nexthop: Emit a notification when a nexthop is added

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Emit a notification in the nexthop notification chain when a new nexthop
is added (not replaced). The nexthop can either be a new group or a
single nexthop.

The notification is sent after the nexthop is inserted into the
red-black tree, as listeners might need to callback into the nexthop
code with the nexthop ID in order to mark the nexthop as offloaded.

A 'REPLACE' notification is emitted instead of 'ADD' as the distinction
between the two is not important for in-kernel listeners. In case the
listener is not familiar with the encoded nexthop ID, it can simply
treat it as a new one. This is also consistent with the route offload
API.

Changes since RFC:
* Reword commit message

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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This commit is contained in:

Ido Schimmel 2020-11-04 15:30:29 +02:00 • committed by Jakub Kicinski

parent e95f2592f6

commit 732d167bf5

2 changed files with 7 additions and 2 deletions

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3

include/net/nexthop.h

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6

net/ipv4/nexthop.c

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