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authorIdo Schimmel <idosch@nvidia.com>2021-03-11 21:03:15 +0300
committerDavid S. Miller <davem@davemloft.net>2021-03-12 03:12:59 +0300
commit710ec5622306de8c071637ee41ddf4c9bd17e75a (patch)
treea161da8dc1f2c92b1230de76b57621105f838ef0 /include/uapi/linux/rtnetlink.h
parent90e1a9e21326887fe0aef6c25ad36464953a961e (diff)
downloadlinux-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.h7
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)
};