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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
43 static 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). */
80 static 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. */
93 static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
94 {
95 return single_open(file, sctp_snmp_seq_show, NULL);
96 }
97
98 static 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. */
107 int __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. */
119 void sctp_snmp_proc_exit(void)
120 {
121 remove_proc_entry("snmp", proc_net_sctp);
122 }
123
124 /* Dump local addresses of an association/endpoint. */
125 static 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. */
150 static 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
168 static 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
182 static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
183 {
184 }
185
186
187 static 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). */
197 static 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, "%8p %8p %-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
229 static 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. */
238 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
239 {
240 return seq_open(file, &sctp_eps_ops);
241 }
242
243 static 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. */
251 int __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. */
263 void sctp_eps_proc_exit(void)
264 {
265 remove_proc_entry("eps", proc_net_sctp);
266 }
267
268
269 static 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
286 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
287 {
288 }
289
290
291 static 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). */
300 static 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 "%8p %8p %-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
346 static 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. */
354 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
355 {
356 return seq_open(file, &sctp_assoc_ops);
357 }
358
359 static 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. */
367 int __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. */
380 void sctp_assocs_proc_exit(void)
381 {
382 remove_proc_entry("assocs", proc_net_sctp);
383 }
384
385 static 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
400 static 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
408 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
409 {
410 }
411
412 static 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
483 static 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. */
491 void sctp_remaddr_proc_exit(void)
492 {
493 remove_proc_entry("remaddr", proc_net_sctp);
494 }
495
496 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
497 {
498 return seq_open(file, &sctp_remaddr_ops);
499 }
500
501 static 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
508 int __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 }