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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 <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
43static 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). */
80static 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. */
93static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
94{
95 return single_open(file, sctp_snmp_seq_show, NULL);
96}
97
98static 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. */
107int __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. */
119void sctp_snmp_proc_exit(void)
120{
121 remove_proc_entry("snmp", proc_net_sctp);
122}
123
124/* Dump local addresses of an association/endpoint. */
125static 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. */
150static 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
168static 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
182static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
183{
184}
185
186
187static 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). */
197static 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
229static 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. */
238static int sctp_eps_seq_open(struct inode *inode, struct file *file)
239{
240 return seq_open(file, &sctp_eps_ops);
241}
242
243static 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. */
251int __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. */
263void sctp_eps_proc_exit(void)
264{
265 remove_proc_entry("eps", proc_net_sctp);
266}
267
268
269static 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
286static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
287{
288}
289
290
291static 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). */
300static 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
346static 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. */
354static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
355{
356 return seq_open(file, &sctp_assoc_ops);
357}
358
359static 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. */
367int __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. */
380void sctp_assocs_proc_exit(void)
381{
382 remove_proc_entry("assocs", proc_net_sctp);
383}
384
385static 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
400static 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
408static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
409{
410}
411
412static 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
483static 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. */
491void sctp_remaddr_proc_exit(void)
492{
493 remove_proc_entry("remaddr", proc_net_sctp);
494}
495
496static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
497{
498 return seq_open(file, &sctp_remaddr_ops);
499}
500
501static 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
508int __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}
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_ep_common *epb;
165 struct sctp_endpoint *ep;
166 struct sock *sk;
167 int hash = *(loff_t *)v;
168
169 if (hash >= sctp_ep_hashsize)
170 return -ENOMEM;
171
172 head = &sctp_ep_hashtable[hash];
173 read_lock_bh(&head->lock);
174 sctp_for_each_hentry(epb, &head->chain) {
175 ep = sctp_ep(epb);
176 sk = epb->sk;
177 if (!net_eq(sock_net(sk), seq_file_net(seq)))
178 continue;
179 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
180 sctp_sk(sk)->type, sk->sk_state, hash,
181 epb->bind_addr.port,
182 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
183 sock_i_ino(sk));
184
185 sctp_seq_dump_local_addrs(seq, epb);
186 seq_printf(seq, "\n");
187 }
188 read_unlock_bh(&head->lock);
189
190 return 0;
191}
192
193static const struct seq_operations sctp_eps_ops = {
194 .start = sctp_eps_seq_start,
195 .next = sctp_eps_seq_next,
196 .stop = sctp_eps_seq_stop,
197 .show = sctp_eps_seq_show,
198};
199
200struct sctp_ht_iter {
201 struct seq_net_private p;
202 struct rhashtable_iter hti;
203};
204
205static void *sctp_transport_seq_start(struct seq_file *seq, loff_t *pos)
206{
207 struct sctp_ht_iter *iter = seq->private;
208
209 sctp_transport_walk_start(&iter->hti);
210
211 return sctp_transport_get_idx(seq_file_net(seq), &iter->hti, *pos);
212}
213
214static void sctp_transport_seq_stop(struct seq_file *seq, void *v)
215{
216 struct sctp_ht_iter *iter = seq->private;
217
218 sctp_transport_walk_stop(&iter->hti);
219}
220
221static void *sctp_transport_seq_next(struct seq_file *seq, void *v, loff_t *pos)
222{
223 struct sctp_ht_iter *iter = seq->private;
224
225 ++*pos;
226
227 return sctp_transport_get_next(seq_file_net(seq), &iter->hti);
228}
229
230/* Display sctp associations (/proc/net/sctp/assocs). */
231static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
232{
233 struct sctp_transport *transport;
234 struct sctp_association *assoc;
235 struct sctp_ep_common *epb;
236 struct sock *sk;
237
238 if (v == SEQ_START_TOKEN) {
239 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
240 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
241 "RPORT LADDRS <-> RADDRS "
242 "HBINT INS OUTS MAXRT T1X T2X RTXC "
243 "wmema wmemq sndbuf rcvbuf\n");
244 return 0;
245 }
246
247 transport = (struct sctp_transport *)v;
248 assoc = transport->asoc;
249 epb = &assoc->base;
250 sk = epb->sk;
251
252 seq_printf(seq,
253 "%8pK %8pK %-3d %-3d %-2d %-4d "
254 "%4d %8d %8d %7u %5lu %-5d %5d ",
255 assoc, sk, sctp_sk(sk)->type, sk->sk_state,
256 assoc->state, 0,
257 assoc->assoc_id,
258 assoc->sndbuf_used,
259 atomic_read(&assoc->rmem_alloc),
260 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
261 sock_i_ino(sk),
262 epb->bind_addr.port,
263 assoc->peer.port);
264 seq_printf(seq, " ");
265 sctp_seq_dump_local_addrs(seq, epb);
266 seq_printf(seq, "<-> ");
267 sctp_seq_dump_remote_addrs(seq, assoc);
268 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
269 "%8d %8d %8d %8d",
270 assoc->hbinterval, assoc->stream.incnt,
271 assoc->stream.outcnt, assoc->max_retrans,
272 assoc->init_retries, assoc->shutdown_retries,
273 assoc->rtx_data_chunks,
274 refcount_read(&sk->sk_wmem_alloc),
275 sk->sk_wmem_queued,
276 sk->sk_sndbuf,
277 sk->sk_rcvbuf);
278 seq_printf(seq, "\n");
279
280 sctp_transport_put(transport);
281
282 return 0;
283}
284
285static const struct seq_operations sctp_assoc_ops = {
286 .start = sctp_transport_seq_start,
287 .next = sctp_transport_seq_next,
288 .stop = sctp_transport_seq_stop,
289 .show = sctp_assocs_seq_show,
290};
291
292static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
293{
294 struct sctp_association *assoc;
295 struct sctp_transport *transport, *tsp;
296
297 if (v == SEQ_START_TOKEN) {
298 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
299 "REM_ADDR_RTX START STATE\n");
300 return 0;
301 }
302
303 transport = (struct sctp_transport *)v;
304 assoc = transport->asoc;
305
306 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
307 transports) {
308 /*
309 * The remote address (ADDR)
310 */
311 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
312 seq_printf(seq, " ");
313 /*
314 * The association ID (ASSOC_ID)
315 */
316 seq_printf(seq, "%d ", tsp->asoc->assoc_id);
317
318 /*
319 * If the Heartbeat is active (HB_ACT)
320 * Note: 1 = Active, 0 = Inactive
321 */
322 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
323
324 /*
325 * Retransmit time out (RTO)
326 */
327 seq_printf(seq, "%lu ", tsp->rto);
328
329 /*
330 * Maximum path retransmit count (PATH_MAX_RTX)
331 */
332 seq_printf(seq, "%d ", tsp->pathmaxrxt);
333
334 /*
335 * remote address retransmit count (REM_ADDR_RTX)
336 * Note: We don't have a way to tally this at the moment
337 * so lets just leave it as zero for the moment
338 */
339 seq_puts(seq, "0 ");
340
341 /*
342 * remote address start time (START). This is also not
343 * currently implemented, but we can record it with a
344 * jiffies marker in a subsequent patch
345 */
346 seq_puts(seq, "0 ");
347
348 /*
349 * The current state of this destination. I.e.
350 * SCTP_ACTIVE, SCTP_INACTIVE, ...
351 */
352 seq_printf(seq, "%d", tsp->state);
353
354 seq_printf(seq, "\n");
355 }
356
357 sctp_transport_put(transport);
358
359 return 0;
360}
361
362static const struct seq_operations sctp_remaddr_ops = {
363 .start = sctp_transport_seq_start,
364 .next = sctp_transport_seq_next,
365 .stop = sctp_transport_seq_stop,
366 .show = sctp_remaddr_seq_show,
367};
368
369/* Set up the proc fs entry for the SCTP protocol. */
370int __net_init sctp_proc_init(struct net *net)
371{
372 net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net);
373 if (!net->sctp.proc_net_sctp)
374 return -ENOMEM;
375 if (!proc_create_net_single("snmp", 0444, net->sctp.proc_net_sctp,
376 sctp_snmp_seq_show, NULL))
377 goto cleanup;
378 if (!proc_create_net("eps", 0444, net->sctp.proc_net_sctp,
379 &sctp_eps_ops, sizeof(struct seq_net_private)))
380 goto cleanup;
381 if (!proc_create_net("assocs", 0444, net->sctp.proc_net_sctp,
382 &sctp_assoc_ops, sizeof(struct sctp_ht_iter)))
383 goto cleanup;
384 if (!proc_create_net("remaddr", 0444, net->sctp.proc_net_sctp,
385 &sctp_remaddr_ops, sizeof(struct sctp_ht_iter)))
386 goto cleanup;
387 return 0;
388
389cleanup:
390 remove_proc_subtree("sctp", net->proc_net);
391 net->sctp.proc_net_sctp = NULL;
392 return -ENOMEM;
393}