net/ipv4/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.  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 <linux/export.h>
  46 #include <net/sock.h>
  47 #include <net/raw.h>
  48
  49 /*
  50  *      Report socket allocation statistics [mea@utu.fi]
  51  */
  52 static int sockstat_seq_show(struct seq_file *seq, void *v)
  53 {
  54         struct net *net = seq->private;
  55         int orphans, sockets;
  56
  57         local_bh_disable();
  58         orphans = percpu_counter_sum_positive(&tcp_orphan_count);
  59         sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
  60         local_bh_enable();
  61
  62         socket_seq_show(seq);
  63         seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
  64                    sock_prot_inuse_get(net, &tcp_prot), orphans,
  65                    tcp_death_row.tw_count, sockets,
  66                    proto_memory_allocated(&tcp_prot));
  67         seq_printf(seq, "UDP: inuse %d mem %ld\n",
  68                    sock_prot_inuse_get(net, &udp_prot),
  69                    proto_memory_allocated(&udp_prot));
  70         seq_printf(seq, "UDPLITE: inuse %d\n",
  71                    sock_prot_inuse_get(net, &udplite_prot));
  72         seq_printf(seq, "RAW: inuse %d\n",
  73                    sock_prot_inuse_get(net, &raw_prot));
  74         seq_printf(seq,  "FRAG: inuse %d memory %d\n",
  75                         ip_frag_nqueues(net), ip_frag_mem(net));
  76         return 0;
  77 }
  78
  79 static int sockstat_seq_open(struct inode *inode, struct file *file)
  80 {
  81         return single_open_net(inode, file, sockstat_seq_show);
  82 }
  83
  84 static const struct file_operations sockstat_seq_fops = {
  85         .owner   = THIS_MODULE,
  86         .open    = sockstat_seq_open,
  87         .read    = seq_read,
  88         .llseek  = seq_lseek,
  89         .release = single_release_net,
  90 };
  91
  92 /* snmp items */
  93 static const struct snmp_mib snmp4_ipstats_list[] = {
  94         SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
  95         SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
  96         SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
  97         SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
  98         SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
  99         SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
 100         SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
 101         SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
 102         SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
 103         SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
 104         SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
 105         SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
 106         SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
 107         SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
 108         SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
 109         SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
 110         SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
 111         SNMP_MIB_SENTINEL
 112 };
 113
 114 /* Following RFC4293 items are displayed in /proc/net/netstat */
 115 static const struct snmp_mib snmp4_ipextstats_list[] = {
 116         SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
 117         SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
 118         SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
 119         SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
 120         SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
 121         SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
 122         SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
 123         SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
 124         SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
 125         SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
 126         SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
 127         SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
 128         SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
 129         SNMP_MIB_SENTINEL
 130 };
 131
 132 static const struct {
 133         const char *name;
 134         int index;
 135 } icmpmibmap[] = {
 136         { "DestUnreachs", ICMP_DEST_UNREACH },
 137         { "TimeExcds", ICMP_TIME_EXCEEDED },
 138         { "ParmProbs", ICMP_PARAMETERPROB },
 139         { "SrcQuenchs", ICMP_SOURCE_QUENCH },
 140         { "Redirects", ICMP_REDIRECT },
 141         { "Echos", ICMP_ECHO },
 142         { "EchoReps", ICMP_ECHOREPLY },
 143         { "Timestamps", ICMP_TIMESTAMP },
 144         { "TimestampReps", ICMP_TIMESTAMPREPLY },
 145         { "AddrMasks", ICMP_ADDRESS },
 146         { "AddrMaskReps", ICMP_ADDRESSREPLY },
 147         { NULL, 0 }
 148 };
 149
 150
 151 static const struct snmp_mib snmp4_tcp_list[] = {
 152         SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
 153         SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
 154         SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
 155         SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
 156         SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
 157         SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
 158         SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
 159         SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
 160         SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
 161         SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
 162         SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
 163         SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
 164         SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
 165         SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
 166         SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
 167         SNMP_MIB_SENTINEL
 168 };
 169
 170 static const struct snmp_mib snmp4_udp_list[] = {
 171         SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
 172         SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
 173         SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
 174         SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 175         SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
 176         SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
 177         SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
 178         SNMP_MIB_SENTINEL
 179 };
 180
 181 static const struct snmp_mib snmp4_net_list[] = {
 182         SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
 183         SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
 184         SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
 185         SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
 186         SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
 187         SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
 188         SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
 189         SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
 190         SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
 191         SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
 192         SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
 193         SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
 194         SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
 195         SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
 196         SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
 197         SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
 198         SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
 199         SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
 200         SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
 201         SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
 202         SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
 203         SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
 204         SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
 205         SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
 206         SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
 207         SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
 208         SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
 209         SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
 210         SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
 211         SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
 212         SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
 213         SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
 214         SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
 215         SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
 216         SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
 217         SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
 218         SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
 219         SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
 220         SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
 221         SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
 222         SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
 223         SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
 224         SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
 225         SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
 226         SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
 227         SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
 228         SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
 229         SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
 230         SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
 231         SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
 232         SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
 233         SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
 234         SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
 235         SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
 236         SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
 237         SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
 238         SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
 239         SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
 240         SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
 241         SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
 242         SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
 243         SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
 244         SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
 245         SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
 246         SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
 247         SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
 248         SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
 249         SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
 250         SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
 251         SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
 252         SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
 253         SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
 254         SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
 255         SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
 256         SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
 257         SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
 258         SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
 259         SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
 260         SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
 261         SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
 262         SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
 263         SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
 264         SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
 265         SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
 266         SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
 267         SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
 268         SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
 269         SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
 270         SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
 271         SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
 272         SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
 273         SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
 274         SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
 275         SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
 276         SNMP_MIB_ITEM("LowLatencyRxPackets", LINUX_MIB_LOWLATENCYRXPACKETS),
 277         SNMP_MIB_SENTINEL
 278 };
 279
 280 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
 281                              unsigned short *type, int count)
 282 {
 283         int j;
 284
 285         if (count) {
 286                 seq_printf(seq, "\nIcmpMsg:");
 287                 for (j = 0; j < count; ++j)
 288                         seq_printf(seq, " %sType%u",
 289                                 type[j] & 0x100 ? "Out" : "In",
 290                                 type[j] & 0xff);
 291                 seq_printf(seq, "\nIcmpMsg:");
 292                 for (j = 0; j < count; ++j)
 293                         seq_printf(seq, " %lu", vals[j]);
 294         }
 295 }
 296
 297 static void icmpmsg_put(struct seq_file *seq)
 298 {
 299 #define PERLINE 16
 300
 301         int i, count;
 302         unsigned short type[PERLINE];
 303         unsigned long vals[PERLINE], val;
 304         struct net *net = seq->private;
 305
 306         count = 0;
 307         for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
 308                 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
 309                 if (val) {
 310                         type[count] = i;
 311                         vals[count++] = val;
 312                 }
 313                 if (count == PERLINE) {
 314                         icmpmsg_put_line(seq, vals, type, count);
 315                         count = 0;
 316                 }
 317         }
 318         icmpmsg_put_line(seq, vals, type, count);
 319
 320 #undef PERLINE
 321 }
 322
 323 static void icmp_put(struct seq_file *seq)
 324 {
 325         int i;
 326         struct net *net = seq->private;
 327         atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
 328
 329         seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
 330         for (i=0; icmpmibmap[i].name != NULL; i++)
 331                 seq_printf(seq, " In%s", icmpmibmap[i].name);
 332         seq_printf(seq, " OutMsgs OutErrors");
 333         for (i=0; icmpmibmap[i].name != NULL; i++)
 334                 seq_printf(seq, " Out%s", icmpmibmap[i].name);
 335         seq_printf(seq, "\nIcmp: %lu %lu %lu",
 336                 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INMSGS),
 337                 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INERRORS),
 338                 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
 339         for (i=0; icmpmibmap[i].name != NULL; i++)
 340                 seq_printf(seq, " %lu",
 341                            atomic_long_read(ptr + icmpmibmap[i].index));
 342         seq_printf(seq, " %lu %lu",
 343                 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
 344                 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
 345         for (i=0; icmpmibmap[i].name != NULL; i++)
 346                 seq_printf(seq, " %lu",
 347                            atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
 348 }
 349
 350 /*
 351  *      Called from the PROCfs module. This outputs /proc/net/snmp.
 352  */
 353 static int snmp_seq_show(struct seq_file *seq, void *v)
 354 {
 355         int i;
 356         struct net *net = seq->private;
 357
 358         seq_puts(seq, "Ip: Forwarding DefaultTTL");
 359
 360         for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
 361                 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
 362
 363         seq_printf(seq, "\nIp: %d %d",
 364                    IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
 365                    sysctl_ip_default_ttl);
 366
 367         BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
 368         for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
 369                 seq_printf(seq, " %llu",
 370                            snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
 371                                              snmp4_ipstats_list[i].entry,
 372                                              offsetof(struct ipstats_mib, syncp)));
 373
 374         icmp_put(seq);  /* RFC 2011 compatibility */
 375         icmpmsg_put(seq);
 376
 377         seq_puts(seq, "\nTcp:");
 378         for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
 379                 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
 380
 381         seq_puts(seq, "\nTcp:");
 382         for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
 383                 /* MaxConn field is signed, RFC 2012 */
 384                 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
 385                         seq_printf(seq, " %ld",
 386                                    snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
 387                                                    snmp4_tcp_list[i].entry));
 388                 else
 389                         seq_printf(seq, " %lu",
 390                                    snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
 391                                                    snmp4_tcp_list[i].entry));
 392         }
 393
 394         seq_puts(seq, "\nUdp:");
 395         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
 396                 seq_printf(seq, " %s", snmp4_udp_list[i].name);
 397
 398         seq_puts(seq, "\nUdp:");
 399         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
 400                 seq_printf(seq, " %lu",
 401                            snmp_fold_field((void __percpu **)net->mib.udp_statistics,
 402                                            snmp4_udp_list[i].entry));
 403
 404         /* the UDP and UDP-Lite MIBs are the same */
 405         seq_puts(seq, "\nUdpLite:");
 406         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
 407                 seq_printf(seq, " %s", snmp4_udp_list[i].name);
 408
 409         seq_puts(seq, "\nUdpLite:");
 410         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
 411                 seq_printf(seq, " %lu",
 412                            snmp_fold_field((void __percpu **)net->mib.udplite_statistics,
 413                                            snmp4_udp_list[i].entry));
 414
 415         seq_putc(seq, '\n');
 416         return 0;
 417 }
 418
 419 static int snmp_seq_open(struct inode *inode, struct file *file)
 420 {
 421         return single_open_net(inode, file, snmp_seq_show);
 422 }
 423
 424 static const struct file_operations snmp_seq_fops = {
 425         .owner   = THIS_MODULE,
 426         .open    = snmp_seq_open,
 427         .read    = seq_read,
 428         .llseek  = seq_lseek,
 429         .release = single_release_net,
 430 };
 431
 432
 433
 434 /*
 435  *      Output /proc/net/netstat
 436  */
 437 static int netstat_seq_show(struct seq_file *seq, void *v)
 438 {
 439         int i;
 440         struct net *net = seq->private;
 441
 442         seq_puts(seq, "TcpExt:");
 443         for (i = 0; snmp4_net_list[i].name != NULL; i++)
 444                 seq_printf(seq, " %s", snmp4_net_list[i].name);
 445
 446         seq_puts(seq, "\nTcpExt:");
 447         for (i = 0; snmp4_net_list[i].name != NULL; i++)
 448                 seq_printf(seq, " %lu",
 449                            snmp_fold_field((void __percpu **)net->mib.net_statistics,
 450                                            snmp4_net_list[i].entry));
 451
 452         seq_puts(seq, "\nIpExt:");
 453         for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
 454                 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
 455
 456         seq_puts(seq, "\nIpExt:");
 457         for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
 458                 seq_printf(seq, " %llu",
 459                            snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
 460                                              snmp4_ipextstats_list[i].entry,
 461                                              offsetof(struct ipstats_mib, syncp)));
 462
 463         seq_putc(seq, '\n');
 464         return 0;
 465 }
 466
 467 static int netstat_seq_open(struct inode *inode, struct file *file)
 468 {
 469         return single_open_net(inode, file, netstat_seq_show);
 470 }
 471
 472 static const struct file_operations netstat_seq_fops = {
 473         .owner   = THIS_MODULE,
 474         .open    = netstat_seq_open,
 475         .read    = seq_read,
 476         .llseek  = seq_lseek,
 477         .release = single_release_net,
 478 };
 479
 480 static __net_init int ip_proc_init_net(struct net *net)
 481 {
 482         if (!proc_create("sockstat", S_IRUGO, net->proc_net,
 483                          &sockstat_seq_fops))
 484                 goto out_sockstat;
 485         if (!proc_create("netstat", S_IRUGO, net->proc_net, &netstat_seq_fops))
 486                 goto out_netstat;
 487         if (!proc_create("snmp", S_IRUGO, net->proc_net, &snmp_seq_fops))
 488                 goto out_snmp;
 489
 490         return 0;
 491
 492 out_snmp:
 493         remove_proc_entry("netstat", net->proc_net);
 494 out_netstat:
 495         remove_proc_entry("sockstat", net->proc_net);
 496 out_sockstat:
 497         return -ENOMEM;
 498 }
 499
 500 static __net_exit void ip_proc_exit_net(struct net *net)
 501 {
 502         remove_proc_entry("snmp", net->proc_net);
 503         remove_proc_entry("netstat", net->proc_net);
 504         remove_proc_entry("sockstat", net->proc_net);
 505 }
 506
 507 static __net_initdata struct pernet_operations ip_proc_ops = {
 508         .init = ip_proc_init_net,
 509         .exit = ip_proc_exit_net,
 510 };
 511
 512 int __init ip_misc_proc_init(void)
 513 {
 514         return register_pernet_subsys(&ip_proc_ops);
 515 }
 516