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/*
* 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
*
* 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 <asm/system.h>
#include <linux/sched.h>
#include <linux/socket.h>
#include <linux/net.h>
#include <linux/un.h>
#include <linux/in.h>
#include <linux/param.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <net/ip.h>
#include <net/icmp.h>
#include <net/protocol.h>
#include <net/tcp.h>
#include <net/udp.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/raw.h>
static int fold_prot_inuse(struct proto *proto)
{
int res = 0;
int cpu;
for (cpu=0; cpu<smp_num_cpus; cpu++)
res += proto->stats[cpu_logical_map(cpu)].inuse;
return res;
}
/*
* Report socket allocation statistics [mea@utu.fi]
*/
int afinet_get_info(char *buffer, char **start, off_t offset, int length)
{
/* From net/socket.c */
extern int socket_get_info(char *, char **, off_t, int);
int len = socket_get_info(buffer,start,offset,length);
len += sprintf(buffer+len,"TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
fold_prot_inuse(&tcp_prot),
atomic_read(&tcp_orphan_count), tcp_tw_count,
atomic_read(&tcp_sockets_allocated),
atomic_read(&tcp_memory_allocated));
len += sprintf(buffer+len,"UDP: inuse %d\n",
fold_prot_inuse(&udp_prot));
len += sprintf(buffer+len,"RAW: inuse %d\n",
fold_prot_inuse(&raw_prot));
len += sprintf(buffer+len, "FRAG: inuse %d memory %d\n",
ip_frag_nqueues, atomic_read(&ip_frag_mem));
if (offset >= len)
{
*start = buffer;
return 0;
}
*start = buffer + offset;
len -= offset;
if (len > length)
len = length;
if (len < 0)
len = 0;
return len;
}
static unsigned long fold_field(unsigned long *begin, int sz, int nr)
{
unsigned long res = 0;
int i;
sz /= sizeof(unsigned long);
for (i=0; i<smp_num_cpus; i++) {
res += begin[2*cpu_logical_map(i)*sz + nr];
res += begin[(2*cpu_logical_map(i)+1)*sz + nr];
}
return res;
}
/*
* Called from the PROCfs module. This outputs /proc/net/snmp.
*/
int snmp_get_info(char *buffer, char **start, off_t offset, int length)
{
extern int sysctl_ip_default_ttl;
int len, i;
len = sprintf (buffer,
"Ip: Forwarding DefaultTTL InReceives InHdrErrors InAddrErrors ForwDatagrams InUnknownProtos InDiscards InDelivers OutRequests OutDiscards OutNoRoutes ReasmTimeout ReasmReqds ReasmOKs ReasmFails FragOKs FragFails FragCreates\n"
"Ip: %d %d", ipv4_devconf.forwarding ? 1 : 2, sysctl_ip_default_ttl);
for (i=0; i<offsetof(struct ip_mib, __pad)/sizeof(unsigned long); i++)
len += sprintf(buffer+len, " %lu", fold_field((unsigned long*)ip_statistics, sizeof(struct ip_mib), i));
len += sprintf (buffer + len,
"\nIcmp: InMsgs InErrors InDestUnreachs InTimeExcds InParmProbs InSrcQuenchs InRedirects InEchos InEchoReps InTimestamps InTimestampReps InAddrMasks InAddrMaskReps OutMsgs OutErrors OutDestUnreachs OutTimeExcds OutParmProbs OutSrcQuenchs OutRedirects OutEchos OutEchoReps OutTimestamps OutTimestampReps OutAddrMasks OutAddrMaskReps\n"
"Icmp:");
for (i=0; i<offsetof(struct icmp_mib, __pad)/sizeof(unsigned long); i++)
len += sprintf(buffer+len, " %lu", fold_field((unsigned long*)icmp_statistics, sizeof(struct icmp_mib), i));
len += sprintf (buffer + len,
"\nTcp: RtoAlgorithm RtoMin RtoMax MaxConn ActiveOpens PassiveOpens AttemptFails EstabResets CurrEstab InSegs OutSegs RetransSegs InErrs OutRsts\n"
"Tcp:");
for (i=0; i<offsetof(struct tcp_mib, __pad)/sizeof(unsigned long); i++)
len += sprintf(buffer+len, " %lu", fold_field((unsigned long*)tcp_statistics, sizeof(struct tcp_mib), i));
len += sprintf (buffer + len,
"\nUdp: InDatagrams NoPorts InErrors OutDatagrams\n"
"Udp:");
for (i=0; i<offsetof(struct udp_mib, __pad)/sizeof(unsigned long); i++)
len += sprintf(buffer+len, " %lu", fold_field((unsigned long*)udp_statistics, sizeof(struct udp_mib), i));
len += sprintf (buffer + len, "\n");
if (offset >= len)
{
*start = buffer;
return 0;
}
*start = buffer + offset;
len -= offset;
if (len > length)
len = length;
if (len < 0)
len = 0;
return len;
}
/*
* Output /proc/net/netstat
*/
int netstat_get_info(char *buffer, char **start, off_t offset, int length)
{
int len, i;
len = sprintf(buffer,
"TcpExt: SyncookiesSent SyncookiesRecv SyncookiesFailed"
" EmbryonicRsts PruneCalled RcvPruned OfoPruned"
" OutOfWindowIcmps LockDroppedIcmps ArpFilter"
" TW TWRecycled TWKilled"
" PAWSPassive PAWSActive PAWSEstab"
" DelayedACKs DelayedACKLocked DelayedACKLost"
" ListenOverflows ListenDrops"
" TCPPrequeued TCPDirectCopyFromBacklog"
" TCPDirectCopyFromPrequeue TCPPrequeueDropped"
" TCPHPHits TCPHPHitsToUser"
" TCPPureAcks TCPHPAcks"
" TCPRenoRecovery TCPSackRecovery"
" TCPSACKReneging"
" TCPFACKReorder TCPSACKReorder TCPRenoReorder TCPTSReorder"
" TCPFullUndo TCPPartialUndo TCPDSACKUndo TCPLossUndo"
" TCPLoss TCPLostRetransmit"
" TCPRenoFailures TCPSackFailures TCPLossFailures"
" TCPFastRetrans TCPForwardRetrans TCPSlowStartRetrans"
" TCPTimeouts"
" TCPRenoRecoveryFail TCPSackRecoveryFail"
" TCPSchedulerFailed TCPRcvCollapsed"
" TCPDSACKOldSent TCPDSACKOfoSent TCPDSACKRecv TCPDSACKOfoRecv"
" TCPAbortOnSyn TCPAbortOnData TCPAbortOnClose"
" TCPAbortOnMemory TCPAbortOnTimeout TCPAbortOnLinger"
" TCPAbortFailed TCPMemoryPressures\n"
"TcpExt:");
for (i=0; i<offsetof(struct linux_mib, __pad)/sizeof(unsigned long); i++)
len += sprintf(buffer+len, " %lu", fold_field((unsigned long*)net_statistics, sizeof(struct linux_mib), i));
len += sprintf (buffer + len, "\n");
if (offset >= len)
{
*start = buffer;
return 0;
}
*start = buffer + offset;
len -= offset;
if (len > length)
len = length;
if (len < 0)
len = 0;
return len;
}
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