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bridge: mrp: Add support for role MRA

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A node that has the MRA role, it can behave as MRM or MRC.

Initially it starts as MRM and sends MRP_Test frames on both ring ports.
If it detects that there are MRP_Test send by another MRM, then it
checks if these frames have a lower priority than itself. In this case
it would send MRP_Nack frames to notify the other node that it needs to
stop sending MRP_Test frames.
If it receives a MRP_Nack frame then it stops sending MRP_Test frames
and starts to behave as a MRC but it would continue to monitor the
MRP_Test frames send by MRM. If at a point the MRM stops to send
MRP_Test frames it would get the MRM role and start to send MRP_Test
frames.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Horatiu Vultur 2020-05-30 18:09:48 +00:00 • committed by David S. Miller
parent 4b3a61b030
commit c6676e7d62
7 changed files with 157 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

38
include/uapi/linux/mrp_bridge.h
View file

@ -11,11 +11,14 @@
#define MRP_DOMAIN_UUID_LENGTH 16
#define MRP_VERSION 1
#define MRP_FRAME_PRIO 7
#define MRP_OUI_LENGTH 3
#define MRP_MANUFACTURE_DATA_LENGTH 2
enum br_mrp_ring_role_type {
BR_MRP_RING_ROLE_DISABLED,
BR_MRP_RING_ROLE_MRC,
BR_MRP_RING_ROLE_MRM,
BR_MRP_RING_ROLE_MRA,
};
enum br_mrp_ring_state_type {
@ -43,6 +46,13 @@ enum br_mrp_tlv_header_type {
BR_MRP_TLV_HEADER_RING_TOPO = 0x3,
BR_MRP_TLV_HEADER_RING_LINK_DOWN = 0x4,
BR_MRP_TLV_HEADER_RING_LINK_UP = 0x5,
BR_MRP_TLV_HEADER_OPTION = 0x7f,
};
enum br_mrp_sub_tlv_header_type {
BR_MRP_SUB_TLV_HEADER_TEST_MGR_NACK = 0x1,
BR_MRP_SUB_TLV_HEADER_TEST_PROPAGATE = 0x2,
BR_MRP_SUB_TLV_HEADER_TEST_AUTO_MGR = 0x3,
};
struct br_mrp_tlv_hdr {
@ -50,6 +60,11 @@ struct br_mrp_tlv_hdr {
__u8 length;
};
struct br_mrp_sub_tlv_hdr {
__u8 type;
__u8 length;
};
struct br_mrp_end_hdr {
struct br_mrp_tlv_hdr hdr;
};
@ -81,4 +96,27 @@ struct br_mrp_ring_link_hdr {
__be16 blocked;
};
struct br_mrp_sub_opt_hdr {
__u8 type;
__u8 manufacture_data[MRP_MANUFACTURE_DATA_LENGTH];
};
struct br_mrp_test_mgr_nack_hdr {
__be16 prio;
__u8 sa[ETH_ALEN];
__be16 other_prio;
__u8 other_sa[ETH_ALEN];
};
struct br_mrp_test_prop_hdr {
__be16 prio;
__u8 sa[ETH_ALEN];
__be16 other_prio;
__u8 other_sa[ETH_ALEN];
};
struct br_mrp_oui_hdr {
__u8 oui[MRP_OUI_LENGTH];
};
#endif