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_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_ITEM("MemErrors", UDP_MIB_MEMERRORS), 171 SNMP_MIB_SENTINEL 172 }; 173 174 static const struct snmp_mib snmp4_net_list[] = { 175 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), 176 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), 177 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), 178 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), 179 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), 180 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), 181 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), 182 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), 183 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), 184 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), 185 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), 186 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), 187 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), 188 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), 189 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), 190 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), 191 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), 192 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), 193 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), 194 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), 195 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), 196 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), 197 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), 198 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), 199 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), 200 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), 201 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), 202 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), 203 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), 204 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), 205 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), 206 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), 207 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), 208 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), 209 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), 210 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), 211 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), 212 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), 213 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), 214 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), 215 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES), 216 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY), 217 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), 218 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), 219 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), 220 SNMP_MIB_ITEM("TCPBacklogCoalesce", LINUX_MIB_TCPBACKLOGCOALESCE), 221 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 222 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 223 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 224 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 225 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), 226 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), 227 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), 228 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), 229 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), 230 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), 231 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), 232 SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO), 233 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), 234 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), 235 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), 236 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), 237 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND), 238 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED), 239 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE), 240 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED), 241 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED), 242 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK), 243 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP), 244 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP), 245 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP), 246 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP), 247 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER), 248 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW), 249 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES), 250 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP), 251 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL), 252 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE), 253 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE), 254 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP), 255 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE), 256 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK), 257 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE), 258 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE), 259 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL), 260 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE), 261 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL), 262 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW), 263 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD), 264 SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE), 265 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES), 266 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS), 267 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING), 268 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV), 269 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV), 270 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV), 271 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS), 272 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT), 273 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT), 274 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND), 275 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT), 276 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND), 277 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV), 278 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS), 279 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ), 280 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2), 281 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT), 282 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE), 283 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE), 284 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE), 285 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL), 286 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS), 287 SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED), 288 SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE), 289 SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED), 290 SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP), 291 SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP), 292 SNMP_MIB_ITEM("TCPWqueueTooBig", LINUX_MIB_TCPWQUEUETOOBIG), 293 SNMP_MIB_ITEM("TCPFastOpenPassiveAltKey", LINUX_MIB_TCPFASTOPENPASSIVEALTKEY), 294 SNMP_MIB_ITEM("TcpTimeoutRehash", LINUX_MIB_TCPTIMEOUTREHASH), 295 SNMP_MIB_ITEM("TcpDuplicateDataRehash", LINUX_MIB_TCPDUPLICATEDATAREHASH), 296 SNMP_MIB_ITEM("TCPDSACKRecvSegs", LINUX_MIB_TCPDSACKRECVSEGS), 297 SNMP_MIB_ITEM("TCPDSACKIgnoredDubious", LINUX_MIB_TCPDSACKIGNOREDDUBIOUS), 298 SNMP_MIB_ITEM("TCPMigrateReqSuccess", LINUX_MIB_TCPMIGRATEREQSUCCESS), 299 SNMP_MIB_ITEM("TCPMigrateReqFailure", LINUX_MIB_TCPMIGRATEREQFAILURE), 300 SNMP_MIB_ITEM("TCPPLBRehash", LINUX_MIB_TCPPLBREHASH), 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; i++) 355 seq_printf(seq, " In%s", icmpmibmap[i].name); 356 seq_puts(seq, " OutMsgs OutErrors OutRateLimitGlobal OutRateLimitHost"); 357 for (i = 0; icmpmibmap[i].name; 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; i++) 364 seq_printf(seq, " %lu", 365 atomic_long_read(ptr + icmpmibmap[i].index)); 366 seq_printf(seq, " %lu %lu %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 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_RATELIMITGLOBAL), 370 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_RATELIMITHOST)); 371 for (i = 0; icmpmibmap[i].name; i++) 372 seq_printf(seq, " %lu", 373 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100))); 374 } 375 376 /* 377 * Called from the PROCfs module. This outputs /proc/net/snmp. 378 */ 379 static int snmp_seq_show_ipstats(struct seq_file *seq, void *v) 380 { 381 struct net *net = seq->private; 382 u64 buff64[IPSTATS_MIB_MAX]; 383 int i; 384 385 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64)); 386 387 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 388 for (i = 0; snmp4_ipstats_list[i].name; i++) 389 seq_printf(seq, " %s", snmp4_ipstats_list[i].name); 390 391 seq_printf(seq, "\nIp: %d %d", 392 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2, 393 READ_ONCE(net->ipv4.sysctl_ip_default_ttl)); 394 395 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0); 396 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list, 397 net->mib.ip_statistics, 398 offsetof(struct ipstats_mib, syncp)); 399 for (i = 0; snmp4_ipstats_list[i].name; i++) 400 seq_printf(seq, " %llu", buff64[i]); 401 402 return 0; 403 } 404 405 static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v) 406 { 407 unsigned long buff[TCPUDP_MIB_MAX]; 408 struct net *net = seq->private; 409 int i; 410 411 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 412 413 seq_puts(seq, "\nTcp:"); 414 for (i = 0; snmp4_tcp_list[i].name; i++) 415 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 416 417 seq_puts(seq, "\nTcp:"); 418 snmp_get_cpu_field_batch(buff, snmp4_tcp_list, 419 net->mib.tcp_statistics); 420 for (i = 0; snmp4_tcp_list[i].name; i++) { 421 /* MaxConn field is signed, RFC 2012 */ 422 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 423 seq_printf(seq, " %ld", buff[i]); 424 else 425 seq_printf(seq, " %lu", buff[i]); 426 } 427 428 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 429 430 snmp_get_cpu_field_batch(buff, snmp4_udp_list, 431 net->mib.udp_statistics); 432 seq_puts(seq, "\nUdp:"); 433 for (i = 0; snmp4_udp_list[i].name; i++) 434 seq_printf(seq, " %s", snmp4_udp_list[i].name); 435 seq_puts(seq, "\nUdp:"); 436 for (i = 0; snmp4_udp_list[i].name; i++) 437 seq_printf(seq, " %lu", buff[i]); 438 439 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 440 441 /* the UDP and UDP-Lite MIBs are the same */ 442 seq_puts(seq, "\nUdpLite:"); 443 snmp_get_cpu_field_batch(buff, snmp4_udp_list, 444 net->mib.udplite_statistics); 445 for (i = 0; snmp4_udp_list[i].name; i++) 446 seq_printf(seq, " %s", snmp4_udp_list[i].name); 447 seq_puts(seq, "\nUdpLite:"); 448 for (i = 0; snmp4_udp_list[i].name; i++) 449 seq_printf(seq, " %lu", buff[i]); 450 451 seq_putc(seq, '\n'); 452 return 0; 453 } 454 455 static int snmp_seq_show(struct seq_file *seq, void *v) 456 { 457 snmp_seq_show_ipstats(seq, v); 458 459 icmp_put(seq); /* RFC 2011 compatibility */ 460 icmpmsg_put(seq); 461 462 snmp_seq_show_tcp_udp(seq, v); 463 464 return 0; 465 } 466 467 /* 468 * Output /proc/net/netstat 469 */ 470 static int netstat_seq_show(struct seq_file *seq, void *v) 471 { 472 const int ip_cnt = ARRAY_SIZE(snmp4_ipextstats_list) - 1; 473 const int tcp_cnt = ARRAY_SIZE(snmp4_net_list) - 1; 474 struct net *net = seq->private; 475 unsigned long *buff; 476 int i; 477 478 seq_puts(seq, "TcpExt:"); 479 for (i = 0; i < tcp_cnt; i++) 480 seq_printf(seq, " %s", snmp4_net_list[i].name); 481 482 seq_puts(seq, "\nTcpExt:"); 483 buff = kzalloc(max(tcp_cnt * sizeof(long), ip_cnt * sizeof(u64)), 484 GFP_KERNEL); 485 if (buff) { 486 snmp_get_cpu_field_batch(buff, snmp4_net_list, 487 net->mib.net_statistics); 488 for (i = 0; i < tcp_cnt; i++) 489 seq_printf(seq, " %lu", buff[i]); 490 } else { 491 for (i = 0; i < tcp_cnt; i++) 492 seq_printf(seq, " %lu", 493 snmp_fold_field(net->mib.net_statistics, 494 snmp4_net_list[i].entry)); 495 } 496 seq_puts(seq, "\nIpExt:"); 497 for (i = 0; i < ip_cnt; i++) 498 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); 499 500 seq_puts(seq, "\nIpExt:"); 501 if (buff) { 502 u64 *buff64 = (u64 *)buff; 503 504 memset(buff64, 0, ip_cnt * sizeof(u64)); 505 snmp_get_cpu_field64_batch(buff64, snmp4_ipextstats_list, 506 net->mib.ip_statistics, 507 offsetof(struct ipstats_mib, syncp)); 508 for (i = 0; i < ip_cnt; i++) 509 seq_printf(seq, " %llu", buff64[i]); 510 } else { 511 for (i = 0; i < ip_cnt; i++) 512 seq_printf(seq, " %llu", 513 snmp_fold_field64(net->mib.ip_statistics, 514 snmp4_ipextstats_list[i].entry, 515 offsetof(struct ipstats_mib, syncp))); 516 } 517 kfree(buff); 518 seq_putc(seq, '\n'); 519 mptcp_seq_show(seq); 520 return 0; 521 } 522 523 static __net_init int ip_proc_init_net(struct net *net) 524 { 525 if (!proc_create_net_single("sockstat", 0444, net->proc_net, 526 sockstat_seq_show, NULL)) 527 goto out_sockstat; 528 if (!proc_create_net_single("netstat", 0444, net->proc_net, 529 netstat_seq_show, NULL)) 530 goto out_netstat; 531 if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show, 532 NULL)) 533 goto out_snmp; 534 535 return 0; 536 537 out_snmp: 538 remove_proc_entry("netstat", net->proc_net); 539 out_netstat: 540 remove_proc_entry("sockstat", net->proc_net); 541 out_sockstat: 542 return -ENOMEM; 543 } 544 545 static __net_exit void ip_proc_exit_net(struct net *net) 546 { 547 remove_proc_entry("snmp", net->proc_net); 548 remove_proc_entry("netstat", net->proc_net); 549 remove_proc_entry("sockstat", net->proc_net); 550 } 551 552 static __net_initdata struct pernet_operations ip_proc_ops = { 553 .init = ip_proc_init_net, 554 .exit = ip_proc_exit_net, 555 }; 556 557 int __init ip_misc_proc_init(void) 558 { 559 return register_pernet_subsys(&ip_proc_ops); 560 } 561