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 %d\n", 63 sock_prot_inuse_get(net, &tcp_prot), orphans, 64 tcp_death_row.tw_count, sockets, 65 atomic_read(&tcp_memory_allocated)); 66 seq_printf(seq, "UDP: inuse %d mem %d\n", 67 sock_prot_inuse_get(net, &udp_prot), 68 atomic_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_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 struct { 125 char *name; 126 int index; 127 } icmpmibmap[] = { 128 { "DestUnreachs", ICMP_DEST_UNREACH }, 129 { "TimeExcds", ICMP_TIME_EXCEEDED }, 130 { "ParmProbs", ICMP_PARAMETERPROB }, 131 { "SrcQuenchs", ICMP_SOURCE_QUENCH }, 132 { "Redirects", ICMP_REDIRECT }, 133 { "Echos", ICMP_ECHO }, 134 { "EchoReps", ICMP_ECHOREPLY }, 135 { "Timestamps", ICMP_TIMESTAMP }, 136 { "TimestampReps", ICMP_TIMESTAMPREPLY }, 137 { "AddrMasks", ICMP_ADDRESS }, 138 { "AddrMaskReps", ICMP_ADDRESSREPLY }, 139 { NULL, 0 } 140 }; 141 142 143 static const struct snmp_mib snmp4_tcp_list[] = { 144 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM), 145 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN), 146 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX), 147 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN), 148 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS), 149 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS), 150 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS), 151 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS), 152 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB), 153 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS), 154 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS), 155 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS), 156 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS), 157 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS), 158 SNMP_MIB_SENTINEL 159 }; 160 161 static const struct snmp_mib snmp4_udp_list[] = { 162 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS), 163 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS), 164 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS), 165 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS), 166 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS), 167 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS), 168 SNMP_MIB_SENTINEL 169 }; 170 171 static const struct snmp_mib snmp4_net_list[] = { 172 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), 173 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), 174 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), 175 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), 176 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), 177 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), 178 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), 179 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), 180 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), 181 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), 182 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), 183 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), 184 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), 185 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED), 186 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), 187 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), 188 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), 189 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), 190 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), 191 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), 192 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), 193 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED), 194 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG), 195 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE), 196 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED), 197 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), 198 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER), 199 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), 200 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), 201 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), 202 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), 203 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), 204 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER), 205 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), 206 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), 207 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), 208 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), 209 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), 210 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), 211 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), 212 SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS), 213 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), 214 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), 215 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), 216 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), 217 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), 218 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS), 219 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), 220 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), 221 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), 222 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), 223 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED), 224 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), 225 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 226 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 227 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 228 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 229 SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN), 230 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), 231 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), 232 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), 233 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), 234 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), 235 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), 236 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), 237 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), 238 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), 239 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), 240 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), 241 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND), 242 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED), 243 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED), 244 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED), 245 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK), 246 SNMP_MIB_SENTINEL 247 }; 248 249 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals, 250 unsigned short *type, int count) 251 { 252 int j; 253 254 if (count) { 255 seq_printf(seq, "\nIcmpMsg:"); 256 for (j = 0; j < count; ++j) 257 seq_printf(seq, " %sType%u", 258 type[j] & 0x100 ? "Out" : "In", 259 type[j] & 0xff); 260 seq_printf(seq, "\nIcmpMsg:"); 261 for (j = 0; j < count; ++j) 262 seq_printf(seq, " %lu", vals[j]); 263 } 264 } 265 266 static void icmpmsg_put(struct seq_file *seq) 267 { 268 #define PERLINE 16 269 270 int i, count; 271 unsigned short type[PERLINE]; 272 unsigned long vals[PERLINE], val; 273 struct net *net = seq->private; 274 275 count = 0; 276 for (i = 0; i < ICMPMSG_MIB_MAX; i++) { 277 val = snmp_fold_field((void **) net->mib.icmpmsg_statistics, i); 278 if (val) { 279 type[count] = i; 280 vals[count++] = val; 281 } 282 if (count == PERLINE) { 283 icmpmsg_put_line(seq, vals, type, count); 284 count = 0; 285 } 286 } 287 icmpmsg_put_line(seq, vals, type, count); 288 289 #undef PERLINE 290 } 291 292 static void icmp_put(struct seq_file *seq) 293 { 294 int i; 295 struct net *net = seq->private; 296 297 seq_puts(seq, "\nIcmp: InMsgs InErrors"); 298 for (i=0; icmpmibmap[i].name != NULL; i++) 299 seq_printf(seq, " In%s", icmpmibmap[i].name); 300 seq_printf(seq, " OutMsgs OutErrors"); 301 for (i=0; icmpmibmap[i].name != NULL; i++) 302 seq_printf(seq, " Out%s", icmpmibmap[i].name); 303 seq_printf(seq, "\nIcmp: %lu %lu", 304 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INMSGS), 305 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INERRORS)); 306 for (i=0; icmpmibmap[i].name != NULL; i++) 307 seq_printf(seq, " %lu", 308 snmp_fold_field((void **) net->mib.icmpmsg_statistics, 309 icmpmibmap[i].index)); 310 seq_printf(seq, " %lu %lu", 311 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS), 312 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS)); 313 for (i=0; icmpmibmap[i].name != NULL; i++) 314 seq_printf(seq, " %lu", 315 snmp_fold_field((void **) net->mib.icmpmsg_statistics, 316 icmpmibmap[i].index | 0x100)); 317 } 318 319 /* 320 * Called from the PROCfs module. This outputs /proc/net/snmp. 321 */ 322 static int snmp_seq_show(struct seq_file *seq, void *v) 323 { 324 int i; 325 struct net *net = seq->private; 326 327 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 328 329 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) 330 seq_printf(seq, " %s", snmp4_ipstats_list[i].name); 331 332 seq_printf(seq, "\nIp: %d %d", 333 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2, 334 sysctl_ip_default_ttl); 335 336 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) 337 seq_printf(seq, " %lu", 338 snmp_fold_field((void **)net->mib.ip_statistics, 339 snmp4_ipstats_list[i].entry)); 340 341 icmp_put(seq); /* RFC 2011 compatibility */ 342 icmpmsg_put(seq); 343 344 seq_puts(seq, "\nTcp:"); 345 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) 346 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 347 348 seq_puts(seq, "\nTcp:"); 349 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) { 350 /* MaxConn field is signed, RFC 2012 */ 351 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 352 seq_printf(seq, " %ld", 353 snmp_fold_field((void **)net->mib.tcp_statistics, 354 snmp4_tcp_list[i].entry)); 355 else 356 seq_printf(seq, " %lu", 357 snmp_fold_field((void **)net->mib.tcp_statistics, 358 snmp4_tcp_list[i].entry)); 359 } 360 361 seq_puts(seq, "\nUdp:"); 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, "\nUdp:"); 366 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 367 seq_printf(seq, " %lu", 368 snmp_fold_field((void **)net->mib.udp_statistics, 369 snmp4_udp_list[i].entry)); 370 371 /* the UDP and UDP-Lite MIBs are the same */ 372 seq_puts(seq, "\nUdpLite:"); 373 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 374 seq_printf(seq, " %s", snmp4_udp_list[i].name); 375 376 seq_puts(seq, "\nUdpLite:"); 377 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 378 seq_printf(seq, " %lu", 379 snmp_fold_field((void **)net->mib.udplite_statistics, 380 snmp4_udp_list[i].entry)); 381 382 seq_putc(seq, '\n'); 383 return 0; 384 } 385 386 static int snmp_seq_open(struct inode *inode, struct file *file) 387 { 388 return single_open_net(inode, file, snmp_seq_show); 389 } 390 391 static const struct file_operations snmp_seq_fops = { 392 .owner = THIS_MODULE, 393 .open = snmp_seq_open, 394 .read = seq_read, 395 .llseek = seq_lseek, 396 .release = single_release_net, 397 }; 398 399 400 401 /* 402 * Output /proc/net/netstat 403 */ 404 static int netstat_seq_show(struct seq_file *seq, void *v) 405 { 406 int i; 407 struct net *net = seq->private; 408 409 seq_puts(seq, "TcpExt:"); 410 for (i = 0; snmp4_net_list[i].name != NULL; i++) 411 seq_printf(seq, " %s", snmp4_net_list[i].name); 412 413 seq_puts(seq, "\nTcpExt:"); 414 for (i = 0; snmp4_net_list[i].name != NULL; i++) 415 seq_printf(seq, " %lu", 416 snmp_fold_field((void **)net->mib.net_statistics, 417 snmp4_net_list[i].entry)); 418 419 seq_puts(seq, "\nIpExt:"); 420 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++) 421 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); 422 423 seq_puts(seq, "\nIpExt:"); 424 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++) 425 seq_printf(seq, " %lu", 426 snmp_fold_field((void **)net->mib.ip_statistics, 427 snmp4_ipextstats_list[i].entry)); 428 429 seq_putc(seq, '\n'); 430 return 0; 431 } 432 433 static int netstat_seq_open(struct inode *inode, struct file *file) 434 { 435 return single_open_net(inode, file, netstat_seq_show); 436 } 437 438 static const struct file_operations netstat_seq_fops = { 439 .owner = THIS_MODULE, 440 .open = netstat_seq_open, 441 .read = seq_read, 442 .llseek = seq_lseek, 443 .release = single_release_net, 444 }; 445 446 static __net_init int ip_proc_init_net(struct net *net) 447 { 448 if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops)) 449 goto out_sockstat; 450 if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops)) 451 goto out_netstat; 452 if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops)) 453 goto out_snmp; 454 455 return 0; 456 457 out_snmp: 458 proc_net_remove(net, "netstat"); 459 out_netstat: 460 proc_net_remove(net, "sockstat"); 461 out_sockstat: 462 return -ENOMEM; 463 } 464 465 static __net_exit void ip_proc_exit_net(struct net *net) 466 { 467 proc_net_remove(net, "snmp"); 468 proc_net_remove(net, "netstat"); 469 proc_net_remove(net, "sockstat"); 470 } 471 472 static __net_initdata struct pernet_operations ip_proc_ops = { 473 .init = ip_proc_init_net, 474 .exit = ip_proc_exit_net, 475 }; 476 477 int __init ip_misc_proc_init(void) 478 { 479 return register_pernet_subsys(&ip_proc_ops); 480 } 481 482