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, write to
20 * the Free Software Foundation, 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
23 * Please send any bug reports or fixes you make to the
27 * Or submit a bug report through the following website:
28 * http://www.sf.net/projects/lksctp
30 * Written or modified by:
33 * Any bugs reported given to us we will try to fix... any fixes shared will
34 * be incorporated into the next SCTP release.
37 #include <linux/types.h>
38 #include <linux/seq_file.h>
39 #include <linux/init.h>
40 #include <linux/export.h>
41 #include <net/sctp/sctp.h>
42 #include <net/ip.h> /* for snmp_fold_field */
44 static const struct snmp_mib sctp_snmp_list[] = {
45 SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB),
46 SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS),
47 SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS),
48 SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS),
49 SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS),
50 SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES),
51 SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS),
52 SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS),
53 SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS),
54 SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS),
55 SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS),
56 SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS),
57 SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS),
58 SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS),
59 SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS),
60 SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS),
61 SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS),
62 SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
63 SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
64 SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
65 SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
66 SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
67 SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
68 SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
69 SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
70 SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
71 SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
72 SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
73 SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
74 SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
75 SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
76 SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
80 /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
81 static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
83 struct net *net = seq->private;
86 for (i = 0; sctp_snmp_list[i].name != NULL; i++)
87 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
88 snmp_fold_field((void __percpu **)net->sctp.sctp_statistics,
89 sctp_snmp_list[i].entry));
94 /* Initialize the seq file operations for 'snmp' object. */
95 static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
97 return single_open_net(inode, file, sctp_snmp_seq_show);
100 static const struct file_operations sctp_snmp_seq_fops = {
101 .owner = THIS_MODULE,
102 .open = sctp_snmp_seq_open,
105 .release = single_release_net,
108 /* Set up the proc fs entry for 'snmp' object. */
109 int __net_init sctp_snmp_proc_init(struct net *net)
111 struct proc_dir_entry *p;
113 p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp,
114 &sctp_snmp_seq_fops);
121 /* Cleanup the proc fs entry for 'snmp' object. */
122 void sctp_snmp_proc_exit(struct net *net)
124 remove_proc_entry("snmp", net->sctp.proc_net_sctp);
127 /* Dump local addresses of an association/endpoint. */
128 static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
130 struct sctp_association *asoc;
131 struct sctp_sockaddr_entry *laddr;
132 struct sctp_transport *peer;
133 union sctp_addr *addr, *primary = NULL;
136 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
137 asoc = sctp_assoc(epb);
139 peer = asoc->peer.primary_path;
140 if (unlikely(peer == NULL)) {
141 WARN(1, "Association %p with NULL primary path!\n", asoc);
145 primary = &peer->saddr;
149 list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
154 af = sctp_get_af_specific(addr->sa.sa_family);
155 if (primary && af->cmp_addr(addr, primary)) {
156 seq_printf(seq, "*");
158 af->seq_dump_addr(seq, addr);
163 /* Dump remote addresses of an association. */
164 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
166 struct sctp_transport *transport;
167 union sctp_addr *addr, *primary;
170 primary = &assoc->peer.primary_addr;
172 list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
174 addr = &transport->ipaddr;
178 af = sctp_get_af_specific(addr->sa.sa_family);
179 if (af->cmp_addr(addr, primary)) {
180 seq_printf(seq, "*");
182 af->seq_dump_addr(seq, addr);
187 static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
189 if (*pos >= sctp_ep_hashsize)
196 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n");
201 static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
206 static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
208 if (++*pos >= sctp_ep_hashsize)
215 /* Display sctp endpoints (/proc/net/sctp/eps). */
216 static int sctp_eps_seq_show(struct seq_file *seq, void *v)
218 struct sctp_hashbucket *head;
219 struct sctp_ep_common *epb;
220 struct sctp_endpoint *ep;
222 int hash = *(loff_t *)v;
224 if (hash >= sctp_ep_hashsize)
227 head = &sctp_ep_hashtable[hash];
228 sctp_local_bh_disable();
229 read_lock(&head->lock);
230 sctp_for_each_hentry(epb, &head->chain) {
233 if (!net_eq(sock_net(sk), seq_file_net(seq)))
235 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk,
236 sctp_sk(sk)->type, sk->sk_state, hash,
238 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
241 sctp_seq_dump_local_addrs(seq, epb);
242 seq_printf(seq, "\n");
244 read_unlock(&head->lock);
245 sctp_local_bh_enable();
250 static const struct seq_operations sctp_eps_ops = {
251 .start = sctp_eps_seq_start,
252 .next = sctp_eps_seq_next,
253 .stop = sctp_eps_seq_stop,
254 .show = sctp_eps_seq_show,
258 /* Initialize the seq file operations for 'eps' object. */
259 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
261 return seq_open_net(inode, file, &sctp_eps_ops,
262 sizeof(struct seq_net_private));
265 static const struct file_operations sctp_eps_seq_fops = {
266 .open = sctp_eps_seq_open,
269 .release = seq_release_net,
272 /* Set up the proc fs entry for 'eps' object. */
273 int __net_init sctp_eps_proc_init(struct net *net)
275 struct proc_dir_entry *p;
277 p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp,
285 /* Cleanup the proc fs entry for 'eps' object. */
286 void sctp_eps_proc_exit(struct net *net)
288 remove_proc_entry("eps", net->sctp.proc_net_sctp);
292 static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
294 if (*pos >= sctp_assoc_hashsize)
301 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
302 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
303 "RPORT LADDRS <-> RADDRS "
304 "HBINT INS OUTS MAXRT T1X T2X RTXC "
305 "wmema wmemq sndbuf rcvbuf\n");
310 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
315 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
317 if (++*pos >= sctp_assoc_hashsize)
323 /* Display sctp associations (/proc/net/sctp/assocs). */
324 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
326 struct sctp_hashbucket *head;
327 struct sctp_ep_common *epb;
328 struct sctp_association *assoc;
330 int hash = *(loff_t *)v;
332 if (hash >= sctp_assoc_hashsize)
335 head = &sctp_assoc_hashtable[hash];
336 sctp_local_bh_disable();
337 read_lock(&head->lock);
338 sctp_for_each_hentry(epb, &head->chain) {
339 assoc = sctp_assoc(epb);
341 if (!net_eq(sock_net(sk), seq_file_net(seq)))
344 "%8pK %8pK %-3d %-3d %-2d %-4d "
345 "%4d %8d %8d %7d %5lu %-5d %5d ",
346 assoc, sk, sctp_sk(sk)->type, sk->sk_state,
350 atomic_read(&assoc->rmem_alloc),
351 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
355 seq_printf(seq, " ");
356 sctp_seq_dump_local_addrs(seq, epb);
357 seq_printf(seq, "<-> ");
358 sctp_seq_dump_remote_addrs(seq, assoc);
359 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
361 assoc->hbinterval, assoc->c.sinit_max_instreams,
362 assoc->c.sinit_num_ostreams, assoc->max_retrans,
363 assoc->init_retries, assoc->shutdown_retries,
364 assoc->rtx_data_chunks,
365 atomic_read(&sk->sk_wmem_alloc),
369 seq_printf(seq, "\n");
371 read_unlock(&head->lock);
372 sctp_local_bh_enable();
377 static const struct seq_operations sctp_assoc_ops = {
378 .start = sctp_assocs_seq_start,
379 .next = sctp_assocs_seq_next,
380 .stop = sctp_assocs_seq_stop,
381 .show = sctp_assocs_seq_show,
384 /* Initialize the seq file operations for 'assocs' object. */
385 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
387 return seq_open_net(inode, file, &sctp_assoc_ops,
388 sizeof(struct seq_net_private));
391 static const struct file_operations sctp_assocs_seq_fops = {
392 .open = sctp_assocs_seq_open,
395 .release = seq_release_net,
398 /* Set up the proc fs entry for 'assocs' object. */
399 int __net_init sctp_assocs_proc_init(struct net *net)
401 struct proc_dir_entry *p;
403 p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
404 &sctp_assocs_seq_fops);
411 /* Cleanup the proc fs entry for 'assocs' object. */
412 void sctp_assocs_proc_exit(struct net *net)
414 remove_proc_entry("assocs", net->sctp.proc_net_sctp);
417 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
419 if (*pos >= sctp_assoc_hashsize)
426 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
427 "REM_ADDR_RTX START\n");
432 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos)
434 if (++*pos >= sctp_assoc_hashsize)
440 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
444 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
446 struct sctp_hashbucket *head;
447 struct sctp_ep_common *epb;
448 struct sctp_association *assoc;
449 struct sctp_transport *tsp;
450 int hash = *(loff_t *)v;
452 if (hash >= sctp_assoc_hashsize)
455 head = &sctp_assoc_hashtable[hash];
456 sctp_local_bh_disable();
457 read_lock(&head->lock);
459 sctp_for_each_hentry(epb, &head->chain) {
460 if (!net_eq(sock_net(epb->sk), seq_file_net(seq)))
462 assoc = sctp_assoc(epb);
463 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
469 * The remote address (ADDR)
471 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
472 seq_printf(seq, " ");
475 * The association ID (ASSOC_ID)
477 seq_printf(seq, "%d ", tsp->asoc->assoc_id);
480 * If the Heartbeat is active (HB_ACT)
481 * Note: 1 = Active, 0 = Inactive
483 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
486 * Retransmit time out (RTO)
488 seq_printf(seq, "%lu ", tsp->rto);
491 * Maximum path retransmit count (PATH_MAX_RTX)
493 seq_printf(seq, "%d ", tsp->pathmaxrxt);
496 * remote address retransmit count (REM_ADDR_RTX)
497 * Note: We don't have a way to tally this at the moment
498 * so lets just leave it as zero for the moment
500 seq_printf(seq, "0 ");
503 * remote address start time (START). This is also not
504 * currently implemented, but we can record it with a
505 * jiffies marker in a subsequent patch
507 seq_printf(seq, "0");
509 seq_printf(seq, "\n");
514 read_unlock(&head->lock);
515 sctp_local_bh_enable();
521 static const struct seq_operations sctp_remaddr_ops = {
522 .start = sctp_remaddr_seq_start,
523 .next = sctp_remaddr_seq_next,
524 .stop = sctp_remaddr_seq_stop,
525 .show = sctp_remaddr_seq_show,
528 /* Cleanup the proc fs entry for 'remaddr' object. */
529 void sctp_remaddr_proc_exit(struct net *net)
531 remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
534 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
536 return seq_open_net(inode, file, &sctp_remaddr_ops,
537 sizeof(struct seq_net_private));
540 static const struct file_operations sctp_remaddr_seq_fops = {
541 .open = sctp_remaddr_seq_open,
544 .release = seq_release_net,
547 int __net_init sctp_remaddr_proc_init(struct net *net)
549 struct proc_dir_entry *p;
551 p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
552 &sctp_remaddr_seq_fops);