1 /* SCTP kernel implementation
2 * Copyright (c) 2003 International Business Machines, Corp.
4 * This file is part of the SCTP kernel implementation
6 * This SCTP implementation is free software;
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)
12 * This SCTP implementation is distributed in the hope that it
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.
18 * You should have received a copy of the GNU General Public License
19 * along with GNU CC; see the file COPYING. If not, see
20 * <http://www.gnu.org/licenses/>.
22 * Please send any bug reports or fixes you make to the
24 * lksctp developers <linux-sctp@vger.kernel.org>
26 * Written or modified by:
27 * Sridhar Samudrala <sri@us.ibm.com>
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> /* for snmp_fold_field */
37 static 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),
73 /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
74 static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
76 unsigned long buff[SCTP_MIB_MAX];
77 struct net *net = seq->private;
80 memset(buff, 0, sizeof(unsigned long) * SCTP_MIB_MAX);
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,
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)
94 struct sctp_association *asoc;
95 struct sctp_sockaddr_entry *laddr;
96 struct sctp_transport *peer;
97 union sctp_addr *addr, *primary = NULL;
100 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
101 asoc = sctp_assoc(epb);
103 peer = asoc->peer.primary_path;
104 if (unlikely(peer == NULL)) {
105 WARN(1, "Association %p with NULL primary path!\n", asoc);
109 primary = &peer->saddr;
113 list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
118 af = sctp_get_af_specific(addr->sa.sa_family);
119 if (primary && af->cmp_addr(addr, primary)) {
120 seq_printf(seq, "*");
122 af->seq_dump_addr(seq, addr);
127 /* Dump remote addresses of an association. */
128 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
130 struct sctp_transport *transport;
131 union sctp_addr *addr, *primary;
134 primary = &assoc->peer.primary_addr;
135 list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
137 addr = &transport->ipaddr;
139 af = sctp_get_af_specific(addr->sa.sa_family);
140 if (af->cmp_addr(addr, primary)) {
141 seq_printf(seq, "*");
143 af->seq_dump_addr(seq, addr);
147 static void *sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
149 if (*pos >= sctp_ep_hashsize)
156 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n");
161 static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
166 static void *sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
168 if (++*pos >= sctp_ep_hashsize)
175 /* Display sctp endpoints (/proc/net/sctp/eps). */
176 static int sctp_eps_seq_show(struct seq_file *seq, void *v)
178 struct sctp_hashbucket *head;
179 struct sctp_ep_common *epb;
180 struct sctp_endpoint *ep;
182 int hash = *(loff_t *)v;
184 if (hash >= sctp_ep_hashsize)
187 head = &sctp_ep_hashtable[hash];
188 read_lock_bh(&head->lock);
189 sctp_for_each_hentry(epb, &head->chain) {
192 if (!net_eq(sock_net(sk), seq_file_net(seq)))
194 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
195 sctp_sk(sk)->type, sk->sk_state, hash,
197 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
200 sctp_seq_dump_local_addrs(seq, epb);
201 seq_printf(seq, "\n");
203 read_unlock_bh(&head->lock);
208 static 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,
215 struct sctp_ht_iter {
216 struct seq_net_private p;
217 struct rhashtable_iter hti;
220 static void *sctp_transport_seq_start(struct seq_file *seq, loff_t *pos)
222 struct sctp_ht_iter *iter = seq->private;
224 sctp_transport_walk_start(&iter->hti);
226 return sctp_transport_get_idx(seq_file_net(seq), &iter->hti, *pos);
229 static void sctp_transport_seq_stop(struct seq_file *seq, void *v)
231 struct sctp_ht_iter *iter = seq->private;
233 if (v && v != SEQ_START_TOKEN) {
234 struct sctp_transport *transport = v;
236 sctp_transport_put(transport);
239 sctp_transport_walk_stop(&iter->hti);
242 static void *sctp_transport_seq_next(struct seq_file *seq, void *v, loff_t *pos)
244 struct sctp_ht_iter *iter = seq->private;
246 if (v && v != SEQ_START_TOKEN) {
247 struct sctp_transport *transport = v;
249 sctp_transport_put(transport);
254 return sctp_transport_get_next(seq_file_net(seq), &iter->hti);
257 /* Display sctp associations (/proc/net/sctp/assocs). */
258 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
260 struct sctp_transport *transport;
261 struct sctp_association *assoc;
262 struct sctp_ep_common *epb;
265 if (v == SEQ_START_TOKEN) {
266 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
267 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
268 "RPORT LADDRS <-> RADDRS "
269 "HBINT INS OUTS MAXRT T1X T2X RTXC "
270 "wmema wmemq sndbuf rcvbuf\n");
274 transport = (struct sctp_transport *)v;
275 assoc = transport->asoc;
280 "%8pK %8pK %-3d %-3d %-2d %-4d "
281 "%4d %8d %8d %7u %5lu %-5d %5d ",
282 assoc, sk, sctp_sk(sk)->type, sk->sk_state,
286 atomic_read(&assoc->rmem_alloc),
287 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
291 seq_printf(seq, " ");
292 sctp_seq_dump_local_addrs(seq, epb);
293 seq_printf(seq, "<-> ");
294 sctp_seq_dump_remote_addrs(seq, assoc);
295 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
297 assoc->hbinterval, assoc->stream.incnt,
298 assoc->stream.outcnt, assoc->max_retrans,
299 assoc->init_retries, assoc->shutdown_retries,
300 assoc->rtx_data_chunks,
301 refcount_read(&sk->sk_wmem_alloc),
305 seq_printf(seq, "\n");
310 static const struct seq_operations sctp_assoc_ops = {
311 .start = sctp_transport_seq_start,
312 .next = sctp_transport_seq_next,
313 .stop = sctp_transport_seq_stop,
314 .show = sctp_assocs_seq_show,
317 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
319 struct sctp_association *assoc;
320 struct sctp_transport *transport, *tsp;
322 if (v == SEQ_START_TOKEN) {
323 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
324 "REM_ADDR_RTX START STATE\n");
328 transport = (struct sctp_transport *)v;
329 assoc = transport->asoc;
331 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
334 * The remote address (ADDR)
336 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
337 seq_printf(seq, " ");
339 * The association ID (ASSOC_ID)
341 seq_printf(seq, "%d ", tsp->asoc->assoc_id);
344 * If the Heartbeat is active (HB_ACT)
345 * Note: 1 = Active, 0 = Inactive
347 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
350 * Retransmit time out (RTO)
352 seq_printf(seq, "%lu ", tsp->rto);
355 * Maximum path retransmit count (PATH_MAX_RTX)
357 seq_printf(seq, "%d ", tsp->pathmaxrxt);
360 * remote address retransmit count (REM_ADDR_RTX)
361 * Note: We don't have a way to tally this at the moment
362 * so lets just leave it as zero for the moment
367 * remote address start time (START). This is also not
368 * currently implemented, but we can record it with a
369 * jiffies marker in a subsequent patch
374 * The current state of this destination. I.e.
375 * SCTP_ACTIVE, SCTP_INACTIVE, ...
377 seq_printf(seq, "%d", tsp->state);
379 seq_printf(seq, "\n");
385 static const struct seq_operations sctp_remaddr_ops = {
386 .start = sctp_transport_seq_start,
387 .next = sctp_transport_seq_next,
388 .stop = sctp_transport_seq_stop,
389 .show = sctp_remaddr_seq_show,
392 /* Set up the proc fs entry for the SCTP protocol. */
393 int __net_init sctp_proc_init(struct net *net)
395 net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net);
396 if (!net->sctp.proc_net_sctp)
398 if (!proc_create_net_single("snmp", 0444, net->sctp.proc_net_sctp,
399 sctp_snmp_seq_show, NULL))
401 if (!proc_create_net("eps", 0444, net->sctp.proc_net_sctp,
402 &sctp_eps_ops, sizeof(struct seq_net_private)))
404 if (!proc_create_net("assocs", 0444, net->sctp.proc_net_sctp,
405 &sctp_assoc_ops, sizeof(struct sctp_ht_iter)))
407 if (!proc_create_net("remaddr", 0444, net->sctp.proc_net_sctp,
408 &sctp_remaddr_ops, sizeof(struct sctp_ht_iter)))
413 remove_proc_subtree("sctp", net->proc_net);
414 net->sctp.proc_net_sctp = NULL;