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 local_bh_disable(); 61 orphans = percpu_counter_sum_positive(&tcp_orphan_count); 62 sockets = proto_sockets_allocated_sum_positive(&tcp_prot); 63 local_bh_enable(); 64 65 socket_seq_show(seq); 66 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n", 67 sock_prot_inuse_get(net, &tcp_prot), orphans, 68 atomic_read(&tcp_death_row.tw_count), sockets, 69 proto_memory_allocated(&tcp_prot)); 70 seq_printf(seq, "UDP: inuse %d mem %ld\n", 71 sock_prot_inuse_get(net, &udp_prot), 72 proto_memory_allocated(&udp_prot)); 73 seq_printf(seq, "UDPLITE: inuse %d\n", 74 sock_prot_inuse_get(net, &udplite_prot)); 75 seq_printf(seq, "RAW: inuse %d\n", 76 sock_prot_inuse_get(net, &raw_prot)); 77 frag_mem = ip_frag_mem(net); 78 seq_printf(seq, "FRAG: inuse %u memory %u\n", !!frag_mem, frag_mem); 79 return 0; 80 } 81 82 static int sockstat_seq_open(struct inode *inode, struct file *file) 83 { 84 return single_open_net(inode, file, sockstat_seq_show); 85 } 86 87 static const struct file_operations sockstat_seq_fops = { 88 .owner = THIS_MODULE, 89 .open = sockstat_seq_open, 90 .read = seq_read, 91 .llseek = seq_lseek, 92 .release = single_release_net, 93 }; 94 95 /* snmp items */ 96 static const struct snmp_mib snmp4_ipstats_list[] = { 97 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS), 98 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS), 99 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS), 100 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 101 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 102 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS), 103 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS), 104 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS), 105 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS), 106 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 107 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 108 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS), 109 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS), 110 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS), 111 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS), 112 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS), 113 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES), 114 SNMP_MIB_SENTINEL 115 }; 116 117 /* Following items are displayed in /proc/net/netstat */ 118 static const struct snmp_mib snmp4_ipextstats_list[] = { 119 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES), 120 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 121 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 122 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 123 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS), 124 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS), 125 SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS), 126 SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS), 127 SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS), 128 SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS), 129 SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS), 130 SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS), 131 /* Non RFC4293 fields */ 132 SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS), 133 SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS), 134 SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS), 135 SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS), 136 SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS), 137 SNMP_MIB_SENTINEL 138 }; 139 140 static const struct { 141 const char *name; 142 int index; 143 } icmpmibmap[] = { 144 { "DestUnreachs", ICMP_DEST_UNREACH }, 145 { "TimeExcds", ICMP_TIME_EXCEEDED }, 146 { "ParmProbs", ICMP_PARAMETERPROB }, 147 { "SrcQuenchs", ICMP_SOURCE_QUENCH }, 148 { "Redirects", ICMP_REDIRECT }, 149 { "Echos", ICMP_ECHO }, 150 { "EchoReps", ICMP_ECHOREPLY }, 151 { "Timestamps", ICMP_TIMESTAMP }, 152 { "TimestampReps", ICMP_TIMESTAMPREPLY }, 153 { "AddrMasks", ICMP_ADDRESS }, 154 { "AddrMaskReps", ICMP_ADDRESSREPLY }, 155 { NULL, 0 } 156 }; 157 158 159 static const struct snmp_mib snmp4_tcp_list[] = { 160 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM), 161 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN), 162 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX), 163 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN), 164 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS), 165 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS), 166 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS), 167 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS), 168 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB), 169 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS), 170 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS), 171 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS), 172 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS), 173 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS), 174 SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS), 175 SNMP_MIB_SENTINEL 176 }; 177 178 static const struct snmp_mib snmp4_udp_list[] = { 179 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS), 180 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS), 181 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS), 182 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS), 183 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS), 184 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS), 185 SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS), 186 SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI), 187 SNMP_MIB_SENTINEL 188 }; 189 190 static const struct snmp_mib snmp4_net_list[] = { 191 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), 192 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), 193 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), 194 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), 195 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), 196 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), 197 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), 198 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), 199 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), 200 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), 201 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), 202 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), 203 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), 204 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED), 205 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), 206 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), 207 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), 208 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), 209 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), 210 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), 211 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), 212 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED), 213 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG), 214 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE), 215 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED), 216 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), 217 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER), 218 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), 219 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), 220 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), 221 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), 222 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), 223 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER), 224 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), 225 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), 226 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), 227 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), 228 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), 229 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), 230 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), 231 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), 232 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), 233 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), 234 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), 235 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), 236 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS), 237 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), 238 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), 239 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES), 240 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY), 241 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), 242 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), 243 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED), 244 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), 245 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 246 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 247 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 248 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 249 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), 250 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), 251 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), 252 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), 253 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), 254 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), 255 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), 256 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), 257 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), 258 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), 259 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), 260 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND), 261 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED), 262 SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE), 263 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED), 264 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED), 265 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK), 266 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP), 267 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP), 268 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP), 269 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER), 270 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW), 271 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES), 272 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP), 273 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL), 274 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE), 275 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE), 276 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP), 277 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE), 278 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK), 279 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE), 280 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE), 281 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL), 282 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE), 283 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL), 284 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW), 285 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD), 286 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES), 287 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS), 288 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING), 289 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV), 290 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV), 291 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV), 292 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS), 293 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT), 294 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT), 295 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND), 296 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT), 297 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND), 298 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV), 299 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS), 300 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ), 301 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2), 302 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT), 303 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE), 304 SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE), 305 SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE), 306 SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL), 307 SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS), 308 SNMP_MIB_SENTINEL 309 }; 310 311 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals, 312 unsigned short *type, int count) 313 { 314 int j; 315 316 if (count) { 317 seq_puts(seq, "\nIcmpMsg:"); 318 for (j = 0; j < count; ++j) 319 seq_printf(seq, " %sType%u", 320 type[j] & 0x100 ? "Out" : "In", 321 type[j] & 0xff); 322 seq_puts(seq, "\nIcmpMsg:"); 323 for (j = 0; j < count; ++j) 324 seq_printf(seq, " %lu", vals[j]); 325 } 326 } 327 328 static void icmpmsg_put(struct seq_file *seq) 329 { 330 #define PERLINE 16 331 332 int i, count; 333 unsigned short type[PERLINE]; 334 unsigned long vals[PERLINE], val; 335 struct net *net = seq->private; 336 337 count = 0; 338 for (i = 0; i < ICMPMSG_MIB_MAX; i++) { 339 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]); 340 if (val) { 341 type[count] = i; 342 vals[count++] = val; 343 } 344 if (count == PERLINE) { 345 icmpmsg_put_line(seq, vals, type, count); 346 count = 0; 347 } 348 } 349 icmpmsg_put_line(seq, vals, type, count); 350 351 #undef PERLINE 352 } 353 354 static void icmp_put(struct seq_file *seq) 355 { 356 int i; 357 struct net *net = seq->private; 358 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs; 359 360 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors"); 361 for (i = 0; icmpmibmap[i].name; i++) 362 seq_printf(seq, " In%s", icmpmibmap[i].name); 363 seq_puts(seq, " OutMsgs OutErrors"); 364 for (i = 0; icmpmibmap[i].name; i++) 365 seq_printf(seq, " Out%s", icmpmibmap[i].name); 366 seq_printf(seq, "\nIcmp: %lu %lu %lu", 367 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS), 368 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS), 369 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS)); 370 for (i = 0; icmpmibmap[i].name; i++) 371 seq_printf(seq, " %lu", 372 atomic_long_read(ptr + icmpmibmap[i].index)); 373 seq_printf(seq, " %lu %lu", 374 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS), 375 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS)); 376 for (i = 0; icmpmibmap[i].name; i++) 377 seq_printf(seq, " %lu", 378 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100))); 379 } 380 381 /* 382 * Called from the PROCfs module. This outputs /proc/net/snmp. 383 */ 384 static int snmp_seq_show_ipstats(struct seq_file *seq, void *v) 385 { 386 struct net *net = seq->private; 387 u64 buff64[IPSTATS_MIB_MAX]; 388 int i; 389 390 memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64)); 391 392 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 393 for (i = 0; snmp4_ipstats_list[i].name; i++) 394 seq_printf(seq, " %s", snmp4_ipstats_list[i].name); 395 396 seq_printf(seq, "\nIp: %d %d", 397 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2, 398 net->ipv4.sysctl_ip_default_ttl); 399 400 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0); 401 snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list, 402 net->mib.ip_statistics, 403 offsetof(struct ipstats_mib, syncp)); 404 for (i = 0; snmp4_ipstats_list[i].name; i++) 405 seq_printf(seq, " %llu", buff64[i]); 406 407 return 0; 408 } 409 410 static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v) 411 { 412 unsigned long buff[TCPUDP_MIB_MAX]; 413 struct net *net = seq->private; 414 int i; 415 416 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 417 418 seq_puts(seq, "\nTcp:"); 419 for (i = 0; snmp4_tcp_list[i].name; i++) 420 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 421 422 seq_puts(seq, "\nTcp:"); 423 snmp_get_cpu_field_batch(buff, snmp4_tcp_list, 424 net->mib.tcp_statistics); 425 for (i = 0; snmp4_tcp_list[i].name; i++) { 426 /* MaxConn field is signed, RFC 2012 */ 427 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 428 seq_printf(seq, " %ld", buff[i]); 429 else 430 seq_printf(seq, " %lu", buff[i]); 431 } 432 433 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 434 435 snmp_get_cpu_field_batch(buff, snmp4_udp_list, 436 net->mib.udp_statistics); 437 seq_puts(seq, "\nUdp:"); 438 for (i = 0; snmp4_udp_list[i].name; i++) 439 seq_printf(seq, " %s", snmp4_udp_list[i].name); 440 seq_puts(seq, "\nUdp:"); 441 for (i = 0; snmp4_udp_list[i].name; i++) 442 seq_printf(seq, " %lu", buff[i]); 443 444 memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long)); 445 446 /* the UDP and UDP-Lite MIBs are the same */ 447 seq_puts(seq, "\nUdpLite:"); 448 snmp_get_cpu_field_batch(buff, snmp4_udp_list, 449 net->mib.udplite_statistics); 450 for (i = 0; snmp4_udp_list[i].name; i++) 451 seq_printf(seq, " %s", snmp4_udp_list[i].name); 452 seq_puts(seq, "\nUdpLite:"); 453 for (i = 0; snmp4_udp_list[i].name; i++) 454 seq_printf(seq, " %lu", buff[i]); 455 456 seq_putc(seq, '\n'); 457 return 0; 458 } 459 460 static int snmp_seq_show(struct seq_file *seq, void *v) 461 { 462 snmp_seq_show_ipstats(seq, v); 463 464 icmp_put(seq); /* RFC 2011 compatibility */ 465 icmpmsg_put(seq); 466 467 snmp_seq_show_tcp_udp(seq, v); 468 469 return 0; 470 } 471 472 static int snmp_seq_open(struct inode *inode, struct file *file) 473 { 474 return single_open_net(inode, file, snmp_seq_show); 475 } 476 477 static const struct file_operations snmp_seq_fops = { 478 .owner = THIS_MODULE, 479 .open = snmp_seq_open, 480 .read = seq_read, 481 .llseek = seq_lseek, 482 .release = single_release_net, 483 }; 484 485 486 487 /* 488 * Output /proc/net/netstat 489 */ 490 static int netstat_seq_show(struct seq_file *seq, void *v) 491 { 492 int i; 493 struct net *net = seq->private; 494 495 seq_puts(seq, "TcpExt:"); 496 for (i = 0; snmp4_net_list[i].name; i++) 497 seq_printf(seq, " %s", snmp4_net_list[i].name); 498 499 seq_puts(seq, "\nTcpExt:"); 500 for (i = 0; snmp4_net_list[i].name; i++) 501 seq_printf(seq, " %lu", 502 snmp_fold_field(net->mib.net_statistics, 503 snmp4_net_list[i].entry)); 504 505 seq_puts(seq, "\nIpExt:"); 506 for (i = 0; snmp4_ipextstats_list[i].name; i++) 507 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); 508 509 seq_puts(seq, "\nIpExt:"); 510 for (i = 0; snmp4_ipextstats_list[i].name; i++) 511 seq_printf(seq, " %llu", 512 snmp_fold_field64(net->mib.ip_statistics, 513 snmp4_ipextstats_list[i].entry, 514 offsetof(struct ipstats_mib, syncp))); 515 516 seq_putc(seq, '\n'); 517 return 0; 518 } 519 520 static int netstat_seq_open(struct inode *inode, struct file *file) 521 { 522 return single_open_net(inode, file, netstat_seq_show); 523 } 524 525 static const struct file_operations netstat_seq_fops = { 526 .owner = THIS_MODULE, 527 .open = netstat_seq_open, 528 .read = seq_read, 529 .llseek = seq_lseek, 530 .release = single_release_net, 531 }; 532 533 static __net_init int ip_proc_init_net(struct net *net) 534 { 535 if (!proc_create("sockstat", S_IRUGO, net->proc_net, 536 &sockstat_seq_fops)) 537 goto out_sockstat; 538 if (!proc_create("netstat", S_IRUGO, net->proc_net, &netstat_seq_fops)) 539 goto out_netstat; 540 if (!proc_create("snmp", S_IRUGO, net->proc_net, &snmp_seq_fops)) 541 goto out_snmp; 542 543 return 0; 544 545 out_snmp: 546 remove_proc_entry("netstat", net->proc_net); 547 out_netstat: 548 remove_proc_entry("sockstat", net->proc_net); 549 out_sockstat: 550 return -ENOMEM; 551 } 552 553 static __net_exit void ip_proc_exit_net(struct net *net) 554 { 555 remove_proc_entry("snmp", net->proc_net); 556 remove_proc_entry("netstat", net->proc_net); 557 remove_proc_entry("sockstat", net->proc_net); 558 } 559 560 static __net_initdata struct pernet_operations ip_proc_ops = { 561 .init = ip_proc_init_net, 562 .exit = ip_proc_exit_net, 563 }; 564 565 int __init ip_misc_proc_init(void) 566 { 567 return register_pernet_subsys(&ip_proc_ops); 568 } 569 570