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

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

Functionality is extended with CCM frame transmission.

Interface is extended with these functions:
br_cfm_cc_rdi_set()
br_cfm_cc_ccm_tx()
br_cfm_cc_config_set()

A MEP Continuity Check feature can be configured by
br_cfm_cc_config_set()
    The Continuity Check parameters can be configured to be used when
    transmitting CCM.

A MEP can be configured to start or stop transmission of CCM frames by
br_cfm_cc_ccm_tx()
    The CCM will be transmitted for a selected period in seconds.
    Must call this function before timeout to keep transmission alive.

A MEP transmitting CCM can be configured with inserted RDI in PDU by
br_cfm_cc_rdi_set()

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 10:02:46 +00:00
committed by Jakub Kicinski
parent 86a14b79e1
commit a806ad8ee2
3 changed files with 377 additions and 1 deletions
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39
include/uapi/linux/cfm_bridge.h
View File

@@ -6,7 +6,32 @@
#include <linux/types.h>
#include <linux/if_ether.h>
#define CFM_MAID_LENGTH 48
#define ETHER_HEADER_LENGTH (6+6+4+2)
#define CFM_MAID_LENGTH 48
#define CFM_CCM_PDU_LENGTH 75
#define CFM_PORT_STATUS_TLV_LENGTH 4
#define CFM_IF_STATUS_TLV_LENGTH 4
#define CFM_IF_STATUS_TLV_TYPE 4
#define CFM_PORT_STATUS_TLV_TYPE 2
#define CFM_ENDE_TLV_TYPE 0
#define CFM_CCM_MAX_FRAME_LENGTH (ETHER_HEADER_LENGTH+\
CFM_CCM_PDU_LENGTH+\
CFM_PORT_STATUS_TLV_LENGTH+\
CFM_IF_STATUS_TLV_LENGTH)
#define CFM_FRAME_PRIO 7
#define CFM_CCM_TLV_OFFSET 70
#define CFM_CCM_ITU_RESERVED_SIZE 16
struct br_cfm_common_hdr {
__u8 mdlevel_version;
__u8 opcode;
__u8 flags;
__u8 tlv_offset;
};
enum br_cfm_opcodes {
BR_CFM_OPCODE_CCM = 0x1,
};
/* MEP domain */
enum br_cfm_domain {
@@ -20,4 +45,16 @@ enum br_cfm_mep_direction {
BR_CFM_MEP_DIRECTION_UP,
};
/* CCM interval supported. */
enum br_cfm_ccm_interval {
BR_CFM_CCM_INTERVAL_NONE,
BR_CFM_CCM_INTERVAL_3_3_MS,
BR_CFM_CCM_INTERVAL_10_MS,
BR_CFM_CCM_INTERVAL_100_MS,
BR_CFM_CCM_INTERVAL_1_SEC,
BR_CFM_CCM_INTERVAL_10_SEC,
BR_CFM_CCM_INTERVAL_1_MIN,
BR_CFM_CCM_INTERVAL_10_MIN,
};
#endif