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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 | return; |
185 | } |
186 | |
187 | |
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). */ |
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, "%8p %8p %-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. */ |
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. */ |
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. */ |
264 | void sctp_eps_proc_exit(void) |
265 | { |
266 | remove_proc_entry("eps", proc_net_sctp); |
267 | } |
268 | |
269 | |
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 | |
287 | static void sctp_assocs_seq_stop(struct seq_file *seq, void *v) |
288 | { |
289 | return; |
290 | } |
291 | |
292 | |
293 | static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
294 | { |
295 | if (++*pos >= sctp_assoc_hashsize) |
296 | return NULL; |
297 | |
298 | return pos; |
299 | } |
300 | |
301 | /* Display sctp associations (/proc/net/sctp/assocs). */ |
302 | static int sctp_assocs_seq_show(struct seq_file *seq, void *v) |
303 | { |
304 | struct sctp_hashbucket *head; |
305 | struct sctp_ep_common *epb; |
306 | struct sctp_association *assoc; |
307 | struct sock *sk; |
308 | struct hlist_node *node; |
309 | int hash = *(loff_t *)v; |
310 | |
311 | if (hash >= sctp_assoc_hashsize) |
312 | return -ENOMEM; |
313 | |
314 | head = &sctp_assoc_hashtable[hash]; |
315 | sctp_local_bh_disable(); |
316 | read_lock(&head->lock); |
317 | sctp_for_each_hentry(epb, node, &head->chain) { |
318 | assoc = sctp_assoc(epb); |
319 | sk = epb->sk; |
320 | seq_printf(seq, |
321 | "%8p %8p %-3d %-3d %-2d %-4d " |
322 | "%4d %8d %8d %7d %5lu %-5d %5d ", |
323 | assoc, sk, sctp_sk(sk)->type, sk->sk_state, |
324 | assoc->state, hash, |
325 | assoc->assoc_id, |
326 | assoc->sndbuf_used, |
327 | atomic_read(&assoc->rmem_alloc), |
328 | sock_i_uid(sk), sock_i_ino(sk), |
329 | epb->bind_addr.port, |
330 | assoc->peer.port); |
331 | seq_printf(seq, " "); |
332 | sctp_seq_dump_local_addrs(seq, epb); |
333 | seq_printf(seq, "<-> "); |
334 | sctp_seq_dump_remote_addrs(seq, assoc); |
335 | seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d ", |
336 | assoc->hbinterval, assoc->c.sinit_max_instreams, |
337 | assoc->c.sinit_num_ostreams, assoc->max_retrans, |
338 | assoc->init_retries, assoc->shutdown_retries, |
339 | assoc->rtx_data_chunks); |
340 | seq_printf(seq, "\n"); |
341 | } |
342 | read_unlock(&head->lock); |
343 | sctp_local_bh_enable(); |
344 | |
345 | return 0; |
346 | } |
347 | |
348 | static const struct seq_operations sctp_assoc_ops = { |
349 | .start = sctp_assocs_seq_start, |
350 | .next = sctp_assocs_seq_next, |
351 | .stop = sctp_assocs_seq_stop, |
352 | .show = sctp_assocs_seq_show, |
353 | }; |
354 | |
355 | /* Initialize the seq file operations for 'assocs' object. */ |
356 | static int sctp_assocs_seq_open(struct inode *inode, struct file *file) |
357 | { |
358 | return seq_open(file, &sctp_assoc_ops); |
359 | } |
360 | |
361 | static const struct file_operations sctp_assocs_seq_fops = { |
362 | .open = sctp_assocs_seq_open, |
363 | .read = seq_read, |
364 | .llseek = seq_lseek, |
365 | .release = seq_release, |
366 | }; |
367 | |
368 | /* Set up the proc fs entry for 'assocs' object. */ |
369 | int __init sctp_assocs_proc_init(void) |
370 | { |
371 | struct proc_dir_entry *p; |
372 | |
373 | p = proc_create("assocs", S_IRUGO, proc_net_sctp, |
374 | &sctp_assocs_seq_fops); |
375 | if (!p) |
376 | return -ENOMEM; |
377 | |
378 | return 0; |
379 | } |
380 | |
381 | /* Cleanup the proc fs entry for 'assocs' object. */ |
382 | void sctp_assocs_proc_exit(void) |
383 | { |
384 | remove_proc_entry("assocs", proc_net_sctp); |
385 | } |
386 | |
387 | static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos) |
388 | { |
389 | if (*pos >= sctp_assoc_hashsize) |
390 | return NULL; |
391 | |
392 | if (*pos < 0) |
393 | *pos = 0; |
394 | |
395 | if (*pos == 0) |
396 | seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX " |
397 | "REM_ADDR_RTX START\n"); |
398 | |
399 | return (void *)pos; |
400 | } |
401 | |
402 | static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
403 | { |
404 | if (++*pos >= sctp_assoc_hashsize) |
405 | return NULL; |
406 | |
407 | return pos; |
408 | } |
409 | |
410 | static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v) |
411 | { |
412 | return; |
413 | } |
414 | |
415 | static int sctp_remaddr_seq_show(struct seq_file *seq, void *v) |
416 | { |
417 | struct sctp_hashbucket *head; |
418 | struct sctp_ep_common *epb; |
419 | struct sctp_association *assoc; |
420 | struct hlist_node *node; |
421 | struct sctp_transport *tsp; |
422 | int hash = *(loff_t *)v; |
423 | |
424 | if (hash >= sctp_assoc_hashsize) |
425 | return -ENOMEM; |
426 | |
427 | head = &sctp_assoc_hashtable[hash]; |
428 | sctp_local_bh_disable(); |
429 | read_lock(&head->lock); |
430 | sctp_for_each_hentry(epb, node, &head->chain) { |
431 | assoc = sctp_assoc(epb); |
432 | list_for_each_entry(tsp, &assoc->peer.transport_addr_list, |
433 | transports) { |
434 | /* |
435 | * The remote address (ADDR) |
436 | */ |
437 | tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr); |
438 | seq_printf(seq, " "); |
439 | |
440 | /* |
441 | * The association ID (ASSOC_ID) |
442 | */ |
443 | seq_printf(seq, "%d ", tsp->asoc->assoc_id); |
444 | |
445 | /* |
446 | * If the Heartbeat is active (HB_ACT) |
447 | * Note: 1 = Active, 0 = Inactive |
448 | */ |
449 | seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer)); |
450 | |
451 | /* |
452 | * Retransmit time out (RTO) |
453 | */ |
454 | seq_printf(seq, "%lu ", tsp->rto); |
455 | |
456 | /* |
457 | * Maximum path retransmit count (PATH_MAX_RTX) |
458 | */ |
459 | seq_printf(seq, "%d ", tsp->pathmaxrxt); |
460 | |
461 | /* |
462 | * remote address retransmit count (REM_ADDR_RTX) |
463 | * Note: We don't have a way to tally this at the moment |
464 | * so lets just leave it as zero for the moment |
465 | */ |
466 | seq_printf(seq, "0 "); |
467 | |
468 | /* |
469 | * remote address start time (START). This is also not |
470 | * currently implemented, but we can record it with a |
471 | * jiffies marker in a subsequent patch |
472 | */ |
473 | seq_printf(seq, "0"); |
474 | |
475 | seq_printf(seq, "\n"); |
476 | } |
477 | } |
478 | |
479 | read_unlock(&head->lock); |
480 | sctp_local_bh_enable(); |
481 | |
482 | return 0; |
483 | |
484 | } |
485 | |
486 | static const struct seq_operations sctp_remaddr_ops = { |
487 | .start = sctp_remaddr_seq_start, |
488 | .next = sctp_remaddr_seq_next, |
489 | .stop = sctp_remaddr_seq_stop, |
490 | .show = sctp_remaddr_seq_show, |
491 | }; |
492 | |
493 | /* Cleanup the proc fs entry for 'remaddr' object. */ |
494 | void sctp_remaddr_proc_exit(void) |
495 | { |
496 | remove_proc_entry("remaddr", proc_net_sctp); |
497 | } |
498 | |
499 | static int sctp_remaddr_seq_open(struct inode *inode, struct file *file) |
500 | { |
501 | return seq_open(file, &sctp_remaddr_ops); |
502 | } |
503 | |
504 | static const struct file_operations sctp_remaddr_seq_fops = { |
505 | .open = sctp_remaddr_seq_open, |
506 | .read = seq_read, |
507 | .llseek = seq_lseek, |
508 | .release = seq_release, |
509 | }; |
510 | |
511 | int __init sctp_remaddr_proc_init(void) |
512 | { |
513 | struct proc_dir_entry *p; |
514 | |
515 | p = proc_create("remaddr", S_IRUGO, proc_net_sctp, &sctp_remaddr_seq_fops); |
516 | if (!p) |
517 | return -ENOMEM; |
518 | return 0; |
519 | } |
520 |
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