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 <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         struct net *net = seq->private;
  84         int i;
  85
  86         for (i = 0; sctp_snmp_list[i].name != NULL; i++)
  87                 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
  88                            snmp_fold_field((void __percpu **)net->sctp.sctp_statistics,
  89                                       sctp_snmp_list[i].entry));
  90
  91         return 0;
  92 }
  93
  94 /* Initialize the seq file operations for 'snmp' object. */
  95 static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
  96 {
  97         return single_open_net(inode, file, sctp_snmp_seq_show);
  98 }
  99
 100 static const struct file_operations sctp_snmp_seq_fops = {
 101         .owner   = THIS_MODULE,
 102         .open    = sctp_snmp_seq_open,
 103         .read    = seq_read,
 104         .llseek  = seq_lseek,
 105         .release = single_release_net,
 106 };
 107
 108 /* Set up the proc fs entry for 'snmp' object. */
 109 int __net_init sctp_snmp_proc_init(struct net *net)
 110 {
 111         struct proc_dir_entry *p;
 112
 113         p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp,
 114                         &sctp_snmp_seq_fops);
 115         if (!p)
 116                 return -ENOMEM;
 117
 118         return 0;
 119 }
 120
 121 /* Cleanup the proc fs entry for 'snmp' object. */
 122 void sctp_snmp_proc_exit(struct net *net)
 123 {
 124         remove_proc_entry("snmp", net->sctp.proc_net_sctp);
 125 }
 126
 127 /* Dump local addresses of an association/endpoint. */
 128 static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
 129 {
 130         struct sctp_association *asoc;
 131         struct sctp_sockaddr_entry *laddr;
 132         struct sctp_transport *peer;
 133         union sctp_addr *addr, *primary = NULL;
 134         struct sctp_af *af;
 135
 136         if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
 137                 asoc = sctp_assoc(epb);
 138
 139                 peer = asoc->peer.primary_path;
 140                 if (unlikely(peer == NULL)) {
 141                         WARN(1, "Association %p with NULL primary path!\n", asoc);
 142                         return;
 143                 }
 144
 145                 primary = &peer->saddr;
 146         }
 147
 148         rcu_read_lock();
 149         list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
 150                 if (!laddr->valid)
 151                         continue;
 152
 153                 addr = &laddr->a;
 154                 af = sctp_get_af_specific(addr->sa.sa_family);
 155                 if (primary && af->cmp_addr(addr, primary)) {
 156                         seq_printf(seq, "*");
 157                 }
 158                 af->seq_dump_addr(seq, addr);
 159         }
 160         rcu_read_unlock();
 161 }
 162
 163 /* Dump remote addresses of an association. */
 164 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
 165 {
 166         struct sctp_transport *transport;
 167         union sctp_addr *addr, *primary;
 168         struct sctp_af *af;
 169
 170         primary = &assoc->peer.primary_addr;
 171         rcu_read_lock();
 172         list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
 173                         transports) {
 174                 addr = &transport->ipaddr;
 175                 if (transport->dead)
 176                         continue;
 177
 178                 af = sctp_get_af_specific(addr->sa.sa_family);
 179                 if (af->cmp_addr(addr, primary)) {
 180                         seq_printf(seq, "*");
 181                 }
 182                 af->seq_dump_addr(seq, addr);
 183         }
 184         rcu_read_unlock();
 185 }
 186
 187 static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
 188 {
 189         if (*pos >= sctp_ep_hashsize)
 190                 return NULL;
 191
 192         if (*pos < 0)
 193                 *pos = 0;
 194
 195         if (*pos == 0)
 196                 seq_printf(seq, " ENDPT     SOCK   STY SST HBKT LPORT   UID INODE LADDRS\n");
 197
 198         return (void *)pos;
 199 }
 200
 201 static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
 202 {
 203 }
 204
 205
 206 static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 207 {
 208         if (++*pos >= sctp_ep_hashsize)
 209                 return NULL;
 210
 211         return pos;
 212 }
 213
 214
 215 /* Display sctp endpoints (/proc/net/sctp/eps). */
 216 static int sctp_eps_seq_show(struct seq_file *seq, void *v)
 217 {
 218         struct sctp_hashbucket *head;
 219         struct sctp_ep_common *epb;
 220         struct sctp_endpoint *ep;
 221         struct sock *sk;
 222         int    hash = *(loff_t *)v;
 223
 224         if (hash >= sctp_ep_hashsize)
 225                 return -ENOMEM;
 226
 227         head = &sctp_ep_hashtable[hash];
 228         sctp_local_bh_disable();
 229         read_lock(&head->lock);
 230         sctp_for_each_hentry(epb, &head->chain) {
 231                 ep = sctp_ep(epb);
 232                 sk = epb->sk;
 233                 if (!net_eq(sock_net(sk), seq_file_net(seq)))
 234                         continue;
 235                 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk,
 236                            sctp_sk(sk)->type, sk->sk_state, hash,
 237                            epb->bind_addr.port,
 238                            from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
 239                            sock_i_ino(sk));
 240
 241                 sctp_seq_dump_local_addrs(seq, epb);
 242                 seq_printf(seq, "\n");
 243         }
 244         read_unlock(&head->lock);
 245         sctp_local_bh_enable();
 246
 247         return 0;
 248 }
 249
 250 static const struct seq_operations sctp_eps_ops = {
 251         .start = sctp_eps_seq_start,
 252         .next  = sctp_eps_seq_next,
 253         .stop  = sctp_eps_seq_stop,
 254         .show  = sctp_eps_seq_show,
 255 };
 256
 257
 258 /* Initialize the seq file operations for 'eps' object. */
 259 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
 260 {
 261         return seq_open_net(inode, file, &sctp_eps_ops,
 262                             sizeof(struct seq_net_private));
 263 }
 264
 265 static const struct file_operations sctp_eps_seq_fops = {
 266         .open    = sctp_eps_seq_open,
 267         .read    = seq_read,
 268         .llseek  = seq_lseek,
 269         .release = seq_release_net,
 270 };
 271
 272 /* Set up the proc fs entry for 'eps' object. */
 273 int __net_init sctp_eps_proc_init(struct net *net)
 274 {
 275         struct proc_dir_entry *p;
 276
 277         p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp,
 278                         &sctp_eps_seq_fops);
 279         if (!p)
 280                 return -ENOMEM;
 281
 282         return 0;
 283 }
 284
 285 /* Cleanup the proc fs entry for 'eps' object. */
 286 void sctp_eps_proc_exit(struct net *net)
 287 {
 288         remove_proc_entry("eps", net->sctp.proc_net_sctp);
 289 }
 290
 291
 292 static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
 293 {
 294         if (*pos >= sctp_assoc_hashsize)
 295                 return NULL;
 296
 297         if (*pos < 0)
 298                 *pos = 0;
 299
 300         if (*pos == 0)
 301                 seq_printf(seq, " ASSOC     SOCK   STY SST ST HBKT "
 302                                 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
 303                                 "RPORT LADDRS <-> RADDRS "
 304                                 "HBINT INS OUTS MAXRT T1X T2X RTXC "
 305                                 "wmema wmemq sndbuf rcvbuf\n");
 306
 307         return (void *)pos;
 308 }
 309
 310 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
 311 {
 312 }
 313
 314
 315 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 316 {
 317         if (++*pos >= sctp_assoc_hashsize)
 318                 return NULL;
 319
 320         return pos;
 321 }
 322
 323 /* Display sctp associations (/proc/net/sctp/assocs). */
 324 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
 325 {
 326         struct sctp_hashbucket *head;
 327         struct sctp_ep_common *epb;
 328         struct sctp_association *assoc;
 329         struct sock *sk;
 330         int    hash = *(loff_t *)v;
 331
 332         if (hash >= sctp_assoc_hashsize)
 333                 return -ENOMEM;
 334
 335         head = &sctp_assoc_hashtable[hash];
 336         sctp_local_bh_disable();
 337         read_lock(&head->lock);
 338         sctp_for_each_hentry(epb, &head->chain) {
 339                 assoc = sctp_assoc(epb);
 340                 sk = epb->sk;
 341                 if (!net_eq(sock_net(sk), seq_file_net(seq)))
 342                         continue;
 343                 seq_printf(seq,
 344                            "%8pK %8pK %-3d %-3d %-2d %-4d "
 345                            "%4d %8d %8d %7d %5lu %-5d %5d ",
 346                            assoc, sk, sctp_sk(sk)->type, sk->sk_state,
 347                            assoc->state, hash,
 348                            assoc->assoc_id,
 349                            assoc->sndbuf_used,
 350                            atomic_read(&assoc->rmem_alloc),
 351                            from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
 352                            sock_i_ino(sk),
 353                            epb->bind_addr.port,
 354                            assoc->peer.port);
 355                 seq_printf(seq, " ");
 356                 sctp_seq_dump_local_addrs(seq, epb);
 357                 seq_printf(seq, "<-> ");
 358                 sctp_seq_dump_remote_addrs(seq, assoc);
 359                 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
 360                            "%8d %8d %8d %8d",
 361                         assoc->hbinterval, assoc->c.sinit_max_instreams,
 362                         assoc->c.sinit_num_ostreams, assoc->max_retrans,
 363                         assoc->init_retries, assoc->shutdown_retries,
 364                         assoc->rtx_data_chunks,
 365                         atomic_read(&sk->sk_wmem_alloc),
 366                         sk->sk_wmem_queued,
 367                         sk->sk_sndbuf,
 368                         sk->sk_rcvbuf);
 369                 seq_printf(seq, "\n");
 370         }
 371         read_unlock(&head->lock);
 372         sctp_local_bh_enable();
 373
 374         return 0;
 375 }
 376
 377 static const struct seq_operations sctp_assoc_ops = {
 378         .start = sctp_assocs_seq_start,
 379         .next  = sctp_assocs_seq_next,
 380         .stop  = sctp_assocs_seq_stop,
 381         .show  = sctp_assocs_seq_show,
 382 };
 383
 384 /* Initialize the seq file operations for 'assocs' object. */
 385 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
 386 {
 387         return seq_open_net(inode, file, &sctp_assoc_ops,
 388                             sizeof(struct seq_net_private));
 389 }
 390
 391 static const struct file_operations sctp_assocs_seq_fops = {
 392         .open    = sctp_assocs_seq_open,
 393         .read    = seq_read,
 394         .llseek  = seq_lseek,
 395         .release = seq_release_net,
 396 };
 397
 398 /* Set up the proc fs entry for 'assocs' object. */
 399 int __net_init sctp_assocs_proc_init(struct net *net)
 400 {
 401         struct proc_dir_entry *p;
 402
 403         p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
 404                         &sctp_assocs_seq_fops);
 405         if (!p)
 406                 return -ENOMEM;
 407
 408         return 0;
 409 }
 410
 411 /* Cleanup the proc fs entry for 'assocs' object. */
 412 void sctp_assocs_proc_exit(struct net *net)
 413 {
 414         remove_proc_entry("assocs", net->sctp.proc_net_sctp);
 415 }
 416
 417 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
 418 {
 419         if (*pos >= sctp_assoc_hashsize)
 420                 return NULL;
 421
 422         if (*pos < 0)
 423                 *pos = 0;
 424
 425         if (*pos == 0)
 426                 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
 427                                 "REM_ADDR_RTX  START\n");
 428
 429         return (void *)pos;
 430 }
 431
 432 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 433 {
 434         if (++*pos >= sctp_assoc_hashsize)
 435                 return NULL;
 436
 437         return pos;
 438 }
 439
 440 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
 441 {
 442 }
 443
 444 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
 445 {
 446         struct sctp_hashbucket *head;
 447         struct sctp_ep_common *epb;
 448         struct sctp_association *assoc;
 449         struct sctp_transport *tsp;
 450         int    hash = *(loff_t *)v;
 451
 452         if (hash >= sctp_assoc_hashsize)
 453                 return -ENOMEM;
 454
 455         head = &sctp_assoc_hashtable[hash];
 456         sctp_local_bh_disable();
 457         read_lock(&head->lock);
 458         rcu_read_lock();
 459         sctp_for_each_hentry(epb, &head->chain) {
 460                 if (!net_eq(sock_net(epb->sk), seq_file_net(seq)))
 461                         continue;
 462                 assoc = sctp_assoc(epb);
 463                 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
 464                                         transports) {
 465                         if (tsp->dead)
 466                                 continue;
 467
 468                         /*
 469                          * The remote address (ADDR)
 470                          */
 471                         tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
 472                         seq_printf(seq, " ");
 473
 474                         /*
 475                          * The association ID (ASSOC_ID)
 476                          */
 477                         seq_printf(seq, "%d ", tsp->asoc->assoc_id);
 478
 479                         /*
 480                          * If the Heartbeat is active (HB_ACT)
 481                          * Note: 1 = Active, 0 = Inactive
 482                          */
 483                         seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
 484
 485                         /*
 486                          * Retransmit time out (RTO)
 487                          */
 488                         seq_printf(seq, "%lu ", tsp->rto);
 489
 490                         /*
 491                          * Maximum path retransmit count (PATH_MAX_RTX)
 492                          */
 493                         seq_printf(seq, "%d ", tsp->pathmaxrxt);
 494
 495                         /*
 496                          * remote address retransmit count (REM_ADDR_RTX)
 497                          * Note: We don't have a way to tally this at the moment
 498                          * so lets just leave it as zero for the moment
 499                          */
 500                         seq_printf(seq, "0 ");
 501
 502                         /*
 503                          * remote address start time (START).  This is also not
 504                          * currently implemented, but we can record it with a
 505                          * jiffies marker in a subsequent patch
 506                          */
 507                         seq_printf(seq, "0");
 508
 509                         seq_printf(seq, "\n");
 510                 }
 511         }
 512
 513         rcu_read_unlock();
 514         read_unlock(&head->lock);
 515         sctp_local_bh_enable();
 516
 517         return 0;
 518
 519 }
 520
 521 static const struct seq_operations sctp_remaddr_ops = {
 522         .start = sctp_remaddr_seq_start,
 523         .next  = sctp_remaddr_seq_next,
 524         .stop  = sctp_remaddr_seq_stop,
 525         .show  = sctp_remaddr_seq_show,
 526 };
 527
 528 /* Cleanup the proc fs entry for 'remaddr' object. */
 529 void sctp_remaddr_proc_exit(struct net *net)
 530 {
 531         remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
 532 }
 533
 534 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
 535 {
 536         return seq_open_net(inode, file, &sctp_remaddr_ops,
 537                             sizeof(struct seq_net_private));
 538 }
 539
 540 static const struct file_operations sctp_remaddr_seq_fops = {
 541         .open = sctp_remaddr_seq_open,
 542         .read = seq_read,
 543         .llseek = seq_lseek,
 544         .release = seq_release_net,
 545 };
 546
 547 int __net_init sctp_remaddr_proc_init(struct net *net)
 548 {
 549         struct proc_dir_entry *p;
 550
 551         p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
 552                         &sctp_remaddr_seq_fops);
 553         if (!p)
 554                 return -ENOMEM;
 555         return 0;
 556 }