/* * INET An implementation of the TCP/IP protocol suite for the LINUX * operating system. INET is implemented using the BSD Socket * interface as the means of communication with the user level. * * This file implements the various access functions for the * PROC file system. It is mainly used for debugging and * statistics. * * Version: $Id: proc.c,v 1.45 2001/05/16 16:45:35 davem Exp $ * * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> * Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de> * Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de> * Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de> * * Fixes: * Alan Cox : UDP sockets show the rxqueue/txqueue * using hint flag for the netinfo. * Pauline Middelink : identd support * Alan Cox : Make /proc safer. * Erik Schoenfelder : /proc/net/snmp * Alan Cox : Handle dead sockets properly. * Gerhard Koerting : Show both timers * Alan Cox : Allow inode to be NULL (kernel socket) * Andi Kleen : Add support for open_requests and * split functions for more readibility. * Andi Kleen : Add support for /proc/net/netstat * Arnaldo C. Melo : Convert to seq_file * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <linux/types.h> #include <net/icmp.h> #include <net/protocol.h> #include <net/tcp.h> #include <net/udp.h> #include <linux/inetdevice.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <net/sock.h> #include <net/raw.h> static int fold_prot_inuse(struct proto *proto) { int res = 0; int cpu; for_each_possible_cpu(cpu) res += proto->stats[cpu].inuse; return res; } /* * Report socket allocation statistics [mea@utu.fi] */ static int sockstat_seq_show(struct seq_file *seq, void *v) { socket_seq_show(seq); seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n", fold_prot_inuse(&tcp_prot), atomic_read(&tcp_orphan_count), tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated), atomic_read(&tcp_memory_allocated)); seq_printf(seq, "UDP: inuse %d\n", fold_prot_inuse(&udp_prot)); seq_printf(seq, "RAW: inuse %d\n", fold_prot_inuse(&raw_prot)); seq_printf(seq, "FRAG: inuse %d memory %d\n", ip_frag_nqueues, atomic_read(&ip_frag_mem)); return 0; } static int sockstat_seq_open(struct inode *inode, struct file *file) { return single_open(file, sockstat_seq_show, NULL); } static struct file_operations sockstat_seq_fops = { .owner = THIS_MODULE, .open = sockstat_seq_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static unsigned long fold_field(void *mib[], int offt) { unsigned long res = 0; int i; for_each_possible_cpu(i) { res += *(((unsigned long *) per_cpu_ptr(mib[0], i)) + offt); res += *(((unsigned long *) per_cpu_ptr(mib[1], i)) + offt); } return res; } /* snmp items */ static const struct snmp_mib snmp4_ipstats_list[] = { SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES), SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS), SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS), SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS), SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS), SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS), SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS), SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS), SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS), SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS), SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS), SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS), SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES), SNMP_MIB_SENTINEL }; static const struct snmp_mib snmp4_icmp_list[] = { SNMP_MIB_ITEM("InMsgs", ICMP_MIB_INMSGS), SNMP_MIB_ITEM("InErrors", ICMP_MIB_INERRORS), SNMP_MIB_ITEM("InDestUnreachs", ICMP_MIB_INDESTUNREACHS), SNMP_MIB_ITEM("InTimeExcds", ICMP_MIB_INTIMEEXCDS), SNMP_MIB_ITEM("InParmProbs", ICMP_MIB_INPARMPROBS), SNMP_MIB_ITEM("InSrcQuenchs", ICMP_MIB_INSRCQUENCHS), SNMP_MIB_ITEM("InRedirects", ICMP_MIB_INREDIRECTS), SNMP_MIB_ITEM("InEchos", ICMP_MIB_INECHOS), SNMP_MIB_ITEM("InEchoReps", ICMP_MIB_INECHOREPS), SNMP_MIB_ITEM("InTimestamps", ICMP_MIB_INTIMESTAMPS), SNMP_MIB_ITEM("InTimestampReps", ICMP_MIB_INTIMESTAMPREPS), SNMP_MIB_ITEM("InAddrMasks", ICMP_MIB_INADDRMASKS), SNMP_MIB_ITEM("InAddrMaskReps", ICMP_MIB_INADDRMASKREPS), SNMP_MIB_ITEM("OutMsgs", ICMP_MIB_OUTMSGS), SNMP_MIB_ITEM("OutErrors", ICMP_MIB_OUTERRORS), SNMP_MIB_ITEM("OutDestUnreachs", ICMP_MIB_OUTDESTUNREACHS), SNMP_MIB_ITEM("OutTimeExcds", ICMP_MIB_OUTTIMEEXCDS), SNMP_MIB_ITEM("OutParmProbs", ICMP_MIB_OUTPARMPROBS), SNMP_MIB_ITEM("OutSrcQuenchs", ICMP_MIB_OUTSRCQUENCHS), SNMP_MIB_ITEM("OutRedirects", ICMP_MIB_OUTREDIRECTS), SNMP_MIB_ITEM("OutEchos", ICMP_MIB_OUTECHOS), SNMP_MIB_ITEM("OutEchoReps", ICMP_MIB_OUTECHOREPS), SNMP_MIB_ITEM("OutTimestamps", ICMP_MIB_OUTTIMESTAMPS), SNMP_MIB_ITEM("OutTimestampReps", ICMP_MIB_OUTTIMESTAMPREPS), SNMP_MIB_ITEM("OutAddrMasks", ICMP_MIB_OUTADDRMASKS), SNMP_MIB_ITEM("OutAddrMaskReps", ICMP_MIB_OUTADDRMASKREPS), SNMP_MIB_SENTINEL }; static const struct snmp_mib snmp4_tcp_list[] = { SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM), SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN), SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX), SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN), SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS), SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS), SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS), SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS), SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB), SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS), SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS), SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS), SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS), SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS), SNMP_MIB_SENTINEL }; static const struct snmp_mib snmp4_udp_list[] = { SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS), SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS), SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS), SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS), SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS), SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS), SNMP_MIB_SENTINEL }; static const struct snmp_mib snmp4_net_list[] = { SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT), SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV), SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED), SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS), SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED), SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED), SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED), SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS), SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS), SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER), SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED), SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED), SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED), SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED), SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED), SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED), SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS), SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED), SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST), SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS), SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS), SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED), SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG), SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE), SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED), SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS), SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER), SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS), SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS), SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY), SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY), SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING), SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER), SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER), SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER), SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER), SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO), SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO), SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO), SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO), SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS), SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT), SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES), SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES), SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES), SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS), SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS), SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS), SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS), SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL), SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL), SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED), SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED), SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT), SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT), SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV), SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV), SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN), SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA), SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE), SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY), SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT), SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER), SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED), SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES), SNMP_MIB_SENTINEL }; /* * Called from the PROCfs module. This outputs /proc/net/snmp. */ static int snmp_seq_show(struct seq_file *seq, void *v) { int i; seq_puts(seq, "Ip: Forwarding DefaultTTL"); for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) seq_printf(seq, " %s", snmp4_ipstats_list[i].name); seq_printf(seq, "\nIp: %d %d", ipv4_devconf.forwarding ? 1 : 2, sysctl_ip_default_ttl); for (i = 0; snmp4_ipstats_list[i].name != NULL; i++) seq_printf(seq, " %lu", fold_field((void **) ip_statistics, snmp4_ipstats_list[i].entry)); seq_puts(seq, "\nIcmp:"); for (i = 0; snmp4_icmp_list[i].name != NULL; i++) seq_printf(seq, " %s", snmp4_icmp_list[i].name); seq_puts(seq, "\nIcmp:"); for (i = 0; snmp4_icmp_list[i].name != NULL; i++) seq_printf(seq, " %lu", fold_field((void **) icmp_statistics, snmp4_icmp_list[i].entry)); seq_puts(seq, "\nTcp:"); for (i = 0; snmp4_tcp_list[i].name != NULL; i++) seq_printf(seq, " %s", snmp4_tcp_list[i].name); seq_puts(seq, "\nTcp:"); for (i = 0; snmp4_tcp_list[i].name != NULL; i++) { /* MaxConn field is signed, RFC 2012 */ if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN) seq_printf(seq, " %ld", fold_field((void **) tcp_statistics, snmp4_tcp_list[i].entry)); else seq_printf(seq, " %lu", fold_field((void **) tcp_statistics, snmp4_tcp_list[i].entry)); } seq_puts(seq, "\nUdp:"); for (i = 0; snmp4_udp_list[i].name != NULL; i++) seq_printf(seq, " %s", snmp4_udp_list[i].name); seq_puts(seq, "\nUdp:"); for (i = 0; snmp4_udp_list[i].name != NULL; i++) seq_printf(seq, " %lu", fold_field((void **) udp_statistics, snmp4_udp_list[i].entry)); seq_putc(seq, '\n'); return 0; } static int snmp_seq_open(struct inode *inode, struct file *file) { return single_open(file, snmp_seq_show, NULL); } static struct file_operations snmp_seq_fops = { .owner = THIS_MODULE, .open = snmp_seq_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; /* * Output /proc/net/netstat */ static int netstat_seq_show(struct seq_file *seq, void *v) { int i; seq_puts(seq, "TcpExt:"); for (i = 0; snmp4_net_list[i].name != NULL; i++) seq_printf(seq, " %s", snmp4_net_list[i].name); seq_puts(seq, "\nTcpExt:"); for (i = 0; snmp4_net_list[i].name != NULL; i++) seq_printf(seq, " %lu", fold_field((void **) net_statistics, snmp4_net_list[i].entry)); seq_putc(seq, '\n'); return 0; } static int netstat_seq_open(struct inode *inode, struct file *file) { return single_open(file, netstat_seq_show, NULL); } static struct file_operations netstat_seq_fops = { .owner = THIS_MODULE, .open = netstat_seq_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; int __init ip_misc_proc_init(void) { int rc = 0; if (!proc_net_fops_create("netstat", S_IRUGO, &netstat_seq_fops)) goto out_netstat; if (!proc_net_fops_create("snmp", S_IRUGO, &snmp_seq_fops)) goto out_snmp; if (!proc_net_fops_create("sockstat", S_IRUGO, &sockstat_seq_fops)) goto out_sockstat; out: return rc; out_sockstat: proc_net_remove("snmp"); out_snmp: proc_net_remove("netstat"); out_netstat: rc = -ENOMEM; goto out; }