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linux-stable/net/ipv4/proc.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

524 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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.
*
* 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
*/
#include <linux/types.h>
#include <net/net_namespace.h>
#include <net/icmp.h>
#include <net/protocol.h>
#include <net/tcp.h>
#include <net/udp.h>
#include <net/udplite.h>
#include <linux/bottom_half.h>
#include <linux/inetdevice.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/export.h>
#include <net/sock.h>
#include <net/raw.h>
#define TCPUDP_MIB_MAX max_t(u32, UDP_MIB_MAX, TCP_MIB_MAX)
/*
* Report socket allocation statistics [mea@utu.fi]
*/
static int sockstat_seq_show(struct seq_file *seq, void *v)
{
struct net *net = seq->private;
int orphans, sockets;
orphans = percpu_counter_sum_positive(&tcp_orphan_count);
sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
socket_seq_show(seq);
seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
sock_prot_inuse_get(net, &tcp_prot), orphans,
atomic_read(&net->ipv4.tcp_death_row.tw_count), sockets,
proto_memory_allocated(&tcp_prot));
seq_printf(seq, "UDP: inuse %d mem %ld\n",
sock_prot_inuse_get(net, &udp_prot),
proto_memory_allocated(&udp_prot));
seq_printf(seq, "UDPLITE: inuse %d\n",
sock_prot_inuse_get(net, &udplite_prot));
seq_printf(seq, "RAW: inuse %d\n",
sock_prot_inuse_get(net, &raw_prot));
seq_printf(seq, "FRAG: inuse %u memory %lu\n",
atomic_read(&net->ipv4.frags.rhashtable.nelems),
frag_mem_limit(&net->ipv4.frags));
return 0;
}
/* snmp items */
static const struct snmp_mib snmp4_ipstats_list[] = {
SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
SNMP_MIB_SENTINEL
};
/* Following items are displayed in /proc/net/netstat */
static const struct snmp_mib snmp4_ipextstats_list[] = {
SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
/* Non RFC4293 fields */
SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS),
SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS),
SNMP_MIB_SENTINEL
};
static const struct {
const char *name;
int index;
} icmpmibmap[] = {
{ "DestUnreachs", ICMP_DEST_UNREACH },
{ "TimeExcds", ICMP_TIME_EXCEEDED },
{ "ParmProbs", ICMP_PARAMETERPROB },
{ "SrcQuenchs", ICMP_SOURCE_QUENCH },
{ "Redirects", ICMP_REDIRECT },
{ "Echos", ICMP_ECHO },
{ "EchoReps", ICMP_ECHOREPLY },
{ "Timestamps", ICMP_TIMESTAMP },
{ "TimestampReps", ICMP_TIMESTAMPREPLY },
{ "AddrMasks", ICMP_ADDRESS },
{ "AddrMaskReps", ICMP_ADDRESSREPLY },
{ NULL, 0 }
};
static const struct snmp_mib snmp4_tcp_list[] = {
SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
SNMP_MIB_SENTINEL
};
static const struct snmp_mib snmp4_udp_list[] = {
SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
SNMP_MIB_SENTINEL
};
static const struct snmp_mib snmp4_net_list[] = {
SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
SNMP_MIB_ITEM("TCPBacklogCoalesce", LINUX_MIB_TCPBACKLOGCOALESCE),
SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO),
SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE),
SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP),
SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE),
SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT),
SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND),
SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT),
SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND),
SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV),
SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS),
SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ),
SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2),
SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT),
SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE),
SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED),
SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE),
SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED),
SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP),
SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP),
SNMP_MIB_SENTINEL
};
static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
unsigned short *type, int count)
{
int j;
if (count) {
seq_puts(seq, "\nIcmpMsg:");
for (j = 0; j < count; ++j)
seq_printf(seq, " %sType%u",
type[j] & 0x100 ? "Out" : "In",
type[j] & 0xff);
seq_puts(seq, "\nIcmpMsg:");
for (j = 0; j < count; ++j)
seq_printf(seq, " %lu", vals[j]);
}
}
static void icmpmsg_put(struct seq_file *seq)
{
#define PERLINE 16
int i, count;
unsigned short type[PERLINE];
unsigned long vals[PERLINE], val;
struct net *net = seq->private;
count = 0;
for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
if (val) {
type[count] = i;
vals[count++] = val;
}
if (count == PERLINE) {
icmpmsg_put_line(seq, vals, type, count);
count = 0;
}
}
icmpmsg_put_line(seq, vals, type, count);
#undef PERLINE
}
static void icmp_put(struct seq_file *seq)
{
int i;
struct net *net = seq->private;
atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
for (i = 0; icmpmibmap[i].name; i++)
seq_printf(seq, " In%s", icmpmibmap[i].name);
seq_puts(seq, " OutMsgs OutErrors");
for (i = 0; icmpmibmap[i].name; i++)
seq_printf(seq, " Out%s", icmpmibmap[i].name);
seq_printf(seq, "\nIcmp: %lu %lu %lu",
snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
for (i = 0; icmpmibmap[i].name; i++)
seq_printf(seq, " %lu",
atomic_long_read(ptr + icmpmibmap[i].index));
seq_printf(seq, " %lu %lu",
snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
for (i = 0; icmpmibmap[i].name; i++)
seq_printf(seq, " %lu",
atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
}
/*
* Called from the PROCfs module. This outputs /proc/net/snmp.
*/
static int snmp_seq_show_ipstats(struct seq_file *seq, void *v)
{
struct net *net = seq->private;
u64 buff64[IPSTATS_MIB_MAX];
int i;
memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64));
seq_puts(seq, "Ip: Forwarding DefaultTTL");
for (i = 0; snmp4_ipstats_list[i].name; i++)
seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
seq_printf(seq, "\nIp: %d %d",
IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
net->ipv4.sysctl_ip_default_ttl);
BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list,
net->mib.ip_statistics,
offsetof(struct ipstats_mib, syncp));
for (i = 0; snmp4_ipstats_list[i].name; i++)
seq_printf(seq, " %llu", buff64[i]);
return 0;
}
static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v)
{
unsigned long buff[TCPUDP_MIB_MAX];
struct net *net = seq->private;
int i;
memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
seq_puts(seq, "\nTcp:");
for (i = 0; snmp4_tcp_list[i].name; i++)
seq_printf(seq, " %s", snmp4_tcp_list[i].name);
seq_puts(seq, "\nTcp:");
snmp_get_cpu_field_batch(buff, snmp4_tcp_list,
net->mib.tcp_statistics);
for (i = 0; snmp4_tcp_list[i].name; i++) {
/* MaxConn field is signed, RFC 2012 */
if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
seq_printf(seq, " %ld", buff[i]);
else
seq_printf(seq, " %lu", buff[i]);
}
memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
snmp_get_cpu_field_batch(buff, snmp4_udp_list,
net->mib.udp_statistics);
seq_puts(seq, "\nUdp:");
for (i = 0; snmp4_udp_list[i].name; i++)
seq_printf(seq, " %s", snmp4_udp_list[i].name);
seq_puts(seq, "\nUdp:");
for (i = 0; snmp4_udp_list[i].name; i++)
seq_printf(seq, " %lu", buff[i]);
memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
/* the UDP and UDP-Lite MIBs are the same */
seq_puts(seq, "\nUdpLite:");
snmp_get_cpu_field_batch(buff, snmp4_udp_list,
net->mib.udplite_statistics);
for (i = 0; snmp4_udp_list[i].name; i++)
seq_printf(seq, " %s", snmp4_udp_list[i].name);
seq_puts(seq, "\nUdpLite:");
for (i = 0; snmp4_udp_list[i].name; i++)
seq_printf(seq, " %lu", buff[i]);
seq_putc(seq, '\n');
return 0;
}
static int snmp_seq_show(struct seq_file *seq, void *v)
{
snmp_seq_show_ipstats(seq, v);
icmp_put(seq); /* RFC 2011 compatibility */
icmpmsg_put(seq);
snmp_seq_show_tcp_udp(seq, v);
return 0;
}
/*
* Output /proc/net/netstat
*/
static int netstat_seq_show(struct seq_file *seq, void *v)
{
int i;
struct net *net = seq->private;
seq_puts(seq, "TcpExt:");
for (i = 0; snmp4_net_list[i].name; i++)
seq_printf(seq, " %s", snmp4_net_list[i].name);
seq_puts(seq, "\nTcpExt:");
for (i = 0; snmp4_net_list[i].name; i++)
seq_printf(seq, " %lu",
snmp_fold_field(net->mib.net_statistics,
snmp4_net_list[i].entry));
seq_puts(seq, "\nIpExt:");
for (i = 0; snmp4_ipextstats_list[i].name; i++)
seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
seq_puts(seq, "\nIpExt:");
for (i = 0; snmp4_ipextstats_list[i].name; i++)
seq_printf(seq, " %llu",
snmp_fold_field64(net->mib.ip_statistics,
snmp4_ipextstats_list[i].entry,
offsetof(struct ipstats_mib, syncp)));
seq_putc(seq, '\n');
return 0;
}
static __net_init int ip_proc_init_net(struct net *net)
{
if (!proc_create_net_single("sockstat", 0444, net->proc_net,
sockstat_seq_show, NULL))
goto out_sockstat;
if (!proc_create_net_single("netstat", 0444, net->proc_net,
netstat_seq_show, NULL))
goto out_netstat;
if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show,
NULL))
goto out_snmp;
return 0;
out_snmp:
remove_proc_entry("netstat", net->proc_net);
out_netstat:
remove_proc_entry("sockstat", net->proc_net);
out_sockstat:
return -ENOMEM;
}
static __net_exit void ip_proc_exit_net(struct net *net)
{
remove_proc_entry("snmp", net->proc_net);
remove_proc_entry("netstat", net->proc_net);
remove_proc_entry("sockstat", net->proc_net);
}
static __net_initdata struct pernet_operations ip_proc_ops = {
.init = ip_proc_init_net,
.exit = ip_proc_exit_net,
};
int __init ip_misc_proc_init(void)
{
return register_pernet_subsys(&ip_proc_ops);
}
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