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 <linux/export.h>
  25#include <net/net_namespace.h>
  26#include <net/ip.h>
  27#include <net/sock.h>
  28#include <net/tcp.h>
  29#include <net/udp.h>
  30#include <net/transp_v6.h>
  31#include <net/ipv6.h>
  32
  33static int sockstat6_seq_show(struct seq_file *seq, void *v)
  34{
  35        struct net *net = seq->private;
  36
  37        seq_printf(seq, "TCP6: inuse %d\n",
  38                       sock_prot_inuse_get(net, &tcpv6_prot));
  39        seq_printf(seq, "UDP6: inuse %d\n",
  40                       sock_prot_inuse_get(net, &udpv6_prot));
  41        seq_printf(seq, "UDPLITE6: inuse %d\n",
  42                        sock_prot_inuse_get(net, &udplitev6_prot));
  43        seq_printf(seq, "RAW6: inuse %d\n",
  44                       sock_prot_inuse_get(net, &rawv6_prot));
  45        seq_printf(seq, "FRAG6: inuse %d memory %d\n",
  46                       ip6_frag_nqueues(net), ip6_frag_mem(net));
  47        return 0;
  48}
  49
  50static int sockstat6_seq_open(struct inode *inode, struct file *file)
  51{
  52        return single_open_net(inode, file, sockstat6_seq_show);
  53}
  54
  55static const struct file_operations sockstat6_seq_fops = {
  56        .owner   = THIS_MODULE,
  57        .open    = sockstat6_seq_open,
  58        .read    = seq_read,
  59        .llseek  = seq_lseek,
  60        .release = single_release_net,
  61};
  62
  63static const struct snmp_mib snmp6_ipstats_list[] = {
  64/* ipv6 mib according to RFC 2465 */
  65        SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS),
  66        SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
  67        SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
  68        SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
  69        SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
  70        SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
  71        SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
  72        SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
  73        SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
  74        SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
  75        SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTPKTS),
  76        SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
  77        SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
  78        SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
  79        SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
  80        SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
  81        SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
  82        SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
  83        SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
  84        SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
  85        SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
  86        SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
  87        SNMP_MIB_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS),
  88        SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS),
  89        SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
  90        SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
  91        SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
  92        SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
  93        SNMP_MIB_SENTINEL
  94};
  95
  96static const struct snmp_mib snmp6_icmp6_list[] = {
  97/* icmpv6 mib according to RFC 2466 */
  98        SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
  99        SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
 100        SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
 101        SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS),
 102        SNMP_MIB_SENTINEL
 103};
 104
 105/* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
 106static const char *const icmp6type2name[256] = {
 107        [ICMPV6_DEST_UNREACH] = "DestUnreachs",
 108        [ICMPV6_PKT_TOOBIG] = "PktTooBigs",
 109        [ICMPV6_TIME_EXCEED] = "TimeExcds",
 110        [ICMPV6_PARAMPROB] = "ParmProblems",
 111        [ICMPV6_ECHO_REQUEST] = "Echos",
 112        [ICMPV6_ECHO_REPLY] = "EchoReplies",
 113        [ICMPV6_MGM_QUERY] = "GroupMembQueries",
 114        [ICMPV6_MGM_REPORT] = "GroupMembResponses",
 115        [ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
 116        [ICMPV6_MLD2_REPORT] = "MLDv2Reports",
 117        [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
 118        [NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
 119        [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
 120        [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
 121        [NDISC_REDIRECT] = "Redirects",
 122};
 123
 124
 125static const struct snmp_mib snmp6_udp6_list[] = {
 126        SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
 127        SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
 128        SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
 129        SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 130        SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
 131        SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS),
 132        SNMP_MIB_SENTINEL
 133};
 134
 135static const struct snmp_mib snmp6_udplite6_list[] = {
 136        SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
 137        SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
 138        SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
 139        SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 140        SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
 141        SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS),
 142        SNMP_MIB_SENTINEL
 143};
 144
 145static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib)
 146{
 147        char name[32];
 148        int i;
 149
 150        /* print by name -- deprecated items */
 151        for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 152                int icmptype;
 153                const char *p;
 154
 155                icmptype = i & 0xff;
 156                p = icmp6type2name[icmptype];
 157                if (!p) /* don't print un-named types here */
 158                        continue;
 159                snprintf(name, sizeof(name), "Icmp6%s%s",
 160                        i & 0x100 ? "Out" : "In", p);
 161                seq_printf(seq, "%-32s\t%lu\n", name,
 162                           atomic_long_read(smib + i));
 163        }
 164
 165        /* print by number (nonzero only) - ICMPMsgStat format */
 166        for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 167                unsigned long val;
 168
 169                val = atomic_long_read(smib + i);
 170                if (!val)
 171                        continue;
 172                snprintf(name, sizeof(name), "Icmp6%sType%u",
 173                        i & 0x100 ?  "Out" : "In", i & 0xff);
 174                seq_printf(seq, "%-32s\t%lu\n", name, val);
 175        }
 176}
 177
 178/* can be called either with percpu mib (pcpumib != NULL),
 179 * or shared one (smib != NULL)
 180 */
 181static void snmp6_seq_show_item(struct seq_file *seq, void __percpu **pcpumib,
 182                                atomic_long_t *smib,
 183                                const struct snmp_mib *itemlist)
 184{
 185        int i;
 186        unsigned long val;
 187
 188        for (i = 0; itemlist[i].name; i++) {
 189                val = pcpumib ?
 190                        snmp_fold_field(pcpumib, itemlist[i].entry) :
 191                        atomic_long_read(smib + itemlist[i].entry);
 192                seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, val);
 193        }
 194}
 195
 196static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu **mib,
 197                                  const struct snmp_mib *itemlist, size_t syncpoff)
 198{
 199        int i;
 200
 201        for (i = 0; itemlist[i].name; i++)
 202                seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name,
 203                           snmp_fold_field64(mib, itemlist[i].entry, syncpoff));
 204}
 205
 206static int snmp6_seq_show(struct seq_file *seq, void *v)
 207{
 208        struct net *net = (struct net *)seq->private;
 209
 210        snmp6_seq_show_item64(seq, (void __percpu **)net->mib.ipv6_statistics,
 211                            snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
 212        snmp6_seq_show_item(seq, (void __percpu **)net->mib.icmpv6_statistics,
 213                            NULL, snmp6_icmp6_list);
 214        snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs);
 215        snmp6_seq_show_item(seq, (void __percpu **)net->mib.udp_stats_in6,
 216                            NULL, snmp6_udp6_list);
 217        snmp6_seq_show_item(seq, (void __percpu **)net->mib.udplite_stats_in6,
 218                            NULL, snmp6_udplite6_list);
 219        return 0;
 220}
 221
 222static int snmp6_seq_open(struct inode *inode, struct file *file)
 223{
 224        return single_open_net(inode, file, snmp6_seq_show);
 225}
 226
 227static const struct file_operations snmp6_seq_fops = {
 228        .owner   = THIS_MODULE,
 229        .open    = snmp6_seq_open,
 230        .read    = seq_read,
 231        .llseek  = seq_lseek,
 232        .release = single_release_net,
 233};
 234
 235static int snmp6_dev_seq_show(struct seq_file *seq, void *v)
 236{
 237        struct inet6_dev *idev = (struct inet6_dev *)seq->private;
 238
 239        seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
 240        snmp6_seq_show_item64(seq, (void __percpu **)idev->stats.ipv6,
 241                            snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
 242        snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs,
 243                            snmp6_icmp6_list);
 244        snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs);
 245        return 0;
 246}
 247
 248static int snmp6_dev_seq_open(struct inode *inode, struct file *file)
 249{
 250        return single_open(file, snmp6_dev_seq_show, PDE(inode)->data);
 251}
 252
 253static const struct file_operations snmp6_dev_seq_fops = {
 254        .owner   = THIS_MODULE,
 255        .open    = snmp6_dev_seq_open,
 256        .read    = seq_read,
 257        .llseek  = seq_lseek,
 258        .release = single_release,
 259};
 260
 261int snmp6_register_dev(struct inet6_dev *idev)
 262{
 263        struct proc_dir_entry *p;
 264        struct net *net;
 265
 266        if (!idev || !idev->dev)
 267                return -EINVAL;
 268
 269        net = dev_net(idev->dev);
 270        if (!net->mib.proc_net_devsnmp6)
 271                return -ENOENT;
 272
 273        p = proc_create_data(idev->dev->name, S_IRUGO,
 274                             net->mib.proc_net_devsnmp6,
 275                             &snmp6_dev_seq_fops, idev);
 276        if (!p)
 277                return -ENOMEM;
 278
 279        idev->stats.proc_dir_entry = p;
 280        return 0;
 281}
 282
 283int snmp6_unregister_dev(struct inet6_dev *idev)
 284{
 285        struct net *net = dev_net(idev->dev);
 286        if (!net->mib.proc_net_devsnmp6)
 287                return -ENOENT;
 288        if (!idev->stats.proc_dir_entry)
 289                return -EINVAL;
 290        remove_proc_entry(idev->stats.proc_dir_entry->name,
 291                          net->mib.proc_net_devsnmp6);
 292        idev->stats.proc_dir_entry = NULL;
 293        return 0;
 294}
 295
 296static int __net_init ipv6_proc_init_net(struct net *net)
 297{
 298        if (!proc_net_fops_create(net, "sockstat6", S_IRUGO,
 299                        &sockstat6_seq_fops))
 300                return -ENOMEM;
 301
 302        if (!proc_net_fops_create(net, "snmp6", S_IRUGO, &snmp6_seq_fops))
 303                goto proc_snmp6_fail;
 304
 305        net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);
 306        if (!net->mib.proc_net_devsnmp6)
 307                goto proc_dev_snmp6_fail;
 308        return 0;
 309
 310proc_dev_snmp6_fail:
 311        proc_net_remove(net, "snmp6");
 312proc_snmp6_fail:
 313        proc_net_remove(net, "sockstat6");
 314        return -ENOMEM;
 315}
 316
 317static void __net_exit ipv6_proc_exit_net(struct net *net)
 318{
 319        proc_net_remove(net, "sockstat6");
 320        proc_net_remove(net, "dev_snmp6");
 321        proc_net_remove(net, "snmp6");
 322}
 323
 324static struct pernet_operations ipv6_proc_ops = {
 325        .init = ipv6_proc_init_net,
 326        .exit = ipv6_proc_exit_net,
 327};
 328
 329int __init ipv6_misc_proc_init(void)
 330{
 331        return register_pernet_subsys(&ipv6_proc_ops);
 332}
 333
 334void ipv6_misc_proc_exit(void)
 335{
 336        unregister_pernet_subsys(&ipv6_proc_ops);
 337}
 338
 339
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