 213         struct sctp_ep_common *epb;
 214         struct sctp_endpoint *ep;
 215         struct sock *sk;
 216         int    hash = *(loff_t *)v;
 217
 218         if (hash >= sctp_ep_hashsize)
 219                 return -ENOMEM;
 220
 221         head = &sctp_ep_hashtable[hash];
 222         sctp_local_bh_disable();
 223         read_lock(&head->lock);
 224         sctp_for_each_hentry(epb, &head->chain) {
 225                 ep = sctp_ep(epb);
 226                 sk = epb->sk;
 227                 if (!net_eq(sock_net(sk), seq_file_net(seq)))
 228                         continue;
 229                 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
 230                            sctp_sk(sk)->type, sk->sk_state, hash,
 231                            epb->bind_addr.port,
 232                            from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
 233                            sock_i_ino(sk));
 234
 235                 sctp_seq_dump_local_addrs(seq, epb);
 236                 seq_printf(seq, "\n");
 237         }
 238         read_unlock(&head->lock);
 239         sctp_local_bh_enable();
 240
 241         return 0;
 242 }
 243
 244 static const struct seq_operations sctp_eps_ops = {
 245         .start = sctp_eps_seq_start,
 246         .next  = sctp_eps_seq_next,
 247         .stop  = sctp_eps_seq_stop,
 248         .show  = sctp_eps_seq_show,
 249 };
 250
 251
 252 /* Initialize the seq file operations for 'eps' object. */
 253 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
 254 {
 255         return seq_open_net(inode, file, &sctp_eps_ops,
 256                             sizeof(struct seq_net_private));
 257 }
 258
 259 static const struct file_operations sctp_eps_seq_fops = {
 260         .open    = sctp_eps_seq_open,
 261         .read    = seq_read,
 262         .llseek  = seq_lseek,
 263         .release = seq_release_net,
 264 };
 265
 266 /* Set up the proc fs entry for 'eps' object. */
 267 int __net_init sctp_eps_proc_init(struct net *net)
 268 {
 269         struct proc_dir_entry *p;
 270
 271         p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp,
 272                         &sctp_eps_seq_fops);
 273         if (!p)
 274                 return -ENOMEM;
 275
 276         return 0;
 277 }
 278
 279 /* Cleanup the proc fs entry for 'eps' object. */
 280 void sctp_eps_proc_exit(struct net *net)
 281 {
 282         remove_proc_entry("eps", net->sctp.proc_net_sctp);
 283 }
 284
 285
 286 static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
 287 {
 288         if (*pos >= sctp_assoc_hashsize)
 289                 return NULL;
 290
 291         if (*pos < 0)
 292                 *pos = 0;
 293
 294         if (*pos == 0)
 295                 seq_printf(seq, " ASSOC     SOCK   STY SST ST HBKT "
 296                                 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
 297                                 "RPORT LADDRS <-> RADDRS "
 298                                 "HBINT INS OUTS MAXRT T1X T2X RTXC "
 299                                 "wmema wmemq sndbuf rcvbuf\n");
 300
 301         return (void *)pos;
 302 }
 303
 304 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
 305 {
 306 }
 307
 308
 309 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 310 {
 311         if (++*pos >= sctp_assoc_hashsize)
 312                 return NULL;
 313
 314         return pos;
 315 }
 316
 317 /* Display sctp associations (/proc/net/sctp/assocs). */
 318 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
 319 {
 320         struct sctp_hashbucket *head;
 321         struct sctp_ep_common *epb;
 322         struct sctp_association *assoc;
 323         struct sock *sk;
 324         int    hash = *(loff_t *)v;
 325
 326         if (hash >= sctp_assoc_hashsize)
 327                 return -ENOMEM;
 328
 329         head = &sctp_assoc_hashtable[hash];
 330         sctp_local_bh_disable();
 331         read_lock(&head->lock);
 332         sctp_for_each_hentry(epb, &head->chain) {
 333                 assoc = sctp_assoc(epb);
 334                 sk = epb->sk;
 335                 if (!net_eq(sock_net(sk), seq_file_net(seq)))
 336                         continue;
 337                 seq_printf(seq,
 338                            "%8pK %8pK %-3d %-3d %-2d %-4d "
 339                            "%4d %8d %8d %7u %5lu %-5d %5d ",
 340                            assoc, sk, sctp_sk(sk)->type, sk->sk_state,
 341                            assoc->state, hash,
 342                            assoc->assoc_id,
 343                            assoc->sndbuf_used,
 344                            atomic_read(&assoc->rmem_alloc),
 345                            from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
 346                            sock_i_ino(sk),
 347                            epb->bind_addr.port,
 348                            assoc->peer.port);
 349                 seq_printf(seq, " ");
 350                 sctp_seq_dump_local_addrs(seq, epb);
 351                 seq_printf(seq, "<-> ");
 352                 sctp_seq_dump_remote_addrs(seq, assoc);
 353                 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
 354                            "%8d %8d %8d %8d",
 355                         assoc->hbinterval, assoc->c.sinit_max_instreams,
 356                         assoc->c.sinit_num_ostreams, assoc->max_retrans,
 357                         assoc->init_retries, assoc->shutdown_retries,
 358                         assoc->rtx_data_chunks,
 359                         atomic_read(&sk->sk_wmem_alloc),
 360                         sk->sk_wmem_queued,
 361                         sk->sk_sndbuf,
 362                         sk->sk_rcvbuf);
 363                 seq_printf(seq, "\n");
 364         }
 365         read_unlock(&head->lock);
 366         sctp_local_bh_enable();
 367
 368         return 0;
 369 }
 370
 371 static const struct seq_operations sctp_assoc_ops = {
 372         .start = sctp_assocs_seq_start,
 373         .next  = sctp_assocs_seq_next,
 374         .stop  = sctp_assocs_seq_stop,
 375         .show  = sctp_assocs_seq_show,
 376 };
 377
 378 /* Initialize the seq file operations for 'assocs' object. */
 379 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
 380 {
 381         return seq_open_net(inode, file, &sctp_assoc_ops,
 382                             sizeof(struct seq_net_private));
 383 }
 384
 385 static const struct file_operations sctp_assocs_seq_fops = {
 386         .open    = sctp_assocs_seq_open,
 387         .read    = seq_read,
 388         .llseek  = seq_lseek,
 389         .release = seq_release_net,
 390 };
 391
 392 /* Set up the proc fs entry for 'assocs' object. */
 393 int __net_init sctp_assocs_proc_init(struct net *net)
 394 {
 395         struct proc_dir_entry *p;
 396
 397         p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
 398                         &sctp_assocs_seq_fops);
 399         if (!p)
 400                 return -ENOMEM;
 401
 402         return 0;
 403 }
 404
 405 /* Cleanup the proc fs entry for 'assocs' object. */
 406 void sctp_assocs_proc_exit(struct net *net)
 407 {
 408         remove_proc_entry("assocs", net->sctp.proc_net_sctp);
 409 }
 410
 411 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
 412 {
 413         if (*pos >= sctp_assoc_hashsize)
 414                 return NULL;
 415
 416         if (*pos < 0)
 417                 *pos = 0;
 418
 419         if (*pos == 0)
 420                 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
 421                                 "REM_ADDR_RTX  START\n");
 422
 423         return (void *)pos;
 424 }
 425
 426 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 427 {
 428         if (++*pos >= sctp_assoc_hashsize)
 429                 return NULL;
 430
 431         return pos;
 432 }
 433
 434 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
 435 {
 436 }
 437
 438 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
 439 {
 440         struct sctp_hashbucket *head;
 441         struct sctp_ep_common *epb;
 442         struct sctp_association *assoc;
 443         struct sctp_transport *tsp;
 444         int    hash = *(loff_t *)v;
 445
 446         if (hash >= sctp_assoc_hashsize)
 447                 return -ENOMEM;
 448
 449         head = &sctp_assoc_hashtable[hash];
 450         sctp_local_bh_disable();
 451         read_lock(&head->lock);
 452         rcu_read_lock();
 453         sctp_for_each_hentry(epb, &head->chain) {
 454                 if (!net_eq(sock_net(epb->sk), seq_file_net(seq)))
 455                         continue;
 456                 assoc = sctp_assoc(epb);
 457                 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
 458                                         transports) {
 459                         if (tsp->dead)
 460                                 continue;
 461
 462                         /*
 463                          * The remote address (ADDR)
 464                          */
 465                         tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
 466                         seq_printf(seq, " ");
 467
 468                         /*
 469                          * The association ID (ASSOC_ID)
 470                          */
 471                         seq_printf(seq, "%d ", tsp->asoc->assoc_id);
 472
 473                         /*
 474                          * If the Heartbeat is active (HB_ACT)
 475                          * Note: 1 = Active, 0 = Inactive
 476                          */
 477                         seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
 478
 479                         /*
 480                          * Retransmit time out (RTO)
 481                          */
 482                         seq_printf(seq, "%lu ", tsp->rto);
 483
 484                         /*
 485                          * Maximum path retransmit count (PATH_MAX_RTX)
 486                          */
 487                         seq_printf(seq, "%d ", tsp->pathmaxrxt);
 488
 489                         /*
 490                          * remote address retransmit count (REM_ADDR_RTX)
 491                          * Note: We don't have a way to tally this at the moment
 492                          * so lets just leave it as zero for the moment
 493                          */
 494                         seq_printf(seq, "0 ");
 495
 496                         /*
 497                          * remote address start time (START).  This is also not
 498                          * currently implemented, but we can record it with a
 499                          * jiffies marker in a subsequent patch
 500                          */
 501                         seq_printf(seq, "0");
 502
 503                         seq_printf(seq, "\n");
 504                 }
 505         }
 506
 507         rcu_read_unlock();
 508         read_unlock(&head->lock);
 509         sctp_local_bh_enable();
 510
 511         return 0;
 512
 513 }
 514
 515 static const struct seq_operations sctp_remaddr_ops = {
 516         .start = sctp_remaddr_seq_start,
 517         .next  = sctp_remaddr_seq_next,
 518         .stop  = sctp_remaddr_seq_stop,
 519         .show  = sctp_remaddr_seq_show,
 520 };
 521
 522 /* Cleanup the proc fs entry for 'remaddr' object. */
 523 void sctp_remaddr_proc_exit(struct net *net)
 524 {
 525         remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
 526 }
 527
 528 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
 529 {
 530         return seq_open_net(inode, file, &sctp_remaddr_ops,
 531                             sizeof(struct seq_net_private));
 532 }
 533
 534 static const struct file_operations sctp_remaddr_seq_fops = {
 535         .open = sctp_remaddr_seq_open,
 536         .read = seq_read,
 537         .llseek = seq_lseek,
 538         .release = seq_release_net,
 539 };
 540
 541 int __net_init sctp_remaddr_proc_init(struct net *net)
 542 {
 543         struct proc_dir_entry *p;
 544
 545         p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
 546                         &sctp_remaddr_seq_fops);
 547         if (!p)
 548                 return -ENOMEM;
 549         return 0;
 550 }