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proc.c
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linux-6.19.14/net/ipv4/proc.c
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/proto_memory.h> 37#include <net/udp.h> 38#include <net/udplite.h> 39#include <linux/bottom_half.h> 40#include <linux/inetdevice.h> 41#include <linux/proc_fs.h> 42#include <linux/seq_file.h> 43#include <linux/export.h> 44#include <net/sock.h> 45#include <net/raw.h> 46 47#define TCPUDP_MIB_MAX MAX_T(u32, UDP_MIB_MAX, TCP_MIB_MAX) 48 49/* 50 * Report socket allocation statistics [mea@utu.fi] 51 */ 52static int sockstat_seq_show(struct seq_file *seq, void *v) 53{ 54 struct net *net = seq->private; 55 int orphans, sockets; 56 57 orphans = tcp_orphan_count_sum(); 58 sockets = proto_sockets_allocated_sum_positive(&tcp_prot); 59 60 socket_seq_show(seq); 61 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n", 62 sock_prot_inuse_get(net, &tcp_prot), orphans, 63 refcount_read(&net->ipv4.tcp_death_row.tw_refcount) - 1, 64 sockets, proto_memory_allocated(&tcp_prot)); 65 seq_printf(seq, "UDP: inuse %d mem %ld\n", 66 sock_prot_inuse_get(net, &udp_prot), 67 proto_memory_allocated(&udp_prot)); 68 seq_printf(seq, "UDPLITE: inuse %d\n", 69 sock_prot_inuse_get(net, &udplite_prot)); 70 seq_printf(seq, "RAW: inuse %d\n", 71 sock_prot_inuse_get(net, &raw_prot)); 72 seq_printf(seq, "FRAG: inuse %u memory %lu\n", 73 atomic_read(&net->ipv4.fqdir->rhashtable.nelems), 74 frag_mem_limit(net->ipv4.fqdir)); 75 return 0; 76} 77 78/* snmp items */ 79static const struct snmp_mib snmp4_ipstats_list[] = { 80 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS), 81 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS), 82 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS), 83 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 84 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 85 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS), 86 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS), 87 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS), 88 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS), 89 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 90 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 91 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS), 92 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS), 93 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS), 94 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS), 95 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS), 96 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES), 97 SNMP_MIB_ITEM("OutTransmits", IPSTATS_MIB_OUTPKTS), 98}; 99 100/* Following items are displayed in /proc/net/netstat */ 101static 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}; 122 123static 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 142static 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}; 159 160static const struct snmp_mib snmp4_udp_list[] = { 161 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS), 162 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS), 163 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS), 164 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS), 165 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS), 166 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS), 167 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS), 168 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI), 169 SNMP_MIB_ITEM("MemErrors", UDP_MIB_MEMERRORS), 170}; 171 172static const struct snmp_mib snmp4_net_list[] = { 173 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), 174 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), 175 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), 176 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), 177 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), 178 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), 179 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), 180 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), 181 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), 182 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), 183 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), 184 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), 185 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), 186 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), 187 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), 188 SNMP_MIB_ITEM("BeyondWindow", LINUX_MIB_BEYOND_WINDOW), 189 SNMP_MIB_ITEM("TSEcrRejected", LINUX_MIB_TSECRREJECTED), 190 SNMP_MIB_ITEM("PAWSOldAck", LINUX_MIB_PAWS_OLD_ACK), 191 SNMP_MIB_ITEM("PAWSTimewait", LINUX_MIB_PAWS_TW_REJECTED), 192 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), 193 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), 194 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), 195 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), 196 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), 197 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), 198 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), 199 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), 200 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), 201 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), 202 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), 203 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), 204 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), 205 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), 206 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), 207 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), 208 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), 209 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), 210 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), 211 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), 212 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), 213 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), 214 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), 215 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), 216 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), 217 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES), 218 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY), 219 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), 220 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), 221 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), 222 SNMP_MIB_ITEM("TCPBacklogCoalesce", LINUX_MIB_TCPBACKLOGCOALESCE), 223 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 224 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 225 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 226 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 227 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), 228 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), 229 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), 230 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), 231 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), 232 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), 233 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), 234 SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO), 235 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), 236 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), 237 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), 238 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), 239 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND), 240 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED), 241 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE), 242 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED), 243 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED), 244 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK), 245 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP), 246 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP), 247 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP), 248 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP), 249 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER), 250 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW), 251 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES), 252 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP), 253 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL), 254 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE), 255 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE), 256 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP), 257 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE), 258 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK), 259 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE), 260 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE), 261 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL), 262 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE), 263 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL), 264 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW), 265 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD), 266 SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE), 267 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES), 268 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS), 269 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING), 270 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV), 271 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV), 272 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV), 273 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS), 274 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT), 275 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT), 276 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND), 277 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT), 278 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND), 279 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV), 280 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS), 281 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ), 282 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2), 283 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT), 284 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE), 285 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE), 286 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE), 287 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL), 288 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS), 289 SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED), 290 SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE), 291 SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED), 292 SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP), 293 SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP), 294 SNMP_MIB_ITEM("TCPWqueueTooBig", LINUX_MIB_TCPWQUEUETOOBIG), 295 SNMP_MIB_ITEM("TCPFastOpenPassiveAltKey", LINUX_MIB_TCPFASTOPENPASSIVEALTKEY), 296 SNMP_MIB_ITEM("TcpTimeoutRehash", LINUX_MIB_TCPTIMEOUTREHASH), 297 SNMP_MIB_ITEM("TcpDuplicateDataRehash", LINUX_MIB_TCPDUPLICATEDATAREHASH), 298 SNMP_MIB_ITEM("TCPDSACKRecvSegs", LINUX_MIB_TCPDSACKRECVSEGS), 299 SNMP_MIB_ITEM("TCPDSACKIgnoredDubious", LINUX_MIB_TCPDSACKIGNOREDDUBIOUS), 300 SNMP_MIB_ITEM("TCPMigrateReqSuccess", LINUX_MIB_TCPMIGRATEREQSUCCESS), 301 SNMP_MIB_ITEM("TCPMigrateReqFailure", LINUX_MIB_TCPMIGRATEREQFAILURE), 302 SNMP_MIB_ITEM("TCPPLBRehash", LINUX_MIB_TCPPLBREHASH), 303 SNMP_MIB_ITEM("TCPAORequired", LINUX_MIB_TCPAOREQUIRED), 304 SNMP_MIB_ITEM("TCPAOBad", LINUX_MIB_TCPAOBAD), 305 SNMP_MIB_ITEM("TCPAOKeyNotFound", LINUX_MIB_TCPAOKEYNOTFOUND), 306 SNMP_MIB_ITEM("TCPAOGood", LINUX_MIB_TCPAOGOOD), 307 SNMP_MIB_ITEM("TCPAODroppedIcmps", LINUX_MIB_TCPAODROPPEDICMPS), 308}; 309 310static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals, 311 unsigned short *type, int count) 312{ 313 int j; 314 315 if (count) { 316 seq_puts(seq, "\nIcmpMsg:"); 317 for (j = 0; j < count; ++j) 318 seq_printf(seq, " %sType%u", 319 type[j] & 0x100 ? "Out" : "In", 320 type[j] & 0xff); 321 seq_puts(seq, "\nIcmpMsg:"); 322 for (j = 0; j < count; ++j) 323 seq_printf(seq, " %lu", vals[j]); 324 } 325} 326 327static void icmpmsg_put(struct seq_file *seq) 328{ 329#define PERLINE 16 330 331 int i, count; 332 unsigned short type[PERLINE]; 333 unsigned long vals[PERLINE], val; 334 struct net *net = seq->private; 335 336 count = 0; 337 for (i = 0; i < ICMPMSG_MIB_MAX; i++) { 338 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]); 339 if (val) { 340 type[count] = i; 341 vals[count++] = val; 342 } 343 if (count == PERLINE) { 344 icmpmsg_put_line(seq, vals, type, count); 345 count = 0; 346 } 347 } 348 icmpmsg_put_line(seq, vals, type, count); 349 350#undef PERLINE 351} 352 353static void icmp_put(struct seq_file *seq) 354{ 355 int i; 356 struct net *net = seq->private; 357 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs; 358 359 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors"); 360 for (i = 0; icmpmibmap[i].name; i++) 361 seq_printf(seq, " In%s", icmpmibmap[i].name); 362 seq_puts(seq, " OutMsgs OutErrors OutRateLimitGlobal OutRateLimitHost"); 363 for (i = 0; icmpmibmap[i].name; i++) 364 seq_printf(seq, " Out%s", icmpmibmap[i].name); 365 seq_printf(seq, "\nIcmp: %lu %lu %lu", 366 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS), 367 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS), 368 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS)); 369 for (i = 0; icmpmibmap[i].name; i++) 370 seq_printf(seq, " %lu", 371 atomic_long_read(ptr + icmpmibmap[i].index)); 372 seq_printf(seq, " %lu %lu %lu %lu", 373 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS), 374 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS), 375 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_RATELIMITGLOBAL), 376 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_RATELIMITHOST)); 377 for (i = 0; icmpmibmap[i].name; i++) 378 seq_printf(seq, " %lu", 379 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100))); 380} 381 382/* 383 * Called from the PROCfs module. This outputs /proc/net/snmp. 384 */ 385static int snmp_seq_show_ipstats(struct seq_file *seq, void *v) 386{ 387 const int cnt = ARRAY_SIZE(snmp4_ipstats_list); 388 u64 buff64[ARRAY_SIZE(snmp4_ipstats_list)]; 389 struct net *net = seq->private; 390 int i; 391 392 memset(buff64, 0, sizeof(buff64)); 393 394 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 395 for (i = 0; i < cnt; i++) 396 seq_printf(seq, " %s", snmp4_ipstats_list[i].name); 397 398 seq_printf(seq, "\nIp: %d %d", 399 IPV4_DEVCONF_ALL_RO(net, FORWARDING) ? 1 : 2, 400 READ_ONCE(net->ipv4.sysctl_ip_default_ttl)); 401 402 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0); 403 snmp_get_cpu_field64_batch_cnt(buff64, snmp4_ipstats_list, cnt, 404 net->mib.ip_statistics, 405 offsetof(struct ipstats_mib, syncp)); 406 for (i = 0; i < cnt; i++) 407 seq_printf(seq, " %llu", buff64[i]); 408 409 return 0; 410} 411 412static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v) 413{ 414 const int udp_cnt = ARRAY_SIZE(snmp4_udp_list); 415 const int tcp_cnt = ARRAY_SIZE(snmp4_tcp_list); 416 unsigned long buff[TCPUDP_MIB_MAX]; 417 struct net *net = seq->private; 418 int i; 419 420 memset(buff, 0, tcp_cnt * sizeof(unsigned long)); 421 422 seq_puts(seq, "\nTcp:"); 423 for (i = 0; i < tcp_cnt; i++) 424 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 425 426 seq_puts(seq, "\nTcp:"); 427 snmp_get_cpu_field_batch_cnt(buff, snmp4_tcp_list, 428 tcp_cnt, 429 net->mib.tcp_statistics); 430 for (i = 0; i < tcp_cnt; i++) { 431 /* MaxConn field is signed, RFC 2012 */ 432 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 433 seq_printf(seq, " %ld", buff[i]); 434 else 435 seq_printf(seq, " %lu", buff[i]); 436 } 437 438 memset(buff, 0, udp_cnt * sizeof(unsigned long)); 439 440 snmp_get_cpu_field_batch_cnt(buff, snmp4_udp_list, 441 udp_cnt, 442 net->mib.udp_statistics); 443 seq_puts(seq, "\nUdp:"); 444 for (i = 0; i < udp_cnt; i++) 445 seq_printf(seq, " %s", snmp4_udp_list[i].name); 446 seq_puts(seq, "\nUdp:"); 447 for (i = 0; i < udp_cnt; i++) 448 seq_printf(seq, " %lu", buff[i]); 449 450 memset(buff, 0, udp_cnt * sizeof(unsigned long)); 451 452 /* the UDP and UDP-Lite MIBs are the same */ 453 seq_puts(seq, "\nUdpLite:"); 454 snmp_get_cpu_field_batch_cnt(buff, snmp4_udp_list, 455 udp_cnt, 456 net->mib.udplite_statistics); 457 for (i = 0; i < udp_cnt; i++) 458 seq_printf(seq, " %s", snmp4_udp_list[i].name); 459 seq_puts(seq, "\nUdpLite:"); 460 for (i = 0; i < udp_cnt; i++) 461 seq_printf(seq, " %lu", buff[i]); 462 463 seq_putc(seq, '\n'); 464 return 0; 465} 466 467static int snmp_seq_show(struct seq_file *seq, void *v) 468{ 469 snmp_seq_show_ipstats(seq, v); 470 471 icmp_put(seq); /* RFC 2011 compatibility */ 472 icmpmsg_put(seq); 473 474 snmp_seq_show_tcp_udp(seq, v); 475 476 return 0; 477} 478 479/* 480 * Output /proc/net/netstat 481 */ 482static int netstat_seq_show(struct seq_file *seq, void *v) 483{ 484 const int ip_cnt = ARRAY_SIZE(snmp4_ipextstats_list); 485 const int tcp_cnt = ARRAY_SIZE(snmp4_net_list); 486 struct net *net = seq->private; 487 unsigned long *buff; 488 int i; 489 490 seq_puts(seq, "TcpExt:"); 491 for (i = 0; i < tcp_cnt; i++) 492 seq_printf(seq, " %s", snmp4_net_list[i].name); 493 494 seq_puts(seq, "\nTcpExt:"); 495 buff = kzalloc(max(tcp_cnt * sizeof(long), ip_cnt * sizeof(u64)), 496 GFP_KERNEL); 497 if (buff) { 498 snmp_get_cpu_field_batch_cnt(buff, snmp4_net_list, tcp_cnt, 499 net->mib.net_statistics); 500 for (i = 0; i < tcp_cnt; i++) 501 seq_printf(seq, " %lu", buff[i]); 502 } else { 503 for (i = 0; i < tcp_cnt; i++) 504 seq_printf(seq, " %lu", 505 snmp_fold_field(net->mib.net_statistics, 506 snmp4_net_list[i].entry)); 507 } 508 seq_puts(seq, "\nIpExt:"); 509 for (i = 0; i < ip_cnt; i++) 510 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); 511 512 seq_puts(seq, "\nIpExt:"); 513 if (buff) { 514 u64 *buff64 = (u64 *)buff; 515 516 memset(buff64, 0, ip_cnt * sizeof(u64)); 517 snmp_get_cpu_field64_batch_cnt(buff64, snmp4_ipextstats_list, ip_cnt, 518 net->mib.ip_statistics, 519 offsetof(struct ipstats_mib, syncp)); 520 for (i = 0; i < ip_cnt; i++) 521 seq_printf(seq, " %llu", buff64[i]); 522 } else { 523 for (i = 0; i < ip_cnt; i++) 524 seq_printf(seq, " %llu", 525 snmp_fold_field64(net->mib.ip_statistics, 526 snmp4_ipextstats_list[i].entry, 527 offsetof(struct ipstats_mib, syncp))); 528 } 529 kfree(buff); 530 seq_putc(seq, '\n'); 531 mptcp_seq_show(seq); 532 return 0; 533} 534 535static __net_init int ip_proc_init_net(struct net *net) 536{ 537 if (!proc_create_net_single("sockstat", 0444, net->proc_net, 538 sockstat_seq_show, NULL)) 539 goto out_sockstat; 540 if (!proc_create_net_single("netstat", 0444, net->proc_net, 541 netstat_seq_show, NULL)) 542 goto out_netstat; 543 if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show, 544 NULL)) 545 goto out_snmp; 546 547 return 0; 548 549out_snmp: 550 remove_proc_entry("netstat", net->proc_net); 551out_netstat: 552 remove_proc_entry("sockstat", net->proc_net); 553out_sockstat: 554 return -ENOMEM; 555} 556 557static __net_exit void ip_proc_exit_net(struct net *net) 558{ 559 remove_proc_entry("snmp", net->proc_net); 560 remove_proc_entry("netstat", net->proc_net); 561 remove_proc_entry("sockstat", net->proc_net); 562} 563 564static __net_initdata struct pernet_operations ip_proc_ops = { 565 .init = ip_proc_init_net, 566 .exit = ip_proc_exit_net, 567}; 568 569int __init ip_misc_proc_init(void) 570{ 571 return register_pernet_subsys(&ip_proc_ops); 572}
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