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 = tcp_orphan_count_sum(); 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 refcount_read(&net->ipv4.tcp_death_row.tw_refcount) - 1, 63 sockets, 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_OUTREQUESTS), 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_ITEM("OutTransmits", IPSTATS_MIB_OUTPKTS), 97 SNMP_MIB_SENTINEL 98 }; 99 100 /* Following items are displayed in /proc/net/netstat */ 101 static const struct snmp_mib snmp4_ipextstats_list[] = { 102 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES), 103 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 104 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 105 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 106 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS), 107 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS), 108 SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS), 109 SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS), 110 SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS), 111 SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS), 112 SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS), 113 SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS), 114 /* Non RFC4293 fields */ 115 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS), 116 SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS), 117 SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS), 118 SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS), 119 SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS), 120 SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS), 121 SNMP_MIB_SENTINEL 122 }; 123 124 static const struct { 125 const 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 }; 141 142 143 static 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_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS), 159 SNMP_MIB_SENTINEL 160 }; 161 162 static const struct snmp_mib snmp4_udp_list[] = { 163 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS), 164 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS), 165 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS), 166 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS), 167 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS), 168 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS), 169 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS), 170 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI), 171 SNMP_MIB_ITEM("MemErrors", UDP_MIB_MEMERRORS), 172 SNMP_MIB_SENTINEL 173 }; 174 175 static const struct snmp_mib snmp4_net_list[] = { 176 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), 177 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), 178 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), 179 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), 180 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), 181 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), 182 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), 183 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), 184 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), 185 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), 186 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), 187 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), 188 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), 189 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), 190 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), 191 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), 192 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), 193 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), 194 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), 195 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), 196 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), 197 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), 198 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), 199 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), 200 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), 201 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), 202 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), 203 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), 204 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), 205 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), 206 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), 207 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), 208 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), 209 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), 210 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), 211 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), 212 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), 213 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), 214 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), 215 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), 216 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES), 217 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY), 218 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), 219 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), 220 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), 221 SNMP_MIB_ITEM("TCPBacklogCoalesce", LINUX_MIB_TCPBACKLOGCOALESCE), 222 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 223 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 224 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 225 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 226 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), 227 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), 228 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), 229 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), 230 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), 231 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), 232 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), 233 SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO), 234 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), 235 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), 236 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), 237 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), 238 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND), 239 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED), 240 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE), 241 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED), 242 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED), 243 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK), 244 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP), 245 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP), 246 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP), 247 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP), 248 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER), 249 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW), 250 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES), 251 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP), 252 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL), 253 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE), 254 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE), 255 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP), 256 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE), 257 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK), 258 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE), 259 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE), 260 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL), 261 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE), 262 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL), 263 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW), 264 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD), 265 SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE), 266 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES), 267 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS), 268 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING), 269 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV), 270 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV), 271 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV), 272 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS), 273 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT), 274 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT), 275 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND), 276 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT), 277 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND), 278 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV), 279 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS), 280 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ), 281 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2), 282 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT), 283 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE), 284 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE), 285 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE), 286 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL), 287 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS), 288 SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED), 289 SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE), 290 SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED), 291 SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP), 292 SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP), 293 SNMP_MIB_ITEM("TCPWqueueTooBig", LINUX_MIB_TCPWQUEUETOOBIG), 294 SNMP_MIB_ITEM("TCPFastOpenPassiveAltKey", LINUX_MIB_TCPFASTOPENPASSIVEALTKEY), 295 SNMP_MIB_ITEM("TcpTimeoutRehash", LINUX_MIB_TCPTIMEOUTREHASH), 296 SNMP_MIB_ITEM("TcpDuplicateDataRehash", LINUX_MIB_TCPDUPLICATEDATAREHASH), 297 SNMP_MIB_ITEM("TCPDSACKRecvSegs", LINUX_MIB_TCPDSACKRECVSEGS), 298 SNMP_MIB_ITEM("TCPDSACKIgnoredDubious", LINUX_MIB_TCPDSACKIGNOREDDUBIOUS), 299 SNMP_MIB_ITEM("TCPMigrateReqSuccess", LINUX_MIB_TCPMIGRATEREQSUCCESS), 300 SNMP_MIB_ITEM("TCPMigrateReqFailure", LINUX_MIB_TCPMIGRATEREQFAILURE), 301 SNMP_MIB_ITEM("TCPPLBRehash", LINUX_MIB_TCPPLBREHASH), 302 SNMP_MIB_SENTINEL 303 }; 304 305 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals, 306 unsigned short *type, int count) 307 { 308 int j; 309 310 if (count) { 311 seq_puts(seq, "\nIcmpMsg:"); 312 for (j = 0; j < count; ++j) 313 seq_printf(seq, " %sType%u", 314 type[j] & 0x100 ? "Out" : "In", 315 type[j] & 0xff); 316 seq_puts(seq, "\nIcmpMsg:"); 317 for (j = 0; j < count; ++j) 318 seq_printf(seq, " %lu", vals[j]); 319 } 320 } 321 322 static void icmpmsg_put(struct seq_file *seq) 323 { 324 #define PERLINE 16 325 326 int i, count; 327 unsigned short type[PERLINE]; 328 unsigned long vals[PERLINE], val; 329 struct net *net = seq->private; 330 331 count = 0; 332 for (i = 0; i < ICMPMSG_MIB_MAX; i++) { 333 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]); 334 if (val) { 335 type[count] = i; 336 vals[count++] = val; 337 } 338 if (count == PERLINE) { 339 icmpmsg_put_line(seq, vals, type, count); 340 count = 0; 341 } 342 } 343 icmpmsg_put_line(seq, vals, type, count); 344 345 #undef PERLINE 346 } 347 348 static void icmp_put(struct seq_file *seq) 349 { 350 int i; 351 struct net *net = seq->private; 352 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs; 353 354 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors"); 355 for (i = 0; icmpmibmap[i].name; i++) 356 seq_printf(seq, " In%s", icmpmibmap[i].name); 357 seq_puts(seq, " OutMsgs OutErrors OutRateLimitGlobal OutRateLimitHost"); 358 for (i = 0; icmpmibmap[i].name; i++) 359 seq_printf(seq, " Out%s", icmpmibmap[i].name); 360 seq_printf(seq, "\nIcmp: %lu %lu %lu", 361 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS), 362 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS), 363 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS)); 364 for (i = 0; icmpmibmap[i].name; i++) 365 seq_printf(seq, " %lu", 366 atomic_long_read(ptr + icmpmibmap[i].index)); 367 seq_printf(seq, " %lu %lu %lu %lu", 368 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS), 369 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS), 370 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_RATELIMITGLOBAL), 371 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_RATELIMITHOST)); 372 for (i = 0; icmpmibmap[i].name; i++) 373 seq_printf(seq, " %lu", 374 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100))); 375 } 376 377 /* 378 * Called from the PROCfs module. This outputs /proc/net/snmp. 379 */ 380 static int snmp_seq_show_ipstats(struct seq_file *seq, void *v) 381 { 382 struct net *net = seq->private; 383 u64 buff64[IPSTATS_MIB_MAX]; 384 int i; 385 386 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64)); 387 388 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 389 for (i = 0; snmp4_ipstats_list[i].name; i++) 390 seq_printf(seq, " %s", snmp4_ipstats_list[i].name); 391 392 seq_printf(seq, "\nIp: %d %d", 393 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2, 394 READ_ONCE(net->ipv4.sysctl_ip_default_ttl)); 395 396 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0); 397 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list, 398 net->mib.ip_statistics, 399 offsetof(struct ipstats_mib, syncp)); 400 for (i = 0; snmp4_ipstats_list[i].name; i++) 401 seq_printf(seq, " %llu", buff64[i]); 402 403 return 0; 404 } 405 406 static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v) 407 { 408 unsigned long buff[TCPUDP_MIB_MAX]; 409 struct net *net = seq->private; 410 int i; 411 412 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 413 414 seq_puts(seq, "\nTcp:"); 415 for (i = 0; snmp4_tcp_list[i].name; i++) 416 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 417 418 seq_puts(seq, "\nTcp:"); 419 snmp_get_cpu_field_batch(buff, snmp4_tcp_list, 420 net->mib.tcp_statistics); 421 for (i = 0; snmp4_tcp_list[i].name; i++) { 422 /* MaxConn field is signed, RFC 2012 */ 423 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 424 seq_printf(seq, " %ld", buff[i]); 425 else 426 seq_printf(seq, " %lu", buff[i]); 427 } 428 429 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 430 431 snmp_get_cpu_field_batch(buff, snmp4_udp_list, 432 net->mib.udp_statistics); 433 seq_puts(seq, "\nUdp:"); 434 for (i = 0; snmp4_udp_list[i].name; i++) 435 seq_printf(seq, " %s", snmp4_udp_list[i].name); 436 seq_puts(seq, "\nUdp:"); 437 for (i = 0; snmp4_udp_list[i].name; i++) 438 seq_printf(seq, " %lu", buff[i]); 439 440 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 441 442 /* the UDP and UDP-Lite MIBs are the same */ 443 seq_puts(seq, "\nUdpLite:"); 444 snmp_get_cpu_field_batch(buff, snmp4_udp_list, 445 net->mib.udplite_statistics); 446 for (i = 0; snmp4_udp_list[i].name; i++) 447 seq_printf(seq, " %s", snmp4_udp_list[i].name); 448 seq_puts(seq, "\nUdpLite:"); 449 for (i = 0; snmp4_udp_list[i].name; i++) 450 seq_printf(seq, " %lu", buff[i]); 451 452 seq_putc(seq, '\n'); 453 return 0; 454 } 455 456 static int snmp_seq_show(struct seq_file *seq, void *v) 457 { 458 snmp_seq_show_ipstats(seq, v); 459 460 icmp_put(seq); /* RFC 2011 compatibility */ 461 icmpmsg_put(seq); 462 463 snmp_seq_show_tcp_udp(seq, v); 464 465 return 0; 466 } 467 468 /* 469 * Output /proc/net/netstat 470 */ 471 static int netstat_seq_show(struct seq_file *seq, void *v) 472 { 473 const int ip_cnt = ARRAY_SIZE(snmp4_ipextstats_list) - 1; 474 const int tcp_cnt = ARRAY_SIZE(snmp4_net_list) - 1; 475 struct net *net = seq->private; 476 unsigned long *buff; 477 int i; 478 479 seq_puts(seq, "TcpExt:"); 480 for (i = 0; i < tcp_cnt; i++) 481 seq_printf(seq, " %s", snmp4_net_list[i].name); 482 483 seq_puts(seq, "\nTcpExt:"); 484 buff = kzalloc(max(tcp_cnt * sizeof(long), ip_cnt * sizeof(u64)), 485 GFP_KERNEL); 486 if (buff) { 487 snmp_get_cpu_field_batch(buff, snmp4_net_list, 488 net->mib.net_statistics); 489 for (i = 0; i < tcp_cnt; i++) 490 seq_printf(seq, " %lu", buff[i]); 491 } else { 492 for (i = 0; i < tcp_cnt; i++) 493 seq_printf(seq, " %lu", 494 snmp_fold_field(net->mib.net_statistics, 495 snmp4_net_list[i].entry)); 496 } 497 seq_puts(seq, "\nIpExt:"); 498 for (i = 0; i < ip_cnt; i++) 499 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); 500 501 seq_puts(seq, "\nIpExt:"); 502 if (buff) { 503 u64 *buff64 = (u64 *)buff; 504 505 memset(buff64, 0, ip_cnt * sizeof(u64)); 506 snmp_get_cpu_field64_batch(buff64, snmp4_ipextstats_list, 507 net->mib.ip_statistics, 508 offsetof(struct ipstats_mib, syncp)); 509 for (i = 0; i < ip_cnt; i++) 510 seq_printf(seq, " %llu", buff64[i]); 511 } else { 512 for (i = 0; i < ip_cnt; i++) 513 seq_printf(seq, " %llu", 514 snmp_fold_field64(net->mib.ip_statistics, 515 snmp4_ipextstats_list[i].entry, 516 offsetof(struct ipstats_mib, syncp))); 517 } 518 kfree(buff); 519 seq_putc(seq, '\n'); 520 mptcp_seq_show(seq); 521 return 0; 522 } 523 524 static __net_init int ip_proc_init_net(struct net *net) 525 { 526 if (!proc_create_net_single("sockstat", 0444, net->proc_net, 527 sockstat_seq_show, NULL)) 528 goto out_sockstat; 529 if (!proc_create_net_single("netstat", 0444, net->proc_net, 530 netstat_seq_show, NULL)) 531 goto out_netstat; 532 if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show, 533 NULL)) 534 goto out_snmp; 535 536 return 0; 537 538 out_snmp: 539 remove_proc_entry("netstat", net->proc_net); 540 out_netstat: 541 remove_proc_entry("sockstat", net->proc_net); 542 out_sockstat: 543 return -ENOMEM; 544 } 545 546 static __net_exit void ip_proc_exit_net(struct net *net) 547 { 548 remove_proc_entry("snmp", net->proc_net); 549 remove_proc_entry("netstat", net->proc_net); 550 remove_proc_entry("sockstat", net->proc_net); 551 } 552 553 static __net_initdata struct pernet_operations ip_proc_ops = { 554 .init = ip_proc_init_net, 555 .exit = ip_proc_exit_net, 556 }; 557 558 int __init ip_misc_proc_init(void) 559 { 560 return register_pernet_subsys(&ip_proc_ops); 561 } 562