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         int i;
  84
  85         for (i = 0; sctp_snmp_list[i].name != NULL; i++)
  86                 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
  87                            snmp_fold_field((void __percpu **)sctp_statistics,
  88                                       sctp_snmp_list[i].entry));
  89
  90         return 0;
  91 }
  92
  93 /* Initialize the seq file operations for 'snmp' object. */
  94 static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
  95 {
  96         return single_open(file, sctp_snmp_seq_show, NULL);
  97 }
  98
  99 static const struct file_operations sctp_snmp_seq_fops = {
 100         .owner   = THIS_MODULE,
 101         .open    = sctp_snmp_seq_open,
 102         .read    = seq_read,
 103         .llseek  = seq_lseek,
 104         .release = single_release,
 105 };
 106
 107 /* Set up the proc fs entry for 'snmp' object. */
 108 int __init sctp_snmp_proc_init(void)
 109 {
 110         struct proc_dir_entry *p;
 111
 112         p = proc_create("snmp", S_IRUGO, proc_net_sctp, &sctp_snmp_seq_fops);
 113         if (!p)
 114                 return -ENOMEM;
 115
 116         return 0;
 117 }
 118
 119 /* Cleanup the proc fs entry for 'snmp' object. */
 120 void sctp_snmp_proc_exit(void)
 121 {
 122         remove_proc_entry("snmp", proc_net_sctp);
 123 }
 124
 125 /* Dump local addresses of an association/endpoint. */
 126 static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
 127 {
 128         struct sctp_association *asoc;
 129         struct sctp_sockaddr_entry *laddr;
 130         struct sctp_transport *peer;
 131         union sctp_addr *addr, *primary = NULL;
 132         struct sctp_af *af;
 133
 134         if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
 135             asoc = sctp_assoc(epb);
 136             peer = asoc->peer.primary_path;
 137             primary = &peer->saddr;
 138         }
 139
 140         list_for_each_entry(laddr, &epb->bind_addr.address_list, list) {
 141                 addr = &laddr->a;
 142                 af = sctp_get_af_specific(addr->sa.sa_family);
 143                 if (primary && af->cmp_addr(addr, primary)) {
 144                         seq_printf(seq, "*");
 145                 }
 146                 af->seq_dump_addr(seq, addr);
 147         }
 148 }
 149
 150 /* Dump remote addresses of an association. */
 151 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
 152 {
 153         struct sctp_transport *transport;
 154         union sctp_addr *addr, *primary;
 155         struct sctp_af *af;
 156
 157         primary = &assoc->peer.primary_addr;
 158         list_for_each_entry(transport, &assoc->peer.transport_addr_list,
 159                         transports) {
 160                 addr = &transport->ipaddr;
 161                 af = sctp_get_af_specific(addr->sa.sa_family);
 162                 if (af->cmp_addr(addr, primary)) {
 163                         seq_printf(seq, "*");
 164                 }
 165                 af->seq_dump_addr(seq, addr);
 166         }
 167 }
 168
 169 static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
 170 {
 171         if (*pos >= sctp_ep_hashsize)
 172                 return NULL;
 173
 174         if (*pos < 0)
 175                 *pos = 0;
 176
 177         if (*pos == 0)
 178                 seq_printf(seq, " ENDPT     SOCK   STY SST HBKT LPORT   UID INODE LADDRS\n");
 179
 180         return (void *)pos;
 181 }
 182
 183 static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
 184 {
 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, "%8pK %8pK %-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 }
 290
 291
 292 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 293 {
 294         if (++*pos >= sctp_assoc_hashsize)
 295                 return NULL;
 296
 297         return pos;
 298 }
 299
 300 /* Display sctp associations (/proc/net/sctp/assocs). */
 301 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
 302 {
 303         struct sctp_hashbucket *head;
 304         struct sctp_ep_common *epb;
 305         struct sctp_association *assoc;
 306         struct sock *sk;
 307         struct hlist_node *node;
 308         int    hash = *(loff_t *)v;
 309
 310         if (hash >= sctp_assoc_hashsize)
 311                 return -ENOMEM;
 312
 313         head = &sctp_assoc_hashtable[hash];
 314         sctp_local_bh_disable();
 315         read_lock(&head->lock);
 316         sctp_for_each_hentry(epb, node, &head->chain) {
 317                 assoc = sctp_assoc(epb);
 318                 sk = epb->sk;
 319                 seq_printf(seq,
 320                            "%8pK %8pK %-3d %-3d %-2d %-4d "
 321                            "%4d %8d %8d %7d %5lu %-5d %5d ",
 322                            assoc, sk, sctp_sk(sk)->type, sk->sk_state,
 323                            assoc->state, hash,
 324                            assoc->assoc_id,
 325                            assoc->sndbuf_used,
 326                            atomic_read(&assoc->rmem_alloc),
 327                            sock_i_uid(sk), sock_i_ino(sk),
 328                            epb->bind_addr.port,
 329                            assoc->peer.port);
 330                 seq_printf(seq, " ");
 331                 sctp_seq_dump_local_addrs(seq, epb);
 332                 seq_printf(seq, "<-> ");
 333                 sctp_seq_dump_remote_addrs(seq, assoc);
 334                 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d ",
 335                         assoc->hbinterval, assoc->c.sinit_max_instreams,
 336                         assoc->c.sinit_num_ostreams, assoc->max_retrans,
 337                         assoc->init_retries, assoc->shutdown_retries,
 338                         assoc->rtx_data_chunks);
 339                 seq_printf(seq, "\n");
 340         }
 341         read_unlock(&head->lock);
 342         sctp_local_bh_enable();
 343
 344         return 0;
 345 }
 346
 347 static const struct seq_operations sctp_assoc_ops = {
 348         .start = sctp_assocs_seq_start,
 349         .next  = sctp_assocs_seq_next,
 350         .stop  = sctp_assocs_seq_stop,
 351         .show  = sctp_assocs_seq_show,
 352 };
 353
 354 /* Initialize the seq file operations for 'assocs' object. */
 355 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
 356 {
 357         return seq_open(file, &sctp_assoc_ops);
 358 }
 359
 360 static const struct file_operations sctp_assocs_seq_fops = {
 361         .open    = sctp_assocs_seq_open,
 362         .read    = seq_read,
 363         .llseek  = seq_lseek,
 364         .release = seq_release,
 365 };
 366
 367 /* Set up the proc fs entry for 'assocs' object. */
 368 int __init sctp_assocs_proc_init(void)
 369 {
 370         struct proc_dir_entry *p;
 371
 372         p = proc_create("assocs", S_IRUGO, proc_net_sctp,
 373                         &sctp_assocs_seq_fops);
 374         if (!p)
 375                 return -ENOMEM;
 376
 377         return 0;
 378 }
 379
 380 /* Cleanup the proc fs entry for 'assocs' object. */
 381 void sctp_assocs_proc_exit(void)
 382 {
 383         remove_proc_entry("assocs", proc_net_sctp);
 384 }
 385
 386 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
 387 {
 388         if (*pos >= sctp_assoc_hashsize)
 389                 return NULL;
 390
 391         if (*pos < 0)
 392                 *pos = 0;
 393
 394         if (*pos == 0)
 395                 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
 396                                 "REM_ADDR_RTX  START\n");
 397
 398         return (void *)pos;
 399 }
 400
 401 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 402 {
 403         if (++*pos >= sctp_assoc_hashsize)
 404                 return NULL;
 405
 406         return pos;
 407 }
 408
 409 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
 410 {
 411 }
 412
 413 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
 414 {
 415         struct sctp_hashbucket *head;
 416         struct sctp_ep_common *epb;
 417         struct sctp_association *assoc;
 418         struct hlist_node *node;
 419         struct sctp_transport *tsp;
 420         int    hash = *(loff_t *)v;
 421
 422         if (hash >= sctp_assoc_hashsize)
 423                 return -ENOMEM;
 424
 425         head = &sctp_assoc_hashtable[hash];
 426         sctp_local_bh_disable();
 427         read_lock(&head->lock);
 428         sctp_for_each_hentry(epb, node, &head->chain) {
 429                 assoc = sctp_assoc(epb);
 430                 list_for_each_entry(tsp, &assoc->peer.transport_addr_list,
 431                                         transports) {
 432                         /*
 433                          * The remote address (ADDR)
 434                          */
 435                         tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
 436                         seq_printf(seq, " ");
 437
 438                         /*
 439                          * The association ID (ASSOC_ID)
 440                          */
 441                         seq_printf(seq, "%d ", tsp->asoc->assoc_id);
 442
 443                         /*
 444                          * If the Heartbeat is active (HB_ACT)
 445                          * Note: 1 = Active, 0 = Inactive
 446                          */
 447                         seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
 448
 449                         /*
 450                          * Retransmit time out (RTO)
 451                          */
 452                         seq_printf(seq, "%lu ", tsp->rto);
 453
 454                         /*
 455                          * Maximum path retransmit count (PATH_MAX_RTX)
 456                          */
 457                         seq_printf(seq, "%d ", tsp->pathmaxrxt);
 458
 459                         /*
 460                          * remote address retransmit count (REM_ADDR_RTX)
 461                          * Note: We don't have a way to tally this at the moment
 462                          * so lets just leave it as zero for the moment
 463                          */
 464                         seq_printf(seq, "0 ");
 465
 466                         /*
 467                          * remote address start time (START).  This is also not
 468                          * currently implemented, but we can record it with a
 469                          * jiffies marker in a subsequent patch
 470                          */
 471                         seq_printf(seq, "0");
 472
 473                         seq_printf(seq, "\n");
 474                 }
 475         }
 476
 477         read_unlock(&head->lock);
 478         sctp_local_bh_enable();
 479
 480         return 0;
 481
 482 }
 483
 484 static const struct seq_operations sctp_remaddr_ops = {
 485         .start = sctp_remaddr_seq_start,
 486         .next  = sctp_remaddr_seq_next,
 487         .stop  = sctp_remaddr_seq_stop,
 488         .show  = sctp_remaddr_seq_show,
 489 };
 490
 491 /* Cleanup the proc fs entry for 'remaddr' object. */
 492 void sctp_remaddr_proc_exit(void)
 493 {
 494         remove_proc_entry("remaddr", proc_net_sctp);
 495 }
 496
 497 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
 498 {
 499         return seq_open(file, &sctp_remaddr_ops);
 500 }
 501
 502 static const struct file_operations sctp_remaddr_seq_fops = {
 503         .open = sctp_remaddr_seq_open,
 504         .read = seq_read,
 505         .llseek = seq_lseek,
 506         .release = seq_release,
 507 };
 508
 509 int __init sctp_remaddr_proc_init(void)
 510 {
 511         struct proc_dir_entry *p;
 512
 513         p = proc_create("remaddr", S_IRUGO, proc_net_sctp, &sctp_remaddr_seq_fops);
 514         if (!p)
 515                 return -ENOMEM;
 516         return 0;
 517 }