9a32144e9d
Many struct file_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
394 lines
14 KiB
C
394 lines
14 KiB
C
/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* This file implements the various access functions for the
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* PROC file system. It is mainly used for debugging and
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* statistics.
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*
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* Version: $Id: proc.c,v 1.45 2001/05/16 16:45:35 davem Exp $
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*
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* Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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* Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
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* Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
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* Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de>
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*
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* Fixes:
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* Alan Cox : UDP sockets show the rxqueue/txqueue
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* using hint flag for the netinfo.
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* Pauline Middelink : identd support
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* Alan Cox : Make /proc safer.
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* Erik Schoenfelder : /proc/net/snmp
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* Alan Cox : Handle dead sockets properly.
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* Gerhard Koerting : Show both timers
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* Alan Cox : Allow inode to be NULL (kernel socket)
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* Andi Kleen : Add support for open_requests and
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* split functions for more readibility.
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* Andi Kleen : Add support for /proc/net/netstat
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* Arnaldo C. Melo : Convert to seq_file
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/types.h>
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#include <net/icmp.h>
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#include <net/protocol.h>
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#include <net/tcp.h>
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#include <net/udp.h>
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#include <net/udplite.h>
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#include <linux/inetdevice.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <net/sock.h>
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#include <net/raw.h>
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static int fold_prot_inuse(struct proto *proto)
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{
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int res = 0;
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int cpu;
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for_each_possible_cpu(cpu)
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res += proto->stats[cpu].inuse;
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return res;
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}
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/*
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* Report socket allocation statistics [mea@utu.fi]
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*/
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static int sockstat_seq_show(struct seq_file *seq, void *v)
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{
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socket_seq_show(seq);
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seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
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fold_prot_inuse(&tcp_prot), atomic_read(&tcp_orphan_count),
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tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated),
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atomic_read(&tcp_memory_allocated));
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seq_printf(seq, "UDP: inuse %d\n", fold_prot_inuse(&udp_prot));
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seq_printf(seq, "UDPLITE: inuse %d\n", fold_prot_inuse(&udplite_prot));
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seq_printf(seq, "RAW: inuse %d\n", fold_prot_inuse(&raw_prot));
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seq_printf(seq, "FRAG: inuse %d memory %d\n", ip_frag_nqueues,
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atomic_read(&ip_frag_mem));
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return 0;
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}
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static int sockstat_seq_open(struct inode *inode, struct file *file)
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{
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return single_open(file, sockstat_seq_show, NULL);
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}
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static const struct file_operations sockstat_seq_fops = {
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.owner = THIS_MODULE,
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.open = sockstat_seq_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static unsigned long
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fold_field(void *mib[], int offt)
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{
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unsigned long res = 0;
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int i;
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for_each_possible_cpu(i) {
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res += *(((unsigned long *) per_cpu_ptr(mib[0], i)) + offt);
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res += *(((unsigned long *) per_cpu_ptr(mib[1], i)) + offt);
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}
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return res;
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}
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/* snmp items */
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static const struct snmp_mib snmp4_ipstats_list[] = {
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SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
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SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
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SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
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SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
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SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
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SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
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SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
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SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTREQUESTS),
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SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
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SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
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SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
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SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
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SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
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SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
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SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
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SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
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SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
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SNMP_MIB_SENTINEL
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};
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static const struct snmp_mib snmp4_icmp_list[] = {
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SNMP_MIB_ITEM("InMsgs", ICMP_MIB_INMSGS),
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SNMP_MIB_ITEM("InErrors", ICMP_MIB_INERRORS),
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SNMP_MIB_ITEM("InDestUnreachs", ICMP_MIB_INDESTUNREACHS),
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SNMP_MIB_ITEM("InTimeExcds", ICMP_MIB_INTIMEEXCDS),
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SNMP_MIB_ITEM("InParmProbs", ICMP_MIB_INPARMPROBS),
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SNMP_MIB_ITEM("InSrcQuenchs", ICMP_MIB_INSRCQUENCHS),
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SNMP_MIB_ITEM("InRedirects", ICMP_MIB_INREDIRECTS),
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SNMP_MIB_ITEM("InEchos", ICMP_MIB_INECHOS),
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SNMP_MIB_ITEM("InEchoReps", ICMP_MIB_INECHOREPS),
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SNMP_MIB_ITEM("InTimestamps", ICMP_MIB_INTIMESTAMPS),
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SNMP_MIB_ITEM("InTimestampReps", ICMP_MIB_INTIMESTAMPREPS),
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SNMP_MIB_ITEM("InAddrMasks", ICMP_MIB_INADDRMASKS),
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SNMP_MIB_ITEM("InAddrMaskReps", ICMP_MIB_INADDRMASKREPS),
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SNMP_MIB_ITEM("OutMsgs", ICMP_MIB_OUTMSGS),
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SNMP_MIB_ITEM("OutErrors", ICMP_MIB_OUTERRORS),
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SNMP_MIB_ITEM("OutDestUnreachs", ICMP_MIB_OUTDESTUNREACHS),
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SNMP_MIB_ITEM("OutTimeExcds", ICMP_MIB_OUTTIMEEXCDS),
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SNMP_MIB_ITEM("OutParmProbs", ICMP_MIB_OUTPARMPROBS),
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SNMP_MIB_ITEM("OutSrcQuenchs", ICMP_MIB_OUTSRCQUENCHS),
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SNMP_MIB_ITEM("OutRedirects", ICMP_MIB_OUTREDIRECTS),
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SNMP_MIB_ITEM("OutEchos", ICMP_MIB_OUTECHOS),
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SNMP_MIB_ITEM("OutEchoReps", ICMP_MIB_OUTECHOREPS),
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SNMP_MIB_ITEM("OutTimestamps", ICMP_MIB_OUTTIMESTAMPS),
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SNMP_MIB_ITEM("OutTimestampReps", ICMP_MIB_OUTTIMESTAMPREPS),
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SNMP_MIB_ITEM("OutAddrMasks", ICMP_MIB_OUTADDRMASKS),
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SNMP_MIB_ITEM("OutAddrMaskReps", ICMP_MIB_OUTADDRMASKREPS),
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SNMP_MIB_SENTINEL
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};
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static const struct snmp_mib snmp4_tcp_list[] = {
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SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
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SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
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SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
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SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
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SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
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SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
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SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
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SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
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SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
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SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
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SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
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SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
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SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
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SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
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SNMP_MIB_SENTINEL
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};
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static const struct snmp_mib snmp4_udp_list[] = {
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SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
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SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
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SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
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SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
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SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
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SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
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SNMP_MIB_SENTINEL
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};
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static const struct snmp_mib snmp4_net_list[] = {
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SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
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SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
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SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
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SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
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SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
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SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
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SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
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SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
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SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
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SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
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SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
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SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
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SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
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SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
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SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
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SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
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SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
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SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
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SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
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SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
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SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
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SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
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SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
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SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
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SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
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SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
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SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
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SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
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SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
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SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
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SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
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SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
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SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
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SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
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SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
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SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
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SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
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SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
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SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
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SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
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SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
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SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
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SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
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SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
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SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
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SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
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SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
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SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
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SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
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SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
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SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
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SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
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SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
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SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
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SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
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SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
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SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
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SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
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SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
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SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
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SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
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SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
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SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
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SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
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SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
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SNMP_MIB_SENTINEL
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};
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/*
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* Called from the PROCfs module. This outputs /proc/net/snmp.
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*/
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static int snmp_seq_show(struct seq_file *seq, void *v)
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{
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int i;
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seq_puts(seq, "Ip: Forwarding DefaultTTL");
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for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
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seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
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seq_printf(seq, "\nIp: %d %d",
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ipv4_devconf.forwarding ? 1 : 2, sysctl_ip_default_ttl);
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for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
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seq_printf(seq, " %lu",
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fold_field((void **) ip_statistics,
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snmp4_ipstats_list[i].entry));
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seq_puts(seq, "\nIcmp:");
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for (i = 0; snmp4_icmp_list[i].name != NULL; i++)
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seq_printf(seq, " %s", snmp4_icmp_list[i].name);
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seq_puts(seq, "\nIcmp:");
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for (i = 0; snmp4_icmp_list[i].name != NULL; i++)
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seq_printf(seq, " %lu",
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fold_field((void **) icmp_statistics,
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snmp4_icmp_list[i].entry));
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seq_puts(seq, "\nTcp:");
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for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
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seq_printf(seq, " %s", snmp4_tcp_list[i].name);
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seq_puts(seq, "\nTcp:");
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for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
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/* MaxConn field is signed, RFC 2012 */
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if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
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seq_printf(seq, " %ld",
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fold_field((void **) tcp_statistics,
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snmp4_tcp_list[i].entry));
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else
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seq_printf(seq, " %lu",
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fold_field((void **) tcp_statistics,
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snmp4_tcp_list[i].entry));
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}
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seq_puts(seq, "\nUdp:");
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for (i = 0; snmp4_udp_list[i].name != NULL; i++)
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seq_printf(seq, " %s", snmp4_udp_list[i].name);
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seq_puts(seq, "\nUdp:");
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for (i = 0; snmp4_udp_list[i].name != NULL; i++)
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seq_printf(seq, " %lu",
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fold_field((void **) udp_statistics,
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snmp4_udp_list[i].entry));
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/* the UDP and UDP-Lite MIBs are the same */
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seq_puts(seq, "\nUdpLite:");
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for (i = 0; snmp4_udp_list[i].name != NULL; i++)
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seq_printf(seq, " %s", snmp4_udp_list[i].name);
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seq_puts(seq, "\nUdpLite:");
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for (i = 0; snmp4_udp_list[i].name != NULL; i++)
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seq_printf(seq, " %lu",
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fold_field((void **) udplite_statistics,
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snmp4_udp_list[i].entry) );
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seq_putc(seq, '\n');
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return 0;
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}
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static int snmp_seq_open(struct inode *inode, struct file *file)
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{
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return single_open(file, snmp_seq_show, NULL);
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}
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static const struct file_operations snmp_seq_fops = {
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.owner = THIS_MODULE,
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.open = snmp_seq_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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/*
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* Output /proc/net/netstat
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*/
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static int netstat_seq_show(struct seq_file *seq, void *v)
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{
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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 const 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;
|
|
}
|
|
|