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 /* 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 56 socket_seq_show(seq); 57 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n", 58 sock_prot_inuse_get(net, &tcp_prot), 59 atomic_read(&tcp_orphan_count), 60 tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated), 61 atomic_read(&tcp_memory_allocated)); 62 seq_printf(seq, "UDP: inuse %d mem %d\n", 63 sock_prot_inuse_get(net, &udp_prot), 64 atomic_read(&udp_memory_allocated)); 65 seq_printf(seq, "UDPLITE: inuse %d\n", 66 sock_prot_inuse_get(net, &udplite_prot)); 67 seq_printf(seq, "RAW: inuse %d\n", 68 sock_prot_inuse_get(net, &raw_prot)); 69 seq_printf(seq, "FRAG: inuse %d memory %d\n", 70 ip_frag_nqueues(net), ip_frag_mem(net)); 71 return 0; 72 } 73 74 static int sockstat_seq_open(struct inode *inode, struct file *file) 75 { 76 int err; 77 struct net *net; 78 79 err = -ENXIO; 80 net = get_proc_net(inode); 81 if (net == NULL) 82 goto err_net; 83 84 err = single_open(file, sockstat_seq_show, net); 85 if (err < 0) 86 goto err_open; 87 88 return 0; 89 90 err_open: 91 put_net(net); 92 err_net: 93 return err; 94 } 95 96 static int sockstat_seq_release(struct inode *inode, struct file *file) 97 { 98 struct net *net = ((struct seq_file *)file->private_data)->private; 99 100 put_net(net); 101 return single_release(inode, file); 102 } 103 104 static const struct file_operations sockstat_seq_fops = { 105 .owner = THIS_MODULE, 106 .open = sockstat_seq_open, 107 .read = seq_read, 108 .llseek = seq_lseek, 109 .release = sockstat_seq_release, 110 }; 111 112 /* snmp items */ 113 static const struct snmp_mib snmp4_ipstats_list[] = { 114 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES), 115 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS), 116 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS), 117 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 118 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 119 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS), 120 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS), 121 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS), 122 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS), 123 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 124 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 125 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS), 126 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS), 127 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS), 128 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS), 129 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS), 130 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES), 131 SNMP_MIB_SENTINEL 132 }; 133 134 /* Following RFC4293 items are displayed in /proc/net/netstat */ 135 static const struct snmp_mib snmp4_ipextstats_list[] = { 136 SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES), 137 SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 138 SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 139 SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 140 SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS), 141 SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS), 142 SNMP_MIB_SENTINEL 143 }; 144 145 static struct { 146 char *name; 147 int index; 148 } icmpmibmap[] = { 149 { "DestUnreachs", ICMP_DEST_UNREACH }, 150 { "TimeExcds", ICMP_TIME_EXCEEDED }, 151 { "ParmProbs", ICMP_PARAMETERPROB }, 152 { "SrcQuenchs", ICMP_SOURCE_QUENCH }, 153 { "Redirects", ICMP_REDIRECT }, 154 { "Echos", ICMP_ECHO }, 155 { "EchoReps", ICMP_ECHOREPLY }, 156 { "Timestamps", ICMP_TIMESTAMP }, 157 { "TimestampReps", ICMP_TIMESTAMPREPLY }, 158 { "AddrMasks", ICMP_ADDRESS }, 159 { "AddrMaskReps", ICMP_ADDRESSREPLY }, 160 { NULL, 0 } 161 }; 162 163 164 static const struct snmp_mib snmp4_tcp_list[] = { 165 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM), 166 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN), 167 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX), 168 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN), 169 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS), 170 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS), 171 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS), 172 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS), 173 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB), 174 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS), 175 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS), 176 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS), 177 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS), 178 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS), 179 SNMP_MIB_SENTINEL 180 }; 181 182 static const struct snmp_mib snmp4_udp_list[] = { 183 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS), 184 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS), 185 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS), 186 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS), 187 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS), 188 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS), 189 SNMP_MIB_SENTINEL 190 }; 191 192 static const struct snmp_mib snmp4_net_list[] = { 193 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), 194 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), 195 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), 196 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), 197 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), 198 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), 199 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), 200 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), 201 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), 202 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), 203 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), 204 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), 205 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), 206 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED), 207 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), 208 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), 209 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), 210 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), 211 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), 212 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), 213 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), 214 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED), 215 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG), 216 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE), 217 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED), 218 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), 219 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER), 220 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), 221 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), 222 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), 223 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), 224 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), 225 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER), 226 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), 227 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), 228 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), 229 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), 230 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), 231 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), 232 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), 233 SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS), 234 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), 235 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), 236 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), 237 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), 238 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), 239 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS), 240 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), 241 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), 242 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), 243 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), 244 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED), 245 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), 246 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 247 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 248 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 249 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 250 SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN), 251 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), 252 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), 253 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), 254 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), 255 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), 256 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), 257 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), 258 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), 259 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), 260 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), 261 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), 262 SNMP_MIB_SENTINEL 263 }; 264 265 static void icmpmsg_put(struct seq_file *seq) 266 { 267 #define PERLINE 16 268 269 int j, i, count; 270 static int out[PERLINE]; 271 272 count = 0; 273 for (i = 0; i < ICMPMSG_MIB_MAX; i++) { 274 275 if (snmp_fold_field((void **) icmpmsg_statistics, i)) 276 out[count++] = i; 277 if (count < PERLINE) 278 continue; 279 280 seq_printf(seq, "\nIcmpMsg:"); 281 for (j = 0; j < PERLINE; ++j) 282 seq_printf(seq, " %sType%u", i & 0x100 ? "Out" : "In", 283 i & 0xff); 284 seq_printf(seq, "\nIcmpMsg: "); 285 for (j = 0; j < PERLINE; ++j) 286 seq_printf(seq, " %lu", 287 snmp_fold_field((void **) icmpmsg_statistics, 288 out[j])); 289 seq_putc(seq, '\n'); 290 } 291 if (count) { 292 seq_printf(seq, "\nIcmpMsg:"); 293 for (j = 0; j < count; ++j) 294 seq_printf(seq, " %sType%u", out[j] & 0x100 ? "Out" : 295 "In", out[j] & 0xff); 296 seq_printf(seq, "\nIcmpMsg:"); 297 for (j = 0; j < count; ++j) 298 seq_printf(seq, " %lu", snmp_fold_field((void **) 299 icmpmsg_statistics, out[j])); 300 } 301 302 #undef PERLINE 303 } 304 305 static void icmp_put(struct seq_file *seq) 306 { 307 int i; 308 309 seq_puts(seq, "\nIcmp: InMsgs InErrors"); 310 for (i=0; icmpmibmap[i].name != NULL; i++) 311 seq_printf(seq, " In%s", icmpmibmap[i].name); 312 seq_printf(seq, " OutMsgs OutErrors"); 313 for (i=0; icmpmibmap[i].name != NULL; i++) 314 seq_printf(seq, " Out%s", icmpmibmap[i].name); 315 seq_printf(seq, "\nIcmp: %lu %lu", 316 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INMSGS), 317 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_INERRORS)); 318 for (i=0; icmpmibmap[i].name != NULL; i++) 319 seq_printf(seq, " %lu", 320 snmp_fold_field((void **) icmpmsg_statistics, 321 icmpmibmap[i].index)); 322 seq_printf(seq, " %lu %lu", 323 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTMSGS), 324 snmp_fold_field((void **) icmp_statistics, ICMP_MIB_OUTERRORS)); 325 for (i=0; icmpmibmap[i].name != NULL; i++) 326 seq_printf(seq, " %lu", 327 snmp_fold_field((void **) icmpmsg_statistics, 328 icmpmibmap[i].index | 0x100)); 329 } 330 331 /* 332 * Called from the PROCfs module. This outputs /proc/net/snmp. 333 */ 334 static int snmp_seq_show(struct seq_file *seq, void *v) 335 { 336 int i; 337 338 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 339 340 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) 341 seq_printf(seq, " %s", snmp4_ipstats_list[i].name); 342 343 seq_printf(seq, "\nIp: %d %d", 344 IPV4_DEVCONF_ALL(&init_net, FORWARDING) ? 1 : 2, 345 sysctl_ip_default_ttl); 346 347 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) 348 seq_printf(seq, " %lu", 349 snmp_fold_field((void **)ip_statistics, 350 snmp4_ipstats_list[i].entry)); 351 352 icmp_put(seq); /* RFC 2011 compatibility */ 353 icmpmsg_put(seq); 354 355 seq_puts(seq, "\nTcp:"); 356 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) 357 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 358 359 seq_puts(seq, "\nTcp:"); 360 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) { 361 /* MaxConn field is signed, RFC 2012 */ 362 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 363 seq_printf(seq, " %ld", 364 snmp_fold_field((void **)tcp_statistics, 365 snmp4_tcp_list[i].entry)); 366 else 367 seq_printf(seq, " %lu", 368 snmp_fold_field((void **)tcp_statistics, 369 snmp4_tcp_list[i].entry)); 370 } 371 372 seq_puts(seq, "\nUdp:"); 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, "\nUdp:"); 377 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 378 seq_printf(seq, " %lu", 379 snmp_fold_field((void **)udp_statistics, 380 snmp4_udp_list[i].entry)); 381 382 /* the UDP and UDP-Lite MIBs are the same */ 383 seq_puts(seq, "\nUdpLite:"); 384 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 385 seq_printf(seq, " %s", snmp4_udp_list[i].name); 386 387 seq_puts(seq, "\nUdpLite:"); 388 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 389 seq_printf(seq, " %lu", 390 snmp_fold_field((void **)udplite_statistics, 391 snmp4_udp_list[i].entry)); 392 393 seq_putc(seq, '\n'); 394 return 0; 395 } 396 397 static int snmp_seq_open(struct inode *inode, struct file *file) 398 { 399 return single_open(file, snmp_seq_show, NULL); 400 } 401 402 static const struct file_operations snmp_seq_fops = { 403 .owner = THIS_MODULE, 404 .open = snmp_seq_open, 405 .read = seq_read, 406 .llseek = seq_lseek, 407 .release = single_release, 408 }; 409 410 411 412 /* 413 * Output /proc/net/netstat 414 */ 415 static int netstat_seq_show(struct seq_file *seq, void *v) 416 { 417 int i; 418 419 seq_puts(seq, "TcpExt:"); 420 for (i = 0; snmp4_net_list[i].name != NULL; i++) 421 seq_printf(seq, " %s", snmp4_net_list[i].name); 422 423 seq_puts(seq, "\nTcpExt:"); 424 for (i = 0; snmp4_net_list[i].name != NULL; i++) 425 seq_printf(seq, " %lu", 426 snmp_fold_field((void **)net_statistics, 427 snmp4_net_list[i].entry)); 428 429 seq_puts(seq, "\nIpExt:"); 430 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++) 431 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); 432 433 seq_puts(seq, "\nIpExt:"); 434 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++) 435 seq_printf(seq, " %lu", 436 snmp_fold_field((void **)ip_statistics, 437 snmp4_ipextstats_list[i].entry)); 438 439 seq_putc(seq, '\n'); 440 return 0; 441 } 442 443 static int netstat_seq_open(struct inode *inode, struct file *file) 444 { 445 return single_open(file, netstat_seq_show, NULL); 446 } 447 448 static const struct file_operations netstat_seq_fops = { 449 .owner = THIS_MODULE, 450 .open = netstat_seq_open, 451 .read = seq_read, 452 .llseek = seq_lseek, 453 .release = single_release, 454 }; 455 456 static __net_init int ip_proc_init_net(struct net *net) 457 { 458 if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops)) 459 return -ENOMEM; 460 return 0; 461 } 462 463 static __net_exit void ip_proc_exit_net(struct net *net) 464 { 465 proc_net_remove(net, "sockstat"); 466 } 467 468 static __net_initdata struct pernet_operations ip_proc_ops = { 469 .init = ip_proc_init_net, 470 .exit = ip_proc_exit_net, 471 }; 472 473 int __init ip_misc_proc_init(void) 474 { 475 int rc = 0; 476 477 if (register_pernet_subsys(&ip_proc_ops)) 478 goto out_pernet; 479 480 if (!proc_net_fops_create(&init_net, "netstat", S_IRUGO, &netstat_seq_fops)) 481 goto out_netstat; 482 483 if (!proc_net_fops_create(&init_net, "snmp", S_IRUGO, &snmp_seq_fops)) 484 goto out_snmp; 485 out: 486 return rc; 487 out_snmp: 488 proc_net_remove(&init_net, "netstat"); 489 out_netstat: 490 unregister_pernet_subsys(&ip_proc_ops); 491 out_pernet: 492 rc = -ENOMEM; 493 goto out; 494 } 495 496