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