net/mptcp/mib.h

   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_ADDADDRTX,            /* Sent ADD_ADDR with echo-flag=0 */
  31         MPTCP_MIB_ADDADDRTXDROP,        /* ADD_ADDR with echo-flag=0 not send due to
  32                                          * resource exhaustion
  33                                          */
  34         MPTCP_MIB_ECHOADD,              /* Received ADD_ADDR with echo-flag=1 */
  35         MPTCP_MIB_ECHOADDTX,            /* Send ADD_ADDR with echo-flag=1 */
  36         MPTCP_MIB_ECHOADDTXDROP,        /* ADD_ADDR with echo-flag=1 not send due
  37                                          * to resource exhaustion
  38                                          */
  39         MPTCP_MIB_PORTADD,              /* Received ADD_ADDR with a port-number */
  40         MPTCP_MIB_ADDADDRDROP,          /* Dropped incoming ADD_ADDR */
  41         MPTCP_MIB_JOINPORTSYNRX,        /* Received a SYN MP_JOIN with a different port-number */
  42         MPTCP_MIB_JOINPORTSYNACKRX,     /* Received a SYNACK MP_JOIN with a different port-number */
  43         MPTCP_MIB_JOINPORTACKRX,        /* Received an ACK MP_JOIN with a different port-number */
  44         MPTCP_MIB_MISMATCHPORTSYNRX,    /* Received a SYN MP_JOIN with a mismatched port-number */
  45         MPTCP_MIB_MISMATCHPORTACKRX,    /* Received an ACK MP_JOIN with a mismatched port-number */
  46         MPTCP_MIB_RMADDR,               /* Received RM_ADDR */
  47         MPTCP_MIB_RMADDRDROP,           /* Dropped incoming RM_ADDR */
  48         MPTCP_MIB_RMADDRTX,             /* Sent RM_ADDR */
  49         MPTCP_MIB_RMADDRTXDROP,         /* RM_ADDR not sent due to resource exhaustion */
  50         MPTCP_MIB_RMSUBFLOW,            /* Remove a subflow */
  51         MPTCP_MIB_MPPRIOTX,             /* Transmit a MP_PRIO */
  52         MPTCP_MIB_MPPRIORX,             /* Received a MP_PRIO */
  53         MPTCP_MIB_MPFAILTX,             /* Transmit a MP_FAIL */
  54         MPTCP_MIB_MPFAILRX,             /* Received a MP_FAIL */
  55         MPTCP_MIB_MPFASTCLOSETX,        /* Transmit a MP_FASTCLOSE */
  56         MPTCP_MIB_MPFASTCLOSERX,        /* Received a MP_FASTCLOSE */
  57         MPTCP_MIB_MPRSTTX,              /* Transmit a MP_RST */
  58         MPTCP_MIB_MPRSTRX,              /* Received a MP_RST */
  59         MPTCP_MIB_RCVPRUNED,            /* Incoming packet dropped due to memory limit */
  60         MPTCP_MIB_SUBFLOWSTALE,         /* Subflows entered 'stale' status */
  61         MPTCP_MIB_SUBFLOWRECOVER,       /* Subflows returned to active status after being stale */
  62         MPTCP_MIB_SNDWNDSHARED,         /* Subflow snd wnd is overridden by msk's one */
  63         MPTCP_MIB_RCVWNDSHARED,         /* Subflow rcv wnd is overridden by msk's one */
  64         MPTCP_MIB_RCVWNDCONFLICTUPDATE, /* subflow rcv wnd is overridden by msk's one due to
  65                                          * conflict with another subflow while updating msk rcv wnd
  66                                          */
  67         MPTCP_MIB_RCVWNDCONFLICT,       /* Conflict with while updating msk rcv wnd */
  68         __MPTCP_MIB_MAX
  69 };
  70
  71 #define LINUX_MIB_MPTCP_MAX     __MPTCP_MIB_MAX
  72 struct mptcp_mib {
  73         unsigned long mibs[LINUX_MIB_MPTCP_MAX];
  74 };
  75
  76 static inline void MPTCP_ADD_STATS(struct net *net,
  77                                    enum linux_mptcp_mib_field field,
  78                                    int val)
  79 {
  80         if (likely(net->mib.mptcp_statistics))
  81                 SNMP_ADD_STATS(net->mib.mptcp_statistics, field, val);
  82 }
  83
  84 static inline void MPTCP_INC_STATS(struct net *net,
  85                                    enum linux_mptcp_mib_field field)
  86 {
  87         if (likely(net->mib.mptcp_statistics))
  88                 SNMP_INC_STATS(net->mib.mptcp_statistics, field);
  89 }
  90
  91 static inline void __MPTCP_INC_STATS(struct net *net,
  92                                      enum linux_mptcp_mib_field field)
  93 {
  94         if (likely(net->mib.mptcp_statistics))
  95                 __SNMP_INC_STATS(net->mib.mptcp_statistics, field);
  96 }
  97
  98 bool mptcp_mib_alloc(struct net *net);