linux/net/sctp/proc.c
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   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
  44static 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). */
  81static 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. */
  95static 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
 100static 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. */
 109int __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. */
 122void 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. */
 128static 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. */
 158static 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
 181static 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
 195static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
 196{
 197}
 198
 199
 200static 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). */
 210static 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
 245static 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. */
 254static 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
 260static 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. */
 268int __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. */
 281void sctp_eps_proc_exit(struct net *net)
 282{
 283        remove_proc_entry("eps", net->sctp.proc_net_sctp);
 284}
 285
 286
 287static 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
 304static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
 305{
 306}
 307
 308
 309static 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). */
 318static 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
 367static 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. */
 375static 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
 381static 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. */
 389int __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. */
 402void sctp_assocs_proc_exit(struct net *net)
 403{
 404        remove_proc_entry("assocs", net->sctp.proc_net_sctp);
 405}
 406
 407static 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
 422static 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
 430static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
 431{
 432}
 433
 434static 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
 512static 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. */
 520void sctp_remaddr_proc_exit(struct net *net)
 521{
 522        remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
 523}
 524
 525static 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
 531static 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
 538int __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}
 548
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