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 <linux/export.h>
41 #include <net/sctp/sctp.h>
42 #include <net/ip.h> /* for snmp_fold_field */
43
44 static const struct snmp_mib sctp_snmp_list[] = {
45 SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB),
46 SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS),
47 SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS),
48 SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS),
49 SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS),
50 SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES),
51 SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS),
52 SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS),
53 SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS),
54 SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS),
55 SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS),
56 SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS),
57 SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS),
58 SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS),
59 SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS),
60 SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS),
61 SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS),
62 SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
63 SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
64 SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
65 SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
66 SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
67 SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
68 SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
69 SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
70 SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
71 SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
72 SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
73 SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
74 SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
75 SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
76 SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
77 SNMP_MIB_SENTINEL
78 };
79
80 /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
sctp_snmp_seq_show(struct seq_file * seq,void * v)81 static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
82 {
83 int i;
84
85 for (i = 0; sctp_snmp_list[i].name != NULL; i++)
86 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
87 snmp_fold_field((void __percpu **)sctp_statistics,
88 sctp_snmp_list[i].entry));
89
90 return 0;
91 }
92
93 /* Initialize the seq file operations for 'snmp' object. */
sctp_snmp_seq_open(struct inode * inode,struct file * file)94 static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
95 {
96 return single_open(file, sctp_snmp_seq_show, NULL);
97 }
98
99 static const struct file_operations sctp_snmp_seq_fops = {
100 .owner = THIS_MODULE,
101 .open = sctp_snmp_seq_open,
102 .read = seq_read,
103 .llseek = seq_lseek,
104 .release = single_release,
105 };
106
107 /* Set up the proc fs entry for 'snmp' object. */
sctp_snmp_proc_init(void)108 int __init sctp_snmp_proc_init(void)
109 {
110 struct proc_dir_entry *p;
111
112 p = proc_create("snmp", S_IRUGO, proc_net_sctp, &sctp_snmp_seq_fops);
113 if (!p)
114 return -ENOMEM;
115
116 return 0;
117 }
118
119 /* Cleanup the proc fs entry for 'snmp' object. */
sctp_snmp_proc_exit(void)120 void sctp_snmp_proc_exit(void)
121 {
122 remove_proc_entry("snmp", proc_net_sctp);
123 }
124
125 /* Dump local addresses of an association/endpoint. */
sctp_seq_dump_local_addrs(struct seq_file * seq,struct sctp_ep_common * epb)126 static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
127 {
128 struct sctp_association *asoc;
129 struct sctp_sockaddr_entry *laddr;
130 struct sctp_transport *peer;
131 union sctp_addr *addr, *primary = NULL;
132 struct sctp_af *af;
133
134 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
135 asoc = sctp_assoc(epb);
136 peer = asoc->peer.primary_path;
137 primary = &peer->saddr;
138 }
139
140 list_for_each_entry(laddr, &epb->bind_addr.address_list, list) {
141 addr = &laddr->a;
142 af = sctp_get_af_specific(addr->sa.sa_family);
143 if (primary && af->cmp_addr(addr, primary)) {
144 seq_printf(seq, "*");
145 }
146 af->seq_dump_addr(seq, addr);
147 }
148 }
149
150 /* Dump remote addresses of an association. */
sctp_seq_dump_remote_addrs(struct seq_file * seq,struct sctp_association * assoc)151 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
152 {
153 struct sctp_transport *transport;
154 union sctp_addr *addr, *primary;
155 struct sctp_af *af;
156
157 primary = &assoc->peer.primary_addr;
158 list_for_each_entry(transport, &assoc->peer.transport_addr_list,
159 transports) {
160 addr = &transport->ipaddr;
161 af = sctp_get_af_specific(addr->sa.sa_family);
162 if (af->cmp_addr(addr, primary)) {
163 seq_printf(seq, "*");
164 }
165 af->seq_dump_addr(seq, addr);
166 }
167 }
168
sctp_eps_seq_start(struct seq_file * seq,loff_t * pos)169 static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
170 {
171 if (*pos >= sctp_ep_hashsize)
172 return NULL;
173
174 if (*pos < 0)
175 *pos = 0;
176
177 if (*pos == 0)
178 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n");
179
180 return (void *)pos;
181 }
182
sctp_eps_seq_stop(struct seq_file * seq,void * v)183 static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
184 {
185 }
186
187
sctp_eps_seq_next(struct seq_file * seq,void * v,loff_t * pos)188 static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
189 {
190 if (++*pos >= sctp_ep_hashsize)
191 return NULL;
192
193 return pos;
194 }
195
196
197 /* Display sctp endpoints (/proc/net/sctp/eps). */
sctp_eps_seq_show(struct seq_file * seq,void * v)198 static int sctp_eps_seq_show(struct seq_file *seq, void *v)
199 {
200 struct sctp_hashbucket *head;
201 struct sctp_ep_common *epb;
202 struct sctp_endpoint *ep;
203 struct sock *sk;
204 struct hlist_node *node;
205 int hash = *(loff_t *)v;
206
207 if (hash >= sctp_ep_hashsize)
208 return -ENOMEM;
209
210 head = &sctp_ep_hashtable[hash];
211 sctp_local_bh_disable();
212 read_lock(&head->lock);
213 sctp_for_each_hentry(epb, node, &head->chain) {
214 ep = sctp_ep(epb);
215 sk = epb->sk;
216 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk,
217 sctp_sk(sk)->type, sk->sk_state, hash,
218 epb->bind_addr.port,
219 sock_i_uid(sk), sock_i_ino(sk));
220
221 sctp_seq_dump_local_addrs(seq, epb);
222 seq_printf(seq, "\n");
223 }
224 read_unlock(&head->lock);
225 sctp_local_bh_enable();
226
227 return 0;
228 }
229
230 static const struct seq_operations sctp_eps_ops = {
231 .start = sctp_eps_seq_start,
232 .next = sctp_eps_seq_next,
233 .stop = sctp_eps_seq_stop,
234 .show = sctp_eps_seq_show,
235 };
236
237
238 /* Initialize the seq file operations for 'eps' object. */
sctp_eps_seq_open(struct inode * inode,struct file * file)239 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
240 {
241 return seq_open(file, &sctp_eps_ops);
242 }
243
244 static const struct file_operations sctp_eps_seq_fops = {
245 .open = sctp_eps_seq_open,
246 .read = seq_read,
247 .llseek = seq_lseek,
248 .release = seq_release,
249 };
250
251 /* Set up the proc fs entry for 'eps' object. */
sctp_eps_proc_init(void)252 int __init sctp_eps_proc_init(void)
253 {
254 struct proc_dir_entry *p;
255
256 p = proc_create("eps", S_IRUGO, proc_net_sctp, &sctp_eps_seq_fops);
257 if (!p)
258 return -ENOMEM;
259
260 return 0;
261 }
262
263 /* Cleanup the proc fs entry for 'eps' object. */
sctp_eps_proc_exit(void)264 void sctp_eps_proc_exit(void)
265 {
266 remove_proc_entry("eps", proc_net_sctp);
267 }
268
269
sctp_assocs_seq_start(struct seq_file * seq,loff_t * pos)270 static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
271 {
272 if (*pos >= sctp_assoc_hashsize)
273 return NULL;
274
275 if (*pos < 0)
276 *pos = 0;
277
278 if (*pos == 0)
279 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
280 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
281 "RPORT LADDRS <-> RADDRS "
282 "HBINT INS OUTS MAXRT T1X T2X RTXC\n");
283
284 return (void *)pos;
285 }
286
sctp_assocs_seq_stop(struct seq_file * seq,void * v)287 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
288 {
289 }
290
291
sctp_assocs_seq_next(struct seq_file * seq,void * v,loff_t * pos)292 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
293 {
294 if (++*pos >= sctp_assoc_hashsize)
295 return NULL;
296
297 return pos;
298 }
299
300 /* Display sctp associations (/proc/net/sctp/assocs). */
sctp_assocs_seq_show(struct seq_file * seq,void * v)301 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
302 {
303 struct sctp_hashbucket *head;
304 struct sctp_ep_common *epb;
305 struct sctp_association *assoc;
306 struct sock *sk;
307 struct hlist_node *node;
308 int hash = *(loff_t *)v;
309
310 if (hash >= sctp_assoc_hashsize)
311 return -ENOMEM;
312
313 head = &sctp_assoc_hashtable[hash];
314 sctp_local_bh_disable();
315 read_lock(&head->lock);
316 sctp_for_each_hentry(epb, node, &head->chain) {
317 assoc = sctp_assoc(epb);
318 sk = epb->sk;
319 seq_printf(seq,
320 "%8pK %8pK %-3d %-3d %-2d %-4d "
321 "%4d %8d %8d %7d %5lu %-5d %5d ",
322 assoc, sk, sctp_sk(sk)->type, sk->sk_state,
323 assoc->state, hash,
324 assoc->assoc_id,
325 assoc->sndbuf_used,
326 atomic_read(&assoc->rmem_alloc),
327 sock_i_uid(sk), sock_i_ino(sk),
328 epb->bind_addr.port,
329 assoc->peer.port);
330 seq_printf(seq, " ");
331 sctp_seq_dump_local_addrs(seq, epb);
332 seq_printf(seq, "<-> ");
333 sctp_seq_dump_remote_addrs(seq, assoc);
334 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d ",
335 assoc->hbinterval, assoc->c.sinit_max_instreams,
336 assoc->c.sinit_num_ostreams, assoc->max_retrans,
337 assoc->init_retries, assoc->shutdown_retries,
338 assoc->rtx_data_chunks);
339 seq_printf(seq, "\n");
340 }
341 read_unlock(&head->lock);
342 sctp_local_bh_enable();
343
344 return 0;
345 }
346
347 static const struct seq_operations sctp_assoc_ops = {
348 .start = sctp_assocs_seq_start,
349 .next = sctp_assocs_seq_next,
350 .stop = sctp_assocs_seq_stop,
351 .show = sctp_assocs_seq_show,
352 };
353
354 /* Initialize the seq file operations for 'assocs' object. */
sctp_assocs_seq_open(struct inode * inode,struct file * file)355 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
356 {
357 return seq_open(file, &sctp_assoc_ops);
358 }
359
360 static const struct file_operations sctp_assocs_seq_fops = {
361 .open = sctp_assocs_seq_open,
362 .read = seq_read,
363 .llseek = seq_lseek,
364 .release = seq_release,
365 };
366
367 /* Set up the proc fs entry for 'assocs' object. */
sctp_assocs_proc_init(void)368 int __init sctp_assocs_proc_init(void)
369 {
370 struct proc_dir_entry *p;
371
372 p = proc_create("assocs", S_IRUGO, proc_net_sctp,
373 &sctp_assocs_seq_fops);
374 if (!p)
375 return -ENOMEM;
376
377 return 0;
378 }
379
380 /* Cleanup the proc fs entry for 'assocs' object. */
sctp_assocs_proc_exit(void)381 void sctp_assocs_proc_exit(void)
382 {
383 remove_proc_entry("assocs", proc_net_sctp);
384 }
385
sctp_remaddr_seq_start(struct seq_file * seq,loff_t * pos)386 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
387 {
388 if (*pos >= sctp_assoc_hashsize)
389 return NULL;
390
391 if (*pos < 0)
392 *pos = 0;
393
394 if (*pos == 0)
395 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
396 "REM_ADDR_RTX START\n");
397
398 return (void *)pos;
399 }
400
sctp_remaddr_seq_next(struct seq_file * seq,void * v,loff_t * pos)401 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos)
402 {
403 if (++*pos >= sctp_assoc_hashsize)
404 return NULL;
405
406 return pos;
407 }
408
sctp_remaddr_seq_stop(struct seq_file * seq,void * v)409 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
410 {
411 }
412
sctp_remaddr_seq_show(struct seq_file * seq,void * v)413 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
414 {
415 struct sctp_hashbucket *head;
416 struct sctp_ep_common *epb;
417 struct sctp_association *assoc;
418 struct hlist_node *node;
419 struct sctp_transport *tsp;
420 int hash = *(loff_t *)v;
421
422 if (hash >= sctp_assoc_hashsize)
423 return -ENOMEM;
424
425 head = &sctp_assoc_hashtable[hash];
426 sctp_local_bh_disable();
427 read_lock(&head->lock);
428 sctp_for_each_hentry(epb, node, &head->chain) {
429 assoc = sctp_assoc(epb);
430 list_for_each_entry(tsp, &assoc->peer.transport_addr_list,
431 transports) {
432 /*
433 * The remote address (ADDR)
434 */
435 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
436 seq_printf(seq, " ");
437
438 /*
439 * The association ID (ASSOC_ID)
440 */
441 seq_printf(seq, "%d ", tsp->asoc->assoc_id);
442
443 /*
444 * If the Heartbeat is active (HB_ACT)
445 * Note: 1 = Active, 0 = Inactive
446 */
447 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
448
449 /*
450 * Retransmit time out (RTO)
451 */
452 seq_printf(seq, "%lu ", tsp->rto);
453
454 /*
455 * Maximum path retransmit count (PATH_MAX_RTX)
456 */
457 seq_printf(seq, "%d ", tsp->pathmaxrxt);
458
459 /*
460 * remote address retransmit count (REM_ADDR_RTX)
461 * Note: We don't have a way to tally this at the moment
462 * so lets just leave it as zero for the moment
463 */
464 seq_printf(seq, "0 ");
465
466 /*
467 * remote address start time (START). This is also not
468 * currently implemented, but we can record it with a
469 * jiffies marker in a subsequent patch
470 */
471 seq_printf(seq, "0");
472
473 seq_printf(seq, "\n");
474 }
475 }
476
477 read_unlock(&head->lock);
478 sctp_local_bh_enable();
479
480 return 0;
481
482 }
483
484 static const struct seq_operations sctp_remaddr_ops = {
485 .start = sctp_remaddr_seq_start,
486 .next = sctp_remaddr_seq_next,
487 .stop = sctp_remaddr_seq_stop,
488 .show = sctp_remaddr_seq_show,
489 };
490
491 /* Cleanup the proc fs entry for 'remaddr' object. */
sctp_remaddr_proc_exit(void)492 void sctp_remaddr_proc_exit(void)
493 {
494 remove_proc_entry("remaddr", proc_net_sctp);
495 }
496
sctp_remaddr_seq_open(struct inode * inode,struct file * file)497 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
498 {
499 return seq_open(file, &sctp_remaddr_ops);
500 }
501
502 static const struct file_operations sctp_remaddr_seq_fops = {
503 .open = sctp_remaddr_seq_open,
504 .read = seq_read,
505 .llseek = seq_lseek,
506 .release = seq_release,
507 };
508
sctp_remaddr_proc_init(void)509 int __init sctp_remaddr_proc_init(void)
510 {
511 struct proc_dir_entry *p;
512
513 p = proc_create("remaddr", S_IRUGO, proc_net_sctp, &sctp_remaddr_seq_fops);
514 if (!p)
515 return -ENOMEM;
516 return 0;
517 }
518