1 /* 2 * INET An implementation of the TCP/IP protocol suite for the LINUX 3 * operating system. INET is implemented using the BSD Socket 4 * interface as the means of communication with the user level. 5 * 6 * This file implements the various access functions for the 7 * PROC file system. It is mainly used for debugging and 8 * statistics. 9 * 10 * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 11 * Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de> 12 * Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de> 13 * Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de> 14 * 15 * Fixes: 16 * Alan Cox : UDP sockets show the rxqueue/txqueue 17 * using hint flag for the netinfo. 18 * Pauline Middelink : identd support 19 * Alan Cox : Make /proc safer. 20 * Erik Schoenfelder : /proc/net/snmp 21 * Alan Cox : Handle dead sockets properly. 22 * Gerhard Koerting : Show both timers 23 * Alan Cox : Allow inode to be NULL (kernel socket) 24 * Andi Kleen : Add support for open_requests and 25 * split functions for more readibility. 26 * Andi Kleen : Add support for /proc/net/netstat 27 * Arnaldo C. Melo : Convert to seq_file 28 * 29 * This program is free software; you can redistribute it and/or 30 * modify it under the terms of the GNU General Public License 31 * as published by the Free Software Foundation; either version 32 * 2 of the License, or (at your option) any later version. 33 */ 34 #include <linux/types.h> 35 #include <net/net_namespace.h> 36 #include <net/icmp.h> 37 #include <net/protocol.h> 38 #include <net/tcp.h> 39 #include <net/udp.h> 40 #include <net/udplite.h> 41 #include <linux/bottom_half.h> 42 #include <linux/inetdevice.h> 43 #include <linux/proc_fs.h> 44 #include <linux/seq_file.h> 45 #include <linux/export.h> 46 #include <net/sock.h> 47 #include <net/raw.h> 48 49 #define TCPUDP_MIB_MAX max_t(u32, UDP_MIB_MAX, TCP_MIB_MAX) 50 51 /* 52 * Report socket allocation statistics [mea@utu.fi] 53 */ 54 static int sockstat_seq_show(struct seq_file *seq, void *v) 55 { 56 struct net *net = seq->private; 57 int orphans, sockets; 58 59 orphans = percpu_counter_sum_positive(&tcp_orphan_count); 60 sockets = proto_sockets_allocated_sum_positive(&tcp_prot); 61 62 socket_seq_show(seq); 63 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n", 64 sock_prot_inuse_get(net, &tcp_prot), orphans, 65 atomic_read(&net->ipv4.tcp_death_row.tw_count), sockets, 66 proto_memory_allocated(&tcp_prot)); 67 seq_printf(seq, "UDP: inuse %d mem %ld\n", 68 sock_prot_inuse_get(net, &udp_prot), 69 proto_memory_allocated(&udp_prot)); 70 seq_printf(seq, "UDPLITE: inuse %d\n", 71 sock_prot_inuse_get(net, &udplite_prot)); 72 seq_printf(seq, "RAW: inuse %d\n", 73 sock_prot_inuse_get(net, &raw_prot)); 74 seq_printf(seq, "FRAG: inuse %u memory %lu\n", 75 atomic_read(&net->ipv4.frags.rhashtable.nelems), 76 frag_mem_limit(&net->ipv4.frags)); 77 return 0; 78 } 79 80 /* snmp items */ 81 static const struct snmp_mib snmp4_ipstats_list[] = { 82 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS), 83 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS), 84 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS), 85 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 86 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 87 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS), 88 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS), 89 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS), 90 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS), 91 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 92 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 93 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS), 94 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS), 95 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS), 96 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS), 97 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS), 98 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES), 99 SNMP_MIB_SENTINEL 100 }; 101 102 /* Following items are displayed in /proc/net/netstat */ 103 static const struct snmp_mib snmp4_ipextstats_list[] = { 104 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES), 105 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 106 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 107 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 108 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS), 109 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS), 110 SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS), 111 SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS), 112 SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS), 113 SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS), 114 SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS), 115 SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS), 116 /* Non RFC4293 fields */ 117 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS), 118 SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS), 119 SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS), 120 SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS), 121 SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS), 122 SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS), 123 SNMP_MIB_SENTINEL 124 }; 125 126 static const struct { 127 const char *name; 128 int index; 129 } icmpmibmap[] = { 130 { "DestUnreachs", ICMP_DEST_UNREACH }, 131 { "TimeExcds", ICMP_TIME_EXCEEDED }, 132 { "ParmProbs", ICMP_PARAMETERPROB }, 133 { "SrcQuenchs", ICMP_SOURCE_QUENCH }, 134 { "Redirects", ICMP_REDIRECT }, 135 { "Echos", ICMP_ECHO }, 136 { "EchoReps", ICMP_ECHOREPLY }, 137 { "Timestamps", ICMP_TIMESTAMP }, 138 { "TimestampReps", ICMP_TIMESTAMPREPLY }, 139 { "AddrMasks", ICMP_ADDRESS }, 140 { "AddrMaskReps", ICMP_ADDRESSREPLY }, 141 { NULL, 0 } 142 }; 143 144 145 static const struct snmp_mib snmp4_tcp_list[] = { 146 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM), 147 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN), 148 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX), 149 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN), 150 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS), 151 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS), 152 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS), 153 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS), 154 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB), 155 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS), 156 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS), 157 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS), 158 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS), 159 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS), 160 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS), 161 SNMP_MIB_SENTINEL 162 }; 163 164 static const struct snmp_mib snmp4_udp_list[] = { 165 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS), 166 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS), 167 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS), 168 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS), 169 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS), 170 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS), 171 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS), 172 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI), 173 SNMP_MIB_SENTINEL 174 }; 175 176 static const struct snmp_mib snmp4_net_list[] = { 177 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), 178 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), 179 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), 180 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), 181 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), 182 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), 183 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), 184 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), 185 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), 186 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), 187 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), 188 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), 189 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), 190 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), 191 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), 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("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 223 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 224 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 225 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 226 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), 227 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), 228 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), 229 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), 230 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), 231 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), 232 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), 233 SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO), 234 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), 235 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), 236 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), 237 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), 238 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND), 239 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED), 240 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE), 241 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED), 242 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED), 243 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK), 244 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP), 245 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP), 246 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP), 247 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP), 248 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER), 249 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW), 250 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES), 251 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP), 252 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL), 253 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE), 254 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE), 255 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP), 256 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE), 257 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK), 258 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE), 259 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE), 260 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL), 261 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE), 262 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL), 263 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW), 264 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD), 265 SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE), 266 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES), 267 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS), 268 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING), 269 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV), 270 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV), 271 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV), 272 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS), 273 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT), 274 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT), 275 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND), 276 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT), 277 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND), 278 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV), 279 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS), 280 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ), 281 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2), 282 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT), 283 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE), 284 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE), 285 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE), 286 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL), 287 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS), 288 SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED), 289 SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE), 290 SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED), 291 SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP), 292 SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP), 293 SNMP_MIB_SENTINEL 294 }; 295 296 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals, 297 unsigned short *type, int count) 298 { 299 int j; 300 301 if (count) { 302 seq_puts(seq, "\nIcmpMsg:"); 303 for (j = 0; j < count; ++j) 304 seq_printf(seq, " %sType%u", 305 type[j] & 0x100 ? "Out" : "In", 306 type[j] & 0xff); 307 seq_puts(seq, "\nIcmpMsg:"); 308 for (j = 0; j < count; ++j) 309 seq_printf(seq, " %lu", vals[j]); 310 } 311 } 312 313 static void icmpmsg_put(struct seq_file *seq) 314 { 315 #define PERLINE 16 316 317 int i, count; 318 unsigned short type[PERLINE]; 319 unsigned long vals[PERLINE], val; 320 struct net *net = seq->private; 321 322 count = 0; 323 for (i = 0; i < ICMPMSG_MIB_MAX; i++) { 324 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]); 325 if (val) { 326 type[count] = i; 327 vals[count++] = val; 328 } 329 if (count == PERLINE) { 330 icmpmsg_put_line(seq, vals, type, count); 331 count = 0; 332 } 333 } 334 icmpmsg_put_line(seq, vals, type, count); 335 336 #undef PERLINE 337 } 338 339 static void icmp_put(struct seq_file *seq) 340 { 341 int i; 342 struct net *net = seq->private; 343 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs; 344 345 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors"); 346 for (i = 0; icmpmibmap[i].name; i++) 347 seq_printf(seq, " In%s", icmpmibmap[i].name); 348 seq_puts(seq, " OutMsgs OutErrors"); 349 for (i = 0; icmpmibmap[i].name; i++) 350 seq_printf(seq, " Out%s", icmpmibmap[i].name); 351 seq_printf(seq, "\nIcmp: %lu %lu %lu", 352 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS), 353 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS), 354 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS)); 355 for (i = 0; icmpmibmap[i].name; i++) 356 seq_printf(seq, " %lu", 357 atomic_long_read(ptr + icmpmibmap[i].index)); 358 seq_printf(seq, " %lu %lu", 359 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS), 360 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS)); 361 for (i = 0; icmpmibmap[i].name; i++) 362 seq_printf(seq, " %lu", 363 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100))); 364 } 365 366 /* 367 * Called from the PROCfs module. This outputs /proc/net/snmp. 368 */ 369 static int snmp_seq_show_ipstats(struct seq_file *seq, void *v) 370 { 371 struct net *net = seq->private; 372 u64 buff64[IPSTATS_MIB_MAX]; 373 int i; 374 375 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64)); 376 377 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 378 for (i = 0; snmp4_ipstats_list[i].name; i++) 379 seq_printf(seq, " %s", snmp4_ipstats_list[i].name); 380 381 seq_printf(seq, "\nIp: %d %d", 382 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2, 383 net->ipv4.sysctl_ip_default_ttl); 384 385 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0); 386 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list, 387 net->mib.ip_statistics, 388 offsetof(struct ipstats_mib, syncp)); 389 for (i = 0; snmp4_ipstats_list[i].name; i++) 390 seq_printf(seq, " %llu", buff64[i]); 391 392 return 0; 393 } 394 395 static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v) 396 { 397 unsigned long buff[TCPUDP_MIB_MAX]; 398 struct net *net = seq->private; 399 int i; 400 401 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 402 403 seq_puts(seq, "\nTcp:"); 404 for (i = 0; snmp4_tcp_list[i].name; i++) 405 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 406 407 seq_puts(seq, "\nTcp:"); 408 snmp_get_cpu_field_batch(buff, snmp4_tcp_list, 409 net->mib.tcp_statistics); 410 for (i = 0; snmp4_tcp_list[i].name; i++) { 411 /* MaxConn field is signed, RFC 2012 */ 412 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 413 seq_printf(seq, " %ld", buff[i]); 414 else 415 seq_printf(seq, " %lu", buff[i]); 416 } 417 418 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 419 420 snmp_get_cpu_field_batch(buff, snmp4_udp_list, 421 net->mib.udp_statistics); 422 seq_puts(seq, "\nUdp:"); 423 for (i = 0; snmp4_udp_list[i].name; i++) 424 seq_printf(seq, " %s", snmp4_udp_list[i].name); 425 seq_puts(seq, "\nUdp:"); 426 for (i = 0; snmp4_udp_list[i].name; i++) 427 seq_printf(seq, " %lu", buff[i]); 428 429 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 430 431 /* the UDP and UDP-Lite MIBs are the same */ 432 seq_puts(seq, "\nUdpLite:"); 433 snmp_get_cpu_field_batch(buff, snmp4_udp_list, 434 net->mib.udplite_statistics); 435 for (i = 0; snmp4_udp_list[i].name; i++) 436 seq_printf(seq, " %s", snmp4_udp_list[i].name); 437 seq_puts(seq, "\nUdpLite:"); 438 for (i = 0; snmp4_udp_list[i].name; i++) 439 seq_printf(seq, " %lu", buff[i]); 440 441 seq_putc(seq, '\n'); 442 return 0; 443 } 444 445 static int snmp_seq_show(struct seq_file *seq, void *v) 446 { 447 snmp_seq_show_ipstats(seq, v); 448 449 icmp_put(seq); /* RFC 2011 compatibility */ 450 icmpmsg_put(seq); 451 452 snmp_seq_show_tcp_udp(seq, v); 453 454 return 0; 455 } 456 457 /* 458 * Output /proc/net/netstat 459 */ 460 static int netstat_seq_show(struct seq_file *seq, void *v) 461 { 462 int i; 463 struct net *net = seq->private; 464 465 seq_puts(seq, "TcpExt:"); 466 for (i = 0; snmp4_net_list[i].name; i++) 467 seq_printf(seq, " %s", snmp4_net_list[i].name); 468 469 seq_puts(seq, "\nTcpExt:"); 470 for (i = 0; snmp4_net_list[i].name; i++) 471 seq_printf(seq, " %lu", 472 snmp_fold_field(net->mib.net_statistics, 473 snmp4_net_list[i].entry)); 474 475 seq_puts(seq, "\nIpExt:"); 476 for (i = 0; snmp4_ipextstats_list[i].name; i++) 477 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); 478 479 seq_puts(seq, "\nIpExt:"); 480 for (i = 0; snmp4_ipextstats_list[i].name; i++) 481 seq_printf(seq, " %llu", 482 snmp_fold_field64(net->mib.ip_statistics, 483 snmp4_ipextstats_list[i].entry, 484 offsetof(struct ipstats_mib, syncp))); 485 486 seq_putc(seq, '\n'); 487 return 0; 488 } 489 490 static __net_init int ip_proc_init_net(struct net *net) 491 { 492 if (!proc_create_net_single("sockstat", 0444, net->proc_net, 493 sockstat_seq_show, NULL)) 494 goto out_sockstat; 495 if (!proc_create_net_single("netstat", 0444, net->proc_net, 496 netstat_seq_show, NULL)) 497 goto out_netstat; 498 if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show, 499 NULL)) 500 goto out_snmp; 501 502 return 0; 503 504 out_snmp: 505 remove_proc_entry("netstat", net->proc_net); 506 out_netstat: 507 remove_proc_entry("sockstat", net->proc_net); 508 out_sockstat: 509 return -ENOMEM; 510 } 511 512 static __net_exit void ip_proc_exit_net(struct net *net) 513 { 514 remove_proc_entry("snmp", net->proc_net); 515 remove_proc_entry("netstat", net->proc_net); 516 remove_proc_entry("sockstat", net->proc_net); 517 } 518 519 static __net_initdata struct pernet_operations ip_proc_ops = { 520 .init = ip_proc_init_net, 521 .exit = ip_proc_exit_net, 522 }; 523 524 int __init ip_misc_proc_init(void) 525 { 526 return register_pernet_subsys(&ip_proc_ops); 527 } 528