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| author | Ido Schimmel <idosch@nvidia.com> | 2021-03-11 21:03:15 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-03-12 03:12:59 +0300 |
| commit | 710ec5622306de8c071637ee41ddf4c9bd17e75a (patch) | |
| tree | a161da8dc1f2c92b1230de76b57621105f838ef0 /include/uapi/linux/rtnetlink.h | |
| parent | 90e1a9e21326887fe0aef6c25ad36464953a961e (diff) | |
| download | linux-710ec5622306de8c071637ee41ddf4c9bd17e75a.tar.xz | |
nexthop: Add netlink defines and enumerators for resilient NH groups
- RTM_NEWNEXTHOP et.al. that handle resilient groups will have a new nested
attribute, NHA_RES_GROUP, whose elements are attributes NHA_RES_GROUP_*.
- RTM_NEWNEXTHOPBUCKET et.al. is a suite of new messages that will
currently serve only for dumping of individual buckets of resilient next
hop groups. For nexthop group buckets, these messages will carry a nested
attribute NHA_RES_BUCKET, whose elements are attributes NHA_RES_BUCKET_*.
There are several reasons why a new suite of messages is created for
nexthop buckets instead of overloading the information on the existing
RTM_{NEW,DEL,GET}NEXTHOP messages.
First, a nexthop group can contain a large number of nexthop buckets (4k
is not unheard of). This imposes limits on the amount of information that
can be encoded for each nexthop bucket given a netlink message is limited
to 64k bytes.
Second, while RTM_NEWNEXTHOPBUCKET is only used for notifications at
this point, in the future it can be extended to provide user space with
control over nexthop buckets configuration.
- The new group type is NEXTHOP_GRP_TYPE_RES. Note that nexthop code is
adjusted to bounce groups with that type for now.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/uapi/linux/rtnetlink.h')
| -rw-r--r-- | include/uapi/linux/rtnetlink.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h index 91e4ca064d61..d35953bc7d53 100644 --- a/include/uapi/linux/rtnetlink.h +++ b/include/uapi/linux/rtnetlink.h @@ -178,6 +178,13 @@ enum { RTM_GETVLAN, #define RTM_GETVLAN RTM_GETVLAN + RTM_NEWNEXTHOPBUCKET = 116, +#define RTM_NEWNEXTHOPBUCKET RTM_NEWNEXTHOPBUCKET + RTM_DELNEXTHOPBUCKET, +#define RTM_DELNEXTHOPBUCKET RTM_DELNEXTHOPBUCKET + RTM_GETNEXTHOPBUCKET, +#define RTM_GETNEXTHOPBUCKET RTM_GETNEXTHOPBUCKET + __RTM_MAX, #define RTM_MAX (((__RTM_MAX + 3) & ~3) - 1) }; |