kernel/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         unsigned int frag_mem;
  56         int orphans, sockets;
  57
  58         local_bh_disable();
  59         orphans = percpu_counter_sum_positive(&tcp_orphan_count);
  60         sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
  61         local_bh_enable();
  62
  63         socket_seq_show(seq);
  64         seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
  65                    sock_prot_inuse_get(net, &tcp_prot), orphans,
  66                    atomic_read(&tcp_death_row.tw_count), sockets,
  67                    proto_memory_allocated(&tcp_prot));
  68         seq_printf(seq, "UDP: inuse %d mem %ld\n",
  69                    sock_prot_inuse_get(net, &udp_prot),
  70                    proto_memory_allocated(&udp_prot));
  71         seq_printf(seq, "UDPLITE: inuse %d\n",
  72                    sock_prot_inuse_get(net, &udplite_prot));
  73         seq_printf(seq, "RAW: inuse %d\n",
  74                    sock_prot_inuse_get(net, &raw_prot));
  75         frag_mem = ip_frag_mem(net);
  76         seq_printf(seq,  "FRAG: inuse %u memory %u\n", !!frag_mem, frag_mem);
  77         return 0;
  78 }
  79
  80 static int sockstat_seq_open(struct inode *inode, struct file *file)
  81 {
  82         return single_open_net(inode, file, sockstat_seq_show);
  83 }
  84
  85 static const struct file_operations sockstat_seq_fops = {
  86         .owner   = THIS_MODULE,
  87         .open    = sockstat_seq_open,
  88         .read    = seq_read,
  89         .llseek  = seq_lseek,
  90         .release = single_release_net,
  91 };
  92
  93 /* snmp items */
  94 static const struct snmp_mib snmp4_ipstats_list[] = {
  95         SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
  96         SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
  97         SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
  98         SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
  99         SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
 100         SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
 101         SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
 102         SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
 103         SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
 104         SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
 105         SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
 106         SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
 107         SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
 108         SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
 109         SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
 110         SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
 111         SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
 112         SNMP_MIB_SENTINEL
 113 };
 114
 115 /* Following items are displayed in /proc/net/netstat */
 116 static const struct snmp_mib snmp4_ipextstats_list[] = {
 117         SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
 118         SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
 119         SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
 120         SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
 121         SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
 122         SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
 123         SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
 124         SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
 125         SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
 126         SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
 127         SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
 128         SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
 129         /* Non RFC4293 fields */
 130         SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
 131         SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
 132         SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
 133         SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
 134         SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS),
 135         SNMP_MIB_SENTINEL
 136 };
 137
 138 static const struct {
 139         const char *name;
 140         int index;
 141 } icmpmibmap[] = {
 142         { "DestUnreachs", ICMP_DEST_UNREACH },
 143         { "TimeExcds", ICMP_TIME_EXCEEDED },
 144         { "ParmProbs", ICMP_PARAMETERPROB },
 145         { "SrcQuenchs", ICMP_SOURCE_QUENCH },
 146         { "Redirects", ICMP_REDIRECT },
 147         { "Echos", ICMP_ECHO },
 148         { "EchoReps", ICMP_ECHOREPLY },
 149         { "Timestamps", ICMP_TIMESTAMP },
 150         { "TimestampReps", ICMP_TIMESTAMPREPLY },
 151         { "AddrMasks", ICMP_ADDRESS },
 152         { "AddrMaskReps", ICMP_ADDRESSREPLY },
 153         { NULL, 0 }
 154 };
 155
 156
 157 static const struct snmp_mib snmp4_tcp_list[] = {
 158         SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
 159         SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
 160         SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
 161         SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
 162         SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
 163         SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
 164         SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
 165         SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
 166         SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
 167         SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
 168         SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
 169         SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
 170         SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
 171         SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
 172         SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
 173         SNMP_MIB_SENTINEL
 174 };
 175
 176 static const struct snmp_mib snmp4_udp_list[] = {
 177         SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
 178         SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
 179         SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
 180         SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 181         SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
 182         SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
 183         SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
 184         SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
 185         SNMP_MIB_SENTINEL
 186 };
 187
 188 static const struct snmp_mib snmp4_net_list[] = {
 189         SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
 190         SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
 191         SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
 192         SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
 193         SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
 194         SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
 195         SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
 196         SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
 197         SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
 198         SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
 199         SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
 200         SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
 201         SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
 202         SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
 203         SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
 204         SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
 205         SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
 206         SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
 207         SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
 208         SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
 209         SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
 210         SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
 211         SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
 212         SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
 213         SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
 214         SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
 215         SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
 216         SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
 217         SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
 218         SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
 219         SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
 220         SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
 221         SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
 222         SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
 223         SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
 224         SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
 225         SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
 226         SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
 227         SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
 228         SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
 229         SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
 230         SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
 231         SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
 232         SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
 233         SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
 234         SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
 235         SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
 236         SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
 237         SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
 238         SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
 239         SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
 240         SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
 241         SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
 242         SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
 243         SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
 244         SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
 245         SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
 246         SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
 247         SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
 248         SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
 249         SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
 250         SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
 251         SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
 252         SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
 253         SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
 254         SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
 255         SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
 256         SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
 257         SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
 258         SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
 259         SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
 260         SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
 261         SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
 262         SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
 263         SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
 264         SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
 265         SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
 266         SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
 267         SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
 268         SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
 269         SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
 270         SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
 271         SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
 272         SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
 273         SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
 274         SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
 275         SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
 276         SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
 277         SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
 278         SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
 279         SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
 280         SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
 281         SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
 282         SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
 283         SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
 284         SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
 285         SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
 286         SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
 287         SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
 288         SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
 289         SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
 290         SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
 291         SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT),
 292         SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND),
 293         SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT),
 294         SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND),
 295         SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV),
 296         SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS),
 297         SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ),
 298         SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2),
 299         SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT),
 300         SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE),
 301         SNMP_MIB_SENTINEL
 302 };
 303
 304 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
 305                              unsigned short *type, int count)
 306 {
 307         int j;
 308
 309         if (count) {
 310                 seq_puts(seq, "\nIcmpMsg:");
 311                 for (j = 0; j < count; ++j)
 312                         seq_printf(seq, " %sType%u",
 313                                 type[j] & 0x100 ? "Out" : "In",
 314                                 type[j] & 0xff);
 315                 seq_puts(seq, "\nIcmpMsg:");
 316                 for (j = 0; j < count; ++j)
 317                         seq_printf(seq, " %lu", vals[j]);
 318         }
 319 }
 320
 321 static void icmpmsg_put(struct seq_file *seq)
 322 {
 323 #define PERLINE 16
 324
 325         int i, count;
 326         unsigned short type[PERLINE];
 327         unsigned long vals[PERLINE], val;
 328         struct net *net = seq->private;
 329
 330         count = 0;
 331         for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
 332                 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
 333                 if (val) {
 334                         type[count] = i;
 335                         vals[count++] = val;
 336                 }
 337                 if (count == PERLINE) {
 338                         icmpmsg_put_line(seq, vals, type, count);
 339                         count = 0;
 340                 }
 341         }
 342         icmpmsg_put_line(seq, vals, type, count);
 343
 344 #undef PERLINE
 345 }
 346
 347 static void icmp_put(struct seq_file *seq)
 348 {
 349         int i;
 350         struct net *net = seq->private;
 351         atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
 352
 353         seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
 354         for (i = 0; icmpmibmap[i].name != NULL; i++)
 355                 seq_printf(seq, " In%s", icmpmibmap[i].name);
 356         seq_puts(seq, " OutMsgs OutErrors");
 357         for (i = 0; icmpmibmap[i].name != NULL; i++)
 358                 seq_printf(seq, " Out%s", icmpmibmap[i].name);
 359         seq_printf(seq, "\nIcmp: %lu %lu %lu",
 360                 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
 361                 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
 362                 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
 363         for (i = 0; icmpmibmap[i].name != NULL; i++)
 364                 seq_printf(seq, " %lu",
 365                            atomic_long_read(ptr + icmpmibmap[i].index));
 366         seq_printf(seq, " %lu %lu",
 367                 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
 368                 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
 369         for (i = 0; icmpmibmap[i].name != NULL; i++)
 370                 seq_printf(seq, " %lu",
 371                            atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
 372 }
 373
 374 /*
 375  *      Called from the PROCfs module. This outputs /proc/net/snmp.
 376  */
 377 static int snmp_seq_show(struct seq_file *seq, void *v)
 378 {
 379         int i;
 380         struct net *net = seq->private;
 381
 382         seq_puts(seq, "Ip: Forwarding DefaultTTL");
 383
 384         for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
 385                 seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
 386
 387         seq_printf(seq, "\nIp: %d %d",
 388                    IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
 389                    sysctl_ip_default_ttl);
 390
 391         BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
 392         for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
 393                 seq_printf(seq, " %llu",
 394                            snmp_fold_field64(net->mib.ip_statistics,
 395                                              snmp4_ipstats_list[i].entry,
 396                                              offsetof(struct ipstats_mib, syncp)));
 397
 398         icmp_put(seq);  /* RFC 2011 compatibility */
 399         icmpmsg_put(seq);
 400
 401         seq_puts(seq, "\nTcp:");
 402         for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
 403                 seq_printf(seq, " %s", snmp4_tcp_list[i].name);
 404
 405         seq_puts(seq, "\nTcp:");
 406         for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
 407                 /* MaxConn field is signed, RFC 2012 */
 408                 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
 409                         seq_printf(seq, " %ld",
 410                                    snmp_fold_field(net->mib.tcp_statistics,
 411                                                    snmp4_tcp_list[i].entry));
 412                 else
 413                         seq_printf(seq, " %lu",
 414                                    snmp_fold_field(net->mib.tcp_statistics,
 415                                                    snmp4_tcp_list[i].entry));
 416         }
 417
 418         seq_puts(seq, "\nUdp:");
 419         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
 420                 seq_printf(seq, " %s", snmp4_udp_list[i].name);
 421
 422         seq_puts(seq, "\nUdp:");
 423         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
 424                 seq_printf(seq, " %lu",
 425                            snmp_fold_field(net->mib.udp_statistics,
 426                                            snmp4_udp_list[i].entry));
 427
 428         /* the UDP and UDP-Lite MIBs are the same */
 429         seq_puts(seq, "\nUdpLite:");
 430         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
 431                 seq_printf(seq, " %s", snmp4_udp_list[i].name);
 432
 433         seq_puts(seq, "\nUdpLite:");
 434         for (i = 0; snmp4_udp_list[i].name != NULL; i++)
 435                 seq_printf(seq, " %lu",
 436                            snmp_fold_field(net->mib.udplite_statistics,
 437                                            snmp4_udp_list[i].entry));
 438
 439         seq_putc(seq, '\n');
 440         return 0;
 441 }
 442
 443 static int snmp_seq_open(struct inode *inode, struct file *file)
 444 {
 445         return single_open_net(inode, file, snmp_seq_show);
 446 }
 447
 448 static const struct file_operations snmp_seq_fops = {
 449         .owner   = THIS_MODULE,
 450         .open    = snmp_seq_open,
 451         .read    = seq_read,
 452         .llseek  = seq_lseek,
 453         .release = single_release_net,
 454 };
 455
 456
 457
 458 /*
 459  *      Output /proc/net/netstat
 460  */
 461 static int netstat_seq_show(struct seq_file *seq, void *v)
 462 {
 463         int i;
 464         struct net *net = seq->private;
 465
 466         seq_puts(seq, "TcpExt:");
 467         for (i = 0; snmp4_net_list[i].name != NULL; i++)
 468                 seq_printf(seq, " %s", snmp4_net_list[i].name);
 469
 470         seq_puts(seq, "\nTcpExt:");
 471         for (i = 0; snmp4_net_list[i].name != NULL; i++)
 472                 seq_printf(seq, " %lu",
 473                            snmp_fold_field(net->mib.net_statistics,
 474                                            snmp4_net_list[i].entry));
 475
 476         seq_puts(seq, "\nIpExt:");
 477         for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
 478                 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
 479
 480         seq_puts(seq, "\nIpExt:");
 481         for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
 482                 seq_printf(seq, " %llu",
 483                            snmp_fold_field64(net->mib.ip_statistics,
 484                                              snmp4_ipextstats_list[i].entry,
 485                                              offsetof(struct ipstats_mib, syncp)));
 486
 487         seq_putc(seq, '\n');
 488         return 0;
 489 }
 490
 491 static int netstat_seq_open(struct inode *inode, struct file *file)
 492 {
 493         return single_open_net(inode, file, netstat_seq_show);
 494 }
 495
 496 static const struct file_operations netstat_seq_fops = {
 497         .owner   = THIS_MODULE,
 498         .open    = netstat_seq_open,
 499         .read    = seq_read,
 500         .llseek  = seq_lseek,
 501         .release = single_release_net,
 502 };
 503
 504 static __net_init int ip_proc_init_net(struct net *net)
 505 {
 506         if (!proc_create("sockstat", S_IRUGO, net->proc_net,
 507                          &sockstat_seq_fops))
 508                 goto out_sockstat;
 509         if (!proc_create("netstat", S_IRUGO, net->proc_net, &netstat_seq_fops))
 510                 goto out_netstat;
 511         if (!proc_create("snmp", S_IRUGO, net->proc_net, &snmp_seq_fops))
 512                 goto out_snmp;
 513
 514         return 0;
 515
 516 out_snmp:
 517         remove_proc_entry("netstat", net->proc_net);
 518 out_netstat:
 519         remove_proc_entry("sockstat", net->proc_net);
 520 out_sockstat:
 521         return -ENOMEM;
 522 }
 523
 524 static __net_exit void ip_proc_exit_net(struct net *net)
 525 {
 526         remove_proc_entry("snmp", net->proc_net);
 527         remove_proc_entry("netstat", net->proc_net);
 528         remove_proc_entry("sockstat", net->proc_net);
 529 }
 530
 531 static __net_initdata struct pernet_operations ip_proc_ops = {
 532         .init = ip_proc_init_net,
 533         .exit = ip_proc_exit_net,
 534 };
 535
 536 int __init ip_misc_proc_init(void)
 537 {
 538         return register_pernet_subsys(&ip_proc_ops);
 539 }
 540