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_ITEM("RcvPruned", MPTCP_MIB_RCVPRUNED), 48 SNMP_MIB_SENTINEL 49 }; 50 51 /* mptcp_mib_alloc - allocate percpu mib counters 52 * 53 * These are allocated when the first mptcp socket is created so 54 * we do not waste percpu memory if mptcp isn't in use. 55 */ 56 bool mptcp_mib_alloc(struct net *net) 57 { 58 struct mptcp_mib __percpu *mib = alloc_percpu(struct mptcp_mib); 59 60 if (!mib) 61 return false; 62 63 if (cmpxchg(&net->mib.mptcp_statistics, NULL, mib)) 64 free_percpu(mib); 65 66 return true; 67 } 68 69 void mptcp_seq_show(struct seq_file *seq) 70 { 71 struct net *net = seq->private; 72 int i; 73 74 seq_puts(seq, "MPTcpExt:"); 75 for (i = 0; mptcp_snmp_list[i].name; i++) 76 seq_printf(seq, " %s", mptcp_snmp_list[i].name); 77 78 seq_puts(seq, "\nMPTcpExt:"); 79 80 if (!net->mib.mptcp_statistics) { 81 for (i = 0; mptcp_snmp_list[i].name; i++) 82 seq_puts(seq, " 0"); 83 84 seq_putc(seq, '\n'); 85 return; 86 } 87 88 for (i = 0; mptcp_snmp_list[i].name; i++) 89 seq_printf(seq, " %lu", 90 snmp_fold_field(net->mib.mptcp_statistics, 91 mptcp_snmp_list[i].entry)); 92 seq_putc(seq, '\n'); 93 } 94