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15#include <linux/types.h>
16#include <linux/seq_file.h>
17#include <linux/init.h>
18#include <linux/export.h>
19#include <net/sctp/sctp.h>
20#include <net/ip.h>
21
22static const struct snmp_mib sctp_snmp_list[] = {
23 SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB),
24 SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS),
25 SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS),
26 SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS),
27 SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS),
28 SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES),
29 SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS),
30 SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS),
31 SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS),
32 SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS),
33 SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS),
34 SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS),
35 SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS),
36 SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS),
37 SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS),
38 SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS),
39 SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS),
40 SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
41 SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
42 SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
43 SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
44 SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
45 SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
46 SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
47 SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
48 SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
49 SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
50 SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
51 SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
52 SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
53 SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
54 SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
55 SNMP_MIB_SENTINEL
56};
57
58
59static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
60{
61 unsigned long buff[SCTP_MIB_MAX];
62 struct net *net = seq->private;
63 int i;
64
65 memset(buff, 0, sizeof(unsigned long) * SCTP_MIB_MAX);
66
67 snmp_get_cpu_field_batch(buff, sctp_snmp_list,
68 net->sctp.sctp_statistics);
69 for (i = 0; sctp_snmp_list[i].name; i++)
70 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
71 buff[i]);
72
73 return 0;
74}
75
76
77static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
78{
79 struct sctp_association *asoc;
80 struct sctp_sockaddr_entry *laddr;
81 struct sctp_transport *peer;
82 union sctp_addr *addr, *primary = NULL;
83 struct sctp_af *af;
84
85 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
86 asoc = sctp_assoc(epb);
87
88 peer = asoc->peer.primary_path;
89 if (unlikely(peer == NULL)) {
90 WARN(1, "Association %p with NULL primary path!\n", asoc);
91 return;
92 }
93
94 primary = &peer->saddr;
95 }
96
97 rcu_read_lock();
98 list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
99 if (!laddr->valid)
100 continue;
101
102 addr = &laddr->a;
103 af = sctp_get_af_specific(addr->sa.sa_family);
104 if (primary && af->cmp_addr(addr, primary)) {
105 seq_printf(seq, "*");
106 }
107 af->seq_dump_addr(seq, addr);
108 }
109 rcu_read_unlock();
110}
111
112
113static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
114{
115 struct sctp_transport *transport;
116 union sctp_addr *addr, *primary;
117 struct sctp_af *af;
118
119 primary = &assoc->peer.primary_addr;
120 list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
121 transports) {
122 addr = &transport->ipaddr;
123
124 af = sctp_get_af_specific(addr->sa.sa_family);
125 if (af->cmp_addr(addr, primary)) {
126 seq_printf(seq, "*");
127 }
128 af->seq_dump_addr(seq, addr);
129 }
130}
131
132static void *sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
133{
134 if (*pos >= sctp_ep_hashsize)
135 return NULL;
136
137 if (*pos < 0)
138 *pos = 0;
139
140 if (*pos == 0)
141 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n");
142
143 return (void *)pos;
144}
145
146static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
147{
148}
149
150
151static void *sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
152{
153 if (++*pos >= sctp_ep_hashsize)
154 return NULL;
155
156 return pos;
157}
158
159
160
161static int sctp_eps_seq_show(struct seq_file *seq, void *v)
162{
163 struct sctp_hashbucket *head;
164 struct sctp_ep_common *epb;
165 struct sctp_endpoint *ep;
166 struct sock *sk;
167 int hash = *(loff_t *)v;
168
169 if (hash >= sctp_ep_hashsize)
170 return -ENOMEM;
171
172 head = &sctp_ep_hashtable[hash];
173 read_lock_bh(&head->lock);
174 sctp_for_each_hentry(epb, &head->chain) {
175 ep = sctp_ep(epb);
176 sk = epb->sk;
177 if (!net_eq(sock_net(sk), seq_file_net(seq)))
178 continue;
179 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
180 sctp_sk(sk)->type, sk->sk_state, hash,
181 epb->bind_addr.port,
182 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
183 sock_i_ino(sk));
184
185 sctp_seq_dump_local_addrs(seq, epb);
186 seq_printf(seq, "\n");
187 }
188 read_unlock_bh(&head->lock);
189
190 return 0;
191}
192
193static const struct seq_operations sctp_eps_ops = {
194 .start = sctp_eps_seq_start,
195 .next = sctp_eps_seq_next,
196 .stop = sctp_eps_seq_stop,
197 .show = sctp_eps_seq_show,
198};
199
200struct sctp_ht_iter {
201 struct seq_net_private p;
202 struct rhashtable_iter hti;
203};
204
205static void *sctp_transport_seq_start(struct seq_file *seq, loff_t *pos)
206{
207 struct sctp_ht_iter *iter = seq->private;
208
209 sctp_transport_walk_start(&iter->hti);
210
211 return sctp_transport_get_idx(seq_file_net(seq), &iter->hti, *pos);
212}
213
214static void sctp_transport_seq_stop(struct seq_file *seq, void *v)
215{
216 struct sctp_ht_iter *iter = seq->private;
217
218 if (v && v != SEQ_START_TOKEN) {
219 struct sctp_transport *transport = v;
220
221 sctp_transport_put(transport);
222 }
223
224 sctp_transport_walk_stop(&iter->hti);
225}
226
227static void *sctp_transport_seq_next(struct seq_file *seq, void *v, loff_t *pos)
228{
229 struct sctp_ht_iter *iter = seq->private;
230
231 if (v && v != SEQ_START_TOKEN) {
232 struct sctp_transport *transport = v;
233
234 sctp_transport_put(transport);
235 }
236
237 ++*pos;
238
239 return sctp_transport_get_next(seq_file_net(seq), &iter->hti);
240}
241
242
243static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
244{
245 struct sctp_transport *transport;
246 struct sctp_association *assoc;
247 struct sctp_ep_common *epb;
248 struct sock *sk;
249
250 if (v == SEQ_START_TOKEN) {
251 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
252 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
253 "RPORT LADDRS <-> RADDRS "
254 "HBINT INS OUTS MAXRT T1X T2X RTXC "
255 "wmema wmemq sndbuf rcvbuf\n");
256 return 0;
257 }
258
259 transport = (struct sctp_transport *)v;
260 assoc = transport->asoc;
261 epb = &assoc->base;
262 sk = epb->sk;
263
264 seq_printf(seq,
265 "%8pK %8pK %-3d %-3d %-2d %-4d "
266 "%4d %8d %8d %7u %5lu %-5d %5d ",
267 assoc, sk, sctp_sk(sk)->type, sk->sk_state,
268 assoc->state, 0,
269 assoc->assoc_id,
270 assoc->sndbuf_used,
271 atomic_read(&assoc->rmem_alloc),
272 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
273 sock_i_ino(sk),
274 epb->bind_addr.port,
275 assoc->peer.port);
276 seq_printf(seq, " ");
277 sctp_seq_dump_local_addrs(seq, epb);
278 seq_printf(seq, "<-> ");
279 sctp_seq_dump_remote_addrs(seq, assoc);
280 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
281 "%8d %8d %8d %8d",
282 assoc->hbinterval, assoc->stream.incnt,
283 assoc->stream.outcnt, assoc->max_retrans,
284 assoc->init_retries, assoc->shutdown_retries,
285 assoc->rtx_data_chunks,
286 refcount_read(&sk->sk_wmem_alloc),
287 sk->sk_wmem_queued,
288 sk->sk_sndbuf,
289 sk->sk_rcvbuf);
290 seq_printf(seq, "\n");
291
292 return 0;
293}
294
295static const struct seq_operations sctp_assoc_ops = {
296 .start = sctp_transport_seq_start,
297 .next = sctp_transport_seq_next,
298 .stop = sctp_transport_seq_stop,
299 .show = sctp_assocs_seq_show,
300};
301
302static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
303{
304 struct sctp_association *assoc;
305 struct sctp_transport *transport, *tsp;
306
307 if (v == SEQ_START_TOKEN) {
308 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
309 "REM_ADDR_RTX START STATE\n");
310 return 0;
311 }
312
313 transport = (struct sctp_transport *)v;
314 assoc = transport->asoc;
315
316 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
317 transports) {
318
319
320
321 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
322 seq_printf(seq, " ");
323
324
325
326 seq_printf(seq, "%d ", tsp->asoc->assoc_id);
327
328
329
330
331
332 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
333
334
335
336
337 seq_printf(seq, "%lu ", tsp->rto);
338
339
340
341
342 seq_printf(seq, "%d ", tsp->pathmaxrxt);
343
344
345
346
347
348
349 seq_puts(seq, "0 ");
350
351
352
353
354
355
356 seq_puts(seq, "0 ");
357
358
359
360
361
362 seq_printf(seq, "%d", tsp->state);
363
364 seq_printf(seq, "\n");
365 }
366
367 return 0;
368}
369
370static const struct seq_operations sctp_remaddr_ops = {
371 .start = sctp_transport_seq_start,
372 .next = sctp_transport_seq_next,
373 .stop = sctp_transport_seq_stop,
374 .show = sctp_remaddr_seq_show,
375};
376
377
378int __net_init sctp_proc_init(struct net *net)
379{
380 net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net);
381 if (!net->sctp.proc_net_sctp)
382 return -ENOMEM;
383 if (!proc_create_net_single("snmp", 0444, net->sctp.proc_net_sctp,
384 sctp_snmp_seq_show, NULL))
385 goto cleanup;
386 if (!proc_create_net("eps", 0444, net->sctp.proc_net_sctp,
387 &sctp_eps_ops, sizeof(struct seq_net_private)))
388 goto cleanup;
389 if (!proc_create_net("assocs", 0444, net->sctp.proc_net_sctp,
390 &sctp_assoc_ops, sizeof(struct sctp_ht_iter)))
391 goto cleanup;
392 if (!proc_create_net("remaddr", 0444, net->sctp.proc_net_sctp,
393 &sctp_remaddr_ops, sizeof(struct sctp_ht_iter)))
394 goto cleanup;
395 return 0;
396
397cleanup:
398 remove_proc_subtree("sctp", net->proc_net);
399 net->sctp.proc_net_sctp = NULL;
400 return -ENOMEM;
401}
402
