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 #include <net/ip.h> /* for snmp_fold_field */
  42
  43 static struct snmp_mib sctp_snmp_list[] = {
  44         SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB),
  45         SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS),
  46         SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS),
  47         SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS),
  48         SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS),
  49         SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES),
  50         SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS),
  51         SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS),
  52         SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS),
  53         SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS),
  54         SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS),
  55         SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS),
  56         SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS),
  57         SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS),
  58         SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS),
  59         SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS),
  60         SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS),
  61         SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
  62         SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
  63         SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
  64         SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
  65         SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
  66         SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
  67         SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
  68         SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
  69         SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
  70         SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
  71         SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
  72         SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
  73         SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
  74         SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
  75         SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
  76         SNMP_MIB_SENTINEL
  77 };
  78
  79 /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
  80 static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
  81 {
  82         int i;
  83
  84         for (i = 0; sctp_snmp_list[i].name != NULL; i++)
  85                 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
  86                            snmp_fold_field((void **)sctp_statistics,
  87                                       sctp_snmp_list[i].entry));
  88
  89         return 0;
  90 }
  91
  92 /* Initialize the seq file operations for 'snmp' object. */
  93 static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
  94 {
  95         return single_open(file, sctp_snmp_seq_show, NULL);
  96 }
  97
  98 static const struct file_operations sctp_snmp_seq_fops = {
  99         .owner   = THIS_MODULE,
 100         .open    = sctp_snmp_seq_open,
 101         .read    = seq_read,
 102         .llseek  = seq_lseek,
 103         .release = single_release,
 104 };
 105
 106 /* Set up the proc fs entry for 'snmp' object. */
 107 int __init sctp_snmp_proc_init(void)
 108 {
 109         struct proc_dir_entry *p;
 110
 111         p = proc_create("snmp", S_IRUGO, proc_net_sctp, &sctp_snmp_seq_fops);
 112         if (!p)
 113                 return -ENOMEM;
 114
 115         return 0;
 116 }
 117
 118 /* Cleanup the proc fs entry for 'snmp' object. */
 119 void sctp_snmp_proc_exit(void)
 120 {
 121         remove_proc_entry("snmp", proc_net_sctp);
 122 }
 123
 124 /* Dump local addresses of an association/endpoint. */
 125 static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
 126 {
 127         struct list_head *pos;
 128         struct sctp_association *asoc;
 129         struct sctp_sockaddr_entry *laddr;
 130         struct sctp_transport *peer;
 131         union sctp_addr *addr, *primary = NULL;
 132         struct sctp_af *af;
 133
 134         if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
 135             asoc = sctp_assoc(epb);
 136             peer = asoc->peer.primary_path;
 137             primary = &peer->saddr;
 138         }
 139
 140         list_for_each(pos, &epb->bind_addr.address_list) {
 141                 laddr = list_entry(pos, struct sctp_sockaddr_entry, list);
 142                 addr = &laddr->a;
 143                 af = sctp_get_af_specific(addr->sa.sa_family);
 144                 if (primary && af->cmp_addr(addr, primary)) {
 145                         seq_printf(seq, "*");
 146                 }
 147                 af->seq_dump_addr(seq, addr);
 148         }
 149 }
 150
 151 /* Dump remote addresses of an association. */
 152 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
 153 {
 154         struct list_head *pos;
 155         struct sctp_transport *transport;
 156         union sctp_addr *addr, *primary;
 157         struct sctp_af *af;
 158
 159         primary = &assoc->peer.primary_addr;
 160         list_for_each(pos, &assoc->peer.transport_addr_list) {
 161                 transport = list_entry(pos, struct sctp_transport, transports);
 162                 addr = &transport->ipaddr;
 163                 af = sctp_get_af_specific(addr->sa.sa_family);
 164                 if (af->cmp_addr(addr, primary)) {
 165                         seq_printf(seq, "*");
 166                 }
 167                 af->seq_dump_addr(seq, addr);
 168         }
 169 }
 170
 171 static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
 172 {
 173         if (*pos >= sctp_ep_hashsize)
 174                 return NULL;
 175
 176         if (*pos < 0)
 177                 *pos = 0;
 178
 179         if (*pos == 0)
 180                 seq_printf(seq, " ENDPT     SOCK   STY SST HBKT LPORT   UID INODE LADDRS\n");
 181
 182         return (void *)pos;
 183 }
 184
 185 static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
 186 {
 187         return;
 188 }
 189
 190
 191 static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 192 {
 193         if (++*pos >= sctp_ep_hashsize)
 194                 return NULL;
 195
 196         return pos;
 197 }
 198
 199
 200 /* Display sctp endpoints (/proc/net/sctp/eps). */
 201 static int sctp_eps_seq_show(struct seq_file *seq, void *v)
 202 {
 203         struct sctp_hashbucket *head;
 204         struct sctp_ep_common *epb;
 205         struct sctp_endpoint *ep;
 206         struct sock *sk;
 207         struct hlist_node *node;
 208         int    hash = *(loff_t *)v;
 209
 210         if (hash >= sctp_ep_hashsize)
 211                 return -ENOMEM;
 212
 213         head = &sctp_ep_hashtable[hash];
 214         sctp_local_bh_disable();
 215         read_lock(&head->lock);
 216         sctp_for_each_hentry(epb, node, &head->chain) {
 217                 ep = sctp_ep(epb);
 218                 sk = epb->sk;
 219                 seq_printf(seq, "%8p %8p %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk,
 220                            sctp_sk(sk)->type, sk->sk_state, hash,
 221                            epb->bind_addr.port,
 222                            sock_i_uid(sk), sock_i_ino(sk));
 223
 224                 sctp_seq_dump_local_addrs(seq, epb);
 225                 seq_printf(seq, "\n");
 226         }
 227         read_unlock(&head->lock);
 228         sctp_local_bh_enable();
 229
 230         return 0;
 231 }
 232
 233 static const struct seq_operations sctp_eps_ops = {
 234         .start = sctp_eps_seq_start,
 235         .next  = sctp_eps_seq_next,
 236         .stop  = sctp_eps_seq_stop,
 237         .show  = sctp_eps_seq_show,
 238 };
 239
 240
 241 /* Initialize the seq file operations for 'eps' object. */
 242 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
 243 {
 244         return seq_open(file, &sctp_eps_ops);
 245 }
 246
 247 static const struct file_operations sctp_eps_seq_fops = {
 248         .open    = sctp_eps_seq_open,
 249         .read    = seq_read,
 250         .llseek  = seq_lseek,
 251         .release = seq_release,
 252 };
 253
 254 /* Set up the proc fs entry for 'eps' object. */
 255 int __init sctp_eps_proc_init(void)
 256 {
 257         struct proc_dir_entry *p;
 258
 259         p = proc_create("eps", S_IRUGO, proc_net_sctp, &sctp_eps_seq_fops);
 260         if (!p)
 261                 return -ENOMEM;
 262
 263         return 0;
 264 }
 265
 266 /* Cleanup the proc fs entry for 'eps' object. */
 267 void sctp_eps_proc_exit(void)
 268 {
 269         remove_proc_entry("eps", proc_net_sctp);
 270 }
 271
 272
 273 static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
 274 {
 275         if (*pos >= sctp_assoc_hashsize)
 276                 return NULL;
 277
 278         if (*pos < 0)
 279                 *pos = 0;
 280
 281         if (*pos == 0)
 282                 seq_printf(seq, " ASSOC     SOCK   STY SST ST HBKT ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
 283                                 "RPORT LADDRS <-> RADDRS\n");
 284
 285         return (void *)pos;
 286 }
 287
 288 static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
 289 {
 290         return;
 291 }
 292
 293
 294 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 295 {
 296         if (++*pos >= sctp_assoc_hashsize)
 297                 return NULL;
 298
 299         return pos;
 300 }
 301
 302 /* Display sctp associations (/proc/net/sctp/assocs). */
 303 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
 304 {
 305         struct sctp_hashbucket *head;
 306         struct sctp_ep_common *epb;
 307         struct sctp_association *assoc;
 308         struct sock *sk;
 309         struct hlist_node *node;
 310         int    hash = *(loff_t *)v;
 311
 312         if (hash >= sctp_assoc_hashsize)
 313                 return -ENOMEM;
 314
 315         head = &sctp_assoc_hashtable[hash];
 316         sctp_local_bh_disable();
 317         read_lock(&head->lock);
 318         sctp_for_each_hentry(epb, node, &head->chain) {
 319                 assoc = sctp_assoc(epb);
 320                 sk = epb->sk;
 321                 seq_printf(seq,
 322                            "%8p %8p %-3d %-3d %-2d %-4d %4d %8d %8d %7d %5lu %-5d %5d ",
 323                            assoc, sk, sctp_sk(sk)->type, sk->sk_state,
 324                            assoc->state, hash, assoc->assoc_id,
 325                            assoc->sndbuf_used,
 326                            atomic_read(&assoc->rmem_alloc),
 327                            sock_i_uid(sk), sock_i_ino(sk),
 328                            epb->bind_addr.port,
 329                            assoc->peer.port);
 330
 331                 seq_printf(seq, " ");
 332                 sctp_seq_dump_local_addrs(seq, epb);
 333                 seq_printf(seq, "<-> ");
 334                 sctp_seq_dump_remote_addrs(seq, assoc);
 335                 seq_printf(seq, "\n");
 336         }
 337         read_unlock(&head->lock);
 338         sctp_local_bh_enable();
 339
 340         return 0;
 341 }
 342
 343 static const struct seq_operations sctp_assoc_ops = {
 344         .start = sctp_assocs_seq_start,
 345         .next  = sctp_assocs_seq_next,
 346         .stop  = sctp_assocs_seq_stop,
 347         .show  = sctp_assocs_seq_show,
 348 };
 349
 350 /* Initialize the seq file operations for 'assocs' object. */
 351 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
 352 {
 353         return seq_open(file, &sctp_assoc_ops);
 354 }
 355
 356 static const struct file_operations sctp_assocs_seq_fops = {
 357         .open    = sctp_assocs_seq_open,
 358         .read    = seq_read,
 359         .llseek  = seq_lseek,
 360         .release = seq_release,
 361 };
 362
 363 /* Set up the proc fs entry for 'assocs' object. */
 364 int __init sctp_assocs_proc_init(void)
 365 {
 366         struct proc_dir_entry *p;
 367
 368         p = proc_create("assocs", S_IRUGO, proc_net_sctp,
 369                         &sctp_assocs_seq_fops);
 370         if (!p)
 371                 return -ENOMEM;
 372
 373         return 0;
 374 }
 375
 376 /* Cleanup the proc fs entry for 'assocs' object. */
 377 void sctp_assocs_proc_exit(void)
 378 {
 379         remove_proc_entry("assocs", proc_net_sctp);
 380 }