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 (i = 0; i < NR_CPUS; i++) { 73 if (!cpu_possible(i)) 74 continue; 75 res += 76 *((unsigned long *) (((void *) per_cpu_ptr(mib[0], i)) + 77 sizeof (unsigned long) * nr)); 78 res += 79 *((unsigned long *) (((void *) per_cpu_ptr(mib[1], i)) + 80 sizeof (unsigned long) * nr)); 81 } 82 return res; 83 } 84 85 /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */ 86 static int sctp_snmp_seq_show(struct seq_file *seq, void *v) 87 { 88 int i; 89 90 for (i = 0; sctp_snmp_list[i].name != NULL; i++) 91 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name, 92 fold_field((void **)sctp_statistics, 93 sctp_snmp_list[i].entry)); 94 95 return 0; 96 } 97 98 /* Initialize the seq file operations for 'snmp' object. */ 99 static int sctp_snmp_seq_open(struct inode *inode, struct file *file) 100 { 101 return single_open(file, sctp_snmp_seq_show, NULL); 102 } 103 104 static struct file_operations sctp_snmp_seq_fops = { 105 .owner = THIS_MODULE, 106 .open = sctp_snmp_seq_open, 107 .read = seq_read, 108 .llseek = seq_lseek, 109 .release = single_release, 110 }; 111 112 /* Set up the proc fs entry for 'snmp' object. */ 113 int __init sctp_snmp_proc_init(void) 114 { 115 struct proc_dir_entry *p; 116 117 p = create_proc_entry("snmp", S_IRUGO, proc_net_sctp); 118 if (!p) 119 return -ENOMEM; 120 121 p->proc_fops = &sctp_snmp_seq_fops; 122 123 return 0; 124 } 125 126 /* Cleanup the proc fs entry for 'snmp' object. */ 127 void sctp_snmp_proc_exit(void) 128 { 129 remove_proc_entry("snmp", proc_net_sctp); 130 } 131 132 /* Dump local addresses of an association/endpoint. */ 133 static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb) 134 { 135 struct list_head *pos; 136 struct sctp_association *asoc; 137 struct sctp_sockaddr_entry *laddr; 138 struct sctp_transport *peer; 139 union sctp_addr *addr, *primary = NULL; 140 struct sctp_af *af; 141 142 if (epb->type == SCTP_EP_TYPE_ASSOCIATION) { 143 asoc = sctp_assoc(epb); 144 peer = asoc->peer.primary_path; 145 primary = &peer->saddr; 146 } 147 148 list_for_each(pos, &epb->bind_addr.address_list) { 149 laddr = list_entry(pos, struct sctp_sockaddr_entry, list); 150 addr = (union sctp_addr *)&laddr->a; 151 af = sctp_get_af_specific(addr->sa.sa_family); 152 if (primary && af->cmp_addr(addr, primary)) { 153 seq_printf(seq, "*"); 154 } 155 af->seq_dump_addr(seq, addr); 156 } 157 } 158 159 /* Dump remote addresses of an association. */ 160 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc) 161 { 162 struct list_head *pos; 163 struct sctp_transport *transport; 164 union sctp_addr *addr, *primary; 165 struct sctp_af *af; 166 167 primary = &(assoc->peer.primary_addr); 168 list_for_each(pos, &assoc->peer.transport_addr_list) { 169 transport = list_entry(pos, struct sctp_transport, transports); 170 addr = (union sctp_addr *)&transport->ipaddr; 171 af = sctp_get_af_specific(addr->sa.sa_family); 172 if (af->cmp_addr(addr, primary)) { 173 seq_printf(seq, "*"); 174 } 175 af->seq_dump_addr(seq, addr); 176 } 177 } 178 179 static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos) 180 { 181 if (*pos > sctp_ep_hashsize) 182 return NULL; 183 184 if (*pos < 0) 185 *pos = 0; 186 187 if (*pos == 0) 188 seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n"); 189 190 ++*pos; 191 192 return (void *)pos; 193 } 194 195 static void sctp_eps_seq_stop(struct seq_file *seq, void *v) 196 { 197 return; 198 } 199 200 201 static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos) 202 { 203 if (*pos > sctp_ep_hashsize) 204 return NULL; 205 206 ++*pos; 207 208 return pos; 209 } 210 211 212 /* Display sctp endpoints (/proc/net/sctp/eps). */ 213 static int sctp_eps_seq_show(struct seq_file *seq, void *v) 214 { 215 struct sctp_hashbucket *head; 216 struct sctp_ep_common *epb; 217 struct sctp_endpoint *ep; 218 struct sock *sk; 219 int hash = *(int *)v; 220 221 if (hash > sctp_ep_hashsize) 222 return -ENOMEM; 223 224 head = &sctp_ep_hashtable[hash-1]; 225 sctp_local_bh_disable(); 226 read_lock(&head->lock); 227 for (epb = head->chain; epb; epb = epb->next) { 228 ep = sctp_ep(epb); 229 sk = epb->sk; 230 seq_printf(seq, "%8p %8p %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk, 231 sctp_sk(sk)->type, sk->sk_state, hash-1, 232 epb->bind_addr.port, 233 sock_i_uid(sk), sock_i_ino(sk)); 234 235 sctp_seq_dump_local_addrs(seq, epb); 236 seq_printf(seq, "\n"); 237 } 238 read_unlock(&head->lock); 239 sctp_local_bh_enable(); 240 241 return 0; 242 } 243 244 static 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, 249 }; 250 251 252 /* Initialize the seq file operations for 'eps' object. */ 253 static int sctp_eps_seq_open(struct inode *inode, struct file *file) 254 { 255 return seq_open(file, &sctp_eps_ops); 256 } 257 258 static struct file_operations sctp_eps_seq_fops = { 259 .open = sctp_eps_seq_open, 260 .read = seq_read, 261 .llseek = seq_lseek, 262 .release = seq_release, 263 }; 264 265 /* Set up the proc fs entry for 'eps' object. */ 266 int __init sctp_eps_proc_init(void) 267 { 268 struct proc_dir_entry *p; 269 270 p = create_proc_entry("eps", S_IRUGO, proc_net_sctp); 271 if (!p) 272 return -ENOMEM; 273 274 p->proc_fops = &sctp_eps_seq_fops; 275 276 return 0; 277 } 278 279 /* Cleanup the proc fs entry for 'eps' object. */ 280 void sctp_eps_proc_exit(void) 281 { 282 remove_proc_entry("eps", proc_net_sctp); 283 } 284 285 286 static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos) 287 { 288 if (*pos > sctp_assoc_hashsize) 289 return NULL; 290 291 if (*pos < 0) 292 *pos = 0; 293 294 if (*pos == 0) 295 seq_printf(seq, " ASSOC SOCK STY SST ST HBKT ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT " 296 "RPORT LADDRS <-> RADDRS\n"); 297 298 ++*pos; 299 300 return (void *)pos; 301 } 302 303 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v) 304 { 305 return; 306 } 307 308 309 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos) 310 { 311 if (*pos > sctp_assoc_hashsize) 312 return NULL; 313 314 ++*pos; 315 316 return pos; 317 } 318 319 /* Display sctp associations (/proc/net/sctp/assocs). */ 320 static int sctp_assocs_seq_show(struct seq_file *seq, void *v) 321 { 322 struct sctp_hashbucket *head; 323 struct sctp_ep_common *epb; 324 struct sctp_association *assoc; 325 struct sock *sk; 326 int hash = *(int *)v; 327 328 if (hash > sctp_assoc_hashsize) 329 return -ENOMEM; 330 331 head = &sctp_assoc_hashtable[hash-1]; 332 sctp_local_bh_disable(); 333 read_lock(&head->lock); 334 for (epb = head->chain; epb; epb = epb->next) { 335 assoc = sctp_assoc(epb); 336 sk = epb->sk; 337 seq_printf(seq, 338 "%8p %8p %-3d %-3d %-2d %-4d %4d %8d %8d %7d %5lu %-5d %5d ", 339 assoc, sk, sctp_sk(sk)->type, sk->sk_state, 340 assoc->state, hash-1, assoc->assoc_id, 341 (sk->sk_rcvbuf - assoc->rwnd), 342 assoc->sndbuf_used, 343 sock_i_uid(sk), sock_i_ino(sk), 344 epb->bind_addr.port, 345 assoc->peer.port); 346 347 seq_printf(seq, " "); 348 sctp_seq_dump_local_addrs(seq, epb); 349 seq_printf(seq, "<-> "); 350 sctp_seq_dump_remote_addrs(seq, assoc); 351 seq_printf(seq, "\n"); 352 } 353 read_unlock(&head->lock); 354 sctp_local_bh_enable(); 355 356 return 0; 357 } 358 359 static struct seq_operations sctp_assoc_ops = { 360 .start = sctp_assocs_seq_start, 361 .next = sctp_assocs_seq_next, 362 .stop = sctp_assocs_seq_stop, 363 .show = sctp_assocs_seq_show, 364 }; 365 366 /* Initialize the seq file operations for 'assocs' object. */ 367 static int sctp_assocs_seq_open(struct inode *inode, struct file *file) 368 { 369 return seq_open(file, &sctp_assoc_ops); 370 } 371 372 static struct file_operations sctp_assocs_seq_fops = { 373 .open = sctp_assocs_seq_open, 374 .read = seq_read, 375 .llseek = seq_lseek, 376 .release = seq_release, 377 }; 378 379 /* Set up the proc fs entry for 'assocs' object. */ 380 int __init sctp_assocs_proc_init(void) 381 { 382 struct proc_dir_entry *p; 383 384 p = create_proc_entry("assocs", S_IRUGO, proc_net_sctp); 385 if (!p) 386 return -ENOMEM; 387 388 p->proc_fops = &sctp_assocs_seq_fops; 389 390 return 0; 391 } 392 393 /* Cleanup the proc fs entry for 'assocs' object. */ 394 void sctp_assocs_proc_exit(void) 395 { 396 remove_proc_entry("assocs", proc_net_sctp); 397 } 398