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 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;
169 af = sctp_get_af_specific(addr->sa.sa_family);
170 if (af->cmp_addr(addr, primary)) {
171 seq_printf(seq, "*");
173 af->seq_dump_addr(seq, addr);
178 static void *sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
180 if (*pos >= sctp_ep_hashsize)
187 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n");
192 static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
197 static void *sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
199 if (++*pos >= sctp_ep_hashsize)
206 /* Display sctp endpoints (/proc/net/sctp/eps). */
207 static int sctp_eps_seq_show(struct seq_file *seq, void *v)
209 struct sctp_hashbucket *head;
210 struct sctp_ep_common *epb;
211 struct sctp_endpoint *ep;
213 int hash = *(loff_t *)v;
215 if (hash >= sctp_ep_hashsize)
218 head = &sctp_ep_hashtable[hash];
220 read_lock(&head->lock);
221 sctp_for_each_hentry(epb, &head->chain) {
224 if (!net_eq(sock_net(sk), seq_file_net(seq)))
226 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
227 sctp_sk(sk)->type, sk->sk_state, hash,
229 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
232 sctp_seq_dump_local_addrs(seq, epb);
233 seq_printf(seq, "\n");
235 read_unlock(&head->lock);
241 static const struct seq_operations sctp_eps_ops = {
242 .start = sctp_eps_seq_start,
243 .next = sctp_eps_seq_next,
244 .stop = sctp_eps_seq_stop,
245 .show = sctp_eps_seq_show,
249 /* Initialize the seq file operations for 'eps' object. */
250 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
252 return seq_open_net(inode, file, &sctp_eps_ops,
253 sizeof(struct seq_net_private));
256 static const struct file_operations sctp_eps_seq_fops = {
257 .open = sctp_eps_seq_open,
260 .release = seq_release_net,
263 /* Set up the proc fs entry for 'eps' object. */
264 int __net_init sctp_eps_proc_init(struct net *net)
266 struct proc_dir_entry *p;
268 p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp,
276 /* Cleanup the proc fs entry for 'eps' object. */
277 void sctp_eps_proc_exit(struct net *net)
279 remove_proc_entry("eps", net->sctp.proc_net_sctp);
282 struct sctp_ht_iter {
283 struct seq_net_private p;
284 struct rhashtable_iter hti;
287 static struct sctp_transport *sctp_transport_get_next(struct seq_file *seq)
289 struct sctp_ht_iter *iter = seq->private;
290 struct sctp_transport *t;
292 t = rhashtable_walk_next(&iter->hti);
293 for (; t; t = rhashtable_walk_next(&iter->hti)) {
295 if (PTR_ERR(t) == -EAGAIN)
300 if (net_eq(sock_net(t->asoc->base.sk), seq_file_net(seq)) &&
301 t->asoc->peer.primary_path == t)
308 static struct sctp_transport *sctp_transport_get_idx(struct seq_file *seq,
311 void *obj = SEQ_START_TOKEN;
313 while (pos && (obj = sctp_transport_get_next(seq)) && !IS_ERR(obj))
319 static int sctp_transport_walk_start(struct seq_file *seq)
321 struct sctp_ht_iter *iter = seq->private;
324 err = rhashtable_walk_init(&sctp_transport_hashtable, &iter->hti);
328 err = rhashtable_walk_start(&iter->hti);
330 return err == -EAGAIN ? 0 : err;
333 static void sctp_transport_walk_stop(struct seq_file *seq)
335 struct sctp_ht_iter *iter = seq->private;
337 rhashtable_walk_stop(&iter->hti);
338 rhashtable_walk_exit(&iter->hti);
341 static void *sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
343 int err = sctp_transport_walk_start(seq);
348 return sctp_transport_get_idx(seq, *pos);
351 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
353 sctp_transport_walk_stop(seq);
356 static void *sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
360 return sctp_transport_get_next(seq);
363 /* Display sctp associations (/proc/net/sctp/assocs). */
364 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
366 struct sctp_transport *transport;
367 struct sctp_association *assoc;
368 struct sctp_ep_common *epb;
371 if (v == SEQ_START_TOKEN) {
372 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
373 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
374 "RPORT LADDRS <-> RADDRS "
375 "HBINT INS OUTS MAXRT T1X T2X RTXC "
376 "wmema wmemq sndbuf rcvbuf\n");
380 transport = (struct sctp_transport *)v;
381 if (!sctp_transport_hold(transport))
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");
415 sctp_transport_put(transport);
420 static const struct seq_operations sctp_assoc_ops = {
421 .start = sctp_assocs_seq_start,
422 .next = sctp_assocs_seq_next,
423 .stop = sctp_assocs_seq_stop,
424 .show = sctp_assocs_seq_show,
427 /* Initialize the seq file operations for 'assocs' object. */
428 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
430 return seq_open_net(inode, file, &sctp_assoc_ops,
431 sizeof(struct sctp_ht_iter));
434 static const struct file_operations sctp_assocs_seq_fops = {
435 .open = sctp_assocs_seq_open,
438 .release = seq_release_net,
441 /* Set up the proc fs entry for 'assocs' object. */
442 int __net_init sctp_assocs_proc_init(struct net *net)
444 struct proc_dir_entry *p;
446 p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
447 &sctp_assocs_seq_fops);
454 /* Cleanup the proc fs entry for 'assocs' object. */
455 void sctp_assocs_proc_exit(struct net *net)
457 remove_proc_entry("assocs", net->sctp.proc_net_sctp);
460 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
462 int err = sctp_transport_walk_start(seq);
467 return sctp_transport_get_idx(seq, *pos);
470 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos)
474 return sctp_transport_get_next(seq);
477 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
479 sctp_transport_walk_stop(seq);
482 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
484 struct sctp_association *assoc;
485 struct sctp_transport *tsp;
487 if (v == SEQ_START_TOKEN) {
488 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
489 "REM_ADDR_RTX START STATE\n");
493 tsp = (struct sctp_transport *)v;
494 if (!sctp_transport_hold(tsp))
498 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
501 * The remote address (ADDR)
503 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
504 seq_printf(seq, " ");
506 * The association ID (ASSOC_ID)
508 seq_printf(seq, "%d ", tsp->asoc->assoc_id);
511 * If the Heartbeat is active (HB_ACT)
512 * Note: 1 = Active, 0 = Inactive
514 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
517 * Retransmit time out (RTO)
519 seq_printf(seq, "%lu ", tsp->rto);
522 * Maximum path retransmit count (PATH_MAX_RTX)
524 seq_printf(seq, "%d ", tsp->pathmaxrxt);
527 * remote address retransmit count (REM_ADDR_RTX)
528 * Note: We don't have a way to tally this at the moment
529 * so lets just leave it as zero for the moment
534 * remote address start time (START). This is also not
535 * currently implemented, but we can record it with a
536 * jiffies marker in a subsequent patch
541 * The current state of this destination. I.e.
542 * SCTP_ACTIVE, SCTP_INACTIVE, ...
544 seq_printf(seq, "%d", tsp->state);
546 seq_printf(seq, "\n");
549 sctp_transport_put(tsp);
554 static const struct seq_operations sctp_remaddr_ops = {
555 .start = sctp_remaddr_seq_start,
556 .next = sctp_remaddr_seq_next,
557 .stop = sctp_remaddr_seq_stop,
558 .show = sctp_remaddr_seq_show,
561 /* Cleanup the proc fs entry for 'remaddr' object. */
562 void sctp_remaddr_proc_exit(struct net *net)
564 remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
567 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
569 return seq_open_net(inode, file, &sctp_remaddr_ops,
570 sizeof(struct sctp_ht_iter));
573 static const struct file_operations sctp_remaddr_seq_fops = {
574 .open = sctp_remaddr_seq_open,
577 .release = seq_release_net,
580 int __net_init sctp_remaddr_proc_init(struct net *net)
582 struct proc_dir_entry *p;
584 p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
585 &sctp_remaddr_seq_fops);