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