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
42 static char *sctp_snmp_list[] = {
43 #define SCTP_SNMP_ENTRY(x) #x
44 SCTP_SNMP_ENTRY(SctpCurrEstab),
45 SCTP_SNMP_ENTRY(SctpActiveEstabs),
46 SCTP_SNMP_ENTRY(SctpPassiveEstabs),
47 SCTP_SNMP_ENTRY(SctpAborteds),
48 SCTP_SNMP_ENTRY(SctpShutdowns),
49 SCTP_SNMP_ENTRY(SctpOutOfBlues),
50 SCTP_SNMP_ENTRY(SctpChecksumErrors),
51 SCTP_SNMP_ENTRY(SctpOutCtrlChunks),
52 SCTP_SNMP_ENTRY(SctpOutOrderChunks),
53 SCTP_SNMP_ENTRY(SctpOutUnorderChunks),
54 SCTP_SNMP_ENTRY(SctpInCtrlChunks),
55 SCTP_SNMP_ENTRY(SctpInOrderChunks),
56 SCTP_SNMP_ENTRY(SctpInUnorderChunks),
57 SCTP_SNMP_ENTRY(SctpFragUsrMsgs),
58 SCTP_SNMP_ENTRY(SctpReasmUsrMsgs),
59 SCTP_SNMP_ENTRY(SctpOutSCTPPacks),
60 SCTP_SNMP_ENTRY(SctpInSCTPPacks),
61 #undef SCTP_SNMP_ENTRY
62 };
63
64 /* Return the current value of a particular entry in the mib by adding its
65 * per cpu counters.
66 */
67 static unsigned long
fold_field(void * mib[],int nr)68 fold_field(void *mib[], int nr)
69 {
70 unsigned long res = 0;
71 int i;
72 int sz = sizeof(struct sctp_mib);
73 unsigned long* begin;
74
75 sz /= sizeof(unsigned long);
76 begin = (unsigned long*) mib;
77
78 for (i=0; i<smp_num_cpus; i++) {
79 res += begin[2*cpu_logical_map(i)*sz + nr];
80 res += begin[(2*cpu_logical_map(i)+1)*sz + nr];
81 }
82 return res;
83 }
84
85 /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
sctp_snmp_seq_show(struct seq_file * seq,void * v)86 static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
87 {
88 int i;
89
90 for (i = 0; i < sizeof(sctp_snmp_list) / sizeof(char *); i++)
91 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i],
92 fold_field((void **)sctp_statistics, i));
93
94 return 0;
95 }
96
97 /* Initialize the seq file operations for 'snmp' object. */
sctp_snmp_seq_open(struct inode * inode,struct file * file)98 static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
99 {
100 return single_open(file, sctp_snmp_seq_show, NULL);
101 }
102
103 static struct file_operations sctp_snmp_seq_fops = {
104 .owner = THIS_MODULE,
105 .open = sctp_snmp_seq_open,
106 .read = seq_read,
107 .llseek = seq_lseek,
108 .release = single_release,
109 };
110
111 /* Set up the proc fs entry for 'snmp' object. */
sctp_snmp_proc_init(void)112 int __init sctp_snmp_proc_init(void)
113 {
114 struct proc_dir_entry *p;
115
116 p = create_proc_entry("snmp", S_IRUGO, proc_net_sctp);
117 if (!p)
118 return -ENOMEM;
119
120 p->proc_fops = &sctp_snmp_seq_fops;
121
122 return 0;
123 }
124
125 /* Cleanup the proc fs entry for 'snmp' object. */
sctp_snmp_proc_exit(void)126 void sctp_snmp_proc_exit(void)
127 {
128 remove_proc_entry("snmp", proc_net_sctp);
129 }
130
131 /* Dump local addresses of an association/endpoint. */
sctp_seq_dump_local_addrs(struct seq_file * seq,struct sctp_ep_common * epb)132 static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
133 {
134 struct list_head *pos;
135 struct sctp_sockaddr_entry *laddr;
136 union sctp_addr *addr;
137 struct sctp_af *af;
138
139 list_for_each(pos, &epb->bind_addr.address_list) {
140 laddr = list_entry(pos, struct sctp_sockaddr_entry, list);
141 addr = (union sctp_addr *)&laddr->a;
142 af = sctp_get_af_specific(addr->sa.sa_family);
143 af->seq_dump_addr(seq, addr);
144 }
145 }
146
147 /* Dump remote addresses of an association. */
sctp_seq_dump_remote_addrs(struct seq_file * seq,struct sctp_association * assoc)148 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
149 {
150 struct list_head *pos;
151 struct sctp_transport *transport;
152 union sctp_addr *addr;
153 struct sctp_af *af;
154
155 list_for_each(pos, &assoc->peer.transport_addr_list) {
156 transport = list_entry(pos, struct sctp_transport, transports);
157 addr = (union sctp_addr *)&transport->ipaddr;
158 af = sctp_get_af_specific(addr->sa.sa_family);
159 af->seq_dump_addr(seq, addr);
160 }
161 }
162
163 /* Display sctp endpoints (/proc/net/sctp/eps). */
sctp_eps_seq_show(struct seq_file * seq,void * v)164 static int sctp_eps_seq_show(struct seq_file *seq, void *v)
165 {
166 struct sctp_hashbucket *head;
167 struct sctp_ep_common *epb;
168 struct sctp_endpoint *ep;
169 struct sock *sk;
170 int hash;
171
172 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT LADDRS\n");
173 for (hash = 0; hash < sctp_ep_hashsize; hash++) {
174 head = &sctp_ep_hashtable[hash];
175 read_lock(&head->lock);
176 for (epb = head->chain; epb; epb = epb->next) {
177 ep = sctp_ep(epb);
178 sk = epb->sk;
179 seq_printf(seq, "%8p %8p %-3d %-3d %-4d %-5d ", ep, sk,
180 sctp_sk(sk)->type, sk->state, hash,
181 epb->bind_addr.port);
182 sctp_seq_dump_local_addrs(seq, epb);
183 seq_printf(seq, "\n");
184 }
185 read_unlock(&head->lock);
186 }
187
188 return 0;
189 }
190
191 /* Initialize the seq file operations for 'eps' object. */
sctp_eps_seq_open(struct inode * inode,struct file * file)192 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
193 {
194 return single_open(file, sctp_eps_seq_show, NULL);
195 }
196
197 static struct file_operations sctp_eps_seq_fops = {
198 .open = sctp_eps_seq_open,
199 .read = seq_read,
200 .llseek = seq_lseek,
201 .release = single_release,
202 };
203
204 /* Set up the proc fs entry for 'eps' object. */
sctp_eps_proc_init(void)205 int __init sctp_eps_proc_init(void)
206 {
207 struct proc_dir_entry *p;
208
209 p = create_proc_entry("eps", S_IRUGO, proc_net_sctp);
210 if (!p)
211 return -ENOMEM;
212
213 p->proc_fops = &sctp_eps_seq_fops;
214
215 return 0;
216 }
217
218 /* Cleanup the proc fs entry for 'eps' object. */
sctp_eps_proc_exit(void)219 void sctp_eps_proc_exit(void)
220 {
221 remove_proc_entry("eps", proc_net_sctp);
222 }
223
224 /* Display sctp associations (/proc/net/sctp/assocs). */
sctp_assocs_seq_show(struct seq_file * seq,void * v)225 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
226 {
227 struct sctp_hashbucket *head;
228 struct sctp_ep_common *epb;
229 struct sctp_association *assoc;
230 struct sock *sk;
231 int hash;
232
233 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT LPORT RPORT "
234 "LADDRS <-> RADDRS\n");
235 for (hash = 0; hash < sctp_assoc_hashsize; hash++) {
236 head = &sctp_assoc_hashtable[hash];
237 read_lock(&head->lock);
238 for (epb = head->chain; epb; epb = epb->next) {
239 assoc = sctp_assoc(epb);
240 sk = epb->sk;
241 seq_printf(seq,
242 "%8p %8p %-3d %-3d %-2d %-4d %-5d %-5d ",
243 assoc, sk, sctp_sk(sk)->type, sk->state,
244 assoc->state, hash, epb->bind_addr.port,
245 assoc->peer.port);
246 sctp_seq_dump_local_addrs(seq, epb);
247 seq_printf(seq, "<-> ");
248 sctp_seq_dump_remote_addrs(seq, assoc);
249 seq_printf(seq, "\n");
250 }
251 read_unlock(&head->lock);
252 }
253
254 return 0;
255 }
256
257 /* Initialize the seq file operations for 'assocs' object. */
sctp_assocs_seq_open(struct inode * inode,struct file * file)258 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
259 {
260 return single_open(file, sctp_assocs_seq_show, NULL);
261 }
262
263 static struct file_operations sctp_assocs_seq_fops = {
264 .open = sctp_assocs_seq_open,
265 .read = seq_read,
266 .llseek = seq_lseek,
267 .release = single_release,
268 };
269
270 /* Set up the proc fs entry for 'assocs' object. */
sctp_assocs_proc_init(void)271 int __init sctp_assocs_proc_init(void)
272 {
273 struct proc_dir_entry *p;
274
275 p = create_proc_entry("assocs", S_IRUGO, proc_net_sctp);
276 if (!p)
277 return -ENOMEM;
278
279 p->proc_fops = &sctp_assocs_seq_fops;
280
281 return 0;
282 }
283
284 /* Cleanup the proc fs entry for 'assocs' object. */
sctp_assocs_proc_exit(void)285 void sctp_assocs_proc_exit(void)
286 {
287 remove_proc_entry("assocs", proc_net_sctp);
288 }
289