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-rw-r--r--net/mptcp/mib.c105
1 files changed, 105 insertions, 0 deletions
diff --git a/net/mptcp/mib.c b/net/mptcp/mib.c
new file mode 100644
index 000000000..0dac2863c
--- /dev/null
+++ b/net/mptcp/mib.c
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <linux/seq_file.h>
+#include <net/ip.h>
+#include <net/mptcp.h>
+#include <net/snmp.h>
+#include <net/net_namespace.h>
+
+#include "mib.h"
+
+static const struct snmp_mib mptcp_snmp_list[] = {
+ SNMP_MIB_ITEM("MPCapableSYNRX", MPTCP_MIB_MPCAPABLEPASSIVE),
+ SNMP_MIB_ITEM("MPCapableSYNTX", MPTCP_MIB_MPCAPABLEACTIVE),
+ SNMP_MIB_ITEM("MPCapableSYNACKRX", MPTCP_MIB_MPCAPABLEACTIVEACK),
+ SNMP_MIB_ITEM("MPCapableACKRX", MPTCP_MIB_MPCAPABLEPASSIVEACK),
+ SNMP_MIB_ITEM("MPCapableFallbackACK", MPTCP_MIB_MPCAPABLEPASSIVEFALLBACK),
+ SNMP_MIB_ITEM("MPCapableFallbackSYNACK", MPTCP_MIB_MPCAPABLEACTIVEFALLBACK),
+ SNMP_MIB_ITEM("MPFallbackTokenInit", MPTCP_MIB_TOKENFALLBACKINIT),
+ SNMP_MIB_ITEM("MPTCPRetrans", MPTCP_MIB_RETRANSSEGS),
+ SNMP_MIB_ITEM("MPJoinNoTokenFound", MPTCP_MIB_JOINNOTOKEN),
+ SNMP_MIB_ITEM("MPJoinSynRx", MPTCP_MIB_JOINSYNRX),
+ SNMP_MIB_ITEM("MPJoinSynAckRx", MPTCP_MIB_JOINSYNACKRX),
+ SNMP_MIB_ITEM("MPJoinSynAckHMacFailure", MPTCP_MIB_JOINSYNACKMAC),
+ SNMP_MIB_ITEM("MPJoinAckRx", MPTCP_MIB_JOINACKRX),
+ SNMP_MIB_ITEM("MPJoinAckHMacFailure", MPTCP_MIB_JOINACKMAC),
+ SNMP_MIB_ITEM("DSSNotMatching", MPTCP_MIB_DSSNOMATCH),
+ SNMP_MIB_ITEM("InfiniteMapTx", MPTCP_MIB_INFINITEMAPTX),
+ SNMP_MIB_ITEM("InfiniteMapRx", MPTCP_MIB_INFINITEMAPRX),
+ SNMP_MIB_ITEM("DSSNoMatchTCP", MPTCP_MIB_DSSTCPMISMATCH),
+ SNMP_MIB_ITEM("DataCsumErr", MPTCP_MIB_DATACSUMERR),
+ SNMP_MIB_ITEM("OFOQueueTail", MPTCP_MIB_OFOQUEUETAIL),
+ SNMP_MIB_ITEM("OFOQueue", MPTCP_MIB_OFOQUEUE),
+ SNMP_MIB_ITEM("OFOMerge", MPTCP_MIB_OFOMERGE),
+ SNMP_MIB_ITEM("NoDSSInWindow", MPTCP_MIB_NODSSWINDOW),
+ SNMP_MIB_ITEM("DuplicateData", MPTCP_MIB_DUPDATA),
+ SNMP_MIB_ITEM("AddAddr", MPTCP_MIB_ADDADDR),
+ SNMP_MIB_ITEM("EchoAdd", MPTCP_MIB_ECHOADD),
+ SNMP_MIB_ITEM("PortAdd", MPTCP_MIB_PORTADD),
+ SNMP_MIB_ITEM("AddAddrDrop", MPTCP_MIB_ADDADDRDROP),
+ SNMP_MIB_ITEM("MPJoinPortSynRx", MPTCP_MIB_JOINPORTSYNRX),
+ SNMP_MIB_ITEM("MPJoinPortSynAckRx", MPTCP_MIB_JOINPORTSYNACKRX),
+ SNMP_MIB_ITEM("MPJoinPortAckRx", MPTCP_MIB_JOINPORTACKRX),
+ SNMP_MIB_ITEM("MismatchPortSynRx", MPTCP_MIB_MISMATCHPORTSYNRX),
+ SNMP_MIB_ITEM("MismatchPortAckRx", MPTCP_MIB_MISMATCHPORTACKRX),
+ SNMP_MIB_ITEM("RmAddr", MPTCP_MIB_RMADDR),
+ SNMP_MIB_ITEM("RmAddrDrop", MPTCP_MIB_RMADDRDROP),
+ SNMP_MIB_ITEM("RmSubflow", MPTCP_MIB_RMSUBFLOW),
+ SNMP_MIB_ITEM("MPPrioTx", MPTCP_MIB_MPPRIOTX),
+ SNMP_MIB_ITEM("MPPrioRx", MPTCP_MIB_MPPRIORX),
+ SNMP_MIB_ITEM("MPFailTx", MPTCP_MIB_MPFAILTX),
+ SNMP_MIB_ITEM("MPFailRx", MPTCP_MIB_MPFAILRX),
+ SNMP_MIB_ITEM("MPFastcloseTx", MPTCP_MIB_MPFASTCLOSETX),
+ SNMP_MIB_ITEM("MPFastcloseRx", MPTCP_MIB_MPFASTCLOSERX),
+ SNMP_MIB_ITEM("MPRstTx", MPTCP_MIB_MPRSTTX),
+ SNMP_MIB_ITEM("MPRstRx", MPTCP_MIB_MPRSTRX),
+ SNMP_MIB_ITEM("RcvPruned", MPTCP_MIB_RCVPRUNED),
+ SNMP_MIB_ITEM("SubflowStale", MPTCP_MIB_SUBFLOWSTALE),
+ SNMP_MIB_ITEM("SubflowRecover", MPTCP_MIB_SUBFLOWRECOVER),
+ SNMP_MIB_ITEM("SndWndShared", MPTCP_MIB_SNDWNDSHARED),
+ SNMP_MIB_ITEM("RcvWndShared", MPTCP_MIB_RCVWNDSHARED),
+ SNMP_MIB_ITEM("RcvWndConflictUpdate", MPTCP_MIB_RCVWNDCONFLICTUPDATE),
+ SNMP_MIB_ITEM("RcvWndConflict", MPTCP_MIB_RCVWNDCONFLICT),
+ SNMP_MIB_SENTINEL
+};
+
+/* mptcp_mib_alloc - allocate percpu mib counters
+ *
+ * These are allocated when the first mptcp socket is created so
+ * we do not waste percpu memory if mptcp isn't in use.
+ */
+bool mptcp_mib_alloc(struct net *net)
+{
+ struct mptcp_mib __percpu *mib = alloc_percpu(struct mptcp_mib);
+
+ if (!mib)
+ return false;
+
+ if (cmpxchg(&net->mib.mptcp_statistics, NULL, mib))
+ free_percpu(mib);
+
+ return true;
+}
+
+void mptcp_seq_show(struct seq_file *seq)
+{
+ unsigned long sum[ARRAY_SIZE(mptcp_snmp_list) - 1];
+ struct net *net = seq->private;
+ int i;
+
+ seq_puts(seq, "MPTcpExt:");
+ for (i = 0; mptcp_snmp_list[i].name; i++)
+ seq_printf(seq, " %s", mptcp_snmp_list[i].name);
+
+ seq_puts(seq, "\nMPTcpExt:");
+
+ memset(sum, 0, sizeof(sum));
+ if (net->mib.mptcp_statistics)
+ snmp_get_cpu_field_batch(sum, mptcp_snmp_list,
+ net->mib.mptcp_statistics);
+
+ for (i = 0; mptcp_snmp_list[i].name; i++)
+ seq_printf(seq, " %lu", sum[i]);
+
+ seq_putc(seq, '\n');
+}