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Thomas Gleixner47505b82019-05-23 11:14:41 +02001// SPDX-License-Identifier: GPL-2.0-or-later
Vlad Yasevich60c778b2008-01-11 09:57:09 -05002/* SCTP kernel implementation
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 * Copyright (c) 2003 International Business Machines, Corp.
4 *
Vlad Yasevich60c778b2008-01-11 09:57:09 -05005 * This file is part of the SCTP kernel implementation
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * Please send any bug reports or fixes you make to the
8 * email address(es):
Daniel Borkmann91705c62013-07-23 14:51:47 +02009 * lksctp developers <linux-sctp@vger.kernel.org>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 * Written or modified by:
12 * Sridhar Samudrala <sri@us.ibm.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 */
14
15#include <linux/types.h>
16#include <linux/seq_file.h>
17#include <linux/init.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040018#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <net/sctp/sctp.h>
Pavel Emelyanov3f5340a2008-02-09 23:23:44 -080020#include <net/ip.h> /* for snmp_fold_field */
Linus Torvalds1da177e2005-04-16 15:20:36 -070021
Alexey Dobriyan58339292010-01-22 10:17:26 +000022static const struct snmp_mib sctp_snmp_list[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 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),
Sridhar Samudralaac0b0462006-08-22 00:15:33 -070040 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),
Vlad Yasevichd2287f82005-08-23 10:12:04 -070055 SNMP_MIB_SENTINEL
Linus Torvalds1da177e2005-04-16 15:20:36 -070056};
57
Linus Torvalds1da177e2005-04-16 15:20:36 -070058/* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
59static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
60{
Jia He7d64a942016-09-30 11:29:01 +080061 unsigned long buff[SCTP_MIB_MAX];
Eric W. Biederman13d782f2012-08-06 08:45:15 +000062 struct net *net = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 int i;
64
Jia He7d64a942016-09-30 11:29:01 +080065 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);
Jia He6d4a7412016-09-30 11:29:04 +080069 for (i = 0; sctp_snmp_list[i].name; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
Jia He7d64a942016-09-30 11:29:01 +080071 buff[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73 return 0;
74}
75
Linus Torvalds1da177e2005-04-16 15:20:36 -070076/* Dump local addresses of an association/endpoint. */
77static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
78{
Vladislav Yasevichbca735b2005-06-13 15:11:57 -070079 struct sctp_association *asoc;
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 struct sctp_sockaddr_entry *laddr;
Vladislav Yasevichbca735b2005-06-13 15:11:57 -070081 struct sctp_transport *peer;
82 union sctp_addr *addr, *primary = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 struct sctp_af *af;
84
Vladislav Yasevichbca735b2005-06-13 15:11:57 -070085 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
Daniel Borkmannf9e42b82013-06-14 18:24:04 +020086 asoc = sctp_assoc(epb);
87
88 peer = asoc->peer.primary_path;
89 if (unlikely(peer == NULL)) {
Daniel Borkmannb527fe62013-06-25 18:17:28 +020090 WARN(1, "Association %p with NULL primary path!\n", asoc);
Daniel Borkmannf9e42b82013-06-14 18:24:04 +020091 return;
92 }
93
94 primary = &peer->saddr;
Vladislav Yasevichbca735b2005-06-13 15:11:57 -070095 }
96
Thomas Graf0b0fe912012-12-06 09:25:04 +000097 rcu_read_lock();
98 list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
99 if (!laddr->valid)
100 continue;
101
Al Viro5f242a132006-11-20 17:05:23 -0800102 addr = &laddr->a;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 af = sctp_get_af_specific(addr->sa.sa_family);
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700104 if (primary && af->cmp_addr(addr, primary)) {
105 seq_printf(seq, "*");
106 }
Al Viro5f242a132006-11-20 17:05:23 -0800107 af->seq_dump_addr(seq, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 }
Thomas Graf0b0fe912012-12-06 09:25:04 +0000109 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110}
111
112/* Dump remote addresses of an association. */
113static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
114{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 struct sctp_transport *transport;
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700116 union sctp_addr *addr, *primary;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 struct sctp_af *af;
118
Al Viroacd2bc92006-11-20 17:06:04 -0800119 primary = &assoc->peer.primary_addr;
Thomas Graf45122ca262012-12-06 09:25:05 +0000120 list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
Robert P. J. Day9dbc15f02008-04-12 18:54:24 -0700121 transports) {
Al Viro5f242a132006-11-20 17:05:23 -0800122 addr = &transport->ipaddr;
Thomas Graf45122ca262012-12-06 09:25:05 +0000123
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 af = sctp_get_af_specific(addr->sa.sa_family);
Al Viroacd2bc92006-11-20 17:06:04 -0800125 if (af->cmp_addr(addr, primary)) {
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700126 seq_printf(seq, "*");
127 }
Al Viro5f242a132006-11-20 17:05:23 -0800128 af->seq_dump_addr(seq, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 }
130}
131
wangweidong26ac8e52013-12-23 12:16:51 +0800132static void *sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700133{
Vlad Yasevich49392e52006-01-17 11:53:06 -0800134 if (*pos >= sctp_ep_hashsize)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700135 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
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700143 return (void *)pos;
144}
145
146static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
147{
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700148}
149
150
wangweidong26ac8e52013-12-23 12:16:51 +0800151static void *sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700152{
Vlad Yasevich49392e52006-01-17 11:53:06 -0800153 if (++*pos >= sctp_ep_hashsize)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700154 return NULL;
155
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700156 return pos;
157}
158
159
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160/* Display sctp endpoints (/proc/net/sctp/eps). */
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;
Vlad Yasevich38b0e422006-01-17 11:54:06 -0800167 int hash = *(loff_t *)v;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
Vlad Yasevich49392e52006-01-17 11:53:06 -0800169 if (hash >= sctp_ep_hashsize)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700170 return -ENOMEM;
171
Vlad Yasevich49392e52006-01-17 11:53:06 -0800172 head = &sctp_ep_hashtable[hash];
Xin Longc0a4c2d2017-06-10 15:13:32 +0800173 read_lock_bh(&head->lock);
Sasha Levinb67bfe02013-02-27 17:06:00 -0800174 sctp_for_each_hentry(epb, &head->chain) {
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700175 ep = sctp_ep(epb);
176 sk = epb->sk;
Ulrich Weber6932f112012-08-16 01:24:49 +0000177 if (!net_eq(sock_net(sk), seq_file_net(seq)))
Eric W. Biederman13d782f2012-08-06 08:45:15 +0000178 continue;
Francesco Fuscod14c5ab2013-08-15 13:42:14 +0200179 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
Vlad Yasevich49392e52006-01-17 11:53:06 -0800180 sctp_sk(sk)->type, sk->sk_state, hash,
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700181 epb->bind_addr.port,
Eric W. Biedermana7cb5a42012-05-24 01:10:10 -0600182 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
183 sock_i_ino(sk));
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700184
185 sctp_seq_dump_local_addrs(seq, epb);
186 seq_printf(seq, "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 }
Xin Longc0a4c2d2017-06-10 15:13:32 +0800188 read_unlock_bh(&head->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
190 return 0;
191}
192
Philippe De Muyter56b3d972007-07-10 23:07:31 -0700193static const struct seq_operations sctp_eps_ops = {
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700194 .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
Xin Long39f66a72015-12-30 23:50:48 +0800200struct sctp_ht_iter {
201 struct seq_net_private p;
202 struct rhashtable_iter hti;
203};
204
Xin Longb5e2f4e2016-04-14 15:35:34 +0800205static void *sctp_transport_seq_start(struct seq_file *seq, loff_t *pos)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700206{
Xin Long626d16f2016-04-14 15:35:31 +0800207 struct sctp_ht_iter *iter = seq->private;
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700208
Tom Herbert97a6ec42017-12-04 10:31:41 -0800209 sctp_transport_walk_start(&iter->hti);
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700210
Xin Long626d16f2016-04-14 15:35:31 +0800211 return sctp_transport_get_idx(seq_file_net(seq), &iter->hti, *pos);
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700212}
213
Xin Longb5e2f4e2016-04-14 15:35:34 +0800214static void sctp_transport_seq_stop(struct seq_file *seq, void *v)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700215{
Xin Long626d16f2016-04-14 15:35:31 +0800216 struct sctp_ht_iter *iter = seq->private;
217
218 sctp_transport_walk_stop(&iter->hti);
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700219}
220
Xin Longb5e2f4e2016-04-14 15:35:34 +0800221static void *sctp_transport_seq_next(struct seq_file *seq, void *v, loff_t *pos)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700222{
Xin Long626d16f2016-04-14 15:35:31 +0800223 struct sctp_ht_iter *iter = seq->private;
224
Xin Long39f66a72015-12-30 23:50:48 +0800225 ++*pos;
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700226
Xin Long626d16f2016-04-14 15:35:31 +0800227 return sctp_transport_get_next(seq_file_net(seq), &iter->hti);
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700228}
229
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230/* Display sctp associations (/proc/net/sctp/assocs). */
231static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
232{
Xin Long39f66a72015-12-30 23:50:48 +0800233 struct sctp_transport *transport;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 struct sctp_association *assoc;
Xin Long39f66a72015-12-30 23:50:48 +0800235 struct sctp_ep_common *epb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237
Xin Long39f66a72015-12-30 23:50:48 +0800238 if (v == SEQ_START_TOKEN) {
239 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
240 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
241 "RPORT LADDRS <-> RADDRS "
242 "HBINT INS OUTS MAXRT T1X T2X RTXC "
243 "wmema wmemq sndbuf rcvbuf\n");
244 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 }
Xin Long39f66a72015-12-30 23:50:48 +0800246
247 transport = (struct sctp_transport *)v;
248 assoc = transport->asoc;
249 epb = &assoc->base;
250 sk = epb->sk;
251
252 seq_printf(seq,
253 "%8pK %8pK %-3d %-3d %-2d %-4d "
254 "%4d %8d %8d %7u %5lu %-5d %5d ",
255 assoc, sk, sctp_sk(sk)->type, sk->sk_state,
256 assoc->state, 0,
257 assoc->assoc_id,
258 assoc->sndbuf_used,
259 atomic_read(&assoc->rmem_alloc),
260 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
261 sock_i_ino(sk),
262 epb->bind_addr.port,
263 assoc->peer.port);
264 seq_printf(seq, " ");
265 sctp_seq_dump_local_addrs(seq, epb);
266 seq_printf(seq, "<-> ");
267 sctp_seq_dump_remote_addrs(seq, assoc);
268 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
269 "%8d %8d %8d %8d",
Xin Longcee360a2017-05-31 16:36:31 +0800270 assoc->hbinterval, assoc->stream.incnt,
271 assoc->stream.outcnt, assoc->max_retrans,
Xin Long39f66a72015-12-30 23:50:48 +0800272 assoc->init_retries, assoc->shutdown_retries,
273 assoc->rtx_data_chunks,
Reshetova, Elena14afee42017-06-30 13:08:00 +0300274 refcount_read(&sk->sk_wmem_alloc),
Xin Long39f66a72015-12-30 23:50:48 +0800275 sk->sk_wmem_queued,
276 sk->sk_sndbuf,
277 sk->sk_rcvbuf);
278 seq_printf(seq, "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
Xin Longfba4c332016-01-22 01:49:08 +0800280 sctp_transport_put(transport);
281
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 return 0;
283}
284
Philippe De Muyter56b3d972007-07-10 23:07:31 -0700285static const struct seq_operations sctp_assoc_ops = {
Xin Longb5e2f4e2016-04-14 15:35:34 +0800286 .start = sctp_transport_seq_start,
287 .next = sctp_transport_seq_next,
288 .stop = sctp_transport_seq_stop,
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700289 .show = sctp_assocs_seq_show,
290};
291
Neil Horman20c2c1f2008-05-09 15:14:50 -0700292static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
293{
Neil Horman20c2c1f2008-05-09 15:14:50 -0700294 struct sctp_association *assoc;
Xin Long3d73e8f2016-02-28 10:33:11 +0800295 struct sctp_transport *transport, *tsp;
Neil Horman20c2c1f2008-05-09 15:14:50 -0700296
Xin Long39f66a72015-12-30 23:50:48 +0800297 if (v == SEQ_START_TOKEN) {
298 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
299 "REM_ADDR_RTX START STATE\n");
300 return 0;
Neil Horman20c2c1f2008-05-09 15:14:50 -0700301 }
302
Xin Long3d73e8f2016-02-28 10:33:11 +0800303 transport = (struct sctp_transport *)v;
Xin Long3d73e8f2016-02-28 10:33:11 +0800304 assoc = transport->asoc;
Xin Long39f66a72015-12-30 23:50:48 +0800305
306 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
307 transports) {
Xin Long39f66a72015-12-30 23:50:48 +0800308 /*
309 * The remote address (ADDR)
310 */
311 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
312 seq_printf(seq, " ");
313 /*
314 * The association ID (ASSOC_ID)
315 */
316 seq_printf(seq, "%d ", tsp->asoc->assoc_id);
317
318 /*
319 * If the Heartbeat is active (HB_ACT)
320 * Note: 1 = Active, 0 = Inactive
321 */
322 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
323
324 /*
325 * Retransmit time out (RTO)
326 */
327 seq_printf(seq, "%lu ", tsp->rto);
328
329 /*
330 * Maximum path retransmit count (PATH_MAX_RTX)
331 */
332 seq_printf(seq, "%d ", tsp->pathmaxrxt);
333
334 /*
335 * remote address retransmit count (REM_ADDR_RTX)
336 * Note: We don't have a way to tally this at the moment
337 * so lets just leave it as zero for the moment
338 */
339 seq_puts(seq, "0 ");
340
341 /*
342 * remote address start time (START). This is also not
343 * currently implemented, but we can record it with a
344 * jiffies marker in a subsequent patch
345 */
346 seq_puts(seq, "0 ");
347
348 /*
349 * The current state of this destination. I.e.
350 * SCTP_ACTIVE, SCTP_INACTIVE, ...
351 */
352 seq_printf(seq, "%d", tsp->state);
353
354 seq_printf(seq, "\n");
355 }
Neil Horman20c2c1f2008-05-09 15:14:50 -0700356
Xin Long3d73e8f2016-02-28 10:33:11 +0800357 sctp_transport_put(transport);
Xin Longfba4c332016-01-22 01:49:08 +0800358
Neil Horman20c2c1f2008-05-09 15:14:50 -0700359 return 0;
Neil Horman20c2c1f2008-05-09 15:14:50 -0700360}
361
362static const struct seq_operations sctp_remaddr_ops = {
Xin Longb5e2f4e2016-04-14 15:35:34 +0800363 .start = sctp_transport_seq_start,
364 .next = sctp_transport_seq_next,
365 .stop = sctp_transport_seq_stop,
Neil Horman20c2c1f2008-05-09 15:14:50 -0700366 .show = sctp_remaddr_seq_show,
367};
368
Al Virod47d08c2018-03-16 23:32:51 +0000369/* Set up the proc fs entry for the SCTP protocol. */
370int __net_init sctp_proc_init(struct net *net)
Neil Horman20c2c1f2008-05-09 15:14:50 -0700371{
Al Virod47d08c2018-03-16 23:32:51 +0000372 net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net);
373 if (!net->sctp.proc_net_sctp)
Neil Horman20c2c1f2008-05-09 15:14:50 -0700374 return -ENOMEM;
Christoph Hellwig3617d942018-04-13 20:38:35 +0200375 if (!proc_create_net_single("snmp", 0444, net->sctp.proc_net_sctp,
376 sctp_snmp_seq_show, NULL))
Al Virod47d08c2018-03-16 23:32:51 +0000377 goto cleanup;
Christoph Hellwigc3506372018-04-10 19:42:55 +0200378 if (!proc_create_net("eps", 0444, net->sctp.proc_net_sctp,
379 &sctp_eps_ops, sizeof(struct seq_net_private)))
Al Virod47d08c2018-03-16 23:32:51 +0000380 goto cleanup;
Christoph Hellwigc3506372018-04-10 19:42:55 +0200381 if (!proc_create_net("assocs", 0444, net->sctp.proc_net_sctp,
382 &sctp_assoc_ops, sizeof(struct sctp_ht_iter)))
Al Virod47d08c2018-03-16 23:32:51 +0000383 goto cleanup;
Christoph Hellwigc3506372018-04-10 19:42:55 +0200384 if (!proc_create_net("remaddr", 0444, net->sctp.proc_net_sctp,
385 &sctp_remaddr_ops, sizeof(struct sctp_ht_iter)))
Al Virod47d08c2018-03-16 23:32:51 +0000386 goto cleanup;
Neil Horman20c2c1f2008-05-09 15:14:50 -0700387 return 0;
Al Virod47d08c2018-03-16 23:32:51 +0000388
389cleanup:
390 remove_proc_subtree("sctp", net->proc_net);
391 net->sctp.proc_net_sctp = NULL;
392 return -ENOMEM;
Neil Horman20c2c1f2008-05-09 15:14:50 -0700393}