mlxsw: spectrum: Add packet traps for BFD packets
authorIdo Schimmel <idosch@mellanox.com>
Mon, 25 May 2020 23:05:55 +0000 (02:05 +0300)
committerDavid S. Miller <davem@davemloft.net>
Wed, 27 May 2020 03:33:58 +0000 (20:33 -0700)
commit9785b92b4443f2862495c9aa0ee8caed6f43523d
tree64e01ee5343b3f823b040e1e81a947d21e8afbde
parentdacc4e3acf542ce4c8a6dcc1a350decb443cf7f3
mlxsw: spectrum: Add packet traps for BFD packets

Bidirectional Forwarding Detection (BFD) provides "low-overhead,
short-duration detection of failures in the path between adjacent
forwarding engines" (RFC 5880).

This is accomplished by exchanging BFD packets between the two
forwarding engines. Up until now these packets were trapped via the
general local delivery (i.e., IP2ME) trap which also traps a lot of
other packets that are not as time-sensitive as BFD packets.

Expose dedicated traps for BFD packets so that user space could
configure a dedicated policer for them.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/mellanox/mlxsw/reg.h
drivers/net/ethernet/mellanox/mlxsw/spectrum.c
drivers/net/ethernet/mellanox/mlxsw/trap.h