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 */ 52 static int sockstat_seq_show(struct seq_file *seq, void *v) 53 { 54 struct net *net = seq->private; 55 int orphans, sockets; 56 57 local_bh_disable(); 58 orphans = percpu_counter_sum_positive(&tcp_orphan_count); 59 sockets = proto_sockets_allocated_sum_positive(&tcp_prot); 60 local_bh_enable(); 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 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 %d memory %d\n", 75 ip_frag_nqueues(net), ip_frag_mem(net)); 76 return 0; 77 } 78 79 static int sockstat_seq_open(struct inode *inode, struct file *file) 80 { 81 return single_open_net(inode, file, sockstat_seq_show); 82 } 83 84 static const struct file_operations sockstat_seq_fops = { 85 .owner = THIS_MODULE, 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 RFC4293 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 SNMP_MIB_SENTINEL 129 }; 130 131 static const struct { 132 const char *name; 133 int index; 134 } icmpmibmap[] = { 135 { "DestUnreachs", ICMP_DEST_UNREACH }, 136 { "TimeExcds", ICMP_TIME_EXCEEDED }, 137 { "ParmProbs", ICMP_PARAMETERPROB }, 138 { "SrcQuenchs", ICMP_SOURCE_QUENCH }, 139 { "Redirects", ICMP_REDIRECT }, 140 { "Echos", ICMP_ECHO }, 141 { "EchoReps", ICMP_ECHOREPLY }, 142 { "Timestamps", ICMP_TIMESTAMP }, 143 { "TimestampReps", ICMP_TIMESTAMPREPLY }, 144 { "AddrMasks", ICMP_ADDRESS }, 145 { "AddrMaskReps", ICMP_ADDRESSREPLY }, 146 { NULL, 0 } 147 }; 148 149 150 static const struct snmp_mib snmp4_tcp_list[] = { 151 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM), 152 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN), 153 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX), 154 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN), 155 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS), 156 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS), 157 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS), 158 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS), 159 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB), 160 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS), 161 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS), 162 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS), 163 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS), 164 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS), 165 SNMP_MIB_SENTINEL 166 }; 167 168 static const struct snmp_mib snmp4_udp_list[] = { 169 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS), 170 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS), 171 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS), 172 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS), 173 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS), 174 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS), 175 SNMP_MIB_SENTINEL 176 }; 177 178 static const struct snmp_mib snmp4_net_list[] = { 179 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), 180 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), 181 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), 182 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), 183 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), 184 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), 185 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), 186 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), 187 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), 188 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), 189 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), 190 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), 191 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), 192 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED), 193 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), 194 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), 195 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), 196 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), 197 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), 198 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), 199 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), 200 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED), 201 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG), 202 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE), 203 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED), 204 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), 205 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER), 206 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), 207 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), 208 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), 209 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), 210 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), 211 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER), 212 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), 213 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), 214 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), 215 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), 216 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), 217 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), 218 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), 219 SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS), 220 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), 221 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), 222 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), 223 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), 224 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), 225 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS), 226 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), 227 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), 228 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), 229 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), 230 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED), 231 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), 232 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 233 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 234 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 235 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 236 SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN), 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("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), 245 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), 246 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), 247 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), 248 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND), 249 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED), 250 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED), 251 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED), 252 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK), 253 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP), 254 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP), 255 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP), 256 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER), 257 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW), 258 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES), 259 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP), 260 SNMP_MIB_SENTINEL 261 }; 262 263 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals, 264 unsigned short *type, int count) 265 { 266 int j; 267 268 if (count) { 269 seq_printf(seq, "\nIcmpMsg:"); 270 for (j = 0; j < count; ++j) 271 seq_printf(seq, " %sType%u", 272 type[j] & 0x100 ? "Out" : "In", 273 type[j] & 0xff); 274 seq_printf(seq, "\nIcmpMsg:"); 275 for (j = 0; j < count; ++j) 276 seq_printf(seq, " %lu", vals[j]); 277 } 278 } 279 280 static void icmpmsg_put(struct seq_file *seq) 281 { 282 #define PERLINE 16 283 284 int i, count; 285 unsigned short type[PERLINE]; 286 unsigned long vals[PERLINE], val; 287 struct net *net = seq->private; 288 289 count = 0; 290 for (i = 0; i < ICMPMSG_MIB_MAX; i++) { 291 val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]); 292 if (val) { 293 type[count] = i; 294 vals[count++] = val; 295 } 296 if (count == PERLINE) { 297 icmpmsg_put_line(seq, vals, type, count); 298 count = 0; 299 } 300 } 301 icmpmsg_put_line(seq, vals, type, count); 302 303 #undef PERLINE 304 } 305 306 static void icmp_put(struct seq_file *seq) 307 { 308 int i; 309 struct net *net = seq->private; 310 atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs; 311 312 seq_puts(seq, "\nIcmp: InMsgs InErrors"); 313 for (i=0; icmpmibmap[i].name != NULL; i++) 314 seq_printf(seq, " In%s", icmpmibmap[i].name); 315 seq_printf(seq, " OutMsgs OutErrors"); 316 for (i=0; icmpmibmap[i].name != NULL; i++) 317 seq_printf(seq, " Out%s", icmpmibmap[i].name); 318 seq_printf(seq, "\nIcmp: %lu %lu", 319 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INMSGS), 320 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INERRORS)); 321 for (i=0; icmpmibmap[i].name != NULL; i++) 322 seq_printf(seq, " %lu", 323 atomic_long_read(ptr + icmpmibmap[i].index)); 324 seq_printf(seq, " %lu %lu", 325 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS), 326 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS)); 327 for (i=0; icmpmibmap[i].name != NULL; i++) 328 seq_printf(seq, " %lu", 329 atomic_long_read(ptr + (icmpmibmap[i].index | 0x100))); 330 } 331 332 /* 333 * Called from the PROCfs module. This outputs /proc/net/snmp. 334 */ 335 static int snmp_seq_show(struct seq_file *seq, void *v) 336 { 337 int i; 338 struct net *net = seq->private; 339 340 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 341 342 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) 343 seq_printf(seq, " %s", snmp4_ipstats_list[i].name); 344 345 seq_printf(seq, "\nIp: %d %d", 346 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2, 347 sysctl_ip_default_ttl); 348 349 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0); 350 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) 351 seq_printf(seq, " %llu", 352 snmp_fold_field64((void __percpu **)net->mib.ip_statistics, 353 snmp4_ipstats_list[i].entry, 354 offsetof(struct ipstats_mib, syncp))); 355 356 icmp_put(seq); /* RFC 2011 compatibility */ 357 icmpmsg_put(seq); 358 359 seq_puts(seq, "\nTcp:"); 360 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) 361 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 362 363 seq_puts(seq, "\nTcp:"); 364 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) { 365 /* MaxConn field is signed, RFC 2012 */ 366 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 367 seq_printf(seq, " %ld", 368 snmp_fold_field((void __percpu **)net->mib.tcp_statistics, 369 snmp4_tcp_list[i].entry)); 370 else 371 seq_printf(seq, " %lu", 372 snmp_fold_field((void __percpu **)net->mib.tcp_statistics, 373 snmp4_tcp_list[i].entry)); 374 } 375 376 seq_puts(seq, "\nUdp:"); 377 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 378 seq_printf(seq, " %s", snmp4_udp_list[i].name); 379 380 seq_puts(seq, "\nUdp:"); 381 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 382 seq_printf(seq, " %lu", 383 snmp_fold_field((void __percpu **)net->mib.udp_statistics, 384 snmp4_udp_list[i].entry)); 385 386 /* the UDP and UDP-Lite MIBs are the same */ 387 seq_puts(seq, "\nUdpLite:"); 388 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 389 seq_printf(seq, " %s", snmp4_udp_list[i].name); 390 391 seq_puts(seq, "\nUdpLite:"); 392 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 393 seq_printf(seq, " %lu", 394 snmp_fold_field((void __percpu **)net->mib.udplite_statistics, 395 snmp4_udp_list[i].entry)); 396 397 seq_putc(seq, '\n'); 398 return 0; 399 } 400 401 static int snmp_seq_open(struct inode *inode, struct file *file) 402 { 403 return single_open_net(inode, file, snmp_seq_show); 404 } 405 406 static const struct file_operations snmp_seq_fops = { 407 .owner = THIS_MODULE, 408 .open = snmp_seq_open, 409 .read = seq_read, 410 .llseek = seq_lseek, 411 .release = single_release_net, 412 }; 413 414 415 416 /* 417 * Output /proc/net/netstat 418 */ 419 static int netstat_seq_show(struct seq_file *seq, void *v) 420 { 421 int i; 422 struct net *net = seq->private; 423 424 seq_puts(seq, "TcpExt:"); 425 for (i = 0; snmp4_net_list[i].name != NULL; i++) 426 seq_printf(seq, " %s", snmp4_net_list[i].name); 427 428 seq_puts(seq, "\nTcpExt:"); 429 for (i = 0; snmp4_net_list[i].name != NULL; i++) 430 seq_printf(seq, " %lu", 431 snmp_fold_field((void __percpu **)net->mib.net_statistics, 432 snmp4_net_list[i].entry)); 433 434 seq_puts(seq, "\nIpExt:"); 435 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++) 436 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); 437 438 seq_puts(seq, "\nIpExt:"); 439 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++) 440 seq_printf(seq, " %llu", 441 snmp_fold_field64((void __percpu **)net->mib.ip_statistics, 442 snmp4_ipextstats_list[i].entry, 443 offsetof(struct ipstats_mib, syncp))); 444 445 seq_putc(seq, '\n'); 446 return 0; 447 } 448 449 static int netstat_seq_open(struct inode *inode, struct file *file) 450 { 451 return single_open_net(inode, file, netstat_seq_show); 452 } 453 454 static const struct file_operations netstat_seq_fops = { 455 .owner = THIS_MODULE, 456 .open = netstat_seq_open, 457 .read = seq_read, 458 .llseek = seq_lseek, 459 .release = single_release_net, 460 }; 461 462 static __net_init int ip_proc_init_net(struct net *net) 463 { 464 if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops)) 465 goto out_sockstat; 466 if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops)) 467 goto out_netstat; 468 if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops)) 469 goto out_snmp; 470 471 return 0; 472 473 out_snmp: 474 proc_net_remove(net, "netstat"); 475 out_netstat: 476 proc_net_remove(net, "sockstat"); 477 out_sockstat: 478 return -ENOMEM; 479 } 480 481 static __net_exit void ip_proc_exit_net(struct net *net) 482 { 483 proc_net_remove(net, "snmp"); 484 proc_net_remove(net, "netstat"); 485 proc_net_remove(net, "sockstat"); 486 } 487 488 static __net_initdata struct pernet_operations ip_proc_ops = { 489 .init = ip_proc_init_net, 490 .exit = ip_proc_exit_net, 491 }; 492 493 int __init ip_misc_proc_init(void) 494 { 495 return register_pernet_subsys(&ip_proc_ops); 496 } 497 498