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         struct hlist_node *node;
 217         int    hash = *(loff_t *)v;
 218
 219         if (hash >= sctp_ep_hashsize)
 220                 return -ENOMEM;
 221
 222         head = &sctp_ep_hashtable[hash];
 223         sctp_local_bh_disable();
 224         read_lock(&head->lock);
 225         sctp_for_each_hentry(epb, node, &head->chain) {
 226                 ep = sctp_ep(epb);
 227                 sk = epb->sk;
 228                 if (!net_eq(sock_net(sk), seq_file_net(seq)))
 229                         continue;
 230                 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk,
 231                            sctp_sk(sk)->type, sk->sk_state, hash,
 232                            epb->bind_addr.port,
 233                            from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
 234                            sock_i_ino(sk));
 235
 236                 sctp_seq_dump_local_addrs(seq, epb);
 237                 seq_printf(seq, "\n");
 238         }
 239         read_unlock(&head->lock);
 240         sctp_local_bh_enable();
 241
 242         return 0;
 243 }
 244
 245 static const struct seq_operations sctp_eps_ops = {
 246         .start = sctp_eps_seq_start,
 247         .next  = sctp_eps_seq_next,
 248         .stop  = sctp_eps_seq_stop,
 249         .show  = sctp_eps_seq_show,
 250 };
 251
 252
 253 /* Initialize the seq file operations for 'eps' object. */
 254 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
 255 {
 256         return seq_open_net(inode, file, &sctp_eps_ops,
 257                             sizeof(struct seq_net_private));
 258 }
 259
 260 static const struct file_operations sctp_eps_seq_fops = {
 261         .open    = sctp_eps_seq_open,
 262         .read    = seq_read,
 263         .llseek  = seq_lseek,
 264         .release = seq_release_net,
 265 };
 266
 267 /* Set up the proc fs entry for 'eps' object. */
 268 int __net_init sctp_eps_proc_init(struct net *net)
 269 {
 270         struct proc_dir_entry *p;
 271
 272         p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp,
 273                         &sctp_eps_seq_fops);
 274         if (!p)
 275                 return -ENOMEM;
 276
 277         return 0;
 278 }
 279
 280 /* Cleanup the proc fs entry for 'eps' object. */
 281 void sctp_eps_proc_exit(struct net *net)
 282 {
 283         remove_proc_entry("eps", net->sctp.proc_net_sctp);
 284 }
 285
 286
 287 static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
 288 {
 289         if (*pos >= sctp_assoc_hashsize)
 290                 return NULL;
 291
 292         if (*pos < 0)
 293                 *pos = 0;
 294
 295         if (*pos == 0)
 296                 seq_printf(seq, " ASSOC     SOCK   STY SST ST HBKT "
 297                                 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
 298                                 "RPORT LADDRS <-> RADDRS "
 299                                 "HBINT INS OUTS MAXRT T1X T2X RTXC\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         struct hlist_node *node;
 325         int    hash = *(loff_t *)v;
 326
 327         if (hash >= sctp_assoc_hashsize)
 328                 return -ENOMEM;
 329
 330         head = &sctp_assoc_hashtable[hash];
 331         sctp_local_bh_disable();
 332         read_lock(&head->lock);
 333         sctp_for_each_hentry(epb, node, &head->chain) {
 334                 assoc = sctp_assoc(epb);
 335                 sk = epb->sk;
 336                 if (!net_eq(sock_net(sk), seq_file_net(seq)))
 337                         continue;
 338                 seq_printf(seq,
 339                            "%8pK %8pK %-3d %-3d %-2d %-4d "
 340                            "%4d %8d %8d %7d %5lu %-5d %5d ",
 341                            assoc, sk, sctp_sk(sk)->type, sk->sk_state,
 342                            assoc->state, hash,
 343                            assoc->assoc_id,
 344                            assoc->sndbuf_used,
 345                            atomic_read(&assoc->rmem_alloc),
 346                            from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
 347                            sock_i_ino(sk),
 348                            epb->bind_addr.port,
 349                            assoc->peer.port);
 350                 seq_printf(seq, " ");
 351                 sctp_seq_dump_local_addrs(seq, epb);
 352                 seq_printf(seq, "<-> ");
 353                 sctp_seq_dump_remote_addrs(seq, assoc);
 354                 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %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                 seq_printf(seq, "\n");
 360         }
 361         read_unlock(&head->lock);
 362         sctp_local_bh_enable();
 363
 364         return 0;
 365 }
 366
 367 static const struct seq_operations sctp_assoc_ops = {
 368         .start = sctp_assocs_seq_start,
 369         .next  = sctp_assocs_seq_next,
 370         .stop  = sctp_assocs_seq_stop,
 371         .show  = sctp_assocs_seq_show,
 372 };
 373
 374 /* Initialize the seq file operations for 'assocs' object. */
 375 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
 376 {
 377         return seq_open_net(inode, file, &sctp_assoc_ops,
 378                             sizeof(struct seq_net_private));
 379 }
 380
 381 static const struct file_operations sctp_assocs_seq_fops = {
 382         .open    = sctp_assocs_seq_open,
 383         .read    = seq_read,
 384         .llseek  = seq_lseek,
 385         .release = seq_release_net,
 386 };
 387
 388 /* Set up the proc fs entry for 'assocs' object. */
 389 int __net_init sctp_assocs_proc_init(struct net *net)
 390 {
 391         struct proc_dir_entry *p;
 392
 393         p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
 394                         &sctp_assocs_seq_fops);
 395         if (!p)
 396                 return -ENOMEM;
 397
 398         return 0;
 399 }
 400
 401 /* Cleanup the proc fs entry for 'assocs' object. */
 402 void sctp_assocs_proc_exit(struct net *net)
 403 {
 404         remove_proc_entry("assocs", net->sctp.proc_net_sctp);
 405 }
 406
 407 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
 408 {
 409         if (*pos >= sctp_assoc_hashsize)
 410                 return NULL;
 411
 412         if (*pos < 0)
 413                 *pos = 0;
 414
 415         if (*pos == 0)
 416                 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
 417                                 "REM_ADDR_RTX  START\n");
 418
 419         return (void *)pos;
 420 }
 421
 422 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 423 {
 424         if (++*pos >= sctp_assoc_hashsize)
 425                 return NULL;
 426
 427         return pos;
 428 }
 429
 430 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
 431 {
 432 }
 433
 434 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
 435 {
 436         struct sctp_hashbucket *head;
 437         struct sctp_ep_common *epb;
 438         struct sctp_association *assoc;
 439         struct hlist_node *node;
 440         struct sctp_transport *tsp;
 441         int    hash = *(loff_t *)v;
 442
 443         if (hash >= sctp_assoc_hashsize)
 444                 return -ENOMEM;
 445
 446         head = &sctp_assoc_hashtable[hash];
 447         sctp_local_bh_disable();
 448         read_lock(&head->lock);
 449         rcu_read_lock();
 450         sctp_for_each_hentry(epb, node, &head->chain) {
 451                 if (!net_eq(sock_net(epb->sk), seq_file_net(seq)))
 452                         continue;
 453                 assoc = sctp_assoc(epb);
 454                 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
 455                                         transports) {
 456                         if (tsp->dead)
 457                                 continue;
 458
 459                         /*
 460                          * The remote address (ADDR)
 461                          */
 462                         tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
 463                         seq_printf(seq, " ");
 464
 465                         /*
 466                          * The association ID (ASSOC_ID)
 467                          */
 468                         seq_printf(seq, "%d ", tsp->asoc->assoc_id);
 469
 470                         /*
 471                          * If the Heartbeat is active (HB_ACT)
 472                          * Note: 1 = Active, 0 = Inactive
 473                          */
 474                         seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
 475
 476                         /*
 477                          * Retransmit time out (RTO)
 478                          */
 479                         seq_printf(seq, "%lu ", tsp->rto);
 480
 481                         /*
 482                          * Maximum path retransmit count (PATH_MAX_RTX)
 483                          */
 484                         seq_printf(seq, "%d ", tsp->pathmaxrxt);
 485
 486                         /*
 487                          * remote address retransmit count (REM_ADDR_RTX)
 488                          * Note: We don't have a way to tally this at the moment
 489                          * so lets just leave it as zero for the moment
 490                          */
 491                         seq_printf(seq, "0 ");
 492
 493                         /*
 494                          * remote address start time (START).  This is also not
 495                          * currently implemented, but we can record it with a
 496                          * jiffies marker in a subsequent patch
 497                          */
 498                         seq_printf(seq, "0");
 499
 500                         seq_printf(seq, "\n");
 501                 }
 502         }
 503
 504         rcu_read_unlock();
 505         read_unlock(&head->lock);
 506         sctp_local_bh_enable();
 507
 508         return 0;
 509
 510 }
 511
 512 static const struct seq_operations sctp_remaddr_ops = {
 513         .start = sctp_remaddr_seq_start,
 514         .next  = sctp_remaddr_seq_next,
 515         .stop  = sctp_remaddr_seq_stop,
 516         .show  = sctp_remaddr_seq_show,
 517 };
 518
 519 /* Cleanup the proc fs entry for 'remaddr' object. */
 520 void sctp_remaddr_proc_exit(struct net *net)
 521 {
 522         remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
 523 }
 524
 525 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
 526 {
 527         return seq_open_net(inode, file, &sctp_remaddr_ops,
 528                             sizeof(struct seq_net_private));
 529 }
 530
 531 static const struct file_operations sctp_remaddr_seq_fops = {
 532         .open = sctp_remaddr_seq_open,
 533         .read = seq_read,
 534         .llseek = seq_lseek,
 535         .release = seq_release_net,
 536 };
 537
 538 int __net_init sctp_remaddr_proc_init(struct net *net)
 539 {
 540         struct proc_dir_entry *p;
 541
 542         p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
 543                         &sctp_remaddr_seq_fops);
 544         if (!p)
 545                 return -ENOMEM;
 546         return 0;
 547 }