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/icmp.h> 38 #include <net/protocol.h> 39 #include <net/tcp.h> 40 #include <net/udp.h> 41 #include <linux/inetdevice.h> 42 #include <linux/proc_fs.h> 43 #include <linux/seq_file.h> 44 #include <net/sock.h> 45 #include <net/raw.h> 46 47 static int fold_prot_inuse(struct proto *proto) 48 { 49 int res = 0; 50 int cpu; 51 52 for_each_possible_cpu(cpu) 53 res += proto->stats[cpu].inuse; 54 55 return res; 56 } 57 58 /* 59 * Report socket allocation statistics [mea@utu.fi] 60 */ 61 static int sockstat_seq_show(struct seq_file *seq, void *v) 62 { 63 socket_seq_show(seq); 64 seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n", 65 fold_prot_inuse(&tcp_prot), atomic_read(&tcp_orphan_count), 66 tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated), 67 atomic_read(&tcp_memory_allocated)); 68 seq_printf(seq, "UDP: inuse %d\n", fold_prot_inuse(&udp_prot)); 69 seq_printf(seq, "RAW: inuse %d\n", fold_prot_inuse(&raw_prot)); 70 seq_printf(seq, "FRAG: inuse %d memory %d\n", ip_frag_nqueues, 71 atomic_read(&ip_frag_mem)); 72 return 0; 73 } 74 75 static int sockstat_seq_open(struct inode *inode, struct file *file) 76 { 77 return single_open(file, sockstat_seq_show, NULL); 78 } 79 80 static struct file_operations sockstat_seq_fops = { 81 .owner = THIS_MODULE, 82 .open = sockstat_seq_open, 83 .read = seq_read, 84 .llseek = seq_lseek, 85 .release = single_release, 86 }; 87 88 static unsigned long 89 fold_field(void *mib[], int offt) 90 { 91 unsigned long res = 0; 92 int i; 93 94 for_each_possible_cpu(i) { 95 res += *(((unsigned long *) per_cpu_ptr(mib[0], i)) + offt); 96 res += *(((unsigned long *) per_cpu_ptr(mib[1], i)) + offt); 97 } 98 return res; 99 } 100 101 /* snmp items */ 102 static const struct snmp_mib snmp4_ipstats_list[] = { 103 SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES), 104 SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS), 105 SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS), 106 SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 107 SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 108 SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS), 109 SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS), 110 SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS), 111 SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS), 112 SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 113 SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 114 SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS), 115 SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS), 116 SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS), 117 SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS), 118 SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS), 119 SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES), 120 SNMP_MIB_SENTINEL 121 }; 122 123 static const struct snmp_mib snmp4_icmp_list[] = { 124 SNMP_MIB_ITEM("InMsgs", ICMP_MIB_INMSGS), 125 SNMP_MIB_ITEM("InErrors", ICMP_MIB_INERRORS), 126 SNMP_MIB_ITEM("InDestUnreachs", ICMP_MIB_INDESTUNREACHS), 127 SNMP_MIB_ITEM("InTimeExcds", ICMP_MIB_INTIMEEXCDS), 128 SNMP_MIB_ITEM("InParmProbs", ICMP_MIB_INPARMPROBS), 129 SNMP_MIB_ITEM("InSrcQuenchs", ICMP_MIB_INSRCQUENCHS), 130 SNMP_MIB_ITEM("InRedirects", ICMP_MIB_INREDIRECTS), 131 SNMP_MIB_ITEM("InEchos", ICMP_MIB_INECHOS), 132 SNMP_MIB_ITEM("InEchoReps", ICMP_MIB_INECHOREPS), 133 SNMP_MIB_ITEM("InTimestamps", ICMP_MIB_INTIMESTAMPS), 134 SNMP_MIB_ITEM("InTimestampReps", ICMP_MIB_INTIMESTAMPREPS), 135 SNMP_MIB_ITEM("InAddrMasks", ICMP_MIB_INADDRMASKS), 136 SNMP_MIB_ITEM("InAddrMaskReps", ICMP_MIB_INADDRMASKREPS), 137 SNMP_MIB_ITEM("OutMsgs", ICMP_MIB_OUTMSGS), 138 SNMP_MIB_ITEM("OutErrors", ICMP_MIB_OUTERRORS), 139 SNMP_MIB_ITEM("OutDestUnreachs", ICMP_MIB_OUTDESTUNREACHS), 140 SNMP_MIB_ITEM("OutTimeExcds", ICMP_MIB_OUTTIMEEXCDS), 141 SNMP_MIB_ITEM("OutParmProbs", ICMP_MIB_OUTPARMPROBS), 142 SNMP_MIB_ITEM("OutSrcQuenchs", ICMP_MIB_OUTSRCQUENCHS), 143 SNMP_MIB_ITEM("OutRedirects", ICMP_MIB_OUTREDIRECTS), 144 SNMP_MIB_ITEM("OutEchos", ICMP_MIB_OUTECHOS), 145 SNMP_MIB_ITEM("OutEchoReps", ICMP_MIB_OUTECHOREPS), 146 SNMP_MIB_ITEM("OutTimestamps", ICMP_MIB_OUTTIMESTAMPS), 147 SNMP_MIB_ITEM("OutTimestampReps", ICMP_MIB_OUTTIMESTAMPREPS), 148 SNMP_MIB_ITEM("OutAddrMasks", ICMP_MIB_OUTADDRMASKS), 149 SNMP_MIB_ITEM("OutAddrMaskReps", ICMP_MIB_OUTADDRMASKREPS), 150 SNMP_MIB_SENTINEL 151 }; 152 153 static const struct snmp_mib snmp4_tcp_list[] = { 154 SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM), 155 SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN), 156 SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX), 157 SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN), 158 SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS), 159 SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS), 160 SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS), 161 SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS), 162 SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB), 163 SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS), 164 SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS), 165 SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS), 166 SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS), 167 SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS), 168 SNMP_MIB_SENTINEL 169 }; 170 171 static const struct snmp_mib snmp4_udp_list[] = { 172 SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS), 173 SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS), 174 SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS), 175 SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS), 176 SNMP_MIB_SENTINEL 177 }; 178 179 static const struct snmp_mib snmp4_net_list[] = { 180 SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), 181 SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), 182 SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), 183 SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), 184 SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), 185 SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), 186 SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), 187 SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), 188 SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), 189 SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), 190 SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), 191 SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), 192 SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), 193 SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED), 194 SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), 195 SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), 196 SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), 197 SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), 198 SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), 199 SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), 200 SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), 201 SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED), 202 SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG), 203 SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE), 204 SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED), 205 SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), 206 SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER), 207 SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), 208 SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), 209 SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), 210 SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), 211 SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), 212 SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER), 213 SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), 214 SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), 215 SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), 216 SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), 217 SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), 218 SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), 219 SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), 220 SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS), 221 SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), 222 SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), 223 SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), 224 SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), 225 SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), 226 SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS), 227 SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), 228 SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), 229 SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), 230 SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), 231 SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED), 232 SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), 233 SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), 234 SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), 235 SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), 236 SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), 237 SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN), 238 SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), 239 SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), 240 SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), 241 SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), 242 SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), 243 SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), 244 SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), 245 SNMP_MIB_SENTINEL 246 }; 247 248 /* 249 * Called from the PROCfs module. This outputs /proc/net/snmp. 250 */ 251 static int snmp_seq_show(struct seq_file *seq, void *v) 252 { 253 int i; 254 255 seq_puts(seq, "Ip: Forwarding DefaultTTL"); 256 257 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) 258 seq_printf(seq, " %s", snmp4_ipstats_list[i].name); 259 260 seq_printf(seq, "\nIp: %d %d", 261 ipv4_devconf.forwarding ? 1 : 2, sysctl_ip_default_ttl); 262 263 for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) 264 seq_printf(seq, " %lu", 265 fold_field((void **) ip_statistics, 266 snmp4_ipstats_list[i].entry)); 267 268 seq_puts(seq, "\nIcmp:"); 269 for (i = 0; snmp4_icmp_list[i].name != NULL; i++) 270 seq_printf(seq, " %s", snmp4_icmp_list[i].name); 271 272 seq_puts(seq, "\nIcmp:"); 273 for (i = 0; snmp4_icmp_list[i].name != NULL; i++) 274 seq_printf(seq, " %lu", 275 fold_field((void **) icmp_statistics, 276 snmp4_icmp_list[i].entry)); 277 278 seq_puts(seq, "\nTcp:"); 279 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) 280 seq_printf(seq, " %s", snmp4_tcp_list[i].name); 281 282 seq_puts(seq, "\nTcp:"); 283 for (i = 0; snmp4_tcp_list[i].name != NULL; i++) { 284 /* MaxConn field is signed, RFC 2012 */ 285 if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) 286 seq_printf(seq, " %ld", 287 fold_field((void **) tcp_statistics, 288 snmp4_tcp_list[i].entry)); 289 else 290 seq_printf(seq, " %lu", 291 fold_field((void **) tcp_statistics, 292 snmp4_tcp_list[i].entry)); 293 } 294 295 seq_puts(seq, "\nUdp:"); 296 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 297 seq_printf(seq, " %s", snmp4_udp_list[i].name); 298 299 seq_puts(seq, "\nUdp:"); 300 for (i = 0; snmp4_udp_list[i].name != NULL; i++) 301 seq_printf(seq, " %lu", 302 fold_field((void **) udp_statistics, 303 snmp4_udp_list[i].entry)); 304 305 seq_putc(seq, '\n'); 306 return 0; 307 } 308 309 static int snmp_seq_open(struct inode *inode, struct file *file) 310 { 311 return single_open(file, snmp_seq_show, NULL); 312 } 313 314 static struct file_operations snmp_seq_fops = { 315 .owner = THIS_MODULE, 316 .open = snmp_seq_open, 317 .read = seq_read, 318 .llseek = seq_lseek, 319 .release = single_release, 320 }; 321 322 /* 323 * Output /proc/net/netstat 324 */ 325 static int netstat_seq_show(struct seq_file *seq, void *v) 326 { 327 int i; 328 329 seq_puts(seq, "TcpExt:"); 330 for (i = 0; snmp4_net_list[i].name != NULL; i++) 331 seq_printf(seq, " %s", snmp4_net_list[i].name); 332 333 seq_puts(seq, "\nTcpExt:"); 334 for (i = 0; snmp4_net_list[i].name != NULL; i++) 335 seq_printf(seq, " %lu", 336 fold_field((void **) net_statistics, 337 snmp4_net_list[i].entry)); 338 339 seq_putc(seq, '\n'); 340 return 0; 341 } 342 343 static int netstat_seq_open(struct inode *inode, struct file *file) 344 { 345 return single_open(file, netstat_seq_show, NULL); 346 } 347 348 static struct file_operations netstat_seq_fops = { 349 .owner = THIS_MODULE, 350 .open = netstat_seq_open, 351 .read = seq_read, 352 .llseek = seq_lseek, 353 .release = single_release, 354 }; 355 356 int __init ip_misc_proc_init(void) 357 { 358 int rc = 0; 359 360 if (!proc_net_fops_create("netstat", S_IRUGO, &netstat_seq_fops)) 361 goto out_netstat; 362 363 if (!proc_net_fops_create("snmp", S_IRUGO, &snmp_seq_fops)) 364 goto out_snmp; 365 366 if (!proc_net_fops_create("sockstat", S_IRUGO, &sockstat_seq_fops)) 367 goto out_sockstat; 368 out: 369 return rc; 370 out_sockstat: 371 proc_net_remove("snmp"); 372 out_snmp: 373 proc_net_remove("netstat"); 374 out_netstat: 375 rc = -ENOMEM; 376 goto out; 377 } 378 379