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
11static 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("MPJoinRejected", MPTCP_MIB_JOINREJECTED),
32 SNMP_MIB_ITEM("MPJoinSynTx", MPTCP_MIB_JOINSYNTX),
33 SNMP_MIB_ITEM("MPJoinSynTxCreatSkErr", MPTCP_MIB_JOINSYNTXCREATSKERR),
34 SNMP_MIB_ITEM("MPJoinSynTxBindErr", MPTCP_MIB_JOINSYNTXBINDERR),
35 SNMP_MIB_ITEM("MPJoinSynTxConnectErr", MPTCP_MIB_JOINSYNTXCONNECTERR),
36 SNMP_MIB_ITEM("DSSNotMatching", MPTCP_MIB_DSSNOMATCH),
37 SNMP_MIB_ITEM("DSSCorruptionFallback", MPTCP_MIB_DSSCORRUPTIONFALLBACK),
38 SNMP_MIB_ITEM("DSSCorruptionReset", MPTCP_MIB_DSSCORRUPTIONRESET),
39 SNMP_MIB_ITEM("InfiniteMapTx", MPTCP_MIB_INFINITEMAPTX),
40 SNMP_MIB_ITEM("InfiniteMapRx", MPTCP_MIB_INFINITEMAPRX),
41 SNMP_MIB_ITEM("DSSNoMatchTCP", MPTCP_MIB_DSSTCPMISMATCH),
42 SNMP_MIB_ITEM("DataCsumErr", MPTCP_MIB_DATACSUMERR),
43 SNMP_MIB_ITEM("OFOQueueTail", MPTCP_MIB_OFOQUEUETAIL),
44 SNMP_MIB_ITEM("OFOQueue", MPTCP_MIB_OFOQUEUE),
45 SNMP_MIB_ITEM("OFOMerge", MPTCP_MIB_OFOMERGE),
46 SNMP_MIB_ITEM("NoDSSInWindow", MPTCP_MIB_NODSSWINDOW),
47 SNMP_MIB_ITEM("DuplicateData", MPTCP_MIB_DUPDATA),
48 SNMP_MIB_ITEM("AddAddr", MPTCP_MIB_ADDADDR),
49 SNMP_MIB_ITEM("AddAddrTx", MPTCP_MIB_ADDADDRTX),
50 SNMP_MIB_ITEM("AddAddrTxDrop", MPTCP_MIB_ADDADDRTXDROP),
51 SNMP_MIB_ITEM("EchoAdd", MPTCP_MIB_ECHOADD),
52 SNMP_MIB_ITEM("EchoAddTx", MPTCP_MIB_ECHOADDTX),
53 SNMP_MIB_ITEM("EchoAddTxDrop", MPTCP_MIB_ECHOADDTXDROP),
54 SNMP_MIB_ITEM("PortAdd", MPTCP_MIB_PORTADD),
55 SNMP_MIB_ITEM("AddAddrDrop", MPTCP_MIB_ADDADDRDROP),
56 SNMP_MIB_ITEM("MPJoinPortSynRx", MPTCP_MIB_JOINPORTSYNRX),
57 SNMP_MIB_ITEM("MPJoinPortSynAckRx", MPTCP_MIB_JOINPORTSYNACKRX),
58 SNMP_MIB_ITEM("MPJoinPortAckRx", MPTCP_MIB_JOINPORTACKRX),
59 SNMP_MIB_ITEM("MismatchPortSynRx", MPTCP_MIB_MISMATCHPORTSYNRX),
60 SNMP_MIB_ITEM("MismatchPortAckRx", MPTCP_MIB_MISMATCHPORTACKRX),
61 SNMP_MIB_ITEM("RmAddr", MPTCP_MIB_RMADDR),
62 SNMP_MIB_ITEM("RmAddrDrop", MPTCP_MIB_RMADDRDROP),
63 SNMP_MIB_ITEM("RmAddrTx", MPTCP_MIB_RMADDRTX),
64 SNMP_MIB_ITEM("RmAddrTxDrop", MPTCP_MIB_RMADDRTXDROP),
65 SNMP_MIB_ITEM("RmSubflow", MPTCP_MIB_RMSUBFLOW),
66 SNMP_MIB_ITEM("MPPrioTx", MPTCP_MIB_MPPRIOTX),
67 SNMP_MIB_ITEM("MPPrioRx", MPTCP_MIB_MPPRIORX),
68 SNMP_MIB_ITEM("MPFailTx", MPTCP_MIB_MPFAILTX),
69 SNMP_MIB_ITEM("MPFailRx", MPTCP_MIB_MPFAILRX),
70 SNMP_MIB_ITEM("MPFastcloseTx", MPTCP_MIB_MPFASTCLOSETX),
71 SNMP_MIB_ITEM("MPFastcloseRx", MPTCP_MIB_MPFASTCLOSERX),
72 SNMP_MIB_ITEM("MPRstTx", MPTCP_MIB_MPRSTTX),
73 SNMP_MIB_ITEM("MPRstRx", MPTCP_MIB_MPRSTRX),
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_ITEM("MPCapableDataFallback", MPTCP_MIB_MPCAPABLEDATAFALLBACK),
83 SNMP_MIB_ITEM("MD5SigFallback", MPTCP_MIB_MD5SIGFALLBACK),
84 SNMP_MIB_ITEM("DssFallback", MPTCP_MIB_DSSFALLBACK),
85 SNMP_MIB_ITEM("SimultConnectFallback", MPTCP_MIB_SIMULTCONNFALLBACK),
86 SNMP_MIB_ITEM("FallbackFailed", MPTCP_MIB_FALLBACKFAILED),
87 SNMP_MIB_ITEM("WinProbe", MPTCP_MIB_WINPROBE),
88};
89
90/* mptcp_mib_alloc - allocate percpu mib counters
91 *
92 * These are allocated when the first mptcp socket is created so
93 * we do not waste percpu memory if mptcp isn't in use.
94 */
95bool mptcp_mib_alloc(struct net *net)
96{
97 struct mptcp_mib __percpu *mib = alloc_percpu(struct mptcp_mib);
98
99 if (!mib)
100 return false;
101
102 if (cmpxchg(&net->mib.mptcp_statistics, NULL, mib))
103 free_percpu(pdata: mib);
104
105 return true;
106}
107
108void mptcp_seq_show(struct seq_file *seq)
109{
110 unsigned long sum[ARRAY_SIZE(mptcp_snmp_list)];
111 const int cnt = ARRAY_SIZE(mptcp_snmp_list);
112 struct net *net = seq->private;
113 int i;
114
115 seq_puts(m: seq, s: "MPTcpExt:");
116 for (i = 0; i < cnt; i++)
117 seq_printf(m: seq, fmt: " %s", mptcp_snmp_list[i].name);
118
119 seq_puts(m: seq, s: "\nMPTcpExt:");
120
121 memset(sum, 0, sizeof(sum));
122 if (net->mib.mptcp_statistics)
123 snmp_get_cpu_field_batch_cnt(sum, mptcp_snmp_list, cnt,
124 net->mib.mptcp_statistics);
125
126 for (i = 0; i < cnt; i++)
127 seq_printf(m: seq, fmt: " %lu", sum[i]);
128
129 seq_putc(m: seq, c: '\n');
130}
131

source code of linux/net/mptcp/mib.c