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 static int sockstat_seq_open(struct inode *inode, struct file *file) 81 { 82 return single_open_net(inode, file, sockstat_seq_show); 83 } 84 85 static const struct file_operations sockstat_seq_fops = { 86 .open = sockstat_seq_open, 87 .read = seq_read, 88 .llseek = seq_lseek, 89 .release = single_release_net, 90 }; 91 92 /* snmp items */ 93 static const struct snmp_mib snmp4_ipstats_list[] = { 94 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS), 95 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS), 96 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS), 97 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 98 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 99 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS), 100 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS), 101 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS), 102 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS), 103 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 104 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 105 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS), 106 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS), 107 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS), 108 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS), 109 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS), 110 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES), 111 SNMP_MIB_SENTINEL 112 }; 113 114 /* Following items are displayed in /proc/net/netstat */ 115 static const struct snmp_mib snmp4_ipextstats_list[] = { 116 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES), 117 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 118 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 119 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 120 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS), 121 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS), 122 SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS), 123 SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS), 124 SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS), 125 SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS), 126 SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS), 127 SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS), 128 /* Non RFC4293 fields */ 129 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS), 130 SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS), 131 SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS), 132 SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS), 133 SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS), 134 SNMP_MIB_SENTINEL 135 }; 136 137 static const struct { 138 const char *name; 139 int index; 140 } icmpmibmap[] = { 141 { "DestUnreachs", ICMP_DEST_UNREACH }, 142 { "TimeExcds", ICMP_TIME_EXCEEDED }, 143 { "ParmProbs", ICMP_PARAMETERPROB }, 144 { "SrcQuenchs", ICMP_SOURCE_QUENCH }, 145 { "Redirects", ICMP_REDIRECT }, 146 { "Echos", ICMP_ECHO }, 147 { "EchoReps", ICMP_ECHOREPLY }, 148 { "Timestamps", ICMP_TIMESTAMP }, 149 { "TimestampReps", ICMP_TIMESTAMPREPLY }, 150 { "AddrMasks", ICMP_ADDRESS }, 151 { "AddrMaskReps", ICMP_ADDRESSREPLY }, 152 { NULL, 0 } 153 }; 154 155 156 static const struct snmp_mib snmp4_tcp_list[] = { 157 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM), 158 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN), 159 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX), 160 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN), 161 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS), 162 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS), 163 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS), 164 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS), 165 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB), 166 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS), 167 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS), 168 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS), 169 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS), 170 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS), 171 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS), 172 SNMP_MIB_SENTINEL 173 }; 174 175 static const struct snmp_mib snmp4_udp_list[] = { 176 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS), 177 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS), 178 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS), 179 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS), 180 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS), 181 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS), 182 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS), 183 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI), 184 SNMP_MIB_SENTINEL 185 }; 186 187 static const struct snmp_mib snmp4_net_list[] = { 188 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), 189 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), 190 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), 191 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), 192 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), 193 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), 194 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), 195 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), 196 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), 197 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), 198 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), 199 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), 200 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), 201 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), 202 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), 203 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), 204 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), 205 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), 206 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), 207 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), 208 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), 209 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), 210 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), 211 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), 212 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), 213 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), 214 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), 215 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), 216 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), 217 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), 218 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), 219 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), 220 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), 221 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), 222 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), 223 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), 224 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), 225 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), 226 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), 227 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), 228 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES), 229 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY), 230 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), 231 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), 232 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), 233 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 234 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 235 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 236 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 237 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), 238 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), 239 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), 240 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), 241 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), 242 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), 243 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), 244 SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO), 245 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), 246 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), 247 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), 248 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), 249 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND), 250 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED), 251 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE), 252 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED), 253 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED), 254 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK), 255 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP), 256 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP), 257 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP), 258 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP), 259 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER), 260 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW), 261 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES), 262 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP), 263 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL), 264 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE), 265 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE), 266 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP), 267 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE), 268 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK), 269 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE), 270 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE), 271 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL), 272 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE), 273 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL), 274 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW), 275 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD), 276 SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE), 277 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES), 278 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS), 279 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING), 280 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV), 281 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV), 282 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV), 283 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS), 284 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT), 285 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT), 286 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND), 287 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT), 288 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND), 289 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV), 290 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS), 291 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ), 292 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2), 293 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT), 294 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE), 295 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE), 296 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE), 297 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL), 298 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS), 299 SNMP_MIB_SENTINEL 300 }; 301 302 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals, 303 unsigned short *type, int count) 304 { 305 int j; 306 307 if (count) { 308 seq_puts(seq, "\nIcmpMsg:"); 309 for (j = 0; j < count; ++j) 310 seq_printf(seq, " %sType%u", 311 type[j] & 0x100 ? "Out" : "In", 312 type[j] & 0xff); 313 seq_puts(seq, "\nIcmpMsg:"); 314 for (j = 0; j < count; ++j) 315 seq_printf(seq, " %lu", vals[j]); 316 } 317 } 318 319 static void icmpmsg_put(struct seq_file *seq) 320 { 321 #define PERLINE 16 322 323 int i, count; 324 unsigned short type[PERLINE]; 325 unsigned long vals[PERLINE], val; 326 struct net *net = seq->private; 327 328 count = 0; 329 for (i = 0; i < ICMPMSG_MIB_MAX; i++) { 330 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]); 331 if (val) { 332 type[count] = i; 333 vals[count++] = val; 334 } 335 if (count == PERLINE) { 336 icmpmsg_put_line(seq, vals, type, count); 337 count = 0; 338 } 339 } 340 icmpmsg_put_line(seq, vals, type, count); 341 342 #undef PERLINE 343 } 344 345 static void icmp_put(struct seq_file *seq) 346 { 347 int i; 348 struct net *net = seq->private; 349 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs; 350 351 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors"); 352 for (i = 0; icmpmibmap[i].name; i++) 353 seq_printf(seq, " In%s", icmpmibmap[i].name); 354 seq_puts(seq, " OutMsgs OutErrors"); 355 for (i = 0; icmpmibmap[i].name; i++) 356 seq_printf(seq, " Out%s", icmpmibmap[i].name); 357 seq_printf(seq, "\nIcmp: %lu %lu %lu", 358 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS), 359 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS), 360 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS)); 361 for (i = 0; icmpmibmap[i].name; i++) 362 seq_printf(seq, " %lu", 363 atomic_long_read(ptr + icmpmibmap[i].index)); 364 seq_printf(seq, " %lu %lu", 365 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS), 366 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS)); 367 for (i = 0; icmpmibmap[i].name; i++) 368 seq_printf(seq, " %lu", 369 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100))); 370 } 371 372 /* 373 * Called from the PROCfs module. This outputs /proc/net/snmp. 374 */ 375 static int snmp_seq_show_ipstats(struct seq_file *seq, void *v) 376 { 377 struct net *net = seq->private; 378 u64 buff64[IPSTATS_MIB_MAX]; 379 int i; 380 381 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64)); 382 383 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 384 for (i = 0; snmp4_ipstats_list[i].name; i++) 385 seq_printf(seq, " %s", snmp4_ipstats_list[i].name); 386 387 seq_printf(seq, "\nIp: %d %d", 388 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2, 389 net->ipv4.sysctl_ip_default_ttl); 390 391 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0); 392 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list, 393 net->mib.ip_statistics, 394 offsetof(struct ipstats_mib, syncp)); 395 for (i = 0; snmp4_ipstats_list[i].name; i++) 396 seq_printf(seq, " %llu", buff64[i]); 397 398 return 0; 399 } 400 401 static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v) 402 { 403 unsigned long buff[TCPUDP_MIB_MAX]; 404 struct net *net = seq->private; 405 int i; 406 407 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 408 409 seq_puts(seq, "\nTcp:"); 410 for (i = 0; snmp4_tcp_list[i].name; i++) 411 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 412 413 seq_puts(seq, "\nTcp:"); 414 snmp_get_cpu_field_batch(buff, snmp4_tcp_list, 415 net->mib.tcp_statistics); 416 for (i = 0; snmp4_tcp_list[i].name; i++) { 417 /* MaxConn field is signed, RFC 2012 */ 418 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 419 seq_printf(seq, " %ld", buff[i]); 420 else 421 seq_printf(seq, " %lu", buff[i]); 422 } 423 424 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 425 426 snmp_get_cpu_field_batch(buff, snmp4_udp_list, 427 net->mib.udp_statistics); 428 seq_puts(seq, "\nUdp:"); 429 for (i = 0; snmp4_udp_list[i].name; i++) 430 seq_printf(seq, " %s", snmp4_udp_list[i].name); 431 seq_puts(seq, "\nUdp:"); 432 for (i = 0; snmp4_udp_list[i].name; i++) 433 seq_printf(seq, " %lu", buff[i]); 434 435 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 436 437 /* the UDP and UDP-Lite MIBs are the same */ 438 seq_puts(seq, "\nUdpLite:"); 439 snmp_get_cpu_field_batch(buff, snmp4_udp_list, 440 net->mib.udplite_statistics); 441 for (i = 0; snmp4_udp_list[i].name; i++) 442 seq_printf(seq, " %s", snmp4_udp_list[i].name); 443 seq_puts(seq, "\nUdpLite:"); 444 for (i = 0; snmp4_udp_list[i].name; i++) 445 seq_printf(seq, " %lu", buff[i]); 446 447 seq_putc(seq, '\n'); 448 return 0; 449 } 450 451 static int snmp_seq_show(struct seq_file *seq, void *v) 452 { 453 snmp_seq_show_ipstats(seq, v); 454 455 icmp_put(seq); /* RFC 2011 compatibility */ 456 icmpmsg_put(seq); 457 458 snmp_seq_show_tcp_udp(seq, v); 459 460 return 0; 461 } 462 463 static int snmp_seq_open(struct inode *inode, struct file *file) 464 { 465 return single_open_net(inode, file, snmp_seq_show); 466 } 467 468 static const struct file_operations snmp_seq_fops = { 469 .open = snmp_seq_open, 470 .read = seq_read, 471 .llseek = seq_lseek, 472 .release = single_release_net, 473 }; 474 475 476 477 /* 478 * Output /proc/net/netstat 479 */ 480 static int netstat_seq_show(struct seq_file *seq, void *v) 481 { 482 int i; 483 struct net *net = seq->private; 484 485 seq_puts(seq, "TcpExt:"); 486 for (i = 0; snmp4_net_list[i].name; i++) 487 seq_printf(seq, " %s", snmp4_net_list[i].name); 488 489 seq_puts(seq, "\nTcpExt:"); 490 for (i = 0; snmp4_net_list[i].name; i++) 491 seq_printf(seq, " %lu", 492 snmp_fold_field(net->mib.net_statistics, 493 snmp4_net_list[i].entry)); 494 495 seq_puts(seq, "\nIpExt:"); 496 for (i = 0; snmp4_ipextstats_list[i].name; i++) 497 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); 498 499 seq_puts(seq, "\nIpExt:"); 500 for (i = 0; snmp4_ipextstats_list[i].name; i++) 501 seq_printf(seq, " %llu", 502 snmp_fold_field64(net->mib.ip_statistics, 503 snmp4_ipextstats_list[i].entry, 504 offsetof(struct ipstats_mib, syncp))); 505 506 seq_putc(seq, '\n'); 507 return 0; 508 } 509 510 static int netstat_seq_open(struct inode *inode, struct file *file) 511 { 512 return single_open_net(inode, file, netstat_seq_show); 513 } 514 515 static const struct file_operations netstat_seq_fops = { 516 .open = netstat_seq_open, 517 .read = seq_read, 518 .llseek = seq_lseek, 519 .release = single_release_net, 520 }; 521 522 static __net_init int ip_proc_init_net(struct net *net) 523 { 524 if (!proc_create("sockstat", 0444, net->proc_net, 525 &sockstat_seq_fops)) 526 goto out_sockstat; 527 if (!proc_create("netstat", 0444, net->proc_net, &netstat_seq_fops)) 528 goto out_netstat; 529 if (!proc_create("snmp", 0444, net->proc_net, &snmp_seq_fops)) 530 goto out_snmp; 531 532 return 0; 533 534 out_snmp: 535 remove_proc_entry("netstat", net->proc_net); 536 out_netstat: 537 remove_proc_entry("sockstat", net->proc_net); 538 out_sockstat: 539 return -ENOMEM; 540 } 541 542 static __net_exit void ip_proc_exit_net(struct net *net) 543 { 544 remove_proc_entry("snmp", net->proc_net); 545 remove_proc_entry("netstat", net->proc_net); 546 remove_proc_entry("sockstat", net->proc_net); 547 } 548 549 static __net_initdata struct pernet_operations ip_proc_ops = { 550 .init = ip_proc_init_net, 551 .exit = ip_proc_exit_net, 552 }; 553 554 int __init ip_misc_proc_init(void) 555 { 556 return register_pernet_subsys(&ip_proc_ops); 557 } 558