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