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("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_ITEM("MPCurrEstab", MPTCP_MIB_CURRESTAB),
70	SNMP_MIB_SENTINEL
71};
72
73/* mptcp_mib_alloc - allocate percpu mib counters
74 *
75 * These are allocated when the first mptcp socket is created so
76 * we do not waste percpu memory if mptcp isn't in use.
77 */
78bool mptcp_mib_alloc(struct net *net)
79{
80	struct mptcp_mib __percpu *mib = alloc_percpu(struct mptcp_mib);
81
82	if (!mib)
83		return false;
84
85	if (cmpxchg(&net->mib.mptcp_statistics, NULL, mib))
86		free_percpu(mib);
87
88	return true;
89}
90
91void mptcp_seq_show(struct seq_file *seq)
92{
93	unsigned long sum[ARRAY_SIZE(mptcp_snmp_list) - 1];
94	struct net *net = seq->private;
95	int i;
96
97	seq_puts(seq, "MPTcpExt:");
98	for (i = 0; mptcp_snmp_list[i].name; i++)
99		seq_printf(seq, " %s", mptcp_snmp_list[i].name);
100
101	seq_puts(seq, "\nMPTcpExt:");
102
103	memset(sum, 0, sizeof(sum));
104	if (net->mib.mptcp_statistics)
105		snmp_get_cpu_field_batch(sum, mptcp_snmp_list,
106					 net->mib.mptcp_statistics);
107
108	for (i = 0; mptcp_snmp_list[i].name; i++)
109		seq_printf(seq, " %lu", sum[i]);
110
111	seq_putc(seq, '\n');
112}
113