1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun
3*4882a593Smuzhiyun #include <linux/seq_file.h>
4*4882a593Smuzhiyun #include <net/ip.h>
5*4882a593Smuzhiyun #include <net/mptcp.h>
6*4882a593Smuzhiyun #include <net/snmp.h>
7*4882a593Smuzhiyun #include <net/net_namespace.h>
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include "mib.h"
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun static const struct snmp_mib mptcp_snmp_list[] = {
12*4882a593Smuzhiyun SNMP_MIB_ITEM("MPCapableSYNRX", MPTCP_MIB_MPCAPABLEPASSIVE),
13*4882a593Smuzhiyun SNMP_MIB_ITEM("MPCapableACKRX", MPTCP_MIB_MPCAPABLEPASSIVEACK),
14*4882a593Smuzhiyun SNMP_MIB_ITEM("MPCapableFallbackACK", MPTCP_MIB_MPCAPABLEPASSIVEFALLBACK),
15*4882a593Smuzhiyun SNMP_MIB_ITEM("MPCapableFallbackSYNACK", MPTCP_MIB_MPCAPABLEACTIVEFALLBACK),
16*4882a593Smuzhiyun SNMP_MIB_ITEM("MPTCPRetrans", MPTCP_MIB_RETRANSSEGS),
17*4882a593Smuzhiyun SNMP_MIB_ITEM("MPJoinNoTokenFound", MPTCP_MIB_JOINNOTOKEN),
18*4882a593Smuzhiyun SNMP_MIB_ITEM("MPJoinSynRx", MPTCP_MIB_JOINSYNRX),
19*4882a593Smuzhiyun SNMP_MIB_ITEM("MPJoinSynAckRx", MPTCP_MIB_JOINSYNACKRX),
20*4882a593Smuzhiyun SNMP_MIB_ITEM("MPJoinSynAckHMacFailure", MPTCP_MIB_JOINSYNACKMAC),
21*4882a593Smuzhiyun SNMP_MIB_ITEM("MPJoinAckRx", MPTCP_MIB_JOINACKRX),
22*4882a593Smuzhiyun SNMP_MIB_ITEM("MPJoinAckHMacFailure", MPTCP_MIB_JOINACKMAC),
23*4882a593Smuzhiyun SNMP_MIB_ITEM("DSSNotMatching", MPTCP_MIB_DSSNOMATCH),
24*4882a593Smuzhiyun SNMP_MIB_ITEM("InfiniteMapRx", MPTCP_MIB_INFINITEMAPRX),
25*4882a593Smuzhiyun SNMP_MIB_ITEM("OFOQueueTail", MPTCP_MIB_OFOQUEUETAIL),
26*4882a593Smuzhiyun SNMP_MIB_ITEM("OFOQueue", MPTCP_MIB_OFOQUEUE),
27*4882a593Smuzhiyun SNMP_MIB_ITEM("OFOMerge", MPTCP_MIB_OFOMERGE),
28*4882a593Smuzhiyun SNMP_MIB_ITEM("NoDSSInWindow", MPTCP_MIB_NODSSWINDOW),
29*4882a593Smuzhiyun SNMP_MIB_ITEM("DuplicateData", MPTCP_MIB_DUPDATA),
30*4882a593Smuzhiyun SNMP_MIB_ITEM("AddAddr", MPTCP_MIB_ADDADDR),
31*4882a593Smuzhiyun SNMP_MIB_ITEM("EchoAdd", MPTCP_MIB_ECHOADD),
32*4882a593Smuzhiyun SNMP_MIB_ITEM("RmAddr", MPTCP_MIB_RMADDR),
33*4882a593Smuzhiyun SNMP_MIB_ITEM("RmSubflow", MPTCP_MIB_RMSUBFLOW),
34*4882a593Smuzhiyun SNMP_MIB_SENTINEL
35*4882a593Smuzhiyun };
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun /* mptcp_mib_alloc - allocate percpu mib counters
38*4882a593Smuzhiyun *
39*4882a593Smuzhiyun * These are allocated when the first mptcp socket is created so
40*4882a593Smuzhiyun * we do not waste percpu memory if mptcp isn't in use.
41*4882a593Smuzhiyun */
mptcp_mib_alloc(struct net * net)42*4882a593Smuzhiyun bool mptcp_mib_alloc(struct net *net)
43*4882a593Smuzhiyun {
44*4882a593Smuzhiyun struct mptcp_mib __percpu *mib = alloc_percpu(struct mptcp_mib);
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun if (!mib)
47*4882a593Smuzhiyun return false;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun if (cmpxchg(&net->mib.mptcp_statistics, NULL, mib))
50*4882a593Smuzhiyun free_percpu(mib);
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun return true;
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
mptcp_seq_show(struct seq_file * seq)55*4882a593Smuzhiyun void mptcp_seq_show(struct seq_file *seq)
56*4882a593Smuzhiyun {
57*4882a593Smuzhiyun struct net *net = seq->private;
58*4882a593Smuzhiyun int i;
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun seq_puts(seq, "MPTcpExt:");
61*4882a593Smuzhiyun for (i = 0; mptcp_snmp_list[i].name; i++)
62*4882a593Smuzhiyun seq_printf(seq, " %s", mptcp_snmp_list[i].name);
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun seq_puts(seq, "\nMPTcpExt:");
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun if (!net->mib.mptcp_statistics) {
67*4882a593Smuzhiyun for (i = 0; mptcp_snmp_list[i].name; i++)
68*4882a593Smuzhiyun seq_puts(seq, " 0");
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun seq_putc(seq, '\n');
71*4882a593Smuzhiyun return;
72*4882a593Smuzhiyun }
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun for (i = 0; mptcp_snmp_list[i].name; i++)
75*4882a593Smuzhiyun seq_printf(seq, " %lu",
76*4882a593Smuzhiyun snmp_fold_field(net->mib.mptcp_statistics,
77*4882a593Smuzhiyun mptcp_snmp_list[i].entry));
78*4882a593Smuzhiyun seq_putc(seq, '\n');
79*4882a593Smuzhiyun }
80