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60c778b2 | 1 | /* SCTP kernel implementation |
1da177e4 LT |
2 | * Copyright (c) 2003 International Business Machines, Corp. |
3 | * | |
60c778b2 | 4 | * This file is part of the SCTP kernel implementation |
1da177e4 | 5 | * |
60c778b2 | 6 | * This SCTP implementation is free software; |
1da177e4 LT |
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 | * | |
60c778b2 | 12 | * This SCTP implementation is distributed in the hope that it |
1da177e4 LT |
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 | |
4b2f13a2 JK |
19 | * along with GNU CC; see the file COPYING. If not, see |
20 | * <http://www.gnu.org/licenses/>. | |
1da177e4 LT |
21 | * |
22 | * Please send any bug reports or fixes you make to the | |
23 | * email address(es): | |
91705c61 | 24 | * lksctp developers <linux-sctp@vger.kernel.org> |
1da177e4 | 25 | * |
1da177e4 LT |
26 | * Written or modified by: |
27 | * Sridhar Samudrala <sri@us.ibm.com> | |
1da177e4 LT |
28 | */ |
29 | ||
30 | #include <linux/types.h> | |
31 | #include <linux/seq_file.h> | |
32 | #include <linux/init.h> | |
bc3b2d7f | 33 | #include <linux/export.h> |
1da177e4 | 34 | #include <net/sctp/sctp.h> |
3f5340a6 | 35 | #include <net/ip.h> /* for snmp_fold_field */ |
1da177e4 | 36 | |
5833929c | 37 | static const struct snmp_mib sctp_snmp_list[] = { |
1da177e4 LT |
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), | |
ac0b0462 SS |
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), | |
d2287f84 | 70 | SNMP_MIB_SENTINEL |
1da177e4 LT |
71 | }; |
72 | ||
1da177e4 LT |
73 | /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */ |
74 | static int sctp_snmp_seq_show(struct seq_file *seq, void *v) | |
75 | { | |
7d64a94b | 76 | unsigned long buff[SCTP_MIB_MAX]; |
13d782f6 | 77 | struct net *net = seq->private; |
1da177e4 LT |
78 | int i; |
79 | ||
7d64a94b JH |
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); | |
6d4a741c | 84 | for (i = 0; sctp_snmp_list[i].name; i++) |
1da177e4 | 85 | seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name, |
7d64a94b | 86 | buff[i]); |
1da177e4 LT |
87 | |
88 | return 0; | |
89 | } | |
90 | ||
1da177e4 LT |
91 | /* Dump local addresses of an association/endpoint. */ |
92 | static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb) | |
93 | { | |
bca735bd | 94 | struct sctp_association *asoc; |
1da177e4 | 95 | struct sctp_sockaddr_entry *laddr; |
bca735bd VY |
96 | struct sctp_transport *peer; |
97 | union sctp_addr *addr, *primary = NULL; | |
1da177e4 LT |
98 | struct sctp_af *af; |
99 | ||
bca735bd | 100 | if (epb->type == SCTP_EP_TYPE_ASSOCIATION) { |
f9e42b85 DB |
101 | asoc = sctp_assoc(epb); |
102 | ||
103 | peer = asoc->peer.primary_path; | |
104 | if (unlikely(peer == NULL)) { | |
b527fe69 | 105 | WARN(1, "Association %p with NULL primary path!\n", asoc); |
f9e42b85 DB |
106 | return; |
107 | } | |
108 | ||
109 | primary = &peer->saddr; | |
bca735bd VY |
110 | } |
111 | ||
0b0fe913 TG |
112 | rcu_read_lock(); |
113 | list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) { | |
114 | if (!laddr->valid) | |
115 | continue; | |
116 | ||
5f242a13 | 117 | addr = &laddr->a; |
1da177e4 | 118 | af = sctp_get_af_specific(addr->sa.sa_family); |
bca735bd VY |
119 | if (primary && af->cmp_addr(addr, primary)) { |
120 | seq_printf(seq, "*"); | |
121 | } | |
5f242a13 | 122 | af->seq_dump_addr(seq, addr); |
1da177e4 | 123 | } |
0b0fe913 | 124 | rcu_read_unlock(); |
1da177e4 LT |
125 | } |
126 | ||
127 | /* Dump remote addresses of an association. */ | |
128 | static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc) | |
129 | { | |
1da177e4 | 130 | struct sctp_transport *transport; |
bca735bd | 131 | union sctp_addr *addr, *primary; |
1da177e4 LT |
132 | struct sctp_af *af; |
133 | ||
acd2bc96 | 134 | primary = &assoc->peer.primary_addr; |
45122ca2 | 135 | list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list, |
9dbc15f0 | 136 | transports) { |
5f242a13 | 137 | addr = &transport->ipaddr; |
45122ca2 | 138 | |
1da177e4 | 139 | af = sctp_get_af_specific(addr->sa.sa_family); |
acd2bc96 | 140 | if (af->cmp_addr(addr, primary)) { |
bca735bd VY |
141 | seq_printf(seq, "*"); |
142 | } | |
5f242a13 | 143 | af->seq_dump_addr(seq, addr); |
1da177e4 LT |
144 | } |
145 | } | |
146 | ||
26ac8e5f | 147 | static void *sctp_eps_seq_start(struct seq_file *seq, loff_t *pos) |
bca735bd | 148 | { |
49392e5e | 149 | if (*pos >= sctp_ep_hashsize) |
bca735bd VY |
150 | return NULL; |
151 | ||
152 | if (*pos < 0) | |
153 | *pos = 0; | |
154 | ||
155 | if (*pos == 0) | |
156 | seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n"); | |
157 | ||
bca735bd VY |
158 | return (void *)pos; |
159 | } | |
160 | ||
161 | static void sctp_eps_seq_stop(struct seq_file *seq, void *v) | |
162 | { | |
bca735bd VY |
163 | } |
164 | ||
165 | ||
26ac8e5f | 166 | static void *sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
bca735bd | 167 | { |
49392e5e | 168 | if (++*pos >= sctp_ep_hashsize) |
bca735bd VY |
169 | return NULL; |
170 | ||
bca735bd VY |
171 | return pos; |
172 | } | |
173 | ||
174 | ||
1da177e4 LT |
175 | /* Display sctp endpoints (/proc/net/sctp/eps). */ |
176 | static int sctp_eps_seq_show(struct seq_file *seq, void *v) | |
177 | { | |
178 | struct sctp_hashbucket *head; | |
179 | struct sctp_ep_common *epb; | |
180 | struct sctp_endpoint *ep; | |
181 | struct sock *sk; | |
38b0e42a | 182 | int hash = *(loff_t *)v; |
bca735bd | 183 | |
49392e5e | 184 | if (hash >= sctp_ep_hashsize) |
bca735bd VY |
185 | return -ENOMEM; |
186 | ||
49392e5e | 187 | head = &sctp_ep_hashtable[hash]; |
c0a4c2d1 | 188 | read_lock_bh(&head->lock); |
b67bfe0d | 189 | sctp_for_each_hentry(epb, &head->chain) { |
bca735bd VY |
190 | ep = sctp_ep(epb); |
191 | sk = epb->sk; | |
6932f119 | 192 | if (!net_eq(sock_net(sk), seq_file_net(seq))) |
13d782f6 | 193 | continue; |
d14c5ab6 | 194 | seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk, |
49392e5e | 195 | sctp_sk(sk)->type, sk->sk_state, hash, |
bca735bd | 196 | epb->bind_addr.port, |
a7cb5a49 EB |
197 | from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), |
198 | sock_i_ino(sk)); | |
bca735bd VY |
199 | |
200 | sctp_seq_dump_local_addrs(seq, epb); | |
201 | seq_printf(seq, "\n"); | |
1da177e4 | 202 | } |
c0a4c2d1 | 203 | read_unlock_bh(&head->lock); |
1da177e4 LT |
204 | |
205 | return 0; | |
206 | } | |
207 | ||
56b3d975 | 208 | static const struct seq_operations sctp_eps_ops = { |
bca735bd VY |
209 | .start = sctp_eps_seq_start, |
210 | .next = sctp_eps_seq_next, | |
211 | .stop = sctp_eps_seq_stop, | |
212 | .show = sctp_eps_seq_show, | |
213 | }; | |
214 | ||
39f66a7d XL |
215 | struct sctp_ht_iter { |
216 | struct seq_net_private p; | |
217 | struct rhashtable_iter hti; | |
218 | }; | |
bca735bd | 219 | |
b5e2f4e6 | 220 | static void *sctp_transport_seq_start(struct seq_file *seq, loff_t *pos) |
39f66a7d | 221 | { |
626d16f5 | 222 | struct sctp_ht_iter *iter = seq->private; |
39f66a7d | 223 | |
97a6ec4a | 224 | sctp_transport_walk_start(&iter->hti); |
39f66a7d | 225 | |
626d16f5 | 226 | return sctp_transport_get_idx(seq_file_net(seq), &iter->hti, *pos); |
39f66a7d XL |
227 | } |
228 | ||
b5e2f4e6 | 229 | static void sctp_transport_seq_stop(struct seq_file *seq, void *v) |
39f66a7d | 230 | { |
626d16f5 XL |
231 | struct sctp_ht_iter *iter = seq->private; |
232 | ||
233 | sctp_transport_walk_stop(&iter->hti); | |
39f66a7d | 234 | } |
bca735bd | 235 | |
b5e2f4e6 | 236 | static void *sctp_transport_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
bca735bd | 237 | { |
626d16f5 XL |
238 | struct sctp_ht_iter *iter = seq->private; |
239 | ||
39f66a7d | 240 | ++*pos; |
bca735bd | 241 | |
626d16f5 | 242 | return sctp_transport_get_next(seq_file_net(seq), &iter->hti); |
bca735bd VY |
243 | } |
244 | ||
1da177e4 LT |
245 | /* Display sctp associations (/proc/net/sctp/assocs). */ |
246 | static int sctp_assocs_seq_show(struct seq_file *seq, void *v) | |
247 | { | |
39f66a7d | 248 | struct sctp_transport *transport; |
1da177e4 | 249 | struct sctp_association *assoc; |
39f66a7d | 250 | struct sctp_ep_common *epb; |
1da177e4 | 251 | struct sock *sk; |
bca735bd | 252 | |
39f66a7d XL |
253 | if (v == SEQ_START_TOKEN) { |
254 | seq_printf(seq, " ASSOC SOCK STY SST ST HBKT " | |
255 | "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT " | |
256 | "RPORT LADDRS <-> RADDRS " | |
257 | "HBINT INS OUTS MAXRT T1X T2X RTXC " | |
258 | "wmema wmemq sndbuf rcvbuf\n"); | |
259 | return 0; | |
1da177e4 | 260 | } |
39f66a7d XL |
261 | |
262 | transport = (struct sctp_transport *)v; | |
263 | assoc = transport->asoc; | |
264 | epb = &assoc->base; | |
265 | sk = epb->sk; | |
266 | ||
267 | seq_printf(seq, | |
268 | "%8pK %8pK %-3d %-3d %-2d %-4d " | |
269 | "%4d %8d %8d %7u %5lu %-5d %5d ", | |
270 | assoc, sk, sctp_sk(sk)->type, sk->sk_state, | |
271 | assoc->state, 0, | |
272 | assoc->assoc_id, | |
273 | assoc->sndbuf_used, | |
274 | atomic_read(&assoc->rmem_alloc), | |
275 | from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), | |
276 | sock_i_ino(sk), | |
277 | epb->bind_addr.port, | |
278 | assoc->peer.port); | |
279 | seq_printf(seq, " "); | |
280 | sctp_seq_dump_local_addrs(seq, epb); | |
281 | seq_printf(seq, "<-> "); | |
282 | sctp_seq_dump_remote_addrs(seq, assoc); | |
283 | seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d " | |
284 | "%8d %8d %8d %8d", | |
cee360ab XL |
285 | assoc->hbinterval, assoc->stream.incnt, |
286 | assoc->stream.outcnt, assoc->max_retrans, | |
39f66a7d XL |
287 | assoc->init_retries, assoc->shutdown_retries, |
288 | assoc->rtx_data_chunks, | |
14afee4b | 289 | refcount_read(&sk->sk_wmem_alloc), |
39f66a7d XL |
290 | sk->sk_wmem_queued, |
291 | sk->sk_sndbuf, | |
292 | sk->sk_rcvbuf); | |
293 | seq_printf(seq, "\n"); | |
1da177e4 | 294 | |
fba4c330 XL |
295 | sctp_transport_put(transport); |
296 | ||
1da177e4 LT |
297 | return 0; |
298 | } | |
299 | ||
56b3d975 | 300 | static const struct seq_operations sctp_assoc_ops = { |
b5e2f4e6 XL |
301 | .start = sctp_transport_seq_start, |
302 | .next = sctp_transport_seq_next, | |
303 | .stop = sctp_transport_seq_stop, | |
bca735bd VY |
304 | .show = sctp_assocs_seq_show, |
305 | }; | |
306 | ||
20c2c1fd NH |
307 | static int sctp_remaddr_seq_show(struct seq_file *seq, void *v) |
308 | { | |
20c2c1fd | 309 | struct sctp_association *assoc; |
3d73e8fa | 310 | struct sctp_transport *transport, *tsp; |
20c2c1fd | 311 | |
39f66a7d XL |
312 | if (v == SEQ_START_TOKEN) { |
313 | seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX " | |
314 | "REM_ADDR_RTX START STATE\n"); | |
315 | return 0; | |
316 | } | |
20c2c1fd | 317 | |
3d73e8fa | 318 | transport = (struct sctp_transport *)v; |
3d73e8fa | 319 | assoc = transport->asoc; |
39f66a7d XL |
320 | |
321 | list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list, | |
322 | transports) { | |
39f66a7d XL |
323 | /* |
324 | * The remote address (ADDR) | |
325 | */ | |
326 | tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr); | |
327 | seq_printf(seq, " "); | |
328 | /* | |
329 | * The association ID (ASSOC_ID) | |
330 | */ | |
331 | seq_printf(seq, "%d ", tsp->asoc->assoc_id); | |
332 | ||
333 | /* | |
334 | * If the Heartbeat is active (HB_ACT) | |
335 | * Note: 1 = Active, 0 = Inactive | |
336 | */ | |
337 | seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer)); | |
338 | ||
339 | /* | |
340 | * Retransmit time out (RTO) | |
341 | */ | |
342 | seq_printf(seq, "%lu ", tsp->rto); | |
343 | ||
344 | /* | |
345 | * Maximum path retransmit count (PATH_MAX_RTX) | |
346 | */ | |
347 | seq_printf(seq, "%d ", tsp->pathmaxrxt); | |
348 | ||
349 | /* | |
350 | * remote address retransmit count (REM_ADDR_RTX) | |
351 | * Note: We don't have a way to tally this at the moment | |
352 | * so lets just leave it as zero for the moment | |
353 | */ | |
354 | seq_puts(seq, "0 "); | |
355 | ||
356 | /* | |
357 | * remote address start time (START). This is also not | |
358 | * currently implemented, but we can record it with a | |
359 | * jiffies marker in a subsequent patch | |
360 | */ | |
361 | seq_puts(seq, "0 "); | |
362 | ||
363 | /* | |
364 | * The current state of this destination. I.e. | |
365 | * SCTP_ACTIVE, SCTP_INACTIVE, ... | |
366 | */ | |
367 | seq_printf(seq, "%d", tsp->state); | |
45122ca2 | 368 | |
39f66a7d | 369 | seq_printf(seq, "\n"); |
20c2c1fd NH |
370 | } |
371 | ||
3d73e8fa | 372 | sctp_transport_put(transport); |
fba4c330 | 373 | |
20c2c1fd | 374 | return 0; |
20c2c1fd NH |
375 | } |
376 | ||
377 | static const struct seq_operations sctp_remaddr_ops = { | |
b5e2f4e6 XL |
378 | .start = sctp_transport_seq_start, |
379 | .next = sctp_transport_seq_next, | |
380 | .stop = sctp_transport_seq_stop, | |
20c2c1fd NH |
381 | .show = sctp_remaddr_seq_show, |
382 | }; | |
383 | ||
d47d08c8 AV |
384 | /* Set up the proc fs entry for the SCTP protocol. */ |
385 | int __net_init sctp_proc_init(struct net *net) | |
20c2c1fd | 386 | { |
d47d08c8 AV |
387 | net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net); |
388 | if (!net->sctp.proc_net_sctp) | |
20c2c1fd | 389 | return -ENOMEM; |
3617d949 CH |
390 | if (!proc_create_net_single("snmp", 0444, net->sctp.proc_net_sctp, |
391 | sctp_snmp_seq_show, NULL)) | |
d47d08c8 | 392 | goto cleanup; |
c3506372 CH |
393 | if (!proc_create_net("eps", 0444, net->sctp.proc_net_sctp, |
394 | &sctp_eps_ops, sizeof(struct seq_net_private))) | |
d47d08c8 | 395 | goto cleanup; |
c3506372 CH |
396 | if (!proc_create_net("assocs", 0444, net->sctp.proc_net_sctp, |
397 | &sctp_assoc_ops, sizeof(struct sctp_ht_iter))) | |
d47d08c8 | 398 | goto cleanup; |
c3506372 CH |
399 | if (!proc_create_net("remaddr", 0444, net->sctp.proc_net_sctp, |
400 | &sctp_remaddr_ops, sizeof(struct sctp_ht_iter))) | |
d47d08c8 | 401 | goto cleanup; |
20c2c1fd | 402 | return 0; |
d47d08c8 AV |
403 | |
404 | cleanup: | |
405 | remove_proc_subtree("sctp", net->proc_net); | |
406 | net->sctp.proc_net_sctp = NULL; | |
407 | return -ENOMEM; | |
20c2c1fd | 408 | } |