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ipv6: Allow routes to use nexthop objects

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Add support for RTA_NH_ID attribute to allow a user to specify a
nexthop id to use with a route. fc_nh_id is added to fib6_config to
hold the value passed in the RTA_NH_ID attribute. If a nexthop id
is given, the gateway, device, encap and multipath attributes can
not be set.

Update ip6_route_del to check metric and protocol before nexthop
specs. If fc_nh_id is set, then it must match the id in the route
entry. Since IPv6 allows delete of a cached entry (an exception),
add ip6_del_cached_rt_nh to cycle through all of the fib6_nh in
a fib entry if it is using a nexthop.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern
2019-06-08 14:53:34 -07:00
committed by David S. Miller
parent 6c48ea5fe6
commit 5b98324ebe
2 changed files with 82 additions and 8 deletions
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1
include/net/ip6_fib.h
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@@ -49,6 +49,7 @@ struct fib6_config {
u16 fc_delete_all_nh : 1,
fc_ignore_dev_down:1,
__unused : 14;
u32 fc_nh_id;
struct in6_addr fc_dst;
struct in6_addr fc_src;