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