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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, 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 <linux-sctp@vger.kernel.org>
 26  *
 27  * Written or modified by:
 28  *    Sridhar Samudrala <sri@us.ibm.com>
 29  */
 30 
 31 #include <linux/types.h>
 32 #include <linux/seq_file.h>
 33 #include <linux/init.h>
 34 #include <linux/export.h>
 35 #include <net/sctp/sctp.h>
 36 #include <net/ip.h> /* for snmp_fold_field */
 37 
 38 static const struct snmp_mib sctp_snmp_list[] = {
 39         SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB),
 40         SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS),
 41         SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS),
 42         SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS),
 43         SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS),
 44         SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES),
 45         SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS),
 46         SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS),
 47         SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS),
 48         SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS),
 49         SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS),
 50         SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS),
 51         SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS),
 52         SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS),
 53         SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS),
 54         SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS),
 55         SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS),
 56         SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
 57         SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
 58         SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
 59         SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
 60         SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
 61         SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
 62         SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
 63         SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
 64         SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
 65         SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
 66         SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
 67         SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
 68         SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
 69         SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
 70         SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
 71         SNMP_MIB_SENTINEL
 72 };
 73 
 74 /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
 75 static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
 76 {
 77         struct net *net = seq->private;
 78         int i;
 79 
 80         for (i = 0; sctp_snmp_list[i].name != NULL; i++)
 81                 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
 82                            snmp_fold_field((void __percpu **)net->sctp.sctp_statistics,
 83                                       sctp_snmp_list[i].entry));
 84 
 85         return 0;
 86 }
 87 
 88 /* Initialize the seq file operations for 'snmp' object. */
 89 static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
 90 {
 91         return single_open_net(inode, file, sctp_snmp_seq_show);
 92 }
 93 
 94 static const struct file_operations sctp_snmp_seq_fops = {
 95         .owner   = THIS_MODULE,
 96         .open    = sctp_snmp_seq_open,
 97         .read    = seq_read,
 98         .llseek  = seq_lseek,
 99         .release = single_release_net,
100 };
101 
102 /* Set up the proc fs entry for 'snmp' object. */
103 int __net_init sctp_snmp_proc_init(struct net *net)
104 {
105         struct proc_dir_entry *p;
106 
107         p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp,
108                         &sctp_snmp_seq_fops);
109         if (!p)
110                 return -ENOMEM;
111 
112         return 0;
113 }
114 
115 /* Cleanup the proc fs entry for 'snmp' object. */
116 void sctp_snmp_proc_exit(struct net *net)
117 {
118         remove_proc_entry("snmp", net->sctp.proc_net_sctp);
119 }
120 
121 /* Dump local addresses of an association/endpoint. */
122 static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
123 {
124         struct sctp_association *asoc;
125         struct sctp_sockaddr_entry *laddr;
126         struct sctp_transport *peer;
127         union sctp_addr *addr, *primary = NULL;
128         struct sctp_af *af;
129 
130         if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
131                 asoc = sctp_assoc(epb);
132 
133                 peer = asoc->peer.primary_path;
134                 if (unlikely(peer == NULL)) {
135                         WARN(1, "Association %p with NULL primary path!\n", asoc);
136                         return;
137                 }
138 
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. */
158 static 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 
181 static 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 
195 static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
196 {
197 }
198 
199 
200 static 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). */
210 static 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         int    hash = *(loff_t *)v;
217 
218         if (hash >= sctp_ep_hashsize)
219                 return -ENOMEM;
220 
221         head = &sctp_ep_hashtable[hash];
222         sctp_local_bh_disable();
223         read_lock(&head->lock);
224         sctp_for_each_hentry(epb, &head->chain) {
225                 ep = sctp_ep(epb);
226                 sk = epb->sk;
227                 if (!net_eq(sock_net(sk), seq_file_net(seq)))
228                         continue;
229                 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
230                            sctp_sk(sk)->type, sk->sk_state, hash,
231                            epb->bind_addr.port,
232                            from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
233                            sock_i_ino(sk));
234 
235                 sctp_seq_dump_local_addrs(seq, epb);
236                 seq_printf(seq, "\n");
237         }
238         read_unlock(&head->lock);
239         sctp_local_bh_enable();
240 
241         return 0;
242 }
243 
244 static const struct seq_operations sctp_eps_ops = {
245         .start = sctp_eps_seq_start,
246         .next  = sctp_eps_seq_next,
247         .stop  = sctp_eps_seq_stop,
248         .show  = sctp_eps_seq_show,
249 };
250 
251 
252 /* Initialize the seq file operations for 'eps' object. */
253 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
254 {
255         return seq_open_net(inode, file, &sctp_eps_ops,
256                             sizeof(struct seq_net_private));
257 }
258 
259 static const struct file_operations sctp_eps_seq_fops = {
260         .open    = sctp_eps_seq_open,
261         .read    = seq_read,
262         .llseek  = seq_lseek,
263         .release = seq_release_net,
264 };
265 
266 /* Set up the proc fs entry for 'eps' object. */
267 int __net_init sctp_eps_proc_init(struct net *net)
268 {
269         struct proc_dir_entry *p;
270 
271         p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp,
272                         &sctp_eps_seq_fops);
273         if (!p)
274                 return -ENOMEM;
275 
276         return 0;
277 }
278 
279 /* Cleanup the proc fs entry for 'eps' object. */
280 void sctp_eps_proc_exit(struct net *net)
281 {
282         remove_proc_entry("eps", net->sctp.proc_net_sctp);
283 }
284 
285 
286 static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
287 {
288         if (*pos >= sctp_assoc_hashsize)
289                 return NULL;
290 
291         if (*pos < 0)
292                 *pos = 0;
293 
294         if (*pos == 0)
295                 seq_printf(seq, " ASSOC     SOCK   STY SST ST HBKT "
296                                 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
297                                 "RPORT LADDRS <-> RADDRS "
298                                 "HBINT INS OUTS MAXRT T1X T2X RTXC "
299                                 "wmema wmemq sndbuf rcvbuf\n");
300 
301         return (void *)pos;
302 }
303 
304 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
305 {
306 }
307 
308 
309 static 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). */
318 static 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         int    hash = *(loff_t *)v;
325 
326         if (hash >= sctp_assoc_hashsize)
327                 return -ENOMEM;
328 
329         head = &sctp_assoc_hashtable[hash];
330         sctp_local_bh_disable();
331         read_lock(&head->lock);
332         sctp_for_each_hentry(epb, &head->chain) {
333                 assoc = sctp_assoc(epb);
334                 sk = epb->sk;
335                 if (!net_eq(sock_net(sk), seq_file_net(seq)))
336                         continue;
337                 seq_printf(seq,
338                            "%8pK %8pK %-3d %-3d %-2d %-4d "
339                            "%4d %8d %8d %7u %5lu %-5d %5d ",
340                            assoc, sk, sctp_sk(sk)->type, sk->sk_state,
341                            assoc->state, hash,
342                            assoc->assoc_id,
343                            assoc->sndbuf_used,
344                            atomic_read(&assoc->rmem_alloc),
345                            from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
346                            sock_i_ino(sk),
347                            epb->bind_addr.port,
348                            assoc->peer.port);
349                 seq_printf(seq, " ");
350                 sctp_seq_dump_local_addrs(seq, epb);
351                 seq_printf(seq, "<-> ");
352                 sctp_seq_dump_remote_addrs(seq, assoc);
353                 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
354                            "%8d %8d %8d %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                         atomic_read(&sk->sk_wmem_alloc),
360                         sk->sk_wmem_queued,
361                         sk->sk_sndbuf,
362                         sk->sk_rcvbuf);
363                 seq_printf(seq, "\n");
364         }
365         read_unlock(&head->lock);
366         sctp_local_bh_enable();
367 
368         return 0;
369 }
370 
371 static const struct seq_operations sctp_assoc_ops = {
372         .start = sctp_assocs_seq_start,
373         .next  = sctp_assocs_seq_next,
374         .stop  = sctp_assocs_seq_stop,
375         .show  = sctp_assocs_seq_show,
376 };
377 
378 /* Initialize the seq file operations for 'assocs' object. */
379 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
380 {
381         return seq_open_net(inode, file, &sctp_assoc_ops,
382                             sizeof(struct seq_net_private));
383 }
384 
385 static const struct file_operations sctp_assocs_seq_fops = {
386         .open    = sctp_assocs_seq_open,
387         .read    = seq_read,
388         .llseek  = seq_lseek,
389         .release = seq_release_net,
390 };
391 
392 /* Set up the proc fs entry for 'assocs' object. */
393 int __net_init sctp_assocs_proc_init(struct net *net)
394 {
395         struct proc_dir_entry *p;
396 
397         p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
398                         &sctp_assocs_seq_fops);
399         if (!p)
400                 return -ENOMEM;
401 
402         return 0;
403 }
404 
405 /* Cleanup the proc fs entry for 'assocs' object. */
406 void sctp_assocs_proc_exit(struct net *net)
407 {
408         remove_proc_entry("assocs", net->sctp.proc_net_sctp);
409 }
410 
411 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
412 {
413         if (*pos >= sctp_assoc_hashsize)
414                 return NULL;
415 
416         if (*pos < 0)
417                 *pos = 0;
418 
419         if (*pos == 0)
420                 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
421                                 "REM_ADDR_RTX  START\n");
422 
423         return (void *)pos;
424 }
425 
426 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos)
427 {
428         if (++*pos >= sctp_assoc_hashsize)
429                 return NULL;
430 
431         return pos;
432 }
433 
434 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
435 {
436 }
437 
438 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
439 {
440         struct sctp_hashbucket *head;
441         struct sctp_ep_common *epb;
442         struct sctp_association *assoc;
443         struct sctp_transport *tsp;
444         int    hash = *(loff_t *)v;
445 
446         if (hash >= sctp_assoc_hashsize)
447                 return -ENOMEM;
448 
449         head = &sctp_assoc_hashtable[hash];
450         sctp_local_bh_disable();
451         read_lock(&head->lock);
452         rcu_read_lock();
453         sctp_for_each_hentry(epb, &head->chain) {
454                 if (!net_eq(sock_net(epb->sk), seq_file_net(seq)))
455                         continue;
456                 assoc = sctp_assoc(epb);
457                 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
458                                         transports) {
459                         if (tsp->dead)
460                                 continue;
461 
462                         /*
463                          * The remote address (ADDR)
464                          */
465                         tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
466                         seq_printf(seq, " ");
467 
468                         /*
469                          * The association ID (ASSOC_ID)
470                          */
471                         seq_printf(seq, "%d ", tsp->asoc->assoc_id);
472 
473                         /*
474                          * If the Heartbeat is active (HB_ACT)
475                          * Note: 1 = Active, 0 = Inactive
476                          */
477                         seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
478 
479                         /*
480                          * Retransmit time out (RTO)
481                          */
482                         seq_printf(seq, "%lu ", tsp->rto);
483 
484                         /*
485                          * Maximum path retransmit count (PATH_MAX_RTX)
486                          */
487                         seq_printf(seq, "%d ", tsp->pathmaxrxt);
488 
489                         /*
490                          * remote address retransmit count (REM_ADDR_RTX)
491                          * Note: We don't have a way to tally this at the moment
492                          * so lets just leave it as zero for the moment
493                          */
494                         seq_printf(seq, "0 ");
495 
496                         /*
497                          * remote address start time (START).  This is also not
498                          * currently implemented, but we can record it with a
499                          * jiffies marker in a subsequent patch
500                          */
501                         seq_printf(seq, "");
502 
503                         seq_printf(seq, "\n");
504                 }
505         }
506 
507         rcu_read_unlock();
508         read_unlock(&head->lock);
509         sctp_local_bh_enable();
510 
511         return 0;
512 
513 }
514 
515 static const struct seq_operations sctp_remaddr_ops = {
516         .start = sctp_remaddr_seq_start,
517         .next  = sctp_remaddr_seq_next,
518         .stop  = sctp_remaddr_seq_stop,
519         .show  = sctp_remaddr_seq_show,
520 };
521 
522 /* Cleanup the proc fs entry for 'remaddr' object. */
523 void sctp_remaddr_proc_exit(struct net *net)
524 {
525         remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
526 }
527 
528 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
529 {
530         return seq_open_net(inode, file, &sctp_remaddr_ops,
531                             sizeof(struct seq_net_private));
532 }
533 
534 static const struct file_operations sctp_remaddr_seq_fops = {
535         .open = sctp_remaddr_seq_open,
536         .read = seq_read,
537         .llseek = seq_lseek,
538         .release = seq_release_net,
539 };
540 
541 int __net_init sctp_remaddr_proc_init(struct net *net)
542 {
543         struct proc_dir_entry *p;
544 
545         p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
546                         &sctp_remaddr_seq_fops);
547         if (!p)
548                 return -ENOMEM;
549         return 0;
550 }
551 

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