1 // SPDX-License-Identifier: GPL-2.0-or-later
3 #include <linux/seq_file.h>
7 #include <net/net_namespace.h>
11 static const struct snmp_mib mptcp_snmp_list[] = {
12 SNMP_MIB_ITEM("MPCapableSYNRX", MPTCP_MIB_MPCAPABLEPASSIVE),
13 SNMP_MIB_ITEM("MPCapableACKRX", MPTCP_MIB_MPCAPABLEPASSIVEACK),
14 SNMP_MIB_ITEM("MPCapableFallbackACK", MPTCP_MIB_MPCAPABLEPASSIVEFALLBACK),
15 SNMP_MIB_ITEM("MPCapableFallbackSYNACK", MPTCP_MIB_MPCAPABLEACTIVEFALLBACK),
16 SNMP_MIB_ITEM("MPTCPRetrans", MPTCP_MIB_RETRANSSEGS),
17 SNMP_MIB_ITEM("MPJoinNoTokenFound", MPTCP_MIB_JOINNOTOKEN),
18 SNMP_MIB_ITEM("MPJoinSynRx", MPTCP_MIB_JOINSYNRX),
19 SNMP_MIB_ITEM("MPJoinSynAckRx", MPTCP_MIB_JOINSYNACKRX),
20 SNMP_MIB_ITEM("MPJoinSynAckHMacFailure", MPTCP_MIB_JOINSYNACKMAC),
21 SNMP_MIB_ITEM("MPJoinAckRx", MPTCP_MIB_JOINACKRX),
22 SNMP_MIB_ITEM("MPJoinAckHMacFailure", MPTCP_MIB_JOINACKMAC),
23 SNMP_MIB_ITEM("DSSNotMatching", MPTCP_MIB_DSSNOMATCH),
24 SNMP_MIB_ITEM("InfiniteMapRx", MPTCP_MIB_INFINITEMAPRX),
28 /* mptcp_mib_alloc - allocate percpu mib counters
30 * These are allocated when the first mptcp socket is created so
31 * we do not waste percpu memory if mptcp isn't in use.
33 bool mptcp_mib_alloc(struct net *net)
35 struct mptcp_mib __percpu *mib = alloc_percpu(struct mptcp_mib);
40 if (cmpxchg(&net->mib.mptcp_statistics, NULL, mib))
46 void mptcp_seq_show(struct seq_file *seq)
48 struct net *net = seq->private;
51 seq_puts(seq, "MPTcpExt:");
52 for (i = 0; mptcp_snmp_list[i].name; i++)
53 seq_printf(seq, " %s", mptcp_snmp_list[i].name);
55 seq_puts(seq, "\nMPTcpExt:");
57 if (!net->mib.mptcp_statistics) {
58 for (i = 0; mptcp_snmp_list[i].name; i++)
64 for (i = 0; mptcp_snmp_list[i].name; i++)
65 seq_printf(seq, " %lu",
66 snmp_fold_field(net->mib.mptcp_statistics,
67 mptcp_snmp_list[i].entry));