net/sctp/proc.c

   1 /* SCTP kernel implementation
   2  * Copyright (c) 2003 International Business Machines, Corp.
   3  *
   4  * This file is part of the SCTP kernel implementation
   5  *
   6  * This SCTP 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  * This SCTP 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_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
  61         SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
  62         SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
  63         SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
  64         SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
  65         SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
  66         SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
  67         SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
  68         SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
  69         SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
  70         SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
  71         SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
  72         SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
  73         SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
  74         SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
  75         SNMP_MIB_SENTINEL
  76 };
  77
  78 /* Return the current value of a particular entry in the mib by adding its
  79  * per cpu counters.
  80  */
  81 static unsigned long
  82 fold_field(void *mib[], int nr)
  83 {
  84         unsigned long res = 0;
  85         int i;
  86
  87         for_each_possible_cpu(i) {
  88                 res +=
  89                     *((unsigned long *) (((void *) per_cpu_ptr(mib[0], i)) +
  90                                          sizeof (unsigned long) * nr));
  91                 res +=
  92                     *((unsigned long *) (((void *) per_cpu_ptr(mib[1], i)) +
  93                                          sizeof (unsigned long) * nr));
  94         }
  95         return res;
  96 }
  97
  98 /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
  99 static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
 100 {
 101         int i;
 102
 103         for (i = 0; sctp_snmp_list[i].name != NULL; i++)
 104                 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
 105                            fold_field((void **)sctp_statistics,
 106                                       sctp_snmp_list[i].entry));
 107
 108         return 0;
 109 }
 110
 111 /* Initialize the seq file operations for 'snmp' object. */
 112 static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
 113 {
 114         return single_open(file, sctp_snmp_seq_show, NULL);
 115 }
 116
 117 static const struct file_operations sctp_snmp_seq_fops = {
 118         .owner   = THIS_MODULE,
 119         .open    = sctp_snmp_seq_open,
 120         .read    = seq_read,
 121         .llseek  = seq_lseek,
 122         .release = single_release,
 123 };
 124
 125 /* Set up the proc fs entry for 'snmp' object. */
 126 int __init sctp_snmp_proc_init(void)
 127 {
 128         struct proc_dir_entry *p;
 129
 130         p = create_proc_entry("snmp", S_IRUGO, proc_net_sctp);
 131         if (!p)
 132                 return -ENOMEM;
 133
 134         p->proc_fops = &sctp_snmp_seq_fops;
 135
 136         return 0;
 137 }
 138
 139 /* Cleanup the proc fs entry for 'snmp' object. */
 140 void sctp_snmp_proc_exit(void)
 141 {
 142         remove_proc_entry("snmp", proc_net_sctp);
 143 }
 144
 145 /* Dump local addresses of an association/endpoint. */
 146 static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
 147 {
 148         struct list_head *pos;
 149         struct sctp_association *asoc;
 150         struct sctp_sockaddr_entry *laddr;
 151         struct sctp_transport *peer;
 152         union sctp_addr *addr, *primary = NULL;
 153         struct sctp_af *af;
 154
 155         if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
 156             asoc = sctp_assoc(epb);
 157             peer = asoc->peer.primary_path;
 158             primary = &peer->saddr;
 159         }
 160
 161         list_for_each(pos, &epb->bind_addr.address_list) {
 162                 laddr = list_entry(pos, struct sctp_sockaddr_entry, list);
 163                 addr = &laddr->a;
 164                 af = sctp_get_af_specific(addr->sa.sa_family);
 165                 if (primary && af->cmp_addr(addr, primary)) {
 166                         seq_printf(seq, "*");
 167                 }
 168                 af->seq_dump_addr(seq, addr);
 169         }
 170 }
 171
 172 /* Dump remote addresses of an association. */
 173 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
 174 {
 175         struct list_head *pos;
 176         struct sctp_transport *transport;
 177         union sctp_addr *addr, *primary;
 178         struct sctp_af *af;
 179
 180         primary = &assoc->peer.primary_addr;
 181         list_for_each(pos, &assoc->peer.transport_addr_list) {
 182                 transport = list_entry(pos, struct sctp_transport, transports);
 183                 addr = &transport->ipaddr;
 184                 af = sctp_get_af_specific(addr->sa.sa_family);
 185                 if (af->cmp_addr(addr, primary)) {
 186                         seq_printf(seq, "*");
 187                 }
 188                 af->seq_dump_addr(seq, addr);
 189         }
 190 }
 191
 192 static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
 193 {
 194         if (*pos >= sctp_ep_hashsize)
 195                 return NULL;
 196
 197         if (*pos < 0)
 198                 *pos = 0;
 199
 200         if (*pos == 0)
 201                 seq_printf(seq, " ENDPT     SOCK   STY SST HBKT LPORT   UID INODE LADDRS\n");
 202
 203         return (void *)pos;
 204 }
 205
 206 static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
 207 {
 208         return;
 209 }
 210
 211
 212 static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 213 {
 214         if (++*pos >= sctp_ep_hashsize)
 215                 return NULL;
 216
 217         return pos;
 218 }
 219
 220
 221 /* Display sctp endpoints (/proc/net/sctp/eps). */
 222 static int sctp_eps_seq_show(struct seq_file *seq, void *v)
 223 {
 224         struct sctp_hashbucket *head;
 225         struct sctp_ep_common *epb;
 226         struct sctp_endpoint *ep;
 227         struct sock *sk;
 228         struct hlist_node *node;
 229         int    hash = *(loff_t *)v;
 230
 231         if (hash >= sctp_ep_hashsize)
 232                 return -ENOMEM;
 233
 234         head = &sctp_ep_hashtable[hash];
 235         sctp_local_bh_disable();
 236         read_lock(&head->lock);
 237         sctp_for_each_hentry(epb, node, &head->chain) {
 238                 ep = sctp_ep(epb);
 239                 sk = epb->sk;
 240                 seq_printf(seq, "%8p %8p %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk,
 241                            sctp_sk(sk)->type, sk->sk_state, hash,
 242                            epb->bind_addr.port,
 243                            sock_i_uid(sk), sock_i_ino(sk));
 244
 245                 sctp_seq_dump_local_addrs(seq, epb);
 246                 seq_printf(seq, "\n");
 247         }
 248         read_unlock(&head->lock);
 249         sctp_local_bh_enable();
 250
 251         return 0;
 252 }
 253
 254 static const struct seq_operations sctp_eps_ops = {
 255         .start = sctp_eps_seq_start,
 256         .next  = sctp_eps_seq_next,
 257         .stop  = sctp_eps_seq_stop,
 258         .show  = sctp_eps_seq_show,
 259 };
 260
 261
 262 /* Initialize the seq file operations for 'eps' object. */
 263 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
 264 {
 265         return seq_open(file, &sctp_eps_ops);
 266 }
 267
 268 static const struct file_operations sctp_eps_seq_fops = {
 269         .open    = sctp_eps_seq_open,
 270         .read    = seq_read,
 271         .llseek  = seq_lseek,
 272         .release = seq_release,
 273 };
 274
 275 /* Set up the proc fs entry for 'eps' object. */
 276 int __init sctp_eps_proc_init(void)
 277 {
 278         struct proc_dir_entry *p;
 279
 280         p = create_proc_entry("eps", S_IRUGO, proc_net_sctp);
 281         if (!p)
 282                 return -ENOMEM;
 283
 284         p->proc_fops = &sctp_eps_seq_fops;
 285
 286         return 0;
 287 }
 288
 289 /* Cleanup the proc fs entry for 'eps' object. */
 290 void sctp_eps_proc_exit(void)
 291 {
 292         remove_proc_entry("eps", proc_net_sctp);
 293 }
 294
 295
 296 static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
 297 {
 298         if (*pos >= sctp_assoc_hashsize)
 299                 return NULL;
 300
 301         if (*pos < 0)
 302                 *pos = 0;
 303
 304         if (*pos == 0)
 305                 seq_printf(seq, " ASSOC     SOCK   STY SST ST HBKT ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
 306                                 "RPORT LADDRS <-> RADDRS\n");
 307
 308         return (void *)pos;
 309 }
 310
 311 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
 312 {
 313         return;
 314 }
 315
 316
 317 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 318 {
 319         if (++*pos >= sctp_assoc_hashsize)
 320                 return NULL;
 321
 322         return pos;
 323 }
 324
 325 /* Display sctp associations (/proc/net/sctp/assocs). */
 326 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
 327 {
 328         struct sctp_hashbucket *head;
 329         struct sctp_ep_common *epb;
 330         struct sctp_association *assoc;
 331         struct sock *sk;
 332         struct hlist_node *node;
 333         int    hash = *(loff_t *)v;
 334
 335         if (hash >= sctp_assoc_hashsize)
 336                 return -ENOMEM;
 337
 338         head = &sctp_assoc_hashtable[hash];
 339         sctp_local_bh_disable();
 340         read_lock(&head->lock);
 341         sctp_for_each_hentry(epb, node, &head->chain) {
 342                 assoc = sctp_assoc(epb);
 343                 sk = epb->sk;
 344                 seq_printf(seq,
 345                            "%8p %8p %-3d %-3d %-2d %-4d %4d %8d %8d %7d %5lu %-5d %5d ",
 346                            assoc, sk, sctp_sk(sk)->type, sk->sk_state,
 347                            assoc->state, hash, assoc->assoc_id,
 348                            assoc->sndbuf_used,
 349                            atomic_read(&assoc->rmem_alloc),
 350                            sock_i_uid(sk), sock_i_ino(sk),
 351                            epb->bind_addr.port,
 352                            assoc->peer.port);
 353
 354                 seq_printf(seq, " ");
 355                 sctp_seq_dump_local_addrs(seq, epb);
 356                 seq_printf(seq, "<-> ");
 357                 sctp_seq_dump_remote_addrs(seq, assoc);
 358                 seq_printf(seq, "\n");
 359         }
 360         read_unlock(&head->lock);
 361         sctp_local_bh_enable();
 362
 363         return 0;
 364 }
 365
 366 static const struct seq_operations sctp_assoc_ops = {
 367         .start = sctp_assocs_seq_start,
 368         .next  = sctp_assocs_seq_next,
 369         .stop  = sctp_assocs_seq_stop,
 370         .show  = sctp_assocs_seq_show,
 371 };
 372
 373 /* Initialize the seq file operations for 'assocs' object. */
 374 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
 375 {
 376         return seq_open(file, &sctp_assoc_ops);
 377 }
 378
 379 static const struct file_operations sctp_assocs_seq_fops = {
 380         .open    = sctp_assocs_seq_open,
 381         .read    = seq_read,
 382         .llseek  = seq_lseek,
 383         .release = seq_release,
 384 };
 385
 386 /* Set up the proc fs entry for 'assocs' object. */
 387 int __init sctp_assocs_proc_init(void)
 388 {
 389         struct proc_dir_entry *p;
 390
 391         p = create_proc_entry("assocs", S_IRUGO, proc_net_sctp);
 392         if (!p)
 393                 return -ENOMEM;
 394
 395         p->proc_fops = &sctp_assocs_seq_fops;
 396
 397         return 0;
 398 }
 399
 400 /* Cleanup the proc fs entry for 'assocs' object. */
 401 void sctp_assocs_proc_exit(void)
 402 {
 403         remove_proc_entry("assocs", proc_net_sctp);
 404 }