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/inetdevice.h> 42 #include <linux/proc_fs.h> 43 #include <linux/seq_file.h> 44 #include <net/sock.h> 45 #include <net/raw.h> 46 47 /* 48 * Report socket allocation statistics [mea@utu.fi] 49 */ 50 static int sockstat_seq_show(struct seq_file *seq, void *v) 51 { 52 struct net *net = seq->private; 53 54 socket_seq_show(seq); 55 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n", 56 sock_prot_inuse_get(net, &tcp_prot), 57 atomic_read(&tcp_orphan_count), 58 tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated), 59 atomic_read(&tcp_memory_allocated)); 60 seq_printf(seq, "UDP: inuse %d mem %d\n", 61 sock_prot_inuse_get(net, &udp_prot), 62 atomic_read(&udp_memory_allocated)); 63 seq_printf(seq, "UDPLITE: inuse %d\n", 64 sock_prot_inuse_get(net, &udplite_prot)); 65 seq_printf(seq, "RAW: inuse %d\n", 66 sock_prot_inuse_get(net, &raw_prot)); 67 seq_printf(seq, "FRAG: inuse %d memory %d\n", 68 ip_frag_nqueues(net), ip_frag_mem(net)); 69 return 0; 70 } 71 72 static int sockstat_seq_open(struct inode *inode, struct file *file) 73 { 74 return single_open_net(inode, file, sockstat_seq_show); 75 } 76 77 static const struct file_operations sockstat_seq_fops = { 78 .owner = THIS_MODULE, 79 .open = sockstat_seq_open, 80 .read = seq_read, 81 .llseek = seq_lseek, 82 .release = single_release_net, 83 }; 84 85 /* snmp items */ 86 static const struct snmp_mib snmp4_ipstats_list[] = { 87 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES), 88 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS), 89 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS), 90 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 91 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 92 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS), 93 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS), 94 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS), 95 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS), 96 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 97 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 98 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS), 99 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS), 100 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS), 101 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS), 102 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS), 103 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES), 104 SNMP_MIB_SENTINEL 105 }; 106 107 /* Following RFC4293 items are displayed in /proc/net/netstat */ 108 static const struct snmp_mib snmp4_ipextstats_list[] = { 109 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES), 110 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 111 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 112 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 113 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS), 114 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS), 115 SNMP_MIB_SENTINEL 116 }; 117 118 static struct { 119 char *name; 120 int index; 121 } icmpmibmap[] = { 122 { "DestUnreachs", ICMP_DEST_UNREACH }, 123 { "TimeExcds", ICMP_TIME_EXCEEDED }, 124 { "ParmProbs", ICMP_PARAMETERPROB }, 125 { "SrcQuenchs", ICMP_SOURCE_QUENCH }, 126 { "Redirects", ICMP_REDIRECT }, 127 { "Echos", ICMP_ECHO }, 128 { "EchoReps", ICMP_ECHOREPLY }, 129 { "Timestamps", ICMP_TIMESTAMP }, 130 { "TimestampReps", ICMP_TIMESTAMPREPLY }, 131 { "AddrMasks", ICMP_ADDRESS }, 132 { "AddrMaskReps", ICMP_ADDRESSREPLY }, 133 { NULL, 0 } 134 }; 135 136 137 static const struct snmp_mib snmp4_tcp_list[] = { 138 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM), 139 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN), 140 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX), 141 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN), 142 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS), 143 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS), 144 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS), 145 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS), 146 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB), 147 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS), 148 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS), 149 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS), 150 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS), 151 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS), 152 SNMP_MIB_SENTINEL 153 }; 154 155 static const struct snmp_mib snmp4_udp_list[] = { 156 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS), 157 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS), 158 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS), 159 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS), 160 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS), 161 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS), 162 SNMP_MIB_SENTINEL 163 }; 164 165 static const struct snmp_mib snmp4_net_list[] = { 166 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), 167 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), 168 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), 169 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), 170 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), 171 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), 172 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), 173 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), 174 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), 175 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), 176 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), 177 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), 178 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), 179 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED), 180 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), 181 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), 182 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), 183 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), 184 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), 185 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), 186 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), 187 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED), 188 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG), 189 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE), 190 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED), 191 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), 192 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER), 193 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), 194 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), 195 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), 196 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), 197 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), 198 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER), 199 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), 200 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), 201 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), 202 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), 203 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), 204 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), 205 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), 206 SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS), 207 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), 208 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), 209 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), 210 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), 211 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), 212 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS), 213 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), 214 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), 215 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), 216 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), 217 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED), 218 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), 219 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 220 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 221 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 222 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 223 SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN), 224 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), 225 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), 226 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), 227 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), 228 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), 229 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), 230 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), 231 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), 232 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), 233 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), 234 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), 235 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND), 236 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED), 237 SNMP_MIB_SENTINEL 238 }; 239 240 static void icmpmsg_put(struct seq_file *seq) 241 { 242 #define PERLINE 16 243 244 int j, i, count; 245 static int out[PERLINE]; 246 struct net *net = seq->private; 247 248 count = 0; 249 for (i = 0; i < ICMPMSG_MIB_MAX; i++) { 250 251 if (snmp_fold_field((void **) net->mib.icmpmsg_statistics, i)) 252 out[count++] = i; 253 if (count < PERLINE) 254 continue; 255 256 seq_printf(seq, "\nIcmpMsg:"); 257 for (j = 0; j < PERLINE; ++j) 258 seq_printf(seq, " %sType%u", i & 0x100 ? "Out" : "In", 259 i & 0xff); 260 seq_printf(seq, "\nIcmpMsg: "); 261 for (j = 0; j < PERLINE; ++j) 262 seq_printf(seq, " %lu", 263 snmp_fold_field((void **) net->mib.icmpmsg_statistics, 264 out[j])); 265 seq_putc(seq, '\n'); 266 } 267 if (count) { 268 seq_printf(seq, "\nIcmpMsg:"); 269 for (j = 0; j < count; ++j) 270 seq_printf(seq, " %sType%u", out[j] & 0x100 ? "Out" : 271 "In", out[j] & 0xff); 272 seq_printf(seq, "\nIcmpMsg:"); 273 for (j = 0; j < count; ++j) 274 seq_printf(seq, " %lu", snmp_fold_field((void **) 275 net->mib.icmpmsg_statistics, out[j])); 276 } 277 278 #undef PERLINE 279 } 280 281 static void icmp_put(struct seq_file *seq) 282 { 283 int i; 284 struct net *net = seq->private; 285 286 seq_puts(seq, "\nIcmp: InMsgs InErrors"); 287 for (i=0; icmpmibmap[i].name != NULL; i++) 288 seq_printf(seq, " In%s", icmpmibmap[i].name); 289 seq_printf(seq, " OutMsgs OutErrors"); 290 for (i=0; icmpmibmap[i].name != NULL; i++) 291 seq_printf(seq, " Out%s", icmpmibmap[i].name); 292 seq_printf(seq, "\nIcmp: %lu %lu", 293 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INMSGS), 294 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INERRORS)); 295 for (i=0; icmpmibmap[i].name != NULL; i++) 296 seq_printf(seq, " %lu", 297 snmp_fold_field((void **) net->mib.icmpmsg_statistics, 298 icmpmibmap[i].index)); 299 seq_printf(seq, " %lu %lu", 300 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS), 301 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS)); 302 for (i=0; icmpmibmap[i].name != NULL; i++) 303 seq_printf(seq, " %lu", 304 snmp_fold_field((void **) net->mib.icmpmsg_statistics, 305 icmpmibmap[i].index | 0x100)); 306 } 307 308 /* 309 * Called from the PROCfs module. This outputs /proc/net/snmp. 310 */ 311 static int snmp_seq_show(struct seq_file *seq, void *v) 312 { 313 int i; 314 struct net *net = seq->private; 315 316 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 317 318 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) 319 seq_printf(seq, " %s", snmp4_ipstats_list[i].name); 320 321 seq_printf(seq, "\nIp: %d %d", 322 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2, 323 sysctl_ip_default_ttl); 324 325 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) 326 seq_printf(seq, " %lu", 327 snmp_fold_field((void **)net->mib.ip_statistics, 328 snmp4_ipstats_list[i].entry)); 329 330 icmp_put(seq); /* RFC 2011 compatibility */ 331 icmpmsg_put(seq); 332 333 seq_puts(seq, "\nTcp:"); 334 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) 335 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 336 337 seq_puts(seq, "\nTcp:"); 338 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) { 339 /* MaxConn field is signed, RFC 2012 */ 340 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 341 seq_printf(seq, " %ld", 342 snmp_fold_field((void **)net->mib.tcp_statistics, 343 snmp4_tcp_list[i].entry)); 344 else 345 seq_printf(seq, " %lu", 346 snmp_fold_field((void **)net->mib.tcp_statistics, 347 snmp4_tcp_list[i].entry)); 348 } 349 350 seq_puts(seq, "\nUdp:"); 351 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 352 seq_printf(seq, " %s", snmp4_udp_list[i].name); 353 354 seq_puts(seq, "\nUdp:"); 355 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 356 seq_printf(seq, " %lu", 357 snmp_fold_field((void **)net->mib.udp_statistics, 358 snmp4_udp_list[i].entry)); 359 360 /* the UDP and UDP-Lite MIBs are the same */ 361 seq_puts(seq, "\nUdpLite:"); 362 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 363 seq_printf(seq, " %s", snmp4_udp_list[i].name); 364 365 seq_puts(seq, "\nUdpLite:"); 366 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 367 seq_printf(seq, " %lu", 368 snmp_fold_field((void **)net->mib.udplite_statistics, 369 snmp4_udp_list[i].entry)); 370 371 seq_putc(seq, '\n'); 372 return 0; 373 } 374 375 static int snmp_seq_open(struct inode *inode, struct file *file) 376 { 377 return single_open_net(inode, file, snmp_seq_show); 378 } 379 380 static const struct file_operations snmp_seq_fops = { 381 .owner = THIS_MODULE, 382 .open = snmp_seq_open, 383 .read = seq_read, 384 .llseek = seq_lseek, 385 .release = single_release_net, 386 }; 387 388 389 390 /* 391 * Output /proc/net/netstat 392 */ 393 static int netstat_seq_show(struct seq_file *seq, void *v) 394 { 395 int i; 396 struct net *net = seq->private; 397 398 seq_puts(seq, "TcpExt:"); 399 for (i = 0; snmp4_net_list[i].name != NULL; i++) 400 seq_printf(seq, " %s", snmp4_net_list[i].name); 401 402 seq_puts(seq, "\nTcpExt:"); 403 for (i = 0; snmp4_net_list[i].name != NULL; i++) 404 seq_printf(seq, " %lu", 405 snmp_fold_field((void **)net->mib.net_statistics, 406 snmp4_net_list[i].entry)); 407 408 seq_puts(seq, "\nIpExt:"); 409 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++) 410 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); 411 412 seq_puts(seq, "\nIpExt:"); 413 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++) 414 seq_printf(seq, " %lu", 415 snmp_fold_field((void **)net->mib.ip_statistics, 416 snmp4_ipextstats_list[i].entry)); 417 418 seq_putc(seq, '\n'); 419 return 0; 420 } 421 422 static int netstat_seq_open(struct inode *inode, struct file *file) 423 { 424 return single_open_net(inode, file, netstat_seq_show); 425 } 426 427 static const struct file_operations netstat_seq_fops = { 428 .owner = THIS_MODULE, 429 .open = netstat_seq_open, 430 .read = seq_read, 431 .llseek = seq_lseek, 432 .release = single_release_net, 433 }; 434 435 static __net_init int ip_proc_init_net(struct net *net) 436 { 437 if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops)) 438 goto out_sockstat; 439 if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops)) 440 goto out_netstat; 441 if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops)) 442 goto out_snmp; 443 444 return 0; 445 446 out_snmp: 447 proc_net_remove(net, "netstat"); 448 out_netstat: 449 proc_net_remove(net, "sockstat"); 450 out_sockstat: 451 return -ENOMEM; 452 } 453 454 static __net_exit void ip_proc_exit_net(struct net *net) 455 { 456 proc_net_remove(net, "snmp"); 457 proc_net_remove(net, "netstat"); 458 proc_net_remove(net, "sockstat"); 459 } 460 461 static __net_initdata struct pernet_operations ip_proc_ops = { 462 .init = ip_proc_init_net, 463 .exit = ip_proc_exit_net, 464 }; 465 466 int __init ip_misc_proc_init(void) 467 { 468 return register_pernet_subsys(&ip_proc_ops); 469 } 470 471