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/*
*
* SNMP MIB entries for the IP subsystem.
*
* Alan Cox <gw4pts@gw4pts.ampr.org>
*
* We don't chose to implement SNMP in the kernel (this would
* be silly as SNMP is a pain in the backside in places). We do
* however need to collect the MIB statistics and export them
* out of /proc (eventually)
*
* 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.
*
* $Id: snmp.h,v 1.19 2001/06/14 13:40:46 davem Exp $
*
*/
#ifndef _SNMP_H
#define _SNMP_H
#include <linux/cache.h>
/*
* We use all unsigned longs. Linux will soon be so reliable that even these
* will rapidly get too small 8-). Seriously consider the IpInReceives count
* on the 20Gb/s + networks people expect in a few years time!
*/
/*
* The rule for padding:
* Best is power of two because then the right structure can be found by a simple
* shift. The structure should be always cache line aligned.
* gcc needs n=alignto(cachelinesize, popcnt(sizeof(bla_mib))) shift/add instructions
* to emulate multiply in case it is not power-of-two. Currently n is always <=3 for
* all sizes so simple cache line alignment is enough.
*
* The best solution would be a global CPU local area , especially on 64 and 128byte
* cacheline machine it makes a *lot* of sense -AK
*/
struct ip_mib
{
unsigned long IpInReceives;
unsigned long IpInHdrErrors;
unsigned long IpInAddrErrors;
unsigned long IpForwDatagrams;
unsigned long IpInUnknownProtos;
unsigned long IpInDiscards;
unsigned long IpInDelivers;
unsigned long IpOutRequests;
unsigned long IpOutDiscards;
unsigned long IpOutNoRoutes;
unsigned long IpReasmTimeout;
unsigned long IpReasmReqds;
unsigned long IpReasmOKs;
unsigned long IpReasmFails;
unsigned long IpFragOKs;
unsigned long IpFragFails;
unsigned long IpFragCreates;
unsigned long __pad[0];
} ____cacheline_aligned;
struct ipv6_mib
{
unsigned long Ip6InReceives;
unsigned long Ip6InHdrErrors;
unsigned long Ip6InTooBigErrors;
unsigned long Ip6InNoRoutes;
unsigned long Ip6InAddrErrors;
unsigned long Ip6InUnknownProtos;
unsigned long Ip6InTruncatedPkts;
unsigned long Ip6InDiscards;
unsigned long Ip6InDelivers;
unsigned long Ip6OutForwDatagrams;
unsigned long Ip6OutRequests;
unsigned long Ip6OutDiscards;
unsigned long Ip6OutNoRoutes;
unsigned long Ip6ReasmTimeout;
unsigned long Ip6ReasmReqds;
unsigned long Ip6ReasmOKs;
unsigned long Ip6ReasmFails;
unsigned long Ip6FragOKs;
unsigned long Ip6FragFails;
unsigned long Ip6FragCreates;
unsigned long Ip6InMcastPkts;
unsigned long Ip6OutMcastPkts;
unsigned long __pad[0];
} ____cacheline_aligned;
struct icmp_mib
{
unsigned long IcmpInMsgs;
unsigned long IcmpInErrors;
unsigned long IcmpInDestUnreachs;
unsigned long IcmpInTimeExcds;
unsigned long IcmpInParmProbs;
unsigned long IcmpInSrcQuenchs;
unsigned long IcmpInRedirects;
unsigned long IcmpInEchos;
unsigned long IcmpInEchoReps;
unsigned long IcmpInTimestamps;
unsigned long IcmpInTimestampReps;
unsigned long IcmpInAddrMasks;
unsigned long IcmpInAddrMaskReps;
unsigned long IcmpOutMsgs;
unsigned long IcmpOutErrors;
unsigned long IcmpOutDestUnreachs;
unsigned long IcmpOutTimeExcds;
unsigned long IcmpOutParmProbs;
unsigned long IcmpOutSrcQuenchs;
unsigned long IcmpOutRedirects;
unsigned long IcmpOutEchos;
unsigned long IcmpOutEchoReps;
unsigned long IcmpOutTimestamps;
unsigned long IcmpOutTimestampReps;
unsigned long IcmpOutAddrMasks;
unsigned long IcmpOutAddrMaskReps;
unsigned long dummy;
unsigned long __pad[0];
} ____cacheline_aligned;
struct icmpv6_mib
{
unsigned long Icmp6InMsgs;
unsigned long Icmp6InErrors;
unsigned long Icmp6InDestUnreachs;
unsigned long Icmp6InPktTooBigs;
unsigned long Icmp6InTimeExcds;
unsigned long Icmp6InParmProblems;
unsigned long Icmp6InEchos;
unsigned long Icmp6InEchoReplies;
unsigned long Icmp6InGroupMembQueries;
unsigned long Icmp6InGroupMembResponses;
unsigned long Icmp6InGroupMembReductions;
unsigned long Icmp6InRouterSolicits;
unsigned long Icmp6InRouterAdvertisements;
unsigned long Icmp6InNeighborSolicits;
unsigned long Icmp6InNeighborAdvertisements;
unsigned long Icmp6InRedirects;
unsigned long Icmp6OutMsgs;
unsigned long Icmp6OutDestUnreachs;
unsigned long Icmp6OutPktTooBigs;
unsigned long Icmp6OutTimeExcds;
unsigned long Icmp6OutParmProblems;
unsigned long Icmp6OutEchoReplies;
unsigned long Icmp6OutRouterSolicits;
unsigned long Icmp6OutNeighborSolicits;
unsigned long Icmp6OutNeighborAdvertisements;
unsigned long Icmp6OutRedirects;
unsigned long Icmp6OutGroupMembResponses;
unsigned long Icmp6OutGroupMembReductions;
unsigned long __pad[0];
} ____cacheline_aligned;
struct tcp_mib
{
unsigned long TcpRtoAlgorithm;
unsigned long TcpRtoMin;
unsigned long TcpRtoMax;
unsigned long TcpMaxConn;
unsigned long TcpActiveOpens;
unsigned long TcpPassiveOpens;
unsigned long TcpAttemptFails;
unsigned long TcpEstabResets;
unsigned long TcpCurrEstab;
unsigned long TcpInSegs;
unsigned long TcpOutSegs;
unsigned long TcpRetransSegs;
unsigned long TcpInErrs;
unsigned long TcpOutRsts;
unsigned long __pad[0];
} ____cacheline_aligned;
struct udp_mib
{
unsigned long UdpInDatagrams;
unsigned long UdpNoPorts;
unsigned long UdpInErrors;
unsigned long UdpOutDatagrams;
unsigned long __pad[0];
} ____cacheline_aligned;
struct linux_mib
{
unsigned long SyncookiesSent;
unsigned long SyncookiesRecv;
unsigned long SyncookiesFailed;
unsigned long EmbryonicRsts;
unsigned long PruneCalled;
unsigned long RcvPruned;
unsigned long OfoPruned;
unsigned long OutOfWindowIcmps;
unsigned long LockDroppedIcmps;
unsigned long ArpFilter;
unsigned long TimeWaited;
unsigned long TimeWaitRecycled;
unsigned long TimeWaitKilled;
unsigned long PAWSPassiveRejected;
unsigned long PAWSActiveRejected;
unsigned long PAWSEstabRejected;
unsigned long DelayedACKs;
unsigned long DelayedACKLocked;
unsigned long DelayedACKLost;
unsigned long ListenOverflows;
unsigned long ListenDrops;
unsigned long TCPPrequeued;
unsigned long TCPDirectCopyFromBacklog;
unsigned long TCPDirectCopyFromPrequeue;
unsigned long TCPPrequeueDropped;
unsigned long TCPHPHits;
unsigned long TCPHPHitsToUser;
unsigned long TCPPureAcks;
unsigned long TCPHPAcks;
unsigned long TCPRenoRecovery;
unsigned long TCPSackRecovery;
unsigned long TCPSACKReneging;
unsigned long TCPFACKReorder;
unsigned long TCPSACKReorder;
unsigned long TCPRenoReorder;
unsigned long TCPTSReorder;
unsigned long TCPFullUndo;
unsigned long TCPPartialUndo;
unsigned long TCPDSACKUndo;
unsigned long TCPLossUndo;
unsigned long TCPLoss;
unsigned long TCPLostRetransmit;
unsigned long TCPRenoFailures;
unsigned long TCPSackFailures;
unsigned long TCPLossFailures;
unsigned long TCPFastRetrans;
unsigned long TCPForwardRetrans;
unsigned long TCPSlowStartRetrans;
unsigned long TCPTimeouts;
unsigned long TCPRenoRecoveryFail;
unsigned long TCPSackRecoveryFail;
unsigned long TCPSchedulerFailed;
unsigned long TCPRcvCollapsed;
unsigned long TCPDSACKOldSent;
unsigned long TCPDSACKOfoSent;
unsigned long TCPDSACKRecv;
unsigned long TCPDSACKOfoRecv;
unsigned long TCPAbortOnSyn;
unsigned long TCPAbortOnData;
unsigned long TCPAbortOnClose;
unsigned long TCPAbortOnMemory;
unsigned long TCPAbortOnTimeout;
unsigned long TCPAbortOnLinger;
unsigned long TCPAbortFailed;
unsigned long TCPMemoryPressures;
unsigned long __pad[0];
} ____cacheline_aligned;
/*
* FIXME: On x86 and some other CPUs the split into user and softirq parts is not needed because
* addl $1,memory is atomic against interrupts (but atomic_inc would be overkill because of the lock
* cycles). Wants new nonlocked_atomic_inc() primitives -AK
*/
#define SNMP_INC_STATS(mib, field) ((mib)[2*smp_processor_id()+!in_softirq()].field++)
#define SNMP_INC_STATS_BH(mib, field) ((mib)[2*smp_processor_id()].field++)
#define SNMP_INC_STATS_USER(mib, field) ((mib)[2*smp_processor_id()+1].field++)
#endif
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