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_INPKTS), 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_OUTPKTS), 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_ITEM("InOctets", IPSTATS_MIB_INOCTETS), 122 SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS), 123 SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS), 124 SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS), 125 SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS), 126 SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS), 127 SNMP_MIB_SENTINEL 128 }; 129 130 static struct { 131 char *name; 132 int index; 133 } icmpmibmap[] = { 134 { "DestUnreachs", ICMP_DEST_UNREACH }, 135 { "TimeExcds", ICMP_TIME_EXCEEDED }, 136 { "ParmProbs", ICMP_PARAMETERPROB }, 137 { "SrcQuenchs", ICMP_SOURCE_QUENCH }, 138 { "Redirects", ICMP_REDIRECT }, 139 { "Echos", ICMP_ECHO }, 140 { "EchoReps", ICMP_ECHOREPLY }, 141 { "Timestamps", ICMP_TIMESTAMP }, 142 { "TimestampReps", ICMP_TIMESTAMPREPLY }, 143 { "AddrMasks", ICMP_ADDRESS }, 144 { "AddrMaskReps", ICMP_ADDRESSREPLY }, 145 { NULL, 0 } 146 }; 147 148 149 static const struct snmp_mib snmp4_tcp_list[] = { 150 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM), 151 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN), 152 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX), 153 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN), 154 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS), 155 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS), 156 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS), 157 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS), 158 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB), 159 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS), 160 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS), 161 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS), 162 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS), 163 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS), 164 SNMP_MIB_SENTINEL 165 }; 166 167 static const struct snmp_mib snmp4_udp_list[] = { 168 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS), 169 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS), 170 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS), 171 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS), 172 SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS), 173 SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS), 174 SNMP_MIB_SENTINEL 175 }; 176 177 static const struct snmp_mib snmp4_net_list[] = { 178 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), 179 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), 180 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), 181 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), 182 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), 183 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), 184 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), 185 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), 186 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), 187 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), 188 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), 189 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), 190 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), 191 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED), 192 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), 193 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), 194 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), 195 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), 196 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), 197 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), 198 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), 199 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED), 200 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG), 201 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE), 202 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED), 203 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), 204 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER), 205 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), 206 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), 207 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), 208 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), 209 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), 210 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER), 211 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), 212 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), 213 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), 214 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), 215 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), 216 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), 217 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), 218 SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS), 219 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), 220 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), 221 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), 222 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), 223 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), 224 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS), 225 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), 226 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), 227 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), 228 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), 229 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED), 230 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), 231 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 232 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 233 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 234 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 235 SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN), 236 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), 237 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), 238 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), 239 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), 240 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), 241 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), 242 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), 243 SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD), 244 SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD), 245 SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO), 246 SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS), 247 SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND), 248 SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED), 249 SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED), 250 SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED), 251 SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK), 252 SNMP_MIB_SENTINEL 253 }; 254 255 static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals, 256 unsigned short *type, int count) 257 { 258 int j; 259 260 if (count) { 261 seq_printf(seq, "\nIcmpMsg:"); 262 for (j = 0; j < count; ++j) 263 seq_printf(seq, " %sType%u", 264 type[j] & 0x100 ? "Out" : "In", 265 type[j] & 0xff); 266 seq_printf(seq, "\nIcmpMsg:"); 267 for (j = 0; j < count; ++j) 268 seq_printf(seq, " %lu", vals[j]); 269 } 270 } 271 272 static void icmpmsg_put(struct seq_file *seq) 273 { 274 #define PERLINE 16 275 276 int i, count; 277 unsigned short type[PERLINE]; 278 unsigned long vals[PERLINE], val; 279 struct net *net = seq->private; 280 281 count = 0; 282 for (i = 0; i < ICMPMSG_MIB_MAX; i++) { 283 val = snmp_fold_field((void **) net->mib.icmpmsg_statistics, i); 284 if (val) { 285 type[count] = i; 286 vals[count++] = val; 287 } 288 if (count == PERLINE) { 289 icmpmsg_put_line(seq, vals, type, count); 290 count = 0; 291 } 292 } 293 icmpmsg_put_line(seq, vals, type, count); 294 295 #undef PERLINE 296 } 297 298 static void icmp_put(struct seq_file *seq) 299 { 300 int i; 301 struct net *net = seq->private; 302 303 seq_puts(seq, "\nIcmp: InMsgs InErrors"); 304 for (i=0; icmpmibmap[i].name != NULL; i++) 305 seq_printf(seq, " In%s", icmpmibmap[i].name); 306 seq_printf(seq, " OutMsgs OutErrors"); 307 for (i=0; icmpmibmap[i].name != NULL; i++) 308 seq_printf(seq, " Out%s", icmpmibmap[i].name); 309 seq_printf(seq, "\nIcmp: %lu %lu", 310 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INMSGS), 311 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INERRORS)); 312 for (i=0; icmpmibmap[i].name != NULL; i++) 313 seq_printf(seq, " %lu", 314 snmp_fold_field((void **) net->mib.icmpmsg_statistics, 315 icmpmibmap[i].index)); 316 seq_printf(seq, " %lu %lu", 317 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS), 318 snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS)); 319 for (i=0; icmpmibmap[i].name != NULL; i++) 320 seq_printf(seq, " %lu", 321 snmp_fold_field((void **) net->mib.icmpmsg_statistics, 322 icmpmibmap[i].index | 0x100)); 323 } 324 325 /* 326 * Called from the PROCfs module. This outputs /proc/net/snmp. 327 */ 328 static int snmp_seq_show(struct seq_file *seq, void *v) 329 { 330 int i; 331 struct net *net = seq->private; 332 333 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 334 335 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) 336 seq_printf(seq, " %s", snmp4_ipstats_list[i].name); 337 338 seq_printf(seq, "\nIp: %d %d", 339 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2, 340 sysctl_ip_default_ttl); 341 342 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) 343 seq_printf(seq, " %lu", 344 snmp_fold_field((void **)net->mib.ip_statistics, 345 snmp4_ipstats_list[i].entry)); 346 347 icmp_put(seq); /* RFC 2011 compatibility */ 348 icmpmsg_put(seq); 349 350 seq_puts(seq, "\nTcp:"); 351 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) 352 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 353 354 seq_puts(seq, "\nTcp:"); 355 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) { 356 /* MaxConn field is signed, RFC 2012 */ 357 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 358 seq_printf(seq, " %ld", 359 snmp_fold_field((void **)net->mib.tcp_statistics, 360 snmp4_tcp_list[i].entry)); 361 else 362 seq_printf(seq, " %lu", 363 snmp_fold_field((void **)net->mib.tcp_statistics, 364 snmp4_tcp_list[i].entry)); 365 } 366 367 seq_puts(seq, "\nUdp:"); 368 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 369 seq_printf(seq, " %s", snmp4_udp_list[i].name); 370 371 seq_puts(seq, "\nUdp:"); 372 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 373 seq_printf(seq, " %lu", 374 snmp_fold_field((void **)net->mib.udp_statistics, 375 snmp4_udp_list[i].entry)); 376 377 /* the UDP and UDP-Lite MIBs are the same */ 378 seq_puts(seq, "\nUdpLite:"); 379 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 380 seq_printf(seq, " %s", snmp4_udp_list[i].name); 381 382 seq_puts(seq, "\nUdpLite:"); 383 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 384 seq_printf(seq, " %lu", 385 snmp_fold_field((void **)net->mib.udplite_statistics, 386 snmp4_udp_list[i].entry)); 387 388 seq_putc(seq, '\n'); 389 return 0; 390 } 391 392 static int snmp_seq_open(struct inode *inode, struct file *file) 393 { 394 return single_open_net(inode, file, snmp_seq_show); 395 } 396 397 static const struct file_operations snmp_seq_fops = { 398 .owner = THIS_MODULE, 399 .open = snmp_seq_open, 400 .read = seq_read, 401 .llseek = seq_lseek, 402 .release = single_release_net, 403 }; 404 405 406 407 /* 408 * Output /proc/net/netstat 409 */ 410 static int netstat_seq_show(struct seq_file *seq, void *v) 411 { 412 int i; 413 struct net *net = seq->private; 414 415 seq_puts(seq, "TcpExt:"); 416 for (i = 0; snmp4_net_list[i].name != NULL; i++) 417 seq_printf(seq, " %s", snmp4_net_list[i].name); 418 419 seq_puts(seq, "\nTcpExt:"); 420 for (i = 0; snmp4_net_list[i].name != NULL; i++) 421 seq_printf(seq, " %lu", 422 snmp_fold_field((void **)net->mib.net_statistics, 423 snmp4_net_list[i].entry)); 424 425 seq_puts(seq, "\nIpExt:"); 426 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++) 427 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); 428 429 seq_puts(seq, "\nIpExt:"); 430 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++) 431 seq_printf(seq, " %lu", 432 snmp_fold_field((void **)net->mib.ip_statistics, 433 snmp4_ipextstats_list[i].entry)); 434 435 seq_putc(seq, '\n'); 436 return 0; 437 } 438 439 static int netstat_seq_open(struct inode *inode, struct file *file) 440 { 441 return single_open_net(inode, file, netstat_seq_show); 442 } 443 444 static const struct file_operations netstat_seq_fops = { 445 .owner = THIS_MODULE, 446 .open = netstat_seq_open, 447 .read = seq_read, 448 .llseek = seq_lseek, 449 .release = single_release_net, 450 }; 451 452 static __net_init int ip_proc_init_net(struct net *net) 453 { 454 if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops)) 455 goto out_sockstat; 456 if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops)) 457 goto out_netstat; 458 if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops)) 459 goto out_snmp; 460 461 return 0; 462 463 out_snmp: 464 proc_net_remove(net, "netstat"); 465 out_netstat: 466 proc_net_remove(net, "sockstat"); 467 out_sockstat: 468 return -ENOMEM; 469 } 470 471 static __net_exit void ip_proc_exit_net(struct net *net) 472 { 473 proc_net_remove(net, "snmp"); 474 proc_net_remove(net, "netstat"); 475 proc_net_remove(net, "sockstat"); 476 } 477 478 static __net_initdata struct pernet_operations ip_proc_ops = { 479 .init = ip_proc_init_net, 480 .exit = ip_proc_exit_net, 481 }; 482 483 int __init ip_misc_proc_init(void) 484 { 485 return register_pernet_subsys(&ip_proc_ops); 486 } 487 488