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Vlad Yasevich60c778b2008-01-11 09:57:09 -05001/* SCTP kernel implementation
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Copyright (c) 2003 International Business Machines, Corp.
3 *
Vlad Yasevich60c778b2008-01-11 09:57:09 -05004 * This file is part of the SCTP kernel implementation
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 *
Vlad Yasevich60c778b2008-01-11 09:57:09 -05006 * This SCTP implementation is free software;
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * 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 *
Vlad Yasevich60c778b2008-01-11 09:57:09 -050012 * This SCTP implementation is distributed in the hope that it
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 * 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
Jeff Kirsher4b2f13a2013-12-06 06:28:48 -080019 * along with GNU CC; see the file COPYING. If not, see
20 * <http://www.gnu.org/licenses/>.
Linus Torvalds1da177e2005-04-16 15:20:36 -070021 *
22 * Please send any bug reports or fixes you make to the
23 * email address(es):
Daniel Borkmann91705c62013-07-23 14:51:47 +020024 * lksctp developers <linux-sctp@vger.kernel.org>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 * Written or modified by:
27 * Sridhar Samudrala <sri@us.ibm.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028 */
29
30#include <linux/types.h>
31#include <linux/seq_file.h>
32#include <linux/init.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040033#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <net/sctp/sctp.h>
Pavel Emelyanov3f5340a2008-02-09 23:23:44 -080035#include <net/ip.h> /* for snmp_fold_field */
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
Alexey Dobriyan58339292010-01-22 10:17:26 +000037static const struct snmp_mib sctp_snmp_list[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 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),
Sridhar Samudralaac0b0462006-08-22 00:15:33 -070055 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),
Vlad Yasevichd2287f82005-08-23 10:12:04 -070070 SNMP_MIB_SENTINEL
Linus Torvalds1da177e2005-04-16 15:20:36 -070071};
72
Linus Torvalds1da177e2005-04-16 15:20:36 -070073/* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
74static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
75{
Jia He7d64a942016-09-30 11:29:01 +080076 unsigned long buff[SCTP_MIB_MAX];
Eric W. Biederman13d782f2012-08-06 08:45:15 +000077 struct net *net = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 int i;
79
Jia He7d64a942016-09-30 11:29:01 +080080 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);
Jia He6d4a7412016-09-30 11:29:04 +080084 for (i = 0; sctp_snmp_list[i].name; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
Jia He7d64a942016-09-30 11:29:01 +080086 buff[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
88 return 0;
89}
90
Linus Torvalds1da177e2005-04-16 15:20:36 -070091/* Dump local addresses of an association/endpoint. */
92static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
93{
Vladislav Yasevichbca735b2005-06-13 15:11:57 -070094 struct sctp_association *asoc;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 struct sctp_sockaddr_entry *laddr;
Vladislav Yasevichbca735b2005-06-13 15:11:57 -070096 struct sctp_transport *peer;
97 union sctp_addr *addr, *primary = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 struct sctp_af *af;
99
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700100 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
Daniel Borkmannf9e42b82013-06-14 18:24:04 +0200101 asoc = sctp_assoc(epb);
102
103 peer = asoc->peer.primary_path;
104 if (unlikely(peer == NULL)) {
Daniel Borkmannb527fe62013-06-25 18:17:28 +0200105 WARN(1, "Association %p with NULL primary path!\n", asoc);
Daniel Borkmannf9e42b82013-06-14 18:24:04 +0200106 return;
107 }
108
109 primary = &peer->saddr;
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700110 }
111
Thomas Graf0b0fe912012-12-06 09:25:04 +0000112 rcu_read_lock();
113 list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
114 if (!laddr->valid)
115 continue;
116
Al Viro5f242a132006-11-20 17:05:23 -0800117 addr = &laddr->a;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 af = sctp_get_af_specific(addr->sa.sa_family);
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700119 if (primary && af->cmp_addr(addr, primary)) {
120 seq_printf(seq, "*");
121 }
Al Viro5f242a132006-11-20 17:05:23 -0800122 af->seq_dump_addr(seq, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 }
Thomas Graf0b0fe912012-12-06 09:25:04 +0000124 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125}
126
127/* Dump remote addresses of an association. */
128static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
129{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 struct sctp_transport *transport;
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700131 union sctp_addr *addr, *primary;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 struct sctp_af *af;
133
Al Viroacd2bc92006-11-20 17:06:04 -0800134 primary = &assoc->peer.primary_addr;
Thomas Graf45122ca262012-12-06 09:25:05 +0000135 list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
Robert P. J. Day9dbc15f02008-04-12 18:54:24 -0700136 transports) {
Al Viro5f242a132006-11-20 17:05:23 -0800137 addr = &transport->ipaddr;
Thomas Graf45122ca262012-12-06 09:25:05 +0000138
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 af = sctp_get_af_specific(addr->sa.sa_family);
Al Viroacd2bc92006-11-20 17:06:04 -0800140 if (af->cmp_addr(addr, primary)) {
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700141 seq_printf(seq, "*");
142 }
Al Viro5f242a132006-11-20 17:05:23 -0800143 af->seq_dump_addr(seq, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 }
145}
146
wangweidong26ac8e52013-12-23 12:16:51 +0800147static void *sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700148{
Vlad Yasevich49392e52006-01-17 11:53:06 -0800149 if (*pos >= sctp_ep_hashsize)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700150 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
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700158 return (void *)pos;
159}
160
161static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
162{
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700163}
164
165
wangweidong26ac8e52013-12-23 12:16:51 +0800166static void *sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700167{
Vlad Yasevich49392e52006-01-17 11:53:06 -0800168 if (++*pos >= sctp_ep_hashsize)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700169 return NULL;
170
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700171 return pos;
172}
173
174
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175/* Display sctp endpoints (/proc/net/sctp/eps). */
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;
Vlad Yasevich38b0e422006-01-17 11:54:06 -0800182 int hash = *(loff_t *)v;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
Vlad Yasevich49392e52006-01-17 11:53:06 -0800184 if (hash >= sctp_ep_hashsize)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700185 return -ENOMEM;
186
Vlad Yasevich49392e52006-01-17 11:53:06 -0800187 head = &sctp_ep_hashtable[hash];
Xin Longc0a4c2d2017-06-10 15:13:32 +0800188 read_lock_bh(&head->lock);
Sasha Levinb67bfe02013-02-27 17:06:00 -0800189 sctp_for_each_hentry(epb, &head->chain) {
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700190 ep = sctp_ep(epb);
191 sk = epb->sk;
Ulrich Weber6932f112012-08-16 01:24:49 +0000192 if (!net_eq(sock_net(sk), seq_file_net(seq)))
Eric W. Biederman13d782f2012-08-06 08:45:15 +0000193 continue;
Francesco Fuscod14c5ab2013-08-15 13:42:14 +0200194 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
Vlad Yasevich49392e52006-01-17 11:53:06 -0800195 sctp_sk(sk)->type, sk->sk_state, hash,
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700196 epb->bind_addr.port,
Eric W. Biedermana7cb5a42012-05-24 01:10:10 -0600197 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
198 sock_i_ino(sk));
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700199
200 sctp_seq_dump_local_addrs(seq, epb);
201 seq_printf(seq, "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 }
Xin Longc0a4c2d2017-06-10 15:13:32 +0800203 read_unlock_bh(&head->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
205 return 0;
206}
207
Philippe De Muyter56b3d972007-07-10 23:07:31 -0700208static const struct seq_operations sctp_eps_ops = {
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700209 .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
Xin Long39f66a72015-12-30 23:50:48 +0800215struct sctp_ht_iter {
216 struct seq_net_private p;
217 struct rhashtable_iter hti;
218};
219
Xin Longb5e2f4e2016-04-14 15:35:34 +0800220static void *sctp_transport_seq_start(struct seq_file *seq, loff_t *pos)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700221{
Xin Long626d16f2016-04-14 15:35:31 +0800222 struct sctp_ht_iter *iter = seq->private;
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700223
Tom Herbert97a6ec42017-12-04 10:31:41 -0800224 sctp_transport_walk_start(&iter->hti);
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700225
Xin Long626d16f2016-04-14 15:35:31 +0800226 return sctp_transport_get_idx(seq_file_net(seq), &iter->hti, *pos);
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700227}
228
Xin Longb5e2f4e2016-04-14 15:35:34 +0800229static void sctp_transport_seq_stop(struct seq_file *seq, void *v)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700230{
Xin Long626d16f2016-04-14 15:35:31 +0800231 struct sctp_ht_iter *iter = seq->private;
232
233 sctp_transport_walk_stop(&iter->hti);
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700234}
235
Xin Longb5e2f4e2016-04-14 15:35:34 +0800236static void *sctp_transport_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700237{
Xin Long626d16f2016-04-14 15:35:31 +0800238 struct sctp_ht_iter *iter = seq->private;
239
Xin Long39f66a72015-12-30 23:50:48 +0800240 ++*pos;
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700241
Xin Long626d16f2016-04-14 15:35:31 +0800242 return sctp_transport_get_next(seq_file_net(seq), &iter->hti);
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700243}
244
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245/* Display sctp associations (/proc/net/sctp/assocs). */
246static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
247{
Xin Long39f66a72015-12-30 23:50:48 +0800248 struct sctp_transport *transport;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 struct sctp_association *assoc;
Xin Long39f66a72015-12-30 23:50:48 +0800250 struct sctp_ep_common *epb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252
Xin Long39f66a72015-12-30 23:50:48 +0800253 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 }
Xin Long39f66a72015-12-30 23:50:48 +0800261
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",
Xin Longcee360a2017-05-31 16:36:31 +0800285 assoc->hbinterval, assoc->stream.incnt,
286 assoc->stream.outcnt, assoc->max_retrans,
Xin Long39f66a72015-12-30 23:50:48 +0800287 assoc->init_retries, assoc->shutdown_retries,
288 assoc->rtx_data_chunks,
Reshetova, Elena14afee42017-06-30 13:08:00 +0300289 refcount_read(&sk->sk_wmem_alloc),
Xin Long39f66a72015-12-30 23:50:48 +0800290 sk->sk_wmem_queued,
291 sk->sk_sndbuf,
292 sk->sk_rcvbuf);
293 seq_printf(seq, "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
Xin Longfba4c332016-01-22 01:49:08 +0800295 sctp_transport_put(transport);
296
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 return 0;
298}
299
Philippe De Muyter56b3d972007-07-10 23:07:31 -0700300static const struct seq_operations sctp_assoc_ops = {
Xin Longb5e2f4e2016-04-14 15:35:34 +0800301 .start = sctp_transport_seq_start,
302 .next = sctp_transport_seq_next,
303 .stop = sctp_transport_seq_stop,
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700304 .show = sctp_assocs_seq_show,
305};
306
Neil Horman20c2c1f2008-05-09 15:14:50 -0700307static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
308{
Neil Horman20c2c1f2008-05-09 15:14:50 -0700309 struct sctp_association *assoc;
Xin Long3d73e8f2016-02-28 10:33:11 +0800310 struct sctp_transport *transport, *tsp;
Neil Horman20c2c1f2008-05-09 15:14:50 -0700311
Xin Long39f66a72015-12-30 23:50:48 +0800312 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;
Neil Horman20c2c1f2008-05-09 15:14:50 -0700316 }
317
Xin Long3d73e8f2016-02-28 10:33:11 +0800318 transport = (struct sctp_transport *)v;
Xin Long3d73e8f2016-02-28 10:33:11 +0800319 assoc = transport->asoc;
Xin Long39f66a72015-12-30 23:50:48 +0800320
321 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
322 transports) {
Xin Long39f66a72015-12-30 23:50:48 +0800323 /*
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);
368
369 seq_printf(seq, "\n");
370 }
Neil Horman20c2c1f2008-05-09 15:14:50 -0700371
Xin Long3d73e8f2016-02-28 10:33:11 +0800372 sctp_transport_put(transport);
Xin Longfba4c332016-01-22 01:49:08 +0800373
Neil Horman20c2c1f2008-05-09 15:14:50 -0700374 return 0;
Neil Horman20c2c1f2008-05-09 15:14:50 -0700375}
376
377static const struct seq_operations sctp_remaddr_ops = {
Xin Longb5e2f4e2016-04-14 15:35:34 +0800378 .start = sctp_transport_seq_start,
379 .next = sctp_transport_seq_next,
380 .stop = sctp_transport_seq_stop,
Neil Horman20c2c1f2008-05-09 15:14:50 -0700381 .show = sctp_remaddr_seq_show,
382};
383
Al Virod47d08c2018-03-16 23:32:51 +0000384/* Set up the proc fs entry for the SCTP protocol. */
385int __net_init sctp_proc_init(struct net *net)
Neil Horman20c2c1f2008-05-09 15:14:50 -0700386{
Al Virod47d08c2018-03-16 23:32:51 +0000387 net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net);
388 if (!net->sctp.proc_net_sctp)
Neil Horman20c2c1f2008-05-09 15:14:50 -0700389 return -ENOMEM;
Christoph Hellwig3617d942018-04-13 20:38:35 +0200390 if (!proc_create_net_single("snmp", 0444, net->sctp.proc_net_sctp,
391 sctp_snmp_seq_show, NULL))
Al Virod47d08c2018-03-16 23:32:51 +0000392 goto cleanup;
Christoph Hellwigc3506372018-04-10 19:42:55 +0200393 if (!proc_create_net("eps", 0444, net->sctp.proc_net_sctp,
394 &sctp_eps_ops, sizeof(struct seq_net_private)))
Al Virod47d08c2018-03-16 23:32:51 +0000395 goto cleanup;
Christoph Hellwigc3506372018-04-10 19:42:55 +0200396 if (!proc_create_net("assocs", 0444, net->sctp.proc_net_sctp,
397 &sctp_assoc_ops, sizeof(struct sctp_ht_iter)))
Al Virod47d08c2018-03-16 23:32:51 +0000398 goto cleanup;
Christoph Hellwigc3506372018-04-10 19:42:55 +0200399 if (!proc_create_net("remaddr", 0444, net->sctp.proc_net_sctp,
400 &sctp_remaddr_ops, sizeof(struct sctp_ht_iter)))
Al Virod47d08c2018-03-16 23:32:51 +0000401 goto cleanup;
Neil Horman20c2c1f2008-05-09 15:14:50 -0700402 return 0;
Al Virod47d08c2018-03-16 23:32:51 +0000403
404cleanup:
405 remove_proc_subtree("sctp", net->proc_net);
406 net->sctp.proc_net_sctp = NULL;
407 return -ENOMEM;
Neil Horman20c2c1f2008-05-09 15:14:50 -0700408}