projects / linux-block.git / blame
| 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), | |
| 06242e44 PA |
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), | |
| a877de06 GT |
30 | SNMP_MIB_ITEM("AddAddr", MPTCP_MIB_ADDADDR), |
| 31 | SNMP_MIB_ITEM("EchoAdd", MPTCP_MIB_ECHOADD), | |
| 7a7e52e3 GT |
32 | SNMP_MIB_ITEM("RmAddr", MPTCP_MIB_RMADDR), |
| 33 | SNMP_MIB_ITEM("RmSubflow", MPTCP_MIB_RMSUBFLOW), | |
| 0be2ac28 GT |
34 | SNMP_MIB_ITEM("MPPrioTx", MPTCP_MIB_MPPRIOTX), |
| 35 | SNMP_MIB_ITEM("MPPrioRx", MPTCP_MIB_MPPRIORX), | |
| fc518953 FW |
36 | SNMP_MIB_SENTINEL |
| 37 | }; | |
| 38 | ||
| 39 | /* mptcp_mib_alloc - allocate percpu mib counters | |
| 40 | * | |
| 41 | * These are allocated when the first mptcp socket is created so | |
| 42 | * we do not waste percpu memory if mptcp isn't in use. | |
| 43 | */ | |
| 44 | bool mptcp_mib_alloc(struct net *net) | |
| 45 | { | |
| 46 | struct mptcp_mib __percpu *mib = alloc_percpu(struct mptcp_mib); | |
| 47 | ||
| 48 | if (!mib) | |
| 49 | return false; | |
| 50 | ||
| 51 | if (cmpxchg(&net->mib.mptcp_statistics, NULL, mib)) | |
| 52 | free_percpu(mib); | |
| 53 | ||
| 54 | return true; | |
| 55 | } | |
| 56 | ||
| 57 | void mptcp_seq_show(struct seq_file *seq) | |
| 58 | { | |
| 59 | struct net *net = seq->private; | |
| 60 | int i; | |
| 61 | ||
| 62 | seq_puts(seq, "MPTcpExt:"); | |
| 63 | for (i = 0; mptcp_snmp_list[i].name; i++) | |
| 64 | seq_printf(seq, " %s", mptcp_snmp_list[i].name); | |
| 65 | ||
| 66 | seq_puts(seq, "\nMPTcpExt:"); | |
| 67 | ||
| 68 | if (!net->mib.mptcp_statistics) { | |
| 69 | for (i = 0; mptcp_snmp_list[i].name; i++) | |
| 70 | seq_puts(seq, " 0"); | |
| 71 | ||
| f55628b3 | 72 | seq_putc(seq, '\n'); |
| fc518953 FW |
73 | return; |
| 74 | } | |
| 75 | ||
| 76 | for (i = 0; mptcp_snmp_list[i].name; i++) | |
| 77 | seq_printf(seq, " %lu", | |
| 78 | snmp_fold_field(net->mib.mptcp_statistics, | |
| 79 | mptcp_snmp_list[i].entry)); | |
| 80 | seq_putc(seq, '\n'); | |
| 81 | } |