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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 1.1.1.1 2004-04-15 02:34:21 phoenix 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

 */

/*

 * RFC 1213:  MIB-II

 * RFC 2011 (updates 1213):  SNMPv2-MIB-IP

 * RFC 2863:  Interfaces Group MIB

 */

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;

/*

 * RFC 2465:  IPv6 MIB: General Group

 */

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;

/*

 * RFC 1213:  MIB-II ICMP Group

 * RFC 2011 (updates 1213):  SNMPv2 MIB for IP: ICMP group

 */

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;

/*

 * RFC 2466:  ICMPv6-MIB

 */

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;

/*

 * RFC 1213:  MIB-II TCP group

 * RFC 2012 (updates 1213):  SNMPv2-MIB-TCP

 */

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;

/*

 * RFC 1213:  MIB-II UDP group

 * RFC 2013 (updates 1213):  SNMPv2-MIB-UDP

 */

struct udp_mib

{

        unsigned long   UdpInDatagrams;

        unsigned long   UdpNoPorts;

        unsigned long   UdpInErrors;

        unsigned long   UdpOutDatagrams;

        unsigned long   __pad[0];

} ____cacheline_aligned;

/* draft-ietf-sigtran-sctp-mib-07.txt */

struct sctp_mib

{

        unsigned long   SctpCurrEstab;

        unsigned long   SctpActiveEstabs;

        unsigned long   SctpPassiveEstabs;

        unsigned long   SctpAborteds;

        unsigned long   SctpShutdowns;

        unsigned long   SctpOutOfBlues;

        unsigned long   SctpChecksumErrors;

        unsigned long   SctpOutCtrlChunks;

        unsigned long   SctpOutOrderChunks;

        unsigned long   SctpOutUnorderChunks;

        unsigned long   SctpInCtrlChunks;

        unsigned long   SctpInOrderChunks;

        unsigned long   SctpInUnorderChunks;

        unsigned long   SctpFragUsrMsgs;

        unsigned long   SctpReasmUsrMsgs;

        unsigned long   SctpOutSCTPPacks;

        unsigned long   SctpInSCTPPacks;

        unsigned long   SctpRtoAlgorithm;

        unsigned long   SctpRtoMin;

        unsigned long   SctpRtoMax;

        unsigned long   SctpRtoInitial;

        unsigned long   SctpValCookieLife;

        unsigned long   SctpMaxInitRetr;

        unsigned long   __pad[0];

};

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++)

#define SNMP_ADD_STATS_BH(mib, field, addend)   \

        ((mib)[2*smp_processor_id()].field += addend)

#define SNMP_ADD_STATS_USER(mib, field, addend) \

        ((mib)[2*smp_processor_id()+1].field += addend)

#endif