mib.c

  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(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(seq, "MPTcpExt:");
116	for (i = 0; i < cnt; i++)
117		seq_printf(seq, " %s", mptcp_snmp_list[i].name);
118
119	seq_puts(seq, "\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(seq, " %lu", sum[i]);
128
129	seq_putc(seq, '\n');
130}