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
25 * lksctp developers <lksctp-developers@lists.sourceforge.net>
27 * Or submit a bug report through the following website:
28 * http://www.sf.net/projects/lksctp
30 * Written or modified by:
31 * Sridhar Samudrala <sri@us.ibm.com>
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);
138 peer = asoc->peer.primary_path;
139 primary = &peer->saddr;
143 list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
148 af = sctp_get_af_specific(addr->sa.sa_family);
149 if (primary && af->cmp_addr(addr, primary)) {
150 seq_printf(seq, "*");
152 af->seq_dump_addr(seq, addr);
157 /* Dump remote addresses of an association. */
158 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
160 struct sctp_transport *transport;
161 union sctp_addr *addr, *primary;
164 primary = &assoc->peer.primary_addr;
166 list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
168 addr = &transport->ipaddr;
172 af = sctp_get_af_specific(addr->sa.sa_family);
173 if (af->cmp_addr(addr, primary)) {
174 seq_printf(seq, "*");
176 af->seq_dump_addr(seq, addr);
181 static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
183 if (*pos >= sctp_ep_hashsize)
190 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n");
195 static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
200 static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
202 if (++*pos >= sctp_ep_hashsize)
209 /* Display sctp endpoints (/proc/net/sctp/eps). */
210 static int sctp_eps_seq_show(struct seq_file *seq, void *v)
212 struct sctp_hashbucket *head;
213 struct sctp_ep_common *epb;
214 struct sctp_endpoint *ep;
216 int hash = *(loff_t *)v;
218 if (hash >= sctp_ep_hashsize)
221 head = &sctp_ep_hashtable[hash];
222 sctp_local_bh_disable();
223 read_lock(&head->lock);
224 sctp_for_each_hentry(epb, &head->chain) {
227 if (!net_eq(sock_net(sk), seq_file_net(seq)))
229 seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk,
230 sctp_sk(sk)->type, sk->sk_state, hash,
232 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
235 sctp_seq_dump_local_addrs(seq, epb);
236 seq_printf(seq, "\n");
238 read_unlock(&head->lock);
239 sctp_local_bh_enable();
244 static const struct seq_operations sctp_eps_ops = {
245 .start = sctp_eps_seq_start,
246 .next = sctp_eps_seq_next,
247 .stop = sctp_eps_seq_stop,
248 .show = sctp_eps_seq_show,
252 /* Initialize the seq file operations for 'eps' object. */
253 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
255 return seq_open_net(inode, file, &sctp_eps_ops,
256 sizeof(struct seq_net_private));
259 static const struct file_operations sctp_eps_seq_fops = {
260 .open = sctp_eps_seq_open,
263 .release = seq_release_net,
266 /* Set up the proc fs entry for 'eps' object. */
267 int __net_init sctp_eps_proc_init(struct net *net)
269 struct proc_dir_entry *p;
271 p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp,
279 /* Cleanup the proc fs entry for 'eps' object. */
280 void sctp_eps_proc_exit(struct net *net)
282 remove_proc_entry("eps", net->sctp.proc_net_sctp);
286 static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
288 if (*pos >= sctp_assoc_hashsize)
295 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
296 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
297 "RPORT LADDRS <-> RADDRS "
298 "HBINT INS OUTS MAXRT T1X T2X RTXC\n");
303 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
308 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
310 if (++*pos >= sctp_assoc_hashsize)
316 /* Display sctp associations (/proc/net/sctp/assocs). */
317 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
319 struct sctp_hashbucket *head;
320 struct sctp_ep_common *epb;
321 struct sctp_association *assoc;
323 int hash = *(loff_t *)v;
325 if (hash >= sctp_assoc_hashsize)
328 head = &sctp_assoc_hashtable[hash];
329 sctp_local_bh_disable();
330 read_lock(&head->lock);
331 sctp_for_each_hentry(epb, &head->chain) {
332 assoc = sctp_assoc(epb);
334 if (!net_eq(sock_net(sk), seq_file_net(seq)))
337 "%8pK %8pK %-3d %-3d %-2d %-4d "
338 "%4d %8d %8d %7d %5lu %-5d %5d ",
339 assoc, sk, sctp_sk(sk)->type, sk->sk_state,
343 atomic_read(&assoc->rmem_alloc),
344 from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
348 seq_printf(seq, " ");
349 sctp_seq_dump_local_addrs(seq, epb);
350 seq_printf(seq, "<-> ");
351 sctp_seq_dump_remote_addrs(seq, assoc);
352 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d ",
353 assoc->hbinterval, assoc->c.sinit_max_instreams,
354 assoc->c.sinit_num_ostreams, assoc->max_retrans,
355 assoc->init_retries, assoc->shutdown_retries,
356 assoc->rtx_data_chunks);
357 seq_printf(seq, "\n");
359 read_unlock(&head->lock);
360 sctp_local_bh_enable();
365 static const struct seq_operations sctp_assoc_ops = {
366 .start = sctp_assocs_seq_start,
367 .next = sctp_assocs_seq_next,
368 .stop = sctp_assocs_seq_stop,
369 .show = sctp_assocs_seq_show,
372 /* Initialize the seq file operations for 'assocs' object. */
373 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
375 return seq_open_net(inode, file, &sctp_assoc_ops,
376 sizeof(struct seq_net_private));
379 static const struct file_operations sctp_assocs_seq_fops = {
380 .open = sctp_assocs_seq_open,
383 .release = seq_release_net,
386 /* Set up the proc fs entry for 'assocs' object. */
387 int __net_init sctp_assocs_proc_init(struct net *net)
389 struct proc_dir_entry *p;
391 p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
392 &sctp_assocs_seq_fops);
399 /* Cleanup the proc fs entry for 'assocs' object. */
400 void sctp_assocs_proc_exit(struct net *net)
402 remove_proc_entry("assocs", net->sctp.proc_net_sctp);
405 static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
407 if (*pos >= sctp_assoc_hashsize)
414 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
415 "REM_ADDR_RTX START\n");
420 static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos)
422 if (++*pos >= sctp_assoc_hashsize)
428 static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
432 static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
434 struct sctp_hashbucket *head;
435 struct sctp_ep_common *epb;
436 struct sctp_association *assoc;
437 struct sctp_transport *tsp;
438 int hash = *(loff_t *)v;
440 if (hash >= sctp_assoc_hashsize)
443 head = &sctp_assoc_hashtable[hash];
444 sctp_local_bh_disable();
445 read_lock(&head->lock);
447 sctp_for_each_hentry(epb, &head->chain) {
448 if (!net_eq(sock_net(epb->sk), seq_file_net(seq)))
450 assoc = sctp_assoc(epb);
451 list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
457 * The remote address (ADDR)
459 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
460 seq_printf(seq, " ");
463 * The association ID (ASSOC_ID)
465 seq_printf(seq, "%d ", tsp->asoc->assoc_id);
468 * If the Heartbeat is active (HB_ACT)
469 * Note: 1 = Active, 0 = Inactive
471 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
474 * Retransmit time out (RTO)
476 seq_printf(seq, "%lu ", tsp->rto);
479 * Maximum path retransmit count (PATH_MAX_RTX)
481 seq_printf(seq, "%d ", tsp->pathmaxrxt);
484 * remote address retransmit count (REM_ADDR_RTX)
485 * Note: We don't have a way to tally this at the moment
486 * so lets just leave it as zero for the moment
488 seq_printf(seq, "0 ");
491 * remote address start time (START). This is also not
492 * currently implemented, but we can record it with a
493 * jiffies marker in a subsequent patch
495 seq_printf(seq, "0");
497 seq_printf(seq, "\n");
502 read_unlock(&head->lock);
503 sctp_local_bh_enable();
509 static const struct seq_operations sctp_remaddr_ops = {
510 .start = sctp_remaddr_seq_start,
511 .next = sctp_remaddr_seq_next,
512 .stop = sctp_remaddr_seq_stop,
513 .show = sctp_remaddr_seq_show,
516 /* Cleanup the proc fs entry for 'remaddr' object. */
517 void sctp_remaddr_proc_exit(struct net *net)
519 remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
522 static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
524 return seq_open_net(inode, file, &sctp_remaddr_ops,
525 sizeof(struct seq_net_private));
528 static const struct file_operations sctp_remaddr_seq_fops = {
529 .open = sctp_remaddr_seq_open,
532 .release = seq_release_net,
535 int __net_init sctp_remaddr_proc_init(struct net *net)
537 struct proc_dir_entry *p;
539 p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
540 &sctp_remaddr_seq_fops);