From 4617721c502b2ddaa4e324e86da4997edf738fa5 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Wed, 2 Sep 2026 09:55:01 -0400 Subject: ftrace: Synchronize the initialization of ftrace_ops There's some internal state that ftrace_ops needs to have set, but since it can be declared outside of the ftrace.c code, it calls ftrace_ops_init() on the ops in every global function. The issue is that if two tasks call it on the same ops at the same time it is possible to have the initialization of one corrupt the initialization of the other call. Create a ops_mutex to use to synchronize every initialization of the ftrace_ops. The mutex is taken within checking the ftrace_ops flag that states it was initializied but the flag is checked again after the mutex has been taken. Checking first outside the mutex allows it to shortcut having to take the mutex. But then the check needs to be done again after the mute is taken in case of races. Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock") Reported-by: sashiko-bot@kernel.org Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/ Signed-off-by: Steven Rostedt --- net/ipv4/proc.c | 556 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 556 insertions(+) create mode 100644 net/ipv4/proc.c (limited to 'net/ipv4/proc.c') diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c new file mode 100644 index 000000000..bfc06d171 --- /dev/null +++ b/net/ipv4/proc.c @@ -0,0 +1,556 @@ +// 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, + * Gerald J. Heim, + * Fred Baumgarten, + * Erik Schoenfelder, + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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, "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_OUTREQUESTS), + 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_ITEM("OutTransmits", IPSTATS_MIB_OUTPKTS), +}; + +/* 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), +}; + +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), +}; + +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), +}; + +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("BeyondWindow", LINUX_MIB_BEYOND_WINDOW), + SNMP_MIB_ITEM("TSEcrRejected", LINUX_MIB_TSECRREJECTED), + SNMP_MIB_ITEM("PAWSOldAck", LINUX_MIB_PAWS_OLD_ACK), + SNMP_MIB_ITEM("PAWSTimewait", LINUX_MIB_PAWS_TW_REJECTED), + 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_ITEM("TCPAORequired", LINUX_MIB_TCPAOREQUIRED), + SNMP_MIB_ITEM("TCPAOBad", LINUX_MIB_TCPAOBAD), + SNMP_MIB_ITEM("TCPAOKeyNotFound", LINUX_MIB_TCPAOKEYNOTFOUND), + SNMP_MIB_ITEM("TCPAOGood", LINUX_MIB_TCPAOGOOD), + SNMP_MIB_ITEM("TCPAODroppedIcmps", LINUX_MIB_TCPAODROPPEDICMPS), +}; + +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 OutRateLimitGlobal OutRateLimitHost"); + 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 %lu %lu", + snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS), + snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS), + snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_RATELIMITGLOBAL), + snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_RATELIMITHOST)); + 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) +{ + const int cnt = ARRAY_SIZE(snmp4_ipstats_list); + u64 buff64[ARRAY_SIZE(snmp4_ipstats_list)]; + struct net *net = seq->private; + int i; + + memset(buff64, 0, sizeof(buff64)); + + seq_puts(seq, "Ip: Forwarding DefaultTTL"); + for (i = 0; i < cnt; i++) + seq_printf(seq, " %s", snmp4_ipstats_list[i].name); + + seq_printf(seq, "\nIp: %d %d", + IPV4_DEVCONF_ALL_RO(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_cnt(buff64, snmp4_ipstats_list, cnt, + net->mib.ip_statistics, + offsetof(struct ipstats_mib, syncp)); + for (i = 0; i < cnt; i++) + seq_printf(seq, " %llu", buff64[i]); + + return 0; +} + +static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v) +{ + const int udp_cnt = ARRAY_SIZE(snmp4_udp_list); + const int tcp_cnt = ARRAY_SIZE(snmp4_tcp_list); + unsigned long buff[TCPUDP_MIB_MAX]; + struct net *net = seq->private; + int i; + + memset(buff, 0, tcp_cnt * sizeof(unsigned long)); + + seq_puts(seq, "\nTcp:"); + for (i = 0; i < tcp_cnt; i++) + seq_printf(seq, " %s", snmp4_tcp_list[i].name); + + seq_puts(seq, "\nTcp:"); + snmp_get_cpu_field_batch_cnt(buff, snmp4_tcp_list, + tcp_cnt, + net->mib.tcp_statistics); + for (i = 0; i < tcp_cnt; 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, udp_cnt * sizeof(unsigned long)); + + snmp_get_cpu_field_batch_cnt(buff, snmp4_udp_list, + udp_cnt, + net->mib.udp_statistics); + seq_puts(seq, "\nUdp:"); + for (i = 0; i < udp_cnt; i++) + seq_printf(seq, " %s", snmp4_udp_list[i].name); + seq_puts(seq, "\nUdp:"); + for (i = 0; i < udp_cnt; 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); + const int tcp_cnt = ARRAY_SIZE(snmp4_net_list); + 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_cnt(buff, snmp4_net_list, tcp_cnt, + 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_cnt(buff64, snmp4_ipextstats_list, ip_cnt, + 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); +} -- cgit v1.3.1