From b6d0425b816eed4dbd6fc590b27dbc7a113c0248 Mon Sep 17 00:00:00 2001 From: Henrik Bjoernlund Date: Tue, 27 Oct 2020 10:02:51 +0000 Subject: bridge: cfm: Netlink Notifications. This is the implementation of Netlink notifications out of CFM. Notifications are initiated whenever a state change happens in CFM. 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. IFLA_BRIDGE_CFM_MEP_STATUS_INSTANCE: The MEP instance number of the delivered status. The type is NLA_U32. IFLA_BRIDGE_CFM_MEP_STATUS_OPCODE_UNEXP_SEEN: The MEP instance received CFM PDU with unexpected Opcode. The type is NLA_U32 (bool). IFLA_BRIDGE_CFM_MEP_STATUS_VERSION_UNEXP_SEEN: The MEP instance received CFM PDU with unexpected version. The type is NLA_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 NLA_U32 (bool). IFLA_BRIDGE_CFM_CC_PEER_STATUS_INSTANCE: The MEP instance number of the delivered status. The type is NLA_U32. IFLA_BRIDGE_CFM_CC_PEER_STATUS_PEER_MEPID: The added Peer MEP ID of the delivered status. The type is NLA_U32. IFLA_BRIDGE_CFM_CC_PEER_STATUS_CCM_DEFECT: The CCM defect status. The type is NLA_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 NLA_U32 (bool). IFLA_BRIDGE_CFM_CC_PEER_STATUS_PORT_TLV_VALUE: The last received CCM PDU Port Status TLV value field. The type is NLA_U8. IFLA_BRIDGE_CFM_CC_PEER_STATUS_IF_TLV_VALUE: The last received CCM PDU Interface Status TLV value field. The type is NLA_U8. IFLA_BRIDGE_CFM_CC_PEER_STATUS_SEEN: A CCM frame has been received from Peer MEP. The type is NLA_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 NLA_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 NLA_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 Reviewed-by: Horatiu Vultur Acked-by: Nikolay Aleksandrov Signed-off-by: Jakub Kicinski --- net/bridge/br_cfm_netlink.c | 25 ++++++++++++++++--------- 1 file changed, 16 insertions(+), 9 deletions(-) (limited to 'net/bridge/br_cfm_netlink.c') diff --git a/net/bridge/br_cfm_netlink.c b/net/bridge/br_cfm_netlink.c index c8b5ff0825a3..5c4c369f8536 100644 --- a/net/bridge/br_cfm_netlink.c +++ b/net/bridge/br_cfm_netlink.c @@ -613,7 +613,9 @@ nla_info_failure: return -EMSGSIZE; } -int br_cfm_status_fill_info(struct sk_buff *skb, struct net_bridge *br) +int br_cfm_status_fill_info(struct sk_buff *skb, + struct net_bridge *br, + bool getlink) { struct br_cfm_peer_mep *peer_mep; struct br_cfm_mep *mep; @@ -643,10 +645,13 @@ int br_cfm_status_fill_info(struct sk_buff *skb, struct net_bridge *br) mep->status.rx_level_low_seen)) goto nla_put_failure; - /* Clear all 'seen' indications */ - mep->status.opcode_unexp_seen = false; - mep->status.version_unexp_seen = false; - mep->status.rx_level_low_seen = false; + /* Only clear if this is a GETLINK */ + if (getlink) { + /* Clear all 'seen' indications */ + mep->status.opcode_unexp_seen = false; + mep->status.version_unexp_seen = false; + mep->status.rx_level_low_seen = false; + } nla_nest_end(skb, tb); @@ -700,10 +705,12 @@ int br_cfm_status_fill_info(struct sk_buff *skb, struct net_bridge *br) peer_mep->cc_status.seq_unexp_seen)) goto nla_put_failure; - /* Clear all 'seen' indications */ - peer_mep->cc_status.seen = false; - peer_mep->cc_status.tlv_seen = false; - peer_mep->cc_status.seq_unexp_seen = false; + if (getlink) { /* Only clear if this is a GETLINK */ + /* Clear all 'seen' indications */ + peer_mep->cc_status.seen = false; + peer_mep->cc_status.tlv_seen = false; + peer_mep->cc_status.seq_unexp_seen = false; + } nla_nest_end(skb, tb); } -- cgit v1.2.3