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