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