mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
ad2b9b0f8d
Currently, we use length of DSACKed range to compute number of delivered packets. And if sequence range in DSACK is corrupted, we can get bogus dsacked/acked count, and bogus cwnd. This patch put bounds on DSACKed range to skip update of data delivery and spurious retransmission information, if the DSACK is unlikely caused by sender's action: - DSACKed range shouldn't be greater than maximum advertised rwnd. - Total no. of DSACKed segments shouldn't be greater than total no. of retransmitted segs. Unlike spurious retransmits, network duplicates or corrupted DSACKs shouldn't be counted as delivery. Signed-off-by: Priyaranjan Jha <priyarjha@google.com> Signed-off-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
532 lines
20 KiB
C
532 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* This file implements the various access functions for the
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* PROC file system. It is mainly used for debugging and
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* statistics.
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*
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* Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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* Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
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* Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
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* Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de>
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*
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* Fixes:
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* Alan Cox : UDP sockets show the rxqueue/txqueue
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* using hint flag for the netinfo.
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* Pauline Middelink : identd support
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* Alan Cox : Make /proc safer.
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* Erik Schoenfelder : /proc/net/snmp
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* Alan Cox : Handle dead sockets properly.
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* Gerhard Koerting : Show both timers
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* Alan Cox : Allow inode to be NULL (kernel socket)
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* Andi Kleen : Add support for open_requests and
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* split functions for more readibility.
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* Andi Kleen : Add support for /proc/net/netstat
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* Arnaldo C. Melo : Convert to seq_file
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*/
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#include <linux/types.h>
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#include <net/net_namespace.h>
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#include <net/icmp.h>
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#include <net/protocol.h>
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#include <net/tcp.h>
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#include <net/mptcp.h>
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#include <net/udp.h>
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#include <net/udplite.h>
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#include <linux/bottom_half.h>
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#include <linux/inetdevice.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/export.h>
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#include <net/sock.h>
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#include <net/raw.h>
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#define TCPUDP_MIB_MAX max_t(u32, UDP_MIB_MAX, TCP_MIB_MAX)
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/*
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* Report socket allocation statistics [mea@utu.fi]
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*/
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static int sockstat_seq_show(struct seq_file *seq, void *v)
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{
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struct net *net = seq->private;
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int orphans, sockets;
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orphans = percpu_counter_sum_positive(&tcp_orphan_count);
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sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
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socket_seq_show(seq);
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seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
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sock_prot_inuse_get(net, &tcp_prot), orphans,
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atomic_read(&net->ipv4.tcp_death_row.tw_count), sockets,
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proto_memory_allocated(&tcp_prot));
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seq_printf(seq, "UDP: inuse %d mem %ld\n",
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sock_prot_inuse_get(net, &udp_prot),
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proto_memory_allocated(&udp_prot));
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seq_printf(seq, "UDPLITE: inuse %d\n",
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sock_prot_inuse_get(net, &udplite_prot));
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seq_printf(seq, "RAW: inuse %d\n",
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sock_prot_inuse_get(net, &raw_prot));
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seq_printf(seq, "FRAG: inuse %u memory %lu\n",
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atomic_read(&net->ipv4.fqdir->rhashtable.nelems),
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frag_mem_limit(net->ipv4.fqdir));
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return 0;
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}
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/* snmp items */
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static const struct snmp_mib snmp4_ipstats_list[] = {
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SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
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SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
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SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
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SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
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SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
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SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
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SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
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SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
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SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
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SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
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SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
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SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
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SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
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SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
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SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
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SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
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SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
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SNMP_MIB_SENTINEL
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};
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/* Following items are displayed in /proc/net/netstat */
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static const struct snmp_mib snmp4_ipextstats_list[] = {
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SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
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SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
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SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
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SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
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SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
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SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
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SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
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SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
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SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
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SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
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SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
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SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
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/* Non RFC4293 fields */
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SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
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SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
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SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
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SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
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SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS),
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SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS),
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SNMP_MIB_SENTINEL
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};
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static const struct {
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const char *name;
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int index;
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} icmpmibmap[] = {
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{ "DestUnreachs", ICMP_DEST_UNREACH },
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{ "TimeExcds", ICMP_TIME_EXCEEDED },
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{ "ParmProbs", ICMP_PARAMETERPROB },
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{ "SrcQuenchs", ICMP_SOURCE_QUENCH },
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{ "Redirects", ICMP_REDIRECT },
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{ "Echos", ICMP_ECHO },
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{ "EchoReps", ICMP_ECHOREPLY },
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{ "Timestamps", ICMP_TIMESTAMP },
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{ "TimestampReps", ICMP_TIMESTAMPREPLY },
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{ "AddrMasks", ICMP_ADDRESS },
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{ "AddrMaskReps", ICMP_ADDRESSREPLY },
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{ NULL, 0 }
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};
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static const struct snmp_mib snmp4_tcp_list[] = {
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SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
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SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
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SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
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SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
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SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
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SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
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SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
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SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
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SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
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SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
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SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
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SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
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SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
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SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
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SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
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SNMP_MIB_SENTINEL
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};
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static const struct snmp_mib snmp4_udp_list[] = {
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SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
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SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
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SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
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SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
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SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
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SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
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SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
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SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
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SNMP_MIB_SENTINEL
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};
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static const struct snmp_mib snmp4_net_list[] = {
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SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
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SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
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SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
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SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
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SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
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SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
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SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
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SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
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SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
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SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
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SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
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SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
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SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
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SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
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SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
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SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
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SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
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SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
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SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
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SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
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SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
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SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
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SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
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SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
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SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
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SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
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SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
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SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
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SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
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SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
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SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
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SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
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SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
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SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
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SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
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SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
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SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
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SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
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SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
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SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
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SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
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SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
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SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
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SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
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SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
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SNMP_MIB_ITEM("TCPBacklogCoalesce", LINUX_MIB_TCPBACKLOGCOALESCE),
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SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
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SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
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SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
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SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
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SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
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SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
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SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
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SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
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SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
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SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
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SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
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SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO),
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SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
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SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
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SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
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SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
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SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
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SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
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SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE),
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SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
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SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
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SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
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SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
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SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP),
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SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
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SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
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SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
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SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
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SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
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SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
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SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
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SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
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SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
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SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
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SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
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SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
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SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
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SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
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SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
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SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
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SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
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SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
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SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
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SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE),
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SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
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SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
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SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
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SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
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SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
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SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
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SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
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SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
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SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT),
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SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND),
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SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT),
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SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND),
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SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV),
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SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS),
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SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ),
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SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2),
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SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT),
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SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE),
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SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
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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_ITEM("TCPWqueueTooBig", LINUX_MIB_TCPWQUEUETOOBIG),
|
|
SNMP_MIB_ITEM("TCPFastOpenPassiveAltKey", LINUX_MIB_TCPFASTOPENPASSIVEALTKEY),
|
|
SNMP_MIB_ITEM("TcpTimeoutRehash", LINUX_MIB_TCPTIMEOUTREHASH),
|
|
SNMP_MIB_ITEM("TcpDuplicateDataRehash", LINUX_MIB_TCPDUPLICATEDATAREHASH),
|
|
SNMP_MIB_ITEM("TCPDSACKRecvSegs", LINUX_MIB_TCPDSACKRECVSEGS),
|
|
SNMP_MIB_ITEM("TCPDSACKIgnoredDubious", LINUX_MIB_TCPDSACKIGNOREDDUBIOUS),
|
|
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');
|
|
mptcp_seq_show(seq);
|
|
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);
|
|
}
|