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 <net/sock.h> 46 #include <net/raw.h> 47 48 /* 49 * Report socket allocation statistics [mea@utu.fi] 50 */ 51 static int sockstat_seq_show(struct seq_file *seq, void *v) 52 { 53 struct net *net = seq->private; 54 int orphans, sockets; 55 56 local_bh_disable(); 57 orphans = percpu_counter_sum_positive(&tcp_orphan_count); 58 sockets = percpu_counter_sum_positive(&tcp_sockets_allocated); 59 local_bh_enable(); 60 61 socket_seq_show(seq); 62 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n", 63 sock_prot_inuse_get(net, &tcp_prot), orphans, 64 tcp_death_row.tw_count, sockets, 65 atomic_long_read(&tcp_memory_allocated)); 66 seq_printf(seq, "UDP: inuse %d mem %ld\n", 67 sock_prot_inuse_get(net, &udp_prot), 68 atomic_long_read(&udp_memory_allocated)); 69 seq_printf(seq, "UDPLITE: inuse %d\n", 70 sock_prot_inuse_get(net, &udplite_prot)); 71 seq_printf(seq, "RAW: inuse %d\n", 72 sock_prot_inuse_get(net, &raw_prot)); 73 seq_printf(seq, "FRAG: inuse %d memory %d\n", 74 ip_frag_nqueues(net), ip_frag_mem(net)); 75 return 0; 76 } 77 78 static int sockstat_seq_open(struct inode *inode, struct file *file) 79 { 80 return single_open_net(inode, file, sockstat_seq_show); 81 } 82 83 static const struct file_operations sockstat_seq_fops = { 84 .owner = THIS_MODULE, 85 .open = sockstat_seq_open, 86 .read = seq_read, 87 .llseek = seq_lseek, 88 .release = single_release_net, 89 }; 90 91 /* snmp items */ 92 static const struct snmp_mib snmp4_ipstats_list[] = { 93 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS), 94 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS), 95 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS), 96 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 97 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 98 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS), 99 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS), 100 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS), 101 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS), 102 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 103 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 104 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS), 105 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS), 106 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS), 107 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS), 108 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS), 109 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES), 110 SNMP_MIB_SENTINEL 111 }; 112 113 /* Following RFC4293 items are displayed in /proc/net/netstat */ 114 static const struct snmp_mib snmp4_ipextstats_list[] = { 115 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES), 116 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 117 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 118 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 119 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS), 120 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS), 121 SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS), 122 SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS), 123 SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS), 124 SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS), 125 SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS), 126 SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS), 127 SNMP_MIB_SENTINEL 128 }; 129 130 static const struct { 131 const char *name; 132 int index; 133 } icmpmibmap[] = { 134 { "DestUnreachs", ICMP_DEST_UNREACH }, 135 { "TimeExcds", ICMP_TIME_EXCEEDED }, 136 { "ParmProbs", ICMP_PARAMETERPROB }, 137 { "SrcQuenchs", ICMP_SOURCE_QUENCH }, 138 { "Redirects", ICMP_REDIRECT }, 139 { "Echos", ICMP_ECHO }, 140 { "EchoReps", ICMP_ECHOREPLY }, 141 { "Timestamps", ICMP_TIMESTAMP }, 142 { "TimestampReps", ICMP_TIMESTAMPREPLY }, 143 { "AddrMasks", ICMP_ADDRESS }, 144 { "AddrMaskReps", ICMP_ADDRESSREPLY }, 145 { NULL, 0 } 146 }; 147 148 149 static const struct snmp_mib snmp4_tcp_list[] = { 150 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM), 151 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN), 152 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX), 153 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN), 154 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS), 155 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS), 156 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS), 157 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS), 158 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB), 159 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS), 160 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS), 161 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS), 162 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS), 163 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS), 164 SNMP_MIB_SENTINEL 165 }; 166 167 static const struct snmp_mib snmp4_udp_list[] = { 168 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS), 169 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS), 170 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS), 171 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS), 172 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS), 173 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS), 174 SNMP_MIB_SENTINEL 175 }; 176 177 static const struct snmp_mib snmp4_net_list[] = { 178 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), 179 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), 180 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), 181 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), 182 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), 183 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), 184 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), 185 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), 186 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), 187 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), 188 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), 189 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), 190 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), 191 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED), 192 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), 193 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), 194 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), 195 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), 196 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), 197 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), 198 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), 199 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED), 200 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG), 201 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE), 202 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED), 203 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), 204 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER), 205 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), 206 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), 207 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), 208 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), 209 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), 210 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER), 211 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), 212 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), 213 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), 214 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), 215 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), 216 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), 217 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), 218 SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS), 219 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), 220 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), 221 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), 222 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), 223 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), 224 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS), 225 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), 226 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), 227 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), 228 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), 229 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED), 230 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), 231 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 232 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 233 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 234 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 235 SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN), 236 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), 237 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), 238 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), 239 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), 240 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), 241 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), 242 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), 243 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), 244 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), 245 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), 246 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), 247 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND), 248 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED), 249 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED), 250 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED), 251 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK), 252 SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP), 253 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP), 254 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP), 255 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER), 256 SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW), 257 SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES), 258 SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP), 259 SNMP_MIB_SENTINEL 260 }; 261 262 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals, 263 unsigned short *type, int count) 264 { 265 int j; 266 267 if (count) { 268 seq_printf(seq, "\nIcmpMsg:"); 269 for (j = 0; j < count; ++j) 270 seq_printf(seq, " %sType%u", 271 type[j] & 0x100 ? "Out" : "In", 272 type[j] & 0xff); 273 seq_printf(seq, "\nIcmpMsg:"); 274 for (j = 0; j < count; ++j) 275 seq_printf(seq, " %lu", vals[j]); 276 } 277 } 278 279 static void icmpmsg_put(struct seq_file *seq) 280 { 281 #define PERLINE 16 282 283 int i, count; 284 unsigned short type[PERLINE]; 285 unsigned long vals[PERLINE], val; 286 struct net *net = seq->private; 287 288 count = 0; 289 for (i = 0; i < ICMPMSG_MIB_MAX; i++) { 290 val = snmp_fold_field((void __percpu **) net->mib.icmpmsg_statistics, i); 291 if (val) { 292 type[count] = i; 293 vals[count++] = val; 294 } 295 if (count == PERLINE) { 296 icmpmsg_put_line(seq, vals, type, count); 297 count = 0; 298 } 299 } 300 icmpmsg_put_line(seq, vals, type, count); 301 302 #undef PERLINE 303 } 304 305 static void icmp_put(struct seq_file *seq) 306 { 307 int i; 308 struct net *net = seq->private; 309 310 seq_puts(seq, "\nIcmp: InMsgs InErrors"); 311 for (i=0; icmpmibmap[i].name != NULL; i++) 312 seq_printf(seq, " In%s", icmpmibmap[i].name); 313 seq_printf(seq, " OutMsgs OutErrors"); 314 for (i=0; icmpmibmap[i].name != NULL; i++) 315 seq_printf(seq, " Out%s", icmpmibmap[i].name); 316 seq_printf(seq, "\nIcmp: %lu %lu", 317 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INMSGS), 318 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INERRORS)); 319 for (i=0; icmpmibmap[i].name != NULL; i++) 320 seq_printf(seq, " %lu", 321 snmp_fold_field((void __percpu **) net->mib.icmpmsg_statistics, 322 icmpmibmap[i].index)); 323 seq_printf(seq, " %lu %lu", 324 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS), 325 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS)); 326 for (i=0; icmpmibmap[i].name != NULL; i++) 327 seq_printf(seq, " %lu", 328 snmp_fold_field((void __percpu **) net->mib.icmpmsg_statistics, 329 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