1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 
3 enum 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_INFINITEMAPTX,	/* Sent an infinite mapping */
21 	MPTCP_MIB_INFINITEMAPRX,	/* Received an infinite mapping */
22 	MPTCP_MIB_DSSTCPMISMATCH,	/* DSS-mapping did not map with TCP's sequence numbers */
23 	MPTCP_MIB_DATACSUMERR,		/* The data checksum fail */
24 	MPTCP_MIB_OFOQUEUETAIL,	/* Segments inserted into OoO queue tail */
25 	MPTCP_MIB_OFOQUEUE,		/* Segments inserted into OoO queue */
26 	MPTCP_MIB_OFOMERGE,		/* Segments merged in OoO queue */
27 	MPTCP_MIB_NODSSWINDOW,		/* Segments not in MPTCP windows */
28 	MPTCP_MIB_DUPDATA,		/* Segments discarded due to duplicate DSS */
29 	MPTCP_MIB_ADDADDR,		/* Received ADD_ADDR with echo-flag=0 */
30 	MPTCP_MIB_ECHOADD,		/* Received ADD_ADDR with echo-flag=1 */
31 	MPTCP_MIB_PORTADD,		/* Received ADD_ADDR with a port-number */
32 	MPTCP_MIB_ADDADDRDROP,		/* Dropped incoming ADD_ADDR */
33 	MPTCP_MIB_JOINPORTSYNRX,	/* Received a SYN MP_JOIN with a different port-number */
34 	MPTCP_MIB_JOINPORTSYNACKRX,	/* Received a SYNACK MP_JOIN with a different port-number */
35 	MPTCP_MIB_JOINPORTACKRX,	/* Received an ACK MP_JOIN with a different port-number */
36 	MPTCP_MIB_MISMATCHPORTSYNRX,	/* Received a SYN MP_JOIN with a mismatched port-number */
37 	MPTCP_MIB_MISMATCHPORTACKRX,	/* Received an ACK MP_JOIN with a mismatched port-number */
38 	MPTCP_MIB_RMADDR,		/* Received RM_ADDR */
39 	MPTCP_MIB_RMADDRDROP,		/* Dropped incoming RM_ADDR */
40 	MPTCP_MIB_RMSUBFLOW,		/* Remove a subflow */
41 	MPTCP_MIB_MPPRIOTX,		/* Transmit a MP_PRIO */
42 	MPTCP_MIB_MPPRIORX,		/* Received a MP_PRIO */
43 	MPTCP_MIB_MPFAILTX,		/* Transmit a MP_FAIL */
44 	MPTCP_MIB_MPFAILRX,		/* Received a MP_FAIL */
45 	MPTCP_MIB_MPFASTCLOSETX,	/* Transmit a MP_FASTCLOSE */
46 	MPTCP_MIB_MPFASTCLOSERX,	/* Received a MP_FASTCLOSE */
47 	MPTCP_MIB_MPRSTTX,		/* Transmit a MP_RST */
48 	MPTCP_MIB_MPRSTRX,		/* Received a MP_RST */
49 	MPTCP_MIB_RCVPRUNED,		/* Incoming packet dropped due to memory limit */
50 	MPTCP_MIB_SUBFLOWSTALE,		/* Subflows entered 'stale' status */
51 	MPTCP_MIB_SUBFLOWRECOVER,	/* Subflows returned to active status after being stale */
52 	MPTCP_MIB_SNDWNDSHARED,		/* Subflow snd wnd is overridden by msk's one */
53 	MPTCP_MIB_RCVWNDSHARED,		/* Subflow rcv wnd is overridden by msk's one */
54 	MPTCP_MIB_RCVWNDCONFLICTUPDATE,	/* subflow rcv wnd is overridden by msk's one due to
55 					 * conflict with another subflow while updating msk rcv wnd
56 					 */
57 	MPTCP_MIB_RCVWNDCONFLICT,	/* Conflict with while updating msk rcv wnd */
58 	__MPTCP_MIB_MAX
59 };
60 
61 #define LINUX_MIB_MPTCP_MAX	__MPTCP_MIB_MAX
62 struct mptcp_mib {
63 	unsigned long mibs[LINUX_MIB_MPTCP_MAX];
64 };
65 
MPTCP_INC_STATS(struct net * net,enum linux_mptcp_mib_field field)66 static inline void MPTCP_INC_STATS(struct net *net,
67 				   enum linux_mptcp_mib_field field)
68 {
69 	if (likely(net->mib.mptcp_statistics))
70 		SNMP_INC_STATS(net->mib.mptcp_statistics, field);
71 }
72 
__MPTCP_INC_STATS(struct net * net,enum linux_mptcp_mib_field field)73 static inline void __MPTCP_INC_STATS(struct net *net,
74 				     enum linux_mptcp_mib_field field)
75 {
76 	if (likely(net->mib.mptcp_statistics))
77 		__SNMP_INC_STATS(net->mib.mptcp_statistics, field);
78 }
79 
80 bool mptcp_mib_alloc(struct net *net);
81