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             peer = asoc->peer.primary_path;
 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 %5d %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\n");
 299
 300         return (void *)pos;
 301 }
 302
 303 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
 304 {
 305 }
 306
 307
 308 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 309 {
 310         if (++*pos >= sctp_assoc_hashsize)
 311                 return NULL;
 312
 313         return pos;
 314 }
 315
 316 /* Display sctp associations (/proc/net/sctp/assocs). */
 317 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
 318 {
 319         struct sctp_hashbucket *head;
 320         struct sctp_ep_common *epb;
 321         struct sctp_association *assoc;
 322         struct sock *sk;
 323         int    hash = *(loff_t *)v;
 324
 325         if (hash >= sctp_assoc_hashsize)
 326                 return -ENOMEM;
 327
 328         head = &sctp_assoc_hashtable[hash];
 329         sctp_local_bh_disable();
 330         read_lock(&head->lock);
 331         sctp_for_each_hentry(epb, &head->chain) {
 332                 assoc = sctp_assoc(epb);
 333                 sk = epb->sk;
 334                 if (!net_eq(sock_net(sk), seq_file_net(seq)))
 335                         continue;
 336                 seq_printf(seq,
 337                            "%8pK %8pK %-3d %-3d %-2d %-4d "
 338                            "%4d %8d %8d %7d %5lu %-5d %5d ",
 339                            assoc, sk, sctp_sk(sk)->type, sk->sk_state,
 340                            assoc->state, hash,
 341                            assoc->assoc_id,
 342                            assoc->sndbuf_used,
 343                            atomic_read(&assoc->rmem_alloc),
 344                            from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
 345                            sock_i_ino(sk),
 346                            epb->bind_addr.port,
 347                            assoc->peer.port);
 348                 seq_printf(seq, " ");
 349                 sctp_seq_dump_local_addrs(seq, epb);
 350                 seq_printf(seq, "<-> ");
 351                 sctp_seq_dump_remote_addrs(seq, assoc);
 352                 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d ",
 353                         assoc->hbinterval, assoc->c.sinit_max_instreams,
 354                         assoc->c.sinit_num_ostreams, assoc->max_retrans,
 355                         assoc->init_retries, assoc->shutdown_retries,
 356                         assoc->rtx_data_chunks);
 357                 seq_printf(seq, "\n");
 358         }
 359         read_unlock(&head->lock);
 360         sctp_local_bh_enable();
 361
 362         return 0;
 363 }
 364
 365 static const struct seq_operations sctp_assoc_ops = {
 366         .start = sctp_assocs_seq_start,
 367         .next  = sctp_assocs_seq_next,
 368         .stop  = sctp_assocs_seq_stop,
 369         .show  = sctp_assocs_seq_show,
 370 };
 371
 372 /* Initialize the seq file operations for 'assocs' object. */
 373 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
 374 {
 375         return seq_open_net(inode, file, &sctp_assoc_ops,
 376                             sizeof(struct seq_net_private));
 377 }
 378
 379 static const struct file_operations sctp_assocs_seq_fops = {
 380         .open    = sctp_assocs_seq_open,
 381         .read    = seq_read,
 382         .llseek  = seq_lseek,
 383         .release = seq_release_net,
 384 };
 385
 386 /* Set up the proc fs entry for 'assocs' object. */
 387 int __net_init sctp_assocs_proc_init(struct net *net)
 388 {
 389         struct proc_dir_entry *p;
 390
 391         p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
 392                         &sctp_assocs_seq_fops);
 393         if (!p)
 394                 return -ENOMEM;
 395
 396         return 0;
 397 }
 398
 399 /* Cleanup the proc fs entry for 'assocs' object. */
 400 void sctp_assocs_proc_exit(struct net *net)
 401 {
 402         remove_proc_entry("assocs", net->sctp.proc_net_sctp);
 403 }
 404
 405 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
 406 {
 407         if (*pos >= sctp_assoc_hashsize)
 408                 return NULL;
 409
 410         if (*pos < 0)
 411                 *pos = 0;
 412
 413         if (*pos == 0)
 414                 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
 415                                 "REM_ADDR_RTX  START\n");
 416
 417         return (void *)pos;
 418 }
 419
 420 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 421 {
 422         if (++*pos >= sctp_assoc_hashsize)
 423                 return NULL;
 424
 425         return pos;
 426 }
 427
 428 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
 429 {
 430 }
 431
 432 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
 433 {
 434         struct sctp_hashbucket *head;
 435         struct sctp_ep_common *epb;
 436         struct sctp_association *assoc;
 437         struct sctp_transport *tsp;
 438         int    hash = *(loff_t *)v;
 439
 440         if (hash >= sctp_assoc_hashsize)
 441                 return -ENOMEM;
 442
 443         head = &sctp_assoc_hashtable[hash];
 444         sctp_local_bh_disable();
 445         read_lock(&head->lock);
 446         rcu_read_lock();
 447         sctp_for_each_hentry(epb, &head->chain) {
 448                 if (!net_eq(sock_net(epb->sk), seq_file_net(seq)))
 449                         continue;
 450                 assoc = sctp_assoc(epb);
 451                 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
 452                                         transports) {
 453                         if (tsp->dead)
 454                                 continue;
 455
 456                         /*
 457                          * The remote address (ADDR)
 458                          */
 459                         tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
 460                         seq_printf(seq, " ");
 461
 462                         /*
 463                          * The association ID (ASSOC_ID)
 464                          */
 465                         seq_printf(seq, "%d ", tsp->asoc->assoc_id);
 466
 467                         /*
 468                          * If the Heartbeat is active (HB_ACT)
 469                          * Note: 1 = Active, 0 = Inactive
 470                          */
 471                         seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
 472
 473                         /*
 474                          * Retransmit time out (RTO)
 475                          */
 476                         seq_printf(seq, "%lu ", tsp->rto);
 477
 478                         /*
 479                          * Maximum path retransmit count (PATH_MAX_RTX)
 480                          */
 481                         seq_printf(seq, "%d ", tsp->pathmaxrxt);
 482
 483                         /*
 484                          * remote address retransmit count (REM_ADDR_RTX)
 485                          * Note: We don't have a way to tally this at the moment
 486                          * so lets just leave it as zero for the moment
 487                          */
 488                         seq_printf(seq, "0 ");
 489
 490                         /*
 491                          * remote address start time (START).  This is also not
 492                          * currently implemented, but we can record it with a
 493                          * jiffies marker in a subsequent patch
 494                          */
 495                         seq_printf(seq, "0");
 496
 497                         seq_printf(seq, "\n");
 498                 }
 499         }
 500
 501         rcu_read_unlock();
 502         read_unlock(&head->lock);
 503         sctp_local_bh_enable();
 504
 505         return 0;
 506
 507 }
 508
 509 static const struct seq_operations sctp_remaddr_ops = {
 510         .start = sctp_remaddr_seq_start,
 511         .next  = sctp_remaddr_seq_next,
 512         .stop  = sctp_remaddr_seq_stop,
 513         .show  = sctp_remaddr_seq_show,
 514 };
 515
 516 /* Cleanup the proc fs entry for 'remaddr' object. */
 517 void sctp_remaddr_proc_exit(struct net *net)
 518 {
 519         remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
 520 }
 521
 522 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
 523 {
 524         return seq_open_net(inode, file, &sctp_remaddr_ops,
 525                             sizeof(struct seq_net_private));
 526 }
 527
 528 static const struct file_operations sctp_remaddr_seq_fops = {
 529         .open = sctp_remaddr_seq_open,
 530         .read = seq_read,
 531         .llseek = seq_lseek,
 532         .release = seq_release_net,
 533 };
 534
 535 int __net_init sctp_remaddr_proc_init(struct net *net)
 536 {
 537         struct proc_dir_entry *p;
 538
 539         p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
 540                         &sctp_remaddr_seq_fops);
 541         if (!p)
 542                 return -ENOMEM;
 543         return 0;
 544 }