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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
37static 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). */
74static 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. */
88static 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
93static 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. */
102int __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. */
115void 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. */
121static 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. */
157static 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
176static 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
190static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
191{
192}
193
194
195static 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). */
205static 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
239static 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. */
248static 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
254static 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. */
262int __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. */
275void sctp_eps_proc_exit(struct net *net)
276{
277 remove_proc_entry("eps", net->sctp.proc_net_sctp);
278}
279
280struct sctp_ht_iter {
281 struct seq_net_private p;
282 struct rhashtable_iter hti;
283};
284
285static struct sctp_transport *sctp_transport_get_next(struct seq_file *seq)
286{
287 struct sctp_ht_iter *iter = seq->private;
288 struct sctp_transport *t;
289
290 t = rhashtable_walk_next(&iter->hti);
291 for (; t; t = rhashtable_walk_next(&iter->hti)) {
292 if (IS_ERR(t)) {
293 if (PTR_ERR(t) == -EAGAIN)
294 continue;
295 break;
296 }
297
298 if (net_eq(sock_net(t->asoc->base.sk), seq_file_net(seq)) &&
299 t->asoc->peer.primary_path == t)
300 break;
301 }
302
303 return t;
304}
305
306static struct sctp_transport *sctp_transport_get_idx(struct seq_file *seq,
307 loff_t pos)
308{
309 void *obj = SEQ_START_TOKEN;
310
311 while (pos && (obj = sctp_transport_get_next(seq)) && !IS_ERR(obj))
312 pos--;
313
314 return obj;
315}
316
317static int sctp_transport_walk_start(struct seq_file *seq)
318{
319 struct sctp_ht_iter *iter = seq->private;
320 int err;
321
322 err = rhashtable_walk_init(&sctp_transport_hashtable, &iter->hti);
323 if (err)
324 return err;
325
326 err = rhashtable_walk_start(&iter->hti);
327
328 return err == -EAGAIN ? 0 : err;
329}
330
331static void sctp_transport_walk_stop(struct seq_file *seq)
332{
333 struct sctp_ht_iter *iter = seq->private;
334
335 rhashtable_walk_stop(&iter->hti);
336 rhashtable_walk_exit(&iter->hti);
337}
338
339static void *sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
340{
341 int err = sctp_transport_walk_start(seq);
342
343 if (err)
344 return ERR_PTR(err);
345
346 return sctp_transport_get_idx(seq, *pos);
347}
348
349static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
350{
351 sctp_transport_walk_stop(seq);
352}
353
354static void *sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
355{
356 ++*pos;
357
358 return sctp_transport_get_next(seq);
359}
360
361/* Display sctp associations (/proc/net/sctp/assocs). */
362static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
363{
364 struct sctp_transport *transport;
365 struct sctp_association *assoc;
366 struct sctp_ep_common *epb;
367 struct sock *sk;
368
369 if (v == SEQ_START_TOKEN) {
370 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
371 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
372 "RPORT LADDRS <-> RADDRS "
373 "HBINT INS OUTS MAXRT T1X T2X RTXC "
374 "wmema wmemq sndbuf rcvbuf\n");
375 return 0;
376 }
377
378 transport = (struct sctp_transport *)v;
379 if (!sctp_transport_hold(transport))
380 return 0;
381 assoc = transport->asoc;
382 epb = &assoc->base;
383 sk = epb->sk;
384
385 seq_printf(seq,
386 "%8pK %8pK %-3d %-3d %-2d %-4d "
387 "%4d %8d %8d %7u %5lu %-5d %5d ",
388 assoc, sk, sctp_sk(sk)->type, sk->sk_state,
389 assoc->state, 0,
390 assoc->assoc_id,
391 assoc->sndbuf_used,
392 atomic_read(&assoc->rmem_alloc),
393 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
394 sock_i_ino(sk),
395 epb->bind_addr.port,
396 assoc->peer.port);
397 seq_printf(seq, " ");
398 sctp_seq_dump_local_addrs(seq, epb);
399 seq_printf(seq, "<-> ");
400 sctp_seq_dump_remote_addrs(seq, assoc);
401 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
402 "%8d %8d %8d %8d",
403 assoc->hbinterval, assoc->c.sinit_max_instreams,
404 assoc->c.sinit_num_ostreams, assoc->max_retrans,
405 assoc->init_retries, assoc->shutdown_retries,
406 assoc->rtx_data_chunks,
407 atomic_read(&sk->sk_wmem_alloc),
408 sk->sk_wmem_queued,
409 sk->sk_sndbuf,
410 sk->sk_rcvbuf);
411 seq_printf(seq, "\n");
412
413 sctp_transport_put(transport);
414
415 return 0;
416}
417
418static const struct seq_operations sctp_assoc_ops = {
419 .start = sctp_assocs_seq_start,
420 .next = sctp_assocs_seq_next,
421 .stop = sctp_assocs_seq_stop,
422 .show = sctp_assocs_seq_show,
423};
424
425/* Initialize the seq file operations for 'assocs' object. */
426static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
427{
428 return seq_open_net(inode, file, &sctp_assoc_ops,
429 sizeof(struct sctp_ht_iter));
430}
431
432static const struct file_operations sctp_assocs_seq_fops = {
433 .open = sctp_assocs_seq_open,
434 .read = seq_read,
435 .llseek = seq_lseek,
436 .release = seq_release_net,
437};
438
439/* Set up the proc fs entry for 'assocs' object. */
440int __net_init sctp_assocs_proc_init(struct net *net)
441{
442 struct proc_dir_entry *p;
443
444 p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
445 &sctp_assocs_seq_fops);
446 if (!p)
447 return -ENOMEM;
448
449 return 0;
450}
451
452/* Cleanup the proc fs entry for 'assocs' object. */
453void sctp_assocs_proc_exit(struct net *net)
454{
455 remove_proc_entry("assocs", net->sctp.proc_net_sctp);
456}
457
458static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
459{
460 int err = sctp_transport_walk_start(seq);
461
462 if (err)
463 return ERR_PTR(err);
464
465 return sctp_transport_get_idx(seq, *pos);
466}
467
468static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos)
469{
470 ++*pos;
471
472 return sctp_transport_get_next(seq);
473}
474
475static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
476{
477 sctp_transport_walk_stop(seq);
478}
479
480static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
481{
482 struct sctp_association *assoc;
483 struct sctp_transport *transport, *tsp;
484
485 if (v == SEQ_START_TOKEN) {
486 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
487 "REM_ADDR_RTX START STATE\n");
488 return 0;
489 }
490
491 transport = (struct sctp_transport *)v;
492 if (!sctp_transport_hold(transport))
493 return 0;
494 assoc = transport->asoc;
495
496 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
497 transports) {
498 /*
499 * The remote address (ADDR)
500 */
501 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
502 seq_printf(seq, " ");
503 /*
504 * The association ID (ASSOC_ID)
505 */
506 seq_printf(seq, "%d ", tsp->asoc->assoc_id);
507
508 /*
509 * If the Heartbeat is active (HB_ACT)
510 * Note: 1 = Active, 0 = Inactive
511 */
512 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
513
514 /*
515 * Retransmit time out (RTO)
516 */
517 seq_printf(seq, "%lu ", tsp->rto);
518
519 /*
520 * Maximum path retransmit count (PATH_MAX_RTX)
521 */
522 seq_printf(seq, "%d ", tsp->pathmaxrxt);
523
524 /*
525 * remote address retransmit count (REM_ADDR_RTX)
526 * Note: We don't have a way to tally this at the moment
527 * so lets just leave it as zero for the moment
528 */
529 seq_puts(seq, "0 ");
530
531 /*
532 * remote address start time (START). This is also not
533 * currently implemented, but we can record it with a
534 * jiffies marker in a subsequent patch
535 */
536 seq_puts(seq, "0 ");
537
538 /*
539 * The current state of this destination. I.e.
540 * SCTP_ACTIVE, SCTP_INACTIVE, ...
541 */
542 seq_printf(seq, "%d", tsp->state);
543
544 seq_printf(seq, "\n");
545 }
546
547 sctp_transport_put(transport);
548
549 return 0;
550}
551
552static const struct seq_operations sctp_remaddr_ops = {
553 .start = sctp_remaddr_seq_start,
554 .next = sctp_remaddr_seq_next,
555 .stop = sctp_remaddr_seq_stop,
556 .show = sctp_remaddr_seq_show,
557};
558
559/* Cleanup the proc fs entry for 'remaddr' object. */
560void sctp_remaddr_proc_exit(struct net *net)
561{
562 remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
563}
564
565static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
566{
567 return seq_open_net(inode, file, &sctp_remaddr_ops,
568 sizeof(struct sctp_ht_iter));
569}
570
571static const struct file_operations sctp_remaddr_seq_fops = {
572 .open = sctp_remaddr_seq_open,
573 .read = seq_read,
574 .llseek = seq_lseek,
575 .release = seq_release_net,
576};
577
578int __net_init sctp_remaddr_proc_init(struct net *net)
579{
580 struct proc_dir_entry *p;
581
582 p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
583 &sctp_remaddr_seq_fops);
584 if (!p)
585 return -ENOMEM;
586 return 0;
587}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/* SCTP kernel implementation
3 * Copyright (c) 2003 International Business Machines, Corp.
4 *
5 * This file is part of the SCTP kernel implementation
6 *
7 * Please send any bug reports or fixes you make to the
8 * email address(es):
9 * lksctp developers <linux-sctp@vger.kernel.org>
10 *
11 * Written or modified by:
12 * Sridhar Samudrala <sri@us.ibm.com>
13 */
14
15#include <linux/types.h>
16#include <linux/seq_file.h>
17#include <linux/init.h>
18#include <linux/export.h>
19#include <net/sctp/sctp.h>
20#include <net/ip.h> /* for snmp_fold_field */
21
22static const struct snmp_mib sctp_snmp_list[] = {
23 SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB),
24 SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS),
25 SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS),
26 SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS),
27 SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS),
28 SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES),
29 SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS),
30 SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS),
31 SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS),
32 SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS),
33 SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS),
34 SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS),
35 SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS),
36 SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS),
37 SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS),
38 SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS),
39 SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS),
40 SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
41 SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
42 SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
43 SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
44 SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
45 SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
46 SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
47 SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
48 SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
49 SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
50 SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
51 SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
52 SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
53 SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
54 SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
55 SNMP_MIB_SENTINEL
56};
57
58/* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
59static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
60{
61 unsigned long buff[SCTP_MIB_MAX];
62 struct net *net = seq->private;
63 int i;
64
65 memset(buff, 0, sizeof(unsigned long) * SCTP_MIB_MAX);
66
67 snmp_get_cpu_field_batch(buff, sctp_snmp_list,
68 net->sctp.sctp_statistics);
69 for (i = 0; sctp_snmp_list[i].name; i++)
70 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
71 buff[i]);
72
73 return 0;
74}
75
76/* Dump local addresses of an association/endpoint. */
77static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
78{
79 struct sctp_association *asoc;
80 struct sctp_sockaddr_entry *laddr;
81 struct sctp_transport *peer;
82 union sctp_addr *addr, *primary = NULL;
83 struct sctp_af *af;
84
85 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
86 asoc = sctp_assoc(epb);
87
88 peer = asoc->peer.primary_path;
89 if (unlikely(peer == NULL)) {
90 WARN(1, "Association %p with NULL primary path!\n", asoc);
91 return;
92 }
93
94 primary = &peer->saddr;
95 }
96
97 rcu_read_lock();
98 list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
99 if (!laddr->valid)
100 continue;
101
102 addr = &laddr->a;
103 af = sctp_get_af_specific(addr->sa.sa_family);
104 if (primary && af->cmp_addr(addr, primary)) {
105 seq_printf(seq, "*");
106 }
107 af->seq_dump_addr(seq, addr);
108 }
109 rcu_read_unlock();
110}
111
112/* Dump remote addresses of an association. */
113static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
114{
115 struct sctp_transport *transport;
116 union sctp_addr *addr, *primary;
117 struct sctp_af *af;
118
119 primary = &assoc->peer.primary_addr;
120 list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
121 transports) {
122 addr = &transport->ipaddr;
123
124 af = sctp_get_af_specific(addr->sa.sa_family);
125 if (af->cmp_addr(addr, primary)) {
126 seq_printf(seq, "*");
127 }
128 af->seq_dump_addr(seq, addr);
129 }
130}
131
132static void *sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
133{
134 if (*pos >= sctp_ep_hashsize)
135 return NULL;
136
137 if (*pos < 0)
138 *pos = 0;
139
140 if (*pos == 0)
141 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n");
142
143 return (void *)pos;
144}
145
146static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
147{
148}
149
150
151static void *sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
152{
153 if (++*pos >= sctp_ep_hashsize)
154 return NULL;
155
156 return pos;
157}
158
159
160/* Display sctp endpoints (/proc/net/sctp/eps). */
161static int sctp_eps_seq_show(struct seq_file *seq, void *v)
162{
163 struct sctp_hashbucket *head;
164 struct sctp_endpoint *ep;
165 struct sock *sk;
166 int hash = *(loff_t *)v;
167
168 if (hash >= sctp_ep_hashsize)
169 return -ENOMEM;
170
171 head = &sctp_ep_hashtable[hash];
172 read_lock_bh(&head->lock);
173 sctp_for_each_hentry(ep, &head->chain) {
174 sk = ep->base.sk;
175 if (!net_eq(sock_net(sk), seq_file_net(seq)))
176 continue;
177 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
178 sctp_sk(sk)->type, sk->sk_state, hash,
179 ep->base.bind_addr.port,
180 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
181 sock_i_ino(sk));
182
183 sctp_seq_dump_local_addrs(seq, &ep->base);
184 seq_printf(seq, "\n");
185 }
186 read_unlock_bh(&head->lock);
187
188 return 0;
189}
190
191static const struct seq_operations sctp_eps_ops = {
192 .start = sctp_eps_seq_start,
193 .next = sctp_eps_seq_next,
194 .stop = sctp_eps_seq_stop,
195 .show = sctp_eps_seq_show,
196};
197
198struct sctp_ht_iter {
199 struct seq_net_private p;
200 struct rhashtable_iter hti;
201};
202
203static void *sctp_transport_seq_start(struct seq_file *seq, loff_t *pos)
204{
205 struct sctp_ht_iter *iter = seq->private;
206
207 sctp_transport_walk_start(&iter->hti);
208
209 return sctp_transport_get_idx(seq_file_net(seq), &iter->hti, *pos);
210}
211
212static void sctp_transport_seq_stop(struct seq_file *seq, void *v)
213{
214 struct sctp_ht_iter *iter = seq->private;
215
216 if (v && v != SEQ_START_TOKEN) {
217 struct sctp_transport *transport = v;
218
219 sctp_transport_put(transport);
220 }
221
222 sctp_transport_walk_stop(&iter->hti);
223}
224
225static void *sctp_transport_seq_next(struct seq_file *seq, void *v, loff_t *pos)
226{
227 struct sctp_ht_iter *iter = seq->private;
228
229 if (v && v != SEQ_START_TOKEN) {
230 struct sctp_transport *transport = v;
231
232 sctp_transport_put(transport);
233 }
234
235 ++*pos;
236
237 return sctp_transport_get_next(seq_file_net(seq), &iter->hti);
238}
239
240/* Display sctp associations (/proc/net/sctp/assocs). */
241static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
242{
243 struct sctp_transport *transport;
244 struct sctp_association *assoc;
245 struct sctp_ep_common *epb;
246 struct sock *sk;
247
248 if (v == SEQ_START_TOKEN) {
249 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
250 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
251 "RPORT LADDRS <-> RADDRS "
252 "HBINT INS OUTS MAXRT T1X T2X RTXC "
253 "wmema wmemq sndbuf rcvbuf\n");
254 return 0;
255 }
256
257 transport = (struct sctp_transport *)v;
258 assoc = transport->asoc;
259 epb = &assoc->base;
260 sk = epb->sk;
261
262 seq_printf(seq,
263 "%8pK %8pK %-3d %-3d %-2d %-4d "
264 "%4d %8d %8d %7u %5lu %-5d %5d ",
265 assoc, sk, sctp_sk(sk)->type, sk->sk_state,
266 assoc->state, 0,
267 assoc->assoc_id,
268 assoc->sndbuf_used,
269 atomic_read(&assoc->rmem_alloc),
270 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
271 sock_i_ino(sk),
272 epb->bind_addr.port,
273 assoc->peer.port);
274 seq_printf(seq, " ");
275 sctp_seq_dump_local_addrs(seq, epb);
276 seq_printf(seq, "<-> ");
277 sctp_seq_dump_remote_addrs(seq, assoc);
278 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
279 "%8d %8d %8d %8d",
280 assoc->hbinterval, assoc->stream.incnt,
281 assoc->stream.outcnt, assoc->max_retrans,
282 assoc->init_retries, assoc->shutdown_retries,
283 assoc->rtx_data_chunks,
284 refcount_read(&sk->sk_wmem_alloc),
285 READ_ONCE(sk->sk_wmem_queued),
286 sk->sk_sndbuf,
287 sk->sk_rcvbuf);
288 seq_printf(seq, "\n");
289
290 return 0;
291}
292
293static const struct seq_operations sctp_assoc_ops = {
294 .start = sctp_transport_seq_start,
295 .next = sctp_transport_seq_next,
296 .stop = sctp_transport_seq_stop,
297 .show = sctp_assocs_seq_show,
298};
299
300static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
301{
302 struct sctp_association *assoc;
303 struct sctp_transport *transport, *tsp;
304
305 if (v == SEQ_START_TOKEN) {
306 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
307 "REM_ADDR_RTX START STATE\n");
308 return 0;
309 }
310
311 transport = (struct sctp_transport *)v;
312 assoc = transport->asoc;
313
314 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
315 transports) {
316 /*
317 * The remote address (ADDR)
318 */
319 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
320 seq_printf(seq, " ");
321 /*
322 * The association ID (ASSOC_ID)
323 */
324 seq_printf(seq, "%d ", tsp->asoc->assoc_id);
325
326 /*
327 * If the Heartbeat is active (HB_ACT)
328 * Note: 1 = Active, 0 = Inactive
329 */
330 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
331
332 /*
333 * Retransmit time out (RTO)
334 */
335 seq_printf(seq, "%lu ", tsp->rto);
336
337 /*
338 * Maximum path retransmit count (PATH_MAX_RTX)
339 */
340 seq_printf(seq, "%d ", tsp->pathmaxrxt);
341
342 /*
343 * remote address retransmit count (REM_ADDR_RTX)
344 * Note: We don't have a way to tally this at the moment
345 * so lets just leave it as zero for the moment
346 */
347 seq_puts(seq, "0 ");
348
349 /*
350 * remote address start time (START). This is also not
351 * currently implemented, but we can record it with a
352 * jiffies marker in a subsequent patch
353 */
354 seq_puts(seq, "0 ");
355
356 /*
357 * The current state of this destination. I.e.
358 * SCTP_ACTIVE, SCTP_INACTIVE, ...
359 */
360 seq_printf(seq, "%d", tsp->state);
361
362 seq_printf(seq, "\n");
363 }
364
365 return 0;
366}
367
368static const struct seq_operations sctp_remaddr_ops = {
369 .start = sctp_transport_seq_start,
370 .next = sctp_transport_seq_next,
371 .stop = sctp_transport_seq_stop,
372 .show = sctp_remaddr_seq_show,
373};
374
375/* Set up the proc fs entry for the SCTP protocol. */
376int __net_init sctp_proc_init(struct net *net)
377{
378 net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net);
379 if (!net->sctp.proc_net_sctp)
380 return -ENOMEM;
381 if (!proc_create_net_single("snmp", 0444, net->sctp.proc_net_sctp,
382 sctp_snmp_seq_show, NULL))
383 goto cleanup;
384 if (!proc_create_net("eps", 0444, net->sctp.proc_net_sctp,
385 &sctp_eps_ops, sizeof(struct seq_net_private)))
386 goto cleanup;
387 if (!proc_create_net("assocs", 0444, net->sctp.proc_net_sctp,
388 &sctp_assoc_ops, sizeof(struct sctp_ht_iter)))
389 goto cleanup;
390 if (!proc_create_net("remaddr", 0444, net->sctp.proc_net_sctp,
391 &sctp_remaddr_ops, sizeof(struct sctp_ht_iter)))
392 goto cleanup;
393 return 0;
394
395cleanup:
396 remove_proc_subtree("sctp", net->proc_net);
397 net->sctp.proc_net_sctp = NULL;
398 return -ENOMEM;
399}