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/udp.h> 36 #include <net/udplite.h> 37 #include <linux/bottom_half.h> 38 #include <linux/inetdevice.h> 39 #include <linux/proc_fs.h> 40 #include <linux/seq_file.h> 41 #include <linux/export.h> 42 #include <net/sock.h> 43 #include <net/raw.h> 44 45 #define TCPUDP_MIB_MAX max_t(u32, UDP_MIB_MAX, TCP_MIB_MAX) 46 47 /* 48 * Report socket allocation statistics [mea@utu.fi] 49 */ 50 static int sockstat_seq_show(struct seq_file *seq, void *v) 51 { 52 struct net *net = seq->private; 53 int orphans, sockets; 54 55 orphans = percpu_counter_sum_positive(&tcp_orphan_count); 56 sockets = proto_sockets_allocated_sum_positive(&tcp_prot); 57 58 socket_seq_show(seq); 59 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n", 60 sock_prot_inuse_get(net, &tcp_prot), orphans, 61 atomic_read(&net->ipv4.tcp_death_row.tw_count), sockets, 62 proto_memory_allocated(&tcp_prot)); 63 seq_printf(seq, "UDP: inuse %d mem %ld\n", 64 sock_prot_inuse_get(net, &udp_prot), 65 proto_memory_allocated(&udp_prot)); 66 seq_printf(seq, "UDPLITE: inuse %d\n", 67 sock_prot_inuse_get(net, &udplite_prot)); 68 seq_printf(seq, "RAW: inuse %d\n", 69 sock_prot_inuse_get(net, &raw_prot)); 70 seq_printf(seq, "FRAG: inuse %u memory %lu\n", 71 atomic_read(&net->ipv4.frags.rhashtable.nelems), 72 frag_mem_limit(&net->ipv4.frags)); 73 return 0; 74 } 75 76 /* snmp items */ 77 static const struct snmp_mib snmp4_ipstats_list[] = { 78 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS), 79 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS), 80 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS), 81 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 82 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 83 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS), 84 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS), 85 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS), 86 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS), 87 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 88 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 89 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS), 90 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS), 91 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS), 92 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS), 93 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS), 94 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES), 95 SNMP_MIB_SENTINEL 96 }; 97 98 /* Following items are displayed in /proc/net/netstat */ 99 static const struct snmp_mib snmp4_ipextstats_list[] = { 100 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES), 101 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 102 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 103 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 104 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS), 105 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS), 106 SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS), 107 SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS), 108 SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS), 109 SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS), 110 SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS), 111 SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS), 112 /* Non RFC4293 fields */ 113 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS), 114 SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS), 115 SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS), 116 SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS), 117 SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS), 118 SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS), 119 SNMP_MIB_SENTINEL 120 }; 121 122 static const struct { 123 const char *name; 124 int index; 125 } icmpmibmap[] = { 126 { "DestUnreachs", ICMP_DEST_UNREACH }, 127 { "TimeExcds", ICMP_TIME_EXCEEDED }, 128 { "ParmProbs", ICMP_PARAMETERPROB }, 129 { "SrcQuenchs", ICMP_SOURCE_QUENCH }, 130 { "Redirects", ICMP_REDIRECT }, 131 { "Echos", ICMP_ECHO }, 132 { "EchoReps", ICMP_ECHOREPLY }, 133 { "Timestamps", ICMP_TIMESTAMP }, 134 { "TimestampReps", ICMP_TIMESTAMPREPLY }, 135 { "AddrMasks", ICMP_ADDRESS }, 136 { "AddrMaskReps", ICMP_ADDRESSREPLY }, 137 { NULL, 0 } 138 }; 139 140 141 static const struct snmp_mib snmp4_tcp_list[] = { 142 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM), 143 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN), 144 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX), 145 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN), 146 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS), 147 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS), 148 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS), 149 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS), 150 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB), 151 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS), 152 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS), 153 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS), 154 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS), 155 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS), 156 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS), 157 SNMP_MIB_SENTINEL 158 }; 159 160 static 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_SENTINEL 170 }; 171 172 static 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("DelayedACKs", LINUX_MIB_DELAYEDACKS), 189 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), 190 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), 191 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), 192 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), 193 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), 194 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), 195 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), 196 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), 197 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), 198 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), 199 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), 200 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), 201 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), 202 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), 203 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), 204 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), 205 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), 206 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), 207 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), 208 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), 209 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), 210 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), 211 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), 212 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), 213 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES), 214 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY), 215 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), 216 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), 217 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), 218 SNMP_MIB_ITEM("TCPBacklogCoalesce", LINUX_MIB_TCPBACKLOGCOALESCE), 219 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 220 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 221 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 222 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 223 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), 224 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), 225 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), 226 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), 227 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), 228 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), 229 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), 230 SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO), 231 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), 232 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), 233 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), 234 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), 235 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND), 236 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED), 237 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE), 238 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED), 239 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED), 240 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK), 241 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP), 242 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP), 243 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP), 244 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP), 245 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER), 246 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW), 247 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES), 248 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP), 249 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL), 250 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE), 251 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE), 252 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP), 253 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE), 254 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK), 255 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE), 256 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE), 257 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL), 258 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE), 259 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL), 260 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW), 261 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD), 262 SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE), 263 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES), 264 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS), 265 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING), 266 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV), 267 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV), 268 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV), 269 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS), 270 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT), 271 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT), 272 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND), 273 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT), 274 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND), 275 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV), 276 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS), 277 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ), 278 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2), 279 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT), 280 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE), 281 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE), 282 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE), 283 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL), 284 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS), 285 SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED), 286 SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE), 287 SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED), 288 SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP), 289 SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP), 290 SNMP_MIB_SENTINEL 291 }; 292 293 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals, 294 unsigned short *type, int count) 295 { 296 int j; 297 298 if (count) { 299 seq_puts(seq, "\nIcmpMsg:"); 300 for (j = 0; j < count; ++j) 301 seq_printf(seq, " %sType%u", 302 type[j] & 0x100 ? "Out" : "In", 303 type[j] & 0xff); 304 seq_puts(seq, "\nIcmpMsg:"); 305 for (j = 0; j < count; ++j) 306 seq_printf(seq, " %lu", vals[j]); 307 } 308 } 309 310 static void icmpmsg_put(struct seq_file *seq) 311 { 312 #define PERLINE 16 313 314 int i, count; 315 unsigned short type[PERLINE]; 316 unsigned long vals[PERLINE], val; 317 struct net *net = seq->private; 318 319 count = 0; 320 for (i = 0; i < ICMPMSG_MIB_MAX; i++) { 321 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]); 322 if (val) { 323 type[count] = i; 324 vals[count++] = val; 325 } 326 if (count == PERLINE) { 327 icmpmsg_put_line(seq, vals, type, count); 328 count = 0; 329 } 330 } 331 icmpmsg_put_line(seq, vals, type, count); 332 333 #undef PERLINE 334 } 335 336 static void icmp_put(struct seq_file *seq) 337 { 338 int i; 339 struct net *net = seq->private; 340 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs; 341 342 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors"); 343 for (i = 0; icmpmibmap[i].name; i++) 344 seq_printf(seq, " In%s", icmpmibmap[i].name); 345 seq_puts(seq, " OutMsgs OutErrors"); 346 for (i = 0; icmpmibmap[i].name; i++) 347 seq_printf(seq, " Out%s", icmpmibmap[i].name); 348 seq_printf(seq, "\nIcmp: %lu %lu %lu", 349 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS), 350 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS), 351 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS)); 352 for (i = 0; icmpmibmap[i].name; i++) 353 seq_printf(seq, " %lu", 354 atomic_long_read(ptr + icmpmibmap[i].index)); 355 seq_printf(seq, " %lu %lu", 356 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS), 357 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS)); 358 for (i = 0; icmpmibmap[i].name; i++) 359 seq_printf(seq, " %lu", 360 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100))); 361 } 362 363 /* 364 * Called from the PROCfs module. This outputs /proc/net/snmp. 365 */ 366 static int snmp_seq_show_ipstats(struct seq_file *seq, void *v) 367 { 368 struct net *net = seq->private; 369 u64 buff64[IPSTATS_MIB_MAX]; 370 int i; 371 372 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64)); 373 374 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 375 for (i = 0; snmp4_ipstats_list[i].name; i++) 376 seq_printf(seq, " %s", snmp4_ipstats_list[i].name); 377 378 seq_printf(seq, "\nIp: %d %d", 379 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2, 380 net->ipv4.sysctl_ip_default_ttl); 381 382 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0); 383 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list, 384 net->mib.ip_statistics, 385 offsetof(struct ipstats_mib, syncp)); 386 for (i = 0; snmp4_ipstats_list[i].name; i++) 387 seq_printf(seq, " %llu", buff64[i]); 388 389 return 0; 390 } 391 392 static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v) 393 { 394 unsigned long buff[TCPUDP_MIB_MAX]; 395 struct net *net = seq->private; 396 int i; 397 398 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 399 400 seq_puts(seq, "\nTcp:"); 401 for (i = 0; snmp4_tcp_list[i].name; i++) 402 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 403 404 seq_puts(seq, "\nTcp:"); 405 snmp_get_cpu_field_batch(buff, snmp4_tcp_list, 406 net->mib.tcp_statistics); 407 for (i = 0; snmp4_tcp_list[i].name; i++) { 408 /* MaxConn field is signed, RFC 2012 */ 409 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 410 seq_printf(seq, " %ld", buff[i]); 411 else 412 seq_printf(seq, " %lu", buff[i]); 413 } 414 415 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 416 417 snmp_get_cpu_field_batch(buff, snmp4_udp_list, 418 net->mib.udp_statistics); 419 seq_puts(seq, "\nUdp:"); 420 for (i = 0; snmp4_udp_list[i].name; i++) 421 seq_printf(seq, " %s", snmp4_udp_list[i].name); 422 seq_puts(seq, "\nUdp:"); 423 for (i = 0; snmp4_udp_list[i].name; i++) 424 seq_printf(seq, " %lu", buff[i]); 425 426 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 427 428 /* the UDP and UDP-Lite MIBs are the same */ 429 seq_puts(seq, "\nUdpLite:"); 430 snmp_get_cpu_field_batch(buff, snmp4_udp_list, 431 net->mib.udplite_statistics); 432 for (i = 0; snmp4_udp_list[i].name; i++) 433 seq_printf(seq, " %s", snmp4_udp_list[i].name); 434 seq_puts(seq, "\nUdpLite:"); 435 for (i = 0; snmp4_udp_list[i].name; i++) 436 seq_printf(seq, " %lu", buff[i]); 437 438 seq_putc(seq, '\n'); 439 return 0; 440 } 441 442 static int snmp_seq_show(struct seq_file *seq, void *v) 443 { 444 snmp_seq_show_ipstats(seq, v); 445 446 icmp_put(seq); /* RFC 2011 compatibility */ 447 icmpmsg_put(seq); 448 449 snmp_seq_show_tcp_udp(seq, v); 450 451 return 0; 452 } 453 454 /* 455 * Output /proc/net/netstat 456 */ 457 static int netstat_seq_show(struct seq_file *seq, void *v) 458 { 459 int i; 460 struct net *net = seq->private; 461 462 seq_puts(seq, "TcpExt:"); 463 for (i = 0; snmp4_net_list[i].name; i++) 464 seq_printf(seq, " %s", snmp4_net_list[i].name); 465 466 seq_puts(seq, "\nTcpExt:"); 467 for (i = 0; snmp4_net_list[i].name; i++) 468 seq_printf(seq, " %lu", 469 snmp_fold_field(net->mib.net_statistics, 470 snmp4_net_list[i].entry)); 471 472 seq_puts(seq, "\nIpExt:"); 473 for (i = 0; snmp4_ipextstats_list[i].name; i++) 474 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); 475 476 seq_puts(seq, "\nIpExt:"); 477 for (i = 0; snmp4_ipextstats_list[i].name; i++) 478 seq_printf(seq, " %llu", 479 snmp_fold_field64(net->mib.ip_statistics, 480 snmp4_ipextstats_list[i].entry, 481 offsetof(struct ipstats_mib, syncp))); 482 483 seq_putc(seq, '\n'); 484 return 0; 485 } 486 487 static __net_init int ip_proc_init_net(struct net *net) 488 { 489 if (!proc_create_net_single("sockstat", 0444, net->proc_net, 490 sockstat_seq_show, NULL)) 491 goto out_sockstat; 492 if (!proc_create_net_single("netstat", 0444, net->proc_net, 493 netstat_seq_show, NULL)) 494 goto out_netstat; 495 if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show, 496 NULL)) 497 goto out_snmp; 498 499 return 0; 500 501 out_snmp: 502 remove_proc_entry("netstat", net->proc_net); 503 out_netstat: 504 remove_proc_entry("sockstat", net->proc_net); 505 out_sockstat: 506 return -ENOMEM; 507 } 508 509 static __net_exit void ip_proc_exit_net(struct net *net) 510 { 511 remove_proc_entry("snmp", net->proc_net); 512 remove_proc_entry("netstat", net->proc_net); 513 remove_proc_entry("sockstat", net->proc_net); 514 } 515 516 static __net_initdata struct pernet_operations ip_proc_ops = { 517 .init = ip_proc_init_net, 518 .exit = ip_proc_exit_net, 519 }; 520 521 int __init ip_misc_proc_init(void) 522 { 523 return register_pernet_subsys(&ip_proc_ops); 524 } 525