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_MPCAPABLEACTIVE,	/* Sent SYN with MP_CAPABLE */
 7	MPTCP_MIB_MPCAPABLEACTIVEACK,	/* Received SYN/ACK with MP_CAPABLE */
 8	MPTCP_MIB_MPCAPABLEPASSIVEACK,	/* Received third ACK with MP_CAPABLE */
 9	MPTCP_MIB_MPCAPABLEPASSIVEFALLBACK,/* Server-side fallback during 3-way handshake */
10	MPTCP_MIB_MPCAPABLEACTIVEFALLBACK, /* Client-side fallback during 3-way handshake */
11	MPTCP_MIB_TOKENFALLBACKINIT,	/* Could not init/allocate token */
12	MPTCP_MIB_RETRANSSEGS,		/* Segments retransmitted at the MPTCP-level */
13	MPTCP_MIB_JOINNOTOKEN,		/* Received MP_JOIN but the token was not found */
14	MPTCP_MIB_JOINSYNRX,		/* Received a SYN + MP_JOIN */
15	MPTCP_MIB_JOINSYNACKRX,		/* Received a SYN/ACK + MP_JOIN */
16	MPTCP_MIB_JOINSYNACKMAC,	/* HMAC was wrong on SYN/ACK + MP_JOIN */
17	MPTCP_MIB_JOINACKRX,		/* Received an ACK + MP_JOIN */
18	MPTCP_MIB_JOINACKMAC,		/* HMAC was wrong on ACK + MP_JOIN */
19	MPTCP_MIB_DSSNOMATCH,		/* Received a new mapping that did not match the previous one */
20	MPTCP_MIB_INFINITEMAPRX,	/* Received an infinite mapping */
21	MPTCP_MIB_DSSTCPMISMATCH,	/* DSS-mapping did not map with TCP's sequence numbers */
22	MPTCP_MIB_DATACSUMERR,		/* The data checksum fail */
23	MPTCP_MIB_OFOQUEUETAIL,	/* Segments inserted into OoO queue tail */
24	MPTCP_MIB_OFOQUEUE,		/* Segments inserted into OoO queue */
25	MPTCP_MIB_OFOMERGE,		/* Segments merged in OoO queue */
26	MPTCP_MIB_NODSSWINDOW,		/* Segments not in MPTCP windows */
27	MPTCP_MIB_DUPDATA,		/* Segments discarded due to duplicate DSS */
28	MPTCP_MIB_ADDADDR,		/* Received ADD_ADDR with echo-flag=0 */
29	MPTCP_MIB_ECHOADD,		/* Received ADD_ADDR with echo-flag=1 */
30	MPTCP_MIB_PORTADD,		/* Received ADD_ADDR with a port-number */
31	MPTCP_MIB_JOINPORTSYNRX,	/* Received a SYN MP_JOIN with a different port-number */
32	MPTCP_MIB_JOINPORTSYNACKRX,	/* Received a SYNACK MP_JOIN with a different port-number */
33	MPTCP_MIB_JOINPORTACKRX,	/* Received an ACK MP_JOIN with a different port-number */
34	MPTCP_MIB_MISMATCHPORTSYNRX,	/* Received a SYN MP_JOIN with a mismatched port-number */
35	MPTCP_MIB_MISMATCHPORTACKRX,	/* Received an ACK MP_JOIN with a mismatched port-number */
36	MPTCP_MIB_RMADDR,		/* Received RM_ADDR */
37	MPTCP_MIB_RMSUBFLOW,		/* Remove a subflow */
38	MPTCP_MIB_MPPRIOTX,		/* Transmit a MP_PRIO */
39	MPTCP_MIB_MPPRIORX,		/* Received a MP_PRIO */
40	MPTCP_MIB_RCVPRUNED,		/* Incoming packet dropped due to memory limit */
41	__MPTCP_MIB_MAX
42};
43
44#define LINUX_MIB_MPTCP_MAX	__MPTCP_MIB_MAX
45struct mptcp_mib {
46	unsigned long mibs[LINUX_MIB_MPTCP_MAX];
47};
48
49static inline void MPTCP_INC_STATS(struct net *net,
50				   enum linux_mptcp_mib_field field)
51{
52	if (likely(net->mib.mptcp_statistics))
53		SNMP_INC_STATS(net->mib.mptcp_statistics, field);
54}
55
56static inline void __MPTCP_INC_STATS(struct net *net,
57				     enum linux_mptcp_mib_field field)
58{
59	if (likely(net->mib.mptcp_statistics))
60		__SNMP_INC_STATS(net->mib.mptcp_statistics, field);
61}
62
63bool mptcp_mib_alloc(struct net *net);