]>
Commit | Line | Data |
---|---|---|
fc518953 FW |
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("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), | |
25 | SNMP_MIB_SENTINEL | |
26 | }; | |
27 | ||
28 | /* mptcp_mib_alloc - allocate percpu mib counters | |
29 | * | |
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. | |
32 | */ | |
33 | bool mptcp_mib_alloc(struct net *net) | |
34 | { | |
35 | struct mptcp_mib __percpu *mib = alloc_percpu(struct mptcp_mib); | |
36 | ||
37 | if (!mib) | |
38 | return false; | |
39 | ||
40 | if (cmpxchg(&net->mib.mptcp_statistics, NULL, mib)) | |
41 | free_percpu(mib); | |
42 | ||
43 | return true; | |
44 | } | |
45 | ||
46 | void mptcp_seq_show(struct seq_file *seq) | |
47 | { | |
48 | struct net *net = seq->private; | |
49 | int i; | |
50 | ||
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); | |
54 | ||
55 | seq_puts(seq, "\nMPTcpExt:"); | |
56 | ||
57 | if (!net->mib.mptcp_statistics) { | |
58 | for (i = 0; mptcp_snmp_list[i].name; i++) | |
59 | seq_puts(seq, " 0"); | |
60 | ||
61 | return; | |
62 | } | |
63 | ||
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)); | |
68 | seq_putc(seq, '\n'); | |
69 | } |