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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
* 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/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 (cpu = 0; cpu < NR_CPUS; 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)
{
/* From net/socket.c */
extern void socket_seq_show(struct seq_file *seq);
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_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 nr)
{
unsigned long res = 0;
int i;
for (i = 0; i < NR_CPUS; i++) {
if (!cpu_possible(i))
continue;
res +=
*((unsigned long *) (((void *) per_cpu_ptr(mib[0], i)) +
sizeof (unsigned long) * nr));
res +=
*((unsigned long *) (((void *) per_cpu_ptr(mib[1], i)) +
sizeof (unsigned long) * nr));
}
return res;
}
/*
* Called from the PROCfs module. This outputs /proc/net/snmp.
*/
static int snmp_seq_show(struct seq_file *seq, void *v)
{
int i;
seq_printf(seq, "Ip: Forwarding DefaultTTL InReceives InHdrErrors "
"InAddrErrors ForwDatagrams InUnknownProtos "
"InDiscards InDelivers OutRequests OutDiscards "
"OutNoRoutes ReasmTimeout ReasmReqds ReasmOKs "
"ReasmFails FragOKs FragFails FragCreates\nIp: %d %d",
ipv4_devconf.forwarding ? 1 : 2, sysctl_ip_default_ttl);
for (i = 0;
i < offsetof(struct ip_mib, __pad) / sizeof(unsigned long); i++)
seq_printf(seq, " %lu",
fold_field((void **) ip_statistics, i));
seq_printf(seq, "\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\nIcmp:");
for (i = 0;
i < offsetof(struct icmp_mib, dummy) / sizeof(unsigned long); i++)
seq_printf(seq, " %lu",
fold_field((void **) icmp_statistics, i));
seq_printf(seq, "\nTcp: RtoAlgorithm RtoMin RtoMax MaxConn ActiveOpens "
"PassiveOpens AttemptFails EstabResets CurrEstab "
"InSegs OutSegs RetransSegs InErrs OutRsts\nTcp:");
for (i = 0;
i < offsetof(struct tcp_mib, __pad) / sizeof(unsigned long); i++) {
if (i == (offsetof(struct tcp_mib, TcpMaxConn) / sizeof(unsigned long)))
/* MaxConn field is negative, RFC 2012 */
seq_printf(seq, " %ld",
fold_field((void **) tcp_statistics, i));
else
seq_printf(seq, " %lu",
fold_field((void **) tcp_statistics, i));
}
seq_printf(seq, "\nUdp: InDatagrams NoPorts InErrors OutDatagrams\n"
"Udp:");
for (i = 0;
i < offsetof(struct udp_mib, __pad) / sizeof(unsigned long); i++)
seq_printf(seq, " %lu",
fold_field((void **) udp_statistics, i));
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: 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++)
seq_printf(seq, " %lu",
fold_field((void **) net_statistics, i));
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;
}
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