xref: /openbmc/linux/net/mptcp/mib.c (revision 5e0266f0)
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("EchoAdd", MPTCP_MIB_ECHOADD),
38  	SNMP_MIB_ITEM("PortAdd", MPTCP_MIB_PORTADD),
39  	SNMP_MIB_ITEM("AddAddrDrop", MPTCP_MIB_ADDADDRDROP),
40  	SNMP_MIB_ITEM("MPJoinPortSynRx", MPTCP_MIB_JOINPORTSYNRX),
41  	SNMP_MIB_ITEM("MPJoinPortSynAckRx", MPTCP_MIB_JOINPORTSYNACKRX),
42  	SNMP_MIB_ITEM("MPJoinPortAckRx", MPTCP_MIB_JOINPORTACKRX),
43  	SNMP_MIB_ITEM("MismatchPortSynRx", MPTCP_MIB_MISMATCHPORTSYNRX),
44  	SNMP_MIB_ITEM("MismatchPortAckRx", MPTCP_MIB_MISMATCHPORTACKRX),
45  	SNMP_MIB_ITEM("RmAddr", MPTCP_MIB_RMADDR),
46  	SNMP_MIB_ITEM("RmAddrDrop", MPTCP_MIB_RMADDRDROP),
47  	SNMP_MIB_ITEM("RmSubflow", MPTCP_MIB_RMSUBFLOW),
48  	SNMP_MIB_ITEM("MPPrioTx", MPTCP_MIB_MPPRIOTX),
49  	SNMP_MIB_ITEM("MPPrioRx", MPTCP_MIB_MPPRIORX),
50  	SNMP_MIB_ITEM("MPFailTx", MPTCP_MIB_MPFAILTX),
51  	SNMP_MIB_ITEM("MPFailRx", MPTCP_MIB_MPFAILRX),
52  	SNMP_MIB_ITEM("MPFastcloseTx", MPTCP_MIB_MPFASTCLOSETX),
53  	SNMP_MIB_ITEM("MPFastcloseRx", MPTCP_MIB_MPFASTCLOSERX),
54  	SNMP_MIB_ITEM("MPRstTx", MPTCP_MIB_MPRSTTX),
55  	SNMP_MIB_ITEM("MPRstRx", MPTCP_MIB_MPRSTRX),
56  	SNMP_MIB_ITEM("RcvPruned", MPTCP_MIB_RCVPRUNED),
57  	SNMP_MIB_ITEM("SubflowStale", MPTCP_MIB_SUBFLOWSTALE),
58  	SNMP_MIB_ITEM("SubflowRecover", MPTCP_MIB_SUBFLOWRECOVER),
59  	SNMP_MIB_ITEM("SndWndShared", MPTCP_MIB_SNDWNDSHARED),
60  	SNMP_MIB_ITEM("RcvWndShared", MPTCP_MIB_RCVWNDSHARED),
61  	SNMP_MIB_ITEM("RcvWndConflictUpdate", MPTCP_MIB_RCVWNDCONFLICTUPDATE),
62  	SNMP_MIB_ITEM("RcvWndConflict", MPTCP_MIB_RCVWNDCONFLICT),
63  	SNMP_MIB_SENTINEL
64  };
65  
66  /* mptcp_mib_alloc - allocate percpu mib counters
67   *
68   * These are allocated when the first mptcp socket is created so
69   * we do not waste percpu memory if mptcp isn't in use.
70   */
71  bool mptcp_mib_alloc(struct net *net)
72  {
73  	struct mptcp_mib __percpu *mib = alloc_percpu(struct mptcp_mib);
74  
75  	if (!mib)
76  		return false;
77  
78  	if (cmpxchg(&net->mib.mptcp_statistics, NULL, mib))
79  		free_percpu(mib);
80  
81  	return true;
82  }
83  
84  void mptcp_seq_show(struct seq_file *seq)
85  {
86  	unsigned long sum[ARRAY_SIZE(mptcp_snmp_list) - 1];
87  	struct net *net = seq->private;
88  	int i;
89  
90  	seq_puts(seq, "MPTcpExt:");
91  	for (i = 0; mptcp_snmp_list[i].name; i++)
92  		seq_printf(seq, " %s", mptcp_snmp_list[i].name);
93  
94  	seq_puts(seq, "\nMPTcpExt:");
95  
96  	memset(sum, 0, sizeof(sum));
97  	if (net->mib.mptcp_statistics)
98  		snmp_get_cpu_field_batch(sum, mptcp_snmp_list,
99  					 net->mib.mptcp_statistics);
100  
101  	for (i = 0; mptcp_snmp_list[i].name; i++)
102  		seq_printf(seq, " %lu", sum[i]);
103  
104  	seq_putc(seq, '\n');
105  }
106