1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2
 3enum linux_mptcp_mib_field {
 4	MPTCP_MIB_NUM = 0,
 5	MPTCP_MIB_MPCAPABLEPASSIVE,	/* Received SYN with MP_CAPABLE */
 6	MPTCP_MIB_MPCAPABLEPASSIVEACK,	/* Received third ACK with MP_CAPABLE */
 7	MPTCP_MIB_MPCAPABLEPASSIVEFALLBACK,/* Server-side fallback during 3-way handshake */
 8	MPTCP_MIB_MPCAPABLEACTIVEFALLBACK, /* Client-side fallback during 3-way handshake */
 9	MPTCP_MIB_RETRANSSEGS,		/* Segments retransmitted at the MPTCP-level */
10	MPTCP_MIB_JOINNOTOKEN,		/* Received MP_JOIN but the token was not found */
11	MPTCP_MIB_JOINSYNRX,		/* Received a SYN + MP_JOIN */
12	MPTCP_MIB_JOINSYNACKRX,		/* Received a SYN/ACK + MP_JOIN */
13	MPTCP_MIB_JOINSYNACKMAC,	/* HMAC was wrong on SYN/ACK + MP_JOIN */
14	MPTCP_MIB_JOINACKRX,		/* Received an ACK + MP_JOIN */
15	MPTCP_MIB_JOINACKMAC,		/* HMAC was wrong on ACK + MP_JOIN */
16	MPTCP_MIB_DSSNOMATCH,		/* Received a new mapping that did not match the previous one */
17	MPTCP_MIB_INFINITEMAPRX,	/* Received an infinite mapping */
18	__MPTCP_MIB_MAX
19};
20
21#define LINUX_MIB_MPTCP_MAX	__MPTCP_MIB_MAX
22struct mptcp_mib {
23	unsigned long mibs[LINUX_MIB_MPTCP_MAX];
24};
25
26static inline void MPTCP_INC_STATS(struct net *net,
27				   enum linux_mptcp_mib_field field)
28{
29	if (likely(net->mib.mptcp_statistics))
30		SNMP_INC_STATS(net->mib.mptcp_statistics, field);
31}
32
33static inline void __MPTCP_INC_STATS(struct net *net,
34				     enum linux_mptcp_mib_field field)
35{
36	if (likely(net->mib.mptcp_statistics))
37		__SNMP_INC_STATS(net->mib.mptcp_statistics, field);
38}
39
40bool mptcp_mib_alloc(struct net *net);