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devlink: Add layer 3 generic packet exception traps

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Add layer 3 generic packet exception traps that can report trapped
packets and documentation of the traps.

Unlike drop traps, these exception traps also need to inject the packet
to the kernel's receive path. For example, a packet that was trapped due
to unreachable neighbour need to be injected into the kernel so that it
will trigger an ARP request or a neighbour solicitation message.

Signed-off-by: Amit Cohen <amitc@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Amit Cohen
2019-11-07 18:42:14 +02:00
committed by David S. Miller
parent d3e985c917
commit 3b063ae57b
3 changed files with 44 additions and 0 deletions
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6
net/core/devlink.c
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@@ -7611,6 +7611,12 @@ static const struct devlink_trap devlink_trap_generic[] = {
DEVLINK_TRAP(IPV4_SIP_BC, DROP),
DEVLINK_TRAP(IPV6_MC_DIP_RESERVED_SCOPE, DROP),
DEVLINK_TRAP(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, DROP),
DEVLINK_TRAP(MTU_ERROR, EXCEPTION),
DEVLINK_TRAP(UNRESOLVED_NEIGH, EXCEPTION),
DEVLINK_TRAP(RPF, EXCEPTION),
DEVLINK_TRAP(REJECT_ROUTE, EXCEPTION),
DEVLINK_TRAP(IPV4_LPM_UNICAST_MISS, EXCEPTION),
DEVLINK_TRAP(IPV6_LPM_UNICAST_MISS, EXCEPTION),
};
#define DEVLINK_TRAP_GROUP(_id) \