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/* 50 * Report socket allocation statistics [mea@utu.fi] 51 */ 52static int sockstat_seq_show(struct seq_file *seq, void *v) 53{ 54 struct net *net = seq->private; 55 unsigned int frag_mem; 56 int orphans, sockets; 57 58 local_bh_disable(); 59 orphans = percpu_counter_sum_positive(&tcp_orphan_count); 60 sockets = proto_sockets_allocated_sum_positive(&tcp_prot); 61 local_bh_enable(); 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(&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 80static int sockstat_seq_open(struct inode *inode, struct file *file) 81{ 82 return single_open_net(inode, file, sockstat_seq_show); 83} 84 85static 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 */ 94static 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 */ 116static 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 138static 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 157static 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 176static 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 188static 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("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED), 203 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), 204 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), 205 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), 206 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), 207 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), 208 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), 209 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), 210 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED), 211 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG), 212 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE), 213 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED), 214 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), 215 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER), 216 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), 217 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), 218 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), 219 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), 220 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), 221 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER), 222 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), 223 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), 224 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), 225 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), 226 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), 227 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), 228 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), 229 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), 230 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), 231 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), 232 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), 233 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), 234 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS), 235 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), 236 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), 237 SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES), 238 SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY), 239 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), 240 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), 241 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED), 242 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), 243 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 244 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 245 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 246 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 247 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), 248 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), 249 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), 250 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), 251 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), 252 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), 253 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), 254 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), 255 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), 256 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), 257 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), 258 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND), 259 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED), 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("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP), 265 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP), 266 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER), 267 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW), 268 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES), 269 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP), 270 SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL), 271 SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE), 272 SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE), 273 SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP), 274 SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE), 275 SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK), 276 SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE), 277 SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE), 278 SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL), 279 SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE), 280 SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL), 281 SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW), 282 SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD), 283 SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES), 284 SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS), 285 SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING), 286 SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV), 287 SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV), 288 SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV), 289 SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS), 290 SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT), 291 SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT), 292 SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND), 293 SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT), 294 SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND), 295 SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV), 296 SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS), 297 SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ), 298 SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2), 299 SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT), 300 SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE), 301 SNMP_MIB_SENTINEL 302}; 303 304static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals, 305 unsigned short *type, int count) 306{ 307 int j; 308 309 if (count) { 310 seq_puts(seq, "\nIcmpMsg:"); 311 for (j = 0; j < count; ++j) 312 seq_printf(seq, " %sType%u", 313 type[j] & 0x100 ? "Out" : "In", 314 type[j] & 0xff); 315 seq_puts(seq, "\nIcmpMsg:"); 316 for (j = 0; j < count; ++j) 317 seq_printf(seq, " %lu", vals[j]); 318 } 319} 320 321static void icmpmsg_put(struct seq_file *seq) 322{ 323#define PERLINE 16 324 325 int i, count; 326 unsigned short type[PERLINE]; 327 unsigned long vals[PERLINE], val; 328 struct net *net = seq->private; 329 330 count = 0; 331 for (i = 0; i < ICMPMSG_MIB_MAX; i++) { 332 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]); 333 if (val) { 334 type[count] = i; 335 vals[count++] = val; 336 } 337 if (count == PERLINE) { 338 icmpmsg_put_line(seq, vals, type, count); 339 count = 0; 340 } 341 } 342 icmpmsg_put_line(seq, vals, type, count); 343 344#undef PERLINE 345} 346 347static void icmp_put(struct seq_file *seq) 348{ 349 int i; 350 struct net *net = seq->private; 351 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs; 352 353 seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors"); 354 for (i = 0; icmpmibmap[i].name != NULL; i++) 355 seq_printf(seq, " In%s", icmpmibmap[i].name); 356 seq_puts(seq, " OutMsgs OutErrors"); 357 for (i = 0; icmpmibmap[i].name != NULL; i++) 358 seq_printf(seq, " Out%s", icmpmibmap[i].name); 359 seq_printf(seq, "\nIcmp: %lu %lu %lu", 360 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS), 361 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS), 362 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS)); 363 for (i = 0; icmpmibmap[i].name != NULL; i++) 364 seq_printf(seq, " %lu", 365 atomic_long_read(ptr + icmpmibmap[i].index)); 366 seq_printf(seq, " %lu %lu", 367 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS), 368 snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS)); 369 for (i = 0; icmpmibmap[i].name != NULL; i++) 370 seq_printf(seq, " %lu", 371 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100))); 372} 373 374/* 375 * Called from the PROCfs module. This outputs /proc/net/snmp. 376 */ 377static int snmp_seq_show(struct seq_file *seq, void *v) 378{ 379 int i; 380 struct net *net = seq->private; 381 382 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 383 384 for (i = 0; snmp4_ipstats_list[i].name != NULL; 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 sysctl_ip_default_ttl); 390 391 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0); 392 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) 393 seq_printf(seq, " %llu", 394 snmp_fold_field64(net->mib.ip_statistics, 395 snmp4_ipstats_list[i].entry, 396 offsetof(struct ipstats_mib, syncp))); 397 398 icmp_put(seq); /* RFC 2011 compatibility */ 399 icmpmsg_put(seq); 400 401 seq_puts(seq, "\nTcp:"); 402 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) 403 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 404 405 seq_puts(seq, "\nTcp:"); 406 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) { 407 /* MaxConn field is signed, RFC 2012 */ 408 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 409 seq_printf(seq, " %ld", 410 snmp_fold_field(net->mib.tcp_statistics, 411 snmp4_tcp_list[i].entry)); 412 else 413 seq_printf(seq, " %lu", 414 snmp_fold_field(net->mib.tcp_statistics, 415 snmp4_tcp_list[i].entry)); 416 } 417 418 seq_puts(seq, "\nUdp:"); 419 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 420 seq_printf(seq, " %s", snmp4_udp_list[i].name); 421 422 seq_puts(seq, "\nUdp:"); 423 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 424 seq_printf(seq, " %lu", 425 snmp_fold_field(net->mib.udp_statistics, 426 snmp4_udp_list[i].entry)); 427 428 /* the UDP and UDP-Lite MIBs are the same */ 429 seq_puts(seq, "\nUdpLite:"); 430 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 431 seq_printf(seq, " %s", snmp4_udp_list[i].name); 432 433 seq_puts(seq, "\nUdpLite:"); 434 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 435 seq_printf(seq, " %lu", 436 snmp_fold_field(net->mib.udplite_statistics, 437 snmp4_udp_list[i].entry)); 438 439 seq_putc(seq, '\n'); 440 return 0; 441} 442 443static int snmp_seq_open(struct inode *inode, struct file *file) 444{ 445 return single_open_net(inode, file, snmp_seq_show); 446} 447 448static const struct file_operations snmp_seq_fops = { 449 .owner = THIS_MODULE, 450 .open = snmp_seq_open, 451 .read = seq_read, 452 .llseek = seq_lseek, 453 .release = single_release_net, 454}; 455 456 457 458/* 459 * Output /proc/net/netstat 460 */ 461static int netstat_seq_show(struct seq_file *seq, void *v) 462{ 463 int i; 464 struct net *net = seq->private; 465 466 seq_puts(seq, "TcpExt:"); 467 for (i = 0; snmp4_net_list[i].name != NULL; i++) 468 seq_printf(seq, " %s", snmp4_net_list[i].name); 469 470 seq_puts(seq, "\nTcpExt:"); 471 for (i = 0; snmp4_net_list[i].name != NULL; i++) 472 seq_printf(seq, " %lu", 473 snmp_fold_field(net->mib.net_statistics, 474 snmp4_net_list[i].entry)); 475 476 seq_puts(seq, "\nIpExt:"); 477 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++) 478 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); 479 480 seq_puts(seq, "\nIpExt:"); 481 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++) 482 seq_printf(seq, " %llu", 483 snmp_fold_field64(net->mib.ip_statistics, 484 snmp4_ipextstats_list[i].entry, 485 offsetof(struct ipstats_mib, syncp))); 486 487 seq_putc(seq, '\n'); 488 return 0; 489} 490 491static int netstat_seq_open(struct inode *inode, struct file *file) 492{ 493 return single_open_net(inode, file, netstat_seq_show); 494} 495 496static const struct file_operations netstat_seq_fops = { 497 .owner = THIS_MODULE, 498 .open = netstat_seq_open, 499 .read = seq_read, 500 .llseek = seq_lseek, 501 .release = single_release_net, 502}; 503 504static __net_init int ip_proc_init_net(struct net *net) 505{ 506 if (!proc_create("sockstat", S_IRUGO, net->proc_net, 507 &sockstat_seq_fops)) 508 goto out_sockstat; 509 if (!proc_create("netstat", S_IRUGO, net->proc_net, &netstat_seq_fops)) 510 goto out_netstat; 511 if (!proc_create("snmp", S_IRUGO, net->proc_net, &snmp_seq_fops)) 512 goto out_snmp; 513 514 return 0; 515 516out_snmp: 517 remove_proc_entry("netstat", net->proc_net); 518out_netstat: 519 remove_proc_entry("sockstat", net->proc_net); 520out_sockstat: 521 return -ENOMEM; 522} 523 524static __net_exit void ip_proc_exit_net(struct net *net) 525{ 526 remove_proc_entry("snmp", net->proc_net); 527 remove_proc_entry("netstat", net->proc_net); 528 remove_proc_entry("sockstat", net->proc_net); 529} 530 531static __net_initdata struct pernet_operations ip_proc_ops = { 532 .init = ip_proc_init_net, 533 .exit = ip_proc_exit_net, 534}; 535 536int __init ip_misc_proc_init(void) 537{ 538 return register_pernet_subsys(&ip_proc_ops); 539} 540 541