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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 | } |
517 |
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