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 */ 51static 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 78static int sockstat_seq_open(struct inode *inode, struct file *file) 79{ 80 return single_open_net(inode, file, sockstat_seq_show); 81} 82 83static 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 */ 92static 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 */ 114static 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 130static const struct { 131 const 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 149static 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 167static 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 177static 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_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP), 253 SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP), 254 SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP), 255 SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER), 256 SNMP_MIB_SENTINEL 257}; 258 259static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals, 260 unsigned short *type, int count) 261{ 262 int j; 263 264 if (count) { 265 seq_printf(seq, "\nIcmpMsg:"); 266 for (j = 0; j < count; ++j) 267 seq_printf(seq, " %sType%u", 268 type[j] & 0x100 ? "Out" : "In", 269 type[j] & 0xff); 270 seq_printf(seq, "\nIcmpMsg:"); 271 for (j = 0; j < count; ++j) 272 seq_printf(seq, " %lu", vals[j]); 273 } 274} 275 276static void icmpmsg_put(struct seq_file *seq) 277{ 278#define PERLINE 16 279 280 int i, count; 281 unsigned short type[PERLINE]; 282 unsigned long vals[PERLINE], val; 283 struct net *net = seq->private; 284 285 count = 0; 286 for (i = 0; i < ICMPMSG_MIB_MAX; i++) { 287 val = snmp_fold_field((void __percpu **) net->mib.icmpmsg_statistics, i); 288 if (val) { 289 type[count] = i; 290 vals[count++] = val; 291 } 292 if (count == PERLINE) { 293 icmpmsg_put_line(seq, vals, type, count); 294 count = 0; 295 } 296 } 297 icmpmsg_put_line(seq, vals, type, count); 298 299#undef PERLINE 300} 301 302static void icmp_put(struct seq_file *seq) 303{ 304 int i; 305 struct net *net = seq->private; 306 307 seq_puts(seq, "\nIcmp: InMsgs InErrors"); 308 for (i=0; icmpmibmap[i].name != NULL; i++) 309 seq_printf(seq, " In%s", icmpmibmap[i].name); 310 seq_printf(seq, " OutMsgs OutErrors"); 311 for (i=0; icmpmibmap[i].name != NULL; i++) 312 seq_printf(seq, " Out%s", icmpmibmap[i].name); 313 seq_printf(seq, "\nIcmp: %lu %lu", 314 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INMSGS), 315 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INERRORS)); 316 for (i=0; icmpmibmap[i].name != NULL; i++) 317 seq_printf(seq, " %lu", 318 snmp_fold_field((void __percpu **) net->mib.icmpmsg_statistics, 319 icmpmibmap[i].index)); 320 seq_printf(seq, " %lu %lu", 321 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS), 322 snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS)); 323 for (i=0; icmpmibmap[i].name != NULL; i++) 324 seq_printf(seq, " %lu", 325 snmp_fold_field((void __percpu **) net->mib.icmpmsg_statistics, 326 icmpmibmap[i].index | 0x100)); 327} 328 329/* 330 * Called from the PROCfs module. This outputs /proc/net/snmp. 331 */ 332static int snmp_seq_show(struct seq_file *seq, void *v) 333{ 334 int i; 335 struct net *net = seq->private; 336 337 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 338 339 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) 340 seq_printf(seq, " %s", snmp4_ipstats_list[i].name); 341 342 seq_printf(seq, "\nIp: %d %d", 343 IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2, 344 sysctl_ip_default_ttl); 345 346 BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0); 347 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) 348 seq_printf(seq, " %llu", 349 snmp_fold_field64((void __percpu **)net->mib.ip_statistics, 350 snmp4_ipstats_list[i].entry, 351 offsetof(struct ipstats_mib, syncp))); 352 353 icmp_put(seq); /* RFC 2011 compatibility */ 354 icmpmsg_put(seq); 355 356 seq_puts(seq, "\nTcp:"); 357 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) 358 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 359 360 seq_puts(seq, "\nTcp:"); 361 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) { 362 /* MaxConn field is signed, RFC 2012 */ 363 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 364 seq_printf(seq, " %ld", 365 snmp_fold_field((void __percpu **)net->mib.tcp_statistics, 366 snmp4_tcp_list[i].entry)); 367 else 368 seq_printf(seq, " %lu", 369 snmp_fold_field((void __percpu **)net->mib.tcp_statistics, 370 snmp4_tcp_list[i].entry)); 371 } 372 373 seq_puts(seq, "\nUdp:"); 374 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 375 seq_printf(seq, " %s", snmp4_udp_list[i].name); 376 377 seq_puts(seq, "\nUdp:"); 378 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 379 seq_printf(seq, " %lu", 380 snmp_fold_field((void __percpu **)net->mib.udp_statistics, 381 snmp4_udp_list[i].entry)); 382 383 /* the UDP and UDP-Lite MIBs are the same */ 384 seq_puts(seq, "\nUdpLite:"); 385 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 386 seq_printf(seq, " %s", snmp4_udp_list[i].name); 387 388 seq_puts(seq, "\nUdpLite:"); 389 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 390 seq_printf(seq, " %lu", 391 snmp_fold_field((void __percpu **)net->mib.udplite_statistics, 392 snmp4_udp_list[i].entry)); 393 394 seq_putc(seq, '\n'); 395 return 0; 396} 397 398static int snmp_seq_open(struct inode *inode, struct file *file) 399{ 400 return single_open_net(inode, file, snmp_seq_show); 401} 402 403static const struct file_operations snmp_seq_fops = { 404 .owner = THIS_MODULE, 405 .open = snmp_seq_open, 406 .read = seq_read, 407 .llseek = seq_lseek, 408 .release = single_release_net, 409}; 410 411 412 413/* 414 * Output /proc/net/netstat 415 */ 416static int netstat_seq_show(struct seq_file *seq, void *v) 417{ 418 int i; 419 struct net *net = seq->private; 420 421 seq_puts(seq, "TcpExt:"); 422 for (i = 0; snmp4_net_list[i].name != NULL; i++) 423 seq_printf(seq, " %s", snmp4_net_list[i].name); 424 425 seq_puts(seq, "\nTcpExt:"); 426 for (i = 0; snmp4_net_list[i].name != NULL; i++) 427 seq_printf(seq, " %lu", 428 snmp_fold_field((void __percpu **)net->mib.net_statistics, 429 snmp4_net_list[i].entry)); 430 431 seq_puts(seq, "\nIpExt:"); 432 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++) 433 seq_printf(seq, " %s", snmp4_ipextstats_list[i].name); 434 435 seq_puts(seq, "\nIpExt:"); 436 for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++) 437 seq_printf(seq, " %llu", 438 snmp_fold_field64((void __percpu **)net->mib.ip_statistics, 439 snmp4_ipextstats_list[i].entry, 440 offsetof(struct ipstats_mib, syncp))); 441 442 seq_putc(seq, '\n'); 443 return 0; 444} 445 446static int netstat_seq_open(struct inode *inode, struct file *file) 447{ 448 return single_open_net(inode, file, netstat_seq_show); 449} 450 451static const struct file_operations netstat_seq_fops = { 452 .owner = THIS_MODULE, 453 .open = netstat_seq_open, 454 .read = seq_read, 455 .llseek = seq_lseek, 456 .release = single_release_net, 457}; 458 459static __net_init int ip_proc_init_net(struct net *net) 460{ 461 if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops)) 462 goto out_sockstat; 463 if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops)) 464 goto out_netstat; 465 if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops)) 466 goto out_snmp; 467 468 return 0; 469 470out_snmp: 471 proc_net_remove(net, "netstat"); 472out_netstat: 473 proc_net_remove(net, "sockstat"); 474out_sockstat: 475 return -ENOMEM; 476} 477 478static __net_exit void ip_proc_exit_net(struct net *net) 479{ 480 proc_net_remove(net, "snmp"); 481 proc_net_remove(net, "netstat"); 482 proc_net_remove(net, "sockstat"); 483} 484 485static __net_initdata struct pernet_operations ip_proc_ops = { 486 .init = ip_proc_init_net, 487 .exit = ip_proc_exit_net, 488}; 489 490int __init ip_misc_proc_init(void) 491{ 492 return register_pernet_subsys(&ip_proc_ops); 493} 494