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 char *sctp_snmp_list[] = {
  43 #define SCTP_SNMP_ENTRY(x) #x
  44         SCTP_SNMP_ENTRY(SctpCurrEstab),
  45         SCTP_SNMP_ENTRY(SctpActiveEstabs),
  46         SCTP_SNMP_ENTRY(SctpPassiveEstabs),
  47         SCTP_SNMP_ENTRY(SctpAborteds),
  48         SCTP_SNMP_ENTRY(SctpShutdowns),
  49         SCTP_SNMP_ENTRY(SctpOutOfBlues),
  50         SCTP_SNMP_ENTRY(SctpChecksumErrors),
  51         SCTP_SNMP_ENTRY(SctpOutCtrlChunks),
  52         SCTP_SNMP_ENTRY(SctpOutOrderChunks),
  53         SCTP_SNMP_ENTRY(SctpOutUnorderChunks),
  54         SCTP_SNMP_ENTRY(SctpInCtrlChunks),
  55         SCTP_SNMP_ENTRY(SctpInOrderChunks),
  56         SCTP_SNMP_ENTRY(SctpInUnorderChunks),
  57         SCTP_SNMP_ENTRY(SctpFragUsrMsgs),
  58         SCTP_SNMP_ENTRY(SctpReasmUsrMsgs),
  59         SCTP_SNMP_ENTRY(SctpOutSCTPPacks),
  60         SCTP_SNMP_ENTRY(SctpInSCTPPacks),
  61 #undef SCTP_SNMP_ENTRY
  62 };
  63
  64 /* Return the current value of a particular entry in the mib by adding its
  65  * per cpu counters.
  66  */
  67 static unsigned long
  68 fold_field(void *mib[], int nr)
  69 {
  70         unsigned long res = 0;
  71         int i;
  72
  73         for (i = 0; i < NR_CPUS; i++) {
  74                 if (!cpu_possible(i))
  75                         continue;
  76                 res +=
  77                     *((unsigned long *) (((void *) per_cpu_ptr(mib[0], i)) +
  78                                          sizeof (unsigned long) * nr));
  79                 res +=
  80                     *((unsigned long *) (((void *) per_cpu_ptr(mib[1], i)) +
  81                                          sizeof (unsigned long) * nr));
  82         }
  83         return res;
  84 }
  85
  86 /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
  87 static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
  88 {
  89         int i;
  90
  91         for (i = 0; i < sizeof(sctp_snmp_list) / sizeof(char *); i++)
  92                 seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i],
  93                            fold_field((void **)sctp_statistics, i));
  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_sockaddr_entry *laddr;
 137         union sctp_addr *addr;
 138         struct sctp_af *af;
 139
 140         list_for_each(pos, &epb->bind_addr.address_list) {
 141                 laddr = list_entry(pos, struct sctp_sockaddr_entry, list);
 142                 addr = (union sctp_addr *)&laddr->a;
 143                 af = sctp_get_af_specific(addr->sa.sa_family);
 144                 af->seq_dump_addr(seq, addr);
 145         }
 146 }
 147
 148 /* Dump remote addresses of an association. */
 149 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
 150 {
 151         struct list_head *pos;
 152         struct sctp_transport *transport;
 153         union sctp_addr *addr;
 154         struct sctp_af *af;
 155
 156         list_for_each(pos, &assoc->peer.transport_addr_list) {
 157                 transport = list_entry(pos, struct sctp_transport, transports);
 158                 addr = (union sctp_addr *)&transport->ipaddr;
 159                 af = sctp_get_af_specific(addr->sa.sa_family);
 160                 af->seq_dump_addr(seq, addr);
 161         }
 162 }
 163
 164 /* Display sctp endpoints (/proc/net/sctp/eps). */
 165 static int sctp_eps_seq_show(struct seq_file *seq, void *v)
 166 {
 167         struct sctp_hashbucket *head;
 168         struct sctp_ep_common *epb;
 169         struct sctp_endpoint *ep;
 170         struct sock *sk;
 171         int hash;
 172
 173         seq_printf(seq, " ENDPT     SOCK   STY SST HBKT LPORT LADDRS\n");
 174         for (hash = 0; hash < sctp_ep_hashsize; hash++) {
 175                 head = &sctp_ep_hashbucket[hash];
 176                 read_lock(&head->lock);
 177                 for (epb = head->chain; epb; epb = epb->next) {
 178                         ep = sctp_ep(epb);
 179                         sk = epb->sk;
 180                         seq_printf(seq, "%8p %8p %-3d %-3d %-4d %-5d ", ep, sk,
 181                                    sctp_sk(sk)->type, sk->sk_state, hash,
 182                                    epb->bind_addr.port);
 183                         sctp_seq_dump_local_addrs(seq, epb);
 184                         seq_printf(seq, "\n");
 185                 }
 186                 read_unlock(&head->lock);
 187         }
 188
 189         return 0;
 190 }
 191
 192 /* Initialize the seq file operations for 'eps' object. */
 193 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
 194 {
 195         return single_open(file, sctp_eps_seq_show, NULL);
 196 }
 197
 198 static struct file_operations sctp_eps_seq_fops = {
 199         .open    = sctp_eps_seq_open,
 200         .read    = seq_read,
 201         .llseek  = seq_lseek,
 202         .release = single_release,
 203 };
 204
 205 /* Set up the proc fs entry for 'eps' object. */
 206 int __init sctp_eps_proc_init(void)
 207 {
 208         struct proc_dir_entry *p;
 209
 210         p = create_proc_entry("eps", S_IRUGO, proc_net_sctp);
 211         if (!p)
 212                 return -ENOMEM;
 213
 214         p->proc_fops = &sctp_eps_seq_fops;
 215
 216         return 0;
 217 }
 218
 219 /* Cleanup the proc fs entry for 'eps' object. */
 220 void sctp_eps_proc_exit(void)
 221 {
 222         remove_proc_entry("eps", proc_net_sctp);
 223 }
 224
 225 /* Display sctp associations (/proc/net/sctp/assocs). */
 226 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
 227 {
 228         struct sctp_hashbucket *head;
 229         struct sctp_ep_common *epb;
 230         struct sctp_association *assoc;
 231         struct sock *sk;
 232         int hash;
 233
 234         seq_printf(seq, " ASSOC     SOCK   STY SST ST HBKT LPORT RPORT "
 235                         "LADDRS <-> RADDRS\n");
 236         for (hash = 0; hash < sctp_assoc_hashsize; hash++) {
 237                 head = &sctp_assoc_hashbucket[hash];
 238                 read_lock(&head->lock);
 239                 for (epb = head->chain; epb; epb = epb->next) {
 240                         assoc = sctp_assoc(epb);
 241                         sk = epb->sk;
 242                         seq_printf(seq,
 243                                    "%8p %8p %-3d %-3d %-2d %-4d %-5d %-5d ",
 244                                    assoc, sk, sctp_sk(sk)->type, sk->sk_state,
 245                                    assoc->state, hash, epb->bind_addr.port,
 246                                    assoc->peer.port);
 247                         sctp_seq_dump_local_addrs(seq, epb);
 248                         seq_printf(seq, "<-> ");
 249                         sctp_seq_dump_remote_addrs(seq, assoc);
 250                         seq_printf(seq, "\n");
 251                 }
 252                 read_unlock(&head->lock);
 253         }
 254
 255         return 0;
 256 }
 257
 258 /* Initialize the seq file operations for 'assocs' object. */
 259 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
 260 {
 261         return single_open(file, sctp_assocs_seq_show, NULL);
 262 }
 263
 264 static struct file_operations sctp_assocs_seq_fops = {
 265         .open    = sctp_assocs_seq_open,
 266         .read    = seq_read,
 267         .llseek  = seq_lseek,
 268         .release = single_release,
 269 };
 270
 271 /* Set up the proc fs entry for 'assocs' object. */
 272 int __init sctp_assocs_proc_init(void)
 273 {
 274         struct proc_dir_entry *p;
 275
 276         p = create_proc_entry("assocs", S_IRUGO, proc_net_sctp);
 277         if (!p)
 278                 return -ENOMEM;
 279
 280         p->proc_fops = &sctp_assocs_seq_fops;
 281
 282         return 0;
 283 }
 284
 285 /* Cleanup the proc fs entry for 'assocs' object. */
 286 void sctp_assocs_proc_exit(void)
 287 {
 288         remove_proc_entry("assocs", proc_net_sctp);
 289 }