| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * INET An implementation of the TCP/IP protocol suite for the LINUX |
| * operating system. INET is implemented using the BSD Socket |
| * interface as the means of communication with the user level. |
| * |
| * This file implements the various access functions for the |
| * PROC file system. It is mainly used for debugging and |
| * statistics. |
| * |
| * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| * Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de> |
| * Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de> |
| * Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de> |
| * |
| * Fixes: |
| * Alan Cox : UDP sockets show the rxqueue/txqueue |
| * using hint flag for the netinfo. |
| * Pauline Middelink : identd support |
| * Alan Cox : Make /proc safer. |
| * Erik Schoenfelder : /proc/net/snmp |
| * Alan Cox : Handle dead sockets properly. |
| * Gerhard Koerting : Show both timers |
| * Alan Cox : Allow inode to be NULL (kernel socket) |
| * Andi Kleen : Add support for open_requests and |
| * split functions for more readibility. |
| * Andi Kleen : Add support for /proc/net/netstat |
| * Arnaldo C. Melo : Convert to seq_file |
| */ |
| #include <linux/types.h> |
| #include <net/net_namespace.h> |
| #include <net/icmp.h> |
| #include <net/protocol.h> |
| #include <net/tcp.h> |
| #include <net/mptcp.h> |
| #include <net/udp.h> |
| #include <net/udplite.h> |
| #include <linux/bottom_half.h> |
| #include <linux/inetdevice.h> |
| #include <linux/proc_fs.h> |
| #include <linux/seq_file.h> |
| #include <linux/export.h> |
| #include <net/sock.h> |
| #include <net/raw.h> |
| |
| #define TCPUDP_MIB_MAX max_t(u32, UDP_MIB_MAX, TCP_MIB_MAX) |
| |
| /* |
| * Report socket allocation statistics [mea@utu.fi] |
| */ |
| static int sockstat_seq_show(struct seq_file *seq, void *v) |
| { |
| struct net *net = seq->private; |
| int orphans, sockets; |
| |
| orphans = tcp_orphan_count_sum(); |
| sockets = proto_sockets_allocated_sum_positive(&tcp_prot); |
| |
| socket_seq_show(seq); |
| seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n", |
| sock_prot_inuse_get(net, &tcp_prot), orphans, |
| refcount_read(&net->ipv4.tcp_death_row.tw_refcount) - 1, |
| sockets, proto_memory_allocated(&tcp_prot)); |
| seq_printf(seq, "UDP: inuse %d mem %ld\n", |
| sock_prot_inuse_get(net, &udp_prot), |
| proto_memory_allocated(&udp_prot)); |
| seq_printf(seq, "UDPLITE: inuse %d\n", |
| sock_prot_inuse_get(net, &udplite_prot)); |
| seq_printf(seq, "RAW: inuse %d\n", |
| sock_prot_inuse_get(net, &raw_prot)); |
| seq_printf(seq, "FRAG: inuse %u memory %lu\n", |
| atomic_read(&net->ipv4.fqdir->rhashtable.nelems), |
| frag_mem_limit(net->ipv4.fqdir)); |
| return 0; |
| } |
| |
| /* snmp items */ |
| static const struct snmp_mib snmp4_ipstats_list[] = { |
| SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS), |
| SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS), |
| SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS), |
| SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), |
| SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), |
| SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS), |
| SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS), |
| SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS), |
| SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS), |
| SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), |
| SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), |
| SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS), |
| SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS), |
| SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS), |
| SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS), |
| SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS), |
| SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES), |
| SNMP_MIB_SENTINEL |
| }; |
| |
| /* Following items are displayed in /proc/net/netstat */ |
| static const struct snmp_mib snmp4_ipextstats_list[] = { |
| SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES), |
| SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), |
| SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS), |
| SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), |
| SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS), |
| SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS), |
| SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS), |
| SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS), |
| SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS), |
| SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS), |
| SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS), |
| SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS), |
| /* Non RFC4293 fields */ |
| SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS), |
| SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS), |
| SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS), |
| SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS), |
| SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS), |
| SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS), |
| SNMP_MIB_SENTINEL |
| }; |
| |
| static const struct { |
| const char *name; |
| int index; |
| } icmpmibmap[] = { |
| { "DestUnreachs", ICMP_DEST_UNREACH }, |
| { "TimeExcds", ICMP_TIME_EXCEEDED }, |
| { "ParmProbs", ICMP_PARAMETERPROB }, |
| { "SrcQuenchs", ICMP_SOURCE_QUENCH }, |
| { "Redirects", ICMP_REDIRECT }, |
| { "Echos", ICMP_ECHO }, |
| { "EchoReps", ICMP_ECHOREPLY }, |
| { "Timestamps", ICMP_TIMESTAMP }, |
| { "TimestampReps", ICMP_TIMESTAMPREPLY }, |
| { "AddrMasks", ICMP_ADDRESS }, |
| { "AddrMaskReps", ICMP_ADDRESSREPLY }, |
| { NULL, 0 } |
| }; |
| |
| |
| static const struct snmp_mib snmp4_tcp_list[] = { |
| SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM), |
| SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN), |
| SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX), |
| SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN), |
| SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS), |
| SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS), |
| SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS), |
| SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS), |
| SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB), |
| SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS), |
| SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS), |
| SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS), |
| SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS), |
| SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS), |
| SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS), |
| SNMP_MIB_SENTINEL |
| }; |
| |
| static const struct snmp_mib snmp4_udp_list[] = { |
| SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS), |
| SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS), |
| SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS), |
| SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS), |
| SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS), |
| SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS), |
| SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS), |
| SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI), |
| SNMP_MIB_ITEM("MemErrors", UDP_MIB_MEMERRORS), |
| SNMP_MIB_SENTINEL |
| }; |
| |
| static const struct snmp_mib snmp4_net_list[] = { |
| SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), |
| SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), |
| SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), |
| SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), |
| SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), |
| SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), |
| SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), |
| SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), |
| SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), |
| SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), |
| SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), |
| SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), |
| SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), |
| SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), |
| SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), |
| SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), |
| SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), |
| SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), |
| SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), |
| SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), |
| SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), |
| SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), |
| SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), |
| SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), |
| SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), |
| SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), |
| SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), |
| SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), |
| SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), |
| SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), |
| SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), |
| SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), |
| SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), |
| SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), |
| SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), |
| SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), |
| SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), |
| SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), |
| SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), |
| SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), |
| SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES), |
| SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY), |
| SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), |
| SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), |
| SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), |
| SNMP_MIB_ITEM("TCPBacklogCoalesce", LINUX_MIB_TCPBACKLOGCOALESCE), |
| SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), |
| SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), |
| SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), |
| SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), |
| SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), |
| SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), |
| SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), |
| SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), |
| SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), |
| SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), |
| SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), |
| SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO), |
| SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), |
| SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), |
| SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), |
| SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), |
| SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND), |
| SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED), |
| SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE), |
| SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED), |
| SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED), |
| SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK), |
| SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP), |
| SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP), |
| SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP), |
| SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP), |
| SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER), |
| SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW), |
| SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES), |
| SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP), |
| SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL), |
| SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE), |
| SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE), |
| SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP), |
| SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE), |
| SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK), |
| SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE), |
| SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE), |
| SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL), |
| SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE), |
| SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL), |
| SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW), |
| SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD), |
| SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE), |
| SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES), |
| SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS), |
| SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING), |
| SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV), |
| SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV), |
| SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV), |
| SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS), |
| SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT), |
| SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT), |
| SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND), |
| SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT), |
| SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND), |
| SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV), |
| SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS), |
| SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ), |
| SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2), |
| SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT), |
| SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE), |
| SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE), |
| SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE), |
| SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL), |
| SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS), |
| SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED), |
| SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE), |
| SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED), |
| SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP), |
| SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP), |
| SNMP_MIB_ITEM("TCPWqueueTooBig", LINUX_MIB_TCPWQUEUETOOBIG), |
| SNMP_MIB_ITEM("TCPFastOpenPassiveAltKey", LINUX_MIB_TCPFASTOPENPASSIVEALTKEY), |
| SNMP_MIB_ITEM("TcpTimeoutRehash", LINUX_MIB_TCPTIMEOUTREHASH), |
| SNMP_MIB_ITEM("TcpDuplicateDataRehash", LINUX_MIB_TCPDUPLICATEDATAREHASH), |
| SNMP_MIB_ITEM("TCPDSACKRecvSegs", LINUX_MIB_TCPDSACKRECVSEGS), |
| SNMP_MIB_ITEM("TCPDSACKIgnoredDubious", LINUX_MIB_TCPDSACKIGNOREDDUBIOUS), |
| SNMP_MIB_ITEM("TCPMigrateReqSuccess", LINUX_MIB_TCPMIGRATEREQSUCCESS), |
| SNMP_MIB_ITEM("TCPMigrateReqFailure", LINUX_MIB_TCPMIGRATEREQFAILURE), |
| SNMP_MIB_ITEM("TCPPLBRehash", LINUX_MIB_TCPPLBREHASH), |
| SNMP_MIB_SENTINEL |
| }; |
| |
| static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals, |
| unsigned short *type, int count) |
| { |
| int j; |
| |
| if (count) { |
| seq_puts(seq, "\nIcmpMsg:"); |
| for (j = 0; j < count; ++j) |
| seq_printf(seq, " %sType%u", |
| type[j] & 0x100 ? "Out" : "In", |
| type[j] & 0xff); |
| seq_puts(seq, "\nIcmpMsg:"); |
| for (j = 0; j < count; ++j) |
| seq_printf(seq, " %lu", vals[j]); |
| } |
| } |
| |
| static void icmpmsg_put(struct seq_file *seq) |
| { |
| #define PERLINE 16 |
| |
| int i, count; |
| unsigned short type[PERLINE]; |
| unsigned long vals[PERLINE], val; |
| struct net *net = seq->private; |
| |
| count = 0; |
| for (i = 0; i < ICMPMSG_MIB_MAX; i++) { |
| val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]); |
| if (val) { |
| type[count] = i; |
| vals[count++] = val; |
| } |
| if (count == PERLINE) { |
| icmpmsg_put_line(seq, vals, type, count); |
| count = 0; |
| } |
| } |
| icmpmsg_put_line(seq, vals, type, count); |
| |
| #undef PERLINE |
| } |
| |
| static void icmp_put(struct seq_file *seq) |
| { |
| int i; |
| struct net *net = seq->private; |
| atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs; |
| |
| seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors"); |
| for (i = 0; icmpmibmap[i].name; i++) |
| seq_printf(seq, " In%s", icmpmibmap[i].name); |
| seq_puts(seq, " OutMsgs OutErrors"); |
| for (i = 0; icmpmibmap[i].name; i++) |
| seq_printf(seq, " Out%s", icmpmibmap[i].name); |
| seq_printf(seq, "\nIcmp: %lu %lu %lu", |
| snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS), |
| snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS), |
| snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS)); |
| for (i = 0; icmpmibmap[i].name; i++) |
| seq_printf(seq, " %lu", |
| atomic_long_read(ptr + icmpmibmap[i].index)); |
| seq_printf(seq, " %lu %lu", |
| snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS), |
| snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS)); |
| for (i = 0; icmpmibmap[i].name; i++) |
| seq_printf(seq, " %lu", |
| atomic_long_read(ptr + (icmpmibmap[i].index | 0x100))); |
| } |
| |
| /* |
| * Called from the PROCfs module. This outputs /proc/net/snmp. |
| */ |
| static int snmp_seq_show_ipstats(struct seq_file *seq, void *v) |
| { |
| struct net *net = seq->private; |
| u64 buff64[IPSTATS_MIB_MAX]; |
| int i; |
| |
| memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64)); |
| |
| seq_puts(seq, "Ip: Forwarding DefaultTTL"); |
| for (i = 0; snmp4_ipstats_list[i].name; i++) |
| seq_printf(seq, " %s", snmp4_ipstats_list[i].name); |
| |
| seq_printf(seq, "\nIp: %d %d", |
| IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2, |
| READ_ONCE(net->ipv4.sysctl_ip_default_ttl)); |
| |
| BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0); |
| snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list, |
| net->mib.ip_statistics, |
| offsetof(struct ipstats_mib, syncp)); |
| for (i = 0; snmp4_ipstats_list[i].name; i++) |
| seq_printf(seq, " %llu", buff64[i]); |
| |
| return 0; |
| } |
| |
| static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v) |
| { |
| unsigned long buff[TCPUDP_MIB_MAX]; |
| struct net *net = seq->private; |
| int i; |
| |
| memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); |
| |
| seq_puts(seq, "\nTcp:"); |
| for (i = 0; snmp4_tcp_list[i].name; i++) |
| seq_printf(seq, " %s", snmp4_tcp_list[i].name); |
| |
| seq_puts(seq, "\nTcp:"); |
| snmp_get_cpu_field_batch(buff, snmp4_tcp_list, |
| net->mib.tcp_statistics); |
| for (i = 0; snmp4_tcp_list[i].name; i++) { |
| /* MaxConn field is signed, RFC 2012 */ |
| if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) |
| seq_printf(seq, " %ld", buff[i]); |
| else |
| seq_printf(seq, " %lu", buff[i]); |
| } |
| |
| memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); |
| |
| snmp_get_cpu_field_batch(buff, snmp4_udp_list, |
| net->mib.udp_statistics); |
| seq_puts(seq, "\nUdp:"); |
| for (i = 0; snmp4_udp_list[i].name; i++) |
| seq_printf(seq, " %s", snmp4_udp_list[i].name); |
| seq_puts(seq, "\nUdp:"); |
| for (i = 0; snmp4_udp_list[i].name; i++) |
| seq_printf(seq, " %lu", buff[i]); |
| |
| memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); |
| |
| /* the UDP and UDP-Lite MIBs are the same */ |
| seq_puts(seq, "\nUdpLite:"); |
| snmp_get_cpu_field_batch(buff, snmp4_udp_list, |
| net->mib.udplite_statistics); |
| for (i = 0; snmp4_udp_list[i].name; i++) |
| seq_printf(seq, " %s", snmp4_udp_list[i].name); |
| seq_puts(seq, "\nUdpLite:"); |
| for (i = 0; snmp4_udp_list[i].name; i++) |
| seq_printf(seq, " %lu", buff[i]); |
| |
| seq_putc(seq, '\n'); |
| return 0; |
| } |
| |
| static int snmp_seq_show(struct seq_file *seq, void *v) |
| { |
| snmp_seq_show_ipstats(seq, v); |
| |
| icmp_put(seq); /* RFC 2011 compatibility */ |
| icmpmsg_put(seq); |
| |
| snmp_seq_show_tcp_udp(seq, v); |
| |
| return 0; |
| } |
| |
| /* |
| * Output /proc/net/netstat |
| */ |
| static int netstat_seq_show(struct seq_file *seq, void *v) |
| { |
| const int ip_cnt = ARRAY_SIZE(snmp4_ipextstats_list) - 1; |
| const int tcp_cnt = ARRAY_SIZE(snmp4_net_list) - 1; |
| struct net *net = seq->private; |
| unsigned long *buff; |
| int i; |
| |
| seq_puts(seq, "TcpExt:"); |
| for (i = 0; i < tcp_cnt; i++) |
| seq_printf(seq, " %s", snmp4_net_list[i].name); |
| |
| seq_puts(seq, "\nTcpExt:"); |
| buff = kzalloc(max(tcp_cnt * sizeof(long), ip_cnt * sizeof(u64)), |
| GFP_KERNEL); |
| if (buff) { |
| snmp_get_cpu_field_batch(buff, snmp4_net_list, |
| net->mib.net_statistics); |
| for (i = 0; i < tcp_cnt; i++) |
| seq_printf(seq, " %lu", buff[i]); |
| } else { |
| for (i = 0; i < tcp_cnt; i++) |
| seq_printf(seq, " %lu", |
| snmp_fold_field(net->mib.net_statistics, |
| snmp4_net_list[i].entry)); |
| } |
| seq_puts(seq, "\nIpExt:"); |
| for (i = 0; i < ip_cnt; i++) |
| seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); |
| |
| seq_puts(seq, "\nIpExt:"); |
| if (buff) { |
| u64 *buff64 = (u64 *)buff; |
| |
| memset(buff64, 0, ip_cnt * sizeof(u64)); |
| snmp_get_cpu_field64_batch(buff64, snmp4_ipextstats_list, |
| net->mib.ip_statistics, |
| offsetof(struct ipstats_mib, syncp)); |
| for (i = 0; i < ip_cnt; i++) |
| seq_printf(seq, " %llu", buff64[i]); |
| } else { |
| for (i = 0; i < ip_cnt; i++) |
| seq_printf(seq, " %llu", |
| snmp_fold_field64(net->mib.ip_statistics, |
| snmp4_ipextstats_list[i].entry, |
| offsetof(struct ipstats_mib, syncp))); |
| } |
| kfree(buff); |
| seq_putc(seq, '\n'); |
| mptcp_seq_show(seq); |
| return 0; |
| } |
| |
| static __net_init int ip_proc_init_net(struct net *net) |
| { |
| if (!proc_create_net_single("sockstat", 0444, net->proc_net, |
| sockstat_seq_show, NULL)) |
| goto out_sockstat; |
| if (!proc_create_net_single("netstat", 0444, net->proc_net, |
| netstat_seq_show, NULL)) |
| goto out_netstat; |
| if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show, |
| NULL)) |
| goto out_snmp; |
| |
| return 0; |
| |
| out_snmp: |
| remove_proc_entry("netstat", net->proc_net); |
| out_netstat: |
| remove_proc_entry("sockstat", net->proc_net); |
| out_sockstat: |
| return -ENOMEM; |
| } |
| |
| static __net_exit void ip_proc_exit_net(struct net *net) |
| { |
| remove_proc_entry("snmp", net->proc_net); |
| remove_proc_entry("netstat", net->proc_net); |
| remove_proc_entry("sockstat", net->proc_net); |
| } |
| |
| static __net_initdata struct pernet_operations ip_proc_ops = { |
| .init = ip_proc_init_net, |
| .exit = ip_proc_exit_net, |
| }; |
| |
| int __init ip_misc_proc_init(void) |
| { |
| return register_pernet_subsys(&ip_proc_ops); |
| } |