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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 unsigned long buff[SCTP_MIB_MAX];
77 struct net *net = seq->private;
78 int i;
79
80 memset(buff, 0, sizeof(unsigned long) * SCTP_MIB_MAX);
81
82 snmp_get_cpu_field_batch(buff, sctp_snmp_list,
83 net->sctp.sctp_statistics);
84 for (i = 0; sctp_snmp_list[i].name; i++)
85 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
86 buff[i]);
87
88 return 0;
89}
90
91/* Initialize the seq file operations for 'snmp' object. */
92static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
93{
94 return single_open_net(inode, file, sctp_snmp_seq_show);
95}
96
97static const struct file_operations sctp_snmp_seq_fops = {
98 .open = sctp_snmp_seq_open,
99 .read = seq_read,
100 .llseek = seq_lseek,
101 .release = single_release_net,
102};
103
104/* Dump local addresses of an association/endpoint. */
105static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
106{
107 struct sctp_association *asoc;
108 struct sctp_sockaddr_entry *laddr;
109 struct sctp_transport *peer;
110 union sctp_addr *addr, *primary = NULL;
111 struct sctp_af *af;
112
113 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
114 asoc = sctp_assoc(epb);
115
116 peer = asoc->peer.primary_path;
117 if (unlikely(peer == NULL)) {
118 WARN(1, "Association %p with NULL primary path!\n", asoc);
119 return;
120 }
121
122 primary = &peer->saddr;
123 }
124
125 rcu_read_lock();
126 list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
127 if (!laddr->valid)
128 continue;
129
130 addr = &laddr->a;
131 af = sctp_get_af_specific(addr->sa.sa_family);
132 if (primary && af->cmp_addr(addr, primary)) {
133 seq_printf(seq, "*");
134 }
135 af->seq_dump_addr(seq, addr);
136 }
137 rcu_read_unlock();
138}
139
140/* Dump remote addresses of an association. */
141static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
142{
143 struct sctp_transport *transport;
144 union sctp_addr *addr, *primary;
145 struct sctp_af *af;
146
147 primary = &assoc->peer.primary_addr;
148 list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
149 transports) {
150 addr = &transport->ipaddr;
151
152 af = sctp_get_af_specific(addr->sa.sa_family);
153 if (af->cmp_addr(addr, primary)) {
154 seq_printf(seq, "*");
155 }
156 af->seq_dump_addr(seq, addr);
157 }
158}
159
160static void *sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
161{
162 if (*pos >= sctp_ep_hashsize)
163 return NULL;
164
165 if (*pos < 0)
166 *pos = 0;
167
168 if (*pos == 0)
169 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n");
170
171 return (void *)pos;
172}
173
174static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
175{
176}
177
178
179static void *sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
180{
181 if (++*pos >= sctp_ep_hashsize)
182 return NULL;
183
184 return pos;
185}
186
187
188/* Display sctp endpoints (/proc/net/sctp/eps). */
189static int sctp_eps_seq_show(struct seq_file *seq, void *v)
190{
191 struct sctp_hashbucket *head;
192 struct sctp_ep_common *epb;
193 struct sctp_endpoint *ep;
194 struct sock *sk;
195 int hash = *(loff_t *)v;
196
197 if (hash >= sctp_ep_hashsize)
198 return -ENOMEM;
199
200 head = &sctp_ep_hashtable[hash];
201 read_lock_bh(&head->lock);
202 sctp_for_each_hentry(epb, &head->chain) {
203 ep = sctp_ep(epb);
204 sk = epb->sk;
205 if (!net_eq(sock_net(sk), seq_file_net(seq)))
206 continue;
207 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
208 sctp_sk(sk)->type, sk->sk_state, hash,
209 epb->bind_addr.port,
210 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
211 sock_i_ino(sk));
212
213 sctp_seq_dump_local_addrs(seq, epb);
214 seq_printf(seq, "\n");
215 }
216 read_unlock_bh(&head->lock);
217
218 return 0;
219}
220
221static const struct seq_operations sctp_eps_ops = {
222 .start = sctp_eps_seq_start,
223 .next = sctp_eps_seq_next,
224 .stop = sctp_eps_seq_stop,
225 .show = sctp_eps_seq_show,
226};
227
228
229/* Initialize the seq file operations for 'eps' object. */
230static int sctp_eps_seq_open(struct inode *inode, struct file *file)
231{
232 return seq_open_net(inode, file, &sctp_eps_ops,
233 sizeof(struct seq_net_private));
234}
235
236static const struct file_operations sctp_eps_seq_fops = {
237 .open = sctp_eps_seq_open,
238 .read = seq_read,
239 .llseek = seq_lseek,
240 .release = seq_release_net,
241};
242
243struct sctp_ht_iter {
244 struct seq_net_private p;
245 struct rhashtable_iter hti;
246 int start_fail;
247};
248
249static void *sctp_transport_seq_start(struct seq_file *seq, loff_t *pos)
250{
251 struct sctp_ht_iter *iter = seq->private;
252
253 sctp_transport_walk_start(&iter->hti);
254
255 iter->start_fail = 0;
256 return sctp_transport_get_idx(seq_file_net(seq), &iter->hti, *pos);
257}
258
259static void sctp_transport_seq_stop(struct seq_file *seq, void *v)
260{
261 struct sctp_ht_iter *iter = seq->private;
262
263 if (iter->start_fail)
264 return;
265 sctp_transport_walk_stop(&iter->hti);
266}
267
268static void *sctp_transport_seq_next(struct seq_file *seq, void *v, loff_t *pos)
269{
270 struct sctp_ht_iter *iter = seq->private;
271
272 ++*pos;
273
274 return sctp_transport_get_next(seq_file_net(seq), &iter->hti);
275}
276
277/* Display sctp associations (/proc/net/sctp/assocs). */
278static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
279{
280 struct sctp_transport *transport;
281 struct sctp_association *assoc;
282 struct sctp_ep_common *epb;
283 struct sock *sk;
284
285 if (v == SEQ_START_TOKEN) {
286 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
287 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
288 "RPORT LADDRS <-> RADDRS "
289 "HBINT INS OUTS MAXRT T1X T2X RTXC "
290 "wmema wmemq sndbuf rcvbuf\n");
291 return 0;
292 }
293
294 transport = (struct sctp_transport *)v;
295 if (!sctp_transport_hold(transport))
296 return 0;
297 assoc = transport->asoc;
298 epb = &assoc->base;
299 sk = epb->sk;
300
301 seq_printf(seq,
302 "%8pK %8pK %-3d %-3d %-2d %-4d "
303 "%4d %8d %8d %7u %5lu %-5d %5d ",
304 assoc, sk, sctp_sk(sk)->type, sk->sk_state,
305 assoc->state, 0,
306 assoc->assoc_id,
307 assoc->sndbuf_used,
308 atomic_read(&assoc->rmem_alloc),
309 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
310 sock_i_ino(sk),
311 epb->bind_addr.port,
312 assoc->peer.port);
313 seq_printf(seq, " ");
314 sctp_seq_dump_local_addrs(seq, epb);
315 seq_printf(seq, "<-> ");
316 sctp_seq_dump_remote_addrs(seq, assoc);
317 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
318 "%8d %8d %8d %8d",
319 assoc->hbinterval, assoc->stream.incnt,
320 assoc->stream.outcnt, assoc->max_retrans,
321 assoc->init_retries, assoc->shutdown_retries,
322 assoc->rtx_data_chunks,
323 refcount_read(&sk->sk_wmem_alloc),
324 sk->sk_wmem_queued,
325 sk->sk_sndbuf,
326 sk->sk_rcvbuf);
327 seq_printf(seq, "\n");
328
329 sctp_transport_put(transport);
330
331 return 0;
332}
333
334static const struct seq_operations sctp_assoc_ops = {
335 .start = sctp_transport_seq_start,
336 .next = sctp_transport_seq_next,
337 .stop = sctp_transport_seq_stop,
338 .show = sctp_assocs_seq_show,
339};
340
341/* Initialize the seq file operations for 'assocs' object. */
342static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
343{
344 return seq_open_net(inode, file, &sctp_assoc_ops,
345 sizeof(struct sctp_ht_iter));
346}
347
348static const struct file_operations sctp_assocs_seq_fops = {
349 .open = sctp_assocs_seq_open,
350 .read = seq_read,
351 .llseek = seq_lseek,
352 .release = seq_release_net,
353};
354
355static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
356{
357 struct sctp_association *assoc;
358 struct sctp_transport *transport, *tsp;
359
360 if (v == SEQ_START_TOKEN) {
361 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
362 "REM_ADDR_RTX START STATE\n");
363 return 0;
364 }
365
366 transport = (struct sctp_transport *)v;
367 if (!sctp_transport_hold(transport))
368 return 0;
369 assoc = transport->asoc;
370
371 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
372 transports) {
373 /*
374 * The remote address (ADDR)
375 */
376 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
377 seq_printf(seq, " ");
378 /*
379 * The association ID (ASSOC_ID)
380 */
381 seq_printf(seq, "%d ", tsp->asoc->assoc_id);
382
383 /*
384 * If the Heartbeat is active (HB_ACT)
385 * Note: 1 = Active, 0 = Inactive
386 */
387 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
388
389 /*
390 * Retransmit time out (RTO)
391 */
392 seq_printf(seq, "%lu ", tsp->rto);
393
394 /*
395 * Maximum path retransmit count (PATH_MAX_RTX)
396 */
397 seq_printf(seq, "%d ", tsp->pathmaxrxt);
398
399 /*
400 * remote address retransmit count (REM_ADDR_RTX)
401 * Note: We don't have a way to tally this at the moment
402 * so lets just leave it as zero for the moment
403 */
404 seq_puts(seq, "0 ");
405
406 /*
407 * remote address start time (START). This is also not
408 * currently implemented, but we can record it with a
409 * jiffies marker in a subsequent patch
410 */
411 seq_puts(seq, "0 ");
412
413 /*
414 * The current state of this destination. I.e.
415 * SCTP_ACTIVE, SCTP_INACTIVE, ...
416 */
417 seq_printf(seq, "%d", tsp->state);
418
419 seq_printf(seq, "\n");
420 }
421
422 sctp_transport_put(transport);
423
424 return 0;
425}
426
427static const struct seq_operations sctp_remaddr_ops = {
428 .start = sctp_transport_seq_start,
429 .next = sctp_transport_seq_next,
430 .stop = sctp_transport_seq_stop,
431 .show = sctp_remaddr_seq_show,
432};
433
434static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
435{
436 return seq_open_net(inode, file, &sctp_remaddr_ops,
437 sizeof(struct sctp_ht_iter));
438}
439
440static const struct file_operations sctp_remaddr_seq_fops = {
441 .open = sctp_remaddr_seq_open,
442 .read = seq_read,
443 .llseek = seq_lseek,
444 .release = seq_release_net,
445};
446
447/* Set up the proc fs entry for the SCTP protocol. */
448int __net_init sctp_proc_init(struct net *net)
449{
450 net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net);
451 if (!net->sctp.proc_net_sctp)
452 return -ENOMEM;
453 if (!proc_create("snmp", 0444, net->sctp.proc_net_sctp,
454 &sctp_snmp_seq_fops))
455 goto cleanup;
456 if (!proc_create("eps", 0444, net->sctp.proc_net_sctp,
457 &sctp_eps_seq_fops))
458 goto cleanup;
459 if (!proc_create("assocs", 0444, net->sctp.proc_net_sctp,
460 &sctp_assocs_seq_fops))
461 goto cleanup;
462 if (!proc_create("remaddr", 0444, net->sctp.proc_net_sctp,
463 &sctp_remaddr_seq_fops))
464 goto cleanup;
465 return 0;
466
467cleanup:
468 remove_proc_subtree("sctp", net->proc_net);
469 net->sctp.proc_net_sctp = NULL;
470 return -ENOMEM;
471}
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}