| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame] | 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_ITEM("OFOQueueTail", MPTCP_MIB_OFOQUEUETAIL), |
| 26 | SNMP_MIB_ITEM("OFOQueue", MPTCP_MIB_OFOQUEUE), |
| 27 | SNMP_MIB_ITEM("OFOMerge", MPTCP_MIB_OFOMERGE), |
| 28 | SNMP_MIB_ITEM("NoDSSInWindow", MPTCP_MIB_NODSSWINDOW), |
| 29 | SNMP_MIB_ITEM("DuplicateData", MPTCP_MIB_DUPDATA), |
| 30 | SNMP_MIB_ITEM("AddAddr", MPTCP_MIB_ADDADDR), |
| 31 | SNMP_MIB_ITEM("EchoAdd", MPTCP_MIB_ECHOADD), |
| 32 | SNMP_MIB_ITEM("RmAddr", MPTCP_MIB_RMADDR), |
| 33 | SNMP_MIB_ITEM("RmSubflow", MPTCP_MIB_RMSUBFLOW), |
| 34 | SNMP_MIB_SENTINEL |
| 35 | }; |
| 36 | |
| 37 | /* mptcp_mib_alloc - allocate percpu mib counters |
| 38 | * |
| 39 | * These are allocated when the first mptcp socket is created so |
| 40 | * we do not waste percpu memory if mptcp isn't in use. |
| 41 | */ |
| 42 | bool mptcp_mib_alloc(struct net *net) |
| 43 | { |
| 44 | struct mptcp_mib __percpu *mib = alloc_percpu(struct mptcp_mib); |
| 45 | |
| 46 | if (!mib) |
| 47 | return false; |
| 48 | |
| 49 | if (cmpxchg(&net->mib.mptcp_statistics, NULL, mib)) |
| 50 | free_percpu(mib); |
| 51 | |
| 52 | return true; |
| 53 | } |
| 54 | |
| 55 | void mptcp_seq_show(struct seq_file *seq) |
| 56 | { |
| 57 | struct net *net = seq->private; |
| 58 | int i; |
| 59 | |
| 60 | seq_puts(seq, "MPTcpExt:"); |
| 61 | for (i = 0; mptcp_snmp_list[i].name; i++) |
| 62 | seq_printf(seq, " %s", mptcp_snmp_list[i].name); |
| 63 | |
| 64 | seq_puts(seq, "\nMPTcpExt:"); |
| 65 | |
| 66 | if (!net->mib.mptcp_statistics) { |
| 67 | for (i = 0; mptcp_snmp_list[i].name; i++) |
| 68 | seq_puts(seq, " 0"); |
| 69 | |
| 70 | seq_putc(seq, '\n'); |
| 71 | return; |
| 72 | } |
| 73 | |
| 74 | for (i = 0; mptcp_snmp_list[i].name; i++) |
| 75 | seq_printf(seq, " %lu", |
| 76 | snmp_fold_field(net->mib.mptcp_statistics, |
| 77 | mptcp_snmp_list[i].entry)); |
| 78 | seq_putc(seq, '\n'); |
| 79 | } |