1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * INET An implementation of the TCP/IP protocol suite for the LINUX 4 * operating system. INET is implemented using the BSD Socket 5 * interface as the means of communication with the user level. 6 * 7 * This file implements the various access functions for the 8 * PROC file system. It is mainly used for debugging and 9 * statistics. 10 * 11 * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 12 * Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de> 13 * Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de> 14 * Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de> 15 * 16 * Fixes: 17 * Alan Cox : UDP sockets show the rxqueue/txqueue 18 * using hint flag for the netinfo. 19 * Pauline Middelink : identd support 20 * Alan Cox : Make /proc safer. 21 * Erik Schoenfelder : /proc/net/snmp 22 * Alan Cox : Handle dead sockets properly. 23 * Gerhard Koerting : Show both timers 24 * Alan Cox : Allow inode to be NULL (kernel socket) 25 * Andi Kleen : Add support for open_requests and 26 * split functions for more readibility. 27 * Andi Kleen : Add support for /proc/net/netstat 28 * Arnaldo C. Melo : Convert to seq_file 29 */ 30 #include <linux/types.h> 31 #include <net/net_namespace.h> 32 #include <net/icmp.h> 33 #include <net/protocol.h> 34 #include <net/tcp.h> 35 #include <net/mptcp.h> 36 #include <net/udp.h> 37 #include <net/udplite.h> 38 #include <linux/bottom_half.h> 39 #include <linux/inetdevice.h> 40 #include <linux/proc_fs.h> 41 #include <linux/seq_file.h> 42 #include <linux/export.h> 43 #include <net/sock.h> 44 #include <net/raw.h> 45 46 #define TCPUDP_MIB_MAX max_t(u32, UDP_MIB_MAX, TCP_MIB_MAX) 47 48 /* 49 * Report socket allocation statistics [mea@utu.fi] 50 */ 51 static int sockstat_seq_show(struct seq_file *seq, void *v) 52 { 53 struct net *net = seq->private; 54 int orphans, sockets; 55 56 orphans = percpu_counter_sum_positive(&tcp_orphan_count); 57 sockets = proto_sockets_allocated_sum_positive(&tcp_prot); 58 59 socket_seq_show(seq); 60 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n", 61 sock_prot_inuse_get(net, &tcp_prot), orphans, 62 atomic_read(&net->ipv4.tcp_death_row.tw_count), sockets, 63 proto_memory_allocated(&tcp_prot)); 64 seq_printf(seq, "UDP: inuse %d mem %ld\n", 65 sock_prot_inuse_get(net, &udp_prot), 66 proto_memory_allocated(&udp_prot)); 67 seq_printf(seq, "UDPLITE: inuse %d\n", 68 sock_prot_inuse_get(net, &udplite_prot)); 69 seq_printf(seq, "RAW: inuse %d\n", 70 sock_prot_inuse_get(net, &raw_prot)); 71 seq_printf(seq, "FRAG: inuse %u memory %lu\n", 72 atomic_read(&net->ipv4.fqdir->rhashtable.nelems), 73 frag_mem_limit(net->ipv4.fqdir)); 74 return 0; 75 } 76 77 /* snmp items */ 78 static const struct snmp_mib snmp4_ipstats_list[] = { 79 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS), 80 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS), 81 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS), 82 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 83 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 84 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS), 85 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS), 86 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS), 87 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS), 88 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 89 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 90 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS), 91 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS), 92 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS), 93 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS), 94 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS), 95 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES), 96 SNMP_MIB_SENTINEL 97 }; 98 99 /* Following items are displayed in /proc/net/netstat */ 100 static const struct snmp_mib snmp4_ipextstats_list[] = { 101 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES), 102 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 103 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 104 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 105 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS), 106 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS), 107 SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS), 108 SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS), 109 SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS), 110 SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS), 111 SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS), 112 SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS), 113 /* Non RFC4293 fields */ 114 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS), 115 SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS), 116 SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS), 117 SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS), 118 SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS), 119 SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS), 120 SNMP_MIB_SENTINEL 121 }; 122 123 static const struct { 124 const char *name; 125 int index; 126 } icmpmibmap[] = { 127 { "DestUnreachs", ICMP_DEST_UNREACH }, 128 { "TimeExcds", ICMP_TIME_EXCEEDED }, 129 { "ParmProbs", ICMP_PARAMETERPROB }, 130 { "SrcQuenchs", ICMP_SOURCE_QUENCH }, 131 { "Redirects", ICMP_REDIRECT }, 132 { "Echos", ICMP_ECHO }, 133 { "EchoReps", ICMP_ECHOREPLY }, 134 { "Timestamps", ICMP_TIMESTAMP }, 135 { "TimestampReps", ICMP_TIMESTAMPREPLY }, 136 { "AddrMasks", ICMP_ADDRESS }, 137 { "AddrMaskReps", ICMP_ADDRESSREPLY }, 138 { NULL, 0 } 139 }; 140 141 142 static const struct snmp_mib snmp4_tcp_list[] = { 143 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM), 144 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN), 145 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX), 146 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN), 147 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS), 148 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS), 149 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS), 150 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS), 151 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB), 152 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS), 153 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS), 154 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS), 155 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS), 156 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS), 157 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS), 158 SNMP_MIB_SENTINEL 159 }; 160 161 static 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_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS), 169 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI), 170 SNMP_MIB_SENTINEL 171 }; 172 173 static const struct snmp_mib snmp4_net_list[] = { 174 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), 175 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), 176 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), 177 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), 178 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), 179 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), 180 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), 181 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), 182 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), 183 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), 184 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), 185 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), 186 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), 187 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), 188 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), 189 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), 190 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), 191 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), 192 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), 193 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), 194 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), 195 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), 196 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), 197 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), 198 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), 199 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), 200 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), 201 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), 202 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), 203 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), 204 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), 205 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), 206 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), 207 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), 208 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), 209 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), 210 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), 211 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), 212 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), 213 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), 214 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES), 215 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY), 216 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), 217 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), 218 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), 219 SNMP_MIB_ITEM("TCPBacklogCoalesce", LINUX_MIB_TCPBACKLOGCOALESCE), 220 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 221 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 222 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 223 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 224 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), 225 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), 226 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), 227 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), 228 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), 229 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), 230 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), 231 SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO), 232 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), 233 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), 234 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), 235 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), 236 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND), 237 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED), 238 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE), 239 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED), 240 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED), 241 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK), 242 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP), 243 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP), 244 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP), 245 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP), 246 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER), 247 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW), 248 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES), 249 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP), 250 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL), 251 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE), 252 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE), 253 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP), 254 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE), 255 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK), 256 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE), 257 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE), 258 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL), 259 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE), 260 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL), 261 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW), 262 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD), 263 SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE), 264 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES), 265 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS), 266 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING), 267 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV), 268 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV), 269 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV), 270 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS), 271 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT), 272 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT), 273 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND), 274 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT), 275 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND), 276 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV), 277 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS), 278 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ), 279 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2), 280 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT), 281 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE), 282 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE), 283 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE), 284 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL), 285 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS), 286 SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED), 287 SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE), 288 SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED), 289 SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP), 290 SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP), 291 SNMP_MIB_ITEM("TCPWqueueTooBig", LINUX_MIB_TCPWQUEUETOOBIG), 292 SNMP_MIB_ITEM("TCPFastOpenPassiveAltKey", LINUX_MIB_TCPFASTOPENPASSIVEALTKEY), 293 SNMP_MIB_ITEM("TcpTimeoutRehash", LINUX_MIB_TCPTIMEOUTREHASH), 294 SNMP_MIB_ITEM("TcpDuplicateDataRehash", LINUX_MIB_TCPDUPLICATEDATAREHASH), 295 SNMP_MIB_ITEM("TCPDSACKRecvSegs", LINUX_MIB_TCPDSACKRECVSEGS), 296 SNMP_MIB_ITEM("TCPDSACKIgnoredDubious", LINUX_MIB_TCPDSACKIGNOREDDUBIOUS), 297 SNMP_MIB_SENTINEL 298 }; 299 300 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals, 301 unsigned short *type, int count) 302 { 303 int j; 304 305 if (count) { 306 seq_puts(seq, "\nIcmpMsg:"); 307 for (j = 0; j < count; ++j) 308 seq_printf(seq, " %sType%u", 309 type[j] & 0x100 ? "Out" : "In", 310 type[j] & 0xff); 311 seq_puts(seq, "\nIcmpMsg:"); 312 for (j = 0; j < count; ++j) 313 seq_printf(seq, " %lu", vals[j]); 314 } 315 } 316 317 static void icmpmsg_put(struct seq_file *seq) 318 { 319 #define PERLINE 16 320 321 int i, count; 322 unsigned short type[PERLINE]; 323 unsigned long vals[PERLINE], val; 324 struct net *net = seq->private; 325 326 count = 0; 327 for (i = 0; i < ICMPMSG_MIB_MAX; i++) { 328 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]); 329 if (val) { 330 type[count] = i; 331 vals[count++] = val; 332 } 333 if (count == PERLINE) { 334 icmpmsg_put_line(seq, vals, type, count); 335 count = 0; 336 } 337 } 338 icmpmsg_put_line(seq, vals, type, count); 339 340 #undef PERLINE 341 } 342 343 static void icmp_put(struct seq_file *seq) 344 { 345 int i; 346 struct net *net = seq->private; 347 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs; 348 349 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors"); 350 for (i = 0; icmpmibmap[i].name; i++) 351 seq_printf(seq, " In%s", icmpmibmap[i].name); 352 seq_puts(seq, " OutMsgs OutErrors"); 353 for (i = 0; icmpmibmap[i].name; i++) 354 seq_printf(seq, " Out%s", icmpmibmap[i].name); 355 seq_printf(seq, "\nIcmp: %lu %lu %lu", 356 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS), 357 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS), 358 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS)); 359 for (i = 0; icmpmibmap[i].name; i++) 360 seq_printf(seq, " %lu", 361 atomic_long_read(ptr + icmpmibmap[i].index)); 362 seq_printf(seq, " %lu %lu", 363 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS), 364 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS)); 365 for (i = 0; icmpmibmap[i].name; i++) 366 seq_printf(seq, " %lu", 367 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100))); 368 } 369 370 /* 371 * Called from the PROCfs module. This outputs /proc/net/snmp. 372 */ 373 static int snmp_seq_show_ipstats(struct seq_file *seq, void *v) 374 { 375 struct net *net = seq->private; 376 u64 buff64[IPSTATS_MIB_MAX]; 377 int i; 378 379 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64)); 380 381 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 382 for (i = 0; snmp4_ipstats_list[i].name; i++) 383 seq_printf(seq, " %s", snmp4_ipstats_list[i].name); 384 385 seq_printf(seq, "\nIp: %d %d", 386 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2, 387 net->ipv4.sysctl_ip_default_ttl); 388 389 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0); 390 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list, 391 net->mib.ip_statistics, 392 offsetof(struct ipstats_mib, syncp)); 393 for (i = 0; snmp4_ipstats_list[i].name; i++) 394 seq_printf(seq, " %llu", buff64[i]); 395 396 return 0; 397 } 398 399 static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v) 400 { 401 unsigned long buff[TCPUDP_MIB_MAX]; 402 struct net *net = seq->private; 403 int i; 404 405 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 406 407 seq_puts(seq, "\nTcp:"); 408 for (i = 0; snmp4_tcp_list[i].name; i++) 409 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 410 411 seq_puts(seq, "\nTcp:"); 412 snmp_get_cpu_field_batch(buff, snmp4_tcp_list, 413 net->mib.tcp_statistics); 414 for (i = 0; snmp4_tcp_list[i].name; i++) { 415 /* MaxConn field is signed, RFC 2012 */ 416 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 417 seq_printf(seq, " %ld", buff[i]); 418 else 419 seq_printf(seq, " %lu", buff[i]); 420 } 421 422 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 423 424 snmp_get_cpu_field_batch(buff, snmp4_udp_list, 425 net->mib.udp_statistics); 426 seq_puts(seq, "\nUdp:"); 427 for (i = 0; snmp4_udp_list[i].name; i++) 428 seq_printf(seq, " %s", snmp4_udp_list[i].name); 429 seq_puts(seq, "\nUdp:"); 430 for (i = 0; snmp4_udp_list[i].name; i++) 431 seq_printf(seq, " %lu", buff[i]); 432 433 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 434 435 /* the UDP and UDP-Lite MIBs are the same */ 436 seq_puts(seq, "\nUdpLite:"); 437 snmp_get_cpu_field_batch(buff, snmp4_udp_list, 438 net->mib.udplite_statistics); 439 for (i = 0; snmp4_udp_list[i].name; i++) 440 seq_printf(seq, " %s", snmp4_udp_list[i].name); 441 seq_puts(seq, "\nUdpLite:"); 442 for (i = 0; snmp4_udp_list[i].name; i++) 443 seq_printf(seq, " %lu", buff[i]); 444 445 seq_putc(seq, '\n'); 446 return 0; 447 } 448 449 static int snmp_seq_show(struct seq_file *seq, void *v) 450 { 451 snmp_seq_show_ipstats(seq, v); 452 453 icmp_put(seq); /* RFC 2011 compatibility */ 454 icmpmsg_put(seq); 455 456 snmp_seq_show_tcp_udp(seq, v); 457 458 return 0; 459 } 460 461 /* 462 * Output /proc/net/netstat 463 */ 464 static int netstat_seq_show(struct seq_file *seq, void *v) 465 { 466 int i; 467 struct net *net = seq->private; 468 469 seq_puts(seq, "TcpExt:"); 470 for (i = 0; snmp4_net_list[i].name; i++) 471 seq_printf(seq, " %s", snmp4_net_list[i].name); 472 473 seq_puts(seq, "\nTcpExt:"); 474 for (i = 0; snmp4_net_list[i].name; i++) 475 seq_printf(seq, " %lu", 476 snmp_fold_field(net->mib.net_statistics, 477 snmp4_net_list[i].entry)); 478 479 seq_puts(seq, "\nIpExt:"); 480 for (i = 0; snmp4_ipextstats_list[i].name; i++) 481 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); 482 483 seq_puts(seq, "\nIpExt:"); 484 for (i = 0; snmp4_ipextstats_list[i].name; i++) 485 seq_printf(seq, " %llu", 486 snmp_fold_field64(net->mib.ip_statistics, 487 snmp4_ipextstats_list[i].entry, 488 offsetof(struct ipstats_mib, syncp))); 489 490 seq_putc(seq, '\n'); 491 mptcp_seq_show(seq); 492 return 0; 493 } 494 495 static __net_init int ip_proc_init_net(struct net *net) 496 { 497 if (!proc_create_net_single("sockstat", 0444, net->proc_net, 498 sockstat_seq_show, NULL)) 499 goto out_sockstat; 500 if (!proc_create_net_single("netstat", 0444, net->proc_net, 501 netstat_seq_show, NULL)) 502 goto out_netstat; 503 if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show, 504 NULL)) 505 goto out_snmp; 506 507 return 0; 508 509 out_snmp: 510 remove_proc_entry("netstat", net->proc_net); 511 out_netstat: 512 remove_proc_entry("sockstat", net->proc_net); 513 out_sockstat: 514 return -ENOMEM; 515 } 516 517 static __net_exit void ip_proc_exit_net(struct net *net) 518 { 519 remove_proc_entry("snmp", net->proc_net); 520 remove_proc_entry("netstat", net->proc_net); 521 remove_proc_entry("sockstat", net->proc_net); 522 } 523 524 static __net_initdata struct pernet_operations ip_proc_ops = { 525 .init = ip_proc_init_net, 526 .exit = ip_proc_exit_net, 527 }; 528 529 int __init ip_misc_proc_init(void) 530 { 531 return register_pernet_subsys(&ip_proc_ops); 532 } 533