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("MPCapableSYNTX", MPTCP_MIB_MPCAPABLEACTIVE), 14 SNMP_MIB_ITEM("MPCapableSYNACKRX", MPTCP_MIB_MPCAPABLEACTIVEACK), 15 SNMP_MIB_ITEM("MPCapableACKRX", MPTCP_MIB_MPCAPABLEPASSIVEACK), 16 SNMP_MIB_ITEM("MPCapableFallbackACK", MPTCP_MIB_MPCAPABLEPASSIVEFALLBACK), 17 SNMP_MIB_ITEM("MPCapableFallbackSYNACK", MPTCP_MIB_MPCAPABLEACTIVEFALLBACK), 18 SNMP_MIB_ITEM("MPFallbackTokenInit", MPTCP_MIB_TOKENFALLBACKINIT), 19 SNMP_MIB_ITEM("MPTCPRetrans", MPTCP_MIB_RETRANSSEGS), 20 SNMP_MIB_ITEM("MPJoinNoTokenFound", MPTCP_MIB_JOINNOTOKEN), 21 SNMP_MIB_ITEM("MPJoinSynRx", MPTCP_MIB_JOINSYNRX), 22 SNMP_MIB_ITEM("MPJoinSynAckRx", MPTCP_MIB_JOINSYNACKRX), 23 SNMP_MIB_ITEM("MPJoinSynAckHMacFailure", MPTCP_MIB_JOINSYNACKMAC), 24 SNMP_MIB_ITEM("MPJoinAckRx", MPTCP_MIB_JOINACKRX), 25 SNMP_MIB_ITEM("MPJoinAckHMacFailure", MPTCP_MIB_JOINACKMAC), 26 SNMP_MIB_ITEM("DSSNotMatching", MPTCP_MIB_DSSNOMATCH), 27 SNMP_MIB_ITEM("InfiniteMapTx", MPTCP_MIB_INFINITEMAPTX), 28 SNMP_MIB_ITEM("InfiniteMapRx", MPTCP_MIB_INFINITEMAPRX), 29 SNMP_MIB_ITEM("DSSNoMatchTCP", MPTCP_MIB_DSSTCPMISMATCH), 30 SNMP_MIB_ITEM("DataCsumErr", MPTCP_MIB_DATACSUMERR), 31 SNMP_MIB_ITEM("OFOQueueTail", MPTCP_MIB_OFOQUEUETAIL), 32 SNMP_MIB_ITEM("OFOQueue", MPTCP_MIB_OFOQUEUE), 33 SNMP_MIB_ITEM("OFOMerge", MPTCP_MIB_OFOMERGE), 34 SNMP_MIB_ITEM("NoDSSInWindow", MPTCP_MIB_NODSSWINDOW), 35 SNMP_MIB_ITEM("DuplicateData", MPTCP_MIB_DUPDATA), 36 SNMP_MIB_ITEM("AddAddr", MPTCP_MIB_ADDADDR), 37 SNMP_MIB_ITEM("AddAddrTx", MPTCP_MIB_ADDADDRTX), 38 SNMP_MIB_ITEM("AddAddrTxDrop", MPTCP_MIB_ADDADDRTXDROP), 39 SNMP_MIB_ITEM("EchoAdd", MPTCP_MIB_ECHOADD), 40 SNMP_MIB_ITEM("EchoAddTx", MPTCP_MIB_ECHOADDTX), 41 SNMP_MIB_ITEM("EchoAddTxDrop", MPTCP_MIB_ECHOADDTXDROP), 42 SNMP_MIB_ITEM("PortAdd", MPTCP_MIB_PORTADD), 43 SNMP_MIB_ITEM("AddAddrDrop", MPTCP_MIB_ADDADDRDROP), 44 SNMP_MIB_ITEM("MPJoinPortSynRx", MPTCP_MIB_JOINPORTSYNRX), 45 SNMP_MIB_ITEM("MPJoinPortSynAckRx", MPTCP_MIB_JOINPORTSYNACKRX), 46 SNMP_MIB_ITEM("MPJoinPortAckRx", MPTCP_MIB_JOINPORTACKRX), 47 SNMP_MIB_ITEM("MismatchPortSynRx", MPTCP_MIB_MISMATCHPORTSYNRX), 48 SNMP_MIB_ITEM("MismatchPortAckRx", MPTCP_MIB_MISMATCHPORTACKRX), 49 SNMP_MIB_ITEM("RmAddr", MPTCP_MIB_RMADDR), 50 SNMP_MIB_ITEM("RmAddrDrop", MPTCP_MIB_RMADDRDROP), 51 SNMP_MIB_ITEM("RmAddrTx", MPTCP_MIB_RMADDRTX), 52 SNMP_MIB_ITEM("RmAddrTxDrop", MPTCP_MIB_RMADDRTXDROP), 53 SNMP_MIB_ITEM("RmSubflow", MPTCP_MIB_RMSUBFLOW), 54 SNMP_MIB_ITEM("MPPrioTx", MPTCP_MIB_MPPRIOTX), 55 SNMP_MIB_ITEM("MPPrioRx", MPTCP_MIB_MPPRIORX), 56 SNMP_MIB_ITEM("MPFailTx", MPTCP_MIB_MPFAILTX), 57 SNMP_MIB_ITEM("MPFailRx", MPTCP_MIB_MPFAILRX), 58 SNMP_MIB_ITEM("MPFastcloseTx", MPTCP_MIB_MPFASTCLOSETX), 59 SNMP_MIB_ITEM("MPFastcloseRx", MPTCP_MIB_MPFASTCLOSERX), 60 SNMP_MIB_ITEM("MPRstTx", MPTCP_MIB_MPRSTTX), 61 SNMP_MIB_ITEM("MPRstRx", MPTCP_MIB_MPRSTRX), 62 SNMP_MIB_ITEM("RcvPruned", MPTCP_MIB_RCVPRUNED), 63 SNMP_MIB_ITEM("SubflowStale", MPTCP_MIB_SUBFLOWSTALE), 64 SNMP_MIB_ITEM("SubflowRecover", MPTCP_MIB_SUBFLOWRECOVER), 65 SNMP_MIB_ITEM("SndWndShared", MPTCP_MIB_SNDWNDSHARED), 66 SNMP_MIB_ITEM("RcvWndShared", MPTCP_MIB_RCVWNDSHARED), 67 SNMP_MIB_ITEM("RcvWndConflictUpdate", MPTCP_MIB_RCVWNDCONFLICTUPDATE), 68 SNMP_MIB_ITEM("RcvWndConflict", MPTCP_MIB_RCVWNDCONFLICT), 69 SNMP_MIB_ITEM("MPCurrEstab", MPTCP_MIB_CURRESTAB), 70 SNMP_MIB_SENTINEL 71 }; 72 73 /* mptcp_mib_alloc - allocate percpu mib counters 74 * 75 * These are allocated when the first mptcp socket is created so 76 * we do not waste percpu memory if mptcp isn't in use. 77 */ 78 bool mptcp_mib_alloc(struct net *net) 79 { 80 struct mptcp_mib __percpu *mib = alloc_percpu(struct mptcp_mib); 81 82 if (!mib) 83 return false; 84 85 if (cmpxchg(&net->mib.mptcp_statistics, NULL, mib)) 86 free_percpu(mib); 87 88 return true; 89 } 90 91 void mptcp_seq_show(struct seq_file *seq) 92 { 93 unsigned long sum[ARRAY_SIZE(mptcp_snmp_list) - 1]; 94 struct net *net = seq->private; 95 int i; 96 97 seq_puts(seq, "MPTcpExt:"); 98 for (i = 0; mptcp_snmp_list[i].name; i++) 99 seq_printf(seq, " %s", mptcp_snmp_list[i].name); 100 101 seq_puts(seq, "\nMPTcpExt:"); 102 103 memset(sum, 0, sizeof(sum)); 104 if (net->mib.mptcp_statistics) 105 snmp_get_cpu_field_batch(sum, mptcp_snmp_list, 106 net->mib.mptcp_statistics); 107 108 for (i = 0; mptcp_snmp_list[i].name; i++) 109 seq_printf(seq, " %lu", sum[i]); 110 111 seq_putc(seq, '\n'); 112 } 113