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| author |   Amit Cohen <amitc@mellanox.com> | 2019-11-07 18:42:14 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-11-07 19:51:40 -0800 |
| commit | 3b063ae57bdfec5e574ace440e6c3f34c4115a92 (patch) | |
| tree | dee48d3e5b30c2df1b8781e78c32f1ecf044e80e /Documentation | |
| parent | selftests: mlxsw: Add test cases for devlink-trap layer 3 drops (diff) | |
| download | linux-dev-3b063ae57bdfec5e574ace440e6c3f34c4115a92.tar.xz linux-dev-3b063ae57bdfec5e574ace440e6c3f34c4115a92.zip | |
devlink: Add layer 3 generic packet exception traps
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>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/networking/devlink-trap.rst | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Documentation/networking/devlink-trap.rst b/Documentation/networking/devlink-trap.rst index dc3dc87217c9..dc9659ca06fa 100644 --- a/Documentation/networking/devlink-trap.rst +++ b/Documentation/networking/devlink-trap.rst @@ -203,6 +203,26 @@ be added to the following table: - Traps IPv6 packets that the device decided to drop because they need to be routed and their IPv6 multicast destination IP has an interface-local scope (i.e., ffx1::/16) + * - ``mtu_value_is_too_small`` + - ``exception`` + - Traps packets that should have been routed by the device, but were bigger + than the MTU of the egress interface + * - ``unresolved_neigh`` + - ``exception`` + - Traps packets that did not have a matching IP neighbour after routing + * - ``mc_reverse_path_forwarding`` + - ``exception`` + - Traps multicast IP packets that failed reverse-path forwarding (RPF) + check during multicast routing + * - ``reject_route`` + - ``exception`` + - Traps packets that hit reject routes (i.e., "unreachable", "prohibit") + * - ``ipv4_lpm_miss`` + - ``exception`` + - Traps unicast IPv4 packets that did not match any route + * - ``ipv6_lpm_miss`` + - ``exception`` + - Traps unicast IPv6 packets that did not match any route Driver-specific Packet Traps ============================ |