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 * Version: $Id: proc.c,v 1.45 2001/05/16 16:45:35 davem Exp $ 11 * 12 * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 13 * Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de> 14 * Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de> 15 * Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de> 16 * 17 * Fixes: 18 * Alan Cox : UDP sockets show the rxqueue/txqueue 19 * using hint flag for the netinfo. 20 * Pauline Middelink : identd support 21 * Alan Cox : Make /proc safer. 22 * Erik Schoenfelder : /proc/net/snmp 23 * Alan Cox : Handle dead sockets properly. 24 * Gerhard Koerting : Show both timers 25 * Alan Cox : Allow inode to be NULL (kernel socket) 26 * Andi Kleen : Add support for open_requests and 27 * split functions for more readibility. 28 * Andi Kleen : Add support for /proc/net/netstat 29 * Arnaldo C. Melo : Convert to seq_file 30 * 31 * This program is free software; you can redistribute it and/or 32 * modify it under the terms of the GNU General Public License 33 * as published by the Free Software Foundation; either version 34 * 2 of the License, or (at your option) any later version. 35 */ 36 #include <linux/types.h> 37 #include <net/net_namespace.h> 38 #include <net/icmp.h> 39 #include <net/protocol.h> 40 #include <net/tcp.h> 41 #include <net/udp.h> 42 #include <net/udplite.h> 43 #include <linux/inetdevice.h> 44 #include <linux/proc_fs.h> 45 #include <linux/seq_file.h> 46 #include <net/sock.h> 47 #include <net/raw.h> 48 49 static int fold_prot_inuse(struct proto *proto) 50 { 51 int res = 0; 52 int cpu; 53 54 for_each_possible_cpu(cpu) 55 res += proto->stats[cpu].inuse; 56 57 return res; 58 } 59 60 /* 61 * Report socket allocation statistics [mea@utu.fi] 62 */ 63 static int sockstat_seq_show(struct seq_file *seq, void *v) 64 { 65 socket_seq_show(seq); 66 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n", 67 fold_prot_inuse(&tcp_prot), atomic_read(&tcp_orphan_count), 68 tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated), 69 atomic_read(&tcp_memory_allocated)); 70 seq_printf(seq, "UDP: inuse %d\n", fold_prot_inuse(&udp_prot)); 71 seq_printf(seq, "UDPLITE: inuse %d\n", fold_prot_inuse(&udplite_prot)); 72 seq_printf(seq, "RAW: inuse %d\n", fold_prot_inuse(&raw_prot)); 73 seq_printf(seq, "FRAG: inuse %d memory %d\n", 74 ip_frag_nqueues(), ip_frag_mem()); 75 return 0; 76 } 77 78 static int sockstat_seq_open(struct inode *inode, struct file *file) 79 { 80 return single_open(file, sockstat_seq_show, NULL); 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, 89 }; 90 91 /* snmp items */ 92 static const struct snmp_mib snmp4_ipstats_list[] = { 93 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES), 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_OUTREQUESTS), 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_SENTINEL 122 }; 123 124 static const struct snmp_mib snmp4_icmp_list[] = { 125 SNMP_MIB_ITEM("InMsgs", ICMP_MIB_INMSGS), 126 SNMP_MIB_ITEM("InErrors", ICMP_MIB_INERRORS), 127 SNMP_MIB_ITEM("OutMsgs", ICMP_MIB_OUTMSGS), 128 SNMP_MIB_ITEM("OutErrors", ICMP_MIB_OUTERRORS), 129 SNMP_MIB_SENTINEL 130 }; 131 132 static struct { 133 char *name; 134 int index; 135 } icmpmibmap[] = { 136 { "DestUnreachs", ICMP_DEST_UNREACH }, 137 { "TimeExcds", ICMP_TIME_EXCEEDED }, 138 { "ParmProbs", ICMP_PARAMETERPROB }, 139 { "SrcQuenchs", ICMP_SOURCE_QUENCH }, 140 { "Redirects", ICMP_REDIRECT }, 141 { "Echos", ICMP_ECHO }, 142 { "EchoReps", ICMP_ECHOREPLY }, 143 { "Timestamps", ICMP_TIMESTAMP }, 144 { "TimestampReps", ICMP_TIMESTAMPREPLY }, 145 { "AddrMasks", ICMP_ADDRESS }, 146 { "AddrMaskReps", ICMP_ADDRESSREPLY }, 147 { NULL, 0 } 148 }; 149 150 151 static const struct snmp_mib snmp4_tcp_list[] = { 152 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM), 153 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN), 154 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX), 155 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN), 156 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS), 157 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS), 158 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS), 159 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS), 160 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB), 161 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS), 162 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS), 163 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS), 164 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS), 165 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS), 166 SNMP_MIB_SENTINEL 167 }; 168 169 static const struct snmp_mib snmp4_udp_list[] = { 170 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS), 171 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS), 172 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS), 173 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS), 174 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS), 175 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS), 176 SNMP_MIB_SENTINEL 177 }; 178 179 static const struct snmp_mib snmp4_net_list[] = { 180 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), 181 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), 182 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), 183 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), 184 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), 185 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), 186 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), 187 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), 188 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), 189 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), 190 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), 191 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), 192 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), 193 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED), 194 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), 195 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), 196 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), 197 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), 198 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), 199 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), 200 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), 201 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED), 202 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG), 203 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE), 204 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED), 205 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), 206 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER), 207 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), 208 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), 209 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), 210 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), 211 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), 212 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER), 213 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), 214 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), 215 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), 216 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), 217 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), 218 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), 219 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), 220 SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS), 221 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), 222 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), 223 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), 224 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), 225 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), 226 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS), 227 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), 228 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), 229 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), 230 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), 231 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED), 232 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), 233 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 234 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 235 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 236 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 237 SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN), 238 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), 239 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), 240 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), 241 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), 242 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), 243 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), 244 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), 245 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), 246 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), 247 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), 248 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), 249 SNMP_MIB_SENTINEL 250 }; 251 252 static void icmpmsg_put(struct seq_file *seq) 253 { 254 #define PERLINE 16 255 256 int j, i, count; 257 static int out[PERLINE]; 258 259 count = 0; 260 for (i = 0; i < ICMPMSG_MIB_MAX; i++) { 261 262 if (snmp_fold_field((void **) icmpmsg_statistics, i)) 263 out[count++] = i; 264 if (count < PERLINE) 265 continue; 266 267 seq_printf(seq, "\nIcmpMsg:"); 268 for (j = 0; j < PERLINE; ++j) 269 seq_printf(seq, " %sType%u", i & 0x100 ? "Out" : "In", 270 i & 0xff); 271 seq_printf(seq, "\nIcmpMsg: "); 272 for (j = 0; j < PERLINE; ++j) 273 seq_printf(seq, " %lu", 274 snmp_fold_field((void **) icmpmsg_statistics, 275 out[j])); 276 seq_putc(seq, '\n'); 277 } 278 if (count) { 279 seq_printf(seq, "\nIcmpMsg:"); 280 for (j = 0; j < count; ++j) 281 seq_printf(seq, " %sType%u", out[j] & 0x100 ? "Out" : 282 "In", out[j] & 0xff); 283 seq_printf(seq, "\nIcmpMsg:"); 284 for (j = 0; j < count; ++j) 285 seq_printf(seq, " %lu", snmp_fold_field((void **) 286 icmpmsg_statistics, out[j])); 287 } 288 289 #undef PERLINE 290 } 291 292 static void icmp_put(struct seq_file *seq) 293 { 294 int i; 295 296 seq_puts(seq, "\nIcmp: InMsgs InErrors"); 297 for (i=0; icmpmibmap[i].name != NULL; i++) 298 seq_printf(seq, " In%s", icmpmibmap[i].name); 299 seq_printf(seq, " OutMsgs OutErrors"); 300 for (i=0; icmpmibmap[i].name != NULL; i++) 301 seq_printf(seq, " Out%s", icmpmibmap[i].name); 302 seq_printf(seq, "\nIcmp: %lu %lu", 303 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INMSGS), 304 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INERRORS)); 305 for (i=0; icmpmibmap[i].name != NULL; i++) 306 seq_printf(seq, " %lu", 307 snmp_fold_field((void **) icmpmsg_statistics, 308 icmpmibmap[i].index)); 309 seq_printf(seq, " %lu %lu", 310 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTMSGS), 311 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTERRORS)); 312 for (i=0; icmpmibmap[i].name != NULL; i++) 313 seq_printf(seq, " %lu", 314 snmp_fold_field((void **) icmpmsg_statistics, 315 icmpmibmap[i].index)); 316 } 317 318 /* 319 * Called from the PROCfs module. This outputs /proc/net/snmp. 320 */ 321 static int snmp_seq_show(struct seq_file *seq, void *v) 322 { 323 int i; 324 325 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 326 327 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) 328 seq_printf(seq, " %s", snmp4_ipstats_list[i].name); 329 330 seq_printf(seq, "\nIp: %d %d", 331 IPV4_DEVCONF_ALL(FORWARDING) ? 1 : 2, sysctl_ip_default_ttl); 332 333 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) 334 seq_printf(seq, " %lu", 335 snmp_fold_field((void **)ip_statistics, 336 snmp4_ipstats_list[i].entry)); 337 338 icmp_put(seq); /* RFC 2011 compatibility */ 339 icmpmsg_put(seq); 340 341 seq_puts(seq, "\nTcp:"); 342 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) 343 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 344 345 seq_puts(seq, "\nTcp:"); 346 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) { 347 /* MaxConn field is signed, RFC 2012 */ 348 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 349 seq_printf(seq, " %ld", 350 snmp_fold_field((void **)tcp_statistics, 351 snmp4_tcp_list[i].entry)); 352 else 353 seq_printf(seq, " %lu", 354 snmp_fold_field((void **)tcp_statistics, 355 snmp4_tcp_list[i].entry)); 356 } 357 358 seq_puts(seq, "\nUdp:"); 359 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 360 seq_printf(seq, " %s", snmp4_udp_list[i].name); 361 362 seq_puts(seq, "\nUdp:"); 363 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 364 seq_printf(seq, " %lu", 365 snmp_fold_field((void **)udp_statistics, 366 snmp4_udp_list[i].entry)); 367 368 /* the UDP and UDP-Lite MIBs are the same */ 369 seq_puts(seq, "\nUdpLite:"); 370 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 371 seq_printf(seq, " %s", snmp4_udp_list[i].name); 372 373 seq_puts(seq, "\nUdpLite:"); 374 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 375 seq_printf(seq, " %lu", 376 snmp_fold_field((void **)udplite_statistics, 377 snmp4_udp_list[i].entry)); 378 379 seq_putc(seq, '\n'); 380 return 0; 381 } 382 383 static int snmp_seq_open(struct inode *inode, struct file *file) 384 { 385 return single_open(file, snmp_seq_show, NULL); 386 } 387 388 static const struct file_operations snmp_seq_fops = { 389 .owner = THIS_MODULE, 390 .open = snmp_seq_open, 391 .read = seq_read, 392 .llseek = seq_lseek, 393 .release = single_release, 394 }; 395 396 397 398 /* 399 * Output /proc/net/netstat 400 */ 401 static int netstat_seq_show(struct seq_file *seq, void *v) 402 { 403 int i; 404 405 seq_puts(seq, "TcpExt:"); 406 for (i = 0; snmp4_net_list[i].name != NULL; i++) 407 seq_printf(seq, " %s", snmp4_net_list[i].name); 408 409 seq_puts(seq, "\nTcpExt:"); 410 for (i = 0; snmp4_net_list[i].name != NULL; i++) 411 seq_printf(seq, " %lu", 412 snmp_fold_field((void **)net_statistics, 413 snmp4_net_list[i].entry)); 414 415 seq_puts(seq, "\nIpExt:"); 416 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++) 417 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); 418 419 seq_puts(seq, "\nIpExt:"); 420 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++) 421 seq_printf(seq, " %lu", 422 snmp_fold_field((void **)ip_statistics, 423 snmp4_ipextstats_list[i].entry)); 424 425 seq_putc(seq, '\n'); 426 return 0; 427 } 428 429 static int netstat_seq_open(struct inode *inode, struct file *file) 430 { 431 return single_open(file, netstat_seq_show, NULL); 432 } 433 434 static const struct file_operations netstat_seq_fops = { 435 .owner = THIS_MODULE, 436 .open = netstat_seq_open, 437 .read = seq_read, 438 .llseek = seq_lseek, 439 .release = single_release, 440 }; 441 442 int __init ip_misc_proc_init(void) 443 { 444 int rc = 0; 445 446 if (!proc_net_fops_create(&init_net, "netstat", S_IRUGO, &netstat_seq_fops)) 447 goto out_netstat; 448 449 if (!proc_net_fops_create(&init_net, "snmp", S_IRUGO, &snmp_seq_fops)) 450 goto out_snmp; 451 452 if (!proc_net_fops_create(&init_net, "sockstat", S_IRUGO, &sockstat_seq_fops)) 453 goto out_sockstat; 454 out: 455 return rc; 456 out_sockstat: 457 proc_net_remove(&init_net, "snmp"); 458 out_snmp: 459 proc_net_remove(&init_net, "netstat"); 460 out_netstat: 461 rc = -ENOMEM; 462 goto out; 463 } 464 465