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30#include <linux/types.h>
31#include <linux/seq_file.h>
32#include <linux/init.h>
33#include <linux/export.h>
34#include <net/sctp/sctp.h>
35#include <net/ip.h>
36
37static const struct snmp_mib sctp_snmp_list[] = {
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),
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),
70 SNMP_MIB_SENTINEL
71};
72
73
74static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
75{
76 unsigned long buff[SCTP_MIB_MAX];
77 struct net *net = seq->private;
78 int i;
79
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);
84 for (i = 0; sctp_snmp_list[i].name; i++)
85 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
86 buff[i]);
87
88 return 0;
89}
90
91
92static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
93{
94 struct sctp_association *asoc;
95 struct sctp_sockaddr_entry *laddr;
96 struct sctp_transport *peer;
97 union sctp_addr *addr, *primary = NULL;
98 struct sctp_af *af;
99
100 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
101 asoc = sctp_assoc(epb);
102
103 peer = asoc->peer.primary_path;
104 if (unlikely(peer == NULL)) {
105 WARN(1, "Association %p with NULL primary path!\n", asoc);
106 return;
107 }
108
109 primary = &peer->saddr;
110 }
111
112 rcu_read_lock();
113 list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
114 if (!laddr->valid)
115 continue;
116
117 addr = &laddr->a;
118 af = sctp_get_af_specific(addr->sa.sa_family);
119 if (primary && af->cmp_addr(addr, primary)) {
120 seq_printf(seq, "*");
121 }
122 af->seq_dump_addr(seq, addr);
123 }
124 rcu_read_unlock();
125}
126
127
128static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
129{
130 struct sctp_transport *transport;
131 union sctp_addr *addr, *primary;
132 struct sctp_af *af;
133
134 primary = &assoc->peer.primary_addr;
135 list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
136 transports) {
137 addr = &transport->ipaddr;
138
139 af = sctp_get_af_specific(addr->sa.sa_family);
140 if (af->cmp_addr(addr, primary)) {
141 seq_printf(seq, "*");
142 }
143 af->seq_dump_addr(seq, addr);
144 }
145}
146
147static void *sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
148{
149 if (*pos >= sctp_ep_hashsize)
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
158 return (void *)pos;
159}
160
161static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
162{
163}
164
165
166static void *sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
167{
168 if (++*pos >= sctp_ep_hashsize)
169 return NULL;
170
171 return pos;
172}
173
174
175
176static 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;
182 int hash = *(loff_t *)v;
183
184 if (hash >= sctp_ep_hashsize)
185 return -ENOMEM;
186
187 head = &sctp_ep_hashtable[hash];
188 read_lock_bh(&head->lock);
189 sctp_for_each_hentry(epb, &head->chain) {
190 ep = sctp_ep(epb);
191 sk = epb->sk;
192 if (!net_eq(sock_net(sk), seq_file_net(seq)))
193 continue;
194 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
195 sctp_sk(sk)->type, sk->sk_state, hash,
196 epb->bind_addr.port,
197 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
198 sock_i_ino(sk));
199
200 sctp_seq_dump_local_addrs(seq, epb);
201 seq_printf(seq, "\n");
202 }
203 read_unlock_bh(&head->lock);
204
205 return 0;
206}
207
208static const struct seq_operations sctp_eps_ops = {
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
215struct sctp_ht_iter {
216 struct seq_net_private p;
217 struct rhashtable_iter hti;
218};
219
220static void *sctp_transport_seq_start(struct seq_file *seq, loff_t *pos)
221{
222 struct sctp_ht_iter *iter = seq->private;
223
224 sctp_transport_walk_start(&iter->hti);
225
226 return sctp_transport_get_idx(seq_file_net(seq), &iter->hti, *pos);
227}
228
229static void sctp_transport_seq_stop(struct seq_file *seq, void *v)
230{
231 struct sctp_ht_iter *iter = seq->private;
232
233 sctp_transport_walk_stop(&iter->hti);
234}
235
236static void *sctp_transport_seq_next(struct seq_file *seq, void *v, loff_t *pos)
237{
238 struct sctp_ht_iter *iter = seq->private;
239
240 ++*pos;
241
242 return sctp_transport_get_next(seq_file_net(seq), &iter->hti);
243}
244
245
246static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
247{
248 struct sctp_transport *transport;
249 struct sctp_association *assoc;
250 struct sctp_ep_common *epb;
251 struct sock *sk;
252
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;
260 }
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",
285 assoc->hbinterval, assoc->stream.incnt,
286 assoc->stream.outcnt, assoc->max_retrans,
287 assoc->init_retries, assoc->shutdown_retries,
288 assoc->rtx_data_chunks,
289 refcount_read(&sk->sk_wmem_alloc),
290 sk->sk_wmem_queued,
291 sk->sk_sndbuf,
292 sk->sk_rcvbuf);
293 seq_printf(seq, "\n");
294
295 sctp_transport_put(transport);
296
297 return 0;
298}
299
300static const struct seq_operations sctp_assoc_ops = {
301 .start = sctp_transport_seq_start,
302 .next = sctp_transport_seq_next,
303 .stop = sctp_transport_seq_stop,
304 .show = sctp_assocs_seq_show,
305};
306
307static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
308{
309 struct sctp_association *assoc;
310 struct sctp_transport *transport, *tsp;
311
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 }
317
318 transport = (struct sctp_transport *)v;
319 assoc = transport->asoc;
320
321 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
322 transports) {
323
324
325
326 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
327 seq_printf(seq, " ");
328
329
330
331 seq_printf(seq, "%d ", tsp->asoc->assoc_id);
332
333
334
335
336
337 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
338
339
340
341
342 seq_printf(seq, "%lu ", tsp->rto);
343
344
345
346
347 seq_printf(seq, "%d ", tsp->pathmaxrxt);
348
349
350
351
352
353
354 seq_puts(seq, "0 ");
355
356
357
358
359
360
361 seq_puts(seq, "0 ");
362
363
364
365
366
367 seq_printf(seq, "%d", tsp->state);
368
369 seq_printf(seq, "\n");
370 }
371
372 sctp_transport_put(transport);
373
374 return 0;
375}
376
377static const struct seq_operations sctp_remaddr_ops = {
378 .start = sctp_transport_seq_start,
379 .next = sctp_transport_seq_next,
380 .stop = sctp_transport_seq_stop,
381 .show = sctp_remaddr_seq_show,
382};
383
384
385int __net_init sctp_proc_init(struct net *net)
386{
387 net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net);
388 if (!net->sctp.proc_net_sctp)
389 return -ENOMEM;
390 if (!proc_create_net_single("snmp", 0444, net->sctp.proc_net_sctp,
391 sctp_snmp_seq_show, NULL))
392 goto cleanup;
393 if (!proc_create_net("eps", 0444, net->sctp.proc_net_sctp,
394 &sctp_eps_ops, sizeof(struct seq_net_private)))
395 goto cleanup;
396 if (!proc_create_net("assocs", 0444, net->sctp.proc_net_sctp,
397 &sctp_assoc_ops, sizeof(struct sctp_ht_iter)))
398 goto cleanup;
399 if (!proc_create_net("remaddr", 0444, net->sctp.proc_net_sctp,
400 &sctp_remaddr_ops, sizeof(struct sctp_ht_iter)))
401 goto cleanup;
402 return 0;
403
404cleanup:
405 remove_proc_subtree("sctp", net->proc_net);
406 net->sctp.proc_net_sctp = NULL;
407 return -ENOMEM;
408}
409
