On Fri, 2020-10-09 at 14:35 +0000, Henrik Bjoernlund wrote:
> This is the implementation of CFM netlink status
> get information interface.
>
> Add new nested netlink attributes. These attributes are used by the
> user space to get status information.
>
> GETLINK:
> Request filter RTEXT_FILTER_CFM_STATUS:
> Indicating that CFM status information must be delivered.
>
> IFLA_BRIDGE_CFM:
> Points to the CFM information.
>
> IFLA_BRIDGE_CFM_MEP_STATUS_INFO:
> This indicate that the MEP instance status are following.
> IFLA_BRIDGE_CFM_CC_PEER_STATUS_INFO:
> This indicate that the peer MEP status are following.
>
> CFM nested attribute has the following attributes in next level.
>
> GETLINK RTEXT_FILTER_CFM_STATUS:
> IFLA_BRIDGE_CFM_MEP_STATUS_INSTANCE:
> The MEP instance number of the delivered status.
> The type is u32.
> IFLA_BRIDGE_CFM_MEP_STATUS_OPCODE_UNEXP_SEEN:
> The MEP instance received CFM PDU with unexpected Opcode.
> The type is u32 (bool).
> IFLA_BRIDGE_CFM_MEP_STATUS_VERSION_UNEXP_SEEN:
> The MEP instance received CFM PDU with unexpected version.
> The type is u32 (bool).
> IFLA_BRIDGE_CFM_MEP_STATUS_RX_LEVEL_LOW_SEEN:
> The MEP instance received CCM PDU with MD level lower than
> configured level. This frame is discarded.
> The type is u32 (bool).
>
> IFLA_BRIDGE_CFM_CC_PEER_STATUS_INSTANCE:
> The MEP instance number of the delivered status.
> The type is u32.
> IFLA_BRIDGE_CFM_CC_PEER_STATUS_PEER_MEPID:
> The added Peer MEP ID of the delivered status.
> The type is u32.
> IFLA_BRIDGE_CFM_CC_PEER_STATUS_CCM_DEFECT:
> The CCM defect status.
> The type is u32 (bool).
> True means no CCM frame is received for 3.25 intervals.
> IFLA_BRIDGE_CFM_CC_CONFIG_EXP_INTERVAL.
> IFLA_BRIDGE_CFM_CC_PEER_STATUS_RDI:
> The last received CCM PDU RDI.
> The type is u32 (bool).
> IFLA_BRIDGE_CFM_CC_PEER_STATUS_PORT_TLV_VALUE:
> The last received CCM PDU Port Status TLV value field.
> The type is u8.
> IFLA_BRIDGE_CFM_CC_PEER_STATUS_IF_TLV_VALUE:
> The last received CCM PDU Interface Status TLV value field.
> The type is u8.
> IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEEN:
> A CCM frame has been received from Peer MEP.
> The type is u32 (bool).
> This is cleared after GETLINK IFLA_BRIDGE_CFM_CC_PEER_STATUS_INFO.
> IFLA_BRIDGE_CFM_CC_PEER_STATUS_TLV_SEEN:
> A CCM frame with TLV has been received from Peer MEP.
> The type is u32 (bool).
> This is cleared after GETLINK IFLA_BRIDGE_CFM_CC_PEER_STATUS_INFO.
> IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEQ_UNEXP_SEEN:
> A CCM frame with unexpected sequence number has been received
> from Peer MEP.
> The type is u32 (bool).
> When a sequence number is not one higher than previously received
> then it is unexpected.
> This is cleared after GETLINK IFLA_BRIDGE_CFM_CC_PEER_STATUS_INFO.
>
> Signed-off-by: Henrik Bjoernlund <henrik.bjoernlund@xxxxxxxxxxxxx>
> Reviewed-by: Horatiu Vultur <horatiu.vultur@xxxxxxxxxxxxx>
> ---
> include/uapi/linux/if_bridge.h | 29 +++++++++
> include/uapi/linux/rtnetlink.h | 1 +
> net/bridge/br_cfm_netlink.c | 105 +++++++++++++++++++++++++++++++++
> net/bridge/br_netlink.c | 16 ++++-
> net/bridge/br_private.h | 6 ++
> 5 files changed, 154 insertions(+), 3 deletions(-)
>
[snip]
> diff --git a/net/bridge/br_cfm_netlink.c b/net/bridge/br_cfm_netlink.c
> index 952b6372874e..94e9b46d5fb4 100644
> --- a/net/bridge/br_cfm_netlink.c
> +++ b/net/bridge/br_cfm_netlink.c
> @@ -617,3 +617,108 @@ int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
> nla_info_failure:
> return -EMSGSIZE;
> }
> +
> +int br_cfm_status_fill_info(struct sk_buff *skb, struct net_bridge *br)
> +{
> + struct nlattr *tb;
> + struct br_cfm_mep *mep;
> + struct br_cfm_peer_mep *peer_mep;
> +
>
Reverse xmas tree here, too. Sorry I missed these earlier.
