linux/net/ipv6/proc.c
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   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 * Authors:     David S. Miller (davem@caip.rutgers.edu)
  11 *              YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
  12 *
  13 *              This program is free software; you can redistribute it and/or
  14 *              modify it under the terms of the GNU General Public License
  15 *              as published by the Free Software Foundation; either version
  16 *              2 of the License, or (at your option) any later version.
  17 */
  18#include <linux/socket.h>
  19#include <linux/net.h>
  20#include <linux/ipv6.h>
  21#include <linux/proc_fs.h>
  22#include <linux/seq_file.h>
  23#include <linux/stddef.h>
  24#include <net/net_namespace.h>
  25#include <net/ip.h>
  26#include <net/sock.h>
  27#include <net/tcp.h>
  28#include <net/udp.h>
  29#include <net/transp_v6.h>
  30#include <net/ipv6.h>
  31
  32static int sockstat6_seq_show(struct seq_file *seq, void *v)
  33{
  34        struct net *net = seq->private;
  35
  36        seq_printf(seq, "TCP6: inuse %d\n",
  37                       sock_prot_inuse_get(net, &tcpv6_prot));
  38        seq_printf(seq, "UDP6: inuse %d\n",
  39                       sock_prot_inuse_get(net, &udpv6_prot));
  40        seq_printf(seq, "UDPLITE6: inuse %d\n",
  41                        sock_prot_inuse_get(net, &udplitev6_prot));
  42        seq_printf(seq, "RAW6: inuse %d\n",
  43                       sock_prot_inuse_get(net, &rawv6_prot));
  44        seq_printf(seq, "FRAG6: inuse %d memory %d\n",
  45                       ip6_frag_nqueues(net), ip6_frag_mem(net));
  46        return 0;
  47}
  48
  49static int sockstat6_seq_open(struct inode *inode, struct file *file)
  50{
  51        return single_open_net(inode, file, sockstat6_seq_show);
  52}
  53
  54static const struct file_operations sockstat6_seq_fops = {
  55        .owner   = THIS_MODULE,
  56        .open    = sockstat6_seq_open,
  57        .read    = seq_read,
  58        .llseek  = seq_lseek,
  59        .release = single_release_net,
  60};
  61
  62static struct snmp_mib snmp6_ipstats_list[] = {
  63/* ipv6 mib according to RFC 2465 */
  64        SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES),
  65        SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
  66        SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
  67        SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
  68        SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
  69        SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
  70        SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
  71        SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
  72        SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
  73        SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
  74        SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS),
  75        SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
  76        SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
  77        SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
  78        SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
  79        SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
  80        SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
  81        SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
  82        SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
  83        SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
  84        SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
  85        SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
  86        SNMP_MIB_SENTINEL
  87};
  88
  89static struct snmp_mib snmp6_icmp6_list[] = {
  90/* icmpv6 mib according to RFC 2466 */
  91        SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
  92        SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
  93        SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
  94        SNMP_MIB_SENTINEL
  95};
  96
  97/* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
  98static char *icmp6type2name[256] = {
  99        [ICMPV6_DEST_UNREACH] = "DestUnreachs",
 100        [ICMPV6_PKT_TOOBIG] = "PktTooBigs",
 101        [ICMPV6_TIME_EXCEED] = "TimeExcds",
 102        [ICMPV6_PARAMPROB] = "ParmProblems",
 103        [ICMPV6_ECHO_REQUEST] = "Echos",
 104        [ICMPV6_ECHO_REPLY] = "EchoReplies",
 105        [ICMPV6_MGM_QUERY] = "GroupMembQueries",
 106        [ICMPV6_MGM_REPORT] = "GroupMembResponses",
 107        [ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
 108        [ICMPV6_MLD2_REPORT] = "MLDv2Reports",
 109        [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
 110        [NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
 111        [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
 112        [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
 113        [NDISC_REDIRECT] = "Redirects",
 114};
 115
 116
 117static struct snmp_mib snmp6_udp6_list[] = {
 118        SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
 119        SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
 120        SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
 121        SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 122        SNMP_MIB_SENTINEL
 123};
 124
 125static struct snmp_mib snmp6_udplite6_list[] = {
 126        SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
 127        SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
 128        SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
 129        SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 130        SNMP_MIB_SENTINEL
 131};
 132
 133static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void **mib)
 134{
 135        char name[32];
 136        int i;
 137
 138        /* print by name -- deprecated items */
 139        for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 140                int icmptype;
 141                char *p;
 142
 143                icmptype = i & 0xff;
 144                p = icmp6type2name[icmptype];
 145                if (!p) /* don't print un-named types here */
 146                        continue;
 147                snprintf(name, sizeof(name), "Icmp6%s%s",
 148                        i & 0x100 ? "Out" : "In", p);
 149                seq_printf(seq, "%-32s\t%lu\n", name,
 150                        snmp_fold_field(mib, i));
 151        }
 152
 153        /* print by number (nonzero only) - ICMPMsgStat format */
 154        for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 155                unsigned long val;
 156
 157                val = snmp_fold_field(mib, i);
 158                if (!val)
 159                        continue;
 160                snprintf(name, sizeof(name), "Icmp6%sType%u",
 161                        i & 0x100 ?  "Out" : "In", i & 0xff);
 162                seq_printf(seq, "%-32s\t%lu\n", name, val);
 163        }
 164        return;
 165}
 166
 167static inline void
 168snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
 169{
 170        int i;
 171        for (i=0; itemlist[i].name; i++)
 172                seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
 173                           snmp_fold_field(mib, itemlist[i].entry));
 174}
 175
 176static int snmp6_seq_show(struct seq_file *seq, void *v)
 177{
 178        struct net *net = (struct net *)seq->private;
 179
 180        snmp6_seq_show_item(seq, (void **)net->mib.ipv6_statistics,
 181                            snmp6_ipstats_list);
 182        snmp6_seq_show_item(seq, (void **)net->mib.icmpv6_statistics,
 183                            snmp6_icmp6_list);
 184        snmp6_seq_show_icmpv6msg(seq, (void **)net->mib.icmpv6msg_statistics);
 185        snmp6_seq_show_item(seq, (void **)net->mib.udp_stats_in6,
 186                            snmp6_udp6_list);
 187        snmp6_seq_show_item(seq, (void **)net->mib.udplite_stats_in6,
 188                            snmp6_udplite6_list);
 189        return 0;
 190}
 191
 192static int snmp6_seq_open(struct inode *inode, struct file *file)
 193{
 194        return single_open_net(inode, file, snmp6_seq_show);
 195}
 196
 197static const struct file_operations snmp6_seq_fops = {
 198        .owner   = THIS_MODULE,
 199        .open    = snmp6_seq_open,
 200        .read    = seq_read,
 201        .llseek  = seq_lseek,
 202        .release = single_release_net,
 203};
 204
 205static int snmp6_dev_seq_show(struct seq_file *seq, void *v)
 206{
 207        struct inet6_dev *idev = (struct inet6_dev *)seq->private;
 208
 209        seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
 210        snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list);
 211        snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
 212        snmp6_seq_show_icmpv6msg(seq, (void **)idev->stats.icmpv6msg);
 213        return 0;
 214}
 215
 216static int snmp6_dev_seq_open(struct inode *inode, struct file *file)
 217{
 218        return single_open(file, snmp6_dev_seq_show, PDE(inode)->data);
 219}
 220
 221static const struct file_operations snmp6_dev_seq_fops = {
 222        .owner   = THIS_MODULE,
 223        .open    = snmp6_dev_seq_open,
 224        .read    = seq_read,
 225        .llseek  = seq_lseek,
 226        .release = single_release,
 227};
 228
 229int snmp6_register_dev(struct inet6_dev *idev)
 230{
 231        struct proc_dir_entry *p;
 232        struct net *net;
 233
 234        if (!idev || !idev->dev)
 235                return -EINVAL;
 236
 237        net = dev_net(idev->dev);
 238        if (!net->mib.proc_net_devsnmp6)
 239                return -ENOENT;
 240
 241        p = proc_create_data(idev->dev->name, S_IRUGO,
 242                             net->mib.proc_net_devsnmp6,
 243                             &snmp6_dev_seq_fops, idev);
 244        if (!p)
 245                return -ENOMEM;
 246
 247        idev->stats.proc_dir_entry = p;
 248        return 0;
 249}
 250
 251int snmp6_unregister_dev(struct inet6_dev *idev)
 252{
 253        struct net *net = dev_net(idev->dev);
 254        if (!net->mib.proc_net_devsnmp6)
 255                return -ENOENT;
 256        if (!idev || !idev->stats.proc_dir_entry)
 257                return -EINVAL;
 258        remove_proc_entry(idev->stats.proc_dir_entry->name,
 259                          net->mib.proc_net_devsnmp6);
 260        idev->stats.proc_dir_entry = NULL;
 261        return 0;
 262}
 263
 264static int ipv6_proc_init_net(struct net *net)
 265{
 266        if (!proc_net_fops_create(net, "sockstat6", S_IRUGO,
 267                        &sockstat6_seq_fops))
 268                return -ENOMEM;
 269
 270        if (!proc_net_fops_create(net, "snmp6", S_IRUGO, &snmp6_seq_fops))
 271                goto proc_snmp6_fail;
 272
 273        net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);
 274        if (!net->mib.proc_net_devsnmp6)
 275                goto proc_dev_snmp6_fail;
 276        return 0;
 277
 278proc_snmp6_fail:
 279        proc_net_remove(net, "sockstat6");
 280proc_dev_snmp6_fail:
 281        proc_net_remove(net, "dev_snmp6");
 282        return -ENOMEM;
 283}
 284
 285static void ipv6_proc_exit_net(struct net *net)
 286{
 287        proc_net_remove(net, "sockstat6");
 288        proc_net_remove(net, "dev_snmp6");
 289        proc_net_remove(net, "snmp6");
 290}
 291
 292static struct pernet_operations ipv6_proc_ops = {
 293        .init = ipv6_proc_init_net,
 294        .exit = ipv6_proc_exit_net,
 295};
 296
 297int __init ipv6_misc_proc_init(void)
 298{
 299        return register_pernet_subsys(&ipv6_proc_ops);
 300}
 301
 302void ipv6_misc_proc_exit(void)
 303{
 304        unregister_pernet_subsys(&ipv6_proc_ops);
 305}
 306
 307