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Linux kernel mirror (for testing)
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1/* SCTP kernel reference Implementation
2 * Copyright (c) 2003 International Business Machines, Corp.
3 *
4 * This file is part of the SCTP kernel reference Implementation
5 *
6 * The SCTP reference 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)
10 * any later version.
11 *
12 * The SCTP reference 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.
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>
41
42static struct snmp_mib sctp_snmp_list[] = {
43 SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB),
44 SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS),
45 SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS),
46 SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS),
47 SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS),
48 SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES),
49 SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS),
50 SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS),
51 SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS),
52 SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS),
53 SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS),
54 SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS),
55 SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS),
56 SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS),
57 SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS),
58 SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS),
59 SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS),
60 SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
61 SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
62 SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
63 SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
64 SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
65 SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
66 SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
67 SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
68 SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
69 SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
70 SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
71 SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
72 SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
73 SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
74 SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
75 SNMP_MIB_SENTINEL
76};
77
78/* Return the current value of a particular entry in the mib by adding its
79 * per cpu counters.
80 */
81static unsigned long
82fold_field(void *mib[], int nr)
83{
84 unsigned long res = 0;
85 int i;
86
87 for_each_possible_cpu(i) {
88 res +=
89 *((unsigned long *) (((void *) per_cpu_ptr(mib[0], i)) +
90 sizeof (unsigned long) * nr));
91 res +=
92 *((unsigned long *) (((void *) per_cpu_ptr(mib[1], i)) +
93 sizeof (unsigned long) * nr));
94 }
95 return res;
96}
97
98/* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
99static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
100{
101 int i;
102
103 for (i = 0; sctp_snmp_list[i].name != NULL; i++)
104 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
105 fold_field((void **)sctp_statistics,
106 sctp_snmp_list[i].entry));
107
108 return 0;
109}
110
111/* Initialize the seq file operations for 'snmp' object. */
112static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
113{
114 return single_open(file, sctp_snmp_seq_show, NULL);
115}
116
117static struct file_operations sctp_snmp_seq_fops = {
118 .owner = THIS_MODULE,
119 .open = sctp_snmp_seq_open,
120 .read = seq_read,
121 .llseek = seq_lseek,
122 .release = single_release,
123};
124
125/* Set up the proc fs entry for 'snmp' object. */
126int __init sctp_snmp_proc_init(void)
127{
128 struct proc_dir_entry *p;
129
130 p = create_proc_entry("snmp", S_IRUGO, proc_net_sctp);
131 if (!p)
132 return -ENOMEM;
133
134 p->proc_fops = &sctp_snmp_seq_fops;
135
136 return 0;
137}
138
139/* Cleanup the proc fs entry for 'snmp' object. */
140void sctp_snmp_proc_exit(void)
141{
142 remove_proc_entry("snmp", proc_net_sctp);
143}
144
145/* Dump local addresses of an association/endpoint. */
146static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
147{
148 struct list_head *pos;
149 struct sctp_association *asoc;
150 struct sctp_sockaddr_entry *laddr;
151 struct sctp_transport *peer;
152 union sctp_addr *addr, *primary = NULL;
153 struct sctp_af *af;
154
155 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
156 asoc = sctp_assoc(epb);
157 peer = asoc->peer.primary_path;
158 primary = &peer->saddr;
159 }
160
161 list_for_each(pos, &epb->bind_addr.address_list) {
162 laddr = list_entry(pos, struct sctp_sockaddr_entry, list);
163 addr = &laddr->a;
164 af = sctp_get_af_specific(addr->sa.sa_family);
165 if (primary && af->cmp_addr(addr, primary)) {
166 seq_printf(seq, "*");
167 }
168 af->seq_dump_addr(seq, addr);
169 }
170}
171
172/* Dump remote addresses of an association. */
173static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
174{
175 struct list_head *pos;
176 struct sctp_transport *transport;
177 union sctp_addr *addr, *primary;
178 struct sctp_af *af;
179
180 primary = &assoc->peer.primary_addr;
181 list_for_each(pos, &assoc->peer.transport_addr_list) {
182 transport = list_entry(pos, struct sctp_transport, transports);
183 addr = &transport->ipaddr;
184 af = sctp_get_af_specific(addr->sa.sa_family);
185 if (af->cmp_addr(addr, primary)) {
186 seq_printf(seq, "*");
187 }
188 af->seq_dump_addr(seq, addr);
189 }
190}
191
192static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
193{
194 if (*pos >= sctp_ep_hashsize)
195 return NULL;
196
197 if (*pos < 0)
198 *pos = 0;
199
200 if (*pos == 0)
201 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n");
202
203 return (void *)pos;
204}
205
206static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
207{
208 return;
209}
210
211
212static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
213{
214 if (++*pos >= sctp_ep_hashsize)
215 return NULL;
216
217 return pos;
218}
219
220
221/* Display sctp endpoints (/proc/net/sctp/eps). */
222static int sctp_eps_seq_show(struct seq_file *seq, void *v)
223{
224 struct sctp_hashbucket *head;
225 struct sctp_ep_common *epb;
226 struct sctp_endpoint *ep;
227 struct sock *sk;
228 int hash = *(loff_t *)v;
229
230 if (hash >= sctp_ep_hashsize)
231 return -ENOMEM;
232
233 head = &sctp_ep_hashtable[hash];
234 sctp_local_bh_disable();
235 read_lock(&head->lock);
236 for (epb = head->chain; epb; epb = epb->next) {
237 ep = sctp_ep(epb);
238 sk = epb->sk;
239 seq_printf(seq, "%8p %8p %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk,
240 sctp_sk(sk)->type, sk->sk_state, hash,
241 epb->bind_addr.port,
242 sock_i_uid(sk), sock_i_ino(sk));
243
244 sctp_seq_dump_local_addrs(seq, epb);
245 seq_printf(seq, "\n");
246 }
247 read_unlock(&head->lock);
248 sctp_local_bh_enable();
249
250 return 0;
251}
252
253static struct seq_operations sctp_eps_ops = {
254 .start = sctp_eps_seq_start,
255 .next = sctp_eps_seq_next,
256 .stop = sctp_eps_seq_stop,
257 .show = sctp_eps_seq_show,
258};
259
260
261/* Initialize the seq file operations for 'eps' object. */
262static int sctp_eps_seq_open(struct inode *inode, struct file *file)
263{
264 return seq_open(file, &sctp_eps_ops);
265}
266
267static struct file_operations sctp_eps_seq_fops = {
268 .open = sctp_eps_seq_open,
269 .read = seq_read,
270 .llseek = seq_lseek,
271 .release = seq_release,
272};
273
274/* Set up the proc fs entry for 'eps' object. */
275int __init sctp_eps_proc_init(void)
276{
277 struct proc_dir_entry *p;
278
279 p = create_proc_entry("eps", S_IRUGO, proc_net_sctp);
280 if (!p)
281 return -ENOMEM;
282
283 p->proc_fops = &sctp_eps_seq_fops;
284
285 return 0;
286}
287
288/* Cleanup the proc fs entry for 'eps' object. */
289void sctp_eps_proc_exit(void)
290{
291 remove_proc_entry("eps", proc_net_sctp);
292}
293
294
295static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
296{
297 if (*pos >= sctp_assoc_hashsize)
298 return NULL;
299
300 if (*pos < 0)
301 *pos = 0;
302
303 if (*pos == 0)
304 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
305 "RPORT LADDRS <-> RADDRS\n");
306
307 return (void *)pos;
308}
309
310static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
311{
312 return;
313}
314
315
316static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
317{
318 if (++*pos >= sctp_assoc_hashsize)
319 return NULL;
320
321 return pos;
322}
323
324/* Display sctp associations (/proc/net/sctp/assocs). */
325static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
326{
327 struct sctp_hashbucket *head;
328 struct sctp_ep_common *epb;
329 struct sctp_association *assoc;
330 struct sock *sk;
331 int hash = *(loff_t *)v;
332
333 if (hash >= sctp_assoc_hashsize)
334 return -ENOMEM;
335
336 head = &sctp_assoc_hashtable[hash];
337 sctp_local_bh_disable();
338 read_lock(&head->lock);
339 for (epb = head->chain; epb; epb = epb->next) {
340 assoc = sctp_assoc(epb);
341 sk = epb->sk;
342 seq_printf(seq,
343 "%8p %8p %-3d %-3d %-2d %-4d %4d %8d %8d %7d %5lu %-5d %5d ",
344 assoc, sk, sctp_sk(sk)->type, sk->sk_state,
345 assoc->state, hash, assoc->assoc_id,
346 assoc->sndbuf_used,
347 atomic_read(&assoc->rmem_alloc),
348 sock_i_uid(sk), sock_i_ino(sk),
349 epb->bind_addr.port,
350 assoc->peer.port);
351
352 seq_printf(seq, " ");
353 sctp_seq_dump_local_addrs(seq, epb);
354 seq_printf(seq, "<-> ");
355 sctp_seq_dump_remote_addrs(seq, assoc);
356 seq_printf(seq, "\n");
357 }
358 read_unlock(&head->lock);
359 sctp_local_bh_enable();
360
361 return 0;
362}
363
364static struct seq_operations sctp_assoc_ops = {
365 .start = sctp_assocs_seq_start,
366 .next = sctp_assocs_seq_next,
367 .stop = sctp_assocs_seq_stop,
368 .show = sctp_assocs_seq_show,
369};
370
371/* Initialize the seq file operations for 'assocs' object. */
372static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
373{
374 return seq_open(file, &sctp_assoc_ops);
375}
376
377static struct file_operations sctp_assocs_seq_fops = {
378 .open = sctp_assocs_seq_open,
379 .read = seq_read,
380 .llseek = seq_lseek,
381 .release = seq_release,
382};
383
384/* Set up the proc fs entry for 'assocs' object. */
385int __init sctp_assocs_proc_init(void)
386{
387 struct proc_dir_entry *p;
388
389 p = create_proc_entry("assocs", S_IRUGO, proc_net_sctp);
390 if (!p)
391 return -ENOMEM;
392
393 p->proc_fops = &sctp_assocs_seq_fops;
394
395 return 0;
396}
397
398/* Cleanup the proc fs entry for 'assocs' object. */
399void sctp_assocs_proc_exit(void)
400{
401 remove_proc_entry("assocs", proc_net_sctp);
402}