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("InfiniteMapTx" , MPTCP_MIB_INFINITEMAPTX), |
28 | SNMP_MIB_ITEM("InfiniteMapRx" , MPTCP_MIB_INFINITEMAPRX), |
29 | SNMP_MIB_ITEM("DSSNoMatchTCP" , MPTCP_MIB_DSSTCPMISMATCH), |
30 | SNMP_MIB_ITEM("DataCsumErr" , MPTCP_MIB_DATACSUMERR), |
31 | SNMP_MIB_ITEM("OFOQueueTail" , MPTCP_MIB_OFOQUEUETAIL), |
32 | SNMP_MIB_ITEM("OFOQueue" , MPTCP_MIB_OFOQUEUE), |
33 | SNMP_MIB_ITEM("OFOMerge" , MPTCP_MIB_OFOMERGE), |
34 | SNMP_MIB_ITEM("NoDSSInWindow" , MPTCP_MIB_NODSSWINDOW), |
35 | SNMP_MIB_ITEM("DuplicateData" , MPTCP_MIB_DUPDATA), |
36 | SNMP_MIB_ITEM("AddAddr" , MPTCP_MIB_ADDADDR), |
37 | SNMP_MIB_ITEM("AddAddrTx" , MPTCP_MIB_ADDADDRTX), |
38 | SNMP_MIB_ITEM("AddAddrTxDrop" , MPTCP_MIB_ADDADDRTXDROP), |
39 | SNMP_MIB_ITEM("EchoAdd" , MPTCP_MIB_ECHOADD), |
40 | SNMP_MIB_ITEM("EchoAddTx" , MPTCP_MIB_ECHOADDTX), |
41 | SNMP_MIB_ITEM("EchoAddTxDrop" , MPTCP_MIB_ECHOADDTXDROP), |
42 | SNMP_MIB_ITEM("PortAdd" , MPTCP_MIB_PORTADD), |
43 | SNMP_MIB_ITEM("AddAddrDrop" , MPTCP_MIB_ADDADDRDROP), |
44 | SNMP_MIB_ITEM("MPJoinPortSynRx" , MPTCP_MIB_JOINPORTSYNRX), |
45 | SNMP_MIB_ITEM("MPJoinPortSynAckRx" , MPTCP_MIB_JOINPORTSYNACKRX), |
46 | SNMP_MIB_ITEM("MPJoinPortAckRx" , MPTCP_MIB_JOINPORTACKRX), |
47 | SNMP_MIB_ITEM("MismatchPortSynRx" , MPTCP_MIB_MISMATCHPORTSYNRX), |
48 | SNMP_MIB_ITEM("MismatchPortAckRx" , MPTCP_MIB_MISMATCHPORTACKRX), |
49 | SNMP_MIB_ITEM("RmAddr" , MPTCP_MIB_RMADDR), |
50 | SNMP_MIB_ITEM("RmAddrDrop" , MPTCP_MIB_RMADDRDROP), |
51 | SNMP_MIB_ITEM("RmAddrTx" , MPTCP_MIB_RMADDRTX), |
52 | SNMP_MIB_ITEM("RmAddrTxDrop" , MPTCP_MIB_RMADDRTXDROP), |
53 | SNMP_MIB_ITEM("RmSubflow" , MPTCP_MIB_RMSUBFLOW), |
54 | SNMP_MIB_ITEM("MPPrioTx" , MPTCP_MIB_MPPRIOTX), |
55 | SNMP_MIB_ITEM("MPPrioRx" , MPTCP_MIB_MPPRIORX), |
56 | SNMP_MIB_ITEM("MPFailTx" , MPTCP_MIB_MPFAILTX), |
57 | SNMP_MIB_ITEM("MPFailRx" , MPTCP_MIB_MPFAILRX), |
58 | SNMP_MIB_ITEM("MPFastcloseTx" , MPTCP_MIB_MPFASTCLOSETX), |
59 | SNMP_MIB_ITEM("MPFastcloseRx" , MPTCP_MIB_MPFASTCLOSERX), |
60 | SNMP_MIB_ITEM("MPRstTx" , MPTCP_MIB_MPRSTTX), |
61 | SNMP_MIB_ITEM("MPRstRx" , MPTCP_MIB_MPRSTRX), |
62 | SNMP_MIB_ITEM("RcvPruned" , MPTCP_MIB_RCVPRUNED), |
63 | SNMP_MIB_ITEM("SubflowStale" , MPTCP_MIB_SUBFLOWSTALE), |
64 | SNMP_MIB_ITEM("SubflowRecover" , MPTCP_MIB_SUBFLOWRECOVER), |
65 | SNMP_MIB_ITEM("SndWndShared" , MPTCP_MIB_SNDWNDSHARED), |
66 | SNMP_MIB_ITEM("RcvWndShared" , MPTCP_MIB_RCVWNDSHARED), |
67 | SNMP_MIB_ITEM("RcvWndConflictUpdate" , MPTCP_MIB_RCVWNDCONFLICTUPDATE), |
68 | SNMP_MIB_ITEM("RcvWndConflict" , MPTCP_MIB_RCVWNDCONFLICT), |
69 | SNMP_MIB_SENTINEL |
70 | }; |
71 | |
72 | /* mptcp_mib_alloc - allocate percpu mib counters |
73 | * |
74 | * These are allocated when the first mptcp socket is created so |
75 | * we do not waste percpu memory if mptcp isn't in use. |
76 | */ |
77 | bool mptcp_mib_alloc(struct net *net) |
78 | { |
79 | struct mptcp_mib __percpu *mib = alloc_percpu(struct mptcp_mib); |
80 | |
81 | if (!mib) |
82 | return false; |
83 | |
84 | if (cmpxchg(&net->mib.mptcp_statistics, NULL, mib)) |
85 | free_percpu(pdata: mib); |
86 | |
87 | return true; |
88 | } |
89 | |
90 | void mptcp_seq_show(struct seq_file *seq) |
91 | { |
92 | unsigned long sum[ARRAY_SIZE(mptcp_snmp_list) - 1]; |
93 | struct net *net = seq->private; |
94 | int i; |
95 | |
96 | seq_puts(m: seq, s: "MPTcpExt:" ); |
97 | for (i = 0; mptcp_snmp_list[i].name; i++) |
98 | seq_printf(m: seq, fmt: " %s" , mptcp_snmp_list[i].name); |
99 | |
100 | seq_puts(m: seq, s: "\nMPTcpExt:" ); |
101 | |
102 | memset(sum, 0, sizeof(sum)); |
103 | if (net->mib.mptcp_statistics) |
104 | snmp_get_cpu_field_batch(sum, mptcp_snmp_list, |
105 | net->mib.mptcp_statistics); |
106 | |
107 | for (i = 0; mptcp_snmp_list[i].name; i++) |
108 | seq_printf(m: seq, fmt: " %lu" , sum[i]); |
109 | |
110 | seq_putc(m: seq, c: '\n'); |
111 | } |
112 | |