net/bridge/br_private_cfm.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #ifndef _BR_PRIVATE_CFM_H_
   4 #define _BR_PRIVATE_CFM_H_
   5
   6 #include "br_private.h"
   7 #include <uapi/linux/cfm_bridge.h>
   8
   9 struct br_cfm_mep_create {
  10         enum br_cfm_domain domain; /* Domain for this MEP */
  11         enum br_cfm_mep_direction direction; /* Up or Down MEP direction */
  12         u32 ifindex; /* Residence port */
  13 };
  14
  15 int br_cfm_mep_create(struct net_bridge *br,
  16                       const u32 instance,
  17                       struct br_cfm_mep_create *const create,
  18                       struct netlink_ext_ack *extack);
  19
  20 int br_cfm_mep_delete(struct net_bridge *br,
  21                       const u32 instance,
  22                       struct netlink_ext_ack *extack);
  23
  24 struct br_cfm_mep_config {
  25         u32 mdlevel;
  26         u32 mepid; /* MEPID for this MEP */
  27         struct mac_addr unicast_mac; /* The MEP unicast MAC */
  28 };
  29
  30 int br_cfm_mep_config_set(struct net_bridge *br,
  31                           const u32 instance,
  32                           const struct br_cfm_mep_config *const config,
  33                           struct netlink_ext_ack *extack);
  34
  35 struct br_cfm_maid {
  36         u8 data[CFM_MAID_LENGTH];
  37 };
  38
  39 struct br_cfm_cc_config {
  40         /* Expected received CCM PDU MAID. */
  41         struct br_cfm_maid exp_maid;
  42
  43         /* Expected received CCM PDU interval. */
  44         /* Transmitting CCM PDU interval when CCM tx is enabled. */
  45         enum br_cfm_ccm_interval exp_interval;
  46
  47         bool enable; /* Enable/disable CCM PDU handling */
  48 };
  49
  50 int br_cfm_cc_config_set(struct net_bridge *br,
  51                          const u32 instance,
  52                          const struct br_cfm_cc_config *const config,
  53                          struct netlink_ext_ack *extack);
  54
  55 int br_cfm_cc_peer_mep_add(struct net_bridge *br, const u32 instance,
  56                            u32 peer_mep_id,
  57                            struct netlink_ext_ack *extack);
  58 int br_cfm_cc_peer_mep_remove(struct net_bridge *br, const u32 instance,
  59                               u32 peer_mep_id,
  60                               struct netlink_ext_ack *extack);
  61
  62 /* Transmitted CCM Remote Defect Indication status set.
  63  * This RDI is inserted in transmitted CCM PDUs if CCM transmission is enabled.
  64  * See br_cfm_cc_ccm_tx() with interval != BR_CFM_CCM_INTERVAL_NONE
  65  */
  66 int br_cfm_cc_rdi_set(struct net_bridge *br, const u32 instance,
  67                       const bool rdi, struct netlink_ext_ack *extack);
  68
  69 /* OAM PDU Tx information */
  70 struct br_cfm_cc_ccm_tx_info {
  71         struct mac_addr dmac;
  72         /* The CCM will be transmitted for this period in seconds.
  73          * Call br_cfm_cc_ccm_tx before timeout to keep transmission alive.
  74          * When period is zero any ongoing transmission will be stopped.
  75          */
  76         u32 period;
  77
  78         bool seq_no_update; /* Update Tx CCM sequence number */
  79         bool if_tlv; /* Insert Interface Status TLV */
  80         u8 if_tlv_value; /* Interface Status TLV value */
  81         bool port_tlv; /* Insert Port Status TLV */
  82         u8 port_tlv_value; /* Port Status TLV value */
  83         /* Sender ID TLV ??
  84          * Organization-Specific TLV ??
  85          */
  86 };
  87
  88 int br_cfm_cc_ccm_tx(struct net_bridge *br, const u32 instance,
  89                      const struct br_cfm_cc_ccm_tx_info *const tx_info,
  90                      struct netlink_ext_ack *extack);
  91
  92 struct br_cfm_mep_status {
  93         /* Indications that an OAM PDU has been seen. */
  94         bool opcode_unexp_seen; /* RX of OAM PDU with unexpected opcode */
  95         bool version_unexp_seen; /* RX of OAM PDU with unexpected version */
  96         bool rx_level_low_seen; /* Rx of OAM PDU with level low */
  97 };
  98
  99 struct br_cfm_cc_peer_status {
 100         /* This CCM related status is based on the latest received CCM PDU. */
 101         u8 port_tlv_value; /* Port Status TLV value */
 102         u8 if_tlv_value; /* Interface Status TLV value */
 103
 104         /* CCM has not been received for 3.25 intervals */
 105         u8 ccm_defect:1;
 106
 107         /* (RDI == 1) for last received CCM PDU */
 108         u8 rdi:1;
 109
 110         /* Indications that a CCM PDU has been seen. */
 111         u8 seen:1; /* CCM PDU received */
 112         u8 tlv_seen:1; /* CCM PDU with TLV received */
 113         /* CCM PDU with unexpected sequence number received */
 114         u8 seq_unexp_seen:1;
 115 };
 116
 117 struct br_cfm_mep {
 118         /* list header of MEP instances */
 119         struct hlist_node               head;
 120         u32                             instance;
 121         struct br_cfm_mep_create        create;
 122         struct br_cfm_mep_config        config;
 123         struct br_cfm_cc_config         cc_config;
 124         struct br_cfm_cc_ccm_tx_info    cc_ccm_tx_info;
 125         /* List of multiple peer MEPs */
 126         struct hlist_head               peer_mep_list;
 127         struct net_bridge_port __rcu    *b_port;
 128         unsigned long                   ccm_tx_end;
 129         struct delayed_work             ccm_tx_dwork;
 130         u32                             ccm_tx_snumber;
 131         u32                             ccm_rx_snumber;
 132         struct br_cfm_mep_status        status;
 133         bool                            rdi;
 134         struct rcu_head                 rcu;
 135 };
 136
 137 struct br_cfm_peer_mep {
 138         struct hlist_node               head;
 139         struct br_cfm_mep               *mep;
 140         struct delayed_work             ccm_rx_dwork;
 141         u32                             mepid;
 142         struct br_cfm_cc_peer_status    cc_status;
 143         u32                             ccm_rx_count_miss;
 144         struct rcu_head                 rcu;
 145 };
 146
 147 #endif /* _BR_PRIVATE_CFM_H_ */