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
26 * Written or modified by:
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 struct net *net = seq->private;
79 for (i = 0; sctp_snmp_list[i].name != NULL; i++)
80 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
81 snmp_fold_field(net->sctp.sctp_statistics,
82 sctp_snmp_list[i].entry));
87 /* Initialize the seq file operations for 'snmp' object. */
88 static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
90 return single_open_net(inode, file, sctp_snmp_seq_show);
93 static const struct file_operations sctp_snmp_seq_fops = {
95 .open = sctp_snmp_seq_open,
98 .release = single_release_net,
101 /* Set up the proc fs entry for 'snmp' object. */
102 int __net_init sctp_snmp_proc_init(struct net *net)
104 struct proc_dir_entry *p;
106 p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp,
107 &sctp_snmp_seq_fops);
114 /* Cleanup the proc fs entry for 'snmp' object. */
115 void sctp_snmp_proc_exit(struct net *net)
117 remove_proc_entry("snmp", net->sctp.proc_net_sctp);
120 /* Dump local addresses of an association/endpoint. */
121 static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
123 struct sctp_association *asoc;
124 struct sctp_sockaddr_entry *laddr;
125 struct sctp_transport *peer;
126 union sctp_addr *addr, *primary = NULL;
129 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
130 asoc = sctp_assoc(epb);
132 peer = asoc->peer.primary_path;
133 if (unlikely(peer == NULL)) {
134 WARN(1, "Association %p with NULL primary path!\n", asoc);
138 primary = &peer->saddr;
142 list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
147 af = sctp_get_af_specific(addr->sa.sa_family);
148 if (primary && af->cmp_addr(addr, primary)) {
149 seq_printf(seq, "*");
151 af->seq_dump_addr(seq, addr);
156 /* Dump remote addresses of an association. */
157 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
159 struct sctp_transport *transport;
160 union sctp_addr *addr, *primary;
163 primary = &assoc->peer.primary_addr;
165 list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
167 addr = &transport->ipaddr;
171 af = sctp_get_af_specific(addr->sa.sa_family);
172 if (af->cmp_addr(addr, primary)) {
173 seq_printf(seq, "*");
175 af->seq_dump_addr(seq, addr);
180 static void *sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
182 if (*pos >= sctp_ep_hashsize)
189 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n");
194 static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
199 static void *sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
201 if (++*pos >= sctp_ep_hashsize)
208 /* Display sctp endpoints (/proc/net/sctp/eps). */
209 static int sctp_eps_seq_show(struct seq_file *seq, void *v)
211 struct sctp_hashbucket *head;
212 struct sctp_ep_common *epb;
213 struct sctp_endpoint *ep;
215 int hash = *(loff_t *)v;
217 if (hash >= sctp_ep_hashsize)
220 head = &sctp_ep_hashtable[hash];
222 read_lock(&head->lock);
223 sctp_for_each_hentry(epb, &head->chain) {
226 if (!net_eq(sock_net(sk), seq_file_net(seq)))
228 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
229 sctp_sk(sk)->type, sk->sk_state, hash,
231 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
234 sctp_seq_dump_local_addrs(seq, epb);
235 seq_printf(seq, "\n");
237 read_unlock(&head->lock);
243 static const struct seq_operations sctp_eps_ops = {
244 .start = sctp_eps_seq_start,
245 .next = sctp_eps_seq_next,
246 .stop = sctp_eps_seq_stop,
247 .show = sctp_eps_seq_show,
251 /* Initialize the seq file operations for 'eps' object. */
252 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
254 return seq_open_net(inode, file, &sctp_eps_ops,
255 sizeof(struct seq_net_private));
258 static const struct file_operations sctp_eps_seq_fops = {
259 .open = sctp_eps_seq_open,
262 .release = seq_release_net,
265 /* Set up the proc fs entry for 'eps' object. */
266 int __net_init sctp_eps_proc_init(struct net *net)
268 struct proc_dir_entry *p;
270 p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp,
278 /* Cleanup the proc fs entry for 'eps' object. */
279 void sctp_eps_proc_exit(struct net *net)
281 remove_proc_entry("eps", net->sctp.proc_net_sctp);
284 struct sctp_ht_iter {
285 struct seq_net_private p;
286 struct rhashtable_iter hti;
289 static struct sctp_transport *sctp_transport_get_next(struct seq_file *seq)
291 struct sctp_ht_iter *iter = seq->private;
292 struct sctp_transport *t;
294 t = rhashtable_walk_next(&iter->hti);
295 for (; t; t = rhashtable_walk_next(&iter->hti)) {
297 if (PTR_ERR(t) == -EAGAIN)
302 if (net_eq(sock_net(t->asoc->base.sk), seq_file_net(seq)) &&
303 t->asoc->peer.primary_path == t)
310 static struct sctp_transport *sctp_transport_get_idx(struct seq_file *seq,
315 while (pos && (obj = sctp_transport_get_next(seq)) && !IS_ERR(obj))
321 static int sctp_transport_walk_start(struct seq_file *seq)
323 struct sctp_ht_iter *iter = seq->private;
326 err = rhashtable_walk_init(&sctp_transport_hashtable, &iter->hti);
330 err = rhashtable_walk_start(&iter->hti);
332 return err == -EAGAIN ? 0 : err;
335 static void sctp_transport_walk_stop(struct seq_file *seq)
337 struct sctp_ht_iter *iter = seq->private;
339 rhashtable_walk_stop(&iter->hti);
340 rhashtable_walk_exit(&iter->hti);
343 static void *sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
345 int err = sctp_transport_walk_start(seq);
350 return *pos ? sctp_transport_get_idx(seq, *pos) : SEQ_START_TOKEN;
353 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
355 sctp_transport_walk_stop(seq);
358 static void *sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
362 return sctp_transport_get_next(seq);
365 /* Display sctp associations (/proc/net/sctp/assocs). */
366 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
368 struct sctp_transport *transport;
369 struct sctp_association *assoc;
370 struct sctp_ep_common *epb;
373 if (v == SEQ_START_TOKEN) {
374 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
375 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
376 "RPORT LADDRS <-> RADDRS "
377 "HBINT INS OUTS MAXRT T1X T2X RTXC "
378 "wmema wmemq sndbuf rcvbuf\n");
382 transport = (struct sctp_transport *)v;
383 assoc = transport->asoc;
388 "%8pK %8pK %-3d %-3d %-2d %-4d "
389 "%4d %8d %8d %7u %5lu %-5d %5d ",
390 assoc, sk, sctp_sk(sk)->type, sk->sk_state,
394 atomic_read(&assoc->rmem_alloc),
395 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
399 seq_printf(seq, " ");
400 sctp_seq_dump_local_addrs(seq, epb);
401 seq_printf(seq, "<-> ");
402 sctp_seq_dump_remote_addrs(seq, assoc);
403 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
405 assoc->hbinterval, assoc->c.sinit_max_instreams,
406 assoc->c.sinit_num_ostreams, assoc->max_retrans,
407 assoc->init_retries, assoc->shutdown_retries,
408 assoc->rtx_data_chunks,
409 atomic_read(&sk->sk_wmem_alloc),
413 seq_printf(seq, "\n");
418 static const struct seq_operations sctp_assoc_ops = {
419 .start = sctp_assocs_seq_start,
420 .next = sctp_assocs_seq_next,
421 .stop = sctp_assocs_seq_stop,
422 .show = sctp_assocs_seq_show,
425 /* Initialize the seq file operations for 'assocs' object. */
426 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
428 return seq_open_net(inode, file, &sctp_assoc_ops,
429 sizeof(struct sctp_ht_iter));
432 static const struct file_operations sctp_assocs_seq_fops = {
433 .open = sctp_assocs_seq_open,
436 .release = seq_release_net,
439 /* Set up the proc fs entry for 'assocs' object. */
440 int __net_init sctp_assocs_proc_init(struct net *net)
442 struct proc_dir_entry *p;
444 p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
445 &sctp_assocs_seq_fops);
452 /* Cleanup the proc fs entry for 'assocs' object. */
453 void sctp_assocs_proc_exit(struct net *net)
455 remove_proc_entry("assocs", net->sctp.proc_net_sctp);
458 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
460 int err = sctp_transport_walk_start(seq);
465 return *pos ? sctp_transport_get_idx(seq, *pos) : SEQ_START_TOKEN;
468 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos)
472 return sctp_transport_get_next(seq);
475 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
477 sctp_transport_walk_stop(seq);
480 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
482 struct sctp_association *assoc;
483 struct sctp_transport *tsp;
485 if (v == SEQ_START_TOKEN) {
486 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
487 "REM_ADDR_RTX START STATE\n");
491 tsp = (struct sctp_transport *)v;
494 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
499 * The remote address (ADDR)
501 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
502 seq_printf(seq, " ");
504 * The association ID (ASSOC_ID)
506 seq_printf(seq, "%d ", tsp->asoc->assoc_id);
509 * If the Heartbeat is active (HB_ACT)
510 * Note: 1 = Active, 0 = Inactive
512 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
515 * Retransmit time out (RTO)
517 seq_printf(seq, "%lu ", tsp->rto);
520 * Maximum path retransmit count (PATH_MAX_RTX)
522 seq_printf(seq, "%d ", tsp->pathmaxrxt);
525 * remote address retransmit count (REM_ADDR_RTX)
526 * Note: We don't have a way to tally this at the moment
527 * so lets just leave it as zero for the moment
532 * remote address start time (START). This is also not
533 * currently implemented, but we can record it with a
534 * jiffies marker in a subsequent patch
539 * The current state of this destination. I.e.
540 * SCTP_ACTIVE, SCTP_INACTIVE, ...
542 seq_printf(seq, "%d", tsp->state);
544 seq_printf(seq, "\n");
550 static const struct seq_operations sctp_remaddr_ops = {
551 .start = sctp_remaddr_seq_start,
552 .next = sctp_remaddr_seq_next,
553 .stop = sctp_remaddr_seq_stop,
554 .show = sctp_remaddr_seq_show,
557 /* Cleanup the proc fs entry for 'remaddr' object. */
558 void sctp_remaddr_proc_exit(struct net *net)
560 remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
563 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
565 return seq_open_net(inode, file, &sctp_remaddr_ops,
566 sizeof(struct sctp_ht_iter));
569 static const struct file_operations sctp_remaddr_seq_fops = {
570 .open = sctp_remaddr_seq_open,
573 .release = seq_release_net,
576 int __net_init sctp_remaddr_proc_init(struct net *net)
578 struct proc_dir_entry *p;
580 p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
581 &sctp_remaddr_seq_fops);