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 <net/sctp/sctp.h>
  41 #include <net/ip.h> /* for snmp_fold_field */
  42
  43 static struct snmp_mib sctp_snmp_list[] = {
  44         SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB),
  45         SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS),
  46         SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS),
  47         SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS),
  48         SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS),
  49         SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES),
  50         SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS),
  51         SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS),
  52         SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS),
  53         SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS),
  54         SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS),
  55         SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS),
  56         SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS),
  57         SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS),
  58         SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS),
  59         SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS),
  60         SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS),
  61         SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
  62         SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
  63         SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
  64         SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
  65         SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
  66         SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
  67         SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
  68         SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
  69         SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
  70         SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
  71         SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
  72         SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
  73         SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
  74         SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
  75         SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
  76         SNMP_MIB_SENTINEL
  77 };
  78
  79 /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
  80 static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
  81 {
  82         int i;
  83
  84         for (i = 0; sctp_snmp_list[i].name != NULL; i++)
  85                 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
  86                            snmp_fold_field((void **)sctp_statistics,
  87                                       sctp_snmp_list[i].entry));
  88
  89         return 0;
  90 }
  91
  92 /* Initialize the seq file operations for 'snmp' object. */
  93 static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
  94 {
  95         return single_open(file, sctp_snmp_seq_show, NULL);
  96 }
  97
  98 static const struct file_operations sctp_snmp_seq_fops = {
  99         .owner   = THIS_MODULE,
 100         .open    = sctp_snmp_seq_open,
 101         .read    = seq_read,
 102         .llseek  = seq_lseek,
 103         .release = single_release,
 104 };
 105
 106 /* Set up the proc fs entry for 'snmp' object. */
 107 int __init sctp_snmp_proc_init(void)
 108 {
 109         struct proc_dir_entry *p;
 110
 111         p = proc_create("snmp", S_IRUGO, proc_net_sctp, &sctp_snmp_seq_fops);
 112         if (!p)
 113                 return -ENOMEM;
 114
 115         return 0;
 116 }
 117
 118 /* Cleanup the proc fs entry for 'snmp' object. */
 119 void sctp_snmp_proc_exit(void)
 120 {
 121         remove_proc_entry("snmp", proc_net_sctp);
 122 }
 123
 124 /* Dump local addresses of an association/endpoint. */
 125 static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
 126 {
 127         struct sctp_association *asoc;
 128         struct sctp_sockaddr_entry *laddr;
 129         struct sctp_transport *peer;
 130         union sctp_addr *addr, *primary = NULL;
 131         struct sctp_af *af;
 132
 133         if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
 134             asoc = sctp_assoc(epb);
 135             peer = asoc->peer.primary_path;
 136             primary = &peer->saddr;
 137         }
 138
 139         list_for_each_entry(laddr, &epb->bind_addr.address_list, list) {
 140                 addr = &laddr->a;
 141                 af = sctp_get_af_specific(addr->sa.sa_family);
 142                 if (primary && af->cmp_addr(addr, primary)) {
 143                         seq_printf(seq, "*");
 144                 }
 145                 af->seq_dump_addr(seq, addr);
 146         }
 147 }
 148
 149 /* Dump remote addresses of an association. */
 150 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
 151 {
 152         struct sctp_transport *transport;
 153         union sctp_addr *addr, *primary;
 154         struct sctp_af *af;
 155
 156         primary = &assoc->peer.primary_addr;
 157         list_for_each_entry(transport, &assoc->peer.transport_addr_list,
 158                         transports) {
 159                 addr = &transport->ipaddr;
 160                 af = sctp_get_af_specific(addr->sa.sa_family);
 161                 if (af->cmp_addr(addr, primary)) {
 162                         seq_printf(seq, "*");
 163                 }
 164                 af->seq_dump_addr(seq, addr);
 165         }
 166 }
 167
 168 static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
 169 {
 170         if (*pos >= sctp_ep_hashsize)
 171                 return NULL;
 172
 173         if (*pos < 0)
 174                 *pos = 0;
 175
 176         if (*pos == 0)
 177                 seq_printf(seq, " ENDPT     SOCK   STY SST HBKT LPORT   UID INODE LADDRS\n");
 178
 179         return (void *)pos;
 180 }
 181
 182 static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
 183 {
 184         return;
 185 }
 186
 187
 188 static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 189 {
 190         if (++*pos >= sctp_ep_hashsize)
 191                 return NULL;
 192
 193         return pos;
 194 }
 195
 196
 197 /* Display sctp endpoints (/proc/net/sctp/eps). */
 198 static int sctp_eps_seq_show(struct seq_file *seq, void *v)
 199 {
 200         struct sctp_hashbucket *head;
 201         struct sctp_ep_common *epb;
 202         struct sctp_endpoint *ep;
 203         struct sock *sk;
 204         struct hlist_node *node;
 205         int    hash = *(loff_t *)v;
 206
 207         if (hash >= sctp_ep_hashsize)
 208                 return -ENOMEM;
 209
 210         head = &sctp_ep_hashtable[hash];
 211         sctp_local_bh_disable();
 212         read_lock(&head->lock);
 213         sctp_for_each_hentry(epb, node, &head->chain) {
 214                 ep = sctp_ep(epb);
 215                 sk = epb->sk;
 216                 seq_printf(seq, "%8p %8p %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk,
 217                            sctp_sk(sk)->type, sk->sk_state, hash,
 218                            epb->bind_addr.port,
 219                            sock_i_uid(sk), sock_i_ino(sk));
 220
 221                 sctp_seq_dump_local_addrs(seq, epb);
 222                 seq_printf(seq, "\n");
 223         }
 224         read_unlock(&head->lock);
 225         sctp_local_bh_enable();
 226
 227         return 0;
 228 }
 229
 230 static const struct seq_operations sctp_eps_ops = {
 231         .start = sctp_eps_seq_start,
 232         .next  = sctp_eps_seq_next,
 233         .stop  = sctp_eps_seq_stop,
 234         .show  = sctp_eps_seq_show,
 235 };
 236
 237
 238 /* Initialize the seq file operations for 'eps' object. */
 239 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
 240 {
 241         return seq_open(file, &sctp_eps_ops);
 242 }
 243
 244 static const struct file_operations sctp_eps_seq_fops = {
 245         .open    = sctp_eps_seq_open,
 246         .read    = seq_read,
 247         .llseek  = seq_lseek,
 248         .release = seq_release,
 249 };
 250
 251 /* Set up the proc fs entry for 'eps' object. */
 252 int __init sctp_eps_proc_init(void)
 253 {
 254         struct proc_dir_entry *p;
 255
 256         p = proc_create("eps", S_IRUGO, proc_net_sctp, &sctp_eps_seq_fops);
 257         if (!p)
 258                 return -ENOMEM;
 259
 260         return 0;
 261 }
 262
 263 /* Cleanup the proc fs entry for 'eps' object. */
 264 void sctp_eps_proc_exit(void)
 265 {
 266         remove_proc_entry("eps", proc_net_sctp);
 267 }
 268
 269
 270 static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
 271 {
 272         if (*pos >= sctp_assoc_hashsize)
 273                 return NULL;
 274
 275         if (*pos < 0)
 276                 *pos = 0;
 277
 278         if (*pos == 0)
 279                 seq_printf(seq, " ASSOC     SOCK   STY SST ST HBKT "
 280                                 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
 281                                 "RPORT LADDRS <-> RADDRS "
 282                                 "HBINT INS OUTS MAXRT T1X T2X RTXC\n");
 283
 284         return (void *)pos;
 285 }
 286
 287 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
 288 {
 289         return;
 290 }
 291
 292
 293 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 294 {
 295         if (++*pos >= sctp_assoc_hashsize)
 296                 return NULL;
 297
 298         return pos;
 299 }
 300
 301 /* Display sctp associations (/proc/net/sctp/assocs). */
 302 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
 303 {
 304         struct sctp_hashbucket *head;
 305         struct sctp_ep_common *epb;
 306         struct sctp_association *assoc;
 307         struct sock *sk;
 308         struct hlist_node *node;
 309         int    hash = *(loff_t *)v;
 310
 311         if (hash >= sctp_assoc_hashsize)
 312                 return -ENOMEM;
 313
 314         head = &sctp_assoc_hashtable[hash];
 315         sctp_local_bh_disable();
 316         read_lock(&head->lock);
 317         sctp_for_each_hentry(epb, node, &head->chain) {
 318                 assoc = sctp_assoc(epb);
 319                 sk = epb->sk;
 320                 seq_printf(seq,
 321                            "%8p %8p %-3d %-3d %-2d %-4d "
 322                            "%4d %8d %8d %7d %5lu %-5d %5d ",
 323                            assoc, sk, sctp_sk(sk)->type, sk->sk_state,
 324                            assoc->state, hash,
 325                            assoc->assoc_id,
 326                            assoc->sndbuf_used,
 327                            atomic_read(&assoc->rmem_alloc),
 328                            sock_i_uid(sk), sock_i_ino(sk),
 329                            epb->bind_addr.port,
 330                            assoc->peer.port);
 331                 seq_printf(seq, " ");
 332                 sctp_seq_dump_local_addrs(seq, epb);
 333                 seq_printf(seq, "<-> ");
 334                 sctp_seq_dump_remote_addrs(seq, assoc);
 335                 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d ",
 336                         assoc->hbinterval, assoc->c.sinit_max_instreams,
 337                         assoc->c.sinit_num_ostreams, assoc->max_retrans,
 338                         assoc->init_retries, assoc->shutdown_retries,
 339                         assoc->rtx_data_chunks);
 340                 seq_printf(seq, "\n");
 341         }
 342         read_unlock(&head->lock);
 343         sctp_local_bh_enable();
 344
 345         return 0;
 346 }
 347
 348 static const struct seq_operations sctp_assoc_ops = {
 349         .start = sctp_assocs_seq_start,
 350         .next  = sctp_assocs_seq_next,
 351         .stop  = sctp_assocs_seq_stop,
 352         .show  = sctp_assocs_seq_show,
 353 };
 354
 355 /* Initialize the seq file operations for 'assocs' object. */
 356 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
 357 {
 358         return seq_open(file, &sctp_assoc_ops);
 359 }
 360
 361 static const struct file_operations sctp_assocs_seq_fops = {
 362         .open    = sctp_assocs_seq_open,
 363         .read    = seq_read,
 364         .llseek  = seq_lseek,
 365         .release = seq_release,
 366 };
 367
 368 /* Set up the proc fs entry for 'assocs' object. */
 369 int __init sctp_assocs_proc_init(void)
 370 {
 371         struct proc_dir_entry *p;
 372
 373         p = proc_create("assocs", S_IRUGO, proc_net_sctp,
 374                         &sctp_assocs_seq_fops);
 375         if (!p)
 376                 return -ENOMEM;
 377
 378         return 0;
 379 }
 380
 381 /* Cleanup the proc fs entry for 'assocs' object. */
 382 void sctp_assocs_proc_exit(void)
 383 {
 384         remove_proc_entry("assocs", proc_net_sctp);
 385 }
 386
 387 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
 388 {
 389         if (*pos >= sctp_assoc_hashsize)
 390                 return NULL;
 391
 392         if (*pos < 0)
 393                 *pos = 0;
 394
 395         if (*pos == 0)
 396                 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
 397                                 "REM_ADDR_RTX  START\n");
 398
 399         return (void *)pos;
 400 }
 401
 402 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 403 {
 404         if (++*pos >= sctp_assoc_hashsize)
 405                 return NULL;
 406
 407         return pos;
 408 }
 409
 410 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
 411 {
 412         return;
 413 }
 414
 415 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
 416 {
 417         struct sctp_hashbucket *head;
 418         struct sctp_ep_common *epb;
 419         struct sctp_association *assoc;
 420         struct hlist_node *node;
 421         struct sctp_transport *tsp;
 422         int    hash = *(loff_t *)v;
 423
 424         if (hash >= sctp_assoc_hashsize)
 425                 return -ENOMEM;
 426
 427         head = &sctp_assoc_hashtable[hash];
 428         sctp_local_bh_disable();
 429         read_lock(&head->lock);
 430         sctp_for_each_hentry(epb, node, &head->chain) {
 431                 assoc = sctp_assoc(epb);
 432                 list_for_each_entry(tsp, &assoc->peer.transport_addr_list,
 433                                         transports) {
 434                         /*
 435                          * The remote address (ADDR)
 436                          */
 437                         tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
 438                         seq_printf(seq, " ");
 439
 440                         /*
 441                          * The association ID (ASSOC_ID)
 442                          */
 443                         seq_printf(seq, "%d ", tsp->asoc->assoc_id);
 444
 445                         /*
 446                          * If the Heartbeat is active (HB_ACT)
 447                          * Note: 1 = Active, 0 = Inactive
 448                          */
 449                         seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
 450
 451                         /*
 452                          * Retransmit time out (RTO)
 453                          */
 454                         seq_printf(seq, "%lu ", tsp->rto);
 455
 456                         /*
 457                          * Maximum path retransmit count (PATH_MAX_RTX)
 458                          */
 459                         seq_printf(seq, "%d ", tsp->pathmaxrxt);
 460
 461                         /*
 462                          * remote address retransmit count (REM_ADDR_RTX)
 463                          * Note: We don't have a way to tally this at the moment
 464                          * so lets just leave it as zero for the moment
 465                          */
 466                         seq_printf(seq, "0 ");
 467
 468                         /*
 469                          * remote address start time (START).  This is also not
 470                          * currently implemented, but we can record it with a
 471                          * jiffies marker in a subsequent patch
 472                          */
 473                         seq_printf(seq, "0");
 474
 475                         seq_printf(seq, "\n");
 476                 }
 477         }
 478
 479         read_unlock(&head->lock);
 480         sctp_local_bh_enable();
 481
 482         return 0;
 483
 484 }
 485
 486 static const struct seq_operations sctp_remaddr_ops = {
 487         .start = sctp_remaddr_seq_start,
 488         .next  = sctp_remaddr_seq_next,
 489         .stop  = sctp_remaddr_seq_stop,
 490         .show  = sctp_remaddr_seq_show,
 491 };
 492
 493 /* Cleanup the proc fs entry for 'remaddr' object. */
 494 void sctp_remaddr_proc_exit(void)
 495 {
 496         remove_proc_entry("remaddr", proc_net_sctp);
 497 }
 498
 499 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
 500 {
 501         return seq_open(file, &sctp_remaddr_ops);
 502 }
 503
 504 static const struct file_operations sctp_remaddr_seq_fops = {
 505         .open = sctp_remaddr_seq_open,
 506         .read = seq_read,
 507         .llseek = seq_lseek,
 508         .release = seq_release,
 509 };
 510
 511 int __init sctp_remaddr_proc_init(void)
 512 {
 513         struct proc_dir_entry *p;
 514
 515         p = create_proc_entry("remaddr", S_IRUGO, proc_net_sctp);
 516         if (!p)
 517                 return -ENOMEM;
 518         p->proc_fops = &sctp_remaddr_seq_fops;
 519
 520         return 0;
 521 }