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("MPFallbackTokenInit", MPTCP_MIB_TOKENFALLBACKINIT),
19 SNMP_MIB_ITEM("MPTCPRetrans", MPTCP_MIB_RETRANSSEGS),
20 SNMP_MIB_ITEM("MPJoinNoTokenFound", MPTCP_MIB_JOINNOTOKEN),
21 SNMP_MIB_ITEM("MPJoinSynRx", MPTCP_MIB_JOINSYNRX),
22 SNMP_MIB_ITEM("MPJoinSynAckRx", MPTCP_MIB_JOINSYNACKRX),
23 SNMP_MIB_ITEM("MPJoinSynAckHMacFailure", MPTCP_MIB_JOINSYNACKMAC),
24 SNMP_MIB_ITEM("MPJoinAckRx", MPTCP_MIB_JOINACKRX),
25 SNMP_MIB_ITEM("MPJoinAckHMacFailure", MPTCP_MIB_JOINACKMAC),
26 SNMP_MIB_ITEM("DSSNotMatching", MPTCP_MIB_DSSNOMATCH),
27 SNMP_MIB_ITEM("InfiniteMapRx", MPTCP_MIB_INFINITEMAPRX),
28 SNMP_MIB_ITEM("DSSNoMatchTCP", MPTCP_MIB_DSSTCPMISMATCH),
29 SNMP_MIB_ITEM("DataCsumErr", MPTCP_MIB_DATACSUMERR),
30 SNMP_MIB_ITEM("OFOQueueTail", MPTCP_MIB_OFOQUEUETAIL),
31 SNMP_MIB_ITEM("OFOQueue", MPTCP_MIB_OFOQUEUE),
32 SNMP_MIB_ITEM("OFOMerge", MPTCP_MIB_OFOMERGE),
33 SNMP_MIB_ITEM("NoDSSInWindow", MPTCP_MIB_NODSSWINDOW),
34 SNMP_MIB_ITEM("DuplicateData", MPTCP_MIB_DUPDATA),
35 SNMP_MIB_ITEM("AddAddr", MPTCP_MIB_ADDADDR),
36 SNMP_MIB_ITEM("EchoAdd", MPTCP_MIB_ECHOADD),
37 SNMP_MIB_ITEM("PortAdd", MPTCP_MIB_PORTADD),
38 SNMP_MIB_ITEM("AddAddrDrop", MPTCP_MIB_ADDADDRDROP),
39 SNMP_MIB_ITEM("MPJoinPortSynRx", MPTCP_MIB_JOINPORTSYNRX),
40 SNMP_MIB_ITEM("MPJoinPortSynAckRx", MPTCP_MIB_JOINPORTSYNACKRX),
41 SNMP_MIB_ITEM("MPJoinPortAckRx", MPTCP_MIB_JOINPORTACKRX),
42 SNMP_MIB_ITEM("MismatchPortSynRx", MPTCP_MIB_MISMATCHPORTSYNRX),
43 SNMP_MIB_ITEM("MismatchPortAckRx", MPTCP_MIB_MISMATCHPORTACKRX),
44 SNMP_MIB_ITEM("RmAddr", MPTCP_MIB_RMADDR),
45 SNMP_MIB_ITEM("RmAddrDrop", MPTCP_MIB_RMADDRDROP),
46 SNMP_MIB_ITEM("RmSubflow", MPTCP_MIB_RMSUBFLOW),
47 SNMP_MIB_ITEM("MPPrioTx", MPTCP_MIB_MPPRIOTX),
48 SNMP_MIB_ITEM("MPPrioRx", MPTCP_MIB_MPPRIORX),
49 SNMP_MIB_ITEM("MPFailTx", MPTCP_MIB_MPFAILTX),
50 SNMP_MIB_ITEM("MPFailRx", MPTCP_MIB_MPFAILRX),
51 SNMP_MIB_ITEM("RcvPruned", MPTCP_MIB_RCVPRUNED),
52 SNMP_MIB_ITEM("SubflowStale", MPTCP_MIB_SUBFLOWSTALE),
53 SNMP_MIB_ITEM("SubflowRecover", MPTCP_MIB_SUBFLOWRECOVER),
54 SNMP_MIB_SENTINEL
55 };
56
57 /* mptcp_mib_alloc - allocate percpu mib counters
58 *
59 * These are allocated when the first mptcp socket is created so
60 * we do not waste percpu memory if mptcp isn't in use.
61 */
mptcp_mib_alloc(struct net * net)62 bool mptcp_mib_alloc(struct net *net)
63 {
64 struct mptcp_mib __percpu *mib = alloc_percpu(struct mptcp_mib);
65
66 if (!mib)
67 return false;
68
69 if (cmpxchg(&net->mib.mptcp_statistics, NULL, mib))
70 free_percpu(mib);
71
72 return true;
73 }
74
mptcp_seq_show(struct seq_file * seq)75 void mptcp_seq_show(struct seq_file *seq)
76 {
77 struct net *net = seq->private;
78 int i;
79
80 seq_puts(seq, "MPTcpExt:");
81 for (i = 0; mptcp_snmp_list[i].name; i++)
82 seq_printf(seq, " %s", mptcp_snmp_list[i].name);
83
84 seq_puts(seq, "\nMPTcpExt:");
85
86 if (!net->mib.mptcp_statistics) {
87 for (i = 0; mptcp_snmp_list[i].name; i++)
88 seq_puts(seq, " 0");
89
90 seq_putc(seq, '\n');
91 return;
92 }
93
94 for (i = 0; mptcp_snmp_list[i].name; i++)
95 seq_printf(seq, " %lu",
96 snmp_fold_field(net->mib.mptcp_statistics,
97 mptcp_snmp_list[i].entry));
98 seq_putc(seq, '\n');
99 }
100