net/sctp/proc.c

   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 }