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_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         return (void *)pos;
 189 }
 190
 191 static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
 192 {
 193         return;
 194 }
 195
 196
 197 static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 198 {
 199         if (++*pos >= sctp_ep_hashsize)
 200                 return NULL;
 201
 202         return pos;
 203 }
 204
 205
 206 /* Display sctp endpoints (/proc/net/sctp/eps). */
 207 static int sctp_eps_seq_show(struct seq_file *seq, void *v)
 208 {
 209         struct sctp_hashbucket *head;
 210         struct sctp_ep_common *epb;
 211         struct sctp_endpoint *ep;
 212         struct sock *sk;
 213         int    hash = *(loff_t *)v;
 214
 215         if (hash >= sctp_ep_hashsize)
 216                 return -ENOMEM;
 217
 218         head = &sctp_ep_hashtable[hash];
 219         sctp_local_bh_disable();
 220         read_lock(&head->lock);
 221         for (epb = head->chain; epb; epb = epb->next) {
 222                 ep = sctp_ep(epb);
 223                 sk = epb->sk;
 224                 seq_printf(seq, "%8p %8p %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk,
 225                            sctp_sk(sk)->type, sk->sk_state, hash,
 226                            epb->bind_addr.port,
 227                            sock_i_uid(sk), sock_i_ino(sk));
 228
 229                 sctp_seq_dump_local_addrs(seq, epb);
 230                 seq_printf(seq, "\n");
 231         }
 232         read_unlock(&head->lock);
 233         sctp_local_bh_enable();
 234
 235         return 0;
 236 }
 237
 238 static struct seq_operations sctp_eps_ops = {
 239         .start = sctp_eps_seq_start,
 240         .next  = sctp_eps_seq_next,
 241         .stop  = sctp_eps_seq_stop,
 242         .show  = sctp_eps_seq_show,
 243 };
 244
 245
 246 /* Initialize the seq file operations for 'eps' object. */
 247 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
 248 {
 249         return seq_open(file, &sctp_eps_ops);
 250 }
 251
 252 static struct file_operations sctp_eps_seq_fops = {
 253         .open    = sctp_eps_seq_open,
 254         .read    = seq_read,
 255         .llseek  = seq_lseek,
 256         .release = seq_release,
 257 };
 258
 259 /* Set up the proc fs entry for 'eps' object. */
 260 int __init sctp_eps_proc_init(void)
 261 {
 262         struct proc_dir_entry *p;
 263
 264         p = create_proc_entry("eps", S_IRUGO, proc_net_sctp);
 265         if (!p)
 266                 return -ENOMEM;
 267
 268         p->proc_fops = &sctp_eps_seq_fops;
 269
 270         return 0;
 271 }
 272
 273 /* Cleanup the proc fs entry for 'eps' object. */
 274 void sctp_eps_proc_exit(void)
 275 {
 276         remove_proc_entry("eps", proc_net_sctp);
 277 }
 278
 279
 280 static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
 281 {
 282         if (*pos >= sctp_assoc_hashsize)
 283                 return NULL;
 284
 285         if (*pos < 0)
 286                 *pos = 0;
 287
 288         if (*pos == 0)
 289                 seq_printf(seq, " ASSOC     SOCK   STY SST ST HBKT ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
 290                                 "RPORT LADDRS <-> RADDRS\n");
 291
 292         return (void *)pos;
 293 }
 294
 295 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
 296 {
 297         return;
 298 }
 299
 300
 301 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 302 {
 303         if (++*pos >= sctp_assoc_hashsize)
 304                 return NULL;
 305
 306         return pos;
 307 }
 308
 309 /* Display sctp associations (/proc/net/sctp/assocs). */
 310 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
 311 {
 312         struct sctp_hashbucket *head;
 313         struct sctp_ep_common *epb;
 314         struct sctp_association *assoc;
 315         struct sock *sk;
 316         int    hash = *(loff_t *)v;
 317
 318         if (hash >= sctp_assoc_hashsize)
 319                 return -ENOMEM;
 320
 321         head = &sctp_assoc_hashtable[hash];
 322         sctp_local_bh_disable();
 323         read_lock(&head->lock);
 324         for (epb = head->chain; epb; epb = epb->next) {
 325                 assoc = sctp_assoc(epb);
 326                 sk = epb->sk;
 327                 seq_printf(seq,
 328                            "%8p %8p %-3d %-3d %-2d %-4d %4d %8d %8d %7d %5lu %-5d %5d ",
 329                            assoc, sk, sctp_sk(sk)->type, sk->sk_state,
 330                            assoc->state, hash, assoc->assoc_id,
 331                            (sk->sk_rcvbuf - assoc->rwnd),
 332                            assoc->sndbuf_used,
 333                            sock_i_uid(sk), sock_i_ino(sk),
 334                            epb->bind_addr.port,
 335                            assoc->peer.port);
 336
 337                 seq_printf(seq, " ");
 338                 sctp_seq_dump_local_addrs(seq, epb);
 339                 seq_printf(seq, "<-> ");
 340                 sctp_seq_dump_remote_addrs(seq, assoc);
 341                 seq_printf(seq, "\n");
 342         }
 343         read_unlock(&head->lock);
 344         sctp_local_bh_enable();
 345
 346         return 0;
 347 }
 348
 349 static struct seq_operations sctp_assoc_ops = {
 350         .start = sctp_assocs_seq_start,
 351         .next  = sctp_assocs_seq_next,
 352         .stop  = sctp_assocs_seq_stop,
 353         .show  = sctp_assocs_seq_show,
 354 };
 355
 356 /* Initialize the seq file operations for 'assocs' object. */
 357 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
 358 {
 359         return seq_open(file, &sctp_assoc_ops);
 360 }
 361
 362 static struct file_operations sctp_assocs_seq_fops = {
 363         .open    = sctp_assocs_seq_open,
 364         .read    = seq_read,
 365         .llseek  = seq_lseek,
 366         .release = seq_release,
 367 };
 368
 369 /* Set up the proc fs entry for 'assocs' object. */
 370 int __init sctp_assocs_proc_init(void)
 371 {
 372         struct proc_dir_entry *p;
 373
 374         p = create_proc_entry("assocs", S_IRUGO, proc_net_sctp);
 375         if (!p)
 376                 return -ENOMEM;
 377
 378         p->proc_fops = &sctp_assocs_seq_fops;
 379
 380         return 0;
 381 }
 382
 383 /* Cleanup the proc fs entry for 'assocs' object. */
 384 void sctp_assocs_proc_exit(void)
 385 {
 386         remove_proc_entry("assocs", proc_net_sctp);
 387 }