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_sockaddr_entry *laddr;
 136         union sctp_addr *addr;
 137         struct sctp_af *af;
 138
 139         list_for_each(pos, &epb->bind_addr.address_list) {
 140                 laddr = list_entry(pos, struct sctp_sockaddr_entry, list);
 141                 addr = (union sctp_addr *)&laddr->a;
 142                 af = sctp_get_af_specific(addr->sa.sa_family);
 143                 af->seq_dump_addr(seq, addr);
 144         }
 145 }
 146
 147 /* Dump remote addresses of an association. */
 148 static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
 149 {
 150         struct list_head *pos;
 151         struct sctp_transport *transport;
 152         union sctp_addr *addr;
 153         struct sctp_af *af;
 154
 155         list_for_each(pos, &assoc->peer.transport_addr_list) {
 156                 transport = list_entry(pos, struct sctp_transport, transports);
 157                 addr = (union sctp_addr *)&transport->ipaddr;
 158                 af = sctp_get_af_specific(addr->sa.sa_family);
 159                 af->seq_dump_addr(seq, addr);
 160         }
 161 }
 162
 163 /* Display sctp endpoints (/proc/net/sctp/eps). */
 164 static int sctp_eps_seq_show(struct seq_file *seq, void *v)
 165 {
 166         struct sctp_hashbucket *head;
 167         struct sctp_ep_common *epb;
 168         struct sctp_endpoint *ep;
 169         struct sock *sk;
 170         int hash;
 171
 172         seq_printf(seq, " ENDPT     SOCK   STY SST HBKT LPORT LADDRS\n");
 173         for (hash = 0; hash < sctp_ep_hashsize; hash++) {
 174                 head = &sctp_ep_hashtable[hash];
 175                 read_lock(&head->lock);
 176                 for (epb = head->chain; epb; epb = epb->next) {
 177                         ep = sctp_ep(epb);
 178                         sk = epb->sk;
 179                         seq_printf(seq, "%8p %8p %-3d %-3d %-4d %-5d ", ep, sk,
 180                                    sctp_sk(sk)->type, sk->sk_state, hash,
 181                                    epb->bind_addr.port);
 182                         sctp_seq_dump_local_addrs(seq, epb);
 183                         seq_printf(seq, "\n");
 184                 }
 185                 read_unlock(&head->lock);
 186         }
 187
 188         return 0;
 189 }
 190
 191 /* Initialize the seq file operations for 'eps' object. */
 192 static int sctp_eps_seq_open(struct inode *inode, struct file *file)
 193 {
 194         return single_open(file, sctp_eps_seq_show, NULL);
 195 }
 196
 197 static struct file_operations sctp_eps_seq_fops = {
 198         .open    = sctp_eps_seq_open,
 199         .read    = seq_read,
 200         .llseek  = seq_lseek,
 201         .release = single_release,
 202 };
 203
 204 /* Set up the proc fs entry for 'eps' object. */
 205 int __init sctp_eps_proc_init(void)
 206 {
 207         struct proc_dir_entry *p;
 208
 209         p = create_proc_entry("eps", S_IRUGO, proc_net_sctp);
 210         if (!p)
 211                 return -ENOMEM;
 212
 213         p->proc_fops = &sctp_eps_seq_fops;
 214
 215         return 0;
 216 }
 217
 218 /* Cleanup the proc fs entry for 'eps' object. */
 219 void sctp_eps_proc_exit(void)
 220 {
 221         remove_proc_entry("eps", proc_net_sctp);
 222 }
 223
 224 /* Display sctp associations (/proc/net/sctp/assocs). */
 225 static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
 226 {
 227         struct sctp_hashbucket *head;
 228         struct sctp_ep_common *epb;
 229         struct sctp_association *assoc;
 230         struct sock *sk;
 231         int hash;
 232
 233         seq_printf(seq, " ASSOC     SOCK   STY SST ST HBKT LPORT RPORT "
 234                         "LADDRS <-> RADDRS\n");
 235         for (hash = 0; hash < sctp_assoc_hashsize; hash++) {
 236                 head = &sctp_assoc_hashtable[hash];
 237                 read_lock(&head->lock);
 238                 for (epb = head->chain; epb; epb = epb->next) {
 239                         assoc = sctp_assoc(epb);
 240                         sk = epb->sk;
 241                         seq_printf(seq,
 242                                    "%8p %8p %-3d %-3d %-2d %-4d %-5d %-5d ",
 243                                    assoc, sk, sctp_sk(sk)->type, sk->sk_state,
 244                                    assoc->state, hash, epb->bind_addr.port,
 245                                    assoc->peer.port);
 246                         sctp_seq_dump_local_addrs(seq, epb);
 247                         seq_printf(seq, "<-> ");
 248                         sctp_seq_dump_remote_addrs(seq, assoc);
 249                         seq_printf(seq, "\n");
 250                 }
 251                 read_unlock(&head->lock);
 252         }
 253
 254         return 0;
 255 }
 256
 257 /* Initialize the seq file operations for 'assocs' object. */
 258 static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
 259 {
 260         return single_open(file, sctp_assocs_seq_show, NULL);
 261 }
 262
 263 static struct file_operations sctp_assocs_seq_fops = {
 264         .open    = sctp_assocs_seq_open,
 265         .read    = seq_read,
 266         .llseek  = seq_lseek,
 267         .release = single_release,
 268 };
 269
 270 /* Set up the proc fs entry for 'assocs' object. */
 271 int __init sctp_assocs_proc_init(void)
 272 {
 273         struct proc_dir_entry *p;
 274
 275         p = create_proc_entry("assocs", S_IRUGO, proc_net_sctp);
 276         if (!p)
 277                 return -ENOMEM;
 278
 279         p->proc_fops = &sctp_assocs_seq_fops;
 280
 281         return 0;
 282 }
 283
 284 /* Cleanup the proc fs entry for 'assocs' object. */
 285 void sctp_assocs_proc_exit(void)
 286 {
 287         remove_proc_entry("assocs", proc_net_sctp);
 288 }