net/ipv6/proc.c

   1 /*
   2  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   3  *              operating system.  INET is implemented using the  BSD Socket
   4  *              interface as the means of communication with the user level.
   5  *
   6  *              This file implements the various access functions for the
   7  *              PROC file system.  This is very similar to the IPv4 version,
   8  *              except it reports the sockets in the INET6 address family.
   9  *
  10  * Version:     $Id: proc.c,v 1.17 2002/02/01 22:01:04 davem Exp $
  11  *
  12  * Authors:     David S. Miller (davem@caip.rutgers.edu)
  13  *              YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
  14  *
  15  *              This program is free software; you can redistribute it and/or
  16  *              modify it under the terms of the GNU General Public License
  17  *              as published by the Free Software Foundation; either version
  18  *              2 of the License, or (at your option) any later version.
  19  */
  20 #include <linux/socket.h>
  21 #include <linux/net.h>
  22 #include <linux/ipv6.h>
  23 #include <linux/proc_fs.h>
  24 #include <linux/seq_file.h>
  25 #include <linux/stddef.h>
  26 #include <net/net_namespace.h>
  27 #include <net/ip.h>
  28 #include <net/sock.h>
  29 #include <net/tcp.h>
  30 #include <net/udp.h>
  31 #include <net/transp_v6.h>
  32 #include <net/ipv6.h>
  33
  34 static struct proc_dir_entry *proc_net_devsnmp6;
  35
  36 static int sockstat6_seq_show(struct seq_file *seq, void *v)
  37 {
  38         struct net *net = seq->private;
  39
  40         seq_printf(seq, "TCP6: inuse %d\n",
  41                        sock_prot_inuse_get(net, &tcpv6_prot));
  42         seq_printf(seq, "UDP6: inuse %d\n",
  43                        sock_prot_inuse_get(net, &udpv6_prot));
  44         seq_printf(seq, "UDPLITE6: inuse %d\n",
  45                         sock_prot_inuse_get(net, &udplitev6_prot));
  46         seq_printf(seq, "RAW6: inuse %d\n",
  47                        sock_prot_inuse_get(net, &rawv6_prot));
  48         seq_printf(seq, "FRAG6: inuse %d memory %d\n",
  49                        ip6_frag_nqueues(net), ip6_frag_mem(net));
  50         return 0;
  51 }
  52
  53 static struct snmp_mib snmp6_ipstats_list[] = {
  54 /* ipv6 mib according to RFC 2465 */
  55         SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES),
  56         SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
  57         SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
  58         SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
  59         SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
  60         SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
  61         SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
  62         SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
  63         SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
  64         SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
  65         SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS),
  66         SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
  67         SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
  68         SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
  69         SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
  70         SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
  71         SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
  72         SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
  73         SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
  74         SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
  75         SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
  76         SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
  77         SNMP_MIB_SENTINEL
  78 };
  79
  80 static struct snmp_mib snmp6_icmp6_list[] = {
  81 /* icmpv6 mib according to RFC 2466 */
  82         SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
  83         SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
  84         SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
  85         SNMP_MIB_SENTINEL
  86 };
  87
  88 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
  89 static char *icmp6type2name[256] = {
  90         [ICMPV6_DEST_UNREACH] = "DestUnreachs",
  91         [ICMPV6_PKT_TOOBIG] = "PktTooBigs",
  92         [ICMPV6_TIME_EXCEED] = "TimeExcds",
  93         [ICMPV6_PARAMPROB] = "ParmProblems",
  94         [ICMPV6_ECHO_REQUEST] = "Echos",
  95         [ICMPV6_ECHO_REPLY] = "EchoReplies",
  96         [ICMPV6_MGM_QUERY] = "GroupMembQueries",
  97         [ICMPV6_MGM_REPORT] = "GroupMembResponses",
  98         [ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
  99         [ICMPV6_MLD2_REPORT] = "MLDv2Reports",
 100         [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
 101         [NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
 102         [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
 103         [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
 104         [NDISC_REDIRECT] = "Redirects",
 105 };
 106
 107
 108 static struct snmp_mib snmp6_udp6_list[] = {
 109         SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
 110         SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
 111         SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
 112         SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 113         SNMP_MIB_SENTINEL
 114 };
 115
 116 static struct snmp_mib snmp6_udplite6_list[] = {
 117         SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
 118         SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
 119         SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
 120         SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 121         SNMP_MIB_SENTINEL
 122 };
 123
 124 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void **mib)
 125 {
 126         static char name[32];
 127         int i;
 128
 129         /* print by name -- deprecated items */
 130         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 131                 int icmptype;
 132                 char *p;
 133
 134                 icmptype = i & 0xff;
 135                 p = icmp6type2name[icmptype];
 136                 if (!p) /* don't print un-named types here */
 137                         continue;
 138                 (void) snprintf(name, sizeof(name)-1, "Icmp6%s%s",
 139                         i & 0x100 ? "Out" : "In", p);
 140                 seq_printf(seq, "%-32s\t%lu\n", name,
 141                         snmp_fold_field(mib, i));
 142         }
 143
 144         /* print by number (nonzero only) - ICMPMsgStat format */
 145         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 146                 unsigned long val;
 147
 148                 val = snmp_fold_field(mib, i);
 149                 if (!val)
 150                         continue;
 151                 (void) snprintf(name, sizeof(name)-1, "Icmp6%sType%u",
 152                         i & 0x100 ?  "Out" : "In", i & 0xff);
 153                 seq_printf(seq, "%-32s\t%lu\n", name, val);
 154         }
 155         return;
 156 }
 157
 158 static inline void
 159 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
 160 {
 161         int i;
 162         for (i=0; itemlist[i].name; i++)
 163                 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
 164                            snmp_fold_field(mib, itemlist[i].entry));
 165 }
 166
 167 static int snmp6_seq_show(struct seq_file *seq, void *v)
 168 {
 169         struct inet6_dev *idev = (struct inet6_dev *)seq->private;
 170
 171         if (idev) {
 172                 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
 173                 snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list);
 174                 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
 175                 snmp6_seq_show_icmpv6msg(seq, (void **)idev->stats.icmpv6msg);
 176         } else {
 177                 snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list);
 178                 snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list);
 179                 snmp6_seq_show_icmpv6msg(seq, (void **)icmpv6msg_statistics);
 180                 snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list);
 181                 snmp6_seq_show_item(seq, (void **)udplite_stats_in6, snmp6_udplite6_list);
 182         }
 183         return 0;
 184 }
 185
 186 static int sockstat6_seq_open(struct inode *inode, struct file *file)
 187 {
 188         int err;
 189         struct net *net;
 190
 191         err = -ENXIO;
 192         net = get_proc_net(inode);
 193         if (net == NULL)
 194                 goto err_net;
 195
 196         err = single_open(file, sockstat6_seq_show, net);
 197         if (err < 0)
 198                 goto err_open;
 199
 200         return 0;
 201
 202 err_open:
 203         put_net(net);
 204 err_net:
 205         return err;
 206 }
 207
 208 static int sockstat6_seq_release(struct inode *inode, struct file *file)
 209 {
 210         struct net *net = ((struct seq_file *)file->private_data)->private;
 211
 212         put_net(net);
 213         return single_release(inode, file);
 214 }
 215
 216 static const struct file_operations sockstat6_seq_fops = {
 217         .owner   = THIS_MODULE,
 218         .open    = sockstat6_seq_open,
 219         .read    = seq_read,
 220         .llseek  = seq_lseek,
 221         .release = sockstat6_seq_release,
 222 };
 223
 224 static int snmp6_seq_open(struct inode *inode, struct file *file)
 225 {
 226         return single_open(file, snmp6_seq_show, PDE(inode)->data);
 227 }
 228
 229 static const struct file_operations snmp6_seq_fops = {
 230         .owner   = THIS_MODULE,
 231         .open    = snmp6_seq_open,
 232         .read    = seq_read,
 233         .llseek  = seq_lseek,
 234         .release = single_release,
 235 };
 236
 237 int snmp6_register_dev(struct inet6_dev *idev)
 238 {
 239         struct proc_dir_entry *p;
 240
 241         if (!idev || !idev->dev)
 242                 return -EINVAL;
 243
 244         if (dev_net(idev->dev) != &init_net)
 245                 return 0;
 246
 247         if (!proc_net_devsnmp6)
 248                 return -ENOENT;
 249
 250         p = proc_create(idev->dev->name, S_IRUGO,
 251                         proc_net_devsnmp6, &snmp6_seq_fops);
 252         if (!p)
 253                 return -ENOMEM;
 254
 255         p->data = idev;
 256
 257         idev->stats.proc_dir_entry = p;
 258         return 0;
 259 }
 260
 261 int snmp6_unregister_dev(struct inet6_dev *idev)
 262 {
 263         if (!proc_net_devsnmp6)
 264                 return -ENOENT;
 265         if (!idev || !idev->stats.proc_dir_entry)
 266                 return -EINVAL;
 267         remove_proc_entry(idev->stats.proc_dir_entry->name,
 268                           proc_net_devsnmp6);
 269         idev->stats.proc_dir_entry = NULL;
 270         return 0;
 271 }
 272
 273 static int ipv6_proc_init_net(struct net *net)
 274 {
 275         if (!proc_net_fops_create(net, "sockstat6", S_IRUGO,
 276                         &sockstat6_seq_fops))
 277                 return -ENOMEM;
 278         return 0;
 279 }
 280
 281 static void ipv6_proc_exit_net(struct net *net)
 282 {
 283         proc_net_remove(net, "sockstat6");
 284 }
 285
 286 static struct pernet_operations ipv6_proc_ops = {
 287         .init = ipv6_proc_init_net,
 288         .exit = ipv6_proc_exit_net,
 289 };
 290
 291 int __init ipv6_misc_proc_init(void)
 292 {
 293         int rc = 0;
 294
 295         if (register_pernet_subsys(&ipv6_proc_ops))
 296                 goto proc_net_fail;
 297
 298         if (!proc_net_fops_create(&init_net, "snmp6", S_IRUGO, &snmp6_seq_fops))
 299                 goto proc_snmp6_fail;
 300
 301         proc_net_devsnmp6 = proc_mkdir("dev_snmp6", init_net.proc_net);
 302         if (!proc_net_devsnmp6)
 303                 goto proc_dev_snmp6_fail;
 304 out:
 305         return rc;
 306
 307 proc_dev_snmp6_fail:
 308         proc_net_remove(&init_net, "snmp6");
 309 proc_snmp6_fail:
 310         unregister_pernet_subsys(&ipv6_proc_ops);
 311 proc_net_fail:
 312         rc = -ENOMEM;
 313         goto out;
 314 }
 315
 316 void ipv6_misc_proc_exit(void)
 317 {
 318         proc_net_remove(&init_net, "sockstat6");
 319         proc_net_remove(&init_net, "dev_snmp6");
 320         proc_net_remove(&init_net, "snmp6");
 321         unregister_pernet_subsys(&ipv6_proc_ops);
 322 }
 323