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Vlad Yasevich60c778b2008-01-11 09:57:09 -05001/* SCTP kernel implementation
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Copyright (c) 2003 International Business Machines, Corp.
3 *
Vlad Yasevich60c778b2008-01-11 09:57:09 -05004 * This file is part of the SCTP kernel implementation
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 *
Vlad Yasevich60c778b2008-01-11 09:57:09 -05006 * This SCTP implementation is free software;
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * 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)
10 * any later version.
11 *
Vlad Yasevich60c778b2008-01-11 09:57:09 -050012 * This SCTP implementation is distributed in the hope that it
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 * 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.
17 *
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.
22 *
23 * Please send any bug reports or fixes you make to the
24 * email address(es):
25 * lksctp developers <lksctp-developers@lists.sourceforge.net>
26 *
27 * Or submit a bug report through the following website:
28 * http://www.sf.net/projects/lksctp
29 *
30 * Written or modified by:
31 * Sridhar Samudrala <sri@us.ibm.com>
32 *
33 * Any bugs reported given to us we will try to fix... any fixes shared will
34 * be incorporated into the next SCTP release.
35 */
36
37#include <linux/types.h>
38#include <linux/seq_file.h>
39#include <linux/init.h>
40#include <net/sctp/sctp.h>
Pavel Emelyanov3f5340a2008-02-09 23:23:44 -080041#include <net/ip.h> /* for snmp_fold_field */
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
Alexey Dobriyan58339292010-01-22 10:17:26 +000043static const struct snmp_mib sctp_snmp_list[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB),
45 SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS),
46 SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS),
47 SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS),
48 SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS),
49 SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES),
50 SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS),
51 SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS),
52 SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS),
53 SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS),
54 SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS),
55 SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS),
56 SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS),
57 SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS),
58 SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS),
59 SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS),
60 SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS),
Sridhar Samudralaac0b0462006-08-22 00:15:33 -070061 SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
62 SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
63 SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
64 SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
65 SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
66 SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
67 SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
68 SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
69 SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
70 SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
71 SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
72 SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
73 SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
74 SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
75 SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
Vlad Yasevichd2287f82005-08-23 10:12:04 -070076 SNMP_MIB_SENTINEL
Linus Torvalds1da177e2005-04-16 15:20:36 -070077};
78
Linus Torvalds1da177e2005-04-16 15:20:36 -070079/* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
80static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
81{
82 int i;
83
84 for (i = 0; sctp_snmp_list[i].name != NULL; i++)
85 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
Tejun Heo7d720c32010-02-16 15:20:26 +000086 snmp_fold_field((void __percpu **)sctp_statistics,
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 sctp_snmp_list[i].entry));
88
89 return 0;
90}
91
92/* Initialize the seq file operations for 'snmp' object. */
93static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
94{
95 return single_open(file, sctp_snmp_seq_show, NULL);
96}
97
Arjan van de Venda7071d2007-02-12 00:55:36 -080098static const struct file_operations sctp_snmp_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 .owner = THIS_MODULE,
100 .open = sctp_snmp_seq_open,
101 .read = seq_read,
102 .llseek = seq_lseek,
103 .release = single_release,
104};
105
106/* Set up the proc fs entry for 'snmp' object. */
107int __init sctp_snmp_proc_init(void)
108{
109 struct proc_dir_entry *p;
110
Wang Chen160f17e2008-02-28 14:13:16 -0800111 p = proc_create("snmp", S_IRUGO, proc_net_sctp, &sctp_snmp_seq_fops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 if (!p)
113 return -ENOMEM;
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 return 0;
116}
117
118/* Cleanup the proc fs entry for 'snmp' object. */
119void sctp_snmp_proc_exit(void)
120{
121 remove_proc_entry("snmp", proc_net_sctp);
122}
123
124/* Dump local addresses of an association/endpoint. */
125static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
126{
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700127 struct sctp_association *asoc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 struct sctp_sockaddr_entry *laddr;
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700129 struct sctp_transport *peer;
130 union sctp_addr *addr, *primary = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 struct sctp_af *af;
132
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700133 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
134 asoc = sctp_assoc(epb);
135 peer = asoc->peer.primary_path;
Al Viro5f242a12006-11-20 17:05:23 -0800136 primary = &peer->saddr;
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700137 }
138
Robert P. J. Day9dbc15f2008-04-12 18:54:24 -0700139 list_for_each_entry(laddr, &epb->bind_addr.address_list, list) {
Al Viro5f242a12006-11-20 17:05:23 -0800140 addr = &laddr->a;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 af = sctp_get_af_specific(addr->sa.sa_family);
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700142 if (primary && af->cmp_addr(addr, primary)) {
143 seq_printf(seq, "*");
144 }
Al Viro5f242a12006-11-20 17:05:23 -0800145 af->seq_dump_addr(seq, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 }
147}
148
149/* Dump remote addresses of an association. */
150static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
151{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 struct sctp_transport *transport;
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700153 union sctp_addr *addr, *primary;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 struct sctp_af *af;
155
Al Viroacd2bc92006-11-20 17:06:04 -0800156 primary = &assoc->peer.primary_addr;
Robert P. J. Day9dbc15f2008-04-12 18:54:24 -0700157 list_for_each_entry(transport, &assoc->peer.transport_addr_list,
158 transports) {
Al Viro5f242a12006-11-20 17:05:23 -0800159 addr = &transport->ipaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 af = sctp_get_af_specific(addr->sa.sa_family);
Al Viroacd2bc92006-11-20 17:06:04 -0800161 if (af->cmp_addr(addr, primary)) {
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700162 seq_printf(seq, "*");
163 }
Al Viro5f242a12006-11-20 17:05:23 -0800164 af->seq_dump_addr(seq, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 }
166}
167
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700168static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
169{
Vlad Yasevich49392e52006-01-17 11:53:06 -0800170 if (*pos >= sctp_ep_hashsize)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700171 return NULL;
172
173 if (*pos < 0)
174 *pos = 0;
175
176 if (*pos == 0)
177 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n");
178
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700179 return (void *)pos;
180}
181
182static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
183{
184 return;
185}
186
187
188static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
189{
Vlad Yasevich49392e52006-01-17 11:53:06 -0800190 if (++*pos >= sctp_ep_hashsize)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700191 return NULL;
192
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700193 return pos;
194}
195
196
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197/* Display sctp endpoints (/proc/net/sctp/eps). */
198static int sctp_eps_seq_show(struct seq_file *seq, void *v)
199{
200 struct sctp_hashbucket *head;
201 struct sctp_ep_common *epb;
202 struct sctp_endpoint *ep;
203 struct sock *sk;
Vlad Yasevichd970dbf2007-11-09 11:43:40 -0500204 struct hlist_node *node;
Vlad Yasevich38b0e422006-01-17 11:54:06 -0800205 int hash = *(loff_t *)v;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
Vlad Yasevich49392e52006-01-17 11:53:06 -0800207 if (hash >= sctp_ep_hashsize)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700208 return -ENOMEM;
209
Vlad Yasevich49392e52006-01-17 11:53:06 -0800210 head = &sctp_ep_hashtable[hash];
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700211 sctp_local_bh_disable();
212 read_lock(&head->lock);
Vlad Yasevichd970dbf2007-11-09 11:43:40 -0500213 sctp_for_each_hentry(epb, node, &head->chain) {
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700214 ep = sctp_ep(epb);
215 sk = epb->sk;
216 seq_printf(seq, "%8p %8p %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk,
Vlad Yasevich49392e52006-01-17 11:53:06 -0800217 sctp_sk(sk)->type, sk->sk_state, hash,
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700218 epb->bind_addr.port,
219 sock_i_uid(sk), sock_i_ino(sk));
220
221 sctp_seq_dump_local_addrs(seq, epb);
222 seq_printf(seq, "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 }
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700224 read_unlock(&head->lock);
225 sctp_local_bh_enable();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
227 return 0;
228}
229
Philippe De Muyter56b3d972007-07-10 23:07:31 -0700230static const struct seq_operations sctp_eps_ops = {
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700231 .start = sctp_eps_seq_start,
232 .next = sctp_eps_seq_next,
233 .stop = sctp_eps_seq_stop,
234 .show = sctp_eps_seq_show,
235};
236
237
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238/* Initialize the seq file operations for 'eps' object. */
239static int sctp_eps_seq_open(struct inode *inode, struct file *file)
240{
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700241 return seq_open(file, &sctp_eps_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242}
243
Arjan van de Venda7071d2007-02-12 00:55:36 -0800244static const struct file_operations sctp_eps_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 .open = sctp_eps_seq_open,
246 .read = seq_read,
247 .llseek = seq_lseek,
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700248 .release = seq_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249};
250
251/* Set up the proc fs entry for 'eps' object. */
252int __init sctp_eps_proc_init(void)
253{
254 struct proc_dir_entry *p;
255
Pavel Emelyanov459eea72008-02-29 11:24:45 -0800256 p = proc_create("eps", S_IRUGO, proc_net_sctp, &sctp_eps_seq_fops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 if (!p)
258 return -ENOMEM;
259
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 return 0;
261}
262
263/* Cleanup the proc fs entry for 'eps' object. */
264void sctp_eps_proc_exit(void)
265{
266 remove_proc_entry("eps", proc_net_sctp);
267}
268
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700269
270static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
271{
Vlad Yasevich49392e52006-01-17 11:53:06 -0800272 if (*pos >= sctp_assoc_hashsize)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700273 return NULL;
274
275 if (*pos < 0)
276 *pos = 0;
277
278 if (*pos == 0)
Neil Horman58fbbed2008-02-29 11:40:56 -0800279 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
280 "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
281 "RPORT LADDRS <-> RADDRS "
282 "HBINT INS OUTS MAXRT T1X T2X RTXC\n");
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700283
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700284 return (void *)pos;
285}
286
287static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
288{
289 return;
290}
291
292
293static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
294{
Vlad Yasevich49392e52006-01-17 11:53:06 -0800295 if (++*pos >= sctp_assoc_hashsize)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700296 return NULL;
297
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700298 return pos;
299}
300
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301/* Display sctp associations (/proc/net/sctp/assocs). */
302static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
303{
304 struct sctp_hashbucket *head;
305 struct sctp_ep_common *epb;
306 struct sctp_association *assoc;
307 struct sock *sk;
Vlad Yasevichd970dbf2007-11-09 11:43:40 -0500308 struct hlist_node *node;
Vlad Yasevich38b0e422006-01-17 11:54:06 -0800309 int hash = *(loff_t *)v;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310
Vlad Yasevich49392e52006-01-17 11:53:06 -0800311 if (hash >= sctp_assoc_hashsize)
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700312 return -ENOMEM;
313
Vlad Yasevich49392e52006-01-17 11:53:06 -0800314 head = &sctp_assoc_hashtable[hash];
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700315 sctp_local_bh_disable();
316 read_lock(&head->lock);
Vlad Yasevichd970dbf2007-11-09 11:43:40 -0500317 sctp_for_each_hentry(epb, node, &head->chain) {
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700318 assoc = sctp_assoc(epb);
319 sk = epb->sk;
320 seq_printf(seq,
Neil Horman58fbbed2008-02-29 11:40:56 -0800321 "%8p %8p %-3d %-3d %-2d %-4d "
Neil Horman30e93562008-04-12 18:53:48 -0700322 "%4d %8d %8d %7d %5lu %-5d %5d ",
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700323 assoc, sk, sctp_sk(sk)->type, sk->sk_state,
Neil Horman58fbbed2008-02-29 11:40:56 -0800324 assoc->state, hash,
325 assoc->assoc_id,
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700326 assoc->sndbuf_used,
Vlad Yasevich6aa25512006-10-09 21:34:26 -0700327 atomic_read(&assoc->rmem_alloc),
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700328 sock_i_uid(sk), sock_i_ino(sk),
329 epb->bind_addr.port,
Neil Horman30e93562008-04-12 18:53:48 -0700330 assoc->peer.port);
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700331 seq_printf(seq, " ");
332 sctp_seq_dump_local_addrs(seq, epb);
333 seq_printf(seq, "<-> ");
334 sctp_seq_dump_remote_addrs(seq, assoc);
Neil Horman30e93562008-04-12 18:53:48 -0700335 seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d ",
336 assoc->hbinterval, assoc->c.sinit_max_instreams,
337 assoc->c.sinit_num_ostreams, assoc->max_retrans,
338 assoc->init_retries, assoc->shutdown_retries,
339 assoc->rtx_data_chunks);
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700340 seq_printf(seq, "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 }
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700342 read_unlock(&head->lock);
343 sctp_local_bh_enable();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
345 return 0;
346}
347
Philippe De Muyter56b3d972007-07-10 23:07:31 -0700348static const struct seq_operations sctp_assoc_ops = {
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700349 .start = sctp_assocs_seq_start,
350 .next = sctp_assocs_seq_next,
351 .stop = sctp_assocs_seq_stop,
352 .show = sctp_assocs_seq_show,
353};
354
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355/* Initialize the seq file operations for 'assocs' object. */
356static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
357{
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700358 return seq_open(file, &sctp_assoc_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359}
360
Arjan van de Venda7071d2007-02-12 00:55:36 -0800361static const struct file_operations sctp_assocs_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 .open = sctp_assocs_seq_open,
363 .read = seq_read,
364 .llseek = seq_lseek,
Vladislav Yasevichbca735b2005-06-13 15:11:57 -0700365 .release = seq_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366};
367
368/* Set up the proc fs entry for 'assocs' object. */
369int __init sctp_assocs_proc_init(void)
370{
371 struct proc_dir_entry *p;
372
Pavel Emelyanov459eea72008-02-29 11:24:45 -0800373 p = proc_create("assocs", S_IRUGO, proc_net_sctp,
374 &sctp_assocs_seq_fops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 if (!p)
376 return -ENOMEM;
377
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 return 0;
379}
380
381/* Cleanup the proc fs entry for 'assocs' object. */
382void sctp_assocs_proc_exit(void)
383{
384 remove_proc_entry("assocs", proc_net_sctp);
385}
Neil Horman20c2c1f2008-05-09 15:14:50 -0700386
387static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
388{
389 if (*pos >= sctp_assoc_hashsize)
390 return NULL;
391
392 if (*pos < 0)
393 *pos = 0;
394
395 if (*pos == 0)
396 seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
397 "REM_ADDR_RTX START\n");
398
399 return (void *)pos;
400}
401
402static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos)
403{
404 if (++*pos >= sctp_assoc_hashsize)
405 return NULL;
406
407 return pos;
408}
409
410static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
411{
412 return;
413}
414
415static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
416{
417 struct sctp_hashbucket *head;
418 struct sctp_ep_common *epb;
419 struct sctp_association *assoc;
420 struct hlist_node *node;
421 struct sctp_transport *tsp;
422 int hash = *(loff_t *)v;
423
424 if (hash >= sctp_assoc_hashsize)
425 return -ENOMEM;
426
427 head = &sctp_assoc_hashtable[hash];
428 sctp_local_bh_disable();
429 read_lock(&head->lock);
430 sctp_for_each_hentry(epb, node, &head->chain) {
431 assoc = sctp_assoc(epb);
432 list_for_each_entry(tsp, &assoc->peer.transport_addr_list,
433 transports) {
434 /*
435 * The remote address (ADDR)
436 */
437 tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
438 seq_printf(seq, " ");
439
440 /*
441 * The association ID (ASSOC_ID)
442 */
443 seq_printf(seq, "%d ", tsp->asoc->assoc_id);
444
445 /*
446 * If the Heartbeat is active (HB_ACT)
447 * Note: 1 = Active, 0 = Inactive
448 */
449 seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
450
451 /*
452 * Retransmit time out (RTO)
453 */
454 seq_printf(seq, "%lu ", tsp->rto);
455
456 /*
457 * Maximum path retransmit count (PATH_MAX_RTX)
458 */
459 seq_printf(seq, "%d ", tsp->pathmaxrxt);
460
461 /*
462 * remote address retransmit count (REM_ADDR_RTX)
463 * Note: We don't have a way to tally this at the moment
464 * so lets just leave it as zero for the moment
465 */
466 seq_printf(seq, "0 ");
467
468 /*
469 * remote address start time (START). This is also not
470 * currently implemented, but we can record it with a
471 * jiffies marker in a subsequent patch
472 */
473 seq_printf(seq, "0");
474
475 seq_printf(seq, "\n");
476 }
477 }
478
479 read_unlock(&head->lock);
480 sctp_local_bh_enable();
481
482 return 0;
483
484}
485
486static const struct seq_operations sctp_remaddr_ops = {
487 .start = sctp_remaddr_seq_start,
488 .next = sctp_remaddr_seq_next,
489 .stop = sctp_remaddr_seq_stop,
490 .show = sctp_remaddr_seq_show,
491};
492
493/* Cleanup the proc fs entry for 'remaddr' object. */
494void sctp_remaddr_proc_exit(void)
495{
496 remove_proc_entry("remaddr", proc_net_sctp);
497}
498
499static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
500{
501 return seq_open(file, &sctp_remaddr_ops);
502}
503
504static const struct file_operations sctp_remaddr_seq_fops = {
505 .open = sctp_remaddr_seq_open,
506 .read = seq_read,
507 .llseek = seq_lseek,
508 .release = seq_release,
509};
510
511int __init sctp_remaddr_proc_init(void)
512{
513 struct proc_dir_entry *p;
514
Alexey Dobriyand71a09e2009-08-23 23:11:36 +0400515 p = proc_create("remaddr", S_IRUGO, proc_net_sctp, &sctp_remaddr_seq_fops);
Neil Horman20c2c1f2008-05-09 15:14:50 -0700516 if (!p)
517 return -ENOMEM;
Neil Horman20c2c1f2008-05-09 15:14:50 -0700518 return 0;
519}