linux/net/ipv4/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.  It is mainly used for debugging and
   8 *              statistics.
   9 *
  10 * Authors:     Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  11 *              Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
  12 *              Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
  13 *              Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de>
  14 *
  15 * Fixes:
  16 *              Alan Cox        :       UDP sockets show the rxqueue/txqueue
  17 *                                      using hint flag for the netinfo.
  18 *      Pauline Middelink       :       identd support
  19 *              Alan Cox        :       Make /proc safer.
  20 *      Erik Schoenfelder       :       /proc/net/snmp
  21 *              Alan Cox        :       Handle dead sockets properly.
  22 *      Gerhard Koerting        :       Show both timers
  23 *              Alan Cox        :       Allow inode to be NULL (kernel socket)
  24 *      Andi Kleen              :       Add support for open_requests and
  25 *                                      split functions for more readibility.
  26 *      Andi Kleen              :       Add support for /proc/net/netstat
  27 *      Arnaldo C. Melo         :       Convert to seq_file
  28 *
  29 *              This program is free software; you can redistribute it and/or
  30 *              modify it under the terms of the GNU General Public License
  31 *              as published by the Free Software Foundation; either version
  32 *              2 of the License, or (at your option) any later version.
  33 */
  34#include <linux/types.h>
  35#include <net/net_namespace.h>
  36#include <net/icmp.h>
  37#include <net/protocol.h>
  38#include <net/tcp.h>
  39#include <net/udp.h>
  40#include <net/udplite.h>
  41#include <linux/bottom_half.h>
  42#include <linux/inetdevice.h>
  43#include <linux/proc_fs.h>
  44#include <linux/seq_file.h>
  45#include <net/sock.h>
  46#include <net/raw.h>
  47
  48/*
  49 *      Report socket allocation statistics [mea@utu.fi]
  50 */
  51static int sockstat_seq_show(struct seq_file *seq, void *v)
  52{
  53        struct net *net = seq->private;
  54        int orphans, sockets;
  55
  56        local_bh_disable();
  57        orphans = percpu_counter_sum_positive(&tcp_orphan_count);
  58        sockets = percpu_counter_sum_positive(&tcp_sockets_allocated);
  59        local_bh_enable();
  60
  61        socket_seq_show(seq);
  62        seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
  63                   sock_prot_inuse_get(net, &tcp_prot), orphans,
  64                   tcp_death_row.tw_count, sockets,
  65                   atomic_read(&tcp_memory_allocated));
  66        seq_printf(seq, "UDP: inuse %d mem %d\n",
  67                   sock_prot_inuse_get(net, &udp_prot),
  68                   atomic_read(&udp_memory_allocated));
  69        seq_printf(seq, "UDPLITE: inuse %d\n",
  70                   sock_prot_inuse_get(net, &udplite_prot));
  71        seq_printf(seq, "RAW: inuse %d\n",
  72                   sock_prot_inuse_get(net, &raw_prot));
  73        seq_printf(seq,  "FRAG: inuse %d memory %d\n",
  74                        ip_frag_nqueues(net), ip_frag_mem(net));
  75        return 0;
  76}
  77
  78static int sockstat_seq_open(struct inode *inode, struct file *file)
  79{
  80        return single_open_net(inode, file, sockstat_seq_show);
  81}
  82
  83static const struct file_operations sockstat_seq_fops = {
  84        .owner   = THIS_MODULE,
  85        .open    = sockstat_seq_open,
  86        .read    = seq_read,
  87        .llseek  = seq_lseek,
  88        .release = single_release_net,
  89};
  90
  91/* snmp items */
  92static const struct snmp_mib snmp4_ipstats_list[] = {
  93        SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
  94        SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
  95        SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
  96        SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
  97        SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
  98        SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
  99        SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
 100        SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
 101        SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
 102        SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
 103        SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
 104        SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
 105        SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
 106        SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
 107        SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
 108        SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
 109        SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
 110        SNMP_MIB_SENTINEL
 111};
 112
 113/* Following RFC4293 items are displayed in /proc/net/netstat */
 114static const struct snmp_mib snmp4_ipextstats_list[] = {
 115        SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
 116        SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
 117        SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
 118        SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
 119        SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
 120        SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
 121        SNMP_MIB_SENTINEL
 122};
 123
 124static struct {
 125        char *name;
 126        int index;
 127} icmpmibmap[] = {
 128        { "DestUnreachs", ICMP_DEST_UNREACH },
 129        { "TimeExcds", ICMP_TIME_EXCEEDED },
 130        { "ParmProbs", ICMP_PARAMETERPROB },
 131        { "SrcQuenchs", ICMP_SOURCE_QUENCH },
 132        { "Redirects", ICMP_REDIRECT },
 133        { "Echos", ICMP_ECHO },
 134        { "EchoReps", ICMP_ECHOREPLY },
 135        { "Timestamps", ICMP_TIMESTAMP },
 136        { "TimestampReps", ICMP_TIMESTAMPREPLY },
 137        { "AddrMasks", ICMP_ADDRESS },
 138        { "AddrMaskReps", ICMP_ADDRESSREPLY },
 139        { NULL, 0 }
 140};
 141
 142
 143static const struct snmp_mib snmp4_tcp_list[] = {
 144        SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
 145        SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
 146        SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
 147        SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
 148        SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
 149        SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
 150        SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
 151        SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
 152        SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
 153        SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
 154        SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
 155        SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
 156        SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
 157        SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
 158        SNMP_MIB_SENTINEL
 159};
 160
 161static const struct snmp_mib snmp4_udp_list[] = {
 162        SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
 163        SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
 164        SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
 165        SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 166        SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
 167        SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
 168        SNMP_MIB_SENTINEL
 169};
 170
 171static const struct snmp_mib snmp4_net_list[] = {
 172        SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
 173        SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
 174        SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
 175        SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
 176        SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
 177        SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
 178        SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
 179        SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
 180        SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
 181        SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
 182        SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
 183        SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
 184        SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
 185        SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
 186        SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
 187        SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
 188        SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
 189        SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
 190        SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
 191        SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
 192        SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
 193        SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
 194        SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
 195        SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
 196        SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
 197        SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
 198        SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
 199        SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
 200        SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
 201        SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
 202        SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
 203        SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
 204        SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
 205        SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
 206        SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
 207        SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
 208        SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
 209        SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
 210        SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
 211        SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
 212        SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
 213        SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
 214        SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
 215        SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
 216        SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
 217        SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
 218        SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
 219        SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
 220        SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
 221        SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
 222        SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
 223        SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
 224        SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
 225        SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
 226        SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
 227        SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
 228        SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
 229        SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
 230        SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
 231        SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
 232        SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
 233        SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
 234        SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
 235        SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
 236        SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
 237        SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
 238        SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
 239        SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
 240        SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
 241        SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
 242        SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
 243        SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
 244        SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
 245        SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
 246        SNMP_MIB_SENTINEL
 247};
 248
 249static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
 250                             unsigned short *type, int count)
 251{
 252        int j;
 253
 254        if (count) {
 255                seq_printf(seq, "\nIcmpMsg:");
 256                for (j = 0; j < count; ++j)
 257                        seq_printf(seq, " %sType%u",
 258                                type[j] & 0x100 ? "Out" : "In",
 259                                type[j] & 0xff);
 260                seq_printf(seq, "\nIcmpMsg:");
 261                for (j = 0; j < count; ++j)
 262                        seq_printf(seq, " %lu", vals[j]);
 263        }
 264}
 265
 266static void icmpmsg_put(struct seq_file *seq)
 267{
 268#define PERLINE 16
 269
 270        int i, count;
 271        unsigned short type[PERLINE];
 272        unsigned long vals[PERLINE], val;
 273        struct net *net = seq->private;
 274
 275        count = 0;
 276        for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
 277                val = snmp_fold_field((void **) net->mib.icmpmsg_statistics, i);
 278                if (val) {
 279                        type[count] = i;
 280                        vals[count++] = val;
 281                }
 282                if (count == PERLINE) {
 283                        icmpmsg_put_line(seq, vals, type, count);
 284                        count = 0;
 285                }
 286        }
 287        icmpmsg_put_line(seq, vals, type, count);
 288
 289#undef PERLINE
 290}
 291
 292static void icmp_put(struct seq_file *seq)
 293{
 294        int i;
 295        struct net *net = seq->private;
 296
 297        seq_puts(seq, "\nIcmp: InMsgs InErrors");
 298        for (i=0; icmpmibmap[i].name != NULL; i++)
 299                seq_printf(seq, " In%s", icmpmibmap[i].name);
 300        seq_printf(seq, " OutMsgs OutErrors");
 301        for (i=0; icmpmibmap[i].name != NULL; i++)
 302                seq_printf(seq, " Out%s", icmpmibmap[i].name);
 303        seq_printf(seq, "\nIcmp: %lu %lu",
 304                snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INMSGS),
 305                snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INERRORS));
 306        for (i=0; icmpmibmap[i].name != NULL; i++)
 307                seq_printf(seq, " %lu",
 308                        snmp_fold_field((void **) net->mib.icmpmsg_statistics,
 309                                icmpmibmap[i].index));
 310        seq_printf(seq, " %lu %lu",
 311                snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
 312                snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
 313        for (i=0; icmpmibmap[i].name != NULL; i++)
 314                seq_printf(seq, " %lu",
 315                        snmp_fold_field((void **) net->mib.icmpmsg_statistics,
 316                                icmpmibmap[i].index | 0x100));
 317}
 318
 319/*
 320 *      Called from the PROCfs module. This outputs /proc/net/snmp.
 321 */
 322static int snmp_seq_show(struct seq_file *seq, void *v)
 323{
 324        int i;
 325        struct net *net = seq->private;
 326
 327        seq_puts(seq, "Ip: Forwarding DefaultTTL");
 328
 329        for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
 330                seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
 331
 332        seq_printf(seq, "\nIp: %d %d",
 333                   IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
 334                   sysctl_ip_default_ttl);
 335
 336        for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
 337                seq_printf(seq, " %lu",
 338                           snmp_fold_field((void **)net->mib.ip_statistics,
 339                                           snmp4_ipstats_list[i].entry));
 340
 341        icmp_put(seq);  /* RFC 2011 compatibility */
 342        icmpmsg_put(seq);
 343
 344        seq_puts(seq, "\nTcp:");
 345        for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
 346                seq_printf(seq, " %s", snmp4_tcp_list[i].name);
 347
 348        seq_puts(seq, "\nTcp:");
 349        for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
 350                /* MaxConn field is signed, RFC 2012 */
 351                if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
 352                        seq_printf(seq, " %ld",
 353                                   snmp_fold_field((void **)net->mib.tcp_statistics,
 354                                                   snmp4_tcp_list[i].entry));
 355                else
 356                        seq_printf(seq, " %lu",
 357                                   snmp_fold_field((void **)net->mib.tcp_statistics,
 358                                                   snmp4_tcp_list[i].entry));
 359        }
 360
 361        seq_puts(seq, "\nUdp:");
 362        for (i = 0; snmp4_udp_list[i].name != NULL; i++)
 363                seq_printf(seq, " %s", snmp4_udp_list[i].name);
 364
 365        seq_puts(seq, "\nUdp:");
 366        for (i = 0; snmp4_udp_list[i].name != NULL; i++)
 367                seq_printf(seq, " %lu",
 368                           snmp_fold_field((void **)net->mib.udp_statistics,
 369                                           snmp4_udp_list[i].entry));
 370
 371        /* the UDP and UDP-Lite MIBs are the same */
 372        seq_puts(seq, "\nUdpLite:");
 373        for (i = 0; snmp4_udp_list[i].name != NULL; i++)
 374                seq_printf(seq, " %s", snmp4_udp_list[i].name);
 375
 376        seq_puts(seq, "\nUdpLite:");
 377        for (i = 0; snmp4_udp_list[i].name != NULL; i++)
 378                seq_printf(seq, " %lu",
 379                           snmp_fold_field((void **)net->mib.udplite_statistics,
 380                                           snmp4_udp_list[i].entry));
 381
 382        seq_putc(seq, '\n');
 383        return 0;
 384}
 385
 386static int snmp_seq_open(struct inode *inode, struct file *file)
 387{
 388        return single_open_net(inode, file, snmp_seq_show);
 389}
 390
 391static const struct file_operations snmp_seq_fops = {
 392        .owner   = THIS_MODULE,
 393        .open    = snmp_seq_open,
 394        .read    = seq_read,
 395        .llseek  = seq_lseek,
 396        .release = single_release_net,
 397};
 398
 399
 400
 401/*
 402 *      Output /proc/net/netstat
 403 */
 404static int netstat_seq_show(struct seq_file *seq, void *v)
 405{
 406        int i;
 407        struct net *net = seq->private;
 408
 409        seq_puts(seq, "TcpExt:");
 410        for (i = 0; snmp4_net_list[i].name != NULL; i++)
 411                seq_printf(seq, " %s", snmp4_net_list[i].name);
 412
 413        seq_puts(seq, "\nTcpExt:");
 414        for (i = 0; snmp4_net_list[i].name != NULL; i++)
 415                seq_printf(seq, " %lu",
 416                           snmp_fold_field((void **)net->mib.net_statistics,
 417                                           snmp4_net_list[i].entry));
 418
 419        seq_puts(seq, "\nIpExt:");
 420        for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
 421                seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
 422
 423        seq_puts(seq, "\nIpExt:");
 424        for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
 425                seq_printf(seq, " %lu",
 426                           snmp_fold_field((void **)net->mib.ip_statistics,
 427                                           snmp4_ipextstats_list[i].entry));
 428
 429        seq_putc(seq, '\n');
 430        return 0;
 431}
 432
 433static int netstat_seq_open(struct inode *inode, struct file *file)
 434{
 435        return single_open_net(inode, file, netstat_seq_show);
 436}
 437
 438static const struct file_operations netstat_seq_fops = {
 439        .owner   = THIS_MODULE,
 440        .open    = netstat_seq_open,
 441        .read    = seq_read,
 442        .llseek  = seq_lseek,
 443        .release = single_release_net,
 444};
 445
 446static __net_init int ip_proc_init_net(struct net *net)
 447{
 448        if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops))
 449                goto out_sockstat;
 450        if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops))
 451                goto out_netstat;
 452        if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops))
 453                goto out_snmp;
 454
 455        return 0;
 456
 457out_snmp:
 458        proc_net_remove(net, "netstat");
 459out_netstat:
 460        proc_net_remove(net, "sockstat");
 461out_sockstat:
 462        return -ENOMEM;
 463}
 464
 465static __net_exit void ip_proc_exit_net(struct net *net)
 466{
 467        proc_net_remove(net, "snmp");
 468        proc_net_remove(net, "netstat");
 469        proc_net_remove(net, "sockstat");
 470}
 471
 472static __net_initdata struct pernet_operations ip_proc_ops = {
 473        .init = ip_proc_init_net,
 474        .exit = ip_proc_exit_net,
 475};
 476
 477int __init ip_misc_proc_init(void)
 478{
 479        return register_pernet_subsys(&ip_proc_ops);
 480}
 481
 482