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 unsigned int frag_mem; 58 int orphans, sockets; 59 60 orphans = percpu_counter_sum_positive(&tcp_orphan_count); 61 sockets = proto_sockets_allocated_sum_positive(&tcp_prot); 62 63 socket_seq_show(seq); 64 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n", 65 sock_prot_inuse_get(net, &tcp_prot), orphans, 66 atomic_read(&net->ipv4.tcp_death_row.tw_count), sockets, 67 proto_memory_allocated(&tcp_prot)); 68 seq_printf(seq, "UDP: inuse %d mem %ld\n", 69 sock_prot_inuse_get(net, &udp_prot), 70 proto_memory_allocated(&udp_prot)); 71 seq_printf(seq, "UDPLITE: inuse %d\n", 72 sock_prot_inuse_get(net, &udplite_prot)); 73 seq_printf(seq, "RAW: inuse %d\n", 74 sock_prot_inuse_get(net, &raw_prot)); 75 frag_mem = ip_frag_mem(net); 76 seq_printf(seq, "FRAG: inuse %u memory %u\n", !!frag_mem, frag_mem); 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 .owner = THIS_MODULE, 87 .open = sockstat_seq_open, 88 .read = seq_read, 89 .llseek = seq_lseek, 90 .release = single_release_net, 91 }; 92 93 /* snmp items */ 94 static const struct snmp_mib snmp4_ipstats_list[] = { 95 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS), 96 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS), 97 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS), 98 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 99 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 100 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS), 101 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS), 102 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS), 103 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS), 104 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 105 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 106 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS), 107 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS), 108 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS), 109 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS), 110 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS), 111 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES), 112 SNMP_MIB_SENTINEL 113 }; 114 115 /* Following items are displayed in /proc/net/netstat */ 116 static const struct snmp_mib snmp4_ipextstats_list[] = { 117 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES), 118 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 119 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 120 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 121 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS), 122 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS), 123 SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS), 124 SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS), 125 SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS), 126 SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS), 127 SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS), 128 SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS), 129 /* Non RFC4293 fields */ 130 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS), 131 SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS), 132 SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS), 133 SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS), 134 SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS), 135 SNMP_MIB_SENTINEL 136 }; 137 138 static const struct { 139 const char *name; 140 int index; 141 } icmpmibmap[] = { 142 { "DestUnreachs", ICMP_DEST_UNREACH }, 143 { "TimeExcds", ICMP_TIME_EXCEEDED }, 144 { "ParmProbs", ICMP_PARAMETERPROB }, 145 { "SrcQuenchs", ICMP_SOURCE_QUENCH }, 146 { "Redirects", ICMP_REDIRECT }, 147 { "Echos", ICMP_ECHO }, 148 { "EchoReps", ICMP_ECHOREPLY }, 149 { "Timestamps", ICMP_TIMESTAMP }, 150 { "TimestampReps", ICMP_TIMESTAMPREPLY }, 151 { "AddrMasks", ICMP_ADDRESS }, 152 { "AddrMaskReps", ICMP_ADDRESSREPLY }, 153 { NULL, 0 } 154 }; 155 156 157 static const struct snmp_mib snmp4_tcp_list[] = { 158 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM), 159 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN), 160 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX), 161 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN), 162 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS), 163 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS), 164 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS), 165 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS), 166 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB), 167 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS), 168 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS), 169 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS), 170 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS), 171 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS), 172 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS), 173 SNMP_MIB_SENTINEL 174 }; 175 176 static const struct snmp_mib snmp4_udp_list[] = { 177 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS), 178 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS), 179 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS), 180 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS), 181 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS), 182 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS), 183 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS), 184 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI), 185 SNMP_MIB_SENTINEL 186 }; 187 188 static const struct snmp_mib snmp4_net_list[] = { 189 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), 190 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), 191 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), 192 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), 193 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), 194 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), 195 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), 196 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), 197 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), 198 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), 199 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), 200 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), 201 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), 202 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), 203 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), 204 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), 205 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), 206 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), 207 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), 208 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), 209 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED), 210 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG), 211 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE), 212 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED), 213 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), 214 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER), 215 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), 216 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), 217 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), 218 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), 219 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), 220 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER), 221 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), 222 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), 223 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), 224 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), 225 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), 226 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), 227 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), 228 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), 229 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), 230 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), 231 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), 232 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), 233 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS), 234 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), 235 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), 236 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES), 237 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY), 238 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), 239 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), 240 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED), 241 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), 242 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 243 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 244 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 245 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 246 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), 247 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), 248 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), 249 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), 250 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), 251 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), 252 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), 253 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), 254 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), 255 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), 256 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), 257 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND), 258 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED), 259 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE), 260 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED), 261 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED), 262 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK), 263 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP), 264 SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP), 265 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP), 266 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP), 267 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER), 268 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW), 269 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES), 270 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP), 271 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL), 272 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE), 273 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE), 274 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP), 275 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE), 276 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK), 277 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE), 278 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE), 279 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL), 280 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE), 281 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL), 282 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW), 283 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD), 284 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES), 285 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS), 286 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING), 287 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV), 288 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV), 289 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV), 290 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS), 291 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT), 292 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT), 293 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND), 294 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT), 295 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND), 296 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV), 297 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS), 298 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ), 299 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2), 300 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT), 301 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE), 302 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE), 303 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE), 304 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL), 305 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS), 306 SNMP_MIB_SENTINEL 307 }; 308 309 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals, 310 unsigned short *type, int count) 311 { 312 int j; 313 314 if (count) { 315 seq_puts(seq, "\nIcmpMsg:"); 316 for (j = 0; j < count; ++j) 317 seq_printf(seq, " %sType%u", 318 type[j] & 0x100 ? "Out" : "In", 319 type[j] & 0xff); 320 seq_puts(seq, "\nIcmpMsg:"); 321 for (j = 0; j < count; ++j) 322 seq_printf(seq, " %lu", vals[j]); 323 } 324 } 325 326 static void icmpmsg_put(struct seq_file *seq) 327 { 328 #define PERLINE 16 329 330 int i, count; 331 unsigned short type[PERLINE]; 332 unsigned long vals[PERLINE], val; 333 struct net *net = seq->private; 334 335 count = 0; 336 for (i = 0; i < ICMPMSG_MIB_MAX; i++) { 337 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]); 338 if (val) { 339 type[count] = i; 340 vals[count++] = val; 341 } 342 if (count == PERLINE) { 343 icmpmsg_put_line(seq, vals, type, count); 344 count = 0; 345 } 346 } 347 icmpmsg_put_line(seq, vals, type, count); 348 349 #undef PERLINE 350 } 351 352 static void icmp_put(struct seq_file *seq) 353 { 354 int i; 355 struct net *net = seq->private; 356 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs; 357 358 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors"); 359 for (i = 0; icmpmibmap[i].name; i++) 360 seq_printf(seq, " In%s", icmpmibmap[i].name); 361 seq_puts(seq, " OutMsgs OutErrors"); 362 for (i = 0; icmpmibmap[i].name; i++) 363 seq_printf(seq, " Out%s", icmpmibmap[i].name); 364 seq_printf(seq, "\nIcmp: %lu %lu %lu", 365 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS), 366 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS), 367 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS)); 368 for (i = 0; icmpmibmap[i].name; i++) 369 seq_printf(seq, " %lu", 370 atomic_long_read(ptr + icmpmibmap[i].index)); 371 seq_printf(seq, " %lu %lu", 372 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS), 373 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS)); 374 for (i = 0; icmpmibmap[i].name; i++) 375 seq_printf(seq, " %lu", 376 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100))); 377 } 378 379 /* 380 * Called from the PROCfs module. This outputs /proc/net/snmp. 381 */ 382 static int snmp_seq_show_ipstats(struct seq_file *seq, void *v) 383 { 384 struct net *net = seq->private; 385 u64 buff64[IPSTATS_MIB_MAX]; 386 int i; 387 388 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64)); 389 390 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 391 for (i = 0; snmp4_ipstats_list[i].name; i++) 392 seq_printf(seq, " %s", snmp4_ipstats_list[i].name); 393 394 seq_printf(seq, "\nIp: %d %d", 395 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2, 396 net->ipv4.sysctl_ip_default_ttl); 397 398 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0); 399 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list, 400 net->mib.ip_statistics, 401 offsetof(struct ipstats_mib, syncp)); 402 for (i = 0; snmp4_ipstats_list[i].name; i++) 403 seq_printf(seq, " %llu", buff64[i]); 404 405 return 0; 406 } 407 408 static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v) 409 { 410 unsigned long buff[TCPUDP_MIB_MAX]; 411 struct net *net = seq->private; 412 int i; 413 414 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 415 416 seq_puts(seq, "\nTcp:"); 417 for (i = 0; snmp4_tcp_list[i].name; i++) 418 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 419 420 seq_puts(seq, "\nTcp:"); 421 snmp_get_cpu_field_batch(buff, snmp4_tcp_list, 422 net->mib.tcp_statistics); 423 for (i = 0; snmp4_tcp_list[i].name; i++) { 424 /* MaxConn field is signed, RFC 2012 */ 425 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 426 seq_printf(seq, " %ld", buff[i]); 427 else 428 seq_printf(seq, " %lu", buff[i]); 429 } 430 431 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 432 433 snmp_get_cpu_field_batch(buff, snmp4_udp_list, 434 net->mib.udp_statistics); 435 seq_puts(seq, "\nUdp:"); 436 for (i = 0; snmp4_udp_list[i].name; i++) 437 seq_printf(seq, " %s", snmp4_udp_list[i].name); 438 seq_puts(seq, "\nUdp:"); 439 for (i = 0; snmp4_udp_list[i].name; i++) 440 seq_printf(seq, " %lu", buff[i]); 441 442 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 443 444 /* the UDP and UDP-Lite MIBs are the same */ 445 seq_puts(seq, "\nUdpLite:"); 446 snmp_get_cpu_field_batch(buff, snmp4_udp_list, 447 net->mib.udplite_statistics); 448 for (i = 0; snmp4_udp_list[i].name; i++) 449 seq_printf(seq, " %s", snmp4_udp_list[i].name); 450 seq_puts(seq, "\nUdpLite:"); 451 for (i = 0; snmp4_udp_list[i].name; i++) 452 seq_printf(seq, " %lu", buff[i]); 453 454 seq_putc(seq, '\n'); 455 return 0; 456 } 457 458 static int snmp_seq_show(struct seq_file *seq, void *v) 459 { 460 snmp_seq_show_ipstats(seq, v); 461 462 icmp_put(seq); /* RFC 2011 compatibility */ 463 icmpmsg_put(seq); 464 465 snmp_seq_show_tcp_udp(seq, v); 466 467 return 0; 468 } 469 470 static int snmp_seq_open(struct inode *inode, struct file *file) 471 { 472 return single_open_net(inode, file, snmp_seq_show); 473 } 474 475 static const struct file_operations snmp_seq_fops = { 476 .owner = THIS_MODULE, 477 .open = snmp_seq_open, 478 .read = seq_read, 479 .llseek = seq_lseek, 480 .release = single_release_net, 481 }; 482 483 484 485 /* 486 * Output /proc/net/netstat 487 */ 488 static int netstat_seq_show(struct seq_file *seq, void *v) 489 { 490 int i; 491 struct net *net = seq->private; 492 493 seq_puts(seq, "TcpExt:"); 494 for (i = 0; snmp4_net_list[i].name; i++) 495 seq_printf(seq, " %s", snmp4_net_list[i].name); 496 497 seq_puts(seq, "\nTcpExt:"); 498 for (i = 0; snmp4_net_list[i].name; i++) 499 seq_printf(seq, " %lu", 500 snmp_fold_field(net->mib.net_statistics, 501 snmp4_net_list[i].entry)); 502 503 seq_puts(seq, "\nIpExt:"); 504 for (i = 0; snmp4_ipextstats_list[i].name; i++) 505 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); 506 507 seq_puts(seq, "\nIpExt:"); 508 for (i = 0; snmp4_ipextstats_list[i].name; i++) 509 seq_printf(seq, " %llu", 510 snmp_fold_field64(net->mib.ip_statistics, 511 snmp4_ipextstats_list[i].entry, 512 offsetof(struct ipstats_mib, syncp))); 513 514 seq_putc(seq, '\n'); 515 return 0; 516 } 517 518 static int netstat_seq_open(struct inode *inode, struct file *file) 519 { 520 return single_open_net(inode, file, netstat_seq_show); 521 } 522 523 static const struct file_operations netstat_seq_fops = { 524 .owner = THIS_MODULE, 525 .open = netstat_seq_open, 526 .read = seq_read, 527 .llseek = seq_lseek, 528 .release = single_release_net, 529 }; 530 531 static __net_init int ip_proc_init_net(struct net *net) 532 { 533 if (!proc_create("sockstat", S_IRUGO, net->proc_net, 534 &sockstat_seq_fops)) 535 goto out_sockstat; 536 if (!proc_create("netstat", S_IRUGO, net->proc_net, &netstat_seq_fops)) 537 goto out_netstat; 538 if (!proc_create("snmp", S_IRUGO, net->proc_net, &snmp_seq_fops)) 539 goto out_snmp; 540 541 return 0; 542 543 out_snmp: 544 remove_proc_entry("netstat", net->proc_net); 545 out_netstat: 546 remove_proc_entry("sockstat", net->proc_net); 547 out_sockstat: 548 return -ENOMEM; 549 } 550 551 static __net_exit void ip_proc_exit_net(struct net *net) 552 { 553 remove_proc_entry("snmp", net->proc_net); 554 remove_proc_entry("netstat", net->proc_net); 555 remove_proc_entry("sockstat", net->proc_net); 556 } 557 558 static __net_initdata struct pernet_operations ip_proc_ops = { 559 .init = ip_proc_init_net, 560 .exit = ip_proc_exit_net, 561 }; 562 563 int __init ip_misc_proc_init(void) 564 { 565 return register_pernet_subsys(&ip_proc_ops); 566 } 567 568