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TOMOYO Linux Cross Reference
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, see
 20  * <http://www.gnu.org/licenses/>.
 21  *
 22  * Please send any bug reports or fixes you make to the
 23  * email address(es):
 24  *    lksctp developers <linux-sctp@vger.kernel.org>
 25  *
 26  * Written or modified by:
 27  *    Sridhar Samudrala <sri@us.ibm.com>
 28  */
 29 
 30 #include <linux/types.h>
 31 #include <linux/seq_file.h>
 32 #include <linux/init.h>
 33 #include <linux/export.h>
 34 #include <net/sctp/sctp.h>
 35 #include <net/ip.h> /* for snmp_fold_field */
 36 
 37 static const struct snmp_mib sctp_snmp_list[] = {
 38         SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB),
 39         SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS),
 40         SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS),
 41         SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS),
 42         SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS),
 43         SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES),
 44         SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS),
 45         SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS),
 46         SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS),
 47         SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS),
 48         SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS),
 49         SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS),
 50         SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS),
 51         SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS),
 52         SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS),
 53         SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS),
 54         SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS),
 55         SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
 56         SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
 57         SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
 58         SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
 59         SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
 60         SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
 61         SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
 62         SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
 63         SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
 64         SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
 65         SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
 66         SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
 67         SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
 68         SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
 69         SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
 70         SNMP_MIB_SENTINEL
 71 };
 72 
 73 /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
 74 static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
 75 {
 76         struct net *net = seq->private;
 77         int i;
 78 
 79         for (i = 0; sctp_snmp_list[i].name != NULL; i++)
 80                 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
 81                            snmp_fold_field(net->sctp.sctp_statistics,
 82                                       sctp_snmp_list[i].entry));
 83 
 84         return 0;
 85 }
 86 
 87 /* Initialize the seq file operations for 'snmp' object. */
 88 static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
 89 {
 90         return single_open_net(inode, file, sctp_snmp_seq_show);
 91 }
 92 
 93 static const struct file_operations sctp_snmp_seq_fops = {
 94         .owner   = THIS_MODULE,
 95         .open    = sctp_snmp_seq_open,
 96         .read    = seq_read,
 97         .llseek  = seq_lseek,
 98         .release = single_release_net,
 99 };
100 
101 /* Set up the proc fs entry for 'snmp' object. */
102 int __net_init sctp_snmp_proc_init(struct net *net)
103 {
104         struct proc_dir_entry *p;
105 
106         p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp,
107                         &sctp_snmp_seq_fops);
108         if (!p)
109                 return -ENOMEM;
110 
111         return 0;
112 }
113 
114 /* Cleanup the proc fs entry for 'snmp' object. */
115 void sctp_snmp_proc_exit(struct net *net)
116 {
117         remove_proc_entry("snmp", net->sctp.proc_net_sctp);
118 }
119 
120 /* Dump local addresses of an association/endpoint. */
121 static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
122 {
123         struct sctp_association *asoc;
124         struct sctp_sockaddr_entry *laddr;
125         struct sctp_transport *peer;
126         union sctp_addr *addr, *primary = NULL;
127         struct sctp_af *af;
128 
129         if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
130                 asoc = sctp_assoc(epb);
131 
132                 peer = asoc->peer.primary_path;
133                 if (unlikely(peer == NULL)) {
134                         WARN(1, "Association %p with NULL primary path!\n", asoc);
135                         return;
136                 }
137 
138                 primary = &peer->saddr;
139         }
140 
141         rcu_read_lock();
142         list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
143                 if (!laddr->valid)
144                         continue;
145 
146                 addr = &laddr->a;
147                 af = sctp_get_af_specific(addr->sa.sa_family);
148                 if (primary && af->cmp_addr(addr, primary)) {
149                         seq_printf(seq, "*");
150                 }
151                 af->seq_dump_addr(seq, addr);
152         }
153         rcu_read_unlock();
154 }
155 
156 /* Dump remote addresses of an association. */
157 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
158 {
159         struct sctp_transport *transport;
160         union sctp_addr *addr, *primary;
161         struct sctp_af *af;
162 
163         primary = &assoc->peer.primary_addr;
164         list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
165                         transports) {
166                 addr = &transport->ipaddr;
167 
168                 af = sctp_get_af_specific(addr->sa.sa_family);
169                 if (af->cmp_addr(addr, primary)) {
170                         seq_printf(seq, "*");
171                 }
172                 af->seq_dump_addr(seq, addr);
173         }
174 }
175 
176 static void *sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
177 {
178         if (*pos >= sctp_ep_hashsize)
179                 return NULL;
180 
181         if (*pos < 0)
182                 *pos = 0;
183 
184         if (*pos == 0)
185                 seq_printf(seq, " ENDPT     SOCK   STY SST HBKT LPORT   UID INODE LADDRS\n");
186 
187         return (void *)pos;
188 }
189 
190 static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
191 {
192 }
193 
194 
195 static void *sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
196 {
197         if (++*pos >= sctp_ep_hashsize)
198                 return NULL;
199 
200         return pos;
201 }
202 
203 
204 /* Display sctp endpoints (/proc/net/sctp/eps). */
205 static int sctp_eps_seq_show(struct seq_file *seq, void *v)
206 {
207         struct sctp_hashbucket *head;
208         struct sctp_ep_common *epb;
209         struct sctp_endpoint *ep;
210         struct sock *sk;
211         int    hash = *(loff_t *)v;
212 
213         if (hash >= sctp_ep_hashsize)
214                 return -ENOMEM;
215 
216         head = &sctp_ep_hashtable[hash];
217         local_bh_disable();
218         read_lock(&head->lock);
219         sctp_for_each_hentry(epb, &head->chain) {
220                 ep = sctp_ep(epb);
221                 sk = epb->sk;
222                 if (!net_eq(sock_net(sk), seq_file_net(seq)))
223                         continue;
224                 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
225                            sctp_sk(sk)->type, sk->sk_state, hash,
226                            epb->bind_addr.port,
227                            from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
228                            sock_i_ino(sk));
229 
230                 sctp_seq_dump_local_addrs(seq, epb);
231                 seq_printf(seq, "\n");
232         }
233         read_unlock(&head->lock);
234         local_bh_enable();
235 
236         return 0;
237 }
238 
239 static const struct seq_operations sctp_eps_ops = {
240         .start = sctp_eps_seq_start,
241         .next  = sctp_eps_seq_next,
242         .stop  = sctp_eps_seq_stop,
243         .show  = sctp_eps_seq_show,
244 };
245 
246 
247 /* Initialize the seq file operations for 'eps' object. */
248 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
249 {
250         return seq_open_net(inode, file, &sctp_eps_ops,
251                             sizeof(struct seq_net_private));
252 }
253 
254 static const struct file_operations sctp_eps_seq_fops = {
255         .open    = sctp_eps_seq_open,
256         .read    = seq_read,
257         .llseek  = seq_lseek,
258         .release = seq_release_net,
259 };
260 
261 /* Set up the proc fs entry for 'eps' object. */
262 int __net_init sctp_eps_proc_init(struct net *net)
263 {
264         struct proc_dir_entry *p;
265 
266         p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp,
267                         &sctp_eps_seq_fops);
268         if (!p)
269                 return -ENOMEM;
270 
271         return 0;
272 }
273 
274 /* Cleanup the proc fs entry for 'eps' object. */
275 void sctp_eps_proc_exit(struct net *net)
276 {
277         remove_proc_entry("eps", net->sctp.proc_net_sctp);
278 }
279 
280 struct sctp_ht_iter {
281         struct seq_net_private p;
282         struct rhashtable_iter hti;
283         int start_fail;
284 };
285 
286 static void *sctp_transport_seq_start(struct seq_file *seq, loff_t *pos)
287 {
288         struct sctp_ht_iter *iter = seq->private;
289         int err = sctp_transport_walk_start(&iter->hti);
290 
291         if (err) {
292                 iter->start_fail = 1;
293                 return ERR_PTR(err);
294         }
295 
296         iter->start_fail = 0;
297         return sctp_transport_get_idx(seq_file_net(seq), &iter->hti, *pos);
298 }
299 
300 static void sctp_transport_seq_stop(struct seq_file *seq, void *v)
301 {
302         struct sctp_ht_iter *iter = seq->private;
303 
304         if (iter->start_fail)
305                 return;
306         sctp_transport_walk_stop(&iter->hti);
307 }
308 
309 static void *sctp_transport_seq_next(struct seq_file *seq, void *v, loff_t *pos)
310 {
311         struct sctp_ht_iter *iter = seq->private;
312 
313         ++*pos;
314 
315         return sctp_transport_get_next(seq_file_net(seq), &iter->hti);
316 }
317 
318 /* Display sctp associations (/proc/net/sctp/assocs). */
319 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
320 {
321         struct sctp_transport *transport;
322         struct sctp_association *assoc;
323         struct sctp_ep_common *epb;
324         struct sock *sk;
325 
326         if (v == SEQ_START_TOKEN) {
327                 seq_printf(seq, " ASSOC     SOCK   STY SST ST HBKT "
328                                 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
329                                 "RPORT LADDRS <-> RADDRS "
330                                 "HBINT INS OUTS MAXRT T1X T2X RTXC "
331                                 "wmema wmemq sndbuf rcvbuf\n");
332                 return 0;
333         }
334 
335         transport = (struct sctp_transport *)v;
336         if (!sctp_transport_hold(transport))
337                 return 0;
338         assoc = transport->asoc;
339         epb = &assoc->base;
340         sk = epb->sk;
341 
342         seq_printf(seq,
343                    "%8pK %8pK %-3d %-3d %-2d %-4d "
344                    "%4d %8d %8d %7u %5lu %-5d %5d ",
345                    assoc, sk, sctp_sk(sk)->type, sk->sk_state,
346                    assoc->state, 0,
347                    assoc->assoc_id,
348                    assoc->sndbuf_used,
349                    atomic_read(&assoc->rmem_alloc),
350                    from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
351                    sock_i_ino(sk),
352                    epb->bind_addr.port,
353                    assoc->peer.port);
354         seq_printf(seq, " ");
355         sctp_seq_dump_local_addrs(seq, epb);
356         seq_printf(seq, "<-> ");
357         sctp_seq_dump_remote_addrs(seq, assoc);
358         seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
359                    "%8d %8d %8d %8d",
360                 assoc->hbinterval, assoc->c.sinit_max_instreams,
361                 assoc->c.sinit_num_ostreams, assoc->max_retrans,
362                 assoc->init_retries, assoc->shutdown_retries,
363                 assoc->rtx_data_chunks,
364                 atomic_read(&sk->sk_wmem_alloc),
365                 sk->sk_wmem_queued,
366                 sk->sk_sndbuf,
367                 sk->sk_rcvbuf);
368         seq_printf(seq, "\n");
369 
370         sctp_transport_put(transport);
371 
372         return 0;
373 }
374 
375 static const struct seq_operations sctp_assoc_ops = {
376         .start = sctp_transport_seq_start,
377         .next  = sctp_transport_seq_next,
378         .stop  = sctp_transport_seq_stop,
379         .show  = sctp_assocs_seq_show,
380 };
381 
382 /* Initialize the seq file operations for 'assocs' object. */
383 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
384 {
385         return seq_open_net(inode, file, &sctp_assoc_ops,
386                             sizeof(struct sctp_ht_iter));
387 }
388 
389 static const struct file_operations sctp_assocs_seq_fops = {
390         .open    = sctp_assocs_seq_open,
391         .read    = seq_read,
392         .llseek  = seq_lseek,
393         .release = seq_release_net,
394 };
395 
396 /* Set up the proc fs entry for 'assocs' object. */
397 int __net_init sctp_assocs_proc_init(struct net *net)
398 {
399         struct proc_dir_entry *p;
400 
401         p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
402                         &sctp_assocs_seq_fops);
403         if (!p)
404                 return -ENOMEM;
405 
406         return 0;
407 }
408 
409 /* Cleanup the proc fs entry for 'assocs' object. */
410 void sctp_assocs_proc_exit(struct net *net)
411 {
412         remove_proc_entry("assocs", net->sctp.proc_net_sctp);
413 }
414 
415 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
416 {
417         struct sctp_association *assoc;
418         struct sctp_transport *transport, *tsp;
419 
420         if (v == SEQ_START_TOKEN) {
421                 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
422                                 "REM_ADDR_RTX START STATE\n");
423                 return 0;
424         }
425 
426         transport = (struct sctp_transport *)v;
427         if (!sctp_transport_hold(transport))
428                 return 0;
429         assoc = transport->asoc;
430 
431         list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
432                                 transports) {
433                 /*
434                  * The remote address (ADDR)
435                  */
436                 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
437                 seq_printf(seq, " ");
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_puts(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_puts(seq, "0 ");
472 
473                 /*
474                  * The current state of this destination. I.e.
475                  * SCTP_ACTIVE, SCTP_INACTIVE, ...
476                  */
477                 seq_printf(seq, "%d", tsp->state);
478 
479                 seq_printf(seq, "\n");
480         }
481 
482         sctp_transport_put(transport);
483 
484         return 0;
485 }
486 
487 static const struct seq_operations sctp_remaddr_ops = {
488         .start = sctp_transport_seq_start,
489         .next  = sctp_transport_seq_next,
490         .stop  = sctp_transport_seq_stop,
491         .show  = sctp_remaddr_seq_show,
492 };
493 
494 /* Cleanup the proc fs entry for 'remaddr' object. */
495 void sctp_remaddr_proc_exit(struct net *net)
496 {
497         remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
498 }
499 
500 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
501 {
502         return seq_open_net(inode, file, &sctp_remaddr_ops,
503                             sizeof(struct sctp_ht_iter));
504 }
505 
506 static const struct file_operations sctp_remaddr_seq_fops = {
507         .open = sctp_remaddr_seq_open,
508         .read = seq_read,
509         .llseek = seq_lseek,
510         .release = seq_release_net,
511 };
512 
513 int __net_init sctp_remaddr_proc_init(struct net *net)
514 {
515         struct proc_dir_entry *p;
516 
517         p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
518                         &sctp_remaddr_seq_fops);
519         if (!p)
520                 return -ENOMEM;
521         return 0;
522 }
523 

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