On Fri, 2020-10-09 at 14:35 +0000, Henrik Bjoernlund wrote: > This is the first commit of the implementation of the CFM protocol > according to 802.1Q section 12.14. > > It contains MEP instance create, delete and configuration. > > Connectivity Fault Management (CFM) comprises capabilities for > detecting, verifying, and isolating connectivity failures in > Virtual Bridged Networks. These capabilities can be used in > networks operated by multiple independent organizations, each > with restricted management access to each other<E2><80><99>s equipment. > > CFM functions are partitioned as follows: > - Path discovery > - Fault detection > - Fault verification and isolation > - Fault notification > - Fault recovery > > Interface consists of these functions: > br_cfm_mep_create() > br_cfm_mep_delete() > br_cfm_mep_config_set() > br_cfm_cc_config_set() > br_cfm_cc_peer_mep_add() > br_cfm_cc_peer_mep_remove() > > A MEP instance is created by br_cfm_mep_create() > -It is the Maintenance association End Point > described in 802.1Q section 19.2. > -It is created on a specific level (1-7) and is assuring > that no CFM frames are passing through this MEP on lower levels. > -It initiates and validates CFM frames on its level. > -It can only exist on a port that is related to a bridge. > -Attributes given cannot be changed until the instance is > deleted. > > A MEP instance can be deleted by br_cfm_mep_delete(). > > A created MEP instance has attributes that can be > configured by br_cfm_mep_config_set(). > > A MEP Continuity Check feature can be configured by > br_cfm_cc_config_set() > The Continuity Check Receiver state machine can be > enabled and disabled. > According to 802.1Q section 19.2.8 > > A MEP can have Peer MEPs added and removed by > br_cfm_cc_peer_mep_add() and br_cfm_cc_peer_mep_remove() > The Continuity Check feature can maintain connectivity > status on each added Peer MEP. > > Signed-off-by: Henrik Bjoernlund <henrik.bjoernlund@xxxxxxxxxxxxx> > Reviewed-by: Horatiu Vultur <horatiu.vultur@xxxxxxxxxxxxx> > --- > include/uapi/linux/cfm_bridge.h | 23 +++ > net/bridge/Makefile | 2 + > net/bridge/br_cfm.c | 278 ++++++++++++++++++++++++++++++++ > net/bridge/br_if.c | 1 + > net/bridge/br_private.h | 10 ++ > net/bridge/br_private_cfm.h | 61 +++++++ > 6 files changed, 375 insertions(+) > create mode 100644 include/uapi/linux/cfm_bridge.h > create mode 100644 net/bridge/br_cfm.c > create mode 100644 net/bridge/br_private_cfm.h > Acked-by: Nikolay Aleksandrov <nikolay@xxxxxxxxxx>
