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bridge: cfm: Kernel space implementation of CFM. CCM frame RX added.

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This is the third commit of the implementation of the CFM protocol
according to 802.1Q section 12.14.

Functionality is extended with CCM frame reception.
The MEP instance now contains CCM based status information.
Most important is the CCM defect status indicating if correct
CCM frames are received with the expected interval.

Signed-off-by: Henrik Bjoernlund  <henrik.bjoernlund@microchip.com>
Reviewed-by: Horatiu Vultur  <horatiu.vultur@microchip.com>
Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Henrik Bjoernlund
2020-10-27 10:02:47 +00:00
committed by Jakub Kicinski
parent a806ad8ee2
commit dc32cbb3db
3 changed files with 305 additions and 0 deletions
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4
include/uapi/linux/cfm_bridge.h
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@@ -20,6 +20,10 @@
CFM_IF_STATUS_TLV_LENGTH)
#define CFM_FRAME_PRIO 7
#define CFM_CCM_TLV_OFFSET 70
#define CFM_CCM_PDU_MAID_OFFSET 10
#define CFM_CCM_PDU_MEPID_OFFSET 8
#define CFM_CCM_PDU_SEQNR_OFFSET 4
#define CFM_CCM_PDU_TLV_OFFSET 74
#define CFM_CCM_ITU_RESERVED_SIZE 16
struct br_cfm_common_hdr {