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mlxsw: spectrum_router: Add support for IPv6 non-equal-cost multipath

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Since commit eb789980d0 ("mlxsw: spectrum_router: Populate adjacency
entries according to weights") the driver includes support for
non-equal-cost multipath, but IPv4 nexthops were the only user.

Now that the kernel supports weighted IPv6 nexthops, we can extend the
driver to support it as well.

This is done by assigning each nexthop its configured weight, so that it
will be populated accordingly in the device's adjacency table. The
`weight` parameter is also taken into account when comparing nexthop
groups in order not to consolidate non-identical groups.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2018-01-12 17:15:59 +01:00 committed by David S. Miller
parent 54f7bf7230
commit 3743d88ab4
1 changed files with 8 additions and 5 deletions
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13
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
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@ -2628,7 +2628,8 @@ struct mlxsw_sp_nexthop_group_cmp_arg {
static bool
mlxsw_sp_nexthop6_group_has_nexthop(const struct mlxsw_sp_nexthop_group *nh_grp,
const struct in6_addr *gw, int ifindex)
const struct in6_addr *gw, int ifindex,
int weight)
{
int i;
@ -2636,7 +2637,7 @@ mlxsw_sp_nexthop6_group_has_nexthop(const struct mlxsw_sp_nexthop_group *nh_grp,
const struct mlxsw_sp_nexthop *nh;
nh = &nh_grp->nexthops[i];
if (nh->ifindex == ifindex &&
if (nh->ifindex == ifindex && nh->nh_weight == weight &&
ipv6_addr_equal(gw, (struct in6_addr *) nh->gw_addr))
return true;
}
@ -2655,11 +2656,13 @@ mlxsw_sp_nexthop6_group_cmp(const struct mlxsw_sp_nexthop_group *nh_grp,
list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) {
struct in6_addr *gw;
int ifindex;
int ifindex, weight;
ifindex = mlxsw_sp_rt6->rt->dst.dev->ifindex;
weight = mlxsw_sp_rt6->rt->rt6i_nh_weight;
gw = &mlxsw_sp_rt6->rt->rt6i_gateway;
if (!mlxsw_sp_nexthop6_group_has_nexthop(nh_grp, gw, ifindex))
if (!mlxsw_sp_nexthop6_group_has_nexthop(nh_grp, gw, ifindex,
weight))
return false;
}
@ -4762,7 +4765,7 @@ static int mlxsw_sp_nexthop6_init(struct mlxsw_sp *mlxsw_sp,
struct net_device *dev = rt->dst.dev;
nh->nh_grp = nh_grp;
nh->nh_weight = 1;
nh->nh_weight = rt->rt6i_nh_weight;
memcpy(&nh->gw_addr, &rt->rt6i_gateway, sizeof(nh->gw_addr));
mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh);