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("InfiniteMapRx", MPTCP_MIB_INFINITEMAPRX), 28 SNMP_MIB_ITEM("DSSNoMatchTCP", MPTCP_MIB_DSSTCPMISMATCH), 29 SNMP_MIB_ITEM("DataCsumErr", MPTCP_MIB_DATACSUMERR), 30 SNMP_MIB_ITEM("OFOQueueTail", MPTCP_MIB_OFOQUEUETAIL), 31 SNMP_MIB_ITEM("OFOQueue", MPTCP_MIB_OFOQUEUE), 32 SNMP_MIB_ITEM("OFOMerge", MPTCP_MIB_OFOMERGE), 33 SNMP_MIB_ITEM("NoDSSInWindow", MPTCP_MIB_NODSSWINDOW), 34 SNMP_MIB_ITEM("DuplicateData", MPTCP_MIB_DUPDATA), 35 SNMP_MIB_ITEM("AddAddr", MPTCP_MIB_ADDADDR), 36 SNMP_MIB_ITEM("EchoAdd", MPTCP_MIB_ECHOADD), 37 SNMP_MIB_ITEM("PortAdd", MPTCP_MIB_PORTADD), 38 SNMP_MIB_ITEM("MPJoinPortSynRx", MPTCP_MIB_JOINPORTSYNRX), 39 SNMP_MIB_ITEM("MPJoinPortSynAckRx", MPTCP_MIB_JOINPORTSYNACKRX), 40 SNMP_MIB_ITEM("MPJoinPortAckRx", MPTCP_MIB_JOINPORTACKRX), 41 SNMP_MIB_ITEM("MismatchPortSynRx", MPTCP_MIB_MISMATCHPORTSYNRX), 42 SNMP_MIB_ITEM("MismatchPortAckRx", MPTCP_MIB_MISMATCHPORTACKRX), 43 SNMP_MIB_ITEM("RmAddr", MPTCP_MIB_RMADDR), 44 SNMP_MIB_ITEM("RmSubflow", MPTCP_MIB_RMSUBFLOW), 45 SNMP_MIB_ITEM("MPPrioTx", MPTCP_MIB_MPPRIOTX), 46 SNMP_MIB_ITEM("MPPrioRx", MPTCP_MIB_MPPRIORX), 47 SNMP_MIB_SENTINEL 48 }; 49 50 /* mptcp_mib_alloc - allocate percpu mib counters 51 * 52 * These are allocated when the first mptcp socket is created so 53 * we do not waste percpu memory if mptcp isn't in use. 54 */ 55 bool mptcp_mib_alloc(struct net *net) 56 { 57 struct mptcp_mib __percpu *mib = alloc_percpu(struct mptcp_mib); 58 59 if (!mib) 60 return false; 61 62 if (cmpxchg(&net->mib.mptcp_statistics, NULL, mib)) 63 free_percpu(mib); 64 65 return true; 66 } 67 68 void mptcp_seq_show(struct seq_file *seq) 69 { 70 struct net *net = seq->private; 71 int i; 72 73 seq_puts(seq, "MPTcpExt:"); 74 for (i = 0; mptcp_snmp_list[i].name; i++) 75 seq_printf(seq, " %s", mptcp_snmp_list[i].name); 76 77 seq_puts(seq, "\nMPTcpExt:"); 78 79 if (!net->mib.mptcp_statistics) { 80 for (i = 0; mptcp_snmp_list[i].name; i++) 81 seq_puts(seq, " 0"); 82 83 seq_putc(seq, '\n'); 84 return; 85 } 86 87 for (i = 0; mptcp_snmp_list[i].name; i++) 88 seq_printf(seq, " %lu", 89 snmp_fold_field(net->mib.mptcp_statistics, 90 mptcp_snmp_list[i].entry)); 91 seq_putc(seq, '\n'); 92 } 93