Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <net/ip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <net/mptcp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <net/snmp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <net/net_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include "mib.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) static const struct snmp_mib mptcp_snmp_list[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	SNMP_MIB_ITEM("MPCapableSYNRX", MPTCP_MIB_MPCAPABLEPASSIVE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 	SNMP_MIB_ITEM("MPCapableACKRX", MPTCP_MIB_MPCAPABLEPASSIVEACK),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	SNMP_MIB_ITEM("MPCapableFallbackACK", MPTCP_MIB_MPCAPABLEPASSIVEFALLBACK),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	SNMP_MIB_ITEM("MPCapableFallbackSYNACK", MPTCP_MIB_MPCAPABLEACTIVEFALLBACK),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	SNMP_MIB_ITEM("MPTCPRetrans", MPTCP_MIB_RETRANSSEGS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	SNMP_MIB_ITEM("MPJoinNoTokenFound", MPTCP_MIB_JOINNOTOKEN),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	SNMP_MIB_ITEM("MPJoinSynRx", MPTCP_MIB_JOINSYNRX),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	SNMP_MIB_ITEM("MPJoinSynAckRx", MPTCP_MIB_JOINSYNACKRX),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	SNMP_MIB_ITEM("MPJoinSynAckHMacFailure", MPTCP_MIB_JOINSYNACKMAC),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	SNMP_MIB_ITEM("MPJoinAckRx", MPTCP_MIB_JOINACKRX),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	SNMP_MIB_ITEM("MPJoinAckHMacFailure", MPTCP_MIB_JOINACKMAC),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	SNMP_MIB_ITEM("DSSNotMatching", MPTCP_MIB_DSSNOMATCH),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	SNMP_MIB_ITEM("InfiniteMapRx", MPTCP_MIB_INFINITEMAPRX),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	SNMP_MIB_ITEM("OFOQueueTail", MPTCP_MIB_OFOQUEUETAIL),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	SNMP_MIB_ITEM("OFOQueue", MPTCP_MIB_OFOQUEUE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	SNMP_MIB_ITEM("OFOMerge", MPTCP_MIB_OFOMERGE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	SNMP_MIB_ITEM("NoDSSInWindow", MPTCP_MIB_NODSSWINDOW),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	SNMP_MIB_ITEM("DuplicateData", MPTCP_MIB_DUPDATA),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	SNMP_MIB_ITEM("AddAddr", MPTCP_MIB_ADDADDR),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	SNMP_MIB_ITEM("EchoAdd", MPTCP_MIB_ECHOADD),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	SNMP_MIB_ITEM("RmAddr", MPTCP_MIB_RMADDR),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	SNMP_MIB_ITEM("RmSubflow", MPTCP_MIB_RMSUBFLOW),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	SNMP_MIB_SENTINEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /* mptcp_mib_alloc - allocate percpu mib counters
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)  * These are allocated when the first mptcp socket is created so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)  * we do not waste percpu memory if mptcp isn't in use.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) bool mptcp_mib_alloc(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	struct mptcp_mib __percpu *mib = alloc_percpu(struct mptcp_mib);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	if (!mib)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	if (cmpxchg(&net->mib.mptcp_statistics, NULL, mib))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		free_percpu(mib);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) void mptcp_seq_show(struct seq_file *seq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	struct net *net = seq->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	seq_puts(seq, "MPTcpExt:");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	for (i = 0; mptcp_snmp_list[i].name; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 		seq_printf(seq, " %s", mptcp_snmp_list[i].name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	seq_puts(seq, "\nMPTcpExt:");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	if (!net->mib.mptcp_statistics) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 		for (i = 0; mptcp_snmp_list[i].name; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 			seq_puts(seq, " 0");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 		seq_putc(seq, '\n');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	for (i = 0; mptcp_snmp_list[i].name; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 		seq_printf(seq, " %lu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 			   snmp_fold_field(net->mib.mptcp_statistics,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 					   mptcp_snmp_list[i].entry));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 	seq_putc(seq, '\n');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }