net/mptcp/mib.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2
   3 #include <linux/seq_file.h>
   4 #include <net/ip.h>
   5 #include <net/mptcp.h>
   6 #include <net/snmp.h>
   7 #include <net/net_namespace.h>
   8
   9 #include "mib.h"
  10
  11 static const struct snmp_mib mptcp_snmp_list[] = {
  12         SNMP_MIB_ITEM("MPCapableSYNRX", MPTCP_MIB_MPCAPABLEPASSIVE),
  13         SNMP_MIB_ITEM("MPCapableSYNTX", MPTCP_MIB_MPCAPABLEACTIVE),
  14         SNMP_MIB_ITEM("MPCapableSYNACKRX", MPTCP_MIB_MPCAPABLEACTIVEACK),
  15         SNMP_MIB_ITEM("MPCapableACKRX", MPTCP_MIB_MPCAPABLEPASSIVEACK),
  16         SNMP_MIB_ITEM("MPCapableFallbackACK", MPTCP_MIB_MPCAPABLEPASSIVEFALLBACK),
  17         SNMP_MIB_ITEM("MPCapableFallbackSYNACK", MPTCP_MIB_MPCAPABLEACTIVEFALLBACK),
  18         SNMP_MIB_ITEM("MPCapableSYNTXDrop", MPTCP_MIB_MPCAPABLEACTIVEDROP),
  19         SNMP_MIB_ITEM("MPCapableSYNTXDisabled", MPTCP_MIB_MPCAPABLEACTIVEDISABLED),
  20         SNMP_MIB_ITEM("MPCapableEndpAttempt", MPTCP_MIB_MPCAPABLEENDPATTEMPT),
  21         SNMP_MIB_ITEM("MPFallbackTokenInit", MPTCP_MIB_TOKENFALLBACKINIT),
  22         SNMP_MIB_ITEM("MPTCPRetrans", MPTCP_MIB_RETRANSSEGS),
  23         SNMP_MIB_ITEM("MPJoinNoTokenFound", MPTCP_MIB_JOINNOTOKEN),
  24         SNMP_MIB_ITEM("MPJoinSynRx", MPTCP_MIB_JOINSYNRX),
  25         SNMP_MIB_ITEM("MPJoinSynBackupRx", MPTCP_MIB_JOINSYNBACKUPRX),
  26         SNMP_MIB_ITEM("MPJoinSynAckRx", MPTCP_MIB_JOINSYNACKRX),
  27         SNMP_MIB_ITEM("MPJoinSynAckBackupRx", MPTCP_MIB_JOINSYNACKBACKUPRX),
  28         SNMP_MIB_ITEM("MPJoinSynAckHMacFailure", MPTCP_MIB_JOINSYNACKMAC),
  29         SNMP_MIB_ITEM("MPJoinAckRx", MPTCP_MIB_JOINACKRX),
  30         SNMP_MIB_ITEM("MPJoinAckHMacFailure", MPTCP_MIB_JOINACKMAC),
  31         SNMP_MIB_ITEM("MPJoinSynTx", MPTCP_MIB_JOINSYNTX),
  32         SNMP_MIB_ITEM("MPJoinSynTxCreatSkErr", MPTCP_MIB_JOINSYNTXCREATSKERR),
  33         SNMP_MIB_ITEM("MPJoinSynTxBindErr", MPTCP_MIB_JOINSYNTXBINDERR),
  34         SNMP_MIB_ITEM("MPJoinSynTxConnectErr", MPTCP_MIB_JOINSYNTXCONNECTERR),
  35         SNMP_MIB_ITEM("DSSNotMatching", MPTCP_MIB_DSSNOMATCH),
  36         SNMP_MIB_ITEM("DSSCorruptionFallback", MPTCP_MIB_DSSCORRUPTIONFALLBACK),
  37         SNMP_MIB_ITEM("DSSCorruptionReset", MPTCP_MIB_DSSCORRUPTIONRESET),
  38         SNMP_MIB_ITEM("InfiniteMapTx", MPTCP_MIB_INFINITEMAPTX),
  39         SNMP_MIB_ITEM("InfiniteMapRx", MPTCP_MIB_INFINITEMAPRX),
  40         SNMP_MIB_ITEM("DSSNoMatchTCP", MPTCP_MIB_DSSTCPMISMATCH),
  41         SNMP_MIB_ITEM("DataCsumErr", MPTCP_MIB_DATACSUMERR),
  42         SNMP_MIB_ITEM("OFOQueueTail", MPTCP_MIB_OFOQUEUETAIL),
  43         SNMP_MIB_ITEM("OFOQueue", MPTCP_MIB_OFOQUEUE),
  44         SNMP_MIB_ITEM("OFOMerge", MPTCP_MIB_OFOMERGE),
  45         SNMP_MIB_ITEM("NoDSSInWindow", MPTCP_MIB_NODSSWINDOW),
  46         SNMP_MIB_ITEM("DuplicateData", MPTCP_MIB_DUPDATA),
  47         SNMP_MIB_ITEM("AddAddr", MPTCP_MIB_ADDADDR),
  48         SNMP_MIB_ITEM("AddAddrTx", MPTCP_MIB_ADDADDRTX),
  49         SNMP_MIB_ITEM("AddAddrTxDrop", MPTCP_MIB_ADDADDRTXDROP),
  50         SNMP_MIB_ITEM("EchoAdd", MPTCP_MIB_ECHOADD),
  51         SNMP_MIB_ITEM("EchoAddTx", MPTCP_MIB_ECHOADDTX),
  52         SNMP_MIB_ITEM("EchoAddTxDrop", MPTCP_MIB_ECHOADDTXDROP),
  53         SNMP_MIB_ITEM("PortAdd", MPTCP_MIB_PORTADD),
  54         SNMP_MIB_ITEM("AddAddrDrop", MPTCP_MIB_ADDADDRDROP),
  55         SNMP_MIB_ITEM("MPJoinPortSynRx", MPTCP_MIB_JOINPORTSYNRX),
  56         SNMP_MIB_ITEM("MPJoinPortSynAckRx", MPTCP_MIB_JOINPORTSYNACKRX),
  57         SNMP_MIB_ITEM("MPJoinPortAckRx", MPTCP_MIB_JOINPORTACKRX),
  58         SNMP_MIB_ITEM("MismatchPortSynRx", MPTCP_MIB_MISMATCHPORTSYNRX),
  59         SNMP_MIB_ITEM("MismatchPortAckRx", MPTCP_MIB_MISMATCHPORTACKRX),
  60         SNMP_MIB_ITEM("RmAddr", MPTCP_MIB_RMADDR),
  61         SNMP_MIB_ITEM("RmAddrDrop", MPTCP_MIB_RMADDRDROP),
  62         SNMP_MIB_ITEM("RmAddrTx", MPTCP_MIB_RMADDRTX),
  63         SNMP_MIB_ITEM("RmAddrTxDrop", MPTCP_MIB_RMADDRTXDROP),
  64         SNMP_MIB_ITEM("RmSubflow", MPTCP_MIB_RMSUBFLOW),
  65         SNMP_MIB_ITEM("MPPrioTx", MPTCP_MIB_MPPRIOTX),
  66         SNMP_MIB_ITEM("MPPrioRx", MPTCP_MIB_MPPRIORX),
  67         SNMP_MIB_ITEM("MPFailTx", MPTCP_MIB_MPFAILTX),
  68         SNMP_MIB_ITEM("MPFailRx", MPTCP_MIB_MPFAILRX),
  69         SNMP_MIB_ITEM("MPFastcloseTx", MPTCP_MIB_MPFASTCLOSETX),
  70         SNMP_MIB_ITEM("MPFastcloseRx", MPTCP_MIB_MPFASTCLOSERX),
  71         SNMP_MIB_ITEM("MPRstTx", MPTCP_MIB_MPRSTTX),
  72         SNMP_MIB_ITEM("MPRstRx", MPTCP_MIB_MPRSTRX),
  73         SNMP_MIB_ITEM("RcvPruned", MPTCP_MIB_RCVPRUNED),
  74         SNMP_MIB_ITEM("SubflowStale", MPTCP_MIB_SUBFLOWSTALE),
  75         SNMP_MIB_ITEM("SubflowRecover", MPTCP_MIB_SUBFLOWRECOVER),
  76         SNMP_MIB_ITEM("SndWndShared", MPTCP_MIB_SNDWNDSHARED),
  77         SNMP_MIB_ITEM("RcvWndShared", MPTCP_MIB_RCVWNDSHARED),
  78         SNMP_MIB_ITEM("RcvWndConflictUpdate", MPTCP_MIB_RCVWNDCONFLICTUPDATE),
  79         SNMP_MIB_ITEM("RcvWndConflict", MPTCP_MIB_RCVWNDCONFLICT),
  80         SNMP_MIB_ITEM("MPCurrEstab", MPTCP_MIB_CURRESTAB),
  81         SNMP_MIB_ITEM("Blackhole", MPTCP_MIB_BLACKHOLE),
  82         SNMP_MIB_SENTINEL
  83 };
  84
  85 /* mptcp_mib_alloc - allocate percpu mib counters
  86  *
  87  * These are allocated when the first mptcp socket is created so
  88  * we do not waste percpu memory if mptcp isn't in use.
  89  */
  90 bool mptcp_mib_alloc(struct net *net)
  91 {
  92         struct mptcp_mib __percpu *mib = alloc_percpu(struct mptcp_mib);
  93
  94         if (!mib)
  95                 return false;
  96
  97         if (cmpxchg(&net->mib.mptcp_statistics, NULL, mib))
  98                 free_percpu(mib);
  99
 100         return true;
 101 }
 102
 103 void mptcp_seq_show(struct seq_file *seq)
 104 {
 105         unsigned long sum[ARRAY_SIZE(mptcp_snmp_list) - 1];
 106         struct net *net = seq->private;
 107         int i;
 108
 109         seq_puts(seq, "MPTcpExt:");
 110         for (i = 0; mptcp_snmp_list[i].name; i++)
 111                 seq_printf(seq, " %s", mptcp_snmp_list[i].name);
 112
 113         seq_puts(seq, "\nMPTcpExt:");
 114
 115         memset(sum, 0, sizeof(sum));
 116         if (net->mib.mptcp_statistics)
 117                 snmp_get_cpu_field_batch(sum, mptcp_snmp_list,
 118                                          net->mib.mptcp_statistics);
 119
 120         for (i = 0; mptcp_snmp_list[i].name; i++)
 121                 seq_printf(seq, " %lu", sum[i]);
 122
 123         seq_putc(seq, '\n');
 124 }